Stihl 180 Chainsaw Starts And Stalls

When you hit the gas

Sawing units are idling, but the saw stalls when the gas is pressed, as the load increases. Before use, the tool is warmed up by running the engine at idle for a minute. If this is neglected, the motor stops after the pedal is depressed. Other reasons could be:

  • Clogged or unregulated combustible fuel mixing assembly;
  • A clogged air filter does not provide the desired air flow when the load increases;
  • A dirty gasoline filter does not allow the required amount of mixture to pass through;
  • Cylinder and piston wall rubbing.

Low octane fuel becomes the reason for brakes, because this circumstance does not allow the engine to reach the required power when the load increases.

Not gaining momentum

Many mechanisms of the mechanism are involved in the start-up, therefore, the loss of speed of the Stihl chainsaw after idling can be a consequence of various factors. Confident idling and interruptions in the motor under load can occur for the following reasons:

  • Development of the engine resource;
  • Wear, deformation and corrosion of the piston group;
  • Faulty ignition coil or spark plug;
  • Unbalanced carburetor screws.

Stihl 180 Chainsaw Starts And Stalls

If the tool does not develop speed, then the conductivity of the hole in the fuel tank cap is broken. The emergence of a vacuum does not provide the required amount of fuel, therefore the engine does not gain the required power. Turnovers decrease when carbon monoxide deposits accumulate in the muffler, it is difficult to remove gases from combustion.

Fills the spark plug

In this case, the spark is not able to ignite the fuel, which enters the furnace in large quantities to burn the combustible mixture. If it floods a candle, then the carburetor is faulty or a cold engine does not start correctly. The engine is purged, the procedure is performed with the ignition off and away from an open flame. To ensure that the fuel ignites at the time of start-up, the mechanism is cleaned:

  • Unscrew the candle, wipe it dry, dry it for half an hour;
  • A large layer of carbon is removed with a file;
  • Adjust the gap between the contacts;
  • The tool is turned upside down and the gasoline is drained;
  • In this position, pull the starter several times (to remove fuel residues);
  • Assemble in reverse order.

Idle

Violation of the functionality of the fuel unit system leads to air leakage. In this case, the unit stalls at idle and does not keep their number. Additional suction reduces the air impulse to the fuel pump and passes through the sump membrane or crankshaft oil seals. Diagnostics is done with a vacuum gauge.

The termination of engine cold operation occurs for other reasons:

  • The candle channel contains an excess amount of the combustible mixture;
  • The gap between the spark plug tip and the high-voltage cradle is not adjusted;
  • Power supply failure.

Check the oil seals by pouring gasoline into the crankcase, the leak is visible visually. This means that the engine does not idle, and at a high frequency, leaking oil seals will lead to seizure of the bearings. In case of leakage of elements, they are replaced with new ones and they are sealed.

Why stalls at full speed

Very often you can hear the question why the chainsaw stalls at full speed. There may be several reasons. First, you need to consider how the saw stalled. Suppose the tool worked normally and suddenly, for no apparent reason, it suddenly stalled and the starter did not turn. In such a situation, you can be 100% sure that the chainsaw is jammed and you need to start its overhaul.

The second situation is when the Stihl 180 chainsaw worked normally, then gradually lost power in a short time and stalled, while the cylinder overheated. In this case, most likely the reason is air leaks under the rubber pipe connecting the carburetor to the cylinder or its rupture. The mixture was depleted, resulting in overheating. You can eliminate the cause by changing the pipe.

At full speed

Sometimes the engine will stall after normal operation. To establish the cause, pay attention to the accompanying circumstances:

  • Motor stalls in the middle of operation for no apparent reason. The starter is stationary and will not turn. It means that the tool is jammed and requires urgent repair.
  • During normal operation, power is reduced in a short time and the engine stops, the cylinders are overheated. The situation indicates the occurrence of air suction under the rubber pipe between the carburetor cylinder, possibly due to a rupture. Air depletes fuel, nozzle replacement required.

No spark

Spark plug test is performed. Various factors affect the functioning of an element. When testing the mechanism, the reasons are revealed:

  • Insufficient carburetor adjustment;
  • Large oil in gasoline;
  • Clogged fuel and air filters.

