Chainsaw Doesn't Start When Hot Reasons

Breakdowns can occur even in the most expensive garden equipment. But if your chainsaw won't start, it doesn't mean it's time to buy a new one or pay for expensive repair services. Most of the problems associated with this problem are not global and can be easily fixed with your own hands. The main thing is to correctly determine the reason why the chainsaw refused to properly perform its functions.

The chainsaw does not start - all the reasons and troubleshooting methods

One of the most disgusting phenomena. When I was about to cut down a tree, the chainsaw wouldn't start. Many people encounter this phenomenon not only as owners of cheap Chinese chainsaws, but also with branded professional tools. If you are faced with a situation where the chainsaw engine does not start, then do not rush to take the tool for repair. Ordinary preventive measures will help quickly restore the functionality of the instrument. The procedure for carrying out preventive measures to restore the performance of a gasoline unit is described in the material.

Features of adjusting carburetors of chainsaws of popular brands with your own hands

Despite the fact that, at first glance, all carburetors are the same, the adjustment of this unit may differ depending on the brand of the tool. The differences may be subtle, but they are there and worth mentioning.

Features of adjusting the carburetor of the Shtil 180 chainsaw with your own hands

The carburetor of the Shtil 180 chainsaw is quite interesting. Its peculiarity is that two of the usual three adjustment screws are missing. Therefore, adjusting the carburetor of the Shtil 180 chainsaw comes down to a simple idle adjustment using a single LD screw. But this cannot be said about another model of the Shtil 250 brand. Here the assembly is almost familiar, with three screws. The only difference is that the idle speed when adjusting the Shtil 250 carburetor is adjusted with screw H, not T.

PHOTO: shopozz.ru Quite a famous chainsaw in Russia – “Shtil 180”

The nuances of adjusting the carburetor of chainsaws, Ural brand

The adjustment is made according to the following algorithm. First, the idle speed is set (idle speed screw) so that the circuit is static. If there is strong smoke from the exhaust pipe, tighten the full throttle screw slightly. At the same time, there will be less smoke and the speed will increase. So, by aligning the screws one by one, you can achieve the optimal result.

PHOTO: your-home-and-garden.rfChainsaw “Ural” is already a classic

Then you should sharply press the gas lever. If the speed goes up quickly, then everything is normal, you can fix the idle screw. If they do not grow dynamically enough, it is worth turning the screw a little full throttle. And after running in, you can already adjust the maximum power.

By the way, a similar carburetor is installed on Taiga chainsaws, which means the adjustment will be identical.

PHOTO: grizzly-tool.com.ua The Taiga chainsaw is equipped with the same carburetor as the Ural one.

Chainsaw “Partner 350”: how to adjust the carburetor

Everything is simple here. The carburetor of the Partner 350 chainsaw is adjusted in accordance with the step-by-step instructions we presented today. But, if any of it remains unclear to the reader, we offer another option. Below is a video of adjusting the carburetor of the Partner 350 chainsaw, which will help you understand this issue.

Watch this video on YouTube

Husqvarna 142: how to adjust the carburetor of this chainsaw with your own hands

And this brand and model have no special features or differences. All adjustments to the carburetor of the Husqvarna 142 chainsaw (as well as 137 or 240 models) are made with your own hands according to a similar algorithm with step-by-step instructions. This is the most common setting option, which is why it was given in the above instructions. For example, the carburetor of the Carver chainsaw is adjusted in a similar way.

PHOTO: besplatka.uaHusqvarna 142 looks quite aggressive PHOTO: krsk.au.ru But the 240th model looks a little softer, but is not inferior in character PHOTO: zubilo-perm.ruCarver are trying to copy Husqvarna’s signature orange color

After winter I can’t start the chainsaw, what can you tell me?

If you use a chainsaw in winter or summer, then with the advent of spring, when it becomes necessary to prepare firewood, a malfunction is often observed in the form of the inability to start the tool’s engine. The prerequisites may vary, but the 1st step. Check the presence of gasoline in the tank. If the chainsaw has not been used for a long time, but the fuel remains in the tank, then difficulties in starting two-stroke engines are associated with the premise of fuel stagnation.

If the fuel in the tank has not been drained before storage, then there is a strong possibility that a plug has formed in the carburetor. You will need to disassemble the carburetor and clean it. To avoid these steps, you can do the following:

Unscrew the spark plug and inspect it. If it is dry and has the correct brown color, then no fuel is supplied to the cylinder.
20 grams of fuel mixture is drawn into a syringe and sprayed into the cylinder
The spark plug is twisted and the engine starts
If the ignition system is working properly, the chainsaw will start

When the engine starts, the purchased plug in the carburetor will burst and the engine will run normally. If the engine starts and stops on a chainsaw, then the function of adding fuel to the cylinder should be repeated a couple of times. If the tests are unsuccessful, it is necessary to clean the carburetor, but first check the serviceability of the fuel and air filters, the ignition module and clean the exhaust duct (muffler).

Difficulties in starting a chainsaw cannot be excluded for the following reasons:

Damping of spark plug electrodes
Oxidation of ignition module wire contacts
Damage to the insulation of a high-voltage wire
Ignition coil failure
Carburetor option required

Difficulties starting a chainsaw appear at some point. Everything depends not only on the properties of the tool and its price, but also on the features of care, operation and storage of the tool. With proper care and storage of the tool, you will never have problems starting the motor of your chainsaw.

How to start a chainsaw correctly - common methods

Each time, by correctly starting the engine of a utility gasoline saw, its owner ensures the coordinated and smooth operation of the garden tool’s devices, and also prevents rapid wear of its consumable parts. The procedure for starting a cool engine of different models may differ slightly, but almost always it looks like this:

The first step that the operator must take is to set the lever that regulates the position of the integrated throttle valve to its lowest position. With all this, you need to take into account that the lever can only be switched to this mode if the gas trigger is pressed. By moving the lever down, the operator will close the damper located in the standard carburetor and lock the gas supply lever in the clamped position;
Next you need to start manipulating the starter cable. To do this, you need to insert your right leg into the “eye” located in the back of the body, and rest your left hand on the handle of the chainsaw. Then you need to sharply pull the cable of the built-in starter of the garden tool a couple of times. As the saw engine starts and stalls, the throttle position switch lever will need to be moved up one position;
After which you will need to sharply pull the recoil starter cable a couple of times again. As a result, the internal combustion engine of the saw should start and immediately begin working at the highest possible speed. This is due to the fact that the operator previously fixed the throttle trigger in a clamped position;
Then you need to press the standard gas trigger once and immediately release it. After which the throttle valve shift lever should return to its operating position. This will immediately reduce the engine speed. This means that you can start using the chainsaw on the site.

READ What You Can Make From a Chainsaw Chain

If the operator needs to start a garden tool with a warm engine, then to do this, the throttle position lever must be moved to the penultimate position up and the starter rope must be pulled. To turn off the engine, the throttle position switch lever will need to be moved to a very acceptable upper position.

In some models of chainsaws used in households, the industrial motor is started in the following sequence:

First you need to turn on the ignition and move the switch to the appropriate operating position;
Next, you need to press 5-6 times on the transparent plastic primer required to pump fuel into the cylinder;
The operator will then need to fully pull out the integrated throttle valve position adjustment lever;
Then you need to sharply pull the recoil starter cable a couple of times. Once the factory engine starts and stalls, you will need to press the throttle adjustment lever all the way in and pull the starter lever a couple more times. The operating instructions for some models indicate that after the engine stalls, the damper adjustment lever must be pressed only halfway. With all this, it is necessary to fully press the lever only after the chainsaw’s internal combustion engine has started and begins to operate smoothly;
In models where the throttle trigger is fixed when the throttle adjustment lever is pulled, the engine will start to operate at high speeds. If the gas trigger in the chainsaw is not fixed, then the engine speed will be the lowest. Because of this, the internal combustion engine may stall a few seconds after starting. In this case, it is necessary to start the engine of the garden tool until it warms up and begins to work more steadily.

