Stihl 180 does not start, there is a spark, stihl ms 180 fills the spark plug

Chainsaw starter device, spring installation

The chainsaw starter structure is shown in Figure 1. This spare part includes the following elements:

• drum;
• cable;
• starter handle;
• frame with return spring.

Most modern chainsaw manufacturers use standard starter designs. The essence of the starter's work is as follows:

• a trigger cord passes through the handle; when the handle is raised sharply, the cord is pulled out;
• the movement of the cord sets the ratchet drum in motion;
• this drum makes the other one, located on the shaft, move;
• The crankshaft makes several revolutions during the above movements, the fuel mixture is compressed, a fire occurs and the chainsaw begins to work.

Figure 1. How a chainsaw starter works.

The sequence for installing the chainsaw starter spring is:

• twist the spring to the desired diameter and place it in the body;
• then we fix the spring on the peg with the outer end so that the end of the spring is directed to the center;
• insert a screwdriver into the hole in the drive disk, find the loop on the spring and lower the disk;
• check that the end of the spring is in the right place;
• We insert the dangling starter cord into the groove and twist it so that the cord does not dangle and the spring is tensioned.

Factory springs go on sale already twisted and fixed with wire. Such springs are simply inserted into the groove, then the wire is cut and the spring takes its proper place. More information and a visual example of spring assembly can be obtained by watching the following videos:

How to assemble a chainsaw starter spring:

How to tension a chainsaw starter spring - video from a specialist:

Checking the fuel system

First you need to check the condition of the fuel filter. To remove it, you need to unscrew the fuel tank cap. Next, aluminum wire with a bent end will come to the rescue. With its help, remove the fuel hose, at the end of which there is a filter.

Chainsaw device Shtil 180

The condition of the filter can be checked by blowing into it. If air does not pass through, then the filter needs to be cleaned or replaced. If air flows freely, you need to look for a blockage in the fuel hose by disconnecting it from the carburetor. The blockage can be cleared mechanically or by replacing the hose.

If the fuel hose and filter are clean, but fuel does not flow to the spark plug, the cause may be a malfunction in the air pulse supply to the fuel pump.

Pro recommendations for controlling the working mixture

If the checks performed did not give the desired result, we proceed to checking the ignition. A wet spark plug that is turned out indicates an excess of fuel and a lack of air; the mixture that floods the spark plug during startup cannot even be ignited in such a proportion by a powerful spark.

To bring the quality and quantity of the air-gasoline mixture to the optimal setting, a wide range of operational adjustments is used. The cause of fuel overflow in old chainsaws may be a leak in the fuel supply valve and the carburetor float valve.

In standard situations, after a short period of purging the cylinder with the spark plug removed or the decompressor turned on, normal starting is completely restored.

Main settings

Any candle has unique characteristics that must be taken into account when purchasing this consumable. The most important of these parameters are indicated in the instructions for the tool and in the labeling of the product itself. The main characteristics are considered to be:

• the gap that separates the electrodes;
• diameter and thread pitch;
• thread length (candle skirt or shirt);
• material from which the head electrode is made;
• heat number.

In addition, from the markings you can find out information about the manufacturing company, design features (number of electrodes), the presence of a built-in resistor and the height of the insulator.

Each of these parameters will help the owner of a tool or device with a two-stroke engine to select an adequate replacement for a failed original spark plug in cases where such a model is not available in specialized stores.

Do I need to adjust the carburetor?

Many consumers do not consider chainsaws to be innovative equipment used only by specialists. Many summer residents and ordinary home craftsmen have such a tool. After all, a chainsaw is used as a convenient replacement for an axe, especially since manufacturers offer customers a variety of models of units at a very affordable price.

Since the design of the device is quite simple, if desired, anyone can figure out why the chainsaw does not start, taking into account the advice of experts.

Business interruptions

To restore the operation of the saw, no matter the Ural or Shtil brand, you need to know the location of the breakdown. First we check and change the unsuitable fuel mixture

If the saw still does not start, then we check further point by point

First, we check and change the unsuitable fuel mixture. If the saw still does not start, then we check further point by point.

The problem is in the candle - we pull it out and dry it. Under no circumstances should you pierce it, as this will lead to a malfunction of the part. Fills a spark plug on a chainsaw: what to do? 30 minutes after drying, you can insert the spark plug back, first checking to see if there is any fuel left in its place.

The chainsaw is no longer considered an innovative technique intended exclusively for professionals. Nowadays, many summer residents and owners of personal plots have a similar universal unit in their arsenal. After all, modern manufacturers offer customers a wide selection of types and models of units of this kind.