Due to work in such conditions, carbon deposits accumulate on the plug contacts. Subsequent corrosion of the conductors causes no spark in half of the fault cases. This is because the gap between the modular contacts changes. To check the spark, do the following:

  • The tip of the high voltage cable is removed;
  • Unscrew the candle;
  • The tip is put in place;
  • The wide end of the candle is leaned against the cylinder;
  • Start the starter.

If, at start-up, a bright spark resembling lightning appears between the electrodes, then the ignition unit is operational. In the absence of a flash, clean the entire element and expose a gap between the conductors. Sometimes there is no clearance between the flywheel and the ignition coil. When rubbing the flywheel, scratches are visible on its exterior.

Idle speed adjustment

Before adjustment, the tool is maintained. In order for the idle speed adjustment to be effective, prevention is done:

  • Carburetor cleaning;
  • Flushing the engine;
  • Air filter cleaning;
  • Warming up the motor.

To adjust the operation of the mechanism at idle speed, an appropriate adjusting screw is used. Its rotation depends on the required setting:

  • With standard adjustment, the screw is turned against the clock hand to the point where it will turn tightly. After that, make 2 circles in the direction of the arrow.
  • If the saw is running at low rpm, turn the screw clockwise until the chain starts moving. Then make half a circle in the opposite direction.
  • At high frequency, the regulator is turned against the clock hand until the circuit stops. After that, the rotation is continued for another half turn in the same direction.

It will not work to adjust the idle operation if there is air suction into the engine through a gasket, an acceleration pump, oil seals, or for another reason.

Carburetor

One of the reasons why the chainsaw does not develop speed when you press the gas, but rather stall, is a carburetor malfunction. Let’s say the Stihl 180 saw worked properly, and then it was put on for a long time and did not use it. After it was started, and at idle it works well, and when you press the gas it can stall. Why stalls? The reason is a sticky carburetor injector valve. Of course, this is not 100%, but the probability of such a malfunction is high. We recommend reading an article about the device and repair of the Stihl 180 carburetor.

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In order to check the injector, it is necessary to remove the carburetor and disassemble it. To remove, it is necessary to unscrew the two nuts securing the air filter and carburetor, then remove the air filter and the engine control lever, while disconnecting the choke control rod from the carburetor. Next, you need to pull the carburetor slightly towards you, and disconnect the fuel supply hose.

Having removed the carburetor, it must be blown out and cleaned of dirt, only after that the carburetor can be unscrewed.

It is necessary to unscrew the cover of the main chamber of the carburetor, this is the one on which the compensator is installed on top. Further, using a bolt of 8 mm and a length of at least 50 mm. Knock out the valve.

After the nozzle is removed, you can blow it out with a compressor. The valve should only let air through in one direction, if you can freely blow the valve in both directions, then it is defective and must be replaced with a new one. Collect the chainsaw after the valve has been repaired, it is necessary to follow the reverse sequence of disassembly.

To see clearly how the carburetor is being repaired, or rather, how to properly knock out the injector valve from the carburetor body, you can look.

Another common reason a saw can stall when revving up is air leaks into the carburetor. It is possible to check this only with a special tool, but it is worth noting that if preventive work on the carburetor has not been carried out for a long time, then a new set of gaskets can be installed in the carburetor. In some cases, this helps to solve the problem with its depressurization.

When disassembling the carburetor to replace the gaskets, you need to carefully inspect its needle valve, press the rocker arm and check its lifting. Sometimes, especially after the Stihl chainsaw has stood for a long time with fuel in the carburetor, the needle may burn to the carburetor body and not perform its functions. Simply put, the needle valve will not allow the fuel mixture to pass through. In this case, the saw will not work.

Filter check

The first thing to check is the fuel filter.

In some cases, a filter that is clogged with dirt is unable to pass enough fuel mixture through it. Accordingly, a fuel shortage arises in the system, which leads to the fact that when you press the gas of the chainsaw, the fuel burns out, and the new one does not have time to enter, as a result of which the Stihl chainsaw stalls. Also, with a clogged fuel filter, there may be a noticeable drop in the power of the chainsaw at maximum speed, but this is with slight contamination.

