For what reasons does Shtil 180 stall at idle or full throttle?

There are often cases when owners of chainsaws are faced with their breakdown and it does not matter at all what model of this type of equipment, since the nature of the breakdowns is almost the same for all. Well, the chainsaw has stalled, so what next? Undoubtedly, you can take the equipment to specialized services that will repair your “iron friend” for a fee. But as they say: why pay more?

After all, you can personally disassemble the instrument and repair it, since the damage may be insignificant, but in the service you will pay a lot for this. But naturally, in order to bring a tool back to life yourself, you need to be able to understand the reasons for its breakdown and how to troubleshoot it. So let's learn! In this article you can find answers to questions regarding situations when the tool simply stalls after directly pressing the gas. So let's get started.

Carburetor depressurization and nozzle blockage

Sometimes, when the screws securing the carburetor cover are loose or the gaskets have become unusable, the chainsaw may also experience a loss of power. To eliminate the possibility of this malfunction, it is necessary to check the integrity of the gaskets and the tightness of the screws on the carburetor covers.
To do this, you need to remove it from the engine (the algorithm is described above) and disassemble it. Defective gaskets must be replaced using spare ones from the repair kit for the Shtil MS 180 carburetor. In the case where a full check of the fuel supply and exhaust gas system has been carried out, but there are no results. The main fuel injector valve needs to be checked. To check, you need to knock it out of the carburetor body. All work should proceed according to the following algorithm:

1. The carburetor is removed from the chainsaw.
2. The four screws securing the cover with the compensator are unscrewed, after which the cover can be removed.
3. The carburetor is installed on a wooden lining, after which, using a bolt with a diameter of no more than eight millimeters and a length of 50, it is knocked out into the internal cavity of the carburetor.
4. Next, you need to select a small hose, the inner diameter of which matches or is slightly smaller than the outer diameter of the nozzle and put it on the nozzle.
5. The next step is to blow inside the hose. If it only blows in one direction, the nozzle is working properly; if it blows in both directions or does not blow at all, then the valve needs to be replaced.

All of the above actions should help in eliminating the problem associated with the fact that the chainsaw does not pick up speed, otherwise, a full diagnosis at the manufacturer’s service center will help.

Carburetor

The reason for the chainsaw to stop unexpectedly may be due to incorrect settings of the device. Your Stihl361 carburetor has three special screws. The first of them affects H (with its help, the highest speed is established), the second. L (adjusts idle speed) and 3rd S or LA (idle speed). Before starting, turn the 3rd screw counterclockwise 1-1.5 turns and start the pollen. If the engine does not stagnate, then look at the chain: it should remain motionless. If not, return the screw in the opposite direction until the chain stops. If the saw picks up speed very slowly when the accelerator is pressed, this can be adjusted using a motor driven by screw L.

Check options and adjust as needed

Why does a chainsaw stall under load?

Sometimes the chainsaw is unable to function properly under load. Most often this is caused by improper adjustment or leaking carburetor. In addition, the cause of this problem may be air leaks through the carburetor gasket or crankshaft oil seals. A tool that is unable to function under load will also not be able to reliably maintain idle speed.

Diagnostics begins with checking the carburetor and crankcase for leaks. If air leaks through the crankshaft oil seals are detected, they must be replaced. If air leaks are detected in the carburetor, installing a repair kit of gaskets is required to solve the problem.

If these actions do not lead to the desired result and the engine crankcase and carburetor are sealed, then you need to adjust the carburetor.

If a Husqvarna chainsaw stalls under load, then in case of any deviations in the functioning of the motor, you should first of all check the impulse hose, since this is the most common cause of failure of chainsaws of this brand.

Malfunctions leading to improper operation of the chainsaw

There are a number of defects that need to be taken into account when making a diagnosis, as they can lead to interruptions in the operation of the saw.

• Worn crankshaft bearings. When the crankshaft bearings are worn, mileage is inevitable on the main shaft where the flywheel is mounted. In such a situation, it is impossible to adjust the gap between the flywheel and the ignition coil, which leads to interruptions in sparking and unstable operation of the chainsaw.
• Impulse channels are dirty. The pulse channel serves to ensure the operation of the fuel pump; accordingly, its contamination will lead to incorrect operation of the pump and will make the operation of the saw impossible (it will start and immediately stop).
• CPG wear Usually, with excessive CPG wear, there is a decrease in compression in the chainsaw engine, which will certainly affect its ability to develop speed.
• Dirty fuel and air filters.

Chainsaw doesn't start well when cold

Violation of the sequence of actions when starting on a cold

If a new chainsaw does not start when cold, the reason may be the incorrect engine starting sequence. As a rule, each manufacturer, in the instructions for the chainsaw, indicates the procedure for starting the chainsaw when cold. Basically, it is similar for all two-stroke internal combustion engines that are installed on chainsaws, and represents the following procedure.

Closing the air damper (necessary to enrich the fuel during startup).

Fuel suction using a special primer for this (on some models of chainsaws, the primer is not provided by the design, and therefore this item is not available for them).

Turning on the ignition (if you forget about this, you may mistakenly consider the tool to be faulty).

Carry out several movements of the starter until the first “flash” of the engine (it is important not to miss this moment, otherwise it is possible to “flood” the engine). Set the air damper to the open position

Set the air damper to the open position.

Start the chainsaw engine.

