Why the trimmer won't start: causes of the malfunction and how to fix them

While caring for their garden plots, summer residents periodically encounter the problem that the lawn mower does not start. There are many reasons for tool failure. To correctly diagnose the problem, the owner of a useful unit at the dacha needs to know the structure and operating principle of its individual parts.

Since a gasoline trimmer is a complex device, you must carefully study the operating instructions before starting work. Very often they simply ignore her, or get to know her superficially. As a result, when the tool stalls or refuses to start, the question arises: “Why won’t the lawn mower start?” A long seasonal break in work, improper storage and untimely maintenance of the trimmer will cause a lot of trouble for the summer resident to eliminate the causes.

How to prevent sudden breakdowns during operation of the trimmer?

To ensure that the unit is always in functional condition, you should follow a few simple rules:

1. Conduct timely, regular technical inspection of the main mechanical components of the device.
2. Refill the trimmer exclusively with fresh fuel, the quality and origin of which is beyond doubt.
3. After each use of the tool, check whether oxides and carbon deposits have formed on the surface of the ignition system elements.
4. Avoid heavy load on the trimmer during work.

In order for the unit to remain in working condition, it is necessary to properly prepare it for storage during the winter. First of all, you should completely disassemble the tool, and then rinse and clean the components

It is also important to inspect the functional blocks for damage, if necessary, eliminating deformations of parts, all kinds of distortions, and tears in materials

When storing the trimmer, it is worth filling the gearbox with a sufficient amount of oil. Then you need to clean the air filter, partially disassemble, blow out and wash the engine of the unit. After drying all the mechanisms, you should lubricate the moving elements. To treat the piston system with oils, you must first remove the spark plug. Then you need to move the piston to the extreme position, then pour a small amount of oil into the spark plug hole and scroll the crankshaft. If you store gasoline

The trimmer is not planned to be in the house during the off-season; it is recommended to tightly wrap the engine of the unit with an oiled rag. This will avoid the development of corrosion on the surface of important components of the mechanism.

The question of how to start the trimmer if the trimmer does not start or starts poorly will arise if the engine of the gasoline trimmer is worn out, unadjusted, or when, due to a violation of the sequence of operations when starting the engine, a lot of fuel got into the combustion chamber (when the engine was “sucked”). To help the engine start, you can pour a little fuel into the cylinder through the spark plug hole. For this, it is better to use a special starting fluid, but you can also use regular fuel from the tank of the trimmer or lawn mower being started.

Checking filters

Another common reason why the trimmer will not start is if there is a clog in the filter area. To confirm your guess, it is enough to dismantle the indicated block and try to start the unit without it. If the trimmer engine starts, most likely you will have to replace the air filter or at least thoroughly blow out the old one. If there is heavy contamination on the surface of the filter element, it is necessary to use a new mesh. When resorting to such actions, you should not leave the suction pipe completely without a filter. After all, haste in this case can lead to the need to repair the entire piston group of the unit’s engine.

Often, the engine of branded trimmer models stalls as a result of a clogged breather. The main task of this component is to equalize the pressure in the fuel tank. Why the engine won't start: 2 Why the gasoline trimmer won't start. (Patriot). If the unit becomes dirty, a vacuum is formed here, which significantly complicates the supply of fuel. The problem can be resolved by cleaning the breather using a regular sewing needle.

A new chainsaw or gas trimmer (motor cutter) may not start.

Another example, when the fuel mixture is pumped over, turn the chainsaw over so that the muffler is at the bottom. The mixture may begin to drip from it. This is also the reason when the chainsaw does not start. When starting, exhaust gases are visible, but do not bleed, the saw will start after a while.

The next day, a chainsaw or brushcutter, if stored in a warm, damp place, usually starts from the working position, try it. Failed to start, then do everything according to science starting with a cold start.

Fuel filter in the tank. We need to check its functionality. But don't leave the inlet pipe without a filter.

It also makes sense to check the air filter. You need to remove the air filter and try starting it without it. If it starts, you need to either clean and rinse the old filter, or install a new one.

There are two more tips from experienced users of inexpensive brush cutters:

The brush cutter starts easier if you put it on its side with the air filter facing up so that the mixture obediently falls down into the carburetor, and you can also remove the air filter, drop 1-2 drops of the mixture into the carburetor, put the filter in place and. oh miracle. Starts up!

If it fails to start again, then you should unscrew the spark plug and dry the combustion chamber. At the same time, check the spark plug for functionality. It can fail unpredictably. One of the annoying reasons is a non-functioning spark plug.

