Stihl ms 180 chainsaw DIY repair

In detail: Stihl ms 180 chainsaw DIY repair from a real master for the site my.housecope.com.

Chainsaw "Shtil 180" has proven itself well in the construction market. This portable device has a power of 1400 W and a motor volume of 31 cc. see The length of the saw chain is 350 mm, at idle speed it makes more than 2 thousand revolutions. Its popularity among consumers is also explained by the acceptable cost of the tool. However, when using a chainsaw, malfunctions occur from time to time. In the service, repairing a tool is not cheap, so those who understand at least a little technical issues fix breakdowns with their own hands.

The operation of the tool must be carried out in accordance with the instructions attached to it. Include start button only after the chain tension, the presence of a fuel mixture and oil have been checked. Having securely fixed the chainsaw in your hands, you can get 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 tools for repairing a chainsaw are suitable: various screwdrivers, socket and wrenches, hexagons.

Sooner or later, every tool owner will face this problem. The cause of this malfunction is a leakage at the junction of the oil pump and the hose from the oil tank.

To eliminate this problem, you will have to practically completely disassemble the chainsaw.

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

If you believe the experts, then with such a problem, first of all, you just need to open and close the lid on the gas tank. After that, you need to make combustion chamber ventilationand remove and dry the candles. These actions are enough for the tool to start up and work. If the malfunction remains, then the cause should be sought elsewhere.

The fuel supply is affected by the breather. Therefore, if it becomes clogged, then a vacuum forms in the fuel tank and the saw will not start. The breather is very easy to repair - it should be cleaned with a needle.
Chainsaw "Calm 180" may not work due to cylinder breakage. If there are chips or irregularities on the cylinder, then the reason is in it.
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 can be clogged by any deposits that occur during operation during the exhaust process.
The saw may start poorly due to a malfunctioning starter. To see it, 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, then it must be attached with a blowtorch. If the problem lies in an oil leak, then the starter is simply wiped with a cloth.

Video (click to play).

The reason for such a malfunction may be breakage of the cylinder-piston group, which is easy enough to repair with your own hands.

To remove the cylinder from the tank, four bolts must be unscrewed on its head. Then carefully check the piston, on which there should be no scoring, scratches, chips. If 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 sit tightly enough on the piston body.If the piston inserted into the cylinder has a free stroke during rocking, then this indicates its wear.

You can eliminate this defect by cylinder bore and installation of repair parts. However, it is easiest to simply replace the entire CPG set.

What to do if the instrument stops winding up, starts to stall, loses power, does not keep idling? Quite often, the cause of such breakdowns lies in the carburetor, which could become clogged with dust, dirt or sawdust. You can cope with this problem with your own hands.

All carburetors are cleaned in the same way, the main thing is not to be afraid and not to lose anything. For repairs you will need to prepare:

any brush;
Phillips screwdriver
head 8;
some gasoline.

First of all, with the help of a brush, dirt and dust are cleaned. Then the cover and filter are removed. The two nuts of the air filter are unscrewed, and the air collector housing is removed. The carburetor and throttle and throttle rods can now be seen. By lowering the throttle with your finger downward, you will need to remove the throttle lever.

To move the carburetor out of the seat, first remove the choke lever and completely close it. Now you need to remove and pull the engine stop wire. It is also necessary to remove the plastic arm to which the wire is attached. On the right, it is inserted into the hole, and on the left, it can be lifted.

The carburetor is released and can be removed and cleaned. It is best to do this with a compressor, but if it is not there, then the details can be rinse in clean gasoline.

Do not forget about the fuel filter, which must also be removed and the fuel hose blown through. Everything is put together in the reverse order.

If, after assembling the carburetor, the saw does not start well, and smoke comes out of the muffler, then most likely the spring under the needle lever has been lost. Due to the absence of this spring, the needle does not shut off the fuel supply, so the spark plug is “flooded” with gasoline. Of course, in order to eliminate this malfunction, you should find the spring and put it in place.

When repairing a carburetor, it should be remembered that it is a rather complex assembly, which consists of various small rings and parts. Therefore, it must be cleaned and repaired with extreme care and attention.

If the chainsaw does not start or stalls, then in addition to the carburetor itself, you should check spark plug performance... If it is faulty, then it should be unscrewed and dried. Also, excess fuel must be drained from the spark plug through a special hole.

It must be remembered that drying must be carried out for at least thirty minutes, after which the candle is installed in place and the tool starts up.

