Chainsaw stihl ms 180 DIY repair

In detail: chainsaw stihl ms 180 do-it-yourself repair from a real master for the site my.housecope.com.

Chainsaw "Calm 180" has proven itself in the construction market. This portable device has a power of 1400 watts, and a motor capacity of 31 cc. cm. The length of the saw chain is 350 mm, at idle 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, tool repair is not cheap, so those who understand at least a little about technical issues fix the breakdowns with their own hands.

The tool must be used in accordance with the instructions attached to it. Turn on start button should only be done after checking the chain tension, the presence of the fuel mixture and oil. Having fixed the chainsaw securely 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 equipment for repairing a chainsaw is suitable: various screwdrivers, socket and wrenches, hexagons.

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

To eliminate this problem, it will be necessary to 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 washing it.
Oil leakage may be due to the fact that the oil filter of the saw 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 cap on the gas tank. After that, you need to make combustion chamber ventilation, and also pull out 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 breather affects the fuel supply. Therefore, if it becomes clogged, then a vacuum forms in the fuel tank and the saw does not start. The breather is repaired very simply - it should be cleaned with a needle.
The Stihl 180 chainsaw may not work due to a broken cylinder. 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 being turned on, then the cause of the breakdown may be in the muffler. It may be clogged with any deposits that occur during operation in the exhaust process.
The saw may not start well due to a malfunction of the starter. To see it, remove the cover from the carburetor and twist the special screen 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 this failure may be cylinder-piston failure, which is quite simple 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, which should not have any scuffs, scratches, chips. If any are present, the piston will need to be replaced.

Optimum pressure in the combustion chamber is ensured by the piston and piston rings, which must fit tightly enough on the piston housing.If the piston inserted into the cylinder has free play during rocking, this indicates wear.

This defect can be corrected by cylinder bore and installation of repair parts. However, the easiest way is to simply replace the entire CPG kit.

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

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

any brush;
cross screwdriver;
head on 8;
some gasoline.

First of all, dirt and dust are cleaned with a brush. Then the cover and filter are removed. The two nuts of the air filter are unscrewed, and the air collector housing is removed. Now you can see the carburetor and draft "suction" and accelerator. By lowering the damper with your finger down, you will need to remove the accelerator lever.

To move the carburetor out of its seat, you must first remove the choke lever and close it completely. Now you need to remove and pull the wire to stop the engine. It is also necessary to remove the plastic lever 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, it can be pulled out and cleaned. This is best done 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 also needs to be removed and blown through the fuel hose. Everything is assembled in 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 was lost. Due to the absence of this spring, the needle does not block the fuel supply, so the candle is “filled” 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 is necessary to clean and repair it with special care and caution.

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 candle 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.

The cause of the malfunction may be a weak contact between the end of the candle and the high-voltage wire. If the candle does not work at all, then it is better to replace it with a new one.

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

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 the video instructions for fixing various breakdowns of the Stihl 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 popular. 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 Stihl 180 chainsaw has been the most popular among both amateurs and experienced foresters for many years, which is distinguished by simple maintenance, repair and operation. Stihl was founded more than 9 centuries ago and began manufacturing gasoline chain saws back in 1926. Thanks to many innovations, unpretentiousness and durability, the tools of this manufacturer are in demand in the global market for woodworking equipment.

Before starting work on diagnosing faults and troubleshooting, it is necessary to prepare the necessary tools.

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

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;
socket set with collar
Multitool Stihl.

Stihl multifunctional tool

In order to qualitatively eliminate emerging breakdowns and restore performance, 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. To protect the fingers, it is recommended to wear cotton gloves.

The most common malfunctions when repairing a Stihl 180 chainsaw include:

the engine does not start;
the operation of the motor intermittently, with a short operation, the chainsaw 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 a break in the chain links. You can independently restore its integrity by riveting links or replacing with a new one.

Despite the relative simplicity of the design and the absence of complex mechanisms, experts recommend troubleshooting in a certain order. First of all, the presence of the mixture in the fuel tank is checked, and if everything is in order with the liquid level, it is necessary to proceed to inspect the chainsaw launch unit. If this mechanism is in a normal state, you need to check the performance of the spark plug.

After the manipulations performed to diagnose the candle (determining the presence or absence of soot, the correct gap between the electrodes, the condition of the sealing ring), we transfer our attention to the carburetor. Due to fine sawdust, dust and soil particles, clogging of the fuel system often occurs.

If cleaning the carburetor of the stihl 180 chainsaw did not help restore the unit to its previous performance, the reason probably lies in the cylinder-piston group (CPG). The power unit is one of the most complex mechanism of the tool, the diagnostics 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 components of the fuel system chainsaw 180 calm

Even if the owner is sure that gasoline is available, this eliminates 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 chainsaw breather, a regular medium-sized sewing needle is used.

