Stihl 180 Saw Stalls At Idle

For what reasons the Stihl 180 stalls at idle or full throttle
Why the Stihl 180 chainsaw stalls when you press the gas. Description of the reasons, methods of troubleshooting. About carburetor repair.

For what reasons the 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 understand such issues 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 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 this is not about the ignition (no spark), because if the ignition is faulty and there is no spark, the tool would simply not start. This means that the fuel system remains.

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

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 leaking 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 branch pipe.

Stihl 180 saw stalls at idle

Not enough fuel to feed and run the chainsaw at full power

If the chainsaw stalls when gas is added, it means that fuel is not supplied in sufficient quantity for the proper operation of the chainsaw. This may be due to both clogging of the carburetor (its jet) and contamination of the filter itself (fuel). Remember that the first node should be checked exclusively by professionals, but you can clean the second one yourself.

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Cylinder-piston group

Quite often the Partner chainsaw stalls when pressed and the reason for this is cylinder-piston group. Since by examining them, namely the piston and cylinder, you can easily determine the cause of the malfunction of the tool, directly replacing them. You can also make a direct boring of the cylinder itself relative to the size of the new piston.

But if after inspection you find that both the piston and the cylinder are not damaged, then the reason may lie directly in the rings (piston). For this kind of check, it is necessary to insert a piston into the cylinder and gently start swinging it by means of a connecting rod. If suddenly you feel a play, then the rings need to be replaced, since they have already worn out.

Silencer as the cause of the saw stalling under load

Here’s another reason why the chainsaw stalls when you press the gas. Muffler. It is this part that can interfere with the full operation of the tool in cases where it is contaminated directly with exhaust resinous deposits. To do this, you just need to clean it.

Filter check

The first thing to check is the fuel filter.

In some cases, a filter 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 insignificant contamination.

Stihl 180 stalls

Carburetor

One of the reasons why the chainsaw does not develop speed when you press the gas, but rather stall, is a malfunction of the carburetor. 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 towards you a little and disconnect the fuel supply hose.

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It is necessary to remove the fuel hose as carefully as possible, and prepare a plug for it in advance, since fuel should flow from it.

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. We knock out the valve.

It is necessary to knock out the valve by installing the carburetor on a wooden stand, this will ensure its protection from damage to the body.

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. Collecting the chainsaw after the valve has been repaired must follow the reverse order of disassembly.

You can clearly see how the carburetor is being repaired, or rather how to properly knock out the injector valve from the carburetor body by looking

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 with 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.

The car stalls at idle: possible causes

It follows from this that various problems with the main components of any internal combustion engine lead to malfunctions: fuels and lubricants, the ignition system, the quality of the air-fuel mixture and compression inside the cylinder.

The main engine faults include the following:

  • The motor does not start;
  • Starts up, but, working unstably, quickly stalls at idle;
  • The chainsaw works fine at idle, but stalls under load.
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The reasons for idle speed violations can be different. But all of them can be reduced to several general positions. So, ICE malfunctions are caused by such problems as:

Internal combustion chainsaw engine.

Possible clogging of the fuel and air filter;

  • Defect or malfunction of the spark plug;
  • Violation in the initial settings of the carburetor caused by strong vibrations during the operation of the mechanism;
  • Gas line defects;
  • Incorrect ratio of ingredients in the “fuel mixture”;
  • Muffler contamination;
  • Malfunctions of the cylinder-piston group.
  • What to do if a chainsaw stalls?

    Builders, installers, rescuers and summer residents. All of them, sooner or later, completing their tasks, take up the chainsaw. And the final result of their activity largely depends on how reliably this tool will work.

    The chainsaw is used to cut wood.

    It is worth noting that the chainsaw belongs to relatively simple devices. Nevertheless, it, like other mechanisms, periodically fails. When a chainsaw stalls while idling (this is one of the most common malfunctions), the biggest problem is to determine the reasons for this behavior of the device. If the source of the “disease” is correctly installed, it will not be so difficult to return the apparatus to a working position.

    Therefore, the first step is to find out what kind of malfunctions there are with a chainsaw and what leads to engine stops at idle.

    Problems associated with improper operation of the fuel system

    The chainsaw periodically stalls at idle speed also due to a violation of the integrity of the fuel line or an incorrect ratio of the ingredients of the “fuel mixture” consisting of gasoline and oil.

    Before each switching on of the cutting mechanism, it is necessary to visually inspect its blocks and assemblies, paying attention to possible defects in the surface of the body, mechanical damage, and leaks of working fluids. This also applies to the saw fuel line, which is usually a rubber tube.

    If the device was (especially for a long time) in a damp place and it had to withstand sharp fluctuations in air temperatures, this tube could simply crack. This fuel line is not suitable for further use and should be replaced.

    Another reason why a chainsaw can stall at idle speed is non-compliance with the ratio of ingredients when preparing the “fuel mixture”. The proportions of gasoline and oil included in it must exactly correspond to the proprietary instructions for a particular device. If they are not observed, the engine will not be lubricated sufficiently and the entire mechanism will stall persistently.