STIHL chain saw chain won’t turn

Husqvarna Chainsaw Chain Does Not Spin

for chain saws are dropping and it makes them more popular and accessible not only for experts, but also for ordinary, so to say, amateurs. But a common addiction. the lower the cost, the less reliable the machine, and more often malfunctions occur. When rotating the chain at idle speed, you must turn the t screw counterclockwise until the chain stops.accurate carburetor adjustment can only be made in the. But for chain saws at least what price Spectra, most of the defects are realistic to avoid with proper use, care and timely maintenance equipment. The chain rotates at idle Good afternoon to all! Yesterday, when working, I noticed that at idle the chain starts to turn slowly, stops, then again, and then the chain starts to turn. But no one is safe from chain saw breakage, as well as any other equipment. Therefore it is suggested to consider the main types of chain saw faults, ways to diagnose, fix and repair them.

All the major faults of chain saws can be divided into two main categories:. faults in the engine and its various components: the fuel preparation and feeding system, ignition, piston group with crankshaft, exhaust system. failures and breakdowns of other nodes: lubrication system, clutch, chain brake, bus and others.

Chainsaw engine malfunctions

Here are the various chain saw engine malfunctions that occur most often. The main such faults can be reduced to the following signs:

The engine does not start (rather generalized and the reasons may be quite different);

does not develop power, t.е. works fine at idle, but stalls or stalls under load.

Problems with starting the engine

It is very important to correctly determine the cause of malfunction, because otherwise we won’t be able to fix it. If there is no unusual noise when you try to start the chainsaw (knocking, squealing, etc.д. ) very often it turns out that the breakage is not really there. For example, if you do not start the chainsaw correctly and pull on the nozzle for a long time, the engine just floods and it is very hard to start it.

In order to properly start a cold chainsaw engine, set the lever or switch to the choke closed position. Then you need to pump the mixture into the carburetor if you have a fuel priming pump. Pull the starter grip until the resistance of the engine becomes palpable and yank vigorously in the amplitude of moving your hand to the side. After two. three such motions the engine should first start and then stall. If it does not, you should move the lever to the half throttle position or just to the work position and keep running the chain saw in this mode. Many chain saws “half throttle” is fixed automatically when you pull the choke. Some models have an ignition key switch, it’s important to make sure it’s turned on.

If the engine won’t start, the first thing to do is to unscrew and inspect the spark plug. There are cases, when starting in cold weather, fill the combustion chamber with fuel. Then it is also necessary to unscrew the spark plug, dry the combustion chamber by idling, clean the spark plug, unscrew it and repeat the start. It’s a good idea to check for sparking right away. put a cap on the unscrewed spark plug with a high voltage wire, put it on the cylinder and yank the starter. The chain rotates when the chain saw is idling, but at rpm. Visually inspect for a steady blue spark. OK. Screw the spark plug back in and start the engine. If there is no spark, change the spark plug and try again. Not again. check the connection of the high-voltage wire to the spark plug, the coil and the ignition system.

READ How to Adjust the Carburetor on a Husqvarna 240

Generally speaking, the condition of the spark plug is a good indicator of the type of fault.

stihl, chain, turn
  • Dry. Most likely, the fuel mixture is not getting into the cylinder. It’s not the ignition system, so screw the spark plug back on and check the fuel system.
  • Wet, heavily spattered with fuel. The reason for the excessive fuel mixture lies either in violation of the rules of starting, as described above, or in improper adjustment of the carburetor.
  • The gasket is covered with black soot. This could be an indication that poor-quality oil has been used, that the carburetor is not properly adjusted, or that the gasoline to oil ratio is incorrect. The spark plug should be washed and cleaned of deposits with a sharp object (awl or needle), the electrodes should be swabbed and refitted.

When checking the spark plug, pay attention to the gap between the electrodes: 0.5 to 0.65 mm is normal. A damaged or worn gasket needs to be replaced.

stihl, chain, turn

Checking and adjusting your chainsaw carburetor

A properly adjusted chainsaw carburetor allows the chainsaw to operate efficiently at full power with the most economical fuel consumption.