If equipment of this type is provided with proper use and maintenance, spark plugs for Stihl chainsaws rarely become unusable. But if one day the chainsaw does not start, you need to figure out the problem in order:

A spark plug for a chainsaw is an important part for units of this kind. If problems arise with it (for example, it floods), they can lead to breakdown of all equipment; If, upon inspection, the chainsaw spark plug feels completely dry to the touch, this indicates a lack of fuel supply. Why is this happening? The salt of the problem is concentrated in the carburetor. Be sure to clean the fuel filter and turn the engine back on. Nothing happens? Then the carburetor needs to be disassembled and examined, but it is better to entrust this matter to specialists from the service center; If the unit does not start, then this may indicate a problem with the spark plugs of a different nature - it is flooded. Your chainsaw is calm: the spark plug is flooded and the engine of the unit does not start? To fix the problem, remove the flooded spark plug and dry it thoroughly. At the same time, it does not need to be heated. It is enough to drain the fuel mixture from the spark plug hole and leave the part to dry for half an hour. Next, put it back in place and start the engine.

In addition, it is important to inspect the contact between the tip of the spark plug and the high-voltage wire; It is important to ensure that the chainsaw spark plug gap is adjusted correctly.

Why does the spark plug on the chainsaw become calm? The answer is simple: this happens when the unit is started by an inexperienced user who does not follow the correct sequence of starting the equipment when cold.

Because of this, the spark plug tip may fail. To verify the presence of such a problem, unscrew the spark plug and insert it into the tip. Then place the part on the block and pull the trigger cord several times. If there is a spark, you don’t have to worry about the electrics and the condition of the spark plug.

Be sure to check that the chainsaw's spark plug gap is adjusted correctly.

A spark plug for a chainsaw is an important part for units of this kind. Why the spark plug on a chainsaw floods: reasons and. If problems arise with it (for example, it floods), they can lead to breakdown of all equipment; If, upon inspection, the chainsaw spark plug feels completely dry to the touch, this indicates a lack of fuel supply. Why is this happening? The salt of the problem is concentrated in the carburetor. These days your chainsaw is calm: it fills the spark plug and why does it fill the spark plug on the chainsaw. Be sure to clean the fuel filter and turn the engine back on. Nothing happens? Then the carburetor needs to be disassembled and examined, but it is better to entrust this matter to specialists from the service center; If the unit does not start, then this may indicate a problem with the spark plugs of a different nature - it is flooded. Let's figure out why the spark plug on a chainsaw floods, how to prevent it and how to deal with it. Your chainsaw is calm: the spark plug is flooded and the engine of the unit does not start? To fix the problem, remove the flooded spark plug and dry it thoroughly. At the same time, it does not need to be heated. It is enough to drain the fuel mixture from the spark plug hole and leave the part to dry for half an hour. Next, put it back in place and start the engine.

In addition, it is important to inspect the contact between the tip of the spark plug and the high-voltage wire; It is important to ensure that the chainsaw spark plug gap is adjusted correctly.

No spark

If the chainsaw does not start, and you have not experienced any particular difficulties before, the first thing to do is check the spark plug. There may simply be no spark between its electrodes; this can only be determined after removing the spark plug. We check its functionality; to do this, we stick the spark plug into the cap of the high-voltage wire, and place the metal side of the spark plug on the cylinder (or other metal object). Now we do several manipulations with the starter, and if during them no spark is observed, the problem is specifically in the spark plug.

Attention : you must make sure that the ignition is on, otherwise the spark plug will not show a spark in any case. Also, to make sure that it is the spark plug and not the ignition coil that is faulty, take a similar spark plug and check for a spark on it. If present, the problem can be solved by simple replacement.

Ignition coil malfunction

Repairing the ignition coil is impossible; its design cannot be disassembled. But you can only check the performance of a part with a special device. If there is no spark to the spark plug, do not immediately blame the ignition coil; carry out diagnostics. Some people mistakenly run to the store for a new reel, so first make sure it’s broken and then make a new purchase.

Supplying fuel to the chainsaw

If the Shtil 180 does not start, there is a spark, then first of all we check the presence of fuel in the chainsaw tank. Of course, the problem is funny, but quite common. Next, we check whether fuel is entering the carburetor; to do this, you can disconnect the gasoline hose from the carburetor and pump in gasoline. After several manipulations, gasoline should come out of the hose, but not in a large stream, but in small jerks. If gasoline does not flow or flows poorly, the problem may be the following:

Why does a chainsaw fill a candle?

There are several common causes of combustion chamber overfilling, but, fortunately, each of the possible problems can be eliminated without special skills. Among the current reasons for filling a spark plug are: an error during the first start, a carburetor defect or a clogged air filter. To get an extremely complete picture and understand why the spark plug on a chainsaw is flooded, it is better to familiarize yourself with a brief analysis of each problem.

Error on first launch

saw (when cold), is expressed in excessive supply of the fuel mixture after several extra rotations of the starter. Being distracted or due to inexperience, you can miss the moment of ignition and continue trying to start. Since the air damper is closed at this stage, with each jerk of the starter only the fuel mixture will enter the chamber, which will be collected without the possibility of ignition. To flood the contacts, 5-10 extra revolutions are enough, after which the engine will no longer start, even if the throttle is opened.