So, the spark plug turns out to be working. What are we doing? If the warranty period has passed, you have no desire to travel far to service, then you can still take some steps to revive the tool yourself.

If there are no traces of the mixture on the spark plug, the spark plug is dry, which means the mixture is not entering the engine cylinder from the carburetor. But it’s still worth checking the spark plug’s operation once and for all. Pour a little mixture directly into the cylinder and screw on the candle. We make several attempts at establishment. There is no need to pull the winding handle as far as it will go, otherwise you will break the starter mechanism ahead of time. With a working spark plug, the engine will start, run for a bit and then stall - this is correct. This means the carburetor is not allowing the mixture to pass through.

It happens that to save money, a user buys gasoline somewhere cheaper. At such gas stations, water may get into the gasoline. This is the gasoline they sold you.

Either the gasoline or the mixture was stored for some time in a container with an open lid at high air humidity, or even a drop of water got into the mixture. One small drop of water in the carburetor is enough to disrupt its smooth operation.

If the user also tries to save on fuel additives (oil for 2-stroke engines), then the situation worsens, since such oil is less soluble in gasoline. In the carburetor, a thin film forms on the fuel filter in the carburetor. The supply of the mixture is severely limited or stopped.

The carburetor in brush cutters and chainsaws is a very delicate mechanism. It must be carefully removed from the engine and disassembled. We disassembled it in a low-dust room, blew it out, dried it, and washed the fuel filter mesh (very carefully!) if it was dirty. For gasoline vehicles with a service life of 1-2 years, this is often enough; all that remains is to assemble and start it. We start the establishment according to all the rules of science - cold start, hot start.

But here is a universal tip for starting a chainsaw or a lawn mower and even a snow blower (if the spark plug is working, a clean air and fuel filter, a fresh mixture of gasoline and oil in the appropriate proportions) - close the carburetor air damper, 2-3 movements of the starter, open the carburetor air damper (fully ), 2-3 starter movements. So repeat. After 3-5 cycles it will start to start.

There is a spark, the spark plug is wet

First of all, it is necessary to remove the muffler and carefully inspect the piston, since this is where the problem may be hidden. but the chainsaw still does not start or stalls, the saw does not start, Partner 350. In addition, most owners wonder: why does the chainsaw start and stall, while there are supposedly no problems with the spark plugs?

But this is an erroneous opinion and you don’t need to be so sure in this case, as there are situations when the candle sparks perfectly in air, but does not work directly in the cylinder.

The reason for this may be a direct violation of a kind of compaction in the canal area (impulsive). Or so there is a peculiar development of crankshaft oil seals, but this feature occurs in very rare cases.

The Shtil ms 660 chainsaw is the most economical of the entire Shtil chainsaw line. Its price ranges from 3,100 to 5,500 rubles.

The muffler is clogged and the gas trimmer cannot be started

What else could be the reason why the gas trimmer engine cannot be started? Even before resorting to more drastic actions, you should check the serviceability of the muffler or exhaust duct. This does not apply to new trimmers, which have practically no special output. If the trimmer is already many years old, and the tool has not been subjected to diagnostic measures, then the muffler should be checked for clogging.

If the muffler on your lawn mower is clogged, there is nowhere for the exhaust gases to escape, making it impossible to start the engine. The exhaust channel cannot become clogged overnight, so the following signs should have appeared the day before:

1. An increase in the sound of the engine, which is associated with overcoming great resistance by the exhaust gases to release them
2. Black smoke from the muffler is carbon deposits that settle on the walls of the exhaust system
3. Unstable engine operation
4. The engine stalls on its own when idling

This factor can be excluded or confirmed by inspecting the exhaust system. If the anti-spark mesh is significantly clogged, then undoubtedly the reason for the inability to start the engine lies in the exhaust channel. The mesh must be cleaned, but this must be done carefully, since black soot is a very dangerous carcinogen that can cause serious diseases of the human respiratory system. To clean the anti-spark mesh and the walls of the trimmer muffler, special products should be used, and work should be carried out using protective equipment.

What resource does a Chinese lawn mower have?

A Chinese or Russian brush cutter can work for about 500 hours. But this is with the right mixture, good oil, good factory assembly. If a person fills with gasoline from one good gas station, accurately measures the same oil using a beaker, adjusts the carburetor to the same mixture, and the fuel burns correctly, then the coveted five thousand hours of service life is quite an affordable bar.