When inspecting the fuel system, you should pay attention to the integrity of the pipes, the tightness of which can be compromised by mechanical damage or long-term operation of the unit. Sometimes the cause of the leakage of the mixture and, as a result, not the correct operation of the engine, is the wear of the rubber gaskets and the primer (choke button). In this case, to repair the Stihl 180 chainsaw with your own hands, you need to purchase a repair kit for seals and replace them.

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

General view of the ignition chainsaw 180

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

Most manufacturers, including Stihl chainsaws, recommend setting a gap of 0.2 mm. To do this, you will need a coin-shaped, coin-wire, or flat probe, which can be purchased at any automotive store.

Chainsaw starter Stihl 180 assembly

Having dismantled the candle from the shaft, we measure the gap of the chainsaw candle between the central and side electrodes. With its excessive (more than 0.7-1.5 mm) spark may occur periodically, and with a minimum (less than 0.7 mm) - insufficient for optimal ignition of the fuel mixture.

If gasoline enters the combustion chamber, and a mismatch in the ignition system has not been identified, the carburetor may be the likely cause of the breakdown. This assembly 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 means.

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 Stihl 180 chainsaw and its restoration, we proceed to troubleshooting in the power unit, namely in the cylinder-piston group of the saw.

During operation, the parts of the cylinder-piston group of the saw fail due to friction forces, high temperatures and loads. If the tool does not develop full power at start-up and stalls at idle, a possible problem may be a breakdown of engine parts. To disassemble the power unit, unscrew 4 bolts and remove the cylinder. The owner is required to carefully inspect its internal working surface for the presence of chips, nicks and cracks.

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

Cylinder-piston chainsaw group Stihl MS180

When diagnosing internal combustion engines, we also perform a visual inspection of the piston and compression rings. Made of dural alloy and cast iron, respectively, they are subjected to abrasion loads to a greater extent, unlike a steel cylinder. In case of breakage and excessive wear of the piston rings, it is necessary to replace them.

If, during visual inspection, an ovality of the working surface of the cylinder is observed, it will require boring. To do this, we measure its diameter by a larger size, select the piston and perform subsequent machining.

In the process of sawing wood, the cutting part of the tool is subjected to high loads. In order to reduce friction forces and the subsequent wear of the chain, the Stihl chainsaw 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 nozzles. Image - DIY chainsaw stihl ms 180 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 nozzles cannot be repaired and must therefore be replaced. You can clean the oil channels with compressed air. For these purposes, we use a compressor or a conventional automobile hand pump.

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

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

Chainsaw Stihl MS 180 designed for inexperienced usersto make this tool as easy to use as possible. This chainsaw is easy 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, parts wear out, which leads to tool malfunctions. Some of the most common and typical faults can be fixed by hand at home.

For chainsaw troubleshooting you need to have the right 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 determine the causes of the malfunction and locate the crash site. Since the chainsaw has an internal combustion engine, it is logical to assume that the main malfunctions will be associated with this particular device. The most common malfunctions during the operation of the saw are:

malfunctions of the ignition system;

fuel system malfunctions;

malfunctions of the cylinder and piston group;

muffler malfunctions;

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

brake and clutch failures;

malfunctions of the chain lubrication system;

breakage of the starter cord;

drive sprocket wear.

Troubleshooting engine operation must begin with checking the level of gasoline in the fuel tank. If the fuel level is normal, we begin to check main chainsaw systems. Image - DIY chainsaw stihl ms 180 repair

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

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

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

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

Problems with the fuel system of the Stihl chainsaw 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. To repair, you need to remove the fuel hose from the carburetor and see how the fuel runs. If the trickle is weak, then you need to get the fuel filter through the fuel filling hole and clean it. If the filter is very dirty, it is recommended to replace it with a new one.

Another common problem is breather blockage. 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 enter in the required volume, fuel mixture is obtained too rich, which leads to unstable operation of the engine.To eliminate the malfunction, the filter must be removed, thoroughly rinsed and dried, and reinstalled.

If these methods did not solve the problem, then the problem may be in the incorrect adjustment of the carburetor. Carburetor adjustment should be carried out with clean air and fuel filters. On most carburetors, adjustment is made using three special screws: maximum speed, minimum speed and idle adjustment. Screw maximum speed denoted by the symbol H, it controls the main jet. Screw L is designed to adjust the minimum speed and controls the idle jet. Screw S finely adjusts the idle speed.

Sometimes found in carburetors two adjustment screws, which is done to simplify the setup. Accurate carburettor tuning data you need to take it from the instruction manual, but it is better to entrust this operation to specialists, since this is a very difficult and responsible job.