Carburetor defect

does not occur out of nowhere, but after prolonged storage of the tool without draining the fuel. The mixture of gasoline and oil begins to disintegrate already in the first month, reacting with the miniature components of the mechanism that it envelops. First of all, the membrane becomes rough, disrupting the rhythm of its work. The axis of the float (rocker arm) becomes rough, making it difficult to tilt, and the needle tip is also eaten away, reducing the tightness. Even one of the 3 indicated defects can disrupt the operation of the carburetor system, which will not be able to restrain a moderate fuel supply.

Air filter clogged

occurs after several tens or even hundreds of hours of operation. The reason is so banal that sometimes it is overlooked when moving on to other options. Dirt clogs the pores, seriously reducing the throughput of the material, as a result of which the speed gradually drops, and with strong gas, the chainsaw choke and stall. The condition of the filter can be easily assessed “by eye” by inspecting it while removing the spark plug for inspection (they are located under the same cover).

Back to entry

I had the same problem, the new saw did not start after the 2nd fill-up, I couldn’t find anything in the advice, Unscrew the switch, look at the piston, but there is no need to do this if you feel that of course there is compression, the starting cable is pulled with force. And what remains for our client to do turned out to be outrageously simple, he filled the candle and for lack of experience. We drain all the gasoline from the barrel. We unscrew the spark plug, check the spark, then you need to drain the remaining gasoline from the cylinder, for this purpose we turn the cylinder upside down and gently pull the starting cable, draining the excess approximately 10 times. Then I put the saw in the same position for 5 minutes for ventilation and drying, and tighten the candle. We fill the tank with gasoline and oil in the indicated proportions. I put the lever into cool start, pulling it twice smoothly with the 3rd jerk, and it started on the third jerk. And I was already planning to take it to the service center.

The same problem, the saw was new, and at the 2nd gas station it wouldn’t start. I checked that the carburetor was overfilled, the spark plug was in the gasoline, and after drying, a spark appeared. After purging the cylinder, as described in the instructions, I tried to start it. When the damper is in the “Cold Start” position, there is one flash; when I move the damper to the start position, it doesn’t start. I unscrewed the spark plug and it was filled with gasoline again. I blew it with the starter a hundred times, same problem. And so, having gone to your website, read Oleg’s advice (regarding blowing with the starter in an inverted position of the saw), I tried it, and 10 grams of gasoline poured out of the cylinder and carburetor. Then, attaching the spark plug (without wrapping it) to the tip, set the damper to the starting position and blew some more air. Assembled, fueled, and started. So thanks to Oleg for the good advice!

Calm 180 fills the candle cause.

"MASTER PLUS" repairs of any complexity in Serov

Video: Filling a Candle on a Stihl Chainsaw

Heating of the spark plug is facilitated by the use of heat-resistant motor oils for 4-stroke engines, extensive wear on the compression rings or the entire piston group as a whole.

Troubleshooting Tips

In the first case, the problem is solved by bringing the air intake device into proper condition. It is recommended to blow out the counter-flow air filter and replace it at best. Methods for cleaning other types of filters are listed in the included operating instructions.

• The carburetor is set to the engine warmed up to operating temperature. The power supply is set to optimal mode by rotating the adjusting screws for the quantity and quality of the mixture. The success of the work is determined by knowledge of the design of the fuel supply system and the interaction of all components.
• In particular, the complexity of adjusting carburetors with built-in compensators and other automatic control devices increases. Such equipment is configured using special equipment equipped with service and repair centers.

If the engine cannot be adjusted, excess fuel in the emulsion may be caused by a leaking valve or a frozen carburetor float.

The final result of the work performed:

• quick turn;
• stable idle;
• restoration of traction parameters;
• no smoke or noisy noise.

Criteria for the selection and operation of spark plugs

The simplest indicator of mixture quality is the porcelain insulator of the central electrode of the spark plug. Any shade of brown indicates normal mixture quality; white or smoked insulator indicates a poor or over-rich emulsion composition.

The quantity of the heated candle must meet the specified requirements.

• The cause of lubrication may be a so-called “cold” spark plug, which can be visually identified using a short insulator. Violations in sincerity are possible if the gap is incorrectly adjusted or the contacts burn out naturally.
• The recommended distance between the spark plug contacts is indicated in the instructions; in the absence of information, you can focus on the standard value of 0.7-1 mm. With a smaller gap, the ignition efficiency of the air-fuel emulsion decreases, and the gap increases possible interruptions in the formation of sparks.
• Smoking a wet or greasy candle over an open flame is not recommended due to the risk of cracking and premature failure.

Re-enrichment of the mixture in the combustion chamber with a technically reliable chainsaw is eliminated by an engine explosion. To do this, simply turn off the spark plug and turn the crankshaft several times using the recoil starter.

Mechanical jamming of the piston or crank mechanism

This malfunction occurs due to the piston sticking in the cylinder or the destruction of the crankshaft bearing. This happens when the engine overheats or runs on pure gasoline for a long time.

In the first case, it is recommended to cool the power unit, and then pour a few drops of engine oil into the spark plug hole. In most cases, the engine can be wedged, but the consequence of this incident may be the appearance of scuffing on the piston. The tack is not reflected on the chrome surface of the cylinder mirror.

If the measures taken do not give the desired result, the saw must be repaired in a specialized workshop.