But here we must not forget about Chinese marriage. They even balance the shafts on a knee, install the cheapest bearings, and stamp carburetors with clogged channels. If a person understands the principle of operation of a two-stroke engine and carburetor, and understands how to rebuild it, then he can eventually assemble an almost perfect trimmer.

In general, if we consider the Chinese brush cutter as a space for creativity, then even its breakdown is a reason to learn something new, this is a construction kit for a man.

If you just need a tool, then you should look for a Japanese equivalent, or switch to an electric model.

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Chainsaw wet spark plug: why and what to do

You can use a special flush to clean the carburetor.

• If the carburetor gaskets are worn out, they need to be replaced. And if the tightness of this device is broken, you will have to identify the faulty carburetor part and replace it.
• The trimmer may not start due to wear on the piston group. However, it is better to change such parts of the lawn mower at a service center.

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problems with cutting blade rotation

All trimmers have a rod with a cutting blade at the end; they come in two types: straight with a gearbox at the end and curved with direct transmission to the bushing. If you are the owner of a straight rod, look at 3 components: clutch, shaft, gearbox. And if you have a curved rod: look at the bushing and rod accordingly

Pay attention to the integrity of the connections, check the connecting splines on the shaft, gearbox or sleeve. You can check the drive if the engine is running properly.

Our practice shows that many people confuse motor and drive problems. If the motor is clogged or faulty, it may appear that there is no transmission to the belt.

Trimmer clutch malfunction

All gasoline trimmers are equipped with a centrifugal clutch, the meaning of which is that the pads, when adding speed, begin to move apart and catch the cup. The easiest way to check the clutch is to unscrew the rod from the motor, usually 4 bolts. If the pads are worn out and the clutch needs to be replaced, a metallic grinding noise can be heard. If your trimmer has a clutch and the line is constantly rotating, then the spring is stretched.

Dry and wet spark plug, what does this mean and how does it affect engine starting?

Most tool owners immediately resort to checking the condition of the spark plug contacts. This is done in order to understand from the condition of the spark plug what could be the reason for the impossibility of starting the lawn mower engine. Based on the condition of the spark plug contacts, appropriate conclusions can be drawn about what may be causing the malfunction. Diagnosis of the spark plug on the trimmer is performed in the following order:

1. The spark plug is unscrewed, after which it is subject to inspection. The ideal condition of the electrodes is if they have a brown soot (brick color). If the spark plug is wet and has black or white carbon deposits, this indicates a corresponding malfunction
2. If the spark plug is wet, then there is a portion of unburnt fuel in the combustion chamber that does not need to be drained. Clean and dry the spark plug contacts, then make sure it is in good condition. To do this, connect it to the candle holder and place it on the surface of the cylinder. Turn on the ignition and pull the starter handle lightly. In this case, the spark plug should produce a high-quality and constant spark. If the spark is weak or absent at all, then the spark plug should be replaced.
3. The trimmer may not start due to a large gap between the spark plug contacts. The gap between the spark plug electrodes should be in the range from 0.7 to 1 mm. To set the gap, special feeler gauges are used

This is interesting!
Drying spark plug contacts by calcining them is strictly contraindicated, as this method will lead to damage to the part.
If there is a spark at the spark plug, but the trimmer does not start, then the reason lies in the supply of the fuel mixture to the combustion chamber. To make sure of this, you should do the following:

• Take 20 grams of fuel into the cap of a PET bottle or into a syringe
• Pour it into the combustion chamber through the spark plug hole
• Screw in the spark plug
• Put on the candle holder and start the engine

If the engine of the lawn mower starts after the above steps, then the cause of the malfunction should be sought directly in the fuel line and carburetor. If the engine does not start even after these steps, then you need to check the serviceability of the high-voltage wire. The high-voltage wire, like the spark plug, is a consumable item. If there is a suspicion that the trimmer armored wire is faulty, it should be replaced

If, after the above steps, you cannot start the engine of the lawn mower, then you need to take into account the following recommendations:

1. If there is any doubt about the serviceability of the spark plug and high-voltage wire, it is recommended to replace them immediately
2. Check that sparking is working properly, and if there is no spark on the new spark plug, then the breakdown is related to the ignition unit - coil failure
3. The ignition coil is not repaired, but replaced. If the diagnostics really indicate a malfunction of the lawn mower’s ignition coil, then it is not difficult to replace it with your own hands

https://youtube.com/watch?v=YixHJCGg9gg%3F

If there is a spark plug, and it is dry, and the trimmer does not want to start, then we move on to checking the next unit - the air and fuel filters.