4.1. Fuel problems

As in the case of difficult starting when hot, problems in the fuel system can also affect starting or the inability to start even when cold. Carburetor adjustment, contamination of the fuel filter and line are all reasons that cause starting difficulties.

Carry out diagnostics of the fuel system, this is the first thing you need when it is difficult to start when cold.

It is worth paying attention to the quality of the fuel, because... When using a mixture of gasoline and oil that contains a small amount of water, starting may be significantly difficult or impossible. The mixture must be used fairly fresh, because

When gasoline diluted with oil is stored for more than a month, its properties are lost and it becomes difficult to start, both on a cold and hot engine. Gasoline may burn poorly for this reason.

The mixture must be used fairly fresh, because... When gasoline diluted with oil is stored for more than a month, its properties are lost and it becomes difficult to start, both on a cold and hot engine. For this reason, gasoline may burn poorly.

4.2. Engine faults

CPG scuffing, ring sticking, CPG wear, air leaks through seals and gaskets, decreased compression, all these problems can make starting a chainsaw impossible or significantly complicate it. For example, if the CPG wear is not significant, the compression in the engine decreases. In this case, starting “cold” will be significantly difficult, or the saw may stop, the tool will start well.

It is quite difficult to accurately diagnose problems in the engine associated with problems in starting it, and it is better to contact a specialist in this field.

Basic elements of chainsaws

Before we begin to delve into the issues of tool breakdowns and repairs, let’s first figure out what the chainsaw itself consists of. First of all, I would like to note that this tool belongs to the category of equipment whose operation directly depends on the internal combustion engine.

It is also important that chainsaws are equipped with a single-cylinder engine , which runs on fuel such as gasoline. It is worth noting that, despite its similarity with other tools, it does not have a gearbox. And it is replaced by a kind of single-stage chain transmission, through which the chain (saw) itself moves.

In fact, a chainsaw is a fairly simple design, but this does not prevent it from being reliable, practical and capable of fully ensuring immediate uninterrupted and cyclic operation even in quite difficult conditions. This tool consists of a huge range of certain elements “vital” for its correct and productive operation. This is a carburetor, a direct chain tensioner, a tire equipped with a chain and other elements.

Before purchasing a chainsaw, be sure to explore all your options and choose the brand of chainsaw that suits you.

To make your choice easier, we have compiled a reliability rating of chainsaws for you.

If you have a limited budget, then read the article about Russian chainsaw manufacturers.

Muffler

You may ask, what is the first one? The answer is a muffler. The muffler is responsible for releasing exhaust gases and extinguishing their flame. All combustion products pass through it, which over time can clog it. The situation with a muffler clogged with soot is far from unique, and it occurs due to incorrect fuel consistency.

With the usual ratio of gasoline to oil, the combustion products are not so saturated with soot that they clog the muffler. In this case, if the amount of oil is more than normal, excess carbon deposits appear when it burns. Further, carbon deposits accumulate under the piston rings and in the muffler of the Shtil 180 chainsaw. Disassembling the Stihl chainsaw does not gain speed when you put pressure on the saw. Thus, a coked muffler is the safest thing that can happen; the greatest harm from excess carbon deposits is the need to replace the piston.

Winding device

Related Posts

The basis of this type of model, as well as all other chainsaws, is the carburetor. But since we are talking today specifically about the Shtil 180 chainsaw, we will not deviate from the topic. So. The carburetor in this model has a single adjustment screw , that is, it is a kind of idle speed adjustment screw. While the jet of the fully loaded load is stationary.

Chainsaw carburetor Stihl 180

KEY-DOP

In simple terms, we can say that it simply cannot be adjusted (see here), while the full load setting simply cannot be changed. It is important that the carburetor itself was configured at the factory in such a way that, regardless of the conditions under which the chainsaw is directly operated, the air-fuel mixture is supplied to the engine itself.

Malfunctions of the Ural chainsaw and how to eliminate them

When repairing a Ural 2t chainsaw, it is possible to eliminate any faults, including replacing the crankshaft, piston system, etc. Let's skip major and medium-sized repairs, and consider minor ones, which any untrained user can do.

Starts and stalls: what is the reason

There can be many reasons. But they always start looking from the simplest:

1. The fuel tank is running low.
2. The air filter is clogged with dust. A mixture that is too rich enters the combustion chamber and there is not enough oxygen to burn it out completely.
3. The breather - a tiny hole in the gas tank cap - is clogged. A vacuum is created in the tank, and gasoline is not pumped into the carburetor. The breather is cleaned with a thin needle.
4. The fuel filter at the bottom of the tank is clogged. It is pulled out with a wire hook along with the fuel hose attached to its fitting. But before doing this, you should remove the fuel supply hose from the carburetor. If gasoline flows out of it in a full stream, then the breather, hose and filter are clean.
5. Carburetor misadjustment. The fuel supply adjustment screw (not idle speed) is unscrewed a quarter of a turn and changes in the operation of the internal combustion engine are checked. If it gets better, unscrew it another quarter turn. If it gets worse, they twist it back. In any case, you need to remember how much the screw was unscrewed or tightened. It is better to adjust with the engine running and warm.

Repair and adjustment of the carburetor from the Ural 2T Electron chainsaw are presented in the following video:

Further problems with fuel supply are more serious:

• the carburetor holes, filters, and channels are clogged;
• The carburetor membrane has become unusable.