If the operator needs to start a chainsaw with a warm engine, then he will only need to turn on the ignition and sharply pull the starter cable a couple of times.

The main reasons why a chainsaw won’t start

When the chainsaw does not start, the search for the cause should begin with research procedures. To carry them out, it is absolutely necessary to understand the structure of a gasoline tool, and simply adhere to the sequence of actions. General reasons why your chainsaw won’t start:

Fuel mowing line malfunction.
From the tank, fuel in the form of gasoline and oil flows along the fuel strip into the carburetor. The carburetor membrane, which plays the role of a pump, is responsible for its transportation. If there is no fuel in the tank, then naturally the chainsaw will not start, so first make sure that there is fuel in the gas tank.
Ignition system.
Most often, a spark must be the reason why a chainsaw engine will not start. This is due to the fact that it has a certain resource, and if the tool is used often and for a long time, then the candle fails. After making sure that there is fuel in the tank, you need to check the condition of the spark plug
Filter elements.
These are fuel and air cleaners that prevent fine grains of sand from entering the carburetor and cylinder. The fuel filter cleans the fuel, and it is placed on the fuel supply strip in the gas cylinder. The air purifier is located on the carburetor and limits the entry of chips and sawdust into the carburetor.
The pressure reducer or pressure rectifier is the smallest element and is often the main reason why a chainsaw will not start.
The main symptom of a faulty breathing tube is when the engine lags during operation.
Silencer or exhaust duct.
When the tool is used, carbon deposits settle on the walls of the exhaust system. As a result, the exhaust gases do not reach anywhere, and therefore the chainsaw will not start, and if it starts, it will stop immediately
Carburetor.
This is a more serious malfunction that can be eliminated by cleaning the device responsible for mixing fuel with air and supplying the finished mixture to the cylinder. Connecting the channels and jets of the carburetor leads to the fact that the engine will not start
CPG.
This is the most extreme reason why a chainsaw won't start. A compression gauge will help verify the wear of the piston cylinder group. By measuring the compression of the chainsaw, you can draw a corresponding conclusion about the health of the motor itself.

These are all the components that need to be checked in order to find and remove the reason for the inability to start the chainsaw engine. We will look more closely at each type of defect, as well as methods for eliminating them further.

Owner reviews

Ivan Samoilov, 38 years old, Amur region

“My Chinese saw doesn’t start well; in general, we can say that it doesn’t start, because it immediately stalls. I start it up through rather complex manipulations, at full throttle it works and saws for some time. However, after a short time it begins to sneeze and stalls - it is impossible to work. I tinkered with it myself for a long time, and then took it to the workshop. It turned out the magneto came off - I never would have thought it was the fault of the carburetor.”

Ivan Vesnin, 33 years old, Solnechnogorsk district

“After winter I decided to take my chainsaw for a walk in the garden. Right away everything went well, I managed to start it up quite quickly, after warming up I even trimmed one apple tree, and then it began to stall. It will run for 8-10 minutes and then die. And not only under load, but also at idle. I was already scared - I decided that it was time to change the piston. And then I think: let me clean the breather. It worked for an hour - it saws perfectly, it picks up speed evenly and quickly, it starts at half a turn, I completely forgot what it means to stall. These are childhood diseases.”

Yakov Baulov, 59 years old, Siberian Federal District

“After a long period of inactivity (I didn’t approach it for the whole winter), the chainsaw began to stall at high speeds and when the gas was sharply applied. It seems to start gaining momentum, but when adding gas, at some point it stalls. It didn't start very well from the very beginning, but I adjusted the carburetor and it seemed to work out. In short, I searched for the fault for a very long time until I climbed into the gas tank and discovered that my chainsaw was not equipped with a fuel filter - there was simply the edge of the fuel line sticking out. This is a complete failure - how could such a unit be released from the factory. Now I fixed it - it started working normally, no longer stalls. Laughter and tears – where is this world coming to.”

Chainsaws are lightweight in design and reliable in operation.

Read also: Carrot for wood splitter drawing

When handled correctly, breakdowns occur occasionally and are quickly eliminated if the owner knows where to find the cause.

And yet, the question of why the chainsaw won’t start cannot be answered with complete certainty. Such a tool in its own right is an ordinary two-stroke gasoline engine. For its normal operation, four conditions are needed: fuel, air, spark and lubrication.

The carburetor is responsible for producing the air-fuel mixture, the filter cleans the air from dust, the ignition unit and spark plug provide the spark, and the lubricant is found in gasoline.

The reasons why the chainsaw refuses to start must be found one by one, from the usual ones and moving on to more complex ones. Anyone who immediately rushes to disassemble the carburetor when the chainsaw has trouble starting when hot is taking a very big risk. It is better to repair and adjust this unit in a special workshop, and not on your knee.

When, some Russian auto industry chainsaws, if you set a goal, users did not go into the carburetor to configure the composition of the fuel consistency, they make the jets unregulated.

For trouble-free operation of the chainsaw, it is necessary to pay increased attention to fuel . If the fuel mixture is not prepared correctly, then even a reliable Husqvarna will not start. With all this, the owner will begin to find the cause of the malfunction in any way, alas, not in the fuel. To eliminate this factor, it is always necessary to prepare a fuel mixture from high-quality gasoline and the brand of oil indicated in the annotation.

It must be done in such quantity that it can be produced one hundred percent in 10-15 days . If you keep it in a canister for a month, the gasoline will lose its octane properties and problems with the service of the saw are guaranteed for you.

Read:

Chainsaw malfunctions often occur due to the spark plug being flooded with gasoline at the time of start-up. This problem can be solved by turning out and drying the spark plug (without calcination!) The excess fuel is drained through the spark plug hole, after that they take a 20-30 minute break, then put the spark plug in the area and repeat the start. A good owner always has new spark plugs in stock so that when troubleshooting, they can exclude this part from the list of suspects.

The lack of a spark is often caused not only by a spark plug failure , but also by poor contact between its tip and the high-voltage wire. If this connection does not cause suspicion when checked, but a spark does not occur when the starter is turned on, the electrical ignition unit will be at fault. Such a unit is not repaired, but replaced with a new one.

Don't forget that inspecting the spark plug provides important information. If it is dry, it means that no fuel is entering the cylinder and it is necessary to inspect the entire supply chain from the carburetor. Dark carbon deposits indicate an incorrect adjustment of the carburetor, which supplies too much fuel to the mixture, or an overflow of oil into gasoline.

If the chainsaw starts and stalls when you press the gas, this indicates a poor fuel supply. The reason for this is that the fuel filter or carburetor jet is clogged. Of course, the first unit should be checked and cleaned in a short time, but in the second case it is better to trust the specialists.

Disassembling and cleaning a chainsaw carburetor requires experience and accuracy . Therefore, it is usually taken up only by those owners who have already successfully performed this function more than once.

You should also pay attention to the air filter so as not to find the cause of malfunctions in the chainsaw in the wrong direction. If it is clogged with dust, then you cannot count on easy starting and smooth operation.

myth the valve smooths out the pressure in the gas tank over the course of fuel consumption. When it becomes clogged, a vacuum appears in the tank and fuel stops flowing into the carburetor. This disease is treated by cleaning the breather using an ordinary sewing needle.

It is not difficult to exclude breather from the list of suspects . For this purpose, it is necessary to disconnect the fuel hose from the carburetor and see if fuel flows out when using it. When gasoline flows in a working stream - the breather is clean, in which case fuel does not flow from the gas line or flows out very slowly, then the cause of the malfunction has been established.