This is interesting!
If the spark plug electrodes are red or pink, this indicates that the fuel used contains a large amount of additives. You should refuse such fuel by changing the gas station or brand of gasoline.

Troubleshooting

All the reasons why a lawn mower does not start can be classified according to the specific operation of individual components. The service center classifies faults as follows:

• engine malfunction (piston wear, bearing failure, crankcase crack);
• malfunction of the fuel mixture supply - clogged air filter pores or carburetor malfunction;
• The ignition system does not work;
• mechanical failure - leaking hoses, broken wires under the braid, rupture of tubes.

The user first needs to check whether there is fuel in the tank. Start up according to the instructions, placing the saw on its side. Set the air damper to the “closed” position, pump up the fuel, turn on the ignition and make 3-4 sharp jerks with the starter. If the engine starts, open the air damper. The lawn mower does not start - we repeat the operations with the air damper slightly open.

The brush cutter cannot work for a long time. The gearbox and motor will overheat. You can mow for no more than 15=20 minutes, taking a five-minute break. On a hot afternoon, the operating time is halved. When mowing weeds and sedges, the work time must be reduced.

If the launch fails, we begin to look for the cause of the failure:

• check the quality of the fuel;
• make sure the spark plug is working and the spark plug channel is clean;
• check the cleanliness of the air filter;
• make sure that the fuel filter is not clogged;
• check the cleanliness of the breather;
• clean the exhaust channel.

More complex reasons will be those detected during diagnostics of a malfunction, leading to a major overhaul of the carburetor. Such reasons include clogging of the internal channels of the carburetor, wear of the gasket on it and a violation of the tightness of the internal halls with loss of vacuum. Repairing a lawn mower yourself if it won't start will require patience.

What to do if the engine does not start?

If you cannot start the lawn mower, then the first thing you need to do is check the presence of fuel in the tank and its quality. To refuel the tool, it is recommended to use high-quality gasoline purchased at gas stations, the grade of which must be at least AI-92. Saving on cheap fuel can lead to breakdown of the cylinder-piston group, the repair of which can cost a third of the cost of the brush cutter itself.

It is equally important to properly prepare the fuel mixture of gasoline and oil. The proportional ratio of these mixture components is indicated by the manufacturer in the manual

You should not prepare the fuel mixture in large volumes, as its properties are lost during long-term storage. It is better to use a freshly prepared mixture.

When preparing the fuel mixture, pour oil into gasoline using a medical syringe, which allows you to accurately maintain the required proportion of components.

A dirty fuel filter in the tank can also interfere with the operation of the trimmer's engine. Therefore, if you have problems starting the engine, check the condition of the filter. If necessary, replace the filter. Do not leave the inlet pipe without a fuel filter.

The air filter also needs checking. If the part becomes dirty, it is removed, washed in field conditions in gasoline and put back in place. At the dacha or at home, the filter can be washed in water using detergents. After this, the filter is rinsed, wrung out and dried. The dried filter is moistened with a small amount of oil used to prepare the fuel mixture. Excess oil is removed by squeezing the filter with your hands. The part is then installed in place. The removed cover is put back and secured with screws.

The air filter, washed in the fuel mixture, wrung out and dried, is installed in place in a plastic case and closed with a lid.

You can see how this procedure is done in more detail in the video:

If all of the above procedures have been carried out, but the engine does not start, then adjust its idle speed by tightening the carburetor screw

The video posted at the beginning of the article pays attention to this issue.

So, in order:

1. Place the tool on its side so that the air filter is at the top. With this arrangement of the chainsaw, the fuel mixture reaches exactly the bottom of the carburetor. The engine will start on the first try if you remove the air filter before starting and pour a few drops of the mixture into the carburetor, then install the dismantled parts in place. The method has been tested in practice.
2. If the first tip does not work, then most likely the problem is in the spark plug. In this case, unscrew the spark plug and check its functionality, and also dry the combustion chamber. Replace a spark plug that shows no signs of life with a new one.
3. If the spark plug is in good condition, the filters are clean and the fuel mixture is fresh, then you can use the universal method of starting the engine. Close the carburetor choke and pull the starter handle once. Then open the throttle and pull the starter 2-3 more times. Repeat the procedure three to five times. The engine will definitely start.

Some people pull the handle so hard that they have to repair the lawnmower starter with their own hands. This is only possible if the cable breaks or the cable handle breaks. In other cases, it is recommended to replace the starter. This unit is sold assembled.