Diagnosing these problems will require disassembling the carburetor.

For reference: the Ural 2t Electron has a KMP 100 carburetor. There is experience when instead of it they installed a carburetor from the Chinese Viper Activia moped and even from the IZH Planet motorcycle. The difference in the volume of fuel supplied to the combustion chamber is stopped by adjusting the fuel supply screw. According to reviews, the Ural 2t Electron works better than with the original carburetor. Non-original carburetors do not fit the mounting studs. They are installed through adapters made of thick gaskets.

1. Poor contact with the spark plug in the spark plug cap.
2. When the internal combustion engine is running, the cap heats up and contact deteriorates. The temperature of the cap is tested by touch only with the engine turned off.
3. With other problems with ignition, the internal combustion engine either does not start at all, or “fires” due to an adjustment failure.
4. The cylinder exhaust ports or muffler are clogged with carbon deposits.

At low speeds there are few exhaust gases; they only need to exit through a narrowed passage. When the speed increases, the passage is small and the engine chokes. For a visual inspection, remove the muffler or the entire cylinder head. Contaminated parts are soaked in gasoline or special complex solutions and cleaned.

Saw chain jammed

Poor lubrication can cause some or all of the chain links to become stuck. The gearbox or clutch may jam due to heavy blockage or mechanism failure. The internal combustion engine does not have enough power to turn the chain and it stalls. They try to reach it by hand, if it doesn’t reach out, they look for the reason.

Won't start, but there is a spark

If there is a spark, problems in the operation of the ignition system can only be due to misadjustment. Spark in the Urals 2t The electron should flash when the piston has not reached T.M.T. 3.66 mm. If the fastening of the ignition unit is loose and it turns, the ignition is interrupted. It is checked by matching the two factory marks on the block and the body. If there is a spark and the ignition is adjusted correctly, then the reason is the above problems with the fuel supply.

No spark on the Ural chainsaw

The prefix to the name of the Ural 2t Electron chainsaw indicates that this model uses non-contact electronic ignition. The previous Ural saw had a mechanical breaker. According to reviews, the electronic ignition unit is one of the weak points of this chainsaw. Its thyristors and transistors are filled with a monolithic compound and cannot be repaired.

The unit often fails due to overheating and when the engine suddenly stops at high speeds. Therefore, it is strictly forbidden to turn off the chainsaw with the “Stop” button or by removing the spark plug cap at high speeds.

Where to look for the reason or where to start checking

All chainsaws have the same design and work on the same principle. The structure of a chainsaw can be found in this material. It doesn’t matter much what brand the instrument is - Shtil, Husqvarna, ECHO, Champion, Partner, Sturm and others. A malfunction that manifests itself in the form of a chainsaw stalling when you press the gas can occur equally on both expensive and high-quality tools and on budget Chinese devices. If a problem arises, it needs to be solved.

A chainsaw is a system of mechanisms consisting of parts. Any part in the mechanism can fail, which will lead to partial or complete failure of the tool. If the tool’s engine starts, this does not mean that the chainsaw is fully operational. When the engine stops working when the speed increases, there are corresponding reasons for this. In case of this malfunction, you should first pay attention to a number of the following tool mechanisms:

1. Gas tank - make sure there is fuel. If there is sufficient fuel, you should also check the serviceability of the fuel filter, the connection of the supply hose to the carburetor, and also make sure that the breather is working
2. Spark plug - if everything is in order with the fuel supply system, then you should check the serviceability of the spark plug. By the color of the carbon deposits on the spark plug electrodes, you can determine the cause of the breakdown. If the carbon deposits are brown, then the spark plug, ignition and fuel supply system are operating in the correct mode. The presence of black carbon deposits indicates an ignition malfunction, and if the electrodes are wet, then the carburetor should be checked

3. Muffler - over time, carbon deposits accumulate in the exhaust gas removal device, which helps reduce the throughput of the mechanism. If the exhaust gases have nowhere to go, they will interfere with the normal operation of the engine. In addition to a decrease in power, if the muffler is faulty, the engine will stop working when the speed increases

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

Why does the chainsaw not develop speed?

There may be several reasons for the lack of traction and poor speed of the chainsaw. Therefore, you should not immediately start disassembling and repairing the carburetor, since the reason may not be hidden in it.

The Shtil MS 180 chainsaw is equipped with a reliable carburetor, on which the manufacturer has limited the ability to adjust the power and maximum engine speed, so if the chainsaw loses traction, the carburetor is the last place to look for problems.

Muffler

You may ask, which is the first? The answer is a muffler. The muffler is responsible for exhaust gases and extinguishing the flames in them. All combustion products pass through it, which can clog it over time. The situation with a muffler clogged with soot is far from uncommon, and it occurs due to an incorrect fuel mixture.

With a normal ratio of gasoline to oil, combustion products are not so saturated with soot that they clog the muffler. If the amount of oil is more than normal, excessive carbon deposits will form during its combustion. Further, carbon deposits accumulate under the piston rings and in the muffler of the Stihl 180 chainsaw. Thus, a coked muffler is the most harmless thing that can happen, the maximum damage from excessive carbon deposits is the need to replace the piston.

How to check the muffler

To check the muffler, it must be removed from the chainsaw. To do this, using an 8 mm socket, unscrew the two fastening nuts and remove the part.