Why stalls at full speed

Very often you can hear the question why the chainsaw stalls at full speed. There may be several reasons. First, you need to consider how the saw stalled. Suppose the tool worked normally and suddenly, for no apparent reason, it suddenly stalled and the starter did not turn. In such a situation, you can be 100% sure that the chainsaw is jammed and you need to start its overhaul.

The second situation is when the Stihl 180 chainsaw worked normally, then gradually lost power in a short time and stalled, while the cylinder overheated. In this case, most likely the reason is air leaks under the rubber pipe connecting the carburetor to the cylinder or its rupture. The mixture was depleted, resulting in overheating. You can eliminate the cause by changing the pipe.

Why stalls at idle

The first and most common cause of this malfunction is improper carburetor adjustment. You can adjust the idle speed yourself, for this you need to have a Stihl adjusting screwdriver, which is supplied with the unit. The adjustment hole is located on the right side of the Stihl 180 saw on the handle and is marked with “-” and “”.

If the Stihl chainsaw does not keep revving and stalls at idle, you can be almost 90% sure that it has irregularities in the fuel pump operation system, as a rule, it is air leaks into the crankcase through the oil pan gasket, or, much more often, through the oil seals crankshaft. Air leaks reduce or completely stop the impulse that is fed through special channels to the fuel pump of the chainsaw. As a result, the Stihl 180 chainsaw does not receive the required amount of fuel and stalls at idle.

Diagnostics can be carried out using a special device called a vacuum gauge.

The second way to check the performance of the oil seals is to pour gasoline into the crankcase and look at them, if the oil seals let gasoline pass, then they cannot provide normal pressure in the crankcase, which will make idle work impossible. And when operating at high speeds, with leaking oil seals, there is a possibility of seizure of the crankshaft bearings.

The algorithm for checking the crankcase and Stihl 180 oil seals for leaks is as follows:

  • The top cover is removed.
  • Dismantle the air filter housing and carburetor.
  • The handle of the chainsaw is removed.
  • The starter spins and retracts.
  • On the opposite side from the starter, the side cover and the drive sprocket are removed.
  • A piston stopper is installed in the spark plug hole or a string from the old starter with knots imposed on it is stuffed into the cylinder.
  • The flywheel and clutch are unscrewed, after which the parts are removed. It is worth knowing that the chainsaw clutch has a left-hand thread and unscrews clockwise.
  • The gear wheel of the drive of the oil pump is removed.

Having disassembled the Stihl MS 180 chainsaw, you can see the oil seals, then you need to fill the crankcase with gasoline and check the leakage. The crankcase can be filled through the fuel window in the cylinder; for this, the piston must be raised as high as possible. If leaks are found, it is necessary to replace the defective oil seals, or re-seal the pallet. You can collect Stihl 180 following the reverse sequence of the algorithm.

Reasons why chainsaw and kiosks start

A chainsaw is no longer a luxury, but an essential tool for those who have a summer residence or home property. But, like any other technique, this tool has the property of failure, despite its simple device.

The classification of major faults includes:

  • Complete lack of engine installation
  • Engine starts and stops
  • Unstable tool operation
  • Stop working at boot
  • Loss of power.

If the chain saw does not start at all, the reason may be:

  • Manufacturing defect
  • Lack of fuel
  • Problems with starting the ignition system
  • No sparks from spark plugs
  • Poor quality fuel mixture
  • Clogged carburetor
  • High voltage wire problems
  • No compression.

Why does the chainsaw start and stop, what should I do in this case? It is necessary to consider in detail the reasons for this.

Air filter

On the pages of the world wide web, you can find information that the Stihl 180 chainsaw can stall due to strong contamination of the air filter. I would like to refute this not entirely correct information, and report that the Stihl MC 180 carburetor is equipped with an expansion joint, which is designed and installed in order to take in the air necessary for the normal operation of the Stihl 180 chainsaw, bypassing the contaminated air filter. Of course, the power with a clogged air filter will drop a little, but it will definitely not stall. The power may also drop due to wear of the piston, here it will already be necessary to repair the piston Stihl MS 180 chainsaw.