Adjusting the trimmer carburetor

Petrol mowers have long entered our lives as a very useful tool and an excellent alternative to a regular scythe. A petrol mower and a brush cutter are one and the same tool. Trimmers are either gasoline or electric. In this case we will talk about gasoline ones. This unit is quite easy to use, but has its own characteristics. Petrol mowers are equipped with an internal combustion engine

The carburetor of a brush cutter is a very important part of the tool. The main task of the carburetor is to ensure that fuel enriched with air enters the engine cylinder.

The most important thing here is to maintain a balance of fuel and air. The article will tell you about the signs indicating the need for adjustment, how to adjust the carbrator on the trimmer.

You can adjust the trimmer carburetor yourself, after first studying the structure of the unit. As a rule, a detailed description of the component components of the tool is in the operating instructions. An experienced master can even tell by ear that there are shortcomings in the work of the lawn mower. When properly tuned, the sound of the engine should be perfectly smooth. If you can clearly hear squealing sounds, the mixture is oversaturated.

Cases indicating the need for adjustment:

• If a fuel mixture of a different composition is used;
• During a long break in use (the brush cutter was lying idle for a long time, and even before the new season after the winter);
• After completing the equipment break-in process (usually after using 4-5 liters of fuel)
• When weather conditions change (this point is relevant for);
• Poor engine starting
• If fuel consumption has increased sharply;
• Increased amount of exhaust gases;
• Slow increase in engine speed;
• If the fuel mixture is not supplied.

Idle speed adjustment

After adjusting the fuel supply, we begin adjusting the idle speed. To do this, you need to adjust the corresponding screw so that the engine runs slightly faster at low speeds. But it is necessary to ensure that the reel with fishing line and knives are stationary. Before they start moving, there should be a few revolutions left in stock. The movement of the reel and blades can subsequently lead to rapid wear of the clutch. If you notice that the engine is difficult to start, you need to increase the number of idle speeds. As the speed increases, the fuel mixture becomes saturated with air, which leads to a loss of power.

The main signs of proper idle operation:

• RPM reserve for trimmer head;
• Uninterrupted operation of the engine even when the position changes (sudden raising or lowering of the knife);
• Quiet engine operation when cold;
• No increased speed of a hot engine.

The lawn mower does not start or starts but stalls. What is the reason?

To understand this, you need to know the operating principle of the unit as a whole. It also happens that a newly purchased new saw does not start, and running around to service centers begins. In such cases, it is recommended:

• carefully read the operating instructions; • study in detail the method of first starting and running in the lawn mower; • try to understand the operating principle of the product; • how gasoline is pumped, and so on.

Reasons for the malfunction of the lawn mower:

• the quality of gasoline is poor; • incorrect proportion of gasoline and oil; • clogging of the fine filter; • no spark.

Petrol mower won't start after winter

In such cases, the unit must be serviced. Remove the fuel system, including filters (air, fuel), disassemble the carburetor, clean and rinse each component. Blow out the filters with air

Pay attention to the quality and octane number of fuel

It is necessary to take into account that products from such well-known companies as STIHL, Husgvarna and other brands will not work on cheap gasoline with a low octane number. For them, suitable fuel is from the AI ​​brand - 92 and higher from car gas stations, and even then from well-established ones, since gas stations also have bad gasoline. The use of high-octane and high-quality gasoline will determine how long the lawn mower will be used and how long it will last.

One more fact must be taken into account that when a diluted fuel mixture is stored for a long time, its performance decreases, which also leads to consequences in which the lawn mower does not start. Therefore, it should be diluted in portions, that is, the amount of mixture that is produced at a time. The operating instructions clearly describe and explain the mixing ratio of gasoline and oil. Strict adherence to the correct proportions will at least save you from several questions about why the lawn mower won’t start and what to do in such cases.

The lawn mower starts and stalls. What to do?

1. There is a spark, and everything seems to be normal, but the lawn mower does not start; in such cases, you should check the air access valve to the fuel tank. A clogged valve leads to the creation of a vacuum in the tank, in which the carburetor does not receive enough gasoline, so the lawn mower will start, but then stall. To eliminate this cause, you need to clean the valve and try to start the lawn mower with the tank cap not fully tightened. 2. If the lawn mower does not start, you should remove and clean the fuel filter, and also check all the carburetor parts, and then try to start it. The mower won’t start again, the air filter is disconnected, try starting it without it, if the mower starts up, the reason is in the air filter, replace it.