Important: after the muffler is removed, it is necessary to check the integrity of the gaskets between it and the cylinder, since very often they stick and break when the muffler is removed

very often they stick and break when removing the muffler.

You can clean the part mechanically, using screwdrivers or a knitting needle, and then blow it thoroughly with compressed air. The seat on the muffler can be cleaned with sandpaper to remove burnt parts of the gasket.

The muffler must be installed in the reverse order.

Important: when tightening the muffler mounting nuts, do not over-tighten the nuts, as the threads on the screws can be stripped

The threads on the screws can be stripped.

The second reason why a calm chainsaw engine may reduce power and not develop speed is a blockage in the fuel system. As a rule, the first place to start looking for a blockage is the fuel filter.

How to start a chainsaw correctly - follow the instructions

Before you move on to studying the causes and repairs of chainsaw malfunctions, you need to understand whether you are starting to work with your chainsaw correctly. After all, it is precisely because the tool is not started correctly that its engine stalls or does not start at all.

Start the chainsaw strictly according to the instructions in the operating instructions. The procedure is as follows:

• First, engage the chainsaw's chain brake by pushing its lever away from you;
• Remove the protective cover from the tool tire;
• Press the decompression valve, if provided in the design of the chainsaw. This will make starting the engine much easier;
• If the design of the chainsaw includes a fuel pump for manual pumping, press it several times;
• Place the combination throttle lever in cold start mode. To do this, lock the throttle trigger and lower the lever to its lowest position;
• Place the saw on a flat surface, removing any foreign objects from under its bar;
• Hold the chainsaw with both hands, placing your left hand on the handle and your right hand grasping the trigger cable. Place the toe of your right foot into the “eye” at the back of the chainsaw;
• Slowly pull the cable towards you until you feel resistance. Then quickly pull the cable towards you several times until you hear the motor start briefly;
• Move the throttle lever to the middle position;
• Pull the cable again several times until the engine starts;
• As soon as the engine starts running, sharply press the gas trigger and hold it for several seconds. At this time, move the throttle lever to its highest position;
• Raise the saw from the ground without touching the gas lever;
• Pull the chain brake handle towards you;
• Raise the saw over old newspaper to make sure there is oil flowing to the chain. If small spots of oil appear on the paper, then you can start working.

https://youtube.com/watch?v=mB_j_KfjGZw

Cleaning the fuel filter

If there is insufficient fuel supply, the chainsaw stalls when accelerating. The reason may be a clogged fuel filter and improper carburetor operation. How to check if the filter is at fault? To do this, you need to partially disassemble the tool body to gain access to the carburetor. Disconnect the fuel hose from it and press the fuel pump several times. On modern saws, this is a transparent rubber hemisphere that is pressed before starting the engine.

If gasoline begins to splash out of the hose vigorously, then the filter is in order. If fuel flows reluctantly, then you need to change or clean the filter.

It is located inside the gas tank, and to get it out, you need to remove the plastic protection, then use a flat screwdriver to pry off the rubber cuff through which the fuel line passes. You must remove it carefully so as not to damage the rubber. Otherwise, it will leak after installation. In some chainsaws, the filter is removed through the neck of the gas tank.

There is a fuel filter at the end of the fuel line installed in the tank. Usually it becomes clogged with tarry deposits found in gasoline and oil. The filter is pressed into the hose and can be removed by simply pulling it out. It must be washed in hot water with cleaning agents or replaced with a new one.

Calm WILL NOT START, what should I do?

If the initial inspection did not yield anything or the defects were eliminated during the search process, but the chainsaw still does not start, then you need to look for more serious reasons. It is best to identify and repair such breakdowns at a service center. However, if you have experience, you can find and eliminate them yourself. What to diagnose and check?

1. Compression in the cylinder;
2. Compression in the crankcase;
3. Carburetor operation.

In the first case, checking the compression in the cylinder will allow you to find out the condition of the cylinder-piston group (CPG) of a chainsaw that does not want to start when cold. To do this you need a compression gauge. The device is screwed into place of the spark plug and the engine is started idle. Measuring the readings allows you to judge the condition of the CPG. In the absence of a compression gauge, you can determine the compression in the cylinder offhand as follows:

• Place your finger on the spark plug hole;
• Try to start the chainsaw engine.

By placing your finger on the spark plug hole and pulling the starter, you can check the compression in the cylinder

If you feel that your finger is being pulled strongly into the spark plug channel, then everything is in order with compression. The absence of vacuum in the chamber indicates a malfunction. The cylinder-piston group needs a more detailed inspection, which will give an idea of ​​the condition of the piston and cylinder, piston rings and bearings.

A chainsaw may not start when cold due to a lack of compression in the engine crankcase. The main reason for this is damage to the gasket located between the cylinder and the crankcase. It is quite easy to detect a lack of compression:

• Disconnect the upper tube from the carburetor;
• Pour gasoline into a regular cork;
• We immerse the removed tube in the fuel;
• We pull the starter several times.

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If fuel is sucked out of the cap when the chainsaw starter starts, then everything is fine with compression. If not, look at the gasket.

Starting the tool may be complicated by improper operation of the carburetor or its breakdown. It often happens that during the sawing process the fastening screws become loose and air is sucked into the cylinder. Check that the carburetor is securely fastened. Inspect it for fuel leaks. There can be many reasons for the malfunction. It is possible to accurately determine the malfunction, eliminate it and fine-tune the carburetor only at a service center.