The cause of the malfunction may be a weak contact between the end of the spark plug and the high-voltage wire. If you don't like the work of the candle at all, then it is better to replace it with a new one.

Such parts of the "Calm 180" chainsaw, such as anti-vibration elements, a chain, a tire, a drive sprocket, wear out faster than others. Therefore, it is recommended to keep spare parts in the workshop for quick replacement.

Eliminating the causes of chainsaw malfunctions with your own hands will, in any case, be cheaper than repairing a tool in a service workshop. In order not to puzzle over why the tool stopped working, you can watch a video instruction on how to eliminate various breakdowns of the "Calm 180" chainsaw. However, in case of serious breakdowns, it is better not to do the repair yourself, and entrust the work to a specialist.

Despite the many varieties of modern building materials, wood remains the most demanded. In this regard, chainsaws are in great demand among fellers, owners of their own houses and summer residents.

Among the huge variability of the model range, the most popular among both amateurs and experienced foresters for many years has been the calm 180 chainsaw, which is distinguished by its simple maintenance, repair and operation. The Stihl company was founded more than 9 centuries ago and began production of gasoline chain saws back in 1926. Thanks to many innovations, simplicity and durability, the tools of this manufacturer are in demand on the world market of woodworking equipment.

Before starting work on the diagnosis of malfunctions and their elimination, it is necessary to prepare the necessary tools.

General view of the Stihl MS 180 chainsaw with the main units

Due to the fact that the chainsaw is a relatively simple unit, the list of accessories includes the following items:

a set of flat and Phillips screwdrivers;
open-end locksmith keys;
candle key;
set of sockets with a knob
Multifunctional tool Stihl.

Multifunctional tool calm

In order to qualitatively eliminate the emerging breakdowns and restore operational indicators, it is necessary to establish as accurately as possible the malfunction preceding the failure of the unit. Following from the fact that the chainsaw is equipped with an internal combustion engine (ICE), the main causes of breakdowns should first of all be looked for in the power unit.

Before starting work, it is necessary to turn off the engine, let it cool down and exclude the possible start of the chainsaw. It is recommended to wear cotton gloves to protect your fingers.

The most common faults when repairing a chainsaw calm 180 include:

the engine does not start;
the operation of the motor is intermittent, with a short operation of the chainsaw, it spontaneously stalls;
oil leaks near the chain lubrication mechanism;
the engine does not develop full power.

Frequent breakdowns of the transmission part of the saw include rupture of the chain links. You can independently restore its integrity by riveting the links or replacing it with a new one.

Despite the relative simplicity of the design and the absence of complex mechanisms, experts recommend searching for faults in a specific order. First of all, the presence of a mixture in the fuel tank is checked, and if everything is in order with the liquid level, it is necessary to proceed to inspecting the chainsaw start unit. If this mechanism is also in good condition, it is necessary to check the performance of the spark plug.

After the performed manipulations to diagnose the spark plug (determining the presence or absence of carbon deposits, the correct gap between the electrodes, the state of the sealing ring), we turn our attention to the carburetor. Small sawdust, dust and soil particles often clog the fuel system.

If cleaning the carburetor of the stihl 180 chainsaw did not help to restore the previous performance of the unit, the reason probably lies in the cylinder-piston group (CPG). The power unit belongs to the most complex mechanism of the tool, the diagnosis of which requires almost complete disassembly.

The first step in diagnosing the fuel supply system is to check the level of the fuel mixture in the tank.

The main nodes of the fuel system of the chainsaw 180 calm

Even if the owner is confident in the presence of gasoline, this allows you to eliminate the vacuum created as a result of a clogged bypass valve. It is designed to optimize the pressure in the tank with fuel consumption. For the convenience of cleaning the breather, chainsaws use a regular medium-sized sewing needle.

When inspecting the fuel system, you should pay attention to the integrity of the pipes, the tightness of which can be violated by mechanical damage or prolonged operation of the unit. Sometimes the cause of the mixture flowing out and, as a consequence, the incorrect operation of the engine, is the wear of the rubber gaskets and the primer (suction button). In this case, to repair a calm 180 chainsaw with your own hands, you need to purchase a repair kit of seals and replace them.

The cause of problems with a chainsaw of this model may be the inoperability of the ignition system and the engine start unit. Image - Stihl ms 180 chainsaw DIY repair

General view of the ignition of a chainsaw 180

If, when measuring the gap between the flywheel and the module, no deviations are found, you must pay attention to the spark plug.

