In the review, we will consider what faults and repairs that can be carried out independently can be identified in such a unit as the Shtil 180 chainsaw. It has proven itself well in the market for relevant products. This tool is popular among consumers. It is a portable device with a power of 1400 W. The chain length is 350 mm, the engine capacity is 31 cm 3. At idle, the equipment makes 2000 revolutions per minute or more.
The popularity of this unit is also due to its reasonable price. But while using this tool, some problems may arise from time to time. After the warranty period expires, you can carry out repairs yourself, because the services of service center specialists are quite expensive.
The main malfunctions of the Shtil 180 chainsaw
The Shtil 180 chainsaw, the faults of which you can identify and repair yourself, must be operated in accordance with the manufacturer’s instructions. The start button, for example, should be turned on only after the technician checks the chain tension and also makes sure that the corresponding tanks are filled with oil and fuel mixture. The chainsaw must be securely fixed in your hands, only then can you begin work.
Violation of tightness
But if you notice that chain oil is leaking, then the cause of the malfunction may be a leak in the joints between the oil tank hose and the oil pump. In order to fix the problem, you will have to disassemble the tool. If the hose is damaged, it is recommended to replace it. Sometimes it is sealed with a special compound. The surface should first be degreased and washed. Sometimes the oil filter fails, in some cases it becomes clogged. In this case, oil may also leak. In this case, the filter is checked, cleaned or replaced with a new one.
Refusal to work
The Shtil 180 chainsaw, the faults of which you can identify and repair yourself, sometimes simply does not start. This problem can arise completely by accident. First of all, the consumer needs to open and close the gas tank cap again. Ventilation of the combustion chamber must be carried out in the next step.
It is recommended to remove the candles and dry them well. In some cases, this is enough for the tool to start and work properly. If the problem remains, then the reason is different. The breather affects the fuel supply. If it becomes clogged, a vacuum occurs in the fuel tank, which results in failure of operation. The breather can be repaired very simply. To do this, it is cleaned with a needle.
If you purchased a Shtil 180 chainsaw, you can find and repair this tool yourself. Sometimes equipment fails to work because the cylinder fails. If there are unevenness and chips on this unit, then this is definitely the reason. If you encounter a problem where the tool does not start, holds power for a short time, or stalls after turning on, then the muffler may be causing the problem. During operation, it sometimes becomes clogged with deposits that occur during exhaust.
The saw sometimes has difficulty starting, which is caused by starter malfunctions. In order to identify the problem, it is necessary to remove the cover and a special screen from the carburetor, which is located behind the tool drum. If the contact wire is disconnected from the starter, it is fixed with a blowtorch. Sometimes the problem is an oil leak. In this case, the starter must be wiped with a rag.
The engine runs intermittently
You can begin to identify malfunctions of the Shtil 180 chainsaw yourself if the warranty period has expired. Sometimes the engine runs intermittently, which can be caused by a failure of the cylinder piston group. You can repair it yourself. To remove the cylinder from the tank, it is necessary to unscrew the bolts on its head. The technician should check the piston; there should be no chips, scratches or burrs on it. If any can be found, then the piston must be replaced.
Piston rings and piston provide optimal pressure in the combustion chamber. The rings must fit tightly onto the piston body. If the piston inserted into the cylinder has free movement when rocking, then this indicates its wear. To fix the problem, it is necessary to bore the cylinder and install repair parts. But the easiest way would be to replace the CPG kit.
Carburetor malfunctions
If you purchased a Shtil 180 chainsaw, you can detect and carry out carburetor malfunctions and repairs yourself. If the tool stops starting, begins to stall and is unable to maintain power, and also does not hold idle speed, then the carburetor may be the cause of the breakdown. During operation, it quite often becomes clogged with dirt, dust or sawdust. The problem can be resolved by cleaning it.
Malfunctions of the carburetor of the Shtil 180 chainsaw can be resolved after preparing some tools, including:
- brush;
- head at 8;
- crosshead screwdriver;
- petrol.
A brush can be used to clean away dust and dirt. Then remove the cover and filter. Two nuts air filter unscrew, which will allow you to remove the air collector housing. You should now be able to see the carburetor. After lowering the throttle down, you need to remove the accelerator lever.
In order to move the carburetor, it is necessary to remove the choke lever and close it. Now you should remove the engine stop wire and pull it towards you. The plastic lever is removed and the wire is fixed to it. At this stage the carburetor can be released and removed for cleaning. It is best to use a compressor for this, but if one is not available, flushing can be done with pure gasoline.
When considering the main malfunctions of the Shtil 180 chainsaw, you should know that you should not forget about the fuel filter. It is removed and the fuel hose is blown out. Now you can put everything back together in reverse order. If, after assembling the carburetor, the tool still does not start well and the muffler produces smoke, then the spring under the needle lever has been lost. Due to its absence, the needle does not shut off the fuel supply. As a result, the spark plug is flooded with gasoline. To fix this problem, you need to find the spring and install it in place.
When repairing a carburetor, you must remember that it is a complex unit consisting of rings and many parts. This indicates that cleaning and repairs must be carried out with extreme care. If the tool stalls or does not start, then, in addition to the carburetor, it is necessary to check the spark plugs. If they are faulty, they are unscrewed and dried.
Excess fuel can be drained through a special hole. Malfunctions of the Shtil 180 chainsaw and their elimination are partially described in the instructions. After reading the article, you can understand that the candles should be dried for at least half an hour; after this time, the candle can be replaced in place by starting the unit.
Conclusion
Sometimes the cause of the malfunction is poor contact between the high-voltage wire and the end of the spark plug. If the craftsman does not like the work of the candle, it is replaced with a new one. Before repairing, you must remember that the tire, chain, and anti-vibration elements wear out much faster than other parts. Therefore, for smooth operation, it is necessary to keep the listed spare parts in your arsenal.
When your chainsaw doesn’t start, even though you’re doing everything right, it’s puzzling.
However, do not rush to take it for repairs - the reason may not be that serious and it is possible that you can completely cope with the alleged malfunction with your own hands.
You can find a solution to why the chainsaw is difficult to start when hot, in the instructions.
If for some reason you don’t have it, then we’ll talk about the structure of the device and possible problems in the first part.
If you do everything correctly, according to the instructions, but the chainsaw still does not start or stalls, then the second section will help you, where you will learn about the most common solutions to this problem.
The most popular and frequently used chainsaw models by Russian users are the Ural, Husqvarna, Shtil 180 and Partner.
Although they have their own characteristics, they are generally similar, so we will describe possible causes of breakdowns and ways to eliminate them in general for all tools.
Saw device - determine the location of the problem
All chainsaws are designed more or less the same. This applies to both foreign-made devices (Husqvarna 142, Makita, Shtil 180, Partner 350) and Russian (Ural, Druzhba).
Therefore, you can easily find the answer to your question of why the chainsaw won’t start or why it stalls.
Below you can see a photo of the Partner 350 chainsaw.
Most often, problems in chainsaws arise with the following elements: fuel, lubricants, air, spark.
During operation, these elements interact, and if one of them is broken, this may be the reason why the chainsaw does not start.
All these 4 elements are located in different areas of the car: the carburetor is responsible for the air-fuel mixture, lubricant is obtained by adding gasoline, the air enters a special air filter, and the quality of the spark depends on the ignition unit.
It’s worth starting with the fact that all chainsaws start differently - hot and cold. On this moment There are 2 most commonly used mechanisms that are responsible for this process.
First of all, let's look at the instructions. It often says that when you turn on the chainsaw, it must have the emergency stop brake engaged.
This is suggested to be done for safety, so that you do not injure yourself with the tool. However, starting the chainsaw in this position is much more difficult, so it is best not to lock the brake.
The likelihood that you will harm yourself is minimal, even if you have little or no experience with the tool.
According to the instructions, inside the chainsaw body there is a fuel tank and an engine, and on the outside there is a handle, a starter, a bar with a chain (saw part).
When they say that a saw won’t start, they may also mean the following: it starts, but immediately stops working, loses power or the quality of the cut.
Most often, interruptions in the operation of the saw are caused by the operation of the engine, but it is not recommended to disassemble it right away - it is better to start looking for the problem gradually, from the simplest.
So, first of all, pay attention to the fuel - if its composition and preparation method are not suitable, then even very reliable tools, like Husqvarna 142 or Ural, will not work.
The correct fuel mixture is prepared only from gasoline, mixing it with a special oil, the brand of which is always indicated in the instructions for the tool.
The problem with oil can be not only in improper preparation, but also in using it for too long - if it sits in your canister for months, it will certainly go bad, and the same fate will await your chainsaw.
Another common problem is that the spark plug may flood while starting the tool.
Inspect the spark plug - if it is completely dry, then something is wrong in the system. The fuel may not be getting into the cylinder.
Also, upon inspection, you can see carbon deposits that are black or too a large number of fuel - this all indicates incorrect carburetor adjustment.
If the saw starts but immediately stalls, the problem is most often in the fuel filter or carburetor jet - they are probably clogged and therefore do not work well.
To exclude the saloon from the damaged objects, you need to disconnect the fuel hose attached to the carburetor and check if fuel is leaking from it.
When operating properly, gasoline should flow from the device in a stable and dense stream.
If the saw does not start when hot, stalls after switching on, or quickly loses power, then you need to inspect the muffler.
If this is the problem, then it will be clogged with deposits left over from the exhaust, which will have a bad effect on the operation of the chainsaw.
A common cause of chainsaw breakdown is a small amount of chain lube. – This could be if the tool channels are clogged or the oil line is leaking.
It is also necessary to inspect the places where the tubes connect to the oil pump fittings - it is possible that they are leaking.
The material below describes the main malfunctions of the Druzhba chainsaw.
The most a difficult situation occurs if the breakdown is located somewhere in the cylinder. To do this, you need to carry out a routine visual inspection.
If during the test you discover that a chip or unevenness has formed on the device, then the problem has been found.
How to fix a chainsaw
Measures required for recovery proper operation saws, no matter whether you have a Ural or any other model, depend on the location of the problem.
Please note that not everything you can fix with your own hands - if the breakdown is serious, you will have to take the saw to a specialist.
If you have done the first step - checked and corrected the quality of the oil, but the device still does not work, then you can move on.
If the problem is in the candle, then it is also quite simple to solve - you need to unscrew and dry the candle, but do not pierce it, because... this will render the candle unusable.
Excess fuel that is inside should be drained through the hole. You need to dry the candle for at least half an hour, then insert it back and try to start the tool again.
In addition to filling, it may be that the candle has simply become unusable.
In this case, it’s a good idea to have a spare part (or better yet, a set) to replace this element and cross it out possible reasons device failure.
In addition to the spark plug itself, the reason why the chainsaw is difficult to start when hot or stalls may be poor contact connecting the end of the spark plug and the high-voltage wire.
If there is nothing wrong with this area, but there is still no spark, the ignition unit may be broken. It cannot be fixed - you will have to replace it with a new one.
From time to time you have to clean the air filters in chainsaws. If you have never done this before, then the reason for the tool failure may be that it is clogged with dust.
If you have a Shtil 180, Partner 350 or Ural chainsaw, check the saloon first. A common reason for the incorrect operation of these models is its clogging.
You can clean the saloon using a sewing needle - there is nothing complicated about it.
Another point that sometimes worries owners of Shtil 180 chainsaws is frequent idling after the first tanks of gasoline are used up. However, according to experts, this is not a problem at all.
But if the phenomenon still bothers you, then you can use the carburetor screw to reduce the engine speed.
The video below shows how a Shtil chainsaw is repaired.
You can also clean the muffler yourself - this is a problem not only for Shtil 180 or Husqvarna 142 chainsaws. Domestic Druzhba and Ural can also stall due to this problem.
The problem with poor performance of chainsaws often lies in the carburetor, but it may not be possible to repair it yourself without experience in this matter.
Therefore, if you have not done this before, take your saw to the specialists. Trying to save now, you may end up paying many times more if you accidentally damage some important part.
If you have done all of the above and the problem is still not resolved and your chainsaw stalls or does not start, then the problem may lie in the cylinder group.
If chips and damage are found on the cylinder or piston assemblies, then these elements will have to be replaced or the cylinder will have to be bored out for a new piston of a suitable size.
If you inspect the chainsaw tubes and see that they are leaking, this means that the problem with your chainsaw is insufficient lubrication of the chain.
To fix this problem, you need to replace the tubes and carefully seal the places where they connect with sealant.
It may also be that the parts with which your saw is equipped have expired. In this case, you will have to replace them with new ones.
You can see the service life of the components in the instructions.
Shtil 180 is one of the most common models of chainsaws, so let’s talk about its problems in more detail.
The most common reason, why the saw of the Shtil 180 model does not start or stalls - the carburetor is clogged. In this case, it will have to be cleaned. The second most common problem is a clogged fuel filter.
If it malfunctions, it will have to be replaced.
Replacing the spark plug is also a common solution to problems with the 180.
Also look at the condition of the pistons - perhaps they, as well as the cylinder and seals, need to be replaced.
In general, the Shtil 180 model is quite durable and, most likely, if it does not start or stalls, then the problems with it are not too serious and you can fix them yourself.
The video below shows the repair of a Ural chainsaw carburetor.
Almost the same can be advised regarding the Partner 350 and Husqvarna 142, Ural, Makita models.
First of all, check the air filter - it could be clogged with sawdust and other debris. Then inspect the carburetor (in the Partner 350 it is located in the same place as the spark plug).
The main advice in repairing a chainsaw with your own hands is not to do what you don’t know how to do, because... this can only make the situation worse.
If the chainsaw does not start, stalls or does not work well, then first check the simplest and most easily accessible elements: perhaps the oil was chosen incorrectly, or it is flooding the spark plug, the filter is clogged, or the pipes have begun to leak.
All these problems can be easily fixed with your own hands.
In case of serious damage, if you do not have the necessary qualifications, it is better not to try to repair it yourself and entrust the work to a specialist.
In any case, fixing the breakdown, even with someone else’s hands, will cost you less than a new model.
Don’t forget to also check the instructions for the tool and promptly replace all the parts responsible for its operation.
This will help you not to rack your brains over why the tool stopped working and not waste time disassembling and checking it.
If you still cannot do without repairs, then before starting work, watch a video on how to disassemble and repair a chainsaw - it will help you.
1. "Running in" the STIHL chainsaw
It is strictly forbidden to break in a new Shtil gas tool: after the so-called “break-in”, the Shtil chainsaw is usually taken for service. For Stihl engines, idling is generally not advisable. The fact is that in 2-stroke engines, at idle, the fuel mixture is not completely burned and the engine becomes coked. The advice is simple - give the chainsaw gas all the time, t STIHL machinery loves to work! The only limitation for new chainsaws is that for the first 2-3 tanks, do not give full throttle, let all the parts of the saw grind at medium speeds. However, if the saw is “stuck” in a log, use full throttle, this is normal.
2. Air and fuel filter
It’s just some kind of mysticism, but very often even experienced motorists for some reason forget that a chainsaw has a standard 2-stroke internal combustion engine that needs fresh air and fuel. Surprisingly, many users do not change air and fuel filters for years! And only thanks to the unique design of STIHL engines, they work for a long time on a dirty fuel mixture (which is very important in forest conditions and the lack of service nearby). However, miracles don’t happen and it’s dirty fuel mixture Over time, it kills even the ultra-reliable Shtil engines. And replacing the engine is usually half the cost of the saw. At the same time, other spare parts follow the engine, which makes repairs unprofitable. Therefore, after each work, open the filter cover (at Shtil it is very simple) and check the filter. Most Shtil filters can and should be washed. Pay special attention to inner part filter that goes into the bypass air manifold: everything should definitely be clean there. If It is not possible to clean it - change it! To do this, always have a reserve. The fuel filter usually lasts much longer. But don't forget to check it too. If the saw does not start, the fuel filter may be clogged with dirt from low-quality fuel.
3. Flooded candle.
This is a “disease”, as a rule, for novice users of power tools. As you know, to start a cold chainsaw it is necessary to pump fuel into the system. To do this, the user must, with the throttle valve closed (so that the mixture does not ignite or burn), vigorously pull the starter cord several times until the first “grumble” occurs. After this, you can start the saw at high speeds with the throttle open. So, many beginners either miss the moment when the saw “grumbled” for the first time or do not jerk sharply enough (then the saw doesn’t “grumble” at all) and continue to turn the starter, at the same time feeding fuel not into the system, but into the combustion chamber. In this case, the fuel mixture floods the spark plug and the saw will no longer start. So this is the advice. Firstly, with the damper closed, you need to pull it about five to seven times, a maximum of ten, and even if you don’t hear the first “burk”, open the damper and try to start the saw (switch position “half-open damper - high speed”). Secondly, the sharper you pull, the faster you will start the engine.
If you have filled the spark plug, you can start the saw as follows. Unscrew the spark plug and wipe it with a dry, clean cloth. Turn the saw over with the spark plug hole facing down and turn the starter several times until all the fuel is squeezed out of the combustion chamber. Screw the dry spark plug back in and try to start it at high speeds in the “half-open” position of the switch.
4. STIHL fuel oil
The fourth most common reason for saws to be repaired is improper handling of fuel oil. A 2-stroke engine, as you know, requires the addition of motor oil to gasoline, which serves to lubricate the rubbing parts, primarily the piston in the cylinder. Remember, only Stihl has a motor oil proportion of 20 g per 1 liter. All Chinese chainsaws have a proportion of 40-50g per 1 liter (by the way, here’s a simple way to determine the original from the fake: just ask the seller about the proportion of oil in the fuel mixture). When oil is overfilled, it does not burn out, which is deposited on the walls of the piston, and when it is underfilled, the friction between the piston and cylinder increases. Those. In both cases, premature wear of the cylinder and piston occurs. Of course, you need to strive for an ideal proportion, but a couple of percent in any direction will not lead to a sad result. To prepare the fuel mixture, a special liter canister, offered by Shtil. Look, preparing the mixture with its help is really very convenient.
STIHL chainsaws, by the way, do not have the concept of cylinder repair; the entire engine is replaced. Therefore, if the cylinder is already worn out, replacing the piston with rings has no effect: in just a few hours of work, perfectly round rings and the piston are worn out to fit the worn oval of the cylinder. And that's it, goodbye compression. There is no talk at all about using non-branded oil, although there are still some desperate people who, in order to save a penny on cheap oil, do not regret spending several thousand on a branded chainsaw. Some of them are even lucky - they end up in oil with similar properties, like STIHL. But rare successes only confirm the rule - you need to use only branded oil.
5. Drive sprocket
Also a mystical spare part that most users for some reason forget to change. And although when changing the chain it is very clearly visible that the teeth of the sprocket are worn out in the form of grooves, very often the sprocket is used “until the last”: until the teeth are worn out so that the chain no longer clings. It is not difficult to remember that the wear rate is no more than 0.5 mm of furrow depth. Otherwise, a heavily worn sprocket will stretch the chain until it is completely impossible to tension it. As a result, you will constantly buy new chains and throw them away after 2-3 sharpenings, i.e. practically new. Remember when correct operation cutting set of STIHL chainsaws, when two chains are completely worn out, one sprocket wears out, .
Every person who is familiar with gas-powered tools knows that sometimes the equipment works intermittently, or may stall at one point and not start again. There are many reasons why a chainsaw does not start; we will try to consider the most common of them.
Main reasons:
- fuel and air filters;
- reduced compression;
- spark plug;
- ignition coil;
- gap between the ignition coil and the flywheel;
Let's look at each reason in more detail.
Fuel and air filter
Contamination of the main filter elements of a chainsaw negatively affects its operation.
For example, a dirty air filter will not provide enough air to the carburetor, which will affect the quality of the air-fuel mixture and normal engine starting. A dirty fuel filter will make it difficult or even cut off the flow of gasoline to the carburetor and make it impossible for the engine to operate.
Reduced compression
One of the common cases of difficult starting of a chainsaw is wear of the CPG (cylinder-piston group).
As you know, for a chainsaw to start normally, compression must be present in its engine. It is necessary for normal compression of the fuel mixture in the engine cylinder, and it also affects the operation of the fuel pump.
During the operation of the tool, the compression value drops and the chainsaw begins to have difficulty starting.
The reasons for the lack of compression or its decrease may be natural, because The engine wears out during operation. Problems can also be caused by a serious breakdown, for example, a scuffed CPG, or a broken piston ring.
A sign of low compression is weak starter resistance when starting. With reduced compression, a decrease in the power of the chainsaw is observed, which negatively affects its performance. The problem is eliminated by replacing the piston rings, or the entire CPG.
Carburetor adjustment
Incorrect carburetor adjustment will cause the chainsaw to not develop full power. It will be difficult to start, or not start at all. Carburetor settings directly affect the quality of the air-fuel mixture, which is necessary for normal starting and further operation of the engine.
If the carburetor is incorrectly adjusted, there will be more or less gasoline in the fuel-air mixture than required, and the mixture will not ignite even with normal sparking.
Excess gasoline in the mixture is usually called overflow. A characteristic sign of overflow is a wet spark plug, after several unsuccessful attempts to start the chainsaw.
Spark plug
The spark plug is one of the main elements of the ignition system. A spark is formed at its electrodes, and if this element fails, starting will be difficult or not possible at all.
The spark plug may fail completely, or work intermittently or produce a weak spark. Checking the spark plug is quite simple; to do this, you need to unscrew it from the engine, attach it to the cap of the high-voltage wire and, placing it on the cylinder, pull the starter. If the spark plug is in order, the spark will be powerful with a bluish tint. A weak spark with a reddish tint is a sign of a problem. A defective spark plug needs to be replaced.
Ignition coil
The reason it won't start new chainsaw, or it starts poorly, the ignition coil may be damaged. Modern chainsaws are equipped with electronic ignition coils. This part cannot be repaired, and, as a rule, if there is a defect, it is completely replaced.
Gap between ignition coil and flywheel
An incorrectly set gap between the flywheel and the ignition coil contacts affects the quality of spark formation, which in turn is responsible for normal starting and stable operation of the engine.
Chainsaw won't start when hot
In cases where the chainsaw does not start when hot, you need to conduct a visual inspection of all the main components of the chainsaw. The inspection should start with the spark plug. Check the spark, inspect the surface of the spark plug electrode, these actions will help determine the direction in which to look for the problem.
Malfunctions in the ignition system
If, upon inspection of the spark plug, it is found that it is wet and sparking does not occur at the contacts, this means that the problem should be looked for in the ignition system, inspect the coil, and check the gap between the flywheel and the coil contacts. You can also check how tightly the cap of the high-voltage wire sits on the spark plug, and the spark plug itself. Try replacing it with a new one.
Problems in the fuel system
If upon inspection it is discovered that there is a spark, but the spark plug is dry, then there is a problem in the fuel system. Checking it should start with the fuel filter. Next, you need to inspect the fuel hose and its attachment to the carburetor, pay attention to fuel leaks from the carburetor and the presence of gasoline in the air filter housing. It is advisable to start removing the carburetor only if a visual inspection does not allow you to determine the cause of the breakdown.
A characteristic sign of a problem in the fuel system is an excessive amount of fuel in the engine cylinder. Typically, signs of this include an excessively wet spark plug and the presence of a spark at the plug contacts. In this situation, it is necessary to turn the chainsaw over so that the spark plug hole is directed towards the bottom. If gasoline flows from the cylinder, then the reason that the chainsaw does not start is fuel overflow into the engine.
It “fills” with fuel, sometimes due to incorrect carburetor adjustment or malfunction.
You can familiarize yourself with the process of adjusting the carburetor using the example of the Champion 254 saw by watching the video instructions.
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.
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. For this reason, gasoline may burn poorly.
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 starting, but when “hot,” 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.
The chainsaw has stalled and will not start
If the tool stalls and does not start, you should first check the presence of fuel in the tank. Strange as it may sound, many people forget about this and when such a situation arises, they immediately try to repair the instrument, which can lead to serious damage.
In a situation where the saw has stalled and there is still gas in the tank, you need to evaluate how the saw worked up to that point. Maybe during work at the last moment an extraneous sound appeared, a grinding sound, a ringing sound, a loss of power occurred, or the tool suddenly stopped. All this allows us to preliminary assess the situation.
Engine jammed
Quite often there is a situation where the saw was working and suddenly stalled, the cause of which was engine jamming, which in turn occurred as a result of a broken piston skirt, destruction of the crankshaft bearing, a flyout of the corkscrew ring of the piston pin, or a break in the piston ring.
A seized engine can be easily determined by pulling the starter cord. If the starter does not turn, it is most likely jammed, and further repairs are only possible at a service center.
Broken fuel wire
When the chainsaw operates, vibration occurs, which can cause damage or breakage of the chainsaw's fuel line. In this case, the chainsaw will stall and it will be impossible to start. To diagnose a malfunction, you need to conduct an inspection and determine the presence of fuel leaks.
Overheat
Overheating of the engine during operation can cause the saw to stall and not start. Overheating is quite dangerous, as it can cause the piston in the cylinder to melt and jam the engine. At the first cases of overheating, it is worth diagnosing the tool for the presence of foreign air leaking into the engine and adjusting the carburetor.
Air leaks, as well as incorrect carburetor adjustment, affect maximum amount engine speed and its lubrication, which in turn causes overheating and jamming of the tool.
Video
The main reasons why the chainsaw does not start in the video. The video will be useful for those who quickly want to start a saw; the author gives practical advice.
Bottom line
If a situation arises when the chainsaw does not start, it is important to correctly diagnose it and determine the direction in which to look for the fault. You should not use a tool that does not idle, as this indicates that there is air leaking into the engine and can lead to serious problems. If you don’t have enough experience in repairing chainsaws, it’s better to contact a specialist who will save your time and nerves.
To work on your own personal plot or a private home, farm or construction requires such universal tool like a chainsaw. Wood has always been, is and will be relevant building material, for the processing of which such a unique device is necessary. A chainsaw is also indispensable when collecting firewood, trimming green spaces, landscaping and running your own household.
DIY chainsaw repair Shtil 180
Chainsaw Shtil MS 180 designed for inexperienced users to make the operation of this tool as easy as possible. This chainsaw is lightweight and easy 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 with your own hands at home. As a rule, users have the following questions: Why does the chainsaw have trouble picking up speed? Why isn't the chain lubricated?
Types of faults, diagnostics, tools for repairs
For Chainsaw troubleshooting 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 you begin troubleshooting a chainsaw, you need to accurately determine the causes of the malfunction and localize the location of the breakdown. Since the chainsaw has an internal combustion engine, it is logical to assume that the main malfunctions will be associated with this device. The most common malfunctions encountered during saw operation are:
- ignition system malfunctions;
- fuel system malfunctions;
- malfunctions of the cylinder and piston group;
- muffler malfunction;
Malfunctions not related to engine operation are also common. These include the following malfunctions:
- brake and clutch malfunctions;
- malfunction of the chain lubrication system;
- broken starter cord;
- drive sprocket wear.
Troubleshooting Engine operation must begin by checking the gasoline level in the fuel tank. If the fuel level is normal, we start checking basic chainsaw systems.
Ignition system
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 You should start by inspecting the spark plug. The verification scheme is simple. 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 the spark plug can be removed with a sharp awl; the electrodes should be cleaned with fine sandpaper.
Startup problems can also occur due to damage to the sealing gasket of the spark plug or its wear. Next, check the spark plug for a spark. To do this, you need to connect a high-voltage wire to it and, holding the spark plug with pliers with insulated handles, attach it to the cylinder with its thread. By pulling the starter cord, check for the presence of a spark. If there is no spark, then the spark plug should be replaced. If there is no spark on the new spark plug, then the problem should be looked for in the high-voltage wire.
Fuel system
Problems with fuel system chainsaws Shtil can sometimes be determined by their condition spark plug. So, if the spark plug remains dry during inspection, 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 flows. If the stream is weak, then you need to 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 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 fuel mixture may be due to a clogged air filter; in this case, 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 washed and dried, and reinstalled.
If these methods do not help resolve the problem, then the problem may be due to improper carburetor adjustment. Carburetor adjustments should be made with clean air and fuel filters. On most carburetors, adjustment is made using three special screws: maximum speed, minimum and adjustment idle move. Maximum speed screw designated 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 setup. Accurate carburetor setting data should be taken from the instruction manual, but it is better to entrust this operation to specialists, since this is a very complex and responsible job.
Cylinder and piston group
If the engine does not develop full power or does not start, the problem may be insufficient pressure in the cylinder. This can happen due to wear of the cylinder, crankshaft bearings, and also due to the piston rings sinking due to piston wear. Disassembly and reassembly of the muffler is required. If you remove the muffler in a calm weather, you can visually assess the condition of the cylinder and piston group by looking into the hole from the muffler. The overview will be small, but you can get an idea of the condition of the cylinder and piston.
For more accurate diagnostics, you can use a compression gauge, which is installed in the spark plug hole. Having turned the starter over, 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 full picture of the condition of the CPG, you need to completely disassemble the engine, 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. Reassemble the engine in reverse order.
Chainsaw muffler
If the engine runs fine at idle, but stalls when the speed increases, there is a possibility that the muffler is the cause. The muffler may 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 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.
Chain brake, clutch, lubrication system
The reason for the failure of the calm 180 may also be faulty chain brake. Most often, the space under the gearbox cover becomes clogged or the brake band wears out. If clogged, remove the cover and thoroughly clean the interior. Repair in case of wear of the brake band consists of replacing it.
Oil leaks in the chain drive unit are often visually visible, which leads to incorrect operation of the servo. To fix the problem, you need to check the quality of the connection between the oil pump fitting and the tube, and inspect them for cracks. If cracks are found, parts must be replaced or sealed with sealant. If there is not enough oil supplied to the chain, then you need to clean the channels for supplying lubricant, which happens quite often.
If the chain of a chainsaw spins almost constantly, and the engine sometimes runs unstable, then the fault should be looked for in the clutch. This could be a broken spring, or a piece of the clutch cam could break off. The problem can be resolved by replacing this unit.
During operation of a chainsaw, parts wear unevenly. To maintain the functionality of the device, it is necessary to promptly replace worn parts, such as a chain, drive sprocket, tire and others. In this case, the Shtil 180 chainsaw will work flawlessly for a long time.
