The Chainsaw Gags When You Press The Gas

Table of Contents:

The chainsaw stalls when you press the gas

Clogged muffler

Over time, the muffler can become clogged. This occurs as a result of using a fuel mixture with too much oil. Deposits in the muffler impede the free flow of gases, resulting in reduced engine power. This malfunction can be determined by the gradual manifestation of the problem, as well as by the soot on the muffler.

Why the chainsaw stalls, the main reasons.

Candle problem

Checking the performance of the candle must begin with a visual inspection. The candle must be dry and clean. If the saw stalls, chances are the candle has been flooded. This happens with improper cold start attempts, especially with inexperienced saw owners. In this case, you need to try either installing a new candle, or drying the old one.

A carbon-covered candle can signal both the quality of the mixture and malfunctions in the operation of the carburetor: the reason is hidden either in the overflow of fuel or in the supply of oil to gasoline.

The Chainsaw Gags When You Press The Gas

Another breakdown can be associated with the ignition unit: when there is no spark. As a rule, in this case, the candle itself remains clean, there is contact between it and the high-voltage wire. The ignition block is usually not repaired, but completely replaced.

The chainsaw stalls. Main reasons

In this article, we will not discuss in detail the reasons for the cases in which the saw will not start at all. The list of faults with such a problem is too extensive: from factory defects to malfunctions in the ignition system. This article will focus on a specific drawback in saw operation: the device stalls as soon as it is started, or for some time during operation.

Let’s deal with typical malfunctions:

Air filter dirty

It’s easy to make sure the air filter is dirty. You just need to remove it and start the chainsaw without it. if the saw works fine, then it’s in it and it just needs to be changed or washed, depending on its type. And do not be afraid that the chainsaw will work for a while without dust protection. if there is no dust cloud around you, then everything is fine.

So, remove the air filter. To do this, you need to remove the cover from the rear upper part of the chainsaw, which is fastened either with screws, or simply with some kind of lock that you just need to turn or snap off.

If the saw operates normally when the filter is removed after starting up, then it is dirty.

The air filter can be either felt or nylon. The first resembles cotton wool or synthetic winterizer, and the second looks like a fine mesh of nylon threads stretched over a plastic case. Felt needs to be changed to a new one, but nylon can be simply washed in soapy water, dried and put back in place.

Nylon filter

Felt filter

Well, then we calmly use the chainsaw.

Poor quality fuel mixture

Gasoline must be poured into equipment in strict accordance with the manufacturer’s recommendations. Unfortunately, many ignore this advice and use what is “at hand”. This solution leads to a decrease in thrust, detonation and the appearance of carbon deposits. As a result, the quality of ICE operation decreases, the saw ceases to cope with its tasks, and stalls under high load. Fuel must be used up completely, if the time interval between sawing operations is long enough, it must be drained. Low octane gasoline is not recommended. But checking the quality of the gasoline-oil mixture is rather a recommendation for preventing breakdowns. If the main reason for the problems is that a poor-quality mixture has already been used, one gasoline change cannot be dispensed with.

Why does a chainsaw stall when heated

It often happens that the chain saw starts up on a cold one, but stalls during the heating process. This behavior of the tool can be caused by the following reasons:

  • The carburetor is incorrectly set. This problem can be identified by how the device is started up on a cold one. If it is performed without closing the air damper, and the engine starts without a preliminary flash, this means that after heating the engine, the fuel fills the candle. The solution to this problem is to adjust the carburetor. Details on carburetor adjustment
  • Coil (ignition module) malfunction. You can identify this problem by sequentially checking the spark, first on a cold and then on a hot motor. If there is no spark on a hot engine, then you need to replace the ignition coil.
  • Defective spark plug. In this situation, as in the case of a malfunction of the ignition module, the spark disappears when the engine heats up. It is necessary to replace the spark plug with a new one, and if this did not lead to a solution to the problem, then the ignition module and the distance between it and the flywheel should be checked.

The main causes of chainsaw breakdown

Although the chainsaw is a simple device, from time to time, problems arise in its operation, which can only be fixed by disassembly. The following malfunctions can be cited as examples:

  • The chainsaw is not picking up speed;
  • The chainsaw stops working in the cut;
  • The chainsaw starts and stalls;
  • The chainsaw loses its power;
  • Chainsaw stalls when pressed.

Most often, malfunctions are associated with interruptions in the functioning of the motor, as well as malfunctions of other systems and components. Proper handling of this technique is essential. When all the rules of use are followed, problems with a high probability lie in the most obvious. When looking for the causes of problems, it is advisable to start by checking the simplest part of the chain saw and finish the most difficult.

Low oil in the fuel mixture

Let’s look at the most unpleasant case first. Why? Because before manipulating the filters, it is better to make sure that your oil and gasoline are mixed in the correct ratio.

Here, however, it is worth noting that if your saw has already been turned on many times (for example, ten times), but continues to start, and then stalls again when the speed increases, then apparently everything is in order with the fuel. Otherwise, she would have simply stopped starting altogether.

But still, I recommend that you immediately dispel the slightest doubts about the quality of the fuel, as soon as your saw stalled when you accelerate for the first time. Because, if the reason is in the fuel, then, as mentioned above, you can get expensive repairs. Otherwise, you can still do it. To dispel doubts is to drain the old fuel from the tank and fill in freshly prepared fuel, in which oil and gasoline are mixed in the correct proportion.

The correct ratio is best seen in the instructions for the saw. If you have lost it, then we look at the ratio on the oil package. It is usually 1:50 or 1:40. If the oil is used “non-native” (well, for example, for Stihl chainsaws, Stihl will also be a little “native”), then I recommend using a ratio of 1:40, even if the oil packaging says 1:50.

For an accurate dosage, I myself personally use a medical syringe and a measuring container in which one liter of gasoline can be clearly measured. I pour a liter of gasoline into a container, draw 25 (at 1:40) or 20 (at 1:50) cubes of oil into the syringe and add it to the gasoline.

After preparing a new mixture, drain the previous mixture from the tank, in which we are unsure, and fill in the fresh one just prepared.

Now that you have done everything to dispel any doubts about the quality of the fuel, we move on to further actions.

As I wrote above, with a lack of oil on the piston and cylinder walls, scuffs can form. and they are almost always formed. If you are lucky and no seizure appears, then with the new fuel mixture prepared in the correct ratio, the chainsaw should start working normally.

If seizures appear, then the saw can start and stall several more times, after which it will stop starting altogether. In such a situation, I sympathize with you, because, most likely, now you will need to replace the piston group, which will be very expensive.

If the saw, as before, starts and stalls at high speeds, then we manipulate the filters.

Why does the chainsaw stall when you press the gas?

Hello! If you find yourself on this page, then, most likely, your chainsaw stalls when you press the gas, and you want to know why this is happening and what to do about it. Well, I will try to help you with this problem by examining the most common causes of such a misfortune, as well as methods of eliminating them.

To begin with, I will immediately write for novice users that many chainsaws require warming up the engine idling for about one minute before work. Saw may stall when gas is added while engine is cold.

So, if a heated chainsaw can idle, but stalls under load, then this means that:

  • Incorrectly tuned or clogged carburetor is the most common case;
  • It lacks air, the consumption of which increases sharply with increasing speed. this means that the air filter is dirty (a rare case, since the filter becomes dirty gradually, so the user first notices a loss of power);
  • It lacks fuel, the consumption of which also increases with increasing revs. this means that the fuel filter is dirty (also an infrequent case);
  • Well, and the most unpleasant case, if there is excessive friction between the piston and the cylinder wall, associated with a lack of oil in the fuel mixture. after this operation of the chainsaw, you will most likely fly into the repair of the piston group, since scuffs form on the piston and cylinder walls that prevent saw operation.
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Let’s analyze these cases separately.

Fuel filter dirty

If the option with an air filter did not suit you, then we try to change the fuel one. It is located in the gas tank and is attached to the hose through which fuel is taken from the tank.

This hose must be gently pryed off with something and removed from the gas tank its edge, on which the filter is fixed. Here, the option with work without a filter, as in the case of an air filter, is better not to apply, since you cannot know for sure if there are any unnecessary impurities in the fuel.

Fuel filter

Therefore, we simply change the fuel filter to a new one and try to work. If everything is fine, then congratulations. you found the reason.

Cleaning and adjusting the carburetor

If all of the above did not help, then, most likely, adjustment or cleaning of the carburetor is required. It is not recommended to do these procedures on your own, since most often such attempts still end with a trip to the service. So it’s better to go there right away and not disassemble anything on your own. But if you still want to dig deeper yourself, then it’s best to look. Which shows how experts do it:

I will end on this. Thanks for attention! Read more articles on this site! Until next time!

Checking the fuel filter

If the fuel filter is clogged with dirt, it will not be able to pass enough fuel through it. As a result, the chainsaw stalls if you press the gas. Fuel burns out too quickly, and a new portion of it does not have time to enter the system. If the fuel filter is slightly clogged, a significant decrease in power is observed at maximum engine speed.

Carburetor

A common cause of malfunctions of such a tool is called carburetor breakdown. It is recommended to check this element if you have certain skills. It is better to give the device to a specialist who will perform high-quality diagnostics and adjustment using a tachometer.

This is especially true when the saw stalls at idle speed. It is recommended to check the operation of the muffler. It is because of the accumulation of exhaust gases that the saw stalls at idle and does not work normally. It often happens that the saw is not used for a long time. When they start to operate it again, they notice that when starting at idle speed, the unit works well, and when you press the gas, it stalls. The main reason for this negative phenomenon is a stuck injector valve.

To check for the presence of such a malfunction, it is necessary to remove and disassemble the carburetor. To do this, unscrew the two nuts where the air filter was attached. It is removed together with the engine control lever. The choke control rod from the carburetor must be disconnected.

At the next stage, this part must be pulled slightly towards you, disconnecting the fuel supply hose. This must be done especially carefully, having prepared a special plug in advance. It is useful for closing the hose as fuel will be released from it.

When it was possible to remove the carburetor, it must be cleaned of dirt and blown on it. Only then can you try to untwist this part. It is necessary to remove the main cover and carefully knock out the valve with a small bolt. It should only allow air to pass in one direction. If it passes from both sides, then it is necessary to replace this part.

Reasons for stopping at full speed

Sometimes the chainsaw stalls at full speed. If it worked well and suddenly stopped doing it, and the starter does not turn, you can suspect that the device is jammed. In this case, you cannot do without major repairs.

When the saw worked well, but began to gradually lose power, and then stall, something completely different should be suspected. In this case, overheating of the cylinder is observed, which is explained by air leakage under the rubber pipe or its rupture. To fix the problem, it is worth changing this element.

Air filter

Contamination of this element makes it impossible for the normal operation of the chainsaw. But many models are equipped with a special expansion joint, which takes air in a different way. It allows you to do this even with a dirty filter, which has a positive effect on the operational capabilities of the unit.

In such cases, the saw’s power drops significantly, but it will not stall. Sometimes a decrease in this characteristic is also observed with piston wear.

Why does a chainsaw stall when you press the gas

Chainsaw is one of the most demanded household tools. It is used for storing firewood, cutting down trees and old branches. Sometimes it happens that the chainsaw stops working for various reasons. When this problem appears, it is necessary to carry out home diagnostics of the instrument, which will allow identifying malfunctions.

Why a chainsaw can stall when you press the gas

If the chainsaw stalls when you press the gas, you may suspect that the system is not getting enough fuel. This can happen not only at the moment of its start-up, but also under heavy load, which was not previously observed. This happens when the saw hits an obstacle in the form of a tree that needs to be cut. In this case, it works at a stronger power than just when you press the gas.

When the unit stalls when the engine rpm is added, a dirty fuel filter can be suspected. It can be easily cleaned by yourself. If a breakdown of the carburetor jet or its other element is detected, it is best to return the chainsaw to a master for repair. When the device starts, but quickly turns off, you can suspect that fuel fluid is being poured onto the spark plug. Sometimes the air filter just gets dirty.

If malfunctions are found with the chainsaw, it should be checked after it has cooled down. It is undesirable to touch hot parts, this can lead to negative consequences.

We check the main working mechanisms of the chainsaw

If the chainsaw stalls, you need to check the health of its main systems:

  • Fuel tank. The saw will not work normally if there is not enough fuel in it or it is of poor quality;
  • Ignition coil and high voltage wire. Normally, the gap of the candle should not be more than 0.5 mm;
  • Carburetor and fuel filter. If the tool does not work due to a malfunction of these mechanisms, you must contact a specialist.

Problems associated with improper operation of the fuel system

The tool will stall if the fuel line is broken or the wrong fuel ratio is selected. Especially often, such tube defects occur when the instrument is in a room for a long time, where there were sharp temperature changes. When refueling the device, you must strictly follow the manufacturer’s recommendations regarding the ratio of gasoline and oil.

Troubleshooting reasons and features

Why the chainsaw stalls after starting or during operation, you can find out only after performing a check. As a result of the check, you can not only find the reasons for the malfunctioning of the motor, but also possible breakdowns. To find the exact cause, you need to know in what cases a malfunction occurs. Let’s consider such cases, as well as find out the features of troubleshooting.

Why does a chainsaw engine stall when you press the gas

Despite the high performance of chainsaws, sometimes there are moments when the tool stops working normally. In particular, a common situation is the fact that the chainsaw starts to stall when you press the gas. For experienced tool owners, this problem is known, but beginners who are faced with this for the first time will have to seek help from specialists. But do not rush, in the material you can find all the important causes of the malfunction, as well as try to eliminate them.

Stalls when you press the gas

If the engine stalls when gas is added, this may be due to:

  • Clogged or incorrect carburetor setting;
  • Dirty air filter, whereby the engine does not have enough air to set speed;
  • Clogged fuel filter, which contributes to the intake of an insufficient amount of fuel mixture;
  • Malfunction of the cylinder-piston group. With an insufficient amount of oil in the fuel mixture, excessive friction of the piston against the cylinder walls occurs, which leads to overheating and the formation of scoring.

In case of overheating with a lack of oil in the fuel mixture, it will be necessary to overhaul the engine, which is one of the most unpleasant consequences. In order to properly adjust or clean the carburetor, you should give it to a specialist, as lack of experience with small parts can lead to damage to the mechanism. Do-it-yourself air and fuel filter check.

If the chainsaw does not allow you to develop speed when you press the gas, then it is advisable to try to replace the fuel mixture in the tank, especially if it has been in the tool for a long time.

Checking the main systems of the chainsaw

If the chainsaw stalled after pressing the accelerator, then there is a breakdown of some element. It is very difficult to determine immediately the cause of such a malfunction, since various factors can contribute to this. The search for the cause should begin with the verification activities of the main systems of the instrument, starting from the smallest to the largest.

The first step is to check the presence of fuel in the tank. Craftsmen often get so carried away during sawing that they forget to add fuel to the tank. Even if there is a certain amount of fuel in the tank, and the chainsaw started up and immediately stalled, then the reason for this may be precisely the lack of mixture as a result of clogged fuel channels.

If everything is in order with the fuel, then the cause must be sought in the spark plug. Unscrew it and inspect the contacts. If there are no signs of dampness and carbon deposits, then you need to check the size of the gap, which should be 0.5 mm, and then there is a spark. If the candle has not been replaced for a long time, then you need to change it, and then start the tool again.

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It is also necessary to check the muffler, as clogging can impede the release of exhaust gases, which affects the functioning of the internal combustion engine. The muffler must be dismantled and wet cleaned from carbon deposits. If the above steps do not help fix the problem, then you will need to understand the situation in more detail, since the reason may be a malfunction of the carburetor or the need to adjust it.

Stalls when tilted

The reason that the chainsaw starts to stall when tilted is the lack of flow of the fuel mixture into the system. The fuel pipe is located directly at the bottom of the gas tank, so tilting the tool causes the pipe to simply sit over the fuel mixture. Actually, therefore, when the tool is in operation, it can suddenly stall.

Stalls at idle

If the chainsaw does not start well and stalls at idle, then the first reason is a clogged muffler. The muffler should be dismantled and then wet cleaned. This is very important, as dust can enter the lungs during dry cleaning, which will lead to serious disruption of the functioning of the respiratory system.

The second reason that the chainsaw stalls at idle is an incorrect carburetor setting. To idle the chainsaw, tighten the screw called L on the carburetor. If the tool stalls at idle speed, then the screw should be turned 0.5 turns clockwise. To accurately adjust the carburetor, it is recommended to use a tachometer, and the tuning technology is described in this article (link).

Stalls under load

If the chainsaw starts to stall under load, then the reason for this is, first of all, an incorrect carburetor setting. If this reason is eliminated, then in addition to problems with the carburetor, the reason for the inoperability of the tool under load may be damage and wear of the crankshaft oil seals or carburetor gaskets, through which air is sucked into the system.

It is recommended to start troubleshooting by checking the oil seals and gaskets, and only after that check the correctness of the carburetor setting. Another reason why the chainsaw starts up and immediately stalls under load may be the chafing of special hoses, through which impulse is transmitted from the crankcase to the fuel pump. But such hoses are not installed on all models of chainsaws, but only mainly on professional ones. Replacing this hose is recommended to correct the problem. How to do it correctly is discussed in the:

Stalls at high speeds

When the chainsaw starts to stall at high speeds, the following parts must be checked:

  • Air filter;
  • Fuel pump;
  • Fuel filter.

The air filter must be cleaned, for which it is enough to wash and dry it (paper filter. only change). You can check the fuel filter for clogging by disconnecting the fuel hose from the carburetor. If the trickle of gas from the hose is flowing well, then checking or replacing the fuel filter need not be performed. If the trickle is weak or there are no signs of fuel supply at all, then the filter should be replaced and the breather should be cleaned with a regular needle.

Checking the fuel pump is checked for characteristic signs of fuel seeping through it. If there are no signs of leakage, then everything is in order, then it remains to check the carburetor. Depending on the saw power, the maximum speed is set, which can be checked using an electronic tachometer.

As can be seen from the description, there are many reasons why the chainsaw starts and stalls. Most often, this occurs due to an incorrect carburetor setting, although on branded chainsaws, such as Stihl, Husquarna, adjusting the carburetor is a rare event if you fill in a high-quality fuel mixture. If malfunctions and malfunctions occur in the operation of the tool, it is recommended to diagnose and repair it, and continue using it only after eliminating the malfunction. It is not uncommon for small signs of malfunctioning to become serious problems for tool owners.

Why else can a chainsaw stall when you press the gas

If, after adjusting the carburetor of the chainsaw, the problem remains, then a number of other factors should be checked. There are enough of such factors, and their verification must be carried out sequentially, moving from the easier to the more complex. It is in this order that we will consider all the reasons why the chainsaw does not develop high speeds, and at the same time stalls. It should be noted that in this case, the tool starts up and works properly at idle speed.

  • Check the chain tension. if the cutting element is tightened too much, this will put a heavy load on the engine. In this case, it will be difficult for a high-speed engine to turn the chain, as a result of which we get its termination. The problem can be corrected if the chain tension is correctly adjusted. The chain should rotate easily by hand, but keep in mind that at XX it should not move. If the chain moves at idle speed, then you need to adjust the upper screw XX
  • The quality of the fuel mixture and the correctness of its preparation. It is recommended to use AI-92 gasoline for the chainsaw. It is mixed with two-stroke oil in appropriate proportions. Although the mixing ratio is indicated on the label of the container with oil, you must use the data indicated by the tool manufacturer. The optimal value for the mixture of gasoline and oil is 40/1, that is, 25 ml of oil must be added to 1 liter of gasoline. The proportion means that for 40 liters of gasoline you need to add 1 liter of oil. If you do not adhere to the manufacturer’s recommendations, then in the end this negatively affects the operation of the carburetor and the serviceability of the CPG
  • Silencer. Very often sawfillers do not pay enough attention to the exhaust system of the tool. If the muffler is clogged, and this necessarily happens over time, this negatively affects the operation of the motor. Silencers on chainsaws are collapsible and non-collapsible. For non-separable devices, the connections are flared, therefore, in case of clogging, you need to either replace the part, or flare for cleaning. A clogged muffler affects the operation of the tool, so do not wait until the chainsaw stops starting
  • Air leaks. parts and mechanisms of the chainsaw are connected to the cylinder through gaskets. As a result, such connections are hermetically sealed, which is important for the operation of the internal combustion engine. Tightening the bolts and nuts that secure the carburetor and muffler will help to verify such a malfunction. Leakage can also occur due to deterioration of the gaskets, which must be replaced on the tool
  • Fuel and air filters are elements responsible for filtering the air and fuel mixture. If the air filter is clogged, increasing the throttle opening will not allow enough air to flow into the carburetor, causing the spark plug to flood. As a result, the engine will stall when trying to develop maximum speed. If the fuel filter is defective, the required amount of fuel does not enter the carburetor. Its lack leads to the fact that the tool cannot develop momentum, and immediately starts to stall
  • The presence of a fuel filter. This element can not only become clogged, but also detach from the fuel hose. As a result, it turns out that dirt will get into the carburetor, which will very quickly disable the mechanism
  • A breather is a hole through which air enters the chainsaw tank, thereby eliminating the creation of a vacuum inside a sealed container. The breather is located on the gas tank cap or can be built into the tank wall. The principle of its operation is such that as the gasoline in the tank is consumed, the tank is filled with air. If the breather is defective, a vacuum is created in the tank, which prevents fuel from being pumped into the carburetor. The breather allows air to pass in one direction, and eliminates the possibility of fuel leakage from the tank. You can repair the part with a thin needle that punches a hole
  • CPG malfunction. the chainsaw does not pick up speed also if the cylinder-piston group is worn out. To identify this reason, it is not at all necessary to disassemble the engine to look inside. A compressor should be used to check the amount of compression. The normal value should be at least 12 atmospheres, and if the value is lower, then the CPG must be replaced
  • Ignition System. If the engine starts, it is unlikely that the problem is an electrical malfunction. However, it will not be superfluous to unscrew the spark plug and visually inspect it. The presence of black carbon indicates the need to check the ignition. The first step is to check the gap between the ignition module and the flywheel, the value of which should be 0.25 mm. The integrity of the armored wire is also checked, and if it is damaged, then it must be replaced along with the module. Spark plugs have an appropriate resource, so they need to be changed, pre-setting a gap of 0.5-0.7 mm (indicated in the technical description for each tool model)

If checking all the reasons does not allow a positive result to be achieved, then the carburetor of the chainsaw should be removed and cleaned.

The chainsaw stalls at high speeds. simple carburetor repair

The carburetor of the instrument is exactly the mechanism that most owners are afraid to disassemble on their own. The reason is that this mechanism consists of many small parts, the location of which must be remembered when carrying out dismantling work. However, not everything is as scary and difficult as it might seem. To understand how the carburetor has to do with the problem of stopping the engine when the engine speed increases, you need to find out its principle of operation, described on the website.

The chainsaw stalls when you press the gas due to the carburetor, if:

  • Diaphragm damaged
  • Clogged filter element (mesh in the carburetor). This malfunction may be encountered by owners of tools who do not have a fuel filter or it is simply disconnected from the fuel hose.
  • Needle sticking, possibly due to outdated fuel mixture
  • Clogged nozzles or clogged carburetor
  • Bending of the connecting part connecting the membrane with the needle to supply fuel to the fuel chamber of the carburetor. This part is also called a foot, since under the influence of the membrane on it, the needle moves and the channel opens. During operation, this foot can bend (work out) or break (the engine will not start if it breaks). If the foot is bent, then it can be unbent, but this does not guarantee that the problem will soon recur, therefore it is recommended to replace the part
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It is recommended to clean and wash the chainsaw carburetor, and replace faulty parts and elements. After that, it can be put back, not forgetting to also replace (if worn out) the gasket between the carburetor and the adapter.

Where to look for the reason or where to start checking

All chainsaws have the same design and work according to the same principle. The chainsaw device can be found in this material. It does not matter which brand of tool. Stihl, Husqvarna, ECHO, Champion, Partner, Sturm and others. A malfunction that manifests itself in the form when the chainsaw stalls when the gas is pressed can occur equally both on expensive and high-quality tools and on budget Chinese devices. If a problem occurs, then it needs to be solved.

A chainsaw is a system of mechanisms consisting of parts. Any part in the mechanism can fail, which will lead to partial or complete failure of the tool. If the engine of the tool starts, this does not mean that the chainsaw is completely functional. When the engine stops working when the engine speed rises, then there are corresponding reasons. With this malfunction, attention should be paid initially to a number of the following tool mechanisms:

  • Gas tank. make sure there is fuel. If there is sufficient fuel, you should also check the serviceability of the fuel filter, the presence of a connection between the supply hose and the carburetor, and also make sure that the breather is working

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

When you press the gas, the chainsaw starts to stall. causes and solutions to the problem

The chainsaw is a highly efficient tool for working with wood. However, the high-revving motor of this tool can be used for a variety of other tasks, which is achieved through special attachments. Sometimes a malfunction such as the chainsaw stalls when you press the gas, which can be triggered by some factors. In order not to have to disassemble the tool completely, we will consider all sorts of reasons for this problem with a detailed description of how to fix them.

Adjusting the carburetor when the engine stalls while accelerating

If the check showed that the fuel supply system, muffler and spark plug are in good working order, then you need to look for a breakdown in other places. Initially, do not rush to disassemble the cylinder-piston group or change the carburetor. It is recommended to start repairs by adjusting the carburetor. For this, all chainsaws have special adjusting screws. They are designed to adjust the idle speed, as well as adjust the fuel supply at low and high speeds. A detailed description of how to adjust the carburetor of a chainsaw is described on the website.

Today we will consider the features of tuning the carburetor at maximum speed. You can make sure that the chainsaw is not developing full power using a tachometer. If there is no device, then you can make sure that the engine does not develop maximum speed by ear. We are interested in the screw on the carburetor. Which is designed to tune high rpm. It is usually denoted by the Latin letter “H”, which is abbreviated from the word “High” (high or large).

To adjust the high speed of the chainsaw, you will need to perform the following manipulations:

  • Tighten screw H clockwise until it stops.
  • Next, you need to loosen it by 1.25-1.5 turns
  • Run the tool and test the speed performance

It is recommended to adjust the tachometer, but if it is not there, then you can check the maximum speed when the tool is working under load.

After trivial tuning the carburetor, you can fix the problem with the termination of the engine when the speed rises. It should be noted that it is necessary to adjust the carburetor of the chainsaw regularly, depending on the frequency of operation of the tool. It is not difficult to do this yourself, but you can achieve accurate tuning in one case. if you use a tachometer.

Why the chainsaw stalls when the accelerator is pressed. summing up

When making an upgrade for the reasons why the saw stalls after you press the gas, you need to take stock of all sorts of reasons and their elimination. The reasons can be conditionally divided into two parts. simple and complex. You need to start troubleshooting with simple reasons, and end with more complex ones.

You definitely need to start checking from the tank, not from the carburetor, but from the gas tank. And make sure to use a properly prepared mixture. Next, you need to check the serviceability of the muffler and the presence of carbon deposits on the spark plug. After that, you will already have an idea of ​​in which part of the tool you need to look for a breakdown. Perhaps a breakdown is. That you just need to wind up the maximum speed, for which the carburetor is tuned. If this does not solve the problem, then you should check the air filter and clean it.

Pay special attention to the carburetor, after cleaning and possibly repairing which the chainsaw should work like new. If even after this the problem remains, then do not be too lazy to check the amount of compression. Perhaps the engine has a strong performance and needs to be replaced.

This completes the upgrade to restore the tool’s performance, and it is worth noting one more point, such as the use of fuel that has been stored for a long time. Many people dilute gasoline with oil, and store the mixture for months, and sometimes for six months. This cannot be done in any way, since the mixture has the properties of aging, and therefore, after its preparation, it must be used within 1-2 weeks. If you do not follow this recommendation, then you will need to often change not only the fuel filters, but also clean the carburetor, but the worst thing is that this contributes to accelerated wear of the CPG.

What to do if the chainsaw stalls

Hello dear subscribers and readers of my blog! Andrei Noak is in touch. We continue the theme of chainsaws. So, I already said before about what should be checked in a chainsaw in order to know the cause of its malfunction. Today I will turn to more valuable instructions so that you do not look for the cause of the problem for a long time and know approximately how to solve it. The chainsaw is not the most difficult tool, but it needs to be properly looked after. There are different cases, sometimes the chainsaw stalls when you press the gas, sometimes under load, and sometimes it does not idle at all. Let’s look at different situations together and try to find the right solution.

If you find that the tool does not start at all and stalls, then you do not need to rush to the service center right away, you can try to solve the problem yourself.

Saw stops working when RPM rises

Localization of problem areas:

  • Fuel pump;
  • Filters.

Filters are often clogged, especially when the chainsaw is used almost daily. The air filter can be detached and washed under warm running water. Dry thoroughly before inserting into place.

With frequent use of the tool, the gasoline pump may fail. After all, every detail has its own expiration date. It should be replaced or contact a service center.

Saw turns off when turning

In a horizontal position, the fuel pipe is at the bottom of the tank, but if the tool is tilted, the fuel cannot completely cover it. This is the reason that the chainsaw stops working when tilted, as the tube levitates in the air and does not receive the right amount of mixture.

Problems “Hot

If you notice that the chainsaw starts without any problems without warming up, and after warming up it stalls. And it will not start until it cools down, then here, there may be several problems.

Firstly, it is possible that somewhere there is a suction of a hose, an oil seal or a gasket. Second, inspect the muffler for carbon deposits. The third reason lies in the cylinder-piston group (CPG), whether there are scuffs or irregularities there.

Sometimes carburetor adjustment is required. Another important cause of the malfunction is the ignition coil. In cases where it fails, the spark is lost or becomes very weak, which is not enough to ignite the fuel mixture.

There are cases when the master is trying hard to the engine, then on cold, then on hot, thereby pumping fuel. Here you need to pull yourself together, switch the damper to “hot start” and gradually start the instrument. At the same time we knock down the speed to almost idle level and it warms up for 40-45 seconds.

Checking the main chainsaw systems

We check each system sequentially:

  • Fuel tank. Perhaps there is not enough fuel or it is of poor quality.
  • The next test is the spark plug and high-voltage wire. Please note that the gap of the candle normally does not exceed half a millimeter.
  • If the above items are checked and working correctly, move on to the carburetor and fuel filter. With a breakdown of the carburetor, contact a specialist.

Turns off under load

Powerful chainsaws often stall under load. Most likely, your fuel filter is clogged and needs to be replaced. If this does not help, then you need to check the quality of the fuel mixture and prepare a new one.

Stalls at idle

Sometimes the saw stalls at idle, and a clogged muffler is a common cause of breakdown. It can be easily cleaned by yourself, you do not need a qualified specialist for this.

To adjust the carburetor, you need to find two bolts with the letters L and H. The latter needs to be turned, slightly, only half a turn. He is responsible for the revolutions of the tool and, if necessary, will raise the idle speed.

The saw stalls after releasing the “gas

Here you need to adjust the carburetor and check if there is a powerful air leak.

We have already seen the most common cases of chainsaw breakdowns. It remains only to hope that your saw will serve without breakdowns. But even robust models such as the Stihl and Partner can sometimes fail.

If the article seemed interesting, share your tips with your friends via social networks. And I say goodbye to you. Good luck and see you soon on the blog!