Many owners of new Shtil chainsaws are frightened by the increase in idle speed after the first tanks of gasoline are used up. Experts consider this behavior of the saw to be normal and indicating that the running-in of the engine and carburetor is proceeding normally. Do not rush to contact the service center, but simply slightly reduce the engine speed with the carburetor idle screw.

If the power has dropped and the chainsaw stalls at idle , do not forget to check the muffler, which you prefer is clogged with tarry exhaust deposits. Cleaning the exhaust channel and muffler eliminates these difficulties.

What to do if your chain saw won't start

Good afternoon, dear readers and subscribers of my blog! At some inopportune moment, you may find that your chainsaw

won't start. But don’t rush to immediately take a repair tool; perhaps you can fix this breakdown yourself. I will tell you what to do in cases where the chainsaw does not start, and how to find the right solution to this problem.

Exhaust duct or muffler cleaning and influence on engine starting

During operation of the chainsaw, tar deposits are deposited on the walls of the exhaust duct and muffler. Carbon deposits. At times, these carbon deposits need to be cleaned, but most tool owners only remember this after the chainsaw does not start. Why is this happening? Cause

The problem is that the burned food will not go anywhere, so the engine will not be able to start. When the exhaust channel is dirty, the chainsaw not only loses power, but also its independent engine stops working.

Deposits on the walls of the muffler are due to the following factors:

Introduction of bad gasoline and oil
Incorrect ratio of gasoline and oil when mixing
Long-term implementation of the product without preventive measures

There are no problems with cleaning the chainsaw muffler. The cleaning sequence is as follows:

First, unscrew the screws securing the muffler.
The cooling panel with gasket is dismantled
Next you need to remove the spark gap
The resonator body is disassembled
All elements are cleaned and washed from carbon deposits with kerosene or other cleaning liquids. This must be done only with the help of a respirator and glasses. Carcinogenic substances are very unsafe for humans
Wait for the cleaned items to dry
Reassemble in the reverse order of removal.

When cleaning the walls of the outlet channel, you need to cover the cylinder hole with a rag. This will eliminate the possibility of dust and sand getting into the cylinder. After cleaning the muffler and exhaust duct of the chainsaw, you can start starting the tool’s motor. With all this, you will feel like the chainsaw is working at full power.

Characteristics of the internal combustion engine of chainsaws

The main malfunctions of chainsaws are associated with engine failures. Russian and foreign manufacturers use single-cylinder two-stroke internal combustion engines as a chain drive. The design of the motor is ordinary. Ignition is ordinary, without installing capricious electronics. Chainsaw engines operate reliably in different weather conditions. Fuel for a carburetor engine is obtained by mixing AI-92 gasoline and special oil. Because the design does not include an oil pump, the piston and cylinder are lubricated with a mixture of gasoline and oil. The saw engine develops power from two to 5 kW, and the crankshaft speed reaches fourteen thousand rpm. At such high speeds and loads, the requirements for oil are special. Use the oil indicated in the instructions. When changing the oil to regular motor oil, the tool's service life is sharply reduced. Remember that filling the tank with gasoline without adding oil is strictly prohibited.

The chainsaw immediately stalls

What to do if the chainsaw stalls immediately after starting? First you need to check the presence of fuel in the gas tank. If its level is not sufficient, then it is necessary to prepare the fuel mixture in strict accordance with the ratio of gasoline and oil prescribed in the instruction manual. Gasoline must have a very high octane number, and the required brand of oil is usually indicated in the chainsaw’s data sheet.

Next, we check the spark plug, as well as the contact of its tip with the high-voltage wire. The gap between them should be less than 0.5 mm. If necessary, the candle is cleaned of carbon deposits and dried. It is recommended to change the spark plug from time to time to a completely new one. The reasons why the tool stalls when you press the gas lie in the fuel filter or carburetor jet. Cleaning the gas filter will not take much time and effort, but it is better to entrust the disassembly and cleaning of the carburetor to the specialists of the service center.

Main reasons for not starting when cold or hot

If a spark appears on the chainsaw, but the tool does not begin to cool, then the reason lies specifically in the lack of compression. Determine the amount of engine compression to check this problem. If the compression value is not lower than eight atmospheres, then everything is in order. If not, then the engine has exhausted its own output and needs to be replaced with a CPG. When iron parts are cool, they narrow, thereby reducing compression. To start the chainsaw on a cool engine with low compression, do the following:

Pull the starter handle until the internal parts become hot due to friction
When the parts heat up, the compression will increase, so the engine will start
It is recommended to carry out these manipulations in the warm season, since in winter it is almost impossible to start a chainsaw with low compression.

READ Adjusting the Carburetor of the Stihl 361 Chainsaw with Your Own Hands

It must be emphasized that working with inventory with low compression is very harmful. Apart from low performance, such work will inevitably damage the chainsaw motor.

Another situation when the chainsaw does not start hot.

At first this is due to flooding of the engine. If it starts fine on a cool chainsaw, but when there is a break after work and difficulties arise with starting, then you need to start without closing the air damper. The damper must be 100% open (air is supplied) to start the engine hot. If you are unable to start your chainsaw, a semi-closed choke is a must. Try to start the engine, and once it starts, you can open the throttle to one hundred percent.

If you cannot start the engine with a heated chainsaw, do the following:

Unscrew the idle screw clockwise to turn the rotor.
By increasing the number of revolutions, the process of starting the engine is simplified
Start the engine at half open throttle
After starting the engine, return the idle screw to the reverse position if the chain moves at idle

Filling of the spark plug may be due to a malfunction of the ignition module, as well as a large gap between the coil and the magnet. If the reason for the inability to start the chainsaw engine is in the carburetor, then it should be adjusted as quickly as possible.

Video

The main reasons why the chainsaw does not start in the video. The video will be useful for those who quickly want to start a saw; the author gives practical advice.

If a situation arises when the chainsaw does not start, it is important to correctly diagnose it and determine the direction in which to look for the fault. You should not use a tool that does not idle, as this indicates that there is air leaking into the engine and can lead to serious problems. If you don’t have enough experience in repairing chainsaws, it’s better to contact a specialist who will save your time and nerves.

Shtil 180 chainsaw won't start? Reasons and solution!

Today, the manufacturer Shtil occupies a leading position among other companies that produce equipment intended for agricultural and construction work. The products of this manufacturer are famous not only for their high level of quality, but also for the optimal pricing policy and the power of its models.

It is probably quite difficult to meet a person who does not have a chainsaw of this brand. This is one of the most famous companies in the world. But the fact is that out of ten possible, six people definitely have them. And this is not surprising, since Stihl chainsaws represent power along with graceful design. But unfortunately, such giants of technology sometimes break down and require a certain kind of repair. Today we will pay attention to one of the brands of this manufacturer, namely the Stihl ms 180 chainsaw. Read about the stihl ms 660 chainsaw here. So let's get started.

Chinese and new chainsaw does not start, what could it be?

The popularity of Chinese chainsaws knows no bounds. This is due to their main advantage. Affordable price. At the same time, owners of Chinese chainsaws often have questions about starting the tool’s motor. Before you find out why the Chinese chainsaw does not start, it is necessary to emphasize one feature. The design of these instruments is no different from Russian, German and other manufacturers. That is why the reason why the chainsaw does not start can be found based on the above method.

Chinese chainsaws are very sensitive to the quality of fuel, so checking the fuel comes first in the diagnostic method. The introduction of bad fuel leads to the fact that the tool does not work at full capacity, its service life is reduced, and difficulties with starting appear. The annotation for the tool shows the recommended type of gasoline and oil, which is important to use in order for the Chinese chainsaw to work for a long time and at full power.

Characteristics of the internal combustion engine of chainsaws

What is a breather and how does it affect the reasons for the inability to start a chainsaw?

