In the review, we will consider what can be identified in such a unit as the Stihl 180 chainsaw, malfunctions, and repairs that can be done independently. She has proven herself in the market for the relevant products. This tool is popular among consumers. It is a portable device with a power of 1400 watts. The chain length is 350 mm, the engine size is 31 cm 3. At idle, the equipment makes 2000 revolutions per minute or more.
The popularity of this unit is also due to the reasonable price. But when using this tool, some problems may occur from time to time. After the warranty period has expired, you can repair it yourself, because the services of the service center specialists are quite expensive.
The main malfunctions of the Stihl 180 chainsaw
The Stihl 180 chainsaw, the malfunctions and repairs of which you can identify and make yourself, must be operated in accordance with the manufacturer's instructions. The start button, for example, should only be turned on after the mechanic has checked the chain tension, and also made sure that the appropriate tanks are filled with oil and fuel mixture. The chainsaw must be securely fixed in the hands, only after you can start working.
Leakage
But if you notice that oil is leaking for the chain, then the cause of the malfunction may be a leak in the junction of 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 must first be degreased and washed. Sometimes the oil filter fails, in some cases it becomes clogged. It can also leak oil. In this case, the filter is checked, cleaned or replaced with a new one.
Refusal to work
The Stihl 180 chainsaw, the malfunctions and repairs of which you can identify and carry out with your own hands, sometimes simply does not start. Such a problem can occur quite 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.
Candles are recommended to be removed and dried well. In some cases, this is enough for the tool to start up and start working properly. If the problem persists, then the reason is different. The breather affects the fuel supply. If it is clogged, a vacuum occurs in the fuel tank, which entails a refusal to work. The breather can be repaired very simply. To do this, it is cleaned with a needle.
If you purchased the Stihl 180 chainsaw, you can find and repair this tool yourself. Sometimes the equipment refuses to work for the reason that the cylinder fails. If there are bumps and chips on this node, then the reason is definitely in it. If you encounter a problem where the tool does not start, withstands power for a short time, or stalls after being turned on, then the muffler may be broken. During operation, it sometimes becomes clogged with deposits that occur during exhaust emissions.
The saw sometimes does not start well, 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, then it is fixed with a blowtorch. Sometimes the problem is oil leakage. In this case, the starter must be wiped with a rag.
Engine runs intermittently
You can start to identify malfunctions of the Stihl 180 chainsaw yourself if the warranty period has expired. Sometimes the engine runs intermittently, which can be caused by the 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 master should check the piston, it should not have chips, scratches and burrs. 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 be tightly fitted to the piston housing. If the piston inserted into the cylinder has free play when swinging, then this indicates 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 the Stihl 180 chainsaw, you yourself can detect and carry out malfunctions and repairs of the carburetor. If the tool stops starting, stalls and is unable to maintain power, and also does not hold idle speed, then the carburetor may be the cause of breakdowns. During operation, it quite often turns out to be clogged with dirt, dust or sawdust. You can fix the problem by cleaning it.
Malfunctions of the carburetor of the Stihl 180 chainsaw are solved after preparing some tools, among them:
- brush;
- head for 8;
- crosshead screwdriver;
- petrol.
The brush can be used to remove dust and dirt. Then remove the cover and filter. two nuts air filter are unscrewed, which will allow you to remove the air collector housing. You should now be able to see the carburetor. After lowering the damper down, it is necessary to remove the accelerator lever.
In order to move the carburetor from its place, it is necessary to remove the choke lever and close it. Now you should remove the wire to stop the engine and pull it towards you. The plastic lever is removed, the wire is fixed on it. The carburetor at this stage can be released and removed for cleaning. It is best to use a compressor for this, but if it is not available, flushing can also be done with pure gasoline.
Considering the main malfunctions of the Stihl 180 chainsaw, you should know that you should not forget about the fuel filter. Remove it and purge the fuel hose. Now you can put everything back together. 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 block the fuel supply. As a result, the candle is filled 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 assembly consisting of rings and many parts. This indicates that cleaning and repair must be carried out with special 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 twisted and dried.
Excess fuel can be drained through a special hole. Malfunctions of the Stihl 180 chainsaw and their elimination are described in part in the instructions. After reading the article, you will be able to understand that the candles should be dried for at least half an hour, after this time the candle can be installed 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 candle. If the master does not like the work of the candle, it is changed to a new one. Before repair, it must be remembered 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 the arsenal.
When your chainsaw does not start, although you are doing everything right, it is puzzling.
However, do not rush to carry it in for repair - the reason may not be so 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 a chainsaw is difficult to start on a hot one in the instructions.
If for some reason you don’t have it, then we will talk about the device’s device and possible problems in the first part.
If you are doing 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 Ural, Husqvarna, Shtil 180 and Partner.
Although they have their own characteristics, they are generally similar, so we will describe the possible causes of breakdowns and how to eliminate them in general for all tools.
Saw device - determine the location of the problem
All chainsaws are 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 why the chainsaw does not start or why it stalls.
Below you can see a photo of the Partner 350 chainsaw.
Most often, problems in chainsaws occur with the following elements: fuel, lubricants, air, spark.
During operation, these elements interact, and if one of them is broken, then this can 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, lubrication is obtained by adding gasoline, air enters a special air filter, and the quality of the spark depends on the ignition unit.
It is worth starting with the fact that all chainsaws start up 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. Often it says that when you turn on the chainsaw, it must be with the emergency stop brake engaged.
It is suggested that you do this 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 chance of you hurting yourself is minimal, even if you have little or no experience with this 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 tire with a chain (saw part).
When they say that the saw does not start, the following may also be meant: it starts, but immediately stops working, loses power or cut quality.
Most often, interruptions in the operation of the saw are in the operation of the engine, but it is not recommended to analyze it immediately - 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 method of preparation 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 of oil can be not only in improper preparation, but also in too long use - if it has been in your canister for months, it will certainly deteriorate, the same fate will await your chainsaw.
Another common problem is that the spark plug may be flooding while starting the tool.
Inspect the spark plug - if it is completely dry, then something is wrong in the system. Maybe fuel is not getting into the cylinder.
Also, upon examination, you can see black soot or too a large number of fuel - this all indicates improper adjustment of the carburetor.
If the saw starts, but immediately stalls, then the problem is most often in the fuel filter or carburetor jet - they are probably clogged and therefore do not work well.
To exclude a saloon from damaged objects, you need to disconnect the fuel hose attached to the carburetor and check if fuel is flowing from it.
When working correctly, gasoline should flow from the device in a stable and dense stream.
If the saw does not start hot, stalls after being turned on, or quickly loses power, then you need to inspect the muffler.
If the problem is in it, then it will be clogged with deposits left as a result of the exhaust, which is bad for the operation of the chainsaw.
A common cause of chainsaw failure is a small amount of chain lubrication. - This may be if the channels of the tool are clogged or the oil line is leaking.
It is also necessary to inspect the places where the pipes are connected 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 somewhere in the cylinder. This requires a simple visual inspection.
If during it you find that a chip or unevenness has formed on the device, then the problem has been found.
How to fix a chainsaw
Measures needed for recovery correct operation saws, no matter if 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, then the saw will have to be carried 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 it - you need to turn out and dry the candle, but do not pierce it, because. this will destroy the candle.
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 pouring, it may be that the candle has simply become unusable.
In this case, it is good to have a spare part (or rather a set) to replace this element and delete it from possible causes device breakdown.
In addition to the candle itself, the reason that the chainsaw is difficult to start hot or stalls may be a bad contact connecting the end of the candle and the high-voltage wire.
If everything is in order with this place, but there is still no spark, the ignition unit may have broken. You cannot fix it - you will have to replace it with a new one.
From time to time it is necessary to clean the air filters in chainsaws. If you have never done this before, then the reason for the breakage of the tool may be that it is clogged with dust.
If you have a Stihl 180, Partner 350 or Ural chainsaw, check the saloon first. A common cause of incorrect operation of these models is its clogging.
You can clean the saloon with a sewing needle - there is nothing complicated about it.
Another point that sometimes worries owners of Stihl 180 chainsaws is frequent idling after the first tanks of gasoline have been used up. However, according to experts, this is not a problem at all.
But if the phenomenon is still disturbing, then you can reduce the engine speed with the carburetor screw.
The video below shows how the Stihl chainsaw is repaired.
You can also clean the muffler on your own - this is not only a problem for Stihl 180 or Husqvarna 142 chainsaws. Domestic Friendship and Ural can also stall because of this problem.
The problem of poor performance of chainsaws often lies in the carburetor, but it may not work to fix it yourself, without experience in this matter.
Therefore, if you have not done this before, give your saw to specialists. Trying to save now, as a result, you can overpay many times more if you accidentally damage some important part.
If you have done all of the above, but the problem still persists and your chainsaw stalls or does not start, then the problem may lie in the cylinder group.
If chips and damage were found on the cylinder or piston assemblies, then these elements will have to be replaced or the cylinder must be bored 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 chain lubrication.
To remove 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 that your saw is equipped with have reached the end of their useful life. In this case, you will have to change them to new ones.
You can see the service life of the components in the instructions.
Stihl 180 is one of the most common chainsaw models, so let's talk about its problems in more detail.
The most common cause why the saw of the Calm 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.
It will have to be changed if it fails.
Replacing the spark plug is also a common solution to problems with the Model 180.
Look also at the condition of the pistons - perhaps they, as well as the cylinder and seals, need to be replaced.
In general, the Calm 180 model is quite durable and, most likely, if it does not start or stalls, then the problems in it are not too serious and you can fix them yourself.
The video below shows the repair of the 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 Partner 350 it is located in the same place as the candle).
The main advice in repairing a chainsaw with your own hands is not to do something that you do not know how, because. this can only make the situation worse.
If the chainsaw does not start, stalls or does not work well, then check first of all the simplest and most easily accessible elements: perhaps the oil is not properly selected, or it fills the candle, the filter is clogged or the pipes begin to leak.
All these problems are easy to fix with your own hands.
In case of serious breakdowns, if you do not have the necessary qualifications, it is better not to try to do repairs yourself and entrust the work to a specialist.
In any case, the elimination of a breakdown, even by proxy, will cost you less than a new model.
Do not forget to also check the instructions for the tool and replace all the parts responsible for its operation in time.
This will help you not to puzzle over why the tool stopped working and not waste time parsing and checking it.
If you still cannot do without repair, then before you start work, watch a video on how to disassemble and repair a chainsaw - it will help you.
1. "Running" STIHL chainsaws
It is categorically impossible to run in a new Stihl gas tool: after the so-called "running in", the Stihl chainsaw is usually carried to the service. For Stihl motors, idling is generally not desirable. The fact is that in 2-stroke engines at idle, incomplete combustion of the fuel mixture occurs and the engine cokes. 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 in at medium speeds. However, if the saw is "stuck" in the log - go 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 the 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 lack of service nearby). However, miracles do not happen and dirty fuel mixture eventually kills even ultra-reliable Stihl engines. And replacing the engine is usually half the cost of the saw. At the same time, other spare parts “stretch” behind the engine, which makes repairs unprofitable. Therefore, after each work, open the filter cover (it is very easy for Stihl) and check the filter. Most Stihl 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 not possible to clean - change! To do this, always have a reserve. The fuel filter works, as a rule, 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. Filled candle.
This is a "disease", as a rule, for novice users of gas tools. As you know, for the plant of 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 and burn out), vigorously pull the starter cord several times until the first "burr". After that, you can start the saw at high speeds with the throttle open. So, many beginners either miss the moment when the saw “grunts” for the first time or pulls sharply enough (then the saw does not “grunt” at all) and continue to turn the starter, while simultaneously supplying fuel not to the system, but to the combustion chamber. In this case, the fuel mixture fills the candle and the saw will no longer start. So this is the advice. Firstly, on a closed damper, you need to pull 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 filled a candle, then you can start the saw as follows. Unscrew the candle, wipe it with a dry clean cloth. Turn the saw upside down with the spark plug hole 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 at high speeds in the switch position - "half-open damper".
4. STIHL fuel oil
The fourth most common reason for a saw to be repaired is improper handling of fuel oil. A 2-stroke engine, as you know, requires the addition of engine oil to gasoline, which serves to lubricate rubbing parts, primarily the piston in the cylinder. Remember, only Calm has a proportion of engine oil of 20 g per 1 liter. All Chinese chainsaws have a proportion of 40-50g per 1 liter (here, by the way, is an easy way for you to determine the original from a 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 underfilling, 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 the ideal proportion, but a couple of percent in any direction will not lead to a sad result. For the preparation of the fuel mixture, a special liter canister, offered by Stihl. Look, it is really very convenient to prepare the mixture with its help.
STIHL chainsaws, by the way, do not have the concept of cylinder repair, the entire engine is being changed. Therefore, if the cylinder has already been worked out, replacing the piston with rings has no effect: in just a few hours of operation, perfectly round rings and a piston are developed to fit the worn cylinder oval. And that's it, goodbye compression. We are not talking about the use of non-branded oil at all, although there are still some desperate ones who, for the sake of penny savings on cheap oil, do not regret several thousand spent on a branded chainsaw. Some of them are even lucky - they get on the oil with similar properties like STIHL. But rare luck only confirms the rule - you need to use only branded oil.
5. Drive sprocket
Also a mystical spare part, which 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 have a groove in the form of grooves, very often the sprocket is used "to the last": until the teeth are developed 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 the furrow depth. Otherwise, a heavily worn sprocket will stretch the chain until it is completely impossible to stretch it. As a result, you will always buy new chains and throw them away after 2-3 sharpenings, i.e. practically new. Remember, when correct operation cutting headset chainsaws STIHL when two chains are completely worn out, one sprocket wears out, .
Every person who is familiar with a gas tool knows that sometimes the equipment works intermittently, or it can stall at one moment and not start again. There are a lot of 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 consider each reason in more detail.
Fuel and air filter
Contamination of the main filter elements of the chainsaw adversely 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 block the supply of gasoline to the carburetor and make it impossible for the engine to work.
Reduced compression
One of the frequent cases of difficult start-up of a chainsaw is the 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 the normal compression of the fuel mixture in the engine cylinder, it also affects the operation of the fuel pump.
During the operation of the tool, the value of the compression index drops, and the chainsaw starts to start poorly.
The reasons for the lack of compression, or its decrease, may be natural, because. the engine wears out during operation. Also, problems can be caused by a serious breakdown, for example, a CPG scuff, or a broken piston ring.
A sign of low compression is weak starter resistance at start-up. 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 completely by the CPG.
Carburetor adjustment
Incorrect adjustment of the carburetor will cause the chainsaw to not develop full power. It won't start well, or it won't start at all. Carburetor tuning directly affects the quality of the air-fuel mixture, which is necessary for the normal start and further operation of the engine.
If the carburetor is not adjusted correctly, 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 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 on its electrodes, and if this element fails, it will be difficult to start, or not possible at all.
The spark plug may fail completely, either intermittently or produce a weak spark. Checking the candle is quite simple, for this you need to unscrew it from the engine, attach it to the cap of the high-voltage wire and, putting it on the cylinder, pull the starter. If the candle is in order, the spark will be powerful with a bluish tinge. A weak spark with a reddish tinge is a sign of a problem. A defective spark plug must be replaced.
Ignition coil
Cause it won't start new chainsaw, or it starts poorly, the ignition coil may become. Modern chainsaws are equipped with electronic ignition coils. This part is not subject to repair, and, as a rule, if there is a defect, it is completely changed.
Gap between ignition coil and flywheel
An incorrectly set gap between the flywheel and the contacts of the ignition coil affects the quality of sparking, which in turn is responsible for the normal start-up and stable operation of the engine.
Chainsaw won't start hot
In cases where the chainsaw does not start hot, you need to conduct a visual inspection of all the main components of the chainsaw. Inspection should begin with a spark plug. Check the spark, inspect the surface of the spark plug electrode, these actions will help establish the direction in which to look for the problem.
Malfunctions in the ignition system
If, upon inspection of the candle, it is found that it is wet and sparking does not occur on the contacts, this means that the problem should be sought in the ignition system, inspect the coil, 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 candle, and the candle itself. Try replacing it with a new one.
Problems in the fuel system
If during the inspection it was found that there is a spark, and the candle is dry, then there are problems in the fuel system. Its check should begin 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 proceed with the removal of the carburetor only if a visual inspection did not allow determining the cause of the breakdown.
A characteristic symptom of a problem in the fuel system is an excess amount of fuel in the engine cylinder. As a rule, signs of this are 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 candle hole is directed to the bottom. If at the same time gasoline flows from the cylinder, then the reason that the chainsaw does not start is the overflow of fuel into the engine.
"Fills" with fuel, sometimes due to incorrect adjustment of the carburetor, or its malfunction.
The process of adjusting the carburetor can be found on the example of the Champion 254 saw by watching the video instruction.
Chainsaw does not start well when cold
Violation of the sequence of actions when starting on a cold
If a new chainsaw does not start on a cold one, then the reason may be in the wrong sequence of starting the engine. As a rule, each manufacturer in the instructions for the chainsaw indicates the procedure for starting the chainsaw on a cold one. Basically, it is similar for all two-stroke internal combustion engines that are installed on chainsaws, and is the following procedure.
Fuel problems
As with the difficult hot start option, problems in the fuel system can affect starting or not being able to start even when cold. Carburetor adjustment, fuel filter and line contamination are all reasons that cause difficulty starting.
Carry out diagnostics of the fuel system, this is the first thing you need in case of difficult cold start.
It is worth paying attention to the quality of the fuel, because. when using a mixture of gasoline and oil, which contains a small amount of water, starting may be significantly difficult or impossible.
The mixture must be used fresh enough, because. when storing gasoline diluted with oil for more than a month, its properties are lost and complicates starting, both on a cold and on a hot engine. For this reason, gasoline can burn poorly.
Engine malfunctions
CPG scoring, ring sticking, CPG wear, air leaks through seals and gaskets, compression reduction, all these problems can make starting a chainsaw impossible or significantly difficult. For example, if the CPG is not significantly worn, the compression in the engine decreases. In this case, starting on a “cold” one will be much more difficult, or the saw may stop starting, and on a “hot” one, the tool will start up well.
Accurately diagnosing problems in the engine associated with problems in its start is quite difficult, and it is better to contact a specialist in this field for this.
Chainsaw stalled and won't start
If the tool stalls and does not start, first you should check the presence of fuel in the tank. Strange as it may sound, but many people forget about it, and when a similar 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 gasoline in the tank, you need to evaluate how the saw worked up to this point. Maybe when working at the last moment there was an extraneous sound, rattle, ringing, there was a loss of power or the tool stopped abruptly. All this allows a preliminary assessment of the situation.
Engine jammed
Quite often there is a situation when the saw was working and abruptly stalled, the cause of which was the jamming of the engine, which in turn occurred as a result of a broken piston skirt, destruction of the crankshaft bearing, a snap ring of the piston pin or a break in the piston ring.
A seized engine can be easily identified by pulling the starter cord. In the case when the starter does not turn, most likely it is jammed, and further repairs are possible only at a service center.
Fuel line break
During operation of the chainsaw, vibration occurs, which can cause damage or a break in the fuel line of the chainsaw. In this case, the chainsaw will stall and it will be impossible to start. To diagnose a malfunction, you need to inspect and determine the presence of fuel smudges.
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 seize the engine. In the first cases of overheating, it is worth diagnosing the tool for the presence of foreign air leaks 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 wedging of the tool.
Video
The main reasons why the chainsaw does not start on the video. The video will be useful to those who quickly want to start a saw, the author gives good advice.
Outcome
If a situation arises when the chainsaw does not start, it is important to correctly diagnose, determine the direction in which to look for a malfunction. Do not use a tool that does not idle, as this indicates the presence of air leaks into the engine and can lead to serious problems. If experience in repairing chainsaws is not enough, it is better to contact a specialist who will save you time and nerves.
To work on your personal plot or a private house, farm or construction needs 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 required. A chainsaw is also indispensable for harvesting firewood, pruning green spaces, landscaping and running your own household.
Do-it-yourself chainsaw repair Stihl 180
Chainsaw Stihl MS 180 designed for inexperienced users to 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. As a rule, users have the following questions: Why is the chainsaw gaining momentum poorly? Why is the chain not lubricated?
Types of faults, diagnostics, repair tools
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.
Ignition system
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 mute.
Checking the ignition system 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 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.
Fuel system
Problems with fuel system chainsaws Calm 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 and adjustment idle move. 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.
Cylinder and piston group
If engine does not develop full power or does not start, then the problem may be insufficient pressure in the cylinder. This can happen due to wear of the cylinder, crankshaft bearings, and also due to piston rings falling due to piston wear, disassembly and assembly of the muffler is necessary. 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.
Chainsaw muffler
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.
Chain brake, clutch, lubrication system
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.