Stihl 180 Chainsaw Doesn't Start Floods Spark Plug

Household and professional chainsaws have a simple design and reliable, two-stroke internal combustion engines. Most drive failure is due to fuel system problems. Why light a candle on a chainsaw and how to fix it yourself?

The components of the entire line of gasoline power units operate on a precisely measured mixture of fuel and special motor oil designed to operate two-stroke engines.

In the carburetor, fuel and air are mixed in a ratio of 1:16, after which the air-gas emulsion is supplied to the combustion chamber.

Consequences of running an engine with untuned fuel equipment

The traction characteristics of the engine and its life expectancy depend on the composition of the mixture.

• Working on a lean mixture causes a drop in power, overheating of the cylinder and intense wear on the parts and components of the chainsaw.
• Working on a saturated mixture is no less dangerous. The malfunction manifests itself in an increase in the time it takes to reach operating speed, an increase in fuel consumption, and smoke from the muffler.
• There is also intense formation of soot in the combustion chamber and loss of mobility of the piston rings.

Algorithm for determining the causes of poor mixture formation

In any case, a wet spark plug on a chainsaw indicates a pronounced imbalance in the composition of the air-fuel emulsion. Even with a fuel to air ratio of 1:14, spark wear conditions due to lack of air prevent the normal combustion of the air-fuel emulsion compressed in the combustion chamber.

The main reasons for enriching the mixture in most cases are standard:

• the intake air filter is clogged;
• incorrect carburetor adjustment;
• interruptions in the ignition system;
• Low quality gasoline and transmission failure are also possible.

Risks of using low-quality fuel

Various low-octane gasoline and fuel substitutes contain alcohol components that take longer to burn completely. The effectiveness of such fuel is questionable, since there are a number of factors confirming ineffective operation and forced wear of the engine.

Is there fuel in the tank and what is its quality?

Checking the presence of fuel in the tank is the first place to start diagnosing. Even if there is visually still fuel in the tank, make sure that the fuel line is lowered into it. If the fuel in the tank is low, then this is the main reason why it is impossible to start the engine. After adding fuel to the tank, it is necessary to bleed the system, and only after that carry out a test run of the engine.

If there is enough fuel in the tank, make sure that the supply hose inside the tank is not disconnected. On some models of chainsaws, such a malfunction is a “disease”. If the tank is full, this does not mean that the breakdown is not related to the fuel system. Check the quality of the fuel (oil and gasoline). Gasoline for chainsaws is mainly used of the AI-92 grade. As an oil, you need to use only a special two-stroke oil, but not motor oil or even waste oil.

The prepared fuel mixture cannot be stored for more than 2 weeks, as the mixture begins to lose its properties, which negatively affects not only the operation of the engine, but also its starting. How does a poor-quality mixture affect engine starting, you ask? Everything is very simple, when the mixture is stored for a long time, oil precipitates, which leads to clogging of the carburetor channels and jets.

The instructions for each brand of chainsaw indicate recommendations on the ratio of gasoline to oil. This is the recommendation that should be followed when preparing a mixture for a two-stroke chainsaw engine, otherwise it will significantly shorten the service life of your tool.

Start according to instructions

Different models of chainsaws have their own starting features and their own mechanisms. We will look at the device startup algorithm using the example of the popular Stihl MS 180 chainsaw model.

Before starting the startup process, it should be noted that the instructions for some chainsaw models state that before starting the tool, you should apply the emergency stop brake to ensure additional safety. But with a fixed brake, starting will be more difficult. Accordingly, it will be better to unfix it.

If you do everything correctly, then nothing will be difficult. If you are worried that without fixing the chainsaw at the moment of starting it will cause harm, then it is better not to take risks at all and not get to work. So, the algorithm for launching the Calm tool is as follows:

• Before starting to wind the tool, the damper adjustment lever should be moved to the lower position. Remember that it moves all the way down on the saw only when the gas button is pressed. Press the gas button and move the lever down. This will close the carburetor valve and lock the gas in the pressed position;
• Next, vigorously pull the starter handle until you hear the characteristic sound of an attempt to start the tool. It should stall immediately. Then the damper position adjustment lever is moved one step up;
• In this position, pull the starter handle again until the saw starts. And if it starts, then due to the fact that the gas handle is fixed pressed, the work will take place at high speeds;
• Then press and release the gas button once so that the throttle adjustment lever automatically assumes the operating position and the speed decreases;
• If it is necessary to put a heated chainsaw into operation, you need to put the lever in the working position and then start it;
• To stop the machine's engine, the throttle adjustment lever must be moved to the up position.

Briefly about the main thing

This model is the pride of the German manufacturer and is a direct tool intended for minor work. It can be used for no more than twenty hours per month. This wonderful device will easily help you take care of your garden, prepare firewood for the winter (see how to cut down a tree), clear areas, and will also be an indispensable assistant in other areas of, let’s say, simple manipulations.

We can say that these are mini-model chainsaws, since they have a small weight, which is 3.9 kg , and they do not have a large mass of both oil and fuel tanks. The manufacturer has equipped this device with a two-stroke engine with sufficient power for light work.