Chainsaw and kiosk running: the reason,

The reason a chain saw can die right after the factory is a malfunction of a certain piece of equipment.

  • The most common reason a chainsaw ripped open and stopped. This is a low fuel level in the tank. This can be confirmed by stopping the tool when it is tilted when fuel remains in a specific location in the fuel tank. If the fuel is of poor quality, there may also be a problem with the operation of the chainsaw, in which case it must be completely replaced.
  • Breathing respite, which greatly reduces engine fuel consumption.
  • Insufficient contact of the wire cap with the spark plug, which leads to strong heating of the spark plug insulator. Contact degradation can occur due to mechanical shear or carbon deposits.
  • Malfunctioning spark plugs.
  • A muffler plug that impairs exhaust gas output, causing the engine to stall. For this reason, the chainsaw can start and stop at idle speed. Muffler deposits can also be caused by poor fuel quality or improper tool operation.
  • Poor carburetor adjustment.
  • Failure of the piston group
  • Fuel filter or pump problems. In this case, gasoline may flow through the pump or poorly pass through the fuel filter to the carburetor. As a result, the chainsaw starts and nods with increasing speed.
  • Dirty air filter. Problems with this piece of equipment lead to the fact that at increased engine loads, it simply cannot cope with them due to clogging and stops. A similar result is obtained with increasing revolutions.
  • The chain is closed due to lack or insufficient lubrication, or a problem with the chain brake.
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The reasons why the chainsaw starts and stalls

A chainsaw has long been not a luxury, but a necessary tool for those who have a summer cottage or home ownership. But, like any other technique, this tool tends to fail, despite the simple device.

The classification of the main faults includes:

  • Complete absence of engine plant
  • Engine starts and stalls
  • Unstable tool performance
  • Stop under load
  • Loss of power.

If the chainsaw does not start at all, the reason may be:

  • Manufacturing defect
  • Lack of fuel
  • Problems with starting the ignition system
  • No spark from spark plugs
  • Poor fuel mixture
  • Carburettor clogged
  • High voltage wire problems
  • No compression.

Why chainsaw starts up and stalls, what to do in this case? The reasons for this need to be considered in detail.

Carburetor

One of the reasons why the chainsaw does not develop speed when you press the gas, but rather stall, is a carburetor malfunction. Let’s say the Stihl 180 saw worked properly, and then it was put on for a long time and did not use it. After it was started, and at idle it works well, and when you press the gas it can stall. Why stalls? The reason is a sticky carburetor injector valve. Of course, this is not 100%, but the probability of such a malfunction is high. We recommend reading an article about the device and repair of the Stihl 180 carburetor.

In order to check the injector, it is necessary to remove the carburetor and disassemble it. To remove, it is necessary to unscrew the two nuts securing the air filter and carburetor, then remove the air filter and the engine control lever, while disconnecting the choke control rod from the carburetor. Next, you need to pull the carburetor slightly towards you, and disconnect the fuel supply hose.

Having removed the carburetor, it must be blown out and cleaned of dirt, only after that the carburetor can be unscrewed.

It is necessary to unscrew the cover of the main chamber of the carburetor, this is the one on which the compensator is installed on top. Further, using a bolt of 8 mm and a length of at least 50 mm. Knock out the valve.

After the nozzle is removed, you can blow it out with a compressor. The valve should only let air through in one direction, if you can freely blow the valve in both directions, then it is defective and must be replaced with a new one. Collect the chainsaw after the valve has been repaired, it is necessary to follow the reverse sequence of disassembly.

To see clearly how the carburetor is being repaired, or rather, how to properly knock out the injector valve from the carburetor body, you can look.

Another common reason a saw can stall when revving up is air leaks into the carburetor. It is possible to check this only with a special tool, but it is worth noting that if preventive work on the carburetor has not been carried out for a long time, then a new set of gaskets can be installed in the carburetor. In some cases, this helps to solve the problem with its depressurization.

When disassembling the carburetor to replace the gaskets, you need to carefully inspect its needle valve, press the rocker arm and check its lifting. Sometimes, especially after the Stihl chainsaw has stood for a long time with fuel in the carburetor, the needle may burn to the carburetor body and not perform its functions. Simply put, the needle valve will not allow the fuel mixture to pass through. In this case, the saw will not work.