Not many people from the sawmill know about the existence of such an element on a chainsaw as a dihalnik. This is one of the fundamental parts of the tool, which is responsible for balancing the pressure in the fuel tank. The mechanism of operation of a fan on a chainsaw is that when the amount of fuel decreases, a vacuum or vacuum appears in the tank. The less fuel in the tank, the higher the pressure, which becomes an obstacle to the passage of fuel into the carburetor. To reduce the pressure in the tank, a fan is used, which is a valve that allows air to flow in one direction.

If the air inlet is clogged, air does not enter the tank, which means that the pressure begins to rise. There is a fan on the cap of the chainsaw fuel tank (depending on the model), and if the two-stroke engine of the tool does not start, you need to check the ventilator.

Check that the breathing apparatus is faulty:

Unscrew the fuel tank cap. If the air is bleeding, this indirectly indicates a malfunction of the pressure regulator.
Screw in the gas cap again, and then try to start the engine again. If the engine starts, but after a while it goes out, then the engine must be cleaned
The next method is to check if the fan is working. Disconnect the fuel hose from the carburetor. If fuel flows out of it at times, then the device is working properly. If the stream is weak and intermittent, then to clean the motor you need to clean the blade on the chainsaw

The fan (fuel tank valve flap) is cleaned with a needle. If the fan is very clogged, you will need to remove the filter element and clean it. On different models of chainsaws, the location of the fan is different (on most models it is located in the cap for the gas tank). Below is the process of cleaning a breathing apparatus using a Husqvarna chainsaw as an example.

DIY chainsaw carburetor repair Partner 350

The carburetor parts of the Partner 350 chainsaw do not experience strong mechanical and thermal loads during operation, unlike, for example, a piston system. Therefore, in theory, there is nothing to break in it. In practice, after many years of operation, gaskets most often depressurize and the elastic membrane fails. Over time it can become tough.

In addition to breakdowns, the carburetor of the Partner 350 chainsaw may fail due to contamination. For repairs and cleaning, the carburetor is removed and disassembled.

It is worth noting that the accelerator pump of the Partner 350 carburetor is its weak point.

How to remove and disassemble: step-by-step algorithm

Before removing, the carburetor of the Partner 350 chainsaw and the space around it must be cleaned with a brush so that dirt does not get inside the engine. After which they remove:

Air filter.
Fuel hose.
Throttle linkage.
Then the screws securing the carburetor to the engine body are unscrewed.

After removal, place the carburetor on a clean surface and unscrew the screws securing the cover to the body. Remove the cover and gasket. Parts and fasteners are laid out sequentially. Disassembly is carried out slowly, remembering well which part was removed from where

It is extremely important not to confuse screws H and L when assembling. They are the same in shape, but different lengths

After the operations have been completed, the Partner 350 carburetor is available for cleaning.

This is what a half disassembled carburetor looks like

Cleaning the carburetor: basic points, how to clean it correctly

Whether the carburetor is clean or not is usually determined immediately, visually.

First of all, the smallest holes become contaminated - in the nozzle, diffuser, channels. There may be dirty sludge in the chambers. The disassembled carburetor body and parts are washed in a bath of gasoline or kerosene. Then the channels and holes are blown out with a car pump or air compressor. It is best to use a special nozzle with a thin channel at the end. Wash again.

During assembly, if necessary, replace the gaskets and membrane with new ones from the repair kit.

When cleaning the carburetor, be sure to clean the hole in the cover under which the membrane is located. Marked in the photo with a red square

Repair kit: what is included in it and where to buy

Repair kits are sold with two sets of configurations.

The first includes gaskets and a membrane, that is, non-metallic spare parts. The second one additionally comes with a crosspiece with a needle valve.

Repair kits cost approximately from 300 to 370 rubles. and are sold in specialized stores and on many online platforms.

Checking the spark on the spark plug and the gap between the coil and the magneto

Spark plug. This is the fundamental part that ignites the fuel mixture and enters the cylinder chamber. If the candle has served its own purpose, it will produce a weak spark or none at all. You can check this as follows:

Unscrew the spark plug
Place it on the cylinder, connecting it to the light fixture
Turn on the ignition
Pull the starter handle

If a spark appears constantly, this indicates the serviceability of the spark plug. In this case, not only the spark plug is in appropriate condition, but also the ignition system. Coil and high voltage wire. If a spark appears on the spark plug, but intermittently (with breaks), then such a part must be changed. First you need to check the gap between the contacts. The gap should be from 0.5 to one mm.

For each chainsaw model, manufacturers indicate the recommended gap size, so it is necessary to use a reference book. You can measure the gap using a special probe or a sheet of paper folded a couple of times.

The absence of a spark on the spark plug indicates a malfunction of the ignition system, so before replacing the part, you should make sure that the ignition coil and high voltage wire are in good condition.
The chainsaw
may not start due to clogged spark plug electrodes. The presence of dark carbon on the spark plug or wet electrodes. All this may indicate subsequent malfunctions:

Black carbon carburetor.
The chainsaw is not set up correctly . The mixture enters the cylinder, containing a lot of fuel and little air. The malfunction can be corrected by cleaning carbon deposits on the spark plug electrodes and then adjusting the carburetor
If the candle is wet (it floods), then this may indicate the following.
Either the ignition system (including the spark plug itself) is faulty or excess fuel enters the cylinder, thereby filling the spark plug. First you need to make sure that the spark plug produces a good spark, and only then adjust the carburetor. It is not recommended to dry a wet candle by heating, so it should be wiped dry and then allowed to dry in the sun
If the spark plug has red or pink carbon deposits on the electrodes, this indicates that the gasoline used contains a large amount of additives.
Usually this effect is produced by AI-95 gasoline and higher gasoline, an increase in the octane number of which is achieved by adding additives

When the spark plug is brown (brick color), this indicates not only that the chainsaw carburetor is correctly adjusted, but also that the ignition system is working properly. If you are using a new spark plug that produces a weak spark (or no spark at all) when tested, this is a sign of a faulty ignition coil. The coil needs to be replaced along with the high-voltage wire.

Tools and materials

Diagram of a two-stroke chainsaw motor.

The design of mechanical components of chainsaws is characterized by good reliability and maintainability. Virtually all units and parts have open access. If the necessary equipment is available, they are simply removed for repair or replacement. To disassemble and check the life support systems of a chainsaw motor, you should stock up on the following tools and materials:

Set of plumbing and assembly tools;
Spark socket wrench;
Tester;
Pressure gauge for measuring compression;
Feeler gauges for measuring gaps;
Needle;
Sandpaper;
Fuel mixture (gasoline oil);
Rags.

If the chainsaw doesn’t start, what should you do?

Above. The main reasons why a chainsaw will not start. Moreover, this applies to tools from different brands: Stihl, Husqvarna, Partner, Makita, Champion and others. The principles of a chainsaw have a different operating principle, but in general, troubleshooting should begin with the ignition system, more precisely. Check the condition of the spark plug electrodes. If the manipulations carried out do not help to obtain the desired result, then it is necessary to resort to more serious actions. This means you need to follow these steps:

Check the carburetor and adjust it
Measure the amount of compression of the engine, and then draw the appropriate conclusion about its health
Crankcase compression is checked

Checking the compression in the cylinder allows you to assess the condition and serviceability of the CPG

. To measure compression you need a compression meter. It is screwed into the spark plug hole, after which the starter handle is removed. The compressor displays the corresponding cylinder pressure. This value should be at the level of 8-12 atmospheres.

If the pressure is significantly lower, then this is a direct sign of a device malfunction. In case of malfunction, the cylinder-piston group is replaced with a new one. When installing a new CPG, it is necessary to thoroughly oil all parts so that chips and abrasions are not created when the engine is started.

If there is no compression in the crankcase, the chainsaw will also not start.

The reason for the decrease in pressure in the crankcase is the gasket, or rather its damage. This gasket is placed between the cylinder and the crankcase, and to ensure that it works properly, the following manipulations should be performed:

Disconnect the fuel line from the tank
Place the tube in a container with the prepared mixture of gasoline and oil
Start the chainsaw engine
If the engine starts and fuel is drawn in, this indicates that the gasket is in good condition.

READ How to Saw Slate with a Wave Disc

If fuel is not drawn in, the crankcase gasket must be replaced.

Carburetor. An important and difficult part of the chainsaw.

If all of the above steps do not help to obtain a positive result, then this indicates a carburetor malfunction. Major carburetor malfunction. Clogging of its channels and jets. Membranes and other elements fail less often. In any case, you will need to disassemble the chainsaw's carburetor, clean it and replace faulty parts.

As you can see, there are plenty of reasons why a chainsaw won’t start. To find out what exactly happened in your case, you need to remember the symptoms from the day before. It is possible that before the chainsaw stopped running, engine problems were noticed, power and performance decreased, and other breakdowns were present. Based on these technical symptoms, you need to start searching. If you don’t know where to start, then diagnostics should be carried out in the order as described in the material.

Where to look for the reason or where to start checking

All chainsaws have the same design and work on the same principle. The structure of a chainsaw can be found in this material. It doesn’t matter much what brand the instrument is - Shtil, Husqvarna, ECHO, Champion, Partner, Sturm and others. A malfunction that manifests itself in the form of a chainsaw stalling when you press the gas can occur equally on both expensive and high-quality tools and on budget Chinese devices. If a problem arises, it needs to be solved.

A chainsaw is a system of mechanisms consisting of parts. Any part in the mechanism can fail, which will lead to partial or complete failure of the tool. If the tool’s engine starts, this does not mean that the chainsaw is fully operational. When the engine stops working when the speed increases, there are corresponding reasons for this.

In case of this malfunction, you should first pay attention to a number of the following tool mechanisms:

Gas tank - make sure there is fuel. If there is sufficient fuel, you should also check the serviceability of the fuel filter, the connection of the supply hose to the carburetor, and also make sure that the breather is working
Spark plug - if everything is in order with the fuel supply system, then you should check the serviceability of the spark plug. By the color of the carbon deposits on the spark plug electrodes, you can determine the cause of the breakdown. If the carbon deposits are brown, then the spark plug, ignition and fuel supply system are operating in the correct mode. The presence of black carbon deposits indicates an ignition malfunction, and if the electrodes are wet, then the carburetor should be checked
Muffler - over time, carbon deposits accumulate in the exhaust gas removal device, which helps reduce the throughput of the mechanism. If the exhaust gases have nowhere to go, they will interfere with the normal operation of the engine. In addition to a decrease in power, if the muffler is faulty, the engine will stop working when the speed increases

These are the main parts and mechanisms that should be checked first if a malfunction occurs when the chainsaw stalls when the accelerator is pressed. There are other reasons why a chainsaw engine stalls when the gas trigger is pressed. What else can contribute to the occurrence of this malfunction, as well as the specifics of troubleshooting, we will find out further.

Chainsaw doesn't start well when cold

Violation of the sequence of actions when starting on a cold

If a new chainsaw does not start when cold, the reason may be an incorrect engine starting sequence. As a rule, each manufacturer in the instructions for the chainsaw indicates the procedure for starting the chainsaw when cold. It is basically the same for all two-stroke internal combustion engines found on chainsaws and is the following procedure.

Closing the air damper (needed to enrich the fuel at startup).
Suctioning fuel using a special primer for this (on some models of chainsaws, primer is not provided by design, and therefore this element is not available for them).
Turning on the ignition (if you forget about this, you may mistakenly consider the device to be faulty).
Make several movements of the starter before the first “flash” of the engine (it is important not to miss this moment, otherwise it is possible to “flood” the engine).
Set the air damper to the open position.
Start the chainsaw engine.

Engine jammed

Quite often there is a situation where the saw was working and sharply dulled, the cause of which was engine jamming, which in turn occurred as a result of rupture of the piston skirt, destruction of the crankshaft bearing, protrusion of the piston rod plug ring or piston ring.

A stuck motor can be easily identified by pulling the cord. If the starter does not turn on, it is most likely jammed, and subsequent repairs are only possible at a service center.

Malfunctions in the ignition system

If, upon inspection of the spark plug, it is found that it is wet and there is no spark at the contacts, this means that the problem should be looked for in the ignition system, inspect the coil, check the gap between the flywheel and the coil contacts. You can also check how tightly the high-voltage wire cap fits on the spark plug and on the spark plug itself. Try replacing it with a new one.

Overheat

Overheating the engine during operation may cause the saw to freeze and not start. Overheating is quite dangerous, as it can cause the piston in the cylinder to melt and the engine to seize up. At the first cases of overheating, it is worth diagnosing the tool for the presence of foreign air being sucked into the engine and adjusting the carburetor.

Air leakage, as well as improper carburetor adjustment, affect the maximum number of engine speeds and its lubrication, which, in turn, causes overheating and clogging of the tool.

Switching system design

A key role in any chainsaw is played by a two-stroke carburetor power unit. Its power directly depends on the chosen model and purpose. The second important mechanical unit in the device is the saw part, which consists of a bar, cutting chain and sprocket. The parameters of these components may vary.

Treatment with lubricating mixtures is carried out using special oil, which is poured into a specialized reservoir, which is located on the hand block. Separately, it should be noted that the volumes of the oil tank and fuel are calculated in such a way that their contents, as a rule, end at the same time.

Troubleshooting options and methods

Regardless of the brand of chainsaw - Champion, Husqvarna 236 or Patriot, the reasons for poor performance are identical. There are a lot of options why the Shtil chainsaw won’t start, but the most common are the following.

Chainsaw doesn't start well when cold

If the saw does not start well when cold, it means there is no compression. This occurs due to abrasion of the rings due to prolonged use. It turns out that when the user tries to start the Champion 137 in a cold state, the compression will not be enough to carry out this manipulation.

In this case, it is not recommended to systematically pull the handle. In the end, the unit will still start, but other mechanical components may break down. In this situation, you need to replace the worn rings with new ones.

Chainsaw won't start when hot

Here the reasons lie in engine flooding and wet spark plugs. Here's what to do in this situation:

move the air damper to the middle position;
Blow the component parts well;
start the device for 10 seconds;
switch to idle mode;
on a caliber chainsaw or another model, fully open the damper.

Next, simply start the engine at idle speed by pulling the handle. If the engine does not overheat, it will start easily.

If this troubleshooting option did not help, it means that the motor has already cooled down significantly. Fix the half-gas according to the recommendations from the instructions and repeat the operation.

You should also try turning the cold speed screw in a clockwise direction. The higher the rotation speed in the equipment, the easier it is to start it. You should know that the chain must remain stationary at idle.

VIDEO: Why the saw does not start or stalls and how to fix it

The chainsaw has difficulty starting and immediately stalls

In this situation, the cause is the filling of the spark plugs with gasoline at the moment when the user tried to turn on the unit. A small amount of fuel accumulates under the spark plug electrodes, which is why there is no spark in the equipment.

Removing the candle and drying it thoroughly will help solve the problem. In addition to these actions, you can additionally carry out heating. But this manipulation should be carried out exclusively using a gas burner. Otherwise, a small deposit may form in the area of the electrodes. After the spark plugs have completely dried, you need to drain off the excess fuel and leave the equipment itself to dry.

Chinese saw won't start

It should be noted right away that Chinese devices do not have any distinctive features from other analogues. They are just as reliable and productive, and also cost less. The only thing that is necessary individually for this device is to use only branded oil and fuel.