You don’t often need to adjust your chainsaw carburetor, because the adjustment is done at the factory to get the optimum performance. The adjusting screws, on the other hand, are designed to adjust the carburetor of the chainsaw more accurately, if necessary.

When and why is it necessary to?

Among the causes of misalignment of the adjusting screws, the most common are the following:

  • Strong vibration or damage to the protective cap. This seldom happens, but it does happen.
  • Severe engine (piston) wear. STIHL STIHL 180 chain saw at high rpm stops or stalls at idle speed. Of course, in this case you should take more care about repairing the chainsaw engine, but still adjusting the carburetor can improve its functionality for a while.
  • Clogging in the carburetor because of a damaged air filter, poor quality gasoline or because of scale formation. 3.1 why the chainsaw is sawing crooked that the chain spins if the idle speed doesn’t. In this case, in addition to the adjustment of the carburetor, you can not avoid flushing it.

Idle speed regulation screw on chain saw

and where the idle speed screw is located JOIN VSP GROUP PARTNER PROGRAM:.

Chainsaw clutch burned out. Burned clutch chainsaw.

, and assured me that it had been stuck from the beginning and immediately, assumed that the oil.

Engine stalls

The engine starts but stops when idling or under load. In this case, in most cases you should perform the same actions as described above.

How to adjust the chainsaw, is depending on when exactly the problems begin:

Shooting into the carburetor:

  • Very late ignition fuel-air mixture does not have time to burn through the cylinder, so comes out a sound similar to a small explosion.
  • Depleted fuel-air mixture. In the mixture is not enough gasoline requires adjustment of the chain saw, or more precisely jitters to increase the flow of fuel. Why the chainsaw throttles itself for the same reason.

What could be a problem?

All problems can be divided into two large groups:

Engine failure is characterized by the following:

  • equipment does not start, stalls;
  • does not pump fuel to the primer;
  • Unstable operation, fluctuating revolutions;
  • Idle, may float, stall, or shoot when under load.

If the problem is in other assemblies, such phenomena are noted:

The chain will not turn

Why the chainsaw chain does not rotate when the engine is running even at full speed?

  • Drive sprocket. Or it is jammed, or the crown is so worn that it is not affected and The chaindoes not revolve on the chainsaw. In either case, you need to reassemble the sprocket to find out the exact reason why the chain won’t turn. If the crown is worn, the sprocket must be replaced (or the crown if the sprocket is assembled).
  • The brake chain is jammed As a result, the sprocket is blocked by the brake mechanism, and the motor runs. Stop the engine and release the brake. If it happened under load, the brake mechanism will have to be replaced, as well as the sprocket, because of the high temperature, many elements can melt and overheat.
stihl, chain, turn

All causes of chain breakage on a chainsaw

The main reason that the chain weakens and stretches is the use of illiquid oil, as well as the replacement of the lubricant recommended by the manufacturer of the chainsaw with a substitute. By the way, filling with summer oil when using the tool in the winter period often leads to the fact that there is no lubrication, which causes the possibility of failure of the oil pump drive and a significant decrease in its performance.

Why does the chain on a chainsaw break?? Such a problem can be explained by the negative influence of the following factors

  • The chain is too tight.
  • Wrong shank fit or guide bar problem.
  • Blade overheating because it is not lubricated.
  • Wrong chain type and drive sprocket nose shape that often causes sparks.

If a chainsaw user has encountered a situation where the saw headset loses its integrity, cuts poorly or the oil pump does not lubricate the blade, we recommend seeking help from the experts of the profile store “Benzo-Zip”. We employ true professionals who are well-versed in the design features of brand tools, as well as analogues of Chinese and Ukrainian production.

Our consultants are ready to give you comprehensive information about possible causes of chainring failure and offer you effective methods that you can use at home to restore your chain saw to working order. In addition, the catalog store exhibited lubricants and tires for chain saws popular in Ukraine, whose price is pleasantly affordable.