The lawn mower won't start, the spark is gone

Loss of spark entails checking the contacts and the correctness of the gap between them, the conductive wire to the spark plug and the spark plug itself. The way to check the spark is to unscrew the spark plug, connect the wire to it, place the spark plug sideways on the engine casing and pull the starter several times, as if starting a lawn mower, while you need to look at the coal and the contact of the spark plug, a spark should run between them. If there is no spark, take a new spark plug and do the same procedure; if even then there is no spark, then the problem is in the wire or contacts, it is better to replace them.

Petrol mower won't start when cold

When starting a cold engine, it is not recommended to press the gas. Having tilted the lawn mower so that the air filter is on top, press the fuel suction button 5-6 times, set the function switch lever to the “start” position, pull the starter cord several times until the engine starts. After a few seconds of engine operation, turn off the starting system.

The lawn mower does not start when hot

If the lawn mower has recently been in operation and has not yet had time to cool down but does not want to start, press the gas trigger, sharply pull the starter cord several times until the engine starts and only then release the gas trigger. If enough time has passed and the lawn mower has had time to cool down, then you need to start it as if it were cold. If the methods described above did not help, and the lawn mower does not start, then you should contact a service center.

Authorized service - comprehensive warranty and post-warranty service for gardening, municipal, power and construction equipment from global manufacturers!

Types of starting lawn mowers

What should you do first? Press the throttle lever lock and corresponding trigger to set the throttle to the starting position. Then press the start button. Release the throttle lock, throttle trigger and start button. Thus, we have activated the throttling function. To return the engine to idle, you must press the throttle lock and throttle trigger again.

Please note that the throttle trigger must not be pulled before the engine has started and is running.

• We place the tool on a flat surface and slowly press the fuel pump button up to 10 times, the number may vary depending on the model.
• Then set the starting system switch lever to the “START” position.
• The starter cord must be pulled sharply until the engine starts.
• Let the powertrain run for 5 to 10 seconds and then depress the throttle trigger to disengage the starting system.
• Keep the throttle trigger pressed and do not release until the engine starts running evenly.
• We sharply pull the starter cord and wait until the power unit starts. In this case the trigger must be pressed.
• A warm engine is started within 10 minutes after stopping it. If more time has passed, then use the instructions for turning on a cold unit.

Starting the engine with a flooded spark plug

In this case, the power unit can be started if you set the starting system lever to the RUN position, the throttle trigger must be pressed. Then we pull the starter handle as many times as necessary to start the engine. If the power unit does not start for a long time, you should contact a service center for help.

What should you do if your chainsaw spark plug is flooded?

Most often this happens to beginners when, when starting up for the first time, they miss a “pop” on the closed air damper and continue to pull the starter handle, respectively, a lot of gasoline is produced in the combustion chamber, and not enough air prevents the gasoline from igniting.

The problem can be solved simply:

1. Use a spark plug wrench to unscrew the spark plug and check its condition. If the spark plug is wet and there is a spark, then it has been flooded. We open the air damper, turn on the switch button, squeeze the gas “all the way” and start it. The excess gasoline should come out of the saw's exhaust and the saw will start.
2. Use a spark plug wrench to unscrew the spark plug and check its condition. If the spark plug is wet and there is a spark, then it has been flooded. Turn the chainsaw over with the spark plug hole down and turn the starter ten times, while excess fuel will flow out of the engine cylinder. Then wipe dry (calcine) the spark plug, or replace it with a new one and try again to start the engine exactly following the operating instructions. If the spark plug is completely dry, this means that no fuel is entering the engine. And since there is it in the tank, then the problem is probably in the carburetor. You can take a little mixture into a syringe, inject it into the cylinder, tighten the spark plug and try to start the engine. But if the engine starts and immediately stalls, then the problem remains and you need to contact a service center.

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Portal about construction

Gasoline trimmers are absolutely indispensable when eliminating weeds in the backyard, as well as when making hay. Yes, as grandfather’s “Lithuanians” they also showed themselves to be indispensable helpers. There’s just one problem: even the old braids had to be repaired after the season.

What to do if the gasoline trimmer breaks down? Repairs in a service center are not a cheap pleasure. Is there a chance to somehow correct the situation on my own?

Why does the chainsaw stall?

If the chainsaw starts and stalls, the reasons may be different. An external inspection should be carried out before attempting to repair the instrument.

If the saw stalls during operation, you should check the presence of a mixture of oil and gasoline in the tank. If the fuel mixture runs out, the device will not work. In situations where there is still gasoline left, you should evaluate the quality of the tool before turning it off. The appearance of extraneous sounds and the subsequent sudden stop should alert you.

The formation of carbon deposits on the electrodes can also cause difficulties in the operation of the tool. You should carefully inspect the device and clean it if necessary.

When you press the gas

In cases where the chainsaw stalls when you press the gas, you should check the muffler and fuel filter. A possible cause of the problem is a leak in the fuel hoses. In some cases, adding speed helps.

Sometimes checking all the details does not give results, the tool suffocates, chokes when gas is added. If the device stalls when a person presses the gas, it is possible that the fuel supply is insufficient for normal operation. This phenomenon occurs due to a clogged carburetor or filter.

Damage can also occur due to the air filter becoming clogged with dust. When you give gas, the device stops working. You should not fix the problem yourself, since each model has individual characteristics.

The problem may be caused by insufficient or lack of lubrication on the chainsaw chain. If the chain is dry, you should clean the channels through which oil is supplied to the device bus. If the oil leaks, there are cracks and defects in the pipes, they need to be treated with sealant.

Under load

In situations where the device stalls under load, the problem may be with the gas tank or filters. Check the fuel quality and change the filter.

Often the saw does not gain speed due to the fact that the mixture poured into the gas tank has a low octane number. There is not enough power, sufficient heating is not possible, the chainsaw stalls under load.

Often, malfunctions of components lead to the device stalling under load. Hoses, seals, and gaskets should be checked for leaks. If parts are faulty, you can try to repair or replace them.

In cases where the chainsaw starts and immediately stalls, there is not enough fuel, the device does not heat up. The device must be recharged

It is important to use the correct mixture. Different types of fuel are better suited for different models. It is necessary to read the instructions, recommendations, reviews of people for whom the device works normally

It is necessary to read the instructions, recommendations, reviews of people for whom the device works normally.

Idling

In situations where the chainsaw stalls at idle, you need to inspect the condition of the muffler. If the part is dirty, exhaust gases are poorly removed, the engine cannot continue to work and stops.

The saw stalls at idle and in cases where the carburetor is not configured correctly. For beginners, it is better to entrust the repair to specialists, since there is a possibility of incorrect settings, due to which the tool will not be able to work. A tachometer is required to adjust the carburetor.

At high speeds

If the device stalls at high speeds, pay attention to the condition of the gasoline and air filters, the serviceability of the fuel hoses

A dirty air filter can be washed under warm running water.

It is important to thoroughly dry the part before installing it so that water does not damage the serviceability of the tool.

If fluid stops flowing through the fuel hose, it is clogged. You can clean the part or replace it with a new one.

In cases where the saw stalls at high speeds, but the liquid completely flows through the hose, and the air filter is clean and in good working order, look for the cause of the breakdown in the fuel filter. Replace it with a new one or clean it.

In some cases, the problem is hidden in the gasoline pump. When a component wears out, fuel begins to leak through the walls. If this phenomenon is observed, a new pump should be installed.

When tilted

If the saw does not develop speed when tilting, turns off, or stops working, you need to check the fuel level in the tank. If it is not too high, the device in an inclined position is not supplied with sufficient fuel, since the fuel pipe is above the mixture level.

Problems with the DAAZ 2107 carburetor

There are many small parts in the carburetor design, each of which is of great importance because it performs a specific job. If at least one of the elements fails, the stable operation of the unit is disrupted. Quite often, problems arise when starting a cold engine or during acceleration. The carburetor is considered faulty when the following symptoms appear:

• when operating at XX, the engine operates with dips, i.e., is unstable;
• when trying to overclock, there is some delay;
• increased fuel consumption;
• Difficulty starting the engine after a long period of inactivity.

Each of these signs indicates the need for repair or adjustment work. Let's look at the most common malfunctions of the “seven” carburetor.

XX adjustment

The most significant reason why you have to adjust the idle speed of the carburetor is when the engine is unstable at idle, while the tachometer needle constantly changes its position. As a result, the power unit simply stalls. Armed with a flat-head screwdriver, let's start making adjustments:

• We start the engine to warm up to a temperature of 90˚C. If it stalls, pull out the choke cable.

Why the chainsaw won’t start - reasons and solutions

Each model has its own weaknesses. Some saws require regular carburetor adjustments. The disadvantage of others is the chain lubrication system. Be that as it may, any breakdown can be fixed with your own hands if you figure out what its cause is and what its signs are.