Moreover, it is quite quiet since during operation the noise level does not exceed 98 dB. So to better understand the level of loudness itself, just compare its noise with conversational speech, which has an indicator of 76 dB.

How to adjust the spark plug gap?

Ideally, this is done using a template that you can choose from:

• acquire;
• make it yourself using thick plastic.

Ideally, the gap between the electrodes should be about 0.5 mm. Try to secure the fasteners tightly before removing the template, but do not overdo it so as not to inadvertently break the fragile parts located with this assembly.

How to clean candles?

Pay attention to cleaning the spark plug (an important step in tool maintenance, as well as gap correction). If the unit is used intensively, this procedure is carried out weekly.

In another case, twice a year is enough (before the start of winter operation and the summer season).

Chainsaw spark plugs Partner, as well as spark plugs, Champion, parts of other models and brands of tools are ideally cleaned chemically. They are degreased using a solvent or acetone, and then dried (in the summer in the sun, or alternatively on a stove burner). Then the candle is treated with a 20% solution of ammonium acetate (hot liquid). If necessary, clean the spark plug using a nylon or metal brush. Finally, the part is washed and dried.

The chainsaw cuts to the side

When cutting, you may notice that the result is an uneven cut. Why does a chainsaw cut crookedly? There are several reasons:

• Incorrect chain sharpening. The teeth are sharpened at the wrong angle or only in one direction. Proper sharpening is required.
• Incorrectly selected chain. At very high speeds, a difference of even 0.2-0.3 mm between the width of the groove or the width of the seat will be visible, which is why the chainsaw cuts to the side. An appropriate circuit must be installed.
• Uneven tire wear. Over time, the tire wears out on one side and then the chain pulls to the side. Rotate the tire regularly to ensure even wear on both sides. If the wear is excessive, replace the tire.

Stihl 180 fuel system malfunctions

In some cases, as a rule, if there is a spark on the spark plug, when examining it, you can notice that it has a wet coating, this indicates an excessive supply of fuel to the combustion chamber and, as a result, the impossibility of igniting the fuel mixture.

The candle is flooded

Popularly, a phenomenon in which a spark cannot ignite a large amount of fuel is commonly called spark plug flooding. The cause of the malfunction lies in the carburetor, or in improper starting of a cold engine. If a malfunction is detected, you first need to “purge” the engine.

Engine algorithm

Important: under no circumstances should you “purge” the engine with the ignition on or near an open flame.

• Remove the spark plug;
• Turn the Stihl 180 chainsaw upside down and drain excess fuel;
• In an inverted state, pull the chainsaw starter several times (this way, under the influence of compression, excess fuel will be removed from the cylinder);
• Reinstall the spark plug and high-voltage wire cap;
• Set the engine control lever to the hot start position;
• Pull the starter several times and start the engine.

If everything is in order with the Stihl chainsaw and the cold start algorithm was simply broken, then after “blowing through” it should start. Otherwise, the fault must be looked for in the carburetor.

No fuel supply

This type of malfunction, like the others, has its own characteristic symptom. It consists in the fact that the working spark plug, which has a spark, will be completely dry. You can check for suspected lack of fuel supply using the following algorithm.

Algorithm for checking for lack of fuel supply

• Unscrew the spark plug;
• Using a syringe, pour 1-2 cubes of fuel mixture into the spark plug hole;
• Install the spark plug and put on the cap of the high-voltage wire;
• Set the engine control lever to the hot start position;
• Pull the starter several times.

If, after several movements of the starter, the Shtil 180 chainsaw starts up and immediately stalls, then the suspicions of a lack of fuel supply have been confirmed and you can begin further diagnostics of the fuel line.

Fuel line diagnostics

As a rule, diagnostics of the fuel supply system begins with checking the condition of the fuel filter. To do this, you need to unscrew the tank cap and, using an aluminum wire bent at the end, remove the fuel hose from the tank with a filter at the end.

Having taken out and dismantled the filter, you can try to blow into it; if air does not flow, then the problem has been found. If everything is in order, you next need to check the system for blockages.

To check the fuel supply hose, you need to disconnect it at the place where it connects to the carburetor, and then blow into it. A clogged hose can be cleaned mechanically; if this is impossible, replace it with a new one.

In the case where the supply hose and fuel filter are normal, but no fuel supply is observed, the reason may be a malfunction of the air pulse supply to the fuel pump.

Checking the pulse from the crankcase

The fuel pump on the Shtil MS 180 chainsaw is installed directly in the carburetor and operates under the influence of impulses from the engine crankcase of the Shtil 180 chainsaw. The impulse is transmitted through a pulse channel in the rubber pipe connecting the cylinder to the carburetor.

A clogged channel can lead to problems with fuel supply or its complete absence. To check the pipe, you need to remove the air filter housing and carburetor, and then use a thin metal wire to check the channel for blockages.