Most manufacturers, including calm chainsaws, recommend setting a clearance of 0.2 mm. This requires a coin, coin wire, or flat dipstick, which can be purchased at any automotive store.

Chainsaw starter Calm 180 assy

Having dismantled the candle from the mine, we measure the gap of the chainsaw candle between the central and side electrodes. If its value is excessive (more than 0.7-1.5 mm), a spark may occur periodically, and if it is minimal (less than 0.7 mm), it may be insufficient for optimal ignition of the fuel mixture.

If gasoline enters the combustion chamber, and no inconsistency in the ignition system has been identified, the carburetor may be the likely cause of failure. This unit is designed to mix fuel with air and supply them to the cylinder. After dismantling the carburetor, we clean its channels and jets using universal tools.

It must be remembered that the carburetor consists of many small parts, and therefore its dismantling, disassembly and cleaning require special care.

After diagnosing the ignition system of the chainsaw calm 180 and its restoration, we proceed to troubleshooting the power unit, namely in the cylinder-piston group of the saw.

During operation, parts of the cylinder-piston group of the saw fail due to friction forces, high temperatures and loads. If the tool does not reach full power at startup and stalls at idle speed, a possible problem could be damage to engine parts. To disassemble the power unit, it is necessary to unscrew 4 bolts and remove the cylinder. The owner is required to carefully inspect its inner work surface for chips, nicks and cracks.

Even the slightest damage to the "mirror" of the cylinder can negatively affect the compression of the chainsaw engine and its performance.

Cylinder-piston group of the Stihl MS180 chainsaw

When diagnosing an internal combustion engine, we also perform a visual inspection of the piston and compression rings. Made of aluminum alloy and cast iron, respectively, they are more exposed to abrasion loads than a steel cylinder. In case of breakage and excessive wear of the piston rings, they must be replaced.

If, upon visual inspection, the ovality of the cylinder working surface is observed, it will need to be bored. To do this, we measure its diameter over a larger size, select the piston and perform the subsequent machining.

In the process of sawing wood, the cutting part of the tool is subjected to high loads. In order to reduce frictional forces and the subsequent wear of the chain, the chainsaw calm is equipped with a lubrication system that gradually supplies oil to the tire. The rapid loss of cutting properties by the teeth and the absence of traces of lubricating fluid may indicate its leakage or clogging of the pipes. Image - Stihl ms 180 chainsaw DIY repair

Stihl 180 chain lubrication principle

First of all, when diagnosing the chain lubrication system for the ms 180 chainsaw, we pay attention to the oil supply hoses and their fixation points. Damaged connections cannot be repaired and must therefore be replaced. The oil passages can be cleaned with compressed air. For these purposes, we use a compressor or an ordinary car hand pump.

Due to its ease of operation and repair, the chainsaw of this model has gained wide recognition among professionals and amateurs in the field of woodworking.

To work on your personal plot or private house, farm or construction, you need such a versatile tool as a chainsaw.Wood has always been, is and will be an actual building material, for the processing of which such a unique device is needed. The chainsaw is also indispensable for preparing firewood, pruning green spaces, landscaping and running your own household.

Chainsaw Calm MS 180 designed for inexperienced usersso that the operation of this tool is as easy as possible. This chainsaw is lightweight and convenient to use, and also has a low cost, due to which it is in great demand among the population. With intensive use of the tool, wear of the parts occurs, which leads to the occurrence of tool malfunctions. Some of the most common and typical faults can be corrected by hand at home.

For troubleshooting chainsaw you need to have the appropriate tools. This list should include the following tools:

set of wrenches;

set of socket wrenches;

Screwdriver Set;

needle.

Before proceeding with the troubleshooting of the chainsaw, you need to accurately establish the causes of the malfunction and localize the place of failure... Since the chainsaw has an internal combustion engine, it is logical to assume that the main malfunctions will be associated with this particular device. Most often during the operation of the saw, the following malfunctions occur:

malfunctions of the ignition system;

malfunctions of the fuel system;

malfunctions of the cylinder and piston group;

muffler malfunctions;

Malfunctions not related to engine operation are also common. These include the following malfunctions:

brake and clutch malfunctions;

malfunctions of the chain lubrication system;

breakage of the starter cord;

wear of the drive sprocket.

Troubleshooting engine operation should be started by checking the level of gasoline in the fuel tank. If the fuel level is normal, we start to check basic chainsaw systems. Image - Stihl ms 180 chainsaw DIY repair

Problems in the ignition system of a chainsaw can be judged by the following signs:

The engine will not start;
the engine starts, but stalls almost immediately;
the engine is unstable;
does not develop full power or stalls.

Checking the ignition system start by inspecting the spark plug. The plug must be clean, free of carbon deposits and not filled with a fuel mixture. The gap between the electrodes should be 0.5–0.65 mm. The carbon deposits from the candle can be cleaned off with a sharp awl; the electrodes should be cleaned with fine sandpaper.

Launch problems can also occur due to damage to the spark plug gasket or wear. Next, we check the spark plug. To do this, you need to connect a high-voltage wire to it and, holding the candle with pliers with insulated handles, attach it with a thread to the cylinder. Pulling the starter cord to check for a spark. If there is no spark, then the spark plug should be replaced. If there is no spark on the new candle, then the problem should be looked for in the high-voltage wire.

Problems with the Stihl chainsaw fuel system can sometimes be determined by the state spark plug... So, if the candle remains dry during inspection, then this indicates that the fuel mixture does not enter the cylinder. The most common cause is a clogged fuel filter. For repairs, you need to remove the fuel hose from the carburetor and see how the fuel runs. If the trickle is weak, remove the fuel filter through the fuel filling hole and clean it. If the filter is heavily soiled, it is recommended to replace it with a new one.

Another common problem is clogged breather... The breather is a small hole in the gas tank cap, you need to use a needle to clean it. An insufficient amount of the fuel mixture may be due to a clogged air filter, in which case the air does not flow in the required volume, fuel mixture turns out to be too rich, which leads to unstable engine operation.To eliminate the malfunction, the filter must be removed, thoroughly rinsed and dried and reinstalled.

If these methods do not help to fix the problem, then there may be a problem with improper carburetor adjustment. Carburetor adjustments should be carried out with clean air and fuel filters. On most carburettors, adjustments are made using three special screws: maximum rpm, minimum and idle adjustment. Maximum speed screw denoted by the symbol H, it controls the main jet. Screw L is designed to adjust the minimum speed and controls the idle jet. The S screw is used to fine-tune the idle speed.

Sometimes in carburetors there is two adjustment screws, which is done to simplify the setup. Exact carburetor setting data you need to take from the operating instructions, but it is better to entrust this operation to specialists, since this is a very difficult and responsible job.

If the engine does not develop full power or will not start, the problem may be insufficient cylinder pressure. This can be due to cylinder wear, crankshaft bearings, and piston ring sinking due to piston wear. If you remove the muffler from the calm, you can visually assess the condition of the cylinder and the piston group by looking into the hole from the muffler. The overview will be small, but you can get an idea of the state of the cylinder and piston.

For a more accurate diagnosis, you can use a compressometer, which is installed in the spark plug hole. By turning the starter, we determine cylinder pressure... The pressure with a working CPG should be about 8-9 atmospheres. A decrease in pressure leads to a decrease in the power of the calm engine. To determine the complete picture of the state of the CPG, it is necessary to completely disassemble the engine by disconnecting the crankcase from the cylinder and inspecting the piston. To perform this work, you need to study the design of the calm 180 chainsaw; it is also recommended to watch videos of this work on the Internet. Reassemble the engine upside-down.

If the engine runs normally at idle and stalls when the engine speed increases, it is likely that the muffler is the cause. The muffler can become clogged with combustion products and close off. exhaust outlet and, as a consequence, the engine does not reach its maximum rpm. The reason may be excess oil in fuel, as well as unsuitable or low-quality oil. To eliminate the malfunction, the muffler must be removed, cleaned of carbon deposits and washed with detergents.

The reason for the failure of the calm 180 operation can also be malfunctions in the chain brake... Most often, the space under the gearbox cover is clogged or the brake band wears out. In case of clogging, remove the cover and thoroughly clean the interior. Repair in case of wear of the brake band consists in its replacement.

Often, oil leaks are visually visible in the chain drive unit, which leads to incorrect operation of the calm. To eliminate the problem, you need to check the quality of the connection of the oil pump fitting and the tube, inspect them for cracks. If cracks are found, the parts must be replaced or sealed with sealant. If there is not enough oil on the chain, then it is necessary to clean the channels for supplying lubricant, which happens quite often.

If the chain spins almost constantly on the chainsaw, while the engine sometimes runs unstable, then the fault should be looked for in the clutch. It could be a broken spring, or a piece of the clutch cam could break off. The malfunction can be eliminated by replacing this unit.

During the operation of the chainsaw, parts wear out unevenly. To maintain the functionality of the device, it is necessary to timely replace worn parts, such as a chain, leading sprocket, bus and others. In this case, the Stihl 180 chainsaw will work trouble-free for a long time.

Chainsaw Calm is a tool that is designed for harvesting wood, processing plants, creating landscaping and other household needs. In the event of a breakdown of any parts or failure of the device, you will need to repair the Stihl chainsaw.

The chainsaw must be used according to the operating instructions, then it will last a long time and will not fail. All possible malfunctions of the Stihl chainsaw can be identified and eliminated independently. Consider the main problems that may arise in the components and design of the device, and how to repair the Stihl 180 chainsaw with your own hands.

If you notice that Calm is pouring a candle on the Stihl chainsaw, then a malfunction may have occurred in the fuel system. The engine must run on a mixture of gasoline and oil. If the mixture is lean, then there is a decrease in power, the cylinder overheats and the saw systems wear out. A wet plug on a Stihl chainsaw is due to a disproportionate fuel mixture. Lack of air in the mixture prevents correct combustion of the emulsion.

The use of low quality gasoline can lead to engine wear.

Oil plugging of the spark plug also causes the use of oil for 4-stroke engines and piston wear. If such a malfunction occurs, it is necessary to remove the gas tank cap and adjust the fuel supply. The air intake should be repaired. The clogged filter must be blown out with air, or it is better to replace it. How you can clean the filters is described in the instruction manual for the chainsaw.

It will be possible to determine the quality of the mixture using a spark plug insulator. If a brown color appears on it, this means that the quality of the mixture is normal. White color or soot indicates a poor or over-enriched composition of the mixture.

The candle is the cause of oiling. Interruptions in spark formation are observed when the gap is incorrectly set. In the instructions for the repair and operation of the device, the distance between the contacts of the spark plug is given. If you do not have such data, then you can set 0.7-1 mm.

If the gap is smaller, then the efficiency of ignition of the mixture decreases, if it is larger, then interruptions in the formation of a spark occur. To eliminate the over-enrichment of the mixture, the motor is purged. In this case, you need to remove the candle and turn the crankshaft several times with a manual starter.

When repairing a chainsaw, you will notice that no oil gets on the chain. If the chain is not lubricated, then there are interruptions in the lubrication system. There are such malfunctions:

The chain is dry, light in color.
The chain stretches too quickly.
The tire is too hot and the paint has melted on it.
Oil does not drain in the tank.
With a sharp chain, the saw has become worse to cut.

Such signs indicate that there has been a violation of the lubrication process. To check the oil supply to the lubrication unit, you need to remove the tire and turn on the chainsaw. Then increase the speed and observe the end point of the oil line. If the oil is running, it means that its volume is not enough for proper lubrication. If there is no supply, you need to clean the filter. You should also adjust the oil flow. In the absence of malfunctions, further diagnostics and do-it-yourself repairs are required. If it turns out that the substance is not being supplied, then the oil system is repaired.

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Consider the main malfunctions and methods for their elimination:

Broken oil hose. This can be seen on examination. In this case, the hose must be replaced.
If there is no thread on the shaft of the oil pump, then it should be replaced.
If there are defects in the thread, then it must be replaced.
If there is no main shaft corkscrew, then a nail of the same diameter can be installed in its place.
The filter might be clogged. This happens frequently with the Stihl MS 180. You can wash it off with gasoline. If this does not correct the problem, the filter should be replaced.

The Stihl 180 chainsaw often has a depressurization of the oil line.This occurs where the oil line from the tank is inserted into the tool body. A breakdown can be detected by oil leaks at the bottom of the saw.

To fix the problem, you need to remove the saw handle, pull out the hose. After that, you need to clean the hose. Then apply sealant to it and place it in the tool body.

If the chainsaw does not start, then the cause may be a breakdown of the ignition and engine start unit. If, when measuring the gap between the module and the flywheel, no deviations are found, then the spark plug should be checked. It is pulled out of the shaft and the gap is measured. If fuel enters the combustion chamber and there are no breakdowns in the ignition system, then the carburetor is faulty.

If the saw does not maintain idle speed, then the following may have happened:

clogged filter;
violation of the ignition system;
the carburetor has deteriorated;
parts of the motor are deformed.

For self-repair, you need to follow these steps:

Flush or replace fuel hose.
Clean the filter.
Check the quality of gasoline and oil.
Check the operation of the carburetor and spark plugs.

When the Stihl chainsaws are repaired, they will work correctly.

If the saw is not gaining momentum, then this could lead to:

faulty engine;
cylinder wear;
failure of piston rings;
breakage of the spark plug;
coil malfunction;
unbalanced carburetor screws.

If, after testing, no defects are found, then the carburetor is checked.

In order to repair the device, it must first be disassembled. You need to remove the side cover, saw chain and bar. Then clean the instrument, blow it out with a compressor and clean all the assemblies with a brush. Then remove the handle. To do this, remove the plugs from the shock absorbers using a screwdriver. After that, remove the shock absorbers and the handle.

Then the starter is removed. Remove the housing cover and unscrew the starter screws. The part is removed. Then remove the flywheel by unscrewing the nut that holds it, unscrew the flywheel nut. You need to twist to the left. Remove the flywheel. Then dismantle the clutch, oil pump drive and carburetor.

After that, the motor is removed and disassembled. It is held in place by 4 screws on the bottom of the saw. You need to unscrew them and remove the motor. Then the engine itself is disassembled. Unscrew the crankcase screws, remove it. Then dismantle the crankshaft, oil seals, bearings and piston rings. At the end of the disassembly, repairs and troubleshooting are performed.

After repair, the tool will need to be reassembled. To do this, install the piston on the connecting rod. The arrow on it should look along the chain, and to the left of the piston there will be the side of the crankshaft in which you want to mount the flywheel. They put the piston in the cylinder. Install the bearings, oil seals and circlip into the cylinder. After that, degrease the place of fixing the crankcase and install it in its place. When reassembling, follow the reverse sequence for dismantling.

Remove the drive sprocket before unscrewing the clutch. Remove the corkscrew washer and remove the sprocket and needle bearing. Unscrew the clutch. Remove the baffle plate and pump.

Chainsaw sprocket replacement is needed when:

jams the movement of the chain;
the drive sprocket has worn out.

To replace, you need to remove the chain saw sprocket. The sprocket teeth must not deviate from the required dimensions, otherwise the saw operation will be accompanied by vibration, which will lead to damage to the crankshaft and bearings. The lifespan of the sprocket is 2 times that of the chain. Use 2-3 chains until the cutting surface is abraded. After that, change the asterisk. It is located behind the clutch. Remove the clutch cover.

Remove the bar, chain, and clutch. But first you need to fix the crankshaft. Then the stripper is placed in the hole of the sleeve and turned clockwise. Remove the clutch. There is an asterisk behind it. Now it is being dismantled. If it is defective, it is replaced.

Consider how to change the oil pump. If the element leaks, then the gasket between the two parts should be renewed.If this part of the oil pump is not damaged, then it must be wiped and put back. Now they check the hose. There should be no cracks on it. If the hose is damaged, replace it. Then the outlet channels are cleaned with a compressor.

Let's consider how the diagnostics and replacement of the piston group is carried out. It is necessary to check the condition of the cylinder and the degree of wear of the piston. After dismantling the motor, unscrew the pallet, remove the crankshaft with the piston from the cylinder. Unscrew the piston pin stoppers. If the piston is defective, it must be replaced. Retaining rings are fixed with a cut down. Before installing the piston group in the cylinder, the piston is lubricated with oil. Before installing the crankcase, degrease its surface and apply a sealant.

It is necessary to set the ignition on the chainsaw. The ignition is adjusted as follows:

turn out the candle and evaluate its appearance;
specify the distance between the magnets and the coil (up to 0.2 mm);
check the spark.

The carburetor is adjusted on a warm engine. If the engine fails to tune, the carburetor stuck could be the cause of excess gasoline in the mixture. To remove the part, it is necessary to unscrew the fastening nuts, disconnect the ignition and the rod from the engine control lever. Then the lever is removed. Then you can remove the filter and carburetor.

The muffler is secured with two nuts. You need to untwist them and pull the muffler towards you. Then the screws of the coil are unscrewed and dismantled. At the Stihl saw, the carburetor has 1 idle speed adjustment screw. If the idle speed is violated, then the carburetor needs repair. This is a complex process and difficult to do on your own. Contact a repair shop.Remove the side cover. Inspect the inside of the protective casing. If there is no damage, check the launch unit. Unscrew the starter bolt and remove the spring. Diagnose a pulley with a cord. If the rope is intact, then each part of the launch mechanism is checked:The starter cord is made of synthetic material and will gradually wear out. If it is damaged, cracked or torn, it must be replaced. Image - Stihl ms 180 chainsaw DIY repair

The Stihl chainsaw, the MS 180 model, is primarily used for wood harvesting and various construction work. Such equipment is used very often due to the large list of functions and capabilities. The main feature of this model is the reduced vibration, which is very important. Naturally, during operation, the chainsaw may fail, which means that you will have to repair it.

A feature of the Stihl chainsaw carburetor is the presence of one screw, which is responsible for adjusting the idle speed. When using the equipment, you should always pay attention to idle speed... A few simple steps will help to adjust this: checking the air filter, as well as the spark protection grill.

It is worth noting that repairing the Stihl chainsaw carburetor is considered a laborious process. If for some reason it stopped starting, you must do the following:

open the gas tank cap and then close it;
remove and dry the candle;
ventilate the combustion chamber.

If these actions are unsuccessful, pay attention to the fuel supply air filter and the functioning of the spark plug. If, in your opinion, the problem was caused by a malfunction of the carburetor, then the chainsaw purchased with a guarantee should be returned to the service immediately. This is due to the fact that it is quite difficult to disassemble it yourself.

In case of various equipment breakdowns, it is always necessary pay attention to the spark plug... To do this, carefully connect the wires, and then turn the element out using the appropriate key. Then you need to assess the condition of the candle.

If it is dry, then this indicates that no fuel has entered the cylinder. Accordingly, the problem is not related to the candle.
In the event that such an element is splashed with fuel, it is worth making sure that the carburetor starts correctly. The same applies to adjustment.The candle itself is gently wiped, and then the gasoline supply is shut off and the starter is started. This will help get rid of excess fuel and ventilate the combustion chamber at the same time. After that, the candle is screwed into place and the mechanism is started again.
If black carbon is visible on this element, then, most likely, in the process of using the Stihl chainsaw, low-quality oil was used. Also, the cause may be an incorrect fuel to oil ratio or incorrect carburetor adjustment. In this situation, the candle is carefully washed, then the carbon deposits are removed with a sharp knife or needle and the electrodes are wiped. When checking the spark plug, it is important to make sure that the distance between the electrodes is no more than 0.5–0.65 mm.

As mentioned earlier, when viewed on a candle you can see black carbon deposits... In this case, experienced craftsmen recommend checking if a spark occurs. For this purpose, the ignition cable is fixed to the candle, after which the nut and the cylinder are connected by means of pliers. Then it remains to start the chainsaw starter. If the spark does not occur, the spark plug will have to be replaced. In a situation where the use of a new element is also ineffective, it is necessary to check the high-voltage wires and the connection with the candle.

During the operation of the Stihl chainsaw, some people complain that fuel stops flowing into the cylinder... This problem can occur for several reasons.

Dirty filter. In this case, it is necessary to remove the hose and pay attention to the fuel stream. The filter itself is carefully cleaned or replaced with a new one. As a preventive measure, it is recommended to replace this element every 3-4 months.
Clogged breather. Disconnecting the hose will help to make sure that this is the cause of the problem. If a blockage is found, use a needle or other small, sharp object.
Lack of fuel or insufficient amount of fuel. This is due to a clogged filter. Separately, it is worth mentioning an incorrectly adjusted chainsaw carburetor. To rectify the problem, it is recommended to carry out the adjustment again using the appropriate screw.

To ensure that fuel always flows into the cylinder, the fuel filter should be periodically cleaned and replaced. You should also make sure that the hose with the drive is tight, and membrane is not damaged.

It is worth noting that for the correct functioning of the Stihl chainsaw, it is necessary to choose high-quality fuel. Moreover, its quantity must correspond to the rate recommended by the manufacturer itself.

Chainsaw Calm MC 180 - pretty simple unit... Despite this, the repair of equipment often causes a lot of difficulties, because one malfunction can occur due to a large list of reasons. Accordingly, before you decide to proceed with the repair, accurately diagnose the breakdown.

Video (click to play).