Most units do not work well with fuel from domestic manufacturers; gasoline clogs the channels and, as a result, fuel does not flow to the engine. Use fuel either of high quality or from the manufacturer of the saw itself.

VIDEO: How to properly adjust the carburetor so it doesn’t stall

Why doesn't the new saw work?

New equipment should not have problems with wear and tear on functioning mechanical parts, since the model has just left the assembly line. Such untidiness may arise if you purchase demonstration equipment that has been used more than once to advertise the company. The reason may also be improper operation of the unit, which does not comply with the recommendations from the instructions.

Husqvarna chainsaw repair diagram

First of all, you should check whether all the parts and components are installed in their places. Also, for example, Husqvarna will not start if it has been filled with a fuel mixture prepared without taking into account the required proportions.

But if all the recommendations are followed, every detail is carefully fixed in its place and the equipment was not purchased from a stand, the buyer probably received a defective device.

There is not enough fuel in the tank or it is of poor quality

This is one of the most common reasons. Users of gasoline vehicles, in order to save money, often use budget fuel. At first, the unit will perform its job properly, but the problem will certainly arise after a few months of operation.

It should also be remembered that fuel has an expiration date; it should not be stored in the tank for more than three weeks. Such a liquid, with constant contact with oxygen, quickly loses its octane number. This makes gasoline completely unsuitable for use.

Problems with filters

Dirty filters are one of the main factors that cause a chainsaw not to start. Check the air filter for cleanliness; it is located under the housing cover. The fuel purifier is located directly in the fuel tank.

Air filter and spark plug location

In addition, you should inspect the breather in the gas tank. To diagnose, you should remove all possibly clogged parts for a while and start the device without them.

How to properly break in a chainsaw

In order for new equipment to work properly, it must be properly run-in.

First you need to prepare the fuel mixture, the proportions of which depend on the power:

for engines with speeds up to 5000 rpm, the optimal proportions of oil and gasoline are 1:25;
for engines with speeds up to 120,000 rpm, the oil to gasoline ratio is different - 1:50.

Fill the fuel tank and turn on the saw at medium power.
Let it run for 4-5 minutes, then idle for 15-20 seconds, and so on until the fuel runs out.
In this mode, you run 5-10 cycles, after which you can begin full-fledged work at full power.

When you need to refill the tool, you need to wait for it to cool completely. It is strictly forbidden to pour fuel mixture into a hot engine - this can lead to dangerous situations. And always refuel away from flammable objects.

Some models of chainsaws have 2 separate tanks - for gasoline and for oil; already during operation, the components are mixed together in the required proportions. Before refueling, make sure what type of dressing you have to avoid excess oil.

Chainsaw won't start

Every person who is familiar with gasoline tools knows that sometimes the equipment works intermittently, or it may freeze in an instant and will not start again. Reasons why chainsaw

won't start, we'll try to look at the most common ones.

Fuel problems

As with a difficult hot start, problems with the fuel system can cause a cold start or failure to start. Carburetor adjustment, fuel filter and cutting line contamination. These are all the reasons that cause startup difficulties.

Diagnose the fuel system, this is the first thing you need in case of a difficult cold start.

It is worth paying attention to the quality of the fuel, since when using a mixture of gasoline and oil that contains a small amount of water, starting can be significantly difficult or impossible.

Separately about the breakdown of the most common model

Let's look at the problems of Shtil 180 in more detail:

Clogged carburetor or fuel filter. These are the most common problems that can be easily resolved after cleaning. Sometimes the filter has to be changed;
Replacing the spark plug;
Sometimes the cylinder or seals need to be replaced.

The Shtil saw is quite strong and durable, so you can often fix a breakdown yourself. In fact, the same applies to the Partner, Ural, Makita and Husqvarna models.

When we discover a malfunction in our chainsaw, we look for the cause in small ways, gradually checking and eliminating the problems. Such problems are easy to fix yourself. But if the breakdown is serious, and you do not have enough experience, then this should be done by a specialist.

Why does a chainsaw have trouble starting?

Fuel and air filters;
Reduced compression;
Carburetor adjustments;
Spark plug;
Ignition coil;
Gap between ignition coil and flywheel;

Let's look at each reason in more detail.

Engine faults

CPG seizure, ring sticking, CPG wear, air leaks through cuffs and gaskets, loss of compression, all of these problems can make starting a chainsaw impossible or significantly more difficult. For example, if the CPG is significantly worn, the compression in the engine is reduced. In this case, it will be significantly difficult to start “cold”, or the saw may stop starting, but when “hot” the tool will start well.

Accurately diagnosing engine problems associated with starting problems is quite difficult, and for this it is better to contact a specialist in this field.

Checking the spark on the spark plug and eliminating the causes.

The first step in finding the reasons why your gas saw won't start. This is to check the spark at the spark plug. There are many factors that affect the performance of this element. However, the main ones at the initial stage of troubleshooting the tool are:

Incorrect carburetor adjustment;
The presence of more oil in gasoline than it should be;
The air filter is clogged.

All of them contribute to the formation of carbon deposits on the spark plug electrodes. In fifty cases out of a hundred, saws do not start when cold due to lack of spark due to carbon deposits on the electrodes and their corrosion. As a result, the gap either decreases or increases.

Checking the spark plug with a chainsaw at idle

Checking for a spark is quite simple. For this you will need:

Remove the tip of the high-voltage wire;
Unscrew the spark plug;
Put the tip back;
He leaned the candle's skirt against the cylinder;
Start with the starter.

If between the electrodes when starting the chainsaw engine

there is a good spark, then everything is in order with the ignition unit. If it is not there, then you should clean the element itself and check the electrode gap. If necessary, use a special probe to adjust the distance between the contacts.

The spark plug may spark for other reasons. The main malfunctions that affect poor starting of the chainsaw and unstable operation of the internal combustion engine at idle, due to which the tool can stop, include the following:

Overfilling of the spark plug channel with fuel;
Lack of contact between the high voltage cradle and the tip of the spark plug;
Ignition unit failure.

How to start a cold chainsaw if the spark plug channel is constantly filled with gasoline? To resolve the problem when starting the tool, use the following algorithm:

Unscrew the spark plug with a special key;
Wipe it with a clean and dry cloth;
Dry for twenty. Thirty minutes
Remove carbon deposits with a file and adjust the gap between the electrodes;
Drain any fuel remaining from the spark plug channel and dry it,
Collect everything and try to start the mechanism.

If there is no spark due to poor contact between the high voltage cradle and the spark plug tip, check the connection. The test can be done using a regular tester. If a defect is detected and removed, the chainsaw should start without problems.

If the check shows that the contact is reliable, but the saw will not start further, look for the cause in the ignition block. As a rule, a faulty unit cannot be repaired or restored. A complete replacement is needed here.

Stalls when you press the gas

If the chainsaw stalls when you press the gas, then you need to inspect the gasoline and air filters, as well as the fuel pump.

During operation, the air filter becomes severely clogged, and when you press the gas, the tool stops working. The filter is dismantled, cleaned or washed with warm water, carefully dried and only later installed back. Then disconnect the fuel hose screwed to the carburetor. Gasoline should flow out through it. The hose is cleaned or replaced with a new one if the liquid has not leaked out. The filter is in good working order and does not need to be inspected if gasoline flows fine.
The chainsaw stalls - the gasoline pump may have worn out. If gasoline flows through the walls of the pump, it means that the device has stalled because of it. This part is replaced with another.

In order for the chainsaw to start, you need to accurately find the cause of its malfunction, and then try to remove it without the help of others. If the problem is not found or it cannot be removed without the help of others, then it is better to seek help from specialists.