Another reason associated with the lack of impulse in the pipe channel is depressurization of the engine crankcase, which results in air leakage from it and a decrease or complete cessation of its supply to the fuel pump. The result of depressurization is partial or complete loss of functionality of the fuel pump. To check the tightness of the crankshaft seals, and indeed the crankcase of the Shtil 180 chainsaw, a special vacuum gauge is used, and since it is a special-purpose tool, it is mainly available only in service centers. The question arises, what to do?

General information

The characteristics of this saw are a source of pride for the German manufacturer. At the same time, the unit is a tool that is designed to perform a small amount of work. The tool is positioned for domestic use, which confirms the intensity of its use, which should not exceed 20 hours per month . Having such a unit at your disposal, it will not be difficult for you to maintain order in your garden, prepare firewood for the winter, and also clear areas. At the same time, he will be able to help you in solving other problems where there is no need to perform complex manipulations.

Main characteristics

The saw in question can be considered a compact option, because its weight is only 3.9 kg. At the same time, it has a large capacity oil and fuel tank. The device performs its operating functions using a two-stroke engine, the power of which is sufficient to solve simple tasks. In addition to this, during operation this tool does not create much noise, the level of which does not exceed 98 dB . For ease of understanding, it is enough to say that human speech creates noise at a level of 76 dB.

• The Stihl 180 chainsaw has a power of 2.6 watts. In principle, this is enough, remembering that we are talking about a tool for household use.
• The capacity of the oil tank is 0.145 l, the fuel tank is 0.25 l.
• The tire provided by the design has dimensions of 350 mm, with a pitch of 0.325 inches.

Winding device

As with other saws, the carburetor plays the role of the main starting device. Looking in more detail at the carburetor that the Stihl 180 chainsaw is equipped with, it should be noted that it has a single adjustment screw. In other words, it is a kind of idle adjustment screw . In this case, the jet, which bears the full load, is motionless all the time.

In other words, the regulation is not applicable to him. In turn, there is no way to influence the full load in any way. You also need to pay attention to the factory settings, due to which the air-fuel mixture is supplied directly to the engine. Moreover, this principle remains unchanged regardless of the operating conditions of the tool.

What to do when a candle on a chainsaw fills

Before heading to the service center, it would be a good idea to try to fix the current malfunction of the spark plug on your chainsaw yourself. Of course, this is only relevant if you have “direct” hands, since, otherwise, there is a high probability of increasing the cost of repair work.

Poor quality fuel

The chemical composition of low-octane gasoline includes various alcohol components. Their complete combustion requires more time than when using high-quality fuel, and accordingly this becomes the main reason for the failure of the chainsaw spark plug.

Unfortunately, many citizens naively believe that fuel containing alcohol has a positive effect on gasoline consumption and purchase fuel substitutes. In some cases, efficiency does occur, but such fuel has a negative effect on the chainsaw engine, shortening its service life.

Incorrect start

As a rule, during the first start of a chainsaw, inexperienced men miss a “pop” when the air damper is closed and continue to pull the starter. Because of this, a large amount of fuel accumulates in the combustion chamber, but there is a critical lack of air. The spark plug is filled with excess gasoline and there is no longer any spark to speak of.

Clogged filter

Due to severe contamination of the paper filter of the chainsaw, a sufficient amount of oxygen does not enter the fuel chamber. The fuel mixture does not have time to ignite and gasoline floods the spark plug. If the filter has already exhausted its service life (this will be noticeable by its appearance), then it must be replaced. If you don’t have a new filter at hand, but you still need to work, you can try blowing the filter with a reverse air flow.

Chainsaws from different manufacturers and model ranges differ from each other. To clean or change the filter, it is a good idea to first look at the instruction manual. Well, or look there if you can’t remove the filter without prompting.

Ignition system failure

Perhaps this is one of the most difficult problems that will need to be overcome in order to continue using the chainsaw. There may also be several reasons for the malfunction here.

Incorrect clearance

For the most part, the gap on the chainsaw's spark plug should be within 0.5 - 1.2 millimeters (more accurate data should be reflected in the user manual). In order to check if this is so, you need to do the following:

1. Using a screwdriver or special keys, unscrew the bolts securing the chainsaw cover.
2. Having gained access to the flywheel and magnetic core, the clearance level is checked.
3. If it does not correspond to the characteristics declared by the manufacturers, then using a special gasket or improvised means (an ordinary A4 sheet folded several times is perfect) the required distance is set.

Ignition coil problem

To make sure that the ignition coil is working properly, you need to be able to use a multimeter. This device allows you to measure the degree of resistance of the coil. A good coil will have resistance. In a burnt out one there is a break or a short circuit.

If the coil is working properly, then the gap between the coil and the flywheel may be broken. To set it up, you need to perform a number of simple steps:

1. Dismantling the saw body and loosening the bolts that secure the ignition system. The magnet (magneto) of the flywheel must be connected to the coil itself.
2. The adjusting plate is inserted between the flywheel magneto and the coil itself. The gap should be within 0.2 mm.
3. After tightening the bolts, the adjustment plate is removed.
4. It is imperative to rotate the flywheel completely and several times (2-3 will be enough). However, it should not cling to the coil.
5. The final stage is assembling the chainsaw body.

