The Chainsaw Does Not Idle It Stalls

7th September 2020

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, 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).

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.

Carburetor

One of the reasons why the chainsaw does not develop speed when you press the gas, but, on the contrary, stall, is a carburetor malfunction. Let’s say the Stihl 180 saw worked properly, and after it was put on for a long time and did not even use it. After it was started, while at idle it works perfectly, and when you press the gas, it can stall. Why stalls? The reason is a sticky carburetor injector valve. Naturally, this is not 100%, but the possibility of such a malfunction is the highest. We advise you to read an article about the device and repair of the Stihl 180 carburetor.

If you set a goal to check the nozzle, you need to remove the carburetor and disassemble it. To remove, you need 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. Then it is necessary to slightly pull the carburetor only towards you, and disconnect the fuel supply hose.

It is necessary to very carefully remove the fuel hose, and prepare a plug for it in advance, since fuel should go with its use.

Having removed the carburetor, it must be purged and cleaned of dirt, only after which the carburetor has an option to spin.

Why does the chainsaw stall when you press the gas

Let’s say the chainsaw works fine on idle running, alas, with a sharp press on the gas stalls. What is the reason perhaps? It is immediately clear that it is not about the ignition (no spark), because if the ignition is faulty and there is no spark, the tool would simply not start. Means the fuel system remains.

Defects in the fuel accounting system are enough to determine a clear prerequisite, because of which the Stihl 180 chainsaw stalls when you press the gas, you need to carry out its full diagnostics. We advise you to read about the common malfunctions of the Stihl 180 chainsaw and the elimination of these defects.

Air filter

On the Internet pages, you can easily find information that the Stihl 180 chainsaw can stall due to strong contamination of the air filter. I would like to refute this incorrect information, and say that the Stihl MC 180 carburetor is equipped with an expansion joint, which is designed and installed if you set a goal to take the air needed for the normal operation of the chainsaw Stihl 180, bypassing a dirty air filter. Naturally, the power with a clogged air filter will fall off slightly, but it will definitely not stall. The power can also fall due to wear of the piston, here it will already be necessary to repair the piston Stihl MS 180 chainsaw.

Chainsaw Stihl does not idle stalls

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 the chainsaw isn’t picking up steam?

In cases in which the used gasoline saw is not able to steadily gain momentum and stalls spontaneously when you press the accelerator, you will need to carefully check the engine crankcase and carburetor. First and foremost, the operator should carefully inspect the assemblies to ensure they are not sealed. If a large amount of oil was found inside the crankcase or carburetor, then it is necessary to repair the leak inside the faulty unit.

The next reason due to which the chainsaw does not develop speed is a factory defect or mechanical damage to the breather located inside the fuel tank. A vacuum can form in the fuel tank, which leads to a lack of fuel supply to the working cylinder of the power unit. Deposits that have accumulated on the surface of the fuel cylinder can also cause this problem. In this case, you need to remove the filter element and rinse it in clean gasoline. If after that the chainsaw continues to stall under load, then you need to perform the following procedure: turn off the power unit of the chainsaw, remove the fuel tank cap and tighten it again. If after that the motor of the gas-powered tool starts to gain momentum and after 5 minutes of operation it stalls again, then the cause of the breakdown is a faulty breather.

A thick layer of carbon deposits on the walls of a factory muffler is another common cause of a saw motor not rotating. Resinous deposits and ash will prevent exhaust gases from escaping, which will lead them back to the engine compartment. As a result, the engine will begin to emit extraneous sounds and greatly lose speed even with a slight press on the accelerator.

What to do, if the chainsaw itself is gaining momentum?

This malfunction is typical for novice gardeners who ignore the need for timely maintenance of their gas powered tools. In the case of an arbitrary set of revolutions with a chainsaw, the cause must be sought in the carburetor. First of all, it will need to be completely disassembled. After making sure that all the built-in parts are in good working order, you can start flushing the fuel unit. For this you need:

Place all carburetor elements in a container with clean gasoline. After knocking, the parts must be removed, rinsed thoroughly with water and dried;
The fuel pipes must be blown out with compressed air from a cylinder. Immediately before re-installing the hoses, silicone sealant will be required at the points of their connection to the fittings;
After installing the carburetor, not the chainsaw needs to be re-adjusted. Before that, you need to make sure that the power unit is in good condition, as well as the filters, rubber gaskets and bushings are in working order.

In some cases, the cause of an arbitrary set of revolutions with a chainsaw may be a loss of sealing of the crankshaft oil seal. Due to constant contact with the moving shaft, the stuffing box lends itself to increased heating, which leads to the formation of cracks and holes inside it. A damaged gasket cannot be repaired, therefore it must be replaced.

Often the cause of air leakage, due to which an arbitrary set of revolutions by the motor occurs, is the loss of fixation of the bolted connections. In this case, the operator will need to tighten all the bolts and check the operation of the gas tool again.

The chainsaw doesn’t slow down how to find and fix a breakdown?

The most common cause of this frequent breakdown is an incorrectly adjusted damper. It is needed to suck in the air that the carburetor needs to enrich the fuel mixture with air. To adjust the choke, you need to adjust the carburetor operation. In this case, special attention should be paid to the operation of the power unit at idle. You can check the operation of the engine in idle mode by paying attention to the state of the circuit immediately after starting the engine. If it rotates, then you need to adjust the power unit.

Another reason for this typical malfunction is air leaks. If air leaks in one of the chainsaw mechanisms, the mixture will automatically deplete, which will lead to a spontaneous increase in the speed of the chainsaw motor. In this case, the operator will need to carefully check the entire fuel system, including the carburetor, pipes, and working chambers of the unit.

In some cases, the chainsaw does not decelerate due to a jammed accelerator cable. In this case, the power unit will independently gain momentum to the maximum immediately after it is started. Disassembling the gas handle and inspecting the entire gas supply mechanism will help solve the problem. A jammed cable will need to be adjusted or completely replaced.

Does not idle the chainsaw

The serviceability and efficiency of household and professional chainsaws largely depend on the degree of wear and tear of their main operating mechanisms. Several factors indicate damage to the working units of the gasoline tool, the main of which is the speed of the running engine. Their arbitrary growth or decrease can prompt the operator about a breakdown of the carburetor, violation of the clutch clearance and other malfunctions, this will allow to identify any of the breakdowns in time and eliminate it on his own.

Chainsaw does not idle search for causes and repair

There can be several reasons for this common breakdown. Basically, the loss of speed when the internal combustion engine is idling is associated with engine malfunctions, loss of compression in its standard cylinder, ignition system, carburetor, as well as improperly prepared fuel mixture. In search of the exact cause of a breakdown, the operator may encounter the following problems:

The accumulation of resinous deposits and ash, small debris on the air and fuel filters of the chainsaw, if possible, the 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;

A defect in the spark plug, cracks, chips or burrs disrupt the work of the part, which leads to a loss of engine speed when it is idling. In this case, the candle will need to be replaced;
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 assembly lose their original position, which leads to a loss of engine speed;
Cracks and holes in the fuel pipe to repair the chainsaw, the hose must be replaced;
Clogging of the inner walls of the muffler, dismantling, thorough flushing and reinstalling the muffler will help solve the problem. If large burrs have formed on the internal cavities of the element, then it will soon begin to rust. To prevent this, it is better to replace the muffler immediately;
Malfunction of the CPG of the power unit, the appearance of microcracks or burrs on the inner surface of the cylinder and piston will lead to loss of tightness of the working chambers. As a result, the amount of air required to enrich the fuel mixture will be disrupted; the result will be a loss of engine speed when idling.

The stable operation of a chainsaw engine largely depends on the quality and proportion in which the fuel mixture is prepared. An excess or lack of oil will lead to a gradual deterioration in the performance of the power unit and over time it will not be able to work even at idle speed. To prevent this, you need to strictly adhere to the ratio of gasoline and oil, which is indicated in the instructions for the chainsaw used.

For what reasons Stihl 180 stalls at idle or full throttle

Filter check

The first thing to check is the fuel filter.

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.

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 the carburetor, and 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 is 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 maintenance 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.

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 inform 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.

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 tool 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.

Sources:

http://sadovaja-tehnika.com/benzopily/oboroty/
http://benzopilok.ru/brend/stihl/ms-180-glohnet-na-holostom-polnom-hodu.html

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