After going through a step-by-step troubleshooting of the chainsaw engine, you will be able to find the malfunction, fix it yourself and successfully start your working tool. Do not take on types of work that you are not confident in. Entrust troubleshooting and troubleshooting to specialists from the service center.

Basic malfunctions and ways to eliminate them

The tool must be used in accordance with the instructions supplied with it. The start button should be turned on only after the chain tension and the presence of the fuel mixture and oil have been checked. Having secured the chainsaw securely in your hands, you can begin to work.

If the tool refuses to work, then first of all it is necessary to identify the cause of the malfunction. And the most common equipment for repairing a chainsaw is suitable: various screwdrivers, socket and wrenches, hexagons.

Chain oil leaking

Every tool owner will face this problem sooner or later. The cause of this malfunction is a violation of the tightness at the junction of the oil pump and the hose from the oil tank.

To fix this problem, you will have to almost completely disassemble the chainsaw.

1. If the hose is damaged, it is best to replace it with a new one. You can try filling it with sealant, after degreasing and washing it.
2. Oil may leak due to a clogged or broken saw oil filter. It should be checked and cleaned or replaced.

If the chainsaw does not start

If you believe the experts, then in case of such a problem, the first thing you need to do is simply open and close the cap on the gas tank. After this, you need to ventilate the combustion chamber, and also remove and dry the spark plugs. These actions are often enough to get the tool started and working. If the malfunction remains, then the cause should be sought elsewhere.

1. The fuel supply is affected by the breather. Therefore, if it becomes clogged, a vacuum forms in the fuel tank and the saw does not start. Repairing the breather is very simple - it should be cleaned with a needle.
2. The Shtil 180 chainsaw may not work due to a broken cylinder. If there are chips or unevenness on the cylinder, then this is the reason.
3. If the tool does not start, holds power for a short time, or stalls immediately after switching on, then the cause of the breakdown may be in the muffler. It may be clogged with any deposits that occur during operation during the exhaust process.
4. The saw may not start well due to a faulty starter. To look at it, you should remove the cover from the carburetor and twist the special screen located behind the chainsaw drum. If the contact wire has come off the starter, it must be attached using a blowtorch. If the problem lies in an oil leak, then simply wipe the starter with a cloth.

The chainsaw engine runs intermittently

The cause of such a malfunction may be a breakdown of the cylinder-piston group, which can be easily repaired with your own hands.

To remove the cylinder from the tank, you need to unscrew the four bolts on its head. Then carefully check the piston, which should not have any burrs, scratches, or chips. If any are present, the piston will need to be replaced.

The optimal pressure in the combustion chamber is ensured by the piston and piston rings, which must fit fairly tightly on the piston body. If the piston inserted into the cylinder has free movement when rocking, this indicates its wear.

This defect can be eliminated by boring the cylinder and installing repair parts. However, the easiest way is to simply replace the entire set of CPGs.

Other reasons and solutions

If the chainsaw still does not start and the reason is not in the above details, you need to look deeper. Other common faults include:

Fuel pump failure;

Lack of impulse in the pipe channel from the engine crankcase;

There is no fuel supply from the carburetor;

Diaphragm rupture on the fuel pump;

Repair of the above faults can be carried out either independently, but of course it is better to give the chainsaw to a specialist; you can do the diagnostics yourself. When diagnosing, you should also check the following indicators:

Correct operation of the carburetor;

Optimal compression in the cylinder;

Compression in the crankcase.

Compression is checked both using a special device and manually. To “by eye” verify the presence of compression, simply remove the spark plug and insert a finger into the cylinder hole. Then crank the starter several times and if your finger is pulled into the hole, there is compression.

Video

Today, many manufacturers produce units for agricultural and construction work, among which the most popular is equipment manufactured by Shtil. The high level of quality is not the only reason why the products of this manufacturer are popular in the market. This was also facilitated by the affordable price and optimal power that the models of this brand have.

It seems that many people have had to use a chainsaw of a similar brand. And not just to use, but to regularly perform a wide variety of work and make sure of the high performance characteristics of this tool. This proliferation of these products is no coincidence, given that in addition to power, this instrument stands out for its graceful design. However, you need to remember that this is still a technique with a limited service life. Therefore, every owner of such a unit at some point is faced with the need for repairs. Next we will talk about the features of repairing the Shtil 180 chainsaw.

Reasons why a chainsaw stalls under load

This article from the construction site remstroisovet.ru will discuss the main reasons why a chainsaw may not start or stall under load.

The most common reasons of all are the following:

— Blockage in the chainsaw carburetor - if the chainsaw carburetor is severely clogged, then the engine simply does not have enough fuel, and it begins to stall under load. Consideration of this problem will be described below, but for now we move on.

— The chainsaw carburetor sucks in air. This is also one of the common reasons why a chainsaw engine lacks power. It’s all about the gasket, or more precisely, its tightness.

— Problems with the chainsaw’s clutch can also lead to it starting to stall. It is very easy to damage, or in other words “break” the chainsaw’s clutch, and repairs will cost a pretty penny.