Carburetor adjustment failure

Often the spark plug on a chainsaw is flooded due to improper operation of the carburetor. For greater clarity, we recommend watching this video

If this is your first time setting up a carburetor yourself, pay attention to the following factors:

1. The presence of built-in compensators and other automatic control elements makes adjustment impossible without special equipment. In this regard, you will have to contact a specialized service center.
2. If there is no proper effect from adjusting the carburetor, the cause of flooding of the spark plug will be a stuck float or a lack of tightness of the valve.

How to check the performance of the fuel pump

There is a membrane in the pump body, which during movement ensures the supply of fuel to the carburetor and engine. If the Stihl MS 180 chainsaw does not start, the diaphragm may have ruptured. You can check its integrity by removing the pump cover. If any defects are found during the inspection, the membrane is replaced.

Chainsaw repair Shtil 180

Related video: STIHL saw does not start - reasons

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Other reasons and solutions

If the chainsaw still does not start and the reason is not in the above details, you need to look deeper. Other common faults include:

Fuel pump failure;

Lack of impulse in the pipe channel from the engine crankcase;

There is no fuel supply from the carburetor;

Diaphragm rupture on the fuel pump;

Repair of the above faults can be carried out either independently, but of course it is better to give the chainsaw to a specialist; you can do the diagnostics yourself. When diagnosing, you should also check the following indicators:

Correct operation of the carburetor;

Optimal compression in the cylinder;

Compression in the crankcase.

Compression is checked both using a special device and manually. To “by eye” verify the presence of compression, simply remove the spark plug and insert a finger into the cylinder hole. Then crank the starter several times and if your finger is pulled into the hole, there is compression.

Video

What to do if the spark plug is flooded on the chainsaw

If you suspect a flooded spark plug, you need to inspect it. Using a spark plug wrench, it is unscrewed and carefully examined. If the spark plug is wet, but there is a spark, then it has definitely been flooded.

Many experienced owners are able to determine with a high degree of probability the current condition of a candle by its color. It is recommended to carry out this procedure regularly.

1. Light brown soot is exactly what all owners want to see. In this case, the functionality of the chainsaw is not impaired.
2. Black carbon deposits indicate an unbalanced mixture, namely a lack of oxygen in the fuel chamber. If the situation does not improve, there is a high probability that the chainsaw spark plug will flood again.
3. If corrosion is detected on the fork or the distance between the electrodes is too large, then most likely a lean fuel mixture is used.

Consequences of flooding

The element responsible for igniting the fuel mixture is the spark plug. It consists of a housing and a central electrode. A side electrode is welded to the “skirt” of the part, which has an electrical connection with the “ground” of the car. Due to the presence of a ceramic insulator, the electrodes do not have contact with each other. High voltage applied to the spark plug contact leads to breakdown of the air gap. A spark jumps between them.

The main condition for spark formation is the absence of an electrical bridge between the electrodes. If the spark plug is wet, a circuit with low resistance is created. This leads to a sharp drop in voltage due to leakage to the housing.

If the chainsaw does not start after a long rotation of the manual starter, then there is a high probability of the spark plug being flooded. The wet candle is wiped with a clean rag and blown with air. It is not recommended to ignite it over fire, because... this leads to the formation of microcracks on the insulator. After cleaning, the functionality of the element is checked. If there is a spark, then it is installed in place and the engine is started. If there is no spark on the spark plug, then it is replaced with a working one.

What to do?

It is important that there may be no spark on the chainsaw due to a malfunction of the fuel system. In order not to look for a problem in the working ignition, this issue must be dealt with immediately. The carburetor of a chainsaw can “overflow”, that is, throw too much fuel into the combustion chamber

Inside the candle there is a porcelain insulator from which a metal core emerges. On it, under the plate, they make contact with the “ground” (minus) and a spark occurs. We also recommend reading the article about setting up a carburetor on a chainsaw with your own hands. If a gasoline saw starts and stalls, then read here. If it doesn't start at all, then here

The carburetor of a chainsaw can “overflow,” that is, throw too much fuel into the combustion chamber. Inside the candle there is a porcelain insulator from which a metal core emerges. On it, under the plate, they make contact with the “ground” (minus) and a spark occurs. We also recommend reading the article about setting up a carburetor on a chainsaw with your own hands. If a gasoline saw starts and stalls, then read here. If it doesn't start at all, then here it is.

If the space inside the spark plug between the round insulator and the ground is filled with excess fuel, especially together with conductive contamination, a short circuit (spark) may jump inside the spark plug. There will be no spark where needed.

However, if there is no spark on the chainsaw, the fuel does not burn, and the spark plug simply must be wet from the fuel when the carburetor is running. It is almost impossible to determine visually whether a spark plug is over-filled and therefore there is no spark, or not over-filled. Therefore, to accurately diagnose this “key point” (the carburetor or ignition is faulty), you need to have 2-3 guaranteed serviceable spark plugs on hand.

1. A working candle is placed.
2. The spark is checked.

If there is a spark, it means one of two things:

• the old spark plug was faulty;
• The old spark plug was fine, but was filled with fuel.

The working spark plug is screwed into place and they try to start the engine. If it starts working normally, the problem is solved. If not, turn the spark plug out again and look for a spark. There is no spark - install the next dry working spark plug.

How to change the piston on a Shtil 180 chainsaw

If you want to replace an old piston and install a new one, you should know how to do it correctly and follow a certain method of action. You also need to have a small slotted screwdriver, a special combination Stihl wrench, a power screwdriver, a hammer, a drift made of soft material, a compressor and a stopper for the Stihl piston.

When starting work on replacing the piston, or the piston group assembly, the chainsaw needs to be cleaned of contaminants with maximum quality. Further, the work is carried out according to the following method:

1. The top cover is removed from the saw and the spark plug is turned out.
2. The side cover is removed.
3. Using a power screwdriver, remove the stopper from the shock absorbers of the chainsaw, after which its handle is disconnected from the body.
4. Next, you need to remove the driven sprocket and starter.
5. Install the piston stopper into the spark plug hole and unscrew the flywheel mounting nut and clutch.
6. Remove the flywheel, clutch and worm drive mechanism for the oil pump, which is located behind the clutch.
7. Unscrew the two screws securing the carburetor and air filter. Remove the filter, engine control lever and Shtil carburetor.
8. Remove the ignition coil and muffler.

https://www.youtube.com/watch?v=pbnRk-xzCIE

With the engine removed, the pan is unscrewed and removed, after which the piston assembly with the crankshaft is removed from the engine.

If you need to replace an old piston and install a new one, you should know how to do it correctly and follow a certain method of action. You also need to have a small slotted screwdriver, a special combination Stihl wrench, a power screwdriver, a hammer, a drift made of soft material, a compressor and a stopper for the Stihl piston.

When these operations are completed, you need to additionally clean the saw from dirt, then turn it upside down and unscrew the four screws securing the motor to the body of the chainsaw. After unscrewing the screws, the engine is separated from the body and cleaned again.

If such operations are carried out, you need to additionally clean the saw from dirt, then turn it upside down and unscrew the four screws securing the motor to the chainsaw body. After unscrewing the screws, the engine is separated from the body and cleaned one more time.

Back to entry

I had the same problem, the new saw did not start after the second refueling, I couldn’t find anything in the advice, Unscrew the switch, look at the piston, but there is no need to do this if you feel that there is compression, the starting cable is pulled with force. But everything turned out to be outrageously simple, I filled the candle because of inexperience. We drain all the gasoline from the barrel. We unscrew the spark plug, check the spark, then you need to drain the remaining gasoline from the cylinder, to do this we turn the cylinder down and gently pull the starting cable, draining the excess about 10 times. Then I put the saw in the same position for 5 minutes for ventilation and drying, and tighten the candle. Fill the tank with gasoline and oil in the specified proportions. I put the lever in cold start, pulling it twice smoothly with a third jerk, and it started up on the third pull. And I was already planning to take it to the service center.

Same problem, got a new one, and stopped starting at the second gas station. I checked that the carburetor was overfilled, the spark plug was in the gasoline, and after drying, a spark appeared. After purging the cylinder as described in the instructions, I tried to start it. When the damper is in the “Cold Start” position, there is one flash; when I move the damper to the start position, it doesn’t start. I unscrewed the spark plug and it was filled with gasoline again. I blew it with the starter a hundred times, same problem. And so, having gone to your website, read Oleg’s advice (regarding blowing with the starter in an inverted position of the saw), I tried it, 10 grams of gasoline spilled out of the cylinder and carburetor. Then, attaching the spark plug (without wrapping it) to the tip, set the damper to the starting position and blew some more air. Assembled, fueled, and started. So thanks to Oleg for the good advice

!

Source

What to do if the spark plug is flooded on the chainsaw

If you suspect a flooded spark plug, you need to inspect it. Using a spark plug wrench, it is unscrewed and carefully examined. If the spark plug is wet, but there is a spark, then it has definitely been flooded.

Many experienced owners are able to determine with a high degree of probability the current condition of a candle by its color. It is recommended to carry out this procedure regularly.

1. Light brown soot is exactly what all owners want to see. In this case, the functionality of the chainsaw is not impaired.
2. Black carbon deposits indicate an unbalanced mixture, namely a lack of oxygen in the fuel chamber. If the situation does not improve, there is a high probability that the chainsaw spark plug will flood again.
3. If corrosion is detected on the fork or the distance between the electrodes is too large, then most likely a lean fuel mixture is used.

The role of the spark plug

The spark plug in a Stihl chain engine, or any engine, is a simple device. Every time the engine flywheel completes a revolution, the magnet attached to it induces an electric current in the static magnet. This current generates a spark through the plug's electrodes. The spark ignites the fuel-air mixture in the combustion chamber, which moves the piston and makes the engine run. If the plug electrodes are spaced far apart or are covered with oil, carbon deposits, the spark is intermittent or weak, resulting in incomplete combustion and poor engine performance.