What to do if the chainsaw stalls when you press the gas?

As a rule, owners of chainsaws begin to encounter this breakdown after the first 6 months of intensive use of the tool. There may be several reasons for this malfunction.

Their list includes:

• using a fuel mixture prepared in the wrong proportion. If you regularly pour low-quality gasoline into the tank of a chainsaw, in which too much or too little oil is mixed, the tool will not start. In this case, you will need to drain the fuel and also dry the engine cylinder. To do this, you need to sharply pull the starter cable several times. After this, you need to fill in properly prepared fuel and start the saw engine;
• Filling the spark plug with oil when starting the engine. This problem can be solved by removing, cleaning and drying the candle. After 30 minutes, the candle will dry and you can screw it in. After this you will need to start the chainsaw;
• no spark. This indicates poor contact between the factory high-voltage wire and the spark plug tip. If the contact is not broken, but there is still no spark, then you need to check the electronic unit of the chainsaw’s ignition system. This element cannot be repaired, so it will need to be completely replaced;
• air filter clogged. This element of the saw must be regularly cleaned of debris, small insects and dust. Otherwise, air will not enter the carburetor, where it should enrich the fuel mixture. As a result, the saw will stop starting. To solve the problem, you will need to clean the filter or replace it.

Key causes of breakdowns

Lawn mowers and trimmers often stop starting after long-term storage. To determine the cause of the malfunction, multi-stage diagnostics should be performed using special tools. In most cases, trimmers break down due to problems with the gas tank and filters.

Much depends on the resource of the tool. The older the unit, the more difficult the breakdown may be. Each trimmer part has its own recommended service life. When it comes to an end, it is recommended to replace the spare parts of the lawn mower with new ones.

No. 1. Problems with the fuel tank

Before starting the lawn mower, you should check the quality and technical characteristics of the fuel and oil used.

To determine the required amount of oil and fuel mixture, you must read the owner's manual. Fuel is poured into the tank exactly once so that it can be completely consumed during the work.

Fuel should be poured into the trimmer as carefully as possible. To minimize the likelihood of it getting outside the trimmer, you can use a standard funnel

If fuel is left in the tank for a long time, after some time it will lose its key characteristics. Such gasoline can seriously harm the engine and lead to breakdowns. For this reason, you should not fill in large quantities of fuel for future use.

Often, lawn mowers stop starting precisely because they contain old fuel. In this case, you need to pour out the old mixture, clean the tank and fill it with new gasoline.

The recommended characteristics of the fuel mixture that should be used on the trimmer (including the exact ratio of gasoline to oil) can be found in the operating instructions

In this case, the fuel poured into the tank must have appropriate physical and chemical characteristics. It is not recommended to use low-quality gasoline mixtures of unknown origin.

Most manufacturers of trimmers, for example, brands STIHL and Husqvarna, recommend filling the tank with gasoline of at least AI-95 grade. You can buy it at a trusted gas station.

The use of high-octane and high-quality fuel will determine how long the trimmer can last.

No. 2. Problems with spark plugs and spark plug channel

If the trimmer malfunctions, you should make sure that the spark plug channel is not filled with a flammable mixture. If the choke valve is not moved to the open position in a timely manner, the spark plug will be filled with gasoline when the engine is turned on.

To make sure that problems with starting the lawn mower are related to the spark plugs and spark plug channel, you need to perform the following steps:

• Unscrew the spark plug, clean it and dry it, because Only dry spark plugs can be installed in internal combustion cylinders;
• drain unused fuel from the hole in which the spark plug was located;
• remove carbon deposits on a candle - you can use ordinary manicure accessories (scissors or a nail file);
• reassemble the unit and restart the system.

In most cases, these manipulations will make it possible to start the engine.

If after replacing the spark plugs the trimmer does not work, you need to check for a spark. If it is not there, then you need to check the cable (ring with a tester) connecting the coil and the spark plug. If problems are detected with the wire, you need to install a new high-voltage cable.

No. 3. Fuel line faults

If the scythe leaves a wet trail and there is no traction, this indicates problems with the fuel line. Its condition can be checked visually - cracks and holes may form on the fuel line.

Typically, leaks and any mechanical defects are quite noticeable and therefore easily identified during a routine inspection.

You need to check the fuel line on a Chinese lawn mower especially carefully, as it can be severely deformed (twisted or torn)

Regardless of the nature of the malfunction, the defective wire should be replaced with a new one. When selecting such components, you should choose original spare parts.