When to retighten the chain

It is strictly forbidden to work with a very slack chain.

Read also: What’s the angle at which to sharpen the knife

The chain that “jumps” while sawing can break the bar groove and damage the teeth of the sprocket.

A slipping chain can damage parts of the mechanism. But the most dangerous thing is operator’s injury. In spite of the brake and the catch, a loose chain can whip around on an unpredictable path, and this is extremely dangerous.

Tensioning is always checked before starting work. During operation it is possible to detect critical looseness by two signs:

When this occurs, switch off the engine and check the tensioning.

stihl, chain, turn

Idler units

The classic budget chainsaw chain tensioner is usually a threaded bolt with an adjusting component, standard or side-mounted. Adjustment of the chain tension is made with the included wrench or screwdriver.

The more expensive models are equipped with a handy tensioning device that allows the chain to be tensioned with a single movement of the lever or by turning the adjusting wheel.

In the first case, the tension is fixed with a lock nut, and in the second, the bar and chain tensioner are locked in a given position by setting the cover. In both variants a reliable fixation of the chain in a given position is guaranteed, it is possible to compensate for its extraction with minimal loss of working time.

Chainsaw construction and general classification of faults

Correctly find the source of failure, as well as perform correct and good repair of chain saws, for this you need to have a reliable understanding of its technical specificity. Repair of such equipment is not particularly difficult. Its schematic structure is quite simple. For convenience, the nodes in its composition can be divided into three types:

  • The main and very important element, without which further work is impossible, is the engine, a two-stroke, gasoline-powered. Permissible brands of gasoline are specified in the very passport of the device;
  • The second equally important component is its working part, which is responsible for cutting the materials themselves. This can include sawing mechanisms;
  • The third connecting unit includes the fuel supply and filtration system, oil, engine ignition, exhaust, etc.д.

Malfunctions are classified according to two nodes:

  • The engine itself is malfunctioning. Can’t start, without any reason it stalls, gets too hot, smokes very badly, unstably works with minimum and maximum load. Consequently, these units need to be repaired.
  • Trouble in the periphery. Here you can identify a variety of symptoms, which appear to malfunction in its operation. For example, in the case of a chainsaw shutting down during operation or a loss of power, there may be a clog in the gasoline supply system or the filter. If it cuts poorly, the chain may just be dull. Repair should begin with the study of auxiliary components, which will require the least time and money.

For convenience, before you start the repair, divide the chainsaw into sectors and look for faults directly there, where the problem is expected. The manual also gives a brief description of possible breakdowns and ways to fix them.

It should also be borne in mind that the sources for the same malfunction can be several factors. Therefore, it is important to be able to diagnose the cause of the failure in order to further perform the repair correctly and qualitatively. Before you start disassembling and repairing a chainsaw, you should estimate the possible causes and try to work only with them.

How to rule out the possible risks of buying counterfeit tires?

In the information field there are the signs by which it is easy to distinguish the original brand-name chainsaw from the most authentic counterfeit. With regard to tires, their advantages and disadvantages are manifested directly in operation.

In the domestic market of home appliances about 15% of the total sales volume of chainsaw parts is an unknown origin third-rate counterfeit, producing a standard resource in the best case by half.

It is not economical or safe to operate a chainsaw with a counterfeit guide bar and chain. A large proportion of injury situations are caused by the use of counterfeit tire and chain.

You can buy a quality and durable brand-name bar of the right model, without significant risks at a brand outlet or representative office of a licensed dealer company. In the absence of such a possibility should use the services of a solid, trusted online store.

Read also: What is the ratio of the chain saw

Signs of failure and self-repair of a chainsaw motor

One of the most frequent breakdowns of every chainsaw is the malfunction of its motor. Determining that this is the cause is easy enough. This problem may be indicated by several signs:

  • The chainsaw will not start;
  • