Air leakage in the carburetor of the chainsaw. When tilted

Why is the chainsaw stalls at idle

The engine on a chainsaw or motorcycle consumes a certain amount of air during operation, its excessive suction, through loose connections, carburetor or faulty oil seals, is dangerous and that is why why.Good afternoon, dear subscribers and guests of the channel.

The engine of the chainsaw or motorcycles is two.stroke, it works on the gasoline mixture, due to which the crankshaft bearings, connecting rods, the walls of the cylinder, piston and compression rings are lubricated.

In the crankcase, the chainsaws periodically occur either the discharge or excess pressure, due to this phenomenon there is a gasoline pump in a carburetor, which is connected to the card using special channels or hose.

Thus, it turns out that an extraneous air leaks can affect the operation of the fuel pump and the amount of air in the fuel of the air mixture, respectively, on the quality of the lubricant.

Let’s start with the worst. Effective air impoverishes the fuel mixture. Due to this, the quality of lubrication of the internal parts of the engine is deteriorated. Also, for this reason, the idle and maximum engine speeds increase.

As a result of poor lubrication and increased revolutions, the engine overheats, which leads to sad consequences, up to jamming the piston or destroying crankshaft bearings, a connecting rod.

If the air leak occurs in the carburetor or gas pump system, then the latter will not be fully filled and accordingly supply a sufficient amount of fuel to ensure normal engine operation. Due to this, the power will decrease, the saw will work on idle, but it will not be able to saw qualitatively.

Again, it depends on how much strong suction is observed. In some situations, the saw completely stops starting or starting, but when you press the gas, it immediately stalls.

Chainsaw does not gain momentum at load

Owners of a chainsaw sometimes have to face the fact that the saw, for no apparent reason, stops working normally. To understand why the dull chainsaw in various modes of work, as well as to describe how the malfunction can be diagnosed, we will try in our article.

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Why the chainsaw stops when heated

The situation in which the chainsaw begins

in the cold, and in the process of heating can slow down, is familiar to many who are connected with them. The main reasons for this behavior are the following.

leakage, carburetor, chainsaw, tilted
    The ignition module (coil) is faulty. Determine the problem by checking the spark first on the cold engine, and then on the hot. If there is no spark on the hot engine, then you should try to solve the problem by replacing the ignition coil.

Check the ignition coil using a multimeter or replacing it with a well.known. The multimeter of the primary and secondary winding is checked in the resistance measurement mode. The primary winding resistance index, the working coil, is 1 kOhm. Secondary 4 kom.

Why is a chainsaw is under load

In some cases, a chainsaw under load cannot work normally and just lies. The general reason for this behavior is the wrong settings of the carburetor or absorption of air through the oil lugs of the crankshaft or laying the carburetor. And also this can happen due to the leak of the carburetor.

To diagnose the cause and eliminate the fact that the chain saw starts and stops under load, this is best in the service center, since a special tool is required to check the tightness of the carburetor and the engine of the engine.

A saw that cannot work under load also hesitantly holds. They will “swim”. The diagnosis begins with checking the tightness of the crankcase and carburetor. If a leakage of air is detected through the oil seals of the crankshaft, they must be replaced. If air absorption is found in the carburetor, the repair kit can eliminate the cause.

Only after the above actions did not give a result, and the engine crankcase with the carburetor is hermetically closed, you can start tuning the carburetor.

The reason for this algorithm is that if the absorption of air from the crankcase is not eliminated, but the carburetor is simply adjusted to the normal operation of the engine, the fuel mixture will contain more fuel than is required for a tight crankcase, which will significantly increase its consumption. Also, most likely, the engine will have carbon deposits, which will also negatively affect the further operation of the chainsaw.

In some models of the chainsaws, to ensure the operation of the fuel pump, special hoses are installed that transmit an air pulse from the engine crankcase to the fuel pump of the carburetor. If this hose is removed, the saw will work unevenly at idle and will not work under load at all.

The saw does not develop speed, does not develop power.

Why such a problem arises? saw

He worked perfectly, but suddenly the force was lost in voyage.

The chainsaws stop when you press the gas. We are setting up the carburetor. Chainsaws when pressing gas

The video considers a rather frequent chainsaw error

and 100%.carburetor configuration method. How it is done.

Husqvarna 137 and Husqvarna 142 household owners for any engine deviation from the norm, first of all, should check the impulse hose, since this is considered the most common cause of the breakdown of these chainsaws.

Why does not apply gasoline in a chainsaw?

According to the reviews of the owners of Chinese chainsaws, the technique is often broken and the breakdown is accompanied by the lack of fuel supply to the carburetor. If you have applied the above tips, it is necessary to diagnose the following elements:

The needle of the carburetor. On cheap chainsaws often sticks a needle in a carburetor, which does not allow fuel to act. Sometimes it’s enough just to move the needle and install it correctly.

Basils. Chinese and even branded chainsaws can have low.quality oil seals with poor tightness. Fuel ceases to flow when it begins to squeeze the fuel mixture through the seals. A leak of gasoline is quite possible through the seals.

Sapun check

It is the Sapun who plays a serious role in the establishment of a chainsaw, you can find such a part near the gas tank cover, or rather in the area of ​​the air hole. The sapun plays a simple, but important role. does not allow fuel to flow out and sets the correct air pressure. It is thanks to this air that the fuel enters the carburetor, and the malfunction of this element is a common reason when the fuel does not enter the chainsaw. The impaired the work of the soundtress will serve the formation of negative pressure, from which gasoline will not be able to enter the carburetor when trying to start a tool.

Checking the operability of the cabin is quite simple, disconnect the gasoline of the carburetor pipe and check how the fuel flows. If gasoline flows with a small stream, everything is in order, if it does not flow at all, the sapun is rather clogged with dirt. With proper execution, you can clean the part, sometimes it is easier to replace with a new. The cleaning procedure is performed either manually or by the supply of a strong jet of compressed air.

To determine the prerequisite why when starting a chainsaw is not started or stall, it is necessary to defect the tool. The essence of the procedure lies in an alternate examination of the state and work of the main working parts of the saw engine. At the moment, we check:

  • The presence of a spark on the spark plug;
  • Feeding fuel;
  • The condition of the filters;
  • The work of the sapuna built into the fuel cover of the stalling unit;
  • The functioning of the graduation channel.

The first step in finding the circumstances of why the gasoline saw is not started is to check the spark on the spark plug. There are many reasons affecting the work of this element. But the main ones at the initial stage of tool defect are:

  • Incorrect adjustment of the carburetor;
  • The presence of more than the amount of oil in gasoline;
  • Flowing the air filter.

They all contribute to the formation of a carbon on the electrodes of a candle. In 50 cases out of 100, the saws are not launched on a cool due to the lack of a spark due to the deposits of the soil on the electrodes and their corrosion. In the course there is either a decrease in the clearance, or its increase.

leakage, carburetor, chainsaw, tilted

Checking a spark plug in a non.working chainsaw

Check the presence of a spark is quite easy. For this purpose it will be necessary:

  • Remove the tip of the high.voltage wire;
  • Turn out the candle;
  • Put on the tip back;
  • Lean the candle with a skirt against the cylinder;
  • Start the starter.

If, at the time of starting the chainsaw motor, not a bad spark is observed between the electrodes, then with the ignition node our client remains in order. In that case, it is not, then it is worth cleaning the element itself and checking the clearance of the electrodes. If necessary, using a special probe, adjust the distance between the contacts.

In candles of various manufacturers, the distance between the electrodes can fluctuate. Alone it is equal to 0.5 mm. Others have 0.2 mm. Therefore, study the tips of the manufacturer.

Sparks on the spark plug may not be for other reasons. From the main defects affecting the bad start of the chainsaw and the unbalanced operation of the internal combustion engine at idle, from which the tool may stall, the subsequent ones can be considered:

  • Overflow of the candle canal with fuel;
  • Lack of contact between the high.voltage cradle and tip of the candle;
  • Damage of the ignition unit.

How to start a cool chainsaw if the candle channel is poured by gasoline? Remove the case during the launch of the tool, there is an option by using the subsequent method:

  • Turn out a candle with a special key;
  • Wipe it with an unspoken and dry rag;
  • Dry for 20 30 minutes;
  • Remove the corpuscles with a file and adjust the gap between the electrodes;
  • Drain the remnants of fuel from the candle canal and dry it;
  • It remains to collect our client and try to start a mechanism.

You, these measures are enough to start the chainsaw and do the work. But, this last measure does not save the main prerequisite, which is why it does not start or stall the engine-the incorrect operation of the carburetor, which needs narrow adjustment.

If the passage without a spark with a non.good contact of the high.voltage cradle with the tip of the candle, you need to check the connection. Check is an option to carry out using an ordinary tester. If a deficiency is detected and it is eliminated, the chainsaw should start without special troubles.

If the audit showed that the contact is reliable, and the saw and then does not start, look for the cause in the ignition unit. Usually, a faulty block of repair and restoration cannot be subject. Here it will need to have a complete change.

In the beginning, you need to make sure that the fuel mixture is in the tank of the chainsaw that does not want to start, and it regularly enters the carburetor. With a full tank, we check how the mixture is supplied to the gas pipeline. Disconnect the pipe of the fuel accounting system from the carburetor and try to swap. For which the design of the full order is intended, when pumping, gasoline will be supplied with jerks according to the norms given by the manufacturer. Weak supply of fuel in other words, its absence will be a consequence:

Breakdowns associated with a chainsaw and possibly a huge amount, and to solve some is quite difficult. If you have been working with this benzo tool for a long time, you have an inconsistent when gasoline does not enter the carburetor or enters, but it is very difficult and does not even give a chainsaw to start normally. Modern, specialists have long found the prerequisites for such breakage in this regard, we compiled the main methods of repair.

We check the obvious prerequisites, for example, the presence of gasoline in the tank. If this is available, check the supply of fuel from the tank along the wire. It is enough to disconnect the gas pipeline from the carburetor and try to upload fuel. It will be correct to serve fuel through the hose with jerks, this will allow you to make sure that there is no trouble with the gas tank. If the fuel is not even served with jerks or it is very slowly dripping, the prerequisites will be subsequently:

The fuel filter clogged with dirt and dust;

Breathtakingly, but the presence of a full tank is a prerequisite when a fuel does not act. So try not to fill the tank completely. A crowded fuel tank can squeeze the tube with a pressure that connects to the carburetor.

Who knows the experienced chainsaw user that fuel in the tank of the instrument cannot be left forever. It exists that with prolonged storage of snurs of the tank, unnecessary processes will occur with the formation of resin and polymerization of different components. Do not leave a fuel in the tank duration of the crescent, and in addition, if your tool starts up on such fuel, this leads to the formation of soot on the details of the CPG (rings, piston).

If the chainsaw does not enter the carburetor, carefully examine the type of air filter. Due to its inconsistent work, the unbalanced operation of the chainsaw begins, which further starts to start differently during operation. The air enters the device more difficult and makes the mixture very rich. You can doubt it doubtfully, and the premise of this is the formation of dust.

It is necessary to remove the air filter neatly, because if it is stored dust, it can crumble at the carburetor. The air filter is quite perfectly cleaned with water and detergent. Be sure to dry the filter before installation.

The needle of the carburetor. On cheap chainsaws, the needle in a carburetor often sticks a needle, which does not allow me to act. From time to time it is quite easy to move the needle and correctly install it.


Basils. Chinese and sometimes branded chainsaws have bad oil seals with bad density. The fuel ceases to act when through the seals it begins to squeeze the fuel mixture. Through the seals, the leakage of gasoline is completely likely.

Specifically, the sapun plays a severe role in the establishment of a chainsaw, find such a part of course near the gas tank cover, and more precisely in the area of ​​the air hole. The sapun makes an ordinary role, however, it does not allow the fuel to flow out and sets the correct air pressure. Thanks to this air, the fuel enters the carburetor, and the malfunction of this element is a frequent prerequisite when the fuel does not enter the chainsaw. The impaired the work of the soundtress will serve the formation of negative pressure, from which gasoline will not be able to enter the carburetor when trying to start a tool.

Check the operability of the soundtress simply, turn off the gasoline of the carburetor tube and check how the fuel flows. If gasoline flows a small stream, which remains to make our client in order, if it does not flow at all, the soundtress is clogged faster faster. With the right execution, of course, clean the part, if it is easier to replace it with the latest. The cleaning procedure is performed either manually, or by supplying a strong air jet of high pressure.

Basil starts and stalls. the reason

If the chainsaw is started and stalling at the first attempts to do the work, then the reason may consist of problems with the brake of the chain or in its jamming due to lack of lubrication. In this case, the level of oil is measured. If the lubricant volume is sufficient, then the reason may be in the tube that leads it to the lubricant mechanism.

Another reason may be a carburetor breakdown. If he needs only adjustment, it can be done independently in accordance with the instructions. If the carburetor needs to be cleaned or repair, then you can not do without the help of professionals.

Another possible cause of this malfunction is a low fuel level in the tank. In this case, the motorcycle is stalling when tilted, since the remainder of the fuel mixture is in the part of the tank, the opposite of the place where the suction tube is located.

Why the chainsaw stalls when heated

It often happens that the motorcycle starts up on the cold, but stalls in the process of heating. This behavior of the tool can be caused by the following reasons:

  • The carburetor is incorrectly configured. This problem can be identified by the way the device is launched on a cold. If it is carried out without closing the air damper, and the engine is launched without a preliminary flash, this means that after heating the motor, the fuel floods the candle. The solution to this problem is to adjust the carburetor. Details about carburetor adjustment
  • Coil malfunction (ignition module). This problem can be identified by sequentially checking the spark first on the cold, and then on a hot motor. If there is no spark on the hot motor, then you need to replace the ignition coil.
  • Falf in the spark plug. In this situation, as with the malfunction of the ignition module, the spark disappears when the motor is heated. It is necessary to replace the candle with a new one, and if this did not lead to the solution of the problem, then the ignition module and the distance between it and the flywheel should be checked.

Possible malfunctions

To establish the work of any tool, you must first establish the exact cause of the failure. Consider the most common options for situations in which a chainsaw stalls.

Poor.quality fuel

For the non.failure functioning of the engine, the quality of the fuel used is important. For a saw to work without interruptions, it is important to use the right fuel

Pour gasoline with an octane number recommended by the manufacturer in a tank.

The second important condition is the choice of proper oil. When buying, it is worth giving preference to brands that produce lubricants with special additives

leakage, carburetor, chainsaw, tilted

The saw can stall with non.compliance with the proportions of gasoline and oil during refueling. The mechanisms are jammed from the lack of lubrication, the tool stops working.

When mixing, it is worth using the proportions indicated in the instructions for the saw, and not the data on the oil packaging. The optimal ratio for most tool models is 25 ml of lubrication per 1 liter of gasoline.

For uninterrupted operation of the saw, use AI-92 gasoline and two-stroke oil.

Filters clogged

The saw in this case works idle, but when you press the gas stalls. Most often, this leads to the use of poor.quality gasoline. Filter clogging violates the flow of fuel into the engine, so the saw stops at loads.

One of the important details of the tool is air filter. The performance of the chainsaw depends on its purity and the right choice, which directly depends on the operating conditions of the tool:

  • Cotton filter. installed on the tools that work with a saw in the warm season with dry air.
  • The HD 2 filter is designed to use the tool in winter or in dusty conditions (for example, with volumetric blades of forest). Such details are more often equipped with a professional tool.

Sapun is clogged

This small hole on the tank of the chainsaw is designed to ensure access to it in it. Depending on the model, it is located in the lid or in one of the walls. The clogging of the soundtrack leads to the creation of a vacuum inside the tank, which prevents the intake of fuel into the carburetor.

Fuel supply is broken

Cliff or damage to the pipe is the possible reason that the saw stalls during operation. In this case, the tool is started, since there is a small amount of fuel in the engine, but it refuses to work further.

Pilament storage at minus temperatures leads to cracking of the fuel tube. The situation will only be corrected by the replacement of the details.

Problems with electrical elements

Spark plugs. an important element of the chainsaw engine. The tool can stall when the carfangle is accumulated on their surface. Therefore, candles need to be periodically cleaned and changed in a timely manner.

Problems with power can occur with a violation of the gap between the ignition coil and magneto. This leads to impacts during the operation of a saw in difficult conditions. For stable engine operation, the gap should not be more than 0.5 mm.

Expert opinion Levin Dmitry Konstantinovich

The absence of a spark may be associated with clogging the fuel filter or depressurization of tubes. If the candles are wet, then during the operation of the tool they are filled with gasoline or oil.

Not adjusted or clogged carburetor

The problems of this node are indicated by the stop of the saw at idle.

The carburetor fails in the following cases:

Dirty muffler

The cluster of soot in this part leads to the loss of the power of the tool. The muffler can clog using irregular or low.quality oil. The bolom may also lead to the addition of too much lubrication to gasoline.

The chain is poorly lubricated

Due to the blockage or damage to the oil drive, the tire of the tool remains dry: the chain jams and the saw stalls during operation. The same problem may occur when using low.quality oil.

Power system: improper fuel mixture

Two-stroke engines are designed to work from a mixture of gasoline with butter, which is necessary to lubricate the cylinder-piston group. The lack of oil will quickly disable the tool and lead it to major repairs.

In gas tools of different manufacturers, the ratio of oil to gasoline is 1:40 or 1:50. This proportion cannot be violated in any case. If the oils are poured more than the necessary, this will lead to the shift of the compression rings of the piston. They will tightly fly in their grooves, and the motor will lose compression and power.

The exception is only the mode of running the tool. In this case, the mixture is made 1:25 and it is used for a short time, with a minimum load.

Signs of an excess of oil in gasoline are as follows: the chainsaw stalls, abundantly smokes, does not develop power.

Why does the chainsaw not gain momentum and stalls

If the chainsaws a minute after the start is not able to gain momentum or stalls when pressing the gas trigger, most likely, the carburetor or engine crankcase is leaky. As in the previous case, the problem can be solved by checking for tightness and adjusting the carburetor.

If the chainsaw does not gain momentum and stalls after it worked normally for about 5 minutes, the reason may consist in a defective fuel tank saep. The vacuum created in the fuel tank during the operation of the tool does not allow the engine to receive the required amount of fuel for its normal operation, and for this reason it will be unable to gain momentum or stall. At the same time, if you stop the tool, open and close the lid of the fuel tank and start the chainsaw again, the tool will again work normally for about five minutes, after which it will stop gaining speed or staller.

The reason that the chainsaws are not gaining momentum may be an excessive incident in the muffler, which complicates the production of exhaust gases, thereby reducing the power and engine speed.

If desired, the need to check the tightness of the crankcase, but the absence of a special tool, you can use the following verification methodology.

Carter testing algorithm for tightness

  • Remove the side cover and tire from the chainsaw.
  • Unscrew the spark plug and lay the lace with nodules into the cylinder through the candle hole, thereby stagging the movement of the piston and crankshaft.
  • As a lace with nodules, you can use the old cord from the starter, imposing nodules on it after 3-5 cm.
  • Spin the leading star of the chainsaw.
  • Remove the lid of the oil pump and the pump itself.
  • Remove the starter from the chainsaw.
  • Spin and remove the flywheel.
  • Remove the carburetor.
  • Using a syringe, through a hole under the carburetor in the cylinder, pour gasoline into the crankcase, while watching the crankshaft oil seals. If gasoline is leaking through them, then the seals are unusable and they must be replaced with new.
  • It is better to entrust the installation of oil seals to professionals.

An indirect sign of crankcase leakage is oil sinks in the seamstress area.

Why is the chainsaw starts up and immediately stalls

The chainsaw is started and immediately stalls, the reason for this behavior can be hidden in the carburetor. The fuel pump malfunction or violation of the main fuel nozzle can cause this saw of this behavior. The impossibility of the chainsaw after starting, requires complete diagnosis in the service center.

All of the above options for incorrect engine operation have similar reasons that, depending on their neglect, may have various manifestations. For example, with a slight air leak into the engine crankcase, its operation will not change much, the engine power will fall a little, its maximum speed will increase, and it will be able to heat up a little more. In the middle stages of air leaks, the engine will stop working at idle and will be very hot when working. A strong air leakage, it will make it impossible to work a saw, it will start and shove right away.

In parallel, the visible manifestations of malfunctions, for example, the unemployment of the chainsaws after starting, inside the engine at the time of its improper operation, will take place processes that irreversibly lead the saw to the most severe consequences, for example, melting the piston, jamming of the crankshaft shaft.

Why the chainsaw stalls when heated

It often happens that the chainsaw begins to cool, but stops when heated. This behavior of the tool can be caused by the following reasons:

  • The carburetor is installed incorrectly. This problem can be determined by how the device starts on the cold. If this happens without closing the air damper, and the engine starts without a previous flash, this means that after warming up the engine, the fuel fills the spark plug. The solution to this problem is to adjust the carburetor. Carburetor adjustment details
  • Coil malfunction (ignition module). This problem can be found by sequentially checking the spark first on a cold, and then on a hot engine. If there is no spark on the hot engine, it is necessary to replace the ignition coil.
  • Faulty spark plug. In this situation, as with the malfunction of the ignition module, the sparking disappears when the engine is heated. The spark plug should be replaced by a new one, and if this does not solve the problem, check the ignition module and the distance between it and the flywheel.

Why is the chainsaw stall under load

Sometimes a chainsaw cannot work normally under load. This is most often caused by improper adjustment or carburetor leakage. In addition, the cause of this problem may be air leaks through the gasket of the carburetor or a crankshaft seal. A tool that cannot work under load can also reliably maintain the olfactory speed.

Diagnosis begins with checking the carburetor and crankcase for tightness. If air leaks are detected through the seals of the crankshaft, they must be replaced. If air leaks are found in the carburetor, to solve the problem you need a kit for the repair of the gasket.

If these actions do not lead to the desired result, and the engine card with a carburetor is tightened, then it is necessary to adjust the carburetor.

If the Husqvarna chainsaw is under load, first check the impulse hose for the presence of malfunctions in the engine, as this is the most common cause of this brand of the chainsaw.

When you need adjustment

As already mentioned, the new chainsaw already has standard fuel supply settings. But for proper, it is recommended to limit the maximum engine speed, and this is done using adjusting screws located on the carburetor housing. Also, after the, you will need to again make a more accurate setting of the supply of the combustible mixture.

In addition, the carburetor will have to configure in the following cases:

  • Due to strong vibration, factory settings were lost;
  • ICE starts poorly and stalls immediately;
  • ICE starts up, but the turns does not develop, and it stalls;
  • The piston group was worn out. in this case, adjusting the carburetor of the chainsaw is possible as a temporary measure;
  • the engine does not function at idle;
  • Increased gasoline consumption, due to which the unit gives out a lot of smoke, the muffler and the spark plug are polluted by the soil, the engine power decreases.

Rules for setting a carburetor

You should know that the carburetor can be correctly configured only if:

  • Cleaning filters (gasoline and air) are not contaminated;
  • nozzles and channels suitable for them are clean;
  • membranes have no damage;
  • The needle valve is working and the necessary volume of the fuel mixture is received in the float chamber.

To adjust the carburetor of imported chainsaws, it is necessary to adhere to the following rules.

  • Before adjusting, if possible, you should warm the engine at idle or minimum speeds of about 10-15 minutes.
  • The rotation of the “l” regulator is achieved by such a engine that it gives out a idle one and a half to two thousand revolutions per minute. But you should pay attention to how the engine is gaining momentum. When pressing the accelerator lever, acceleration should go quickly and evenly. If the “failure” is detected, the screw should be slightly twisted until this phenomenon is eliminated, since it is caused by insufficient enrichment of the fuel mixture.
  • When the supply of the mixture at low speeds is adjusted, you should start twisting the “T” screw until you notice the rotation of the saw chain. After that, the screw should be unscrewed by half or a third of the turn, observing the behavior of the adhesion mechanism. Normally, at idle speeds the saw should not rotate.

The screw “h” is compensated by underestimated or overestimated revolutions due to replacement of the type of fuel, changes in the concentration of oil or humidity.

Also, the “upper” setting can fly when improperly adjusting low revolutions with the corresponding screw.

Screw “h”, without enough experience, it is better not to regulate. If the tuning of the gasopyle carburetor is carried out by an incompetent person, the danger of the fact that at high speeds to the combustion chamber is too impoverished, especially during load. Such an engine operation will inevitably lead to the rapid wear of its piston system and to failure in the ignition system.

You can start adjusting high speeds if a person who sets up is knowledge and skills to adjust carburetor engines. At the disposal of the master, a special device should have a special device-a tachometer or multimeter with the function of the oscilloscope.

Setting up a chainsaw carburetor, namely, high engine speeds, occurs according to a simple scheme.

  • It is necessary to tighten or twist the “H” screw until the engine develops about 15 thousand revolutions per minute (according to the tachometer) or the value that is indicated in the manual to this unit on maximum gas.
  • When using an oscilloscope, the spark discharge frequency should be in the range from 230 to 250 Hz. It should be borne in mind that under load the frequency can decrease by approximately 10-15%.

It can be concluded that for safety should you configure the internal combustion engine to slightly low speeds.

The carburetor of the Chinese chainsaw should be configured by the same principle, as described above. There are holes on its case, into which, in order to adjust the engine speed, you need to insert a flat screwdriver. Each hole is signed by any one letter of three. As a rule, near the upper hole you can see the letter “T”, and near the lower ones (shown by arrows). the letters “L” and “H”.

The Chinese Carver chainsaw (Carver) has the same location of the screws. The following figure shows what a carburetor looks like from a Chinese chainsaw outside the unit housing.

Carburetor setup in case of changing working conditions

In this case, you do not need to identify a breakdown, and the carburetor adjustment is performed so that the chainsaw can work in new conditions for it. First, start the chainsaw and let the engine warm up within 10 minutes. After that, you need to determine the position of the idle screw so that the speed is maximum. To do this, very slowly and smoothly turn the screw in one direction, then in the other and so on until you find the position of the screw. After that, turn this screw for a quarter of turning counterclockwise (hereinafter PEF).

Then continue adjusting the idle stroke, using the screw “s”:

  • If the chain, after manipulations with the first screw, is motionless, then you need to smoothly rotate the “S” screw clockwise (hereinafter referred to as you) until it starts moving, and then twist the screw “S” to a quarter of the turn in the opposite direction;
  • If the chain moves, then you need to rotate the screw “S” of the PFS until the chain stops, and then twist the screw “S” to a quarter of turning in the same direction.

After this setup, the engines should work evenly and the engine acceleration should be normal. Normal engine acceleration is when when clicking on the fuel supply button, the revolutions gain maximum values ​​without failures. If the engine does not work evenly or very poorly accelerate, then you need to twist the “l” of the PCH on 1/8. After that, you need to again make the setting of the screw “S” described above. These manipulations need to be repeated until the engine begins uniform operation and acceleration will be normal.

After that, you need to check the setting of the bolt “h”. To check it, you need to disperse the engine to maximum speed. Be sure to pause and do not hold maximum turns without load for a very long time. Watch the exhaust and sound of the motor. If a lot of blue smoke comes from the muffler and the motor works very loudly, then your carburetor makes a very rich mixture. In this case, you need to turn the bolt »H” by a quarter of bad. After that, check the engine operation again and repeat the adjustment if necessary.

When a motorcycle makes a screeching sound, the motor is very hot, the exhaust is accompanied by a crack and/or interruptions in the ignition are heard, that is, detonation is underway. the mixture is too poor, and the maximum engine speeds are higher than should be. This leads to overheating of the power unit, the burning of the piston, the rapid wear of the cylinder and the burnout of the candle. In this case, you need to “h” for 1/4 turnover, turn the prom.

At the end of the adjustment, check the saw at idle. With properly adjusted UPT, it should work as follows:

CHAINSAW FLOODING. Wet Filter or Spark Plug. This is why!

leakage, carburetor, chainsaw, tilted
  • one. The chain is motionless.
  • 2. Engine sound almost like a four.stroke.
  • 3. Accelerator pressing a quick set of maximum speed.

If these conditions are not fully respected, “S” (“LA”, “T”) should be used, as indicated above, or repeat the setting from the very beginning.

This is how approximate setting is carried out. For accurate, you need a tachometer. We do everything the same, only turn the adjusting bolts, focusing on the testimony of this device. This will allow accurately and most likely the first time to configure the carburetor, having achieved depending on the model of the tool for working with the wood installation tree at 2800–3300 rpm or higher and maximum. 11000–15000 rpm of/min. Which ones should be exhibited, you need to look in the technical documentation (operating instructions) at the saw.

Settings partially or completely resolved carburetor

After maintenance, for example, disassembly and washing or preceding unsuccessful attempts to configure this node may be completely resolved. So much so that the motorcycle will not start at all. In this case, it is necessary to configure the device of the engine power system in 2 stages, conditionally called:

At the first stage, the adjusting screws “L” and “H” slowly screw the worships until it stops. In this case, do not make great efforts and try to tighten them. Then we turn off both screws back. for many models drank for 1 turnover. And for some-for 1.5 turnover. There may be other installations. This must be clarified in the technical documentation for the chainsaw. In a number of models, the hint is applied directly to the cover of their housing near the adjusting screws.

This will be completed by the recommended factory basic setting of the carburetor. At the same time, the screw “s” (“la”, “t”) in no case do not touch, unless of course it was twisted. When he is already twisted, you will have to work with it and. Slowly screw the “s” of the PFS until it stops.

We move on to the final stage. We are trying to start the engine. If there were no manipulations with the adjustment of “s” (“la”, “t”) and exactly “l” and “h” are recommended as recommended, then it should start.

If “S” had to be twisted for the above reasons, then the motor, most likely, will not immediately start. After each attempt, it will be necessary to twist this screw at 1/4 of the turnover of badges and try to start the engine again. In the end, he must earn.

Then we warm up the engine for 10 minutes. If, after starting it or during the heating process, the engine works unstable or the chain begins to move, then it is necessary to slowly and carefully rotate “s” (“la”, “t”) of the PFS. As soon as the engine begins to work stably and/or the circuit stops, we immediately stop adjusting. If the motor stalls, then wean this screw by 1/8–1/4 (look in technical documentation) of the turnover.

In the process of warming up, the idle speed may begin to increase, then, again, it will be necessary to start “S” (“LA”, “T”) to slowly til up the PFS until they are by ear. On the already heated motor, we continue to adjust the node of the power system, as described in the previous chapter.

Stihl chainsaw malfunctions

In cases in which the gasoline saw used is not able to steadily gain momentum and spontaneously stalls while pressing the accelerator, you will need to carefully check the ICE card and the carburetor. First of all, the operator must carefully examine the nodes and make sure that they are not sealed. If a large amount of oil was found inside the crankcase or carburetor, then you need to eliminate the leak inside the faulty node.

The next reason, due to which the chainsaws do not develop momentum, serve as a factory defect or mechanical damage to the cabin, located inside the fuel tank. A vacuum may form in the fuel tank, which leads to the lack of fuel supply to the working cylinder of the power unit.

Another reason for this problem may be deposits accumulated on the surface of the fuel cylinder. In this case, you need to remove the filter element and rinse it in pure gasoline. If after this the chainsaw continues to stall at load, then you need to perform the following procedure: drown out the power unit of the chainsaw, remove the fuel tank cover and tighten it again.

Another common reason for the lack of revolutions of the saw engine may be a thick layer of carbon monoxide on the walls of the factory silencer. Small deposits and ash will prevent the output of the exhaust gases, which will lead to their return back to the motor compartment. As a result, the engine will begin to make extraneous sounds and lose strongly even with a slight press on the accelerator.

This malfunction is typical for novice gardeners, ignoring the need for timely maintenance of their benzo.tool. In the case of an arbitrary set of revolutions, the reason should be sought in a carburetor. First of all, it will need to be completely disassembled. Having made sure of all the parts, you can start washing the fuel node. For this you need:

  • Place all the elements of the carburetor in a container with clean gasoline. After the knocks of the details, you need to extract, thoroughly rinse them with water and dried;
  • Fuel tubes must be blown out by compressed air from the cylinder. Immediately before the return installation of the hoses in the places of their connection to the fittings, it will be necessary to apply silicone sealant;
  • After installing the carburetor, not a chainsaw must be adjusted to adjust it. Before this, you need to make sure that the power unit is working, as well as in the working condition of filters, rubber gaskets and bushings.

In some cases, the cause of arbitrary setting of a chainsaw can be the loss of sealing crankshaft. Due to constant contact with a moving shaft, the oil seal is excited, which leads to the formation of cracks and holes inside it. Damaged laying is not subject to restoration, so it must be replaced.

Often the cause of the air leakage, due to which an arbitrary set of revolutions by the engine occurs, is the loss of fixation of bolt compounds. In this case, the operator will need to tighten all the bolts and again check the work of the benzo tool.

There may be several reasons for this common breakdown. Basically, the loss of revolutions during the operation of the internal combustion engine at idle is associated with the malfunctions of the engine, the loss of compression in its standard cylinder, the ignition system, the carburetor, as well as the incorrectly prepared fuel mixture. In search of the exact cause of the breakdown, the operator may face the following problems:

    accumulation of tarry deposits and ash, fine garbage on air and fuel filters of the chainsaw. if possible, elements must be washed. If, in addition to blockages, cracks or holes were found on the surface of the filters, then the foam elements will need to be completely replaced;

  • The spark plug defect. cracks, chips or burrs violate the part of the part, which leads to loss of motor speeds in the idle operation mode. In this case, the candle will need to be replaced;
  • The loss of factory settings of the carburetor. increased pressure on the power unit leads to an increase in its vibration. As a result, the spring.loaded metal bolts of the fuel unit lose their original position, which leads to a loss of revolutions of the engine;
  • cracks and holes in the fuel tube. to repair the chainsaw, the hose must be replaced;
  • blockage of the inner walls of the muffler. dismantling, thorough flushing and the back of the muffler will help solve the problem. If large burrs formed on the inner cavities of the element, then it will soon begin to rust. To prevent this, it is better to replace the silencer immediately;
  • The malfunction of the CPG of the power unit is the appearance of microcracks or burrs on the inner surface of the cylinder and the piston will lead to the loss of the tightness of the working chambers. As a result, the amount of air required to enrich the fuel mixture will be violated. the result will be the loss of the ICE speed when working at idle.

Stihl 180 chainsaws, which you can identify and make it yourself, should be operated according to the manufacturer’s instructions. The trigger button, for example, should be turned on only after the master checks the chain tension, and also make sure that the corresponding tanks are filled with oil and the fuel mixture. The chainsaw should be securely fixed in the hands, only after you can start work.

You can start identifying the malfunctions of the Stihl 180 chainsaw yourself if the warranty period expires. Sometimes the engine works with interruptions that can be caused by the failure of the cylinder piston group. You can repair it yourself. To extract a cylinder from the tank on its head, you need to unscrew the bolts. The master should check the piston, there should not be chips, scratches and naps on it. If any, it was possible to find, then the piston must be replaced.

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Piston rings and piston provide optimal pressure in the combustion chamber. The rings should be tightly worn on the piston case. If the piston inserted into the cylinder has a free move when swinging, then this indicates his wear. To eliminate the problem, it is necessary to waste the cylinder and install repair parts. But the easiest way will be to replace the CPG set.

How to extend the operating life of a carburetor?

To prevent breakdown of the standard node, the owner of the garden tool should adhere to a number of rules. These include:

  • the use of a properly prepared fuel mixture. with each mixing of gasoline and engine oil, you need to strictly adhere to the proportions specified in the operating instructions;
  • the use for refueling gasoline of the brand indicated by the manufacturer-for the operation of an engine operating on the gasoline of the AI-92 brand, the AI-95 fuel, and vice versa;
  • Regular flushing. cleaning the node from dust and dirt accumulated on the walls will facilitate its everyday work;
  • Setting up the node with immediately after detecting malfunctions. you do not need to postpone the adjustment of the carburetor, as this can lead to even more serious breakdowns.

During the operation of the chainsaw, you need to ensure that dust, sawdust and fine garbage do not leak under its case. Otherwise, they will quickly clog the carburetor and block his work.