— Poor quality fuel mixture often causes chainsaw breakdowns. This is especially true for those moments when the chainsaw has not been used for a long time and gasoline has been poured into it. The old fuel mixture should be drained and a new one should be added, strictly maintaining the correct proportions of two-stroke oil for lubrication.

What causes a chainsaw to lose power?

— The power of the chainsaw is not enough. This, as it may seem at first glance, trivial option for considering the problem cannot be discarded. But if you are sawing an old dry acacia tree or a thick wet log with a chainsaw, then the engine simply may not have enough power. This is especially true in cases where the chainsaw chain is too dull and requires immediate sharpening.

— Incorrect adjustment of the chainsaw carburetor. If you have already adjusted the carburetor of a chainsaw, you might have done something wrong, as a result of which the chainsaw began to stall under load. It is better to re-adjust the chainsaw carburetor and repeat it several times on a “hot” engine and always during operation, so to speak, under “load”.

— The chainsaw fuel filter is clogged. The next problem due to which the chainsaw will certainly stall under load is a severely clogged fuel filter. Remember how long ago you changed the fuel filter on your chainsaw and did you change it at all? If it hasn't been changed for a long time, then you shouldn't even get into the carburetor, because it won't help at all. First replace the old fuel filter, and then, if the problem does not go away on its own, adjust the carburetor on the chainsaw.

The same applies to the air filter; if this kind of problem occurs, it must be cleaned immediately. Now about the spark plug, if it is very dirty, it is also cleaned and adjusted if necessary. It is the incorrect gap between the electrode of the spark plug on a chainsaw that can lead to it starting to stall, and in general, to work extremely unstable.

Return under warranty and post-warranty service

Chainsaw maintenance includes:

• Monitor the quality of gasoline and oil on the basis of which you prepare the fuel mixture. Stick to the correct proportions when doing this;
• Do not use fuel prepared more than two weeks ago. Regularly check and clean the gasoline and oil tanks, otherwise the engine will stall or the saw will not start at all;

Chainsaw chain maintenance

• Clean the air filter regularly. It has a simple device and this operation will not require much effort from you;
• Turn the bar over every time after the next sharpening of the chain - this will extend the service life of the saw set;
• Regularly check and thoroughly clean the oil inlet and outlet ports, oil channel and guide bar groove. Remember that if the automatic lubrication system is faulty, your saw will start or stall;

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Your main assistant should be the instruction manual. If you have lost it, you can contact the dealer of the company whose chainsaw you use; they will provide you with instructions in electronic form.

So, before each time you turn on a gasoline chain saw, be sure to check that the chain is in good condition, whether its teeth are sharpened, and whether it is well tensioned (does not sag, but is not too tight, it can be pulled a little away from the blade).

You can sharpen the chain using a special machine or a file with a special template (depending on the tooth pitch of the chain, there are different templates).

Every time after use, the chainsaw must be cleaned: the chain, bar, air filter, housing, cooling fins, cracks and other grooves are cleaned of sawdust. After using the saw, turn the bar over so that it wears evenly, lubricate the sprocket (if there are grooves for lubrication in the front of the saw).

During long-term storage, be sure to drain the fuel and oil! The chain and the bus form an electrochemical pair, so they rust together and must be stored separately.

Why does a chainsaw stall when you press the gas?

Let's say the chainsaw operates normally at idle, but when you press the gas sharply it stalls. What could be the reason? It is immediately clear that the issue is not the ignition (lack of spark), because if the ignition was faulty and there was no spark, the tool simply would not start. This 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, it is necessary to carry out a complete diagnosis of it. We recommend reading about common malfunctions of the Shtil 180 chainsaw and their elimination.

Filter check

The first thing you need to check is the fuel filter.

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

Air filter

On the pages of the World Wide Web, you can find information that the Shtil 180 chainsaw may stall due to severe contamination of the air filter. I would like to refute this not entirely correct information and report that the Shtil MC 180 carburetor is equipped with a compensator, which is designed and installed in order to take in the air necessary for the normal operation of the Shtil 180 chainsaw, bypassing the dirty air filter. Of course, the power with a clogged air filter will drop slightly, but it definitely won’t stall. The power may also drop due to piston wear, which will require repair of the Stihl MS 180 piston chainsaw.

Carburetor

One of the reasons why a chainsaw does not develop speed when you press the gas, but rather stalls, is a malfunction of the carburetor. Let’s say the Shtil 180 saw worked properly, and then it was installed for a long time and was not used. Afterwards it was started, and at idle it works well, but when you press the gas it can stall. Why does it stall? The reason is a stuck carburetor valve nozzle. Of course, this is not 100%, but the probability of such a malfunction is high. We recommend reading the article about the design and repair of the Shtil 180 carburetor.

In order 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 the carburetor, then remove the air filter and the engine control lever, while disconnecting the air damper control rod from the carburetor. Next, you need to slightly pull the carburetor towards you and disconnect the fuel supply hose.

After removing the carburetor, you need to blow it out and clean it of dirt, only after that the carburetor can be untwisted.

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. Next, use an 8 mm bolt and a length of at least 50 mm. We knock out the valve.

After the nozzle is removed, you can blow it out using a compressor. The valve should only allow air to flow in one direction; if the valve can be freely blown in both directions, it means it is faulty and needs to be replaced with a new one. Reassembling the chainsaw after the valve has been repaired must be carried out in the reverse order of disassembly.