Sources:

https://zemlyaselhoz.ru/pily/benzopila-poulan-zavoditsya-i-glohnet-prichiny.html https://masterinstrumenta.ru/pily/benzopila-zavoditsya-i-gloxnet-prichina.html https://specmahina. ru/benzopila/partner-ne-zavoditsya.html

Finding reasons why a chainsaw won't start

Amateur and professional chainsaws. These are complex devices. The service life of their two-stroke engines, components and assemblies has its limitations. For this reason, quite reliable and expensive tools, along with cheap Chinese units, periodically break down and refuse to start. The situation when a chainsaw does not start or does not lag is not very pleasant and sometimes confuses the user. How to identify and correct the malfunction by returning the device to operation.

Identifying and eliminating obvious chainsaw malfunctions.
Checking the spark plug and troubleshooting.
Determine the availability of fuel and its reserve.
Checking the condition of fuel and air filters.
Breath testing and cleaning.
Checking the chainsaw socket.
What to do if the chainsaw will not start further?

READ How to check the stator of a saw blade

We determine the availability of fuel and its supply.

First you need to make sure that there is a fuel mixture in the tank of the chainsaw; it does not want to start, and it regularly gets into the carburetor. With a full tank, we check how the mixture is supplied through the gas pipeline. Disconnect the fuel system pipe from the carburetor and try to pump it up. In the case of a full order, when pumping, gasoline will be supplied in spurts in accordance with the standards established by the manufacturer. Poor or no fuel may result from:

The fuel supply channel is clogged;
Fuel filter clogged with debris.

Often the cause of poor starting of a chainsaw may be that the tank is too full. In this case, you should pay attention to the presence of stains under the saw cover. If it is present, look at the gasoline supply connections to the carburetor. Most often, it is squeezed out by pressure when the tank cap is screwed on and filled to the neck, which prevents the engine from starting.

The quality of the fuel mixture may also be one of the reasons why the chainsaw does not start. If, after finishing the work, gasoline is not drained for the remaining time, and the tool is left for long-term storage (more than two weeks), then the processes of compaction and polymerization of the components will begin to occur inside the tank. Which can cause carbon deposits on the piston, rings and cylinder liners. Therefore, before work, always prepare the mixture only in the required quantity.

Checking the breather and cleaning it.

Dihalnik. This is another element, due to improper operation of which the chainsaw may not start and may not linger during the sawing process. This element is located on the fuel tank cap in the area of the air hole. This is a kind of valve that prevents gasoline from leaking out and equalizes the air pressure necessary for the free flow of fuel into the carburetor.

If the blade is dirty, the working chainsaw stops, and when it starts, it refuses to start. The whole point is that air stops flowing through the hole. As a result, negative pressure (vacuum) is created inside the fuel tank, preventing gasoline from entering the carburetor.

Defining the problem is quite simple. Disconnect the fuel hose from the carburetor and see what happens to the gasoline. If it flows freely in a good stream, then everything is fine with breathing. If it is absent or it flows weakly and intermittently, then the reason

turns out. The dihatik is clogged with dirt. You can solve the problem by cleaning the air hole with a regular needle or a powerful jet of compressed air.

Checking the exhaust channel of the chainsaw.

One of the reasons that the chainsaw does not work well is that the exhaust duct or its muffler may be clogged. At the same time, a drop in power is observed in the process of sawing lumber and logs. Most often this is due to tarry deposits on the spark arrester or muffler, which are formed when burning a low-quality mixture of gasoline and oil, preventing the removal of exhaust gases.

A resonator clogged with carbon deposits can lead to poor starting of the gasoline saw.

Eliminate the cause of the chainsaw’s poor starting; in this case, you can remove the accumulated combustion products. To do this, perform a number of manipulations:

Remove the muffler by unscrewing the screws;
Remove the cooling panel and gasket;
Remove the spark plug;
Disassemble the resonator housing;
Wash all elements from carbon deposits with detergent;
Let them dry completely;
Reassemble everything in reverse order;

Checking the condition of the fuel and air filters.

If everything is fine with the quality of the fuel, the chainsaw engine may not start through clogged fuel and air filters. To diagnose these elements, it is necessary to perform a number of manipulations related to their dismantling.

For fuel filter:

Disconnect the gasoline supply line from the carburetor;
Pump up the fuel.

If there is little or no pressure in the pipe, turn off the filter. Before doing this, empty the container of the mixture and remove the filter element itself. Dismantling is done using a wire hook. The spare cartridge is clogged, which causes poor starting of the chainsaw engine

, can be cleaned, but it is better to replace it with a new one. When using the tool in dusty conditions, it should be cleaned regularly.

A clogged air filter can cause your chainsaw engine to run irregularly, making it difficult to start. Dust and dirt, which are applied to the adsorbent material, prevent air from entering the system, making the fuel mixture so saturated that it will sometimes be difficult to start the tool.

Checking the air filter. One of the first steps in finding the cause of a poor startup

Be careful when removing the air filter, as dust accumulated on the surface of the saw during operation may enter the carburetor. And this is fraught with more expensive repairs. After disconnecting the cartridge, thoroughly clean it of accumulated dirt and wash it with detergent. Dry the element and put it back in place just as carefully.

Fuel resource supply

Sometimes the saw owner forgets that he forgot to replenish fuel supplies.
The problem of fuel shortage is solved very simply - a new portion of the mixture is poured into the tool. If there is a sufficient amount of fuel in the tank, then an obstacle occurs at the stage of fuel entering the carburetor.

Checking the fuel line is carried out as follows:

The fuel system pipe is disconnected from the engine system assembly.
Paging is done manually.
The fuel supply is monitored.

Insufficient gasoline pressure is explained by one of three conditions:

Clogged channel responsible for fuel supply.
Clogged fuel filters (occurs as a result of the accumulation of debris).
Overfilled tank (if there is too much fuel, the gas line may be blocked).

Fuel supply in systematic jerks indicates the serviceability of the gas pipeline.

Expert opinion

Kulikov Vladimir Sergeevich

A symptom that indicates an overfilled tank is the presence of smudges. They are located in the space under the chainsaw crankcase cover. The detection of this symptom indicates the need to check the fuel supply pipe. Excess fuel leads to extrusion of individual sections of the wire, which impedes its passage. The lid of the barrel, which is filled to the top, does not allow the engine to start working.

Fuel quality

In addition to incorrectly pouring gasoline, the quality of the product also matters.
It falls in situations where the owner of the saw does not follow the rules for using the tool. The standard scenario includes several stages:

A chainsaw is used to process the material, after which a small amount of gasoline remains in it.
The owner of the tool does not pay attention to the remaining fuel and leaves the tool for several weeks.
The formation of resin in the tank is activated.
Over time, cylindrical cartridges become covered with a layer of charred growths.

The build-up, in turn, prevents the spark from flowing. As a result, the owner of the tool has to re-disassemble and clean the parts. This procedure can be avoided if you fill in the required amount of gasoline in advance.

If a portion of fuel still remains, you need to get rid of it. Fuel can remain in the tank without consequences for no more than 10 days.

Identifying and eliminating obvious chainsaw faults.

To determine the reason why the chainsaw will not start or is delayed when starting, it is necessary to troubleshoot the tool. The essence of the procedure is a sequential inspection of the condition and operation of the main working elements of the saw engine. At this stage we check:

Spark plug present;
Fuel supply;
Filter status;
Fan of the ventilation compartment built into the fuel cap
Exhaust channel function.

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Main types of breakdowns and methods for eliminating them

Before starting work on diagnosing faults and eliminating them, you must prepare the necessary tools.

Due to the fact that a chainsaw is a relatively simple unit, the list of accessories includes the following items:

a set of flat and Phillips screwdrivers;
open-end locksmith's wrenches;
spark plug key;
socket set with wrench
Stihl multi-tool.