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

For a more accurate diagnosis, you can use a compression gauge, which is installed in the spark plug hole. Turning the starter, 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 still engine. To determine the complete picture of the state of the CPG, you need 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 Stihl 180 chainsaw, it is also recommended to watch videos of this work on the Internet. Assemble the engine in reverse order.

If the engine runs normally at idle, but stalls as the speed increases, it is likely that the muffler is the cause. The muffler can become clogged with fuel combustion products and block exhaust outlet and, as a result, the engine does not develop maximum speed. The reason may be excess oil in the 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 may also be chain brake failure. Most often, the space under the gearbox cover is clogged or the brake band wears out. In case of blockage, remove the cover and thoroughly clean the interior. Repair in case of wear of the brake band is to replace it.

Often, oil smudges are visually visible in the chain drive unit, which leads to incorrect operation of the stem. To fix the problem, you need to check the quality of the connection between 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 you need to clean the channels for supplying lubricant, which happens quite often.

If the chainsaw chain is spinning almost constantly, while the engine sometimes runs unstable, then the fault should be sought in the clutch. It may be a broken spring, or a piece from the clutch cam may also break off. You can fix the problem by replacing this node.

During the operation of the chainsaw, parts wear out unevenly. To maintain the performance of the device, it is necessary to timely replace worn parts, such as a chain, drive sprocket, tire and others. In this case, the Stihl 180 chainsaw will work flawlessly for a long time.

The Stihl chainsaw is a tool that is designed for harvesting wood, processing plants, creating landscape design and other household needs. If any parts break down or the device fails, 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 occur in the components and design of the device, and how the Stihl 180 chainsaw is repaired with your own hands.

If you notice that a candle is pouring on a 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 poor, then there is a decrease in power, the cylinder overheats and the saw systems wear out. A wet spark plug on a Stihl chainsaw is due to an imbalance in the fuel mixture. The lack of air in the mixture prevents proper combustion of the emulsion.

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

Clogging of the spark plug also causes the use of oil for 4-stroke engines, wear of the pistons. If such a malfunction occurs, it is necessary to remove the gas tank cap and adjust the fuel supply. The air intake must be in good condition. A clogged filter must be blown out with air, but it is better to replace it. How to clean the filters is described in the chainsaw operating instructions.

It will be possible to determine the quality of the mixture using a candle insulator. If a brown color appears on it, then 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 cause of oiling is a candle. Interruptions in the formation of a spark are observed when the gap is set incorrectly. In the instructions for the repair and operation of the device, the distance between the contacts of the candle 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 there are interruptions in the formation of a spark. To eliminate the over-enrichment of the mixture, purge the motor. In this case, it is necessary to remove the candle and turn the crankshaft several times with a manual starter.

When repairing a chainsaw, you may notice that oil does not get 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 shade.
The chain stretches too fast.
The tire is too hot and the paint has melted on it.
The tank does not lose oil.
With a sharp chain, the saw began to cut worse.

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

Consider the main malfunctions and methods for their elimination:

Oil hose break. This can be seen upon inspection. In this case, the hose must be replaced.
If there is no thread on the oil pump shaft, then it should be replaced.
If there are defects in the thread, then it must be replaced.
If the corkscrew of the main shaft is missing, then a nail of the same diameter can be installed in its place.
The filter may be clogged. With the Stihl MS 180 saw, this happens often. You can wash it 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 coming from the tank is inserted into the body of the tool. You can detect a breakdown by smudges of oil at the bottom of the saw.

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

If the chainsaw does not start, then the cause may be a breakdown of the ignition and engine start assembly. If no deviations are found when measuring the gap between the module and the flywheel, then the spark plug should be checked. It is pulled out of the mine 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 occurred:

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

For self-repair, you need to perform the following steps:

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

When Stihl chainsaws are repaired, they will work properly.

If the saw does not gain momentum, then this could lead to:

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

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

To repair the device, it must first be disassembled. You need to remove the side cover, saw chain and bar. Then clean the tool, blow it with a compressor and clean all the nodes with a brush. Then the handle is removed. To do this, remove the plugs from the shock absorbers with 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. Extract the detail. Then remove the flywheel by unscrewing the nut that holds it, unscrew the flywheel nut. You need to turn to the left. Take off the flywheel. Then the clutch, oil pump drive and carburetor are dismantled.

After that, the motor is removed and disassembled. It is held on by 4 screws on the bottom of the saw. You need to unscrew them and remove the motor. Then the engine is disassembled. Unscrew the crankcase screws, remove it. Then the crankshaft, oil seals, bearings and piston rings are dismantled. Upon completion of disassembly, repairs and troubleshooting are carried out.

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 will be the side of the crankshaft into which you want to mount the flywheel. Put the piston in the cylinder. Install the bearings, seals and circlip into the cylinder. After that, the place of fixation of the crankcase is degreased and installed in its place. When assembling, follow the reverse sequence of dismantling.