Why does the chainsaw stall when you press the gas

Let’s say the chainsaw works normally at idle, but when the gas is pressed sharply, it stalls. What could be the reason? It is immediately clear that the point is not about the ignition (no spark), since if the ignition is faulty and there is no spark, the instrument would simply not start. Means the fuel system remains.

There are a lot of malfunctions in the fuel system, and to determine the exact reason why the Stihl 180 chainsaw stalls when you press the gas, you need to carry out a complete diagnosis. We recommend reading about common malfunctions of the Stihl 180 chainsaw and their elimination.

If the Stihl MC 180 chainsaw stalls at idle, does not gain power when you press the gas, or even stalls at full speed, it is necessary to diagnose the fuel system and check the crankcase for leaks. You can do it yourself, but you need to have certain skills. If you are not familiar with two-stroke saws, it is better to turn to specialists, since this technique is rather capricious and any mistakes are expensive.

Why stalls at full speed

Very often you can hear the question why the chainsaw stalls at full speed. There may be several reasons. First, you need to consider how the saw stalled. Suppose the tool worked normally and suddenly, for no apparent reason, it suddenly stalled and the starter did not turn. In such a situation, you can be 100% sure that the chainsaw is jammed and you need to start its overhaul.

The second situation is when the Stihl 180 chainsaw worked normally, then gradually lost power in a short time and stalled, while the cylinder overheated. In this case, most likely the reason is air leaks under the rubber pipe connecting the carburetor to the cylinder or its rupture. The mixture was depleted, resulting in overheating. You can eliminate the cause by changing the pipe.

For what reasons Stihl 180 stalls at idle or full throttle

Any tool can break and the Stihl MS 180 chainsaw is no exception. Today we will try to figure out such questions as: why the chainsaw stalls when the speed increases, also at idle and at full speed. Consider the options for diagnosing and eliminating malfunctions associated with this behavior of the Stihl 180 chainsaw.

Why stalls at idle

The first and most common cause of this malfunction is improper carburetor adjustment. You can adjust the idle speed yourself, for this you need to have a Stihl adjusting screwdriver, which is supplied with the unit. The adjustment hole is located on the right side of the Stihl 180 saw on the handle and is marked with “-” and “”.

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If the Stihl chainsaw does not keep revving and stalls at idle, you can be almost 90% sure that it has irregularities in the fuel pump operation system, as a rule, it is air leaks into the crankcase through the oil pan gasket, or, much more often, through the oil seals crankshaft. Air leaks reduce or completely stop the impulse that is fed through special channels to the fuel pump of the chainsaw. As a result, the Stihl 180 chainsaw does not receive the required amount of fuel and stalls at idle.

Diagnostics can be carried out using a special device called a vacuum gauge.

The second way to check the performance of the oil seals is to pour gasoline into the crankcase and look at them, if the oil seals let gasoline pass, then they cannot provide normal pressure in the crankcase, which will make idle work impossible. And when operating at high speeds, with leaking oil seals, there is a possibility of seizure of the crankshaft bearings.

The algorithm for checking the crankcase and Stihl 180 oil seals for leaks is as follows:

  • The top cover is removed.
  • Dismantle the air filter housing and carburetor.
  • The handle of the chainsaw is removed.
  • The starter spins and retracts.
  • On the opposite side from the starter, the side cover and the drive sprocket are removed.
  • A piston stopper is installed in the spark plug hole or a string from the old starter with knots imposed on it is stuffed into the cylinder.
  • The flywheel and clutch are unscrewed, after which the parts are removed. It is worth knowing that the chainsaw clutch has a left-hand thread and unscrews clockwise.
  • The gear wheel of the drive of the oil pump is removed.

Having disassembled the Stihl MS 180 chainsaw, you can see the oil seals, then you need to fill the crankcase with gasoline and check the leakage. The crankcase can be filled through the fuel window in the cylinder; for this, the piston must be raised as high as possible. If leaks are found, it is necessary to replace the defective oil seals, or re-seal the pallet. You can collect Stihl 180 following the reverse sequence of the algorithm.

Air filter

On the pages of the world wide web, you can find information that the Stihl 180 chainsaw can stall due to strong contamination of the air filter. I would like to refute this not entirely correct information, and report that the Stihl MC 180 carburetor is equipped with an expansion joint, which is designed and installed in order to take in the air necessary for the normal operation of the Stihl 180 chainsaw, bypassing the contaminated air filter. Of course, the power with a clogged air filter will drop a little, but it will definitely not stall. The power may also drop due to wear of the piston, here it will already be necessary to repair the piston Stihl MS 180 chainsaw.

Carburetor

One of the reasons why the chainsaw does not develop speed when you press the gas, but rather stall, is a carburetor malfunction. Let’s say the Stihl 180 saw worked properly, and then it was put on for a long time and did not use it. After it was started, and at idle it works well, and when you press the gas it can stall. Why stalls? The reason is a sticky carburetor injector valve. Of course, this is not 100%, but the probability of such a malfunction is high. We recommend reading an article about the device and repair of the Stihl 180 carburetor.

In order to check the injector, it is necessary to remove the carburetor and disassemble it. To remove, it is necessary to unscrew the two nuts securing the air filter and carburetor, then remove the air filter and the engine control lever, while disconnecting the choke control rod from the carburetor. Next, you need to pull the carburetor slightly towards you, and disconnect the fuel supply hose.

Having removed the carburetor, it must be blown out and cleaned of dirt, only after that the carburetor can be unscrewed.

It is necessary to unscrew the cover of the main chamber of the carburetor, this is the one on which the compensator is installed on top. Further, using a bolt of 8 mm and a length of at least 50 mm. Knock out the valve.

After the nozzle is removed, you can blow it out with a compressor. The valve should only let air through in one direction, if you can freely blow the valve in both directions, then it is defective and must be replaced with a new one. Collect the chainsaw after the valve has been repaired, it is necessary to follow the reverse sequence of disassembly.

To see clearly how the carburetor is being repaired, or rather, how to properly knock out the injector valve from the carburetor body, you can look.

Another common reason a saw can stall when revving up is air leaks into the carburetor. It is possible to check this only with a special tool, but it is worth noting that if preventive work on the carburetor has not been carried out for a long time, then a new set of gaskets can be installed in the carburetor. In some cases, this helps to solve the problem with its depressurization.

When disassembling the carburetor to replace the gaskets, you need to carefully inspect its needle valve, press the rocker arm and check its lifting. Sometimes, especially after the Stihl chainsaw has stood for a long time with fuel in the carburetor, the needle may burn to the carburetor body and not perform its functions. Simply put, the needle valve will not allow the fuel mixture to pass through. In this case, the saw will not work.

Filter check

The first thing to check is the fuel filter.

In some cases, a filter that is clogged with dirt is unable to pass enough fuel mixture through it. Accordingly, a fuel shortage arises in the system, which leads to the fact that when you press the gas of the chainsaw, the fuel burns out, and the new one does not have time to enter, as a result of which the Stihl chainsaw stalls. Also, with a clogged fuel filter, there may be a noticeable drop in the power of the chainsaw at maximum speed, but this is with slight contamination.

Why does the chainsaw stall when you press the gas

Let’s say the chainsaw works normally at idle, but when the gas is pressed sharply, it stalls. What could be the reason? It is immediately clear that the point is not about the ignition (no spark), since if the ignition is faulty and there is no spark, the instrument would simply not start. Means the fuel system remains.

There are a lot of malfunctions in the fuel system, and to determine the exact reason why the Stihl 180 chainsaw stalls when you press the gas, you need to carry out a complete diagnosis. We recommend reading about common malfunctions of the Stihl 180 chainsaw and their elimination.

If the Stihl MC 180 chainsaw stalls at idle, does not gain power when you press the gas, or even stalls at full speed, it is necessary to diagnose the fuel system and check the crankcase for leaks. You can do it yourself, but you need to have certain skills. If you are not familiar with two-stroke saws, it is better to turn to specialists, since this technique is rather capricious and any mistakes are expensive.