You can see clearly how a carburetor is repaired, or rather, how to correctly knock out the injector valve from the carburetor body by watching the video.

Another common reason why a saw may stall when the speed increases is air leaking into the carburetor. This can only be checked with a special tool, but it is worth noting that if preventive work has not been carried out on the carburetor for a long time, then you can install a new set of gaskets in the carburetor. In some cases, this helps solve the problem of 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.

General information

The characteristics of this saw are a source of pride for the German manufacturer. At the same time, the unit is a tool that is designed to perform a small amount of work. The tool is positioned for domestic use, which confirms the intensity of its use, which should not exceed 20 hours per month . Having such a unit at your disposal, it will not be difficult for you to maintain order in your garden, prepare firewood for the winter, and also clear areas. At the same time, he will be able to help you in solving other problems where there is no need to perform complex manipulations.

Main characteristics

The saw in question can be considered a compact option, because its weight is only 3.9 kg. At the same time, it has a large capacity oil and fuel tank. The device performs its operating functions using a two-stroke engine, the power of which is sufficient to solve simple tasks. In addition to this, during operation this tool does not create much noise, the level of which does not exceed 98 dB . For ease of understanding, it is enough to say that human speech creates noise at a level of 76 dB.

• The Stihl 180 chainsaw has a power of 2.6 watts. In principle, this is enough, remembering that we are talking about a tool for household use.
• The capacity of the oil tank is 0.145 l, the fuel tank is 0.25 l.
• The tire provided by the design has dimensions of 350 mm, with a pitch of 0.325 inches.

Winding device

As with other saws, the carburetor plays the role of the main starting device. Looking in more detail at the carburetor that the Stihl 180 chainsaw is equipped with, it should be noted that it has a single adjustment screw. In other words, it is a kind of idle adjustment screw . In this case, the jet, which bears the full load, is motionless all the time.

In other words, the regulation is not applicable to him. In turn, there is no way to influence the full load in any way. You also need to pay attention to the factory settings, due to which the air-fuel mixture is supplied directly to the engine. Moreover, this principle remains unchanged regardless of the operating conditions of the tool.

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Other reasons

Here, first of all, we mean wear of the cylinder, piston, rings, and crankshaft bearings. The failure of these elements ultimately leads to a drop in compression (pressure) in the cylinder. You can check the condition of the CPG at the same time when you remove the muffler. After dismantling this part, you will see a window through which part of the cylinder is visible. If nicks or scratches are visible on it, it will have to be replaced.

Parts for repair can be purchased in specialty stores or on the Internet.

Next you need to check the compression. If you do not have a special tool, remove the spark plug, plug the hole with your finger and pull the starter cord. With good pressure, the finger will be sucked inside. If you have a compression gauge, you need to insert it into the spark plug hole. Also crank the crankshaft using the starter and look at the instrument readings. The normal parameter is 8-9 kgf/sq. cm (which corresponds to 0.8-0.9 MPa). The reason for low compression may not necessarily be a worn cylinder or piston: sometimes it is enough to replace coked rings.

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Summing up

When the first signs of improper operation of the chainsaw appear, it is worth carrying out a full diagnosis. To avoid damage to the saw as a result of improper maintenance, it is better to entrust the work of identifying and eliminating engine malfunctions to professionals. And most importantly, you should not use a chainsaw with minor defects, as this will lead to even bigger problems.

For what reasons does Shtil 180 stall at idle or full throttle?

Any tool can break and the Stihl MS 180 chainsaw is no exception. Now let’s try to understand questions such as: why does the chainsaw stall when the speed increases, also at full idle. Let's look at options for diagnosing and eliminating defects associated with this behavior of the Shtil 180 chainsaw.

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Fuel

If its volume in the tank is insufficient, then the chainsaw will certainly be delayed. This is not difficult to find; the unit stops working in an inclined position, since the fuel pickup tube is located in an empty space. Add gasoline and oil mixture to at least one third of the total amount. The second reason is related to fuel. Its low quality, which in most cases is caused by incorrect proportions. Drain the mixture that was in the container and fill it with a new one, according to the instructions.

Why does a chainsaw stall when the accelerator is pressed - to summarize

When making an update on the reasons why the saw stalls after you press the gas, you need to take stock of the various circumstances and their elimination. Prerequisites can be roughly divided into two parts - ordinary and complex. It is necessary to start troubleshooting with ordinary circumstances and end with more complex ones.

It is absolutely necessary to start checking from the tank, not from the carburetor, but specifically from the gas tank. At the same time, make sure that you are using the correct mixture. Next, you need to check the serviceability of the muffler and the presence of carbon deposits on the spark plug. After which you will already have an idea of ​​​​in which part of the tool it is necessary to find a breakdown. There may be a breakdown in that. That you just need to turn up the highest speed, why do you need to adjust the carburetor. If this does not help solve the problem, then you should check the air filter and clean it.

Pay special attention to the carburetor, after cleaning and maybe repairing which the chainsaw should work like new. If even after this the problem remains, then don’t be lazy to check the compression value

Maybe the engine is very worn out and needs to be replaced.

At this point, the update to restore the functionality of the tool is completed, and it is necessary to note another such moment, such as the introduction of fuel, which is stored for a long time. Many people dilute gasoline with oil and store the mixture for months, and sometimes for six months. This cannot be done in any way, because the mixture has the characteristics of aging, and therefore, after its preparation, it must be used within 1-2 weeks. If you do not follow this recommendation, it will often be necessary to change not only the fuel filters, but also clean the carburetor, but the worst thing is that this will contribute to accelerated wear of the CPG.

Filter check

The first thing you need to check is the fuel filter.

In some cases, a filter clogged with dirt is unable to pass through the fuel mixture in sufficient quantities. Accordingly, a lack of fuel appears in the system, which leads to the fact that when you press the gas of the chainsaw, the fuel burns out, and new fuel does not yet have time to arrive, as a result of which the STIHL chainsaw stalls. Also, if the fuel filter is clogged, there may be a noticeable drop in the power of the chainsaw at high speeds, but this is with minor contamination.

The STIHL 180 chainsaw starts and stalls.

• reduced filter capacity (gasoline and air);
• abnormal operation of the ignition system:
• the carburetor settings changed spontaneously;
• malfunction of fuel line elements;
• exhaust channels and muffler are clogged;
• defects of the piston, cylinder, valves.

Repairs should begin with an external inspection and checking the presence of fuel in the tank.

Air filter

On the pages of the World Wide Web, you can find information that the STIHL 180 chainsaw may stall due to severe 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 a compensator, which is designed and installed in order to take in the air necessary for the normal operation of the STIHL 180 chainsaw, bypassing the dirty air filter. Of course, the power with a clogged air filter will drop slightly, but it definitely won’t stall. The power may also drop due to piston wear, which will require repair of the STIHL MS 180 piston chainsaw.

No spark

If the chainsaw does not start, and you have not experienced any particular difficulties before, the first thing to do is check the spark plug. There may simply be no spark between its electrodes; this can only be determined after removing the spark plug. We check its functionality; to do this, we stick the spark plug into the cap of the high-voltage wire, and place the metal side of the spark plug on the cylinder (or other metal object). Now we do several manipulations with the starter, and if during them no spark is observed, the problem is specifically in the spark plug.

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Attention : you must make sure that the ignition is on, otherwise the spark plug will not show a spark in any case. Also, to make sure that it is the spark plug and not the ignition coil that is faulty, take a similar spark plug and check for a spark on it. If present, the problem can be solved by simple replacement.

Ignition coil malfunction

Repairing the ignition coil is impossible; its design cannot be disassembled. But you can only check the performance of a part with a special device. If there is no spark to the spark plug, do not immediately blame the ignition coil; carry out diagnostics. Some people mistakenly run to the store for a new reel, so first make sure it’s broken and then make a new purchase.

Supplying fuel to the chainsaw

If the Shtil 180 does not start, there is a spark, then first of all we check the presence of fuel in the chainsaw tank. Of course, the problem is funny, but quite common. Next, we check whether fuel is entering the carburetor; to do this, you can disconnect the gasoline hose from the carburetor and pump in gasoline. After several manipulations, gasoline should come out of the hose, but not in a large stream, but in small jerks. If gasoline does not flow or flows poorly, the problem may be the following:

The fuel supply channel is clogged;

The fuel filter is clogged directly.

Read the article that describes why gasoline does not flow into the chainsaw. The described tips apply to Shtil 180.

As unusual as it may sound, even a too full fuel tank can cause this. If the pressure is high, the fuel hose may be squeezed out or the required vacuum may not be created. Be sure to monitor the quality of the fuel used; for proper operation, never leave the chainsaw with gasoline for more than 2 weeks. Long-term storage of fuel in the tank contributes to the creation of resins and the process of polymerization of components.

Faulty crankshaft bearings

If the Shtil 180 does not start and the fuel flows correctly, you will have to look further, namely into the crankshaft. Its bearings tend to wear out, which causes play to appear when you try to shake the flywheel. The fact is that in the presence of backlash, the flywheel magnets are attracted to the ignition coil, or rather to its contacts.

Repairing and replacing bearings requires disassembling the engine, so this work should only be performed by skilled workers or people with experience. You should not disassemble the engine if this is your first time.

Floods the spark plug

In some cases, the Shtil 180 starts and stalls, or does not start at all. Then we check the condition of the spark plug; it may be flooded. There can be two reasons for this “overflow” - improper starting of the engine when cold and a malfunction of the carburetor. We are trying to solve the problem with the following steps:

Remove the spark plug;

We turn the chainsaw over to the other side and wait until the excess fuel flows out;

To be sure, we pull the starter several times, so that gasoline will certainly come out of the cylinder;

We return the spark plug to its place, install the cap and try to start the engine again with the starter.

There is a spark, the spark plug is wet

First of all, it is necessary to remove the muffler and carefully inspect the piston, since this is where the problem may be hidden. but the chainsaw still does not start or stalls, the saw does not start, Partner 350. In addition, most owners wonder: why does the chainsaw start and stall, while there are supposedly no problems with the spark plugs?

But this is an erroneous opinion and you don’t need to be so sure in this case, as there are situations when the candle sparks perfectly in air, but does not work directly in the cylinder.

The reason for this may be a direct violation of a kind of compaction in the canal area (impulsive). Or so there is a peculiar development of crankshaft oil seals, but this feature occurs in very rare cases.

The Shtil ms 660 chainsaw is the most economical of the entire Shtil chainsaw line. Its price ranges from 3,100 to 5,500 rubles.