Before unscrewing the clutch, you need to remove the drive sprocket. Remove the lock washer and remove the sprocket and needle bearing. Unscrew the clutch. Remove the reflective plate and pump.

Replacing an asterisk on a chainsaw is needed in cases where:

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

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

Remove the bar, chain and clutch. But first you need to fix the crankshaft. Then the puller is placed in the hole of the coupling and rotated clockwise. Take off the clutch. Behind it is an asterisk. Now it is being dismantled. If it is defective, it is replaced.

Consider how to change the oil pump. If the element is leaking, then the gasket between the two parts should be updated.If this part of the oil pump is not damaged, then it must be wiped and put in place. Now check the hose. It should not have cracks. If the hose is damaged, replace it. Then the outlet channels are cleaned with a compressor.

Consider how the diagnosis 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, the pan is unscrewed, the crankshaft with the piston is removed from the cylinder. Loosen the piston pin locks. 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, lubricate the piston with oil. Before mounting the crankcase, its surface is degreased and a sealant is applied.

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

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

Carburetor adjustment is carried out on a warm engine. If the engine cannot be tuned, then the cause of excess gasoline in the mixture may be a stuck carburetor. To remove the part, unscrew the fastening nuts, disconnect the ignition and thrust from the engine control lever. Then remove the lever. You can then remove the filter and carburetor.

The muffler is fixed with two nuts. You need to unscrew them and pull the muffler towards you. Then unscrew the screws of the coil and dismantle it. At the Stihl saw, the carburetor has 1 idle adjustment screw. If the idle speed is disturbed, then the carburetor needs to be repaired. This is a complex process, it is difficult to do it yourself. You should contact the repair shop.Remove the side cover. Inspect the inside of the protective cover. If there is no damage, check the launch site. 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 wears out over time. If it is damaged, cracked or torn, it must be replaced. Image - DIY chainsaw stihl ms 180 repair

The Stihl chainsaw, namely the MS 180 model, is used primarily for harvesting wood and performing various construction work. Such equipment is used very often due to a large list of functions and capabilities. The main feature of this model is 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 responsible for setting the idle speed. When using the equipment, you should always pay attention to idling speed. A few simple steps will help to adjust this: check the air filter, as well as the spark guard.

It is worth noting that the repair of 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 such actions were unsuccessful, pay attention to the fuel supply air filter and the functioning of the candle. If, in your opinion, a malfunction of the carburetor caused the problem, then the chainsaw purchased with a guarantee is best to immediately hand over to the service. 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, the wires are carefully connected, and then the element is turned out using the appropriate key. Then you need to evaluate the condition of the candle.

If it is dry, then this indicates that fuel has not entered the cylinder. Accordingly, the problem is not related to the candle.
In the case when such an element is splashed with fuel, it is worth making sure that the carburetor starts correctly. The same applies to adjustments.The candle itself is gently wiped, and then the gas supply is shut off and the starter is started. This will help get rid of excess fuel and at the same time ventilate the combustion chamber. After that, the candle is screwed into place and the mechanism is started again.
If black soot is visible on this element, then, most likely, low-quality oil was used during the use of the Stihl chainsaw. Also, the cause may be the wrong ratio of fuel and oil or incorrect adjustment of the carburetor. In this situation, the candle is carefully washed, then carbon deposits are removed with a sharp knife or needle and the electrodes are wiped. In the process of checking the candle, 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 soot. In this case, experienced craftsmen recommend checking whether a spark occurs. For this purpose, the ignition cable is fixed on the candle, after which the nut and cylinder are connected with pliers. Then it remains to start the chainsaw starter. If no spark occurs, the spark plug will need to be replaced. In a situation where the use of a new element is also unsuccessful, it is necessary to check the high-voltage wires and the connection to the candle.

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

Filter dirty. In this case, it is necessary to remove the hose and pay attention to the fuel jet. The filter itself is carefully cleaned or replaced with a new one. For preventive purposes, it is recommended to replace this element every 3-4 months.
Breather clogged. To make sure that the cause of the malfunction is exactly this, disconnecting the hose will help. If a blockage is found, use a needle or other small sharp object.
Lack of fuel or its insufficient quantity. This is caused by a clogged filter. Separately, it is worth mentioning the incorrectly adjusted chainsaw carburetor. To eliminate the problem, it is recommended to perform the adjustment again using the appropriate screw.

To ensure that fuel always enters the cylinder, the fuel filter should be cleaned and changed periodically. You also need to make sure that the hose with the drive fits snugly, and the membrane is not damaged.

It is worth noting that for the proper functioning of the Stihl chainsaw, it is necessary to choose high-quality fuel. At the same time, its quantity must correspond to the norm recommended by the manufacturer.

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

Video (click to play).