Multifunctional tool

In order to qualitatively eliminate any breakdowns that occur and restore operational performance, it is necessary to determine as accurately as possible the malfunction that preceded the failure of the unit. Based on the fact that the chainsaw is equipped with an internal combustion engine (ICE), the main causes of breakdowns should first of all be looked for in the power unit.

The most common faults when repairing a Shtil 180 chainsaw include:

the engine does not start;
the engine runs intermittently, and when running for a short time, the chainsaw spontaneously stalls;
oil leaks near the chain lubrication mechanism;
the engine does not develop full power.

Frequent breakdowns of the transmission part of the saw include rupture of chain links. You can independently restore its integrity by riveting the links or replacing them with a new one.

Despite the relative simplicity of the design and the absence of complex mechanisms, experts recommend troubleshooting in a certain order. First of all, the presence of the mixture in the fuel tank is checked, and if everything is in order with the liquid level, you need to proceed to inspect the chainsaw starting unit. If this mechanism is also in normal condition, you need to check the functionality of the spark plug.

After performing the manipulations to diagnose the spark plug (determining the presence or absence of carbon deposits, the correct gap between the electrodes, the condition of the o-ring), we turn our attention to the carburetor. Due to small sawdust, dust and soil particles, the fuel system often becomes clogged.

If cleaning the carburetor of a stihl 180 chainsaw did not help restore the unit to its previous performance, the reason most likely lies in the cylinder-piston group (CPG). The power unit is one of the most complex mechanisms of the tool, the diagnosis of which requires almost complete disassembly.

Fuel system problems

The first stage of diagnosing the fuel supply system is checking the level of the fuel mixture in the tank.

The main components of the fuel system of the 180 Shtil chainsaw

Even if the owner is sure of the availability of gasoline, this makes it possible to eliminate the vacuum created as a result of a clogged bypass valve. It is designed to optimize pressure in the tank with fuel consumption. To make it easier to clean the chainsaw breather, use a regular medium-sized sewing needle.

When inspecting the fuel system, you should pay attention to the integrity of the pipes, the tightness of which may be compromised by mechanical damage or long-term operation of the unit. Sometimes the cause of mixture leakage and, as a result, incorrect engine operation, is wear of rubber gaskets and primer (choke button)

In this case, to repair the Shtil 180 chainsaw with your own hands, you need to purchase a repair kit for seals and replace them.

Problems with the starting and ignition mechanism

The cause of problems with a chainsaw of this model may be a malfunction of the ignition system and the engine starting unit.

General view of the 180 chainsaw ignition

If no deviations are detected when measuring the gap between the flywheel and the module, you need to pay attention to the spark plug. Shtil 180 chainsaw starter assembly

Shtil 180 chainsaw starter assembly

Having removed the spark plug from the shaft, we measure the gap of the chainsaw spark plug between the central and side electrodes. If its value is excessive (more than 0.7-1.5 mm), a spark may occur periodically, and if it is minimal (less than 0.7 mm), it may not be sufficient for optimal ignition of the fuel mixture.

If gasoline enters the combustion chamber, and no discrepancy in the ignition system has been identified, the likely cause of the breakdown may be the carburetor. This unit is designed to mix fuel with air and supply them to the cylinder. After dismantling the carburetor, we clean its channels and jets using universal products.

After diagnosing the ignition system of the Shtil 180 chainsaw and restoring it, we move on to finding problems in the power unit, namely in the cylinder-piston group of the saw.

What to do if the chainsaw continues to not start?

If the initial inspection did not yield anything or the defects were eliminated during the search, and the chainsaw does not start further, then you need to look for more serious reasons. It is better to identify and repair such breakdowns in a service center. However, with experience, you can find and fix it yourself. What to diagnose and check?

Compression in the cylinder;
Compression in the crankcase;
Carburetor operation.

In the first case, checking the compression in the cylinder will allow you to find out the condition of the cylinder-piston group (CPG) of the chainsaw, which does not want to start cold. For this you need a compression gauge. The device is screwed into place of the spark plug, and the engine is idling. Measuring the readings allows you to judge the condition of the CNG. In the absence of a compressor, the compression in the cylinder can be determined outward as follows:

Place your finger on the candle hole;
Try starting the chainsaw engine.

By placing your finger on the spark plug hole and pulling the starter, you can check the compression in the cylinder

If you feel that your finger is pulling strongly into the spark plug channel, then the compression is fine. The absence of vacuum in the chamber indicates a malfunction. A group of cylinder-pistons requires a more detailed inspection; it will give an idea of the condition of the piston and cylinder, piston rings and bearings.

The chainsaw may not start when cold due to lack of compression in the engine crankcase. The main reason for this. Damage to the gasket placed between the cylinder and crankcase. Detecting lack of compression is quite simple:

Disconnect the top tube from the carburetor;
Pour gasoline into a regular plug;
We immerse the removed tube in fuel;
Sip the starter several times.

If fuel is sucked out of the cap when the chainsaw starter starts, then everything is fine with compression. If not, check the gasket.

If fuel is drawn in, then everything is in order. The gasket is intact. Otherwise, you will have to purchase a repair kit and replace it. How to do it? See why the Chinese chainsaw will not start:

Starting the tool may be difficult if the carburetor is not working properly or is damaged. It often happens that during the sawing process the mounting screws become loose and air is sucked into the cylinder. Check that the carburetor is securely fastened. Check this for fuel leaks. There can be many reasons for the malfunction. The malfunction can be identified, eliminated and the carburetor adjusted only at a service center.

Having carried out step-by-step troubleshooting of the chainsaw engine

, you can find the problem, fix it yourself and successfully launch your working tool. DO NOT take on jobs you are not confident in. Entrust troubleshooting to service center specialists.

Sources:

https://benzopilok.ru/remont/benzopila-ne-zavoditsa.html https://gardenzoom.ru/pochemu-ne-zavoditsya-benzopila.html

Summing up

When the first signs of improper operation of the chainsaw occur, it is worth carrying out a full diagnosis. To avoid damage to the saw as a result of improper maintenance, it is better to entrust the work of identifying and eliminating motor defects to experts. And most importantly, you should not use a chainsaw with minor shortcomings, because this will lead to even huge dilemmas.

A clogged muffler is a common cause of a breakdown, in which the chainsaw starts and immediately stalls. To eliminate the malfunction, it is necessary to dismantle the muffler, clean it from carbon deposits using sandpaper or a special chemical solution. If the chainsaw model is non-separable, chemicals are poured into the system and remain there for several hours, then it is purged.

The carburetor needs to be adjusted if the chainsaw stalls at idle. Precise setup is a rather labor-intensive process, so it is usually done in service centers. But, on some models there are elements for this option; just turn the bolt half a turn to increase the speed of the chainsaw, the problems will be eliminated. If the jets, injectors, channels and filters are clogged, you need to disassemble and clean the entire carburetor. When oil seals, gaskets, and cuffs wear out, they need to be replaced to prevent air leaks.

If problems occur with the fuel or air filter, you need to change the fuel pump or clean the air filter.

If the breather is clogged, you need to clean it with an ordinary needle.

When a chainsaw starts and immediately stalls, the reason may lie in the incorrect operation of the chain. To eliminate problems, check the presence of oil in the tank for lubricating the chain, as well as the oil drain tube for ruptures or blockages.

When inspecting the piston group, you should pay attention to the cylinder and, if necessary, change it or the piston. You can bore the cylinder to fit the dimensions of the new piston. If the piston and cylinder are normal, you should pay attention to the shortcomings of the piston rings and the need to replace them.

In addition to everything else, you should keep under control the service life of the parts indicated in the product passport, which include the drive sprocket, tire, chain, part of the anti-vibration system, and it is time to replace them.

If you use the tool for a long time, it is worth checking the condition of the fuel line. If the tube is cracked, you will have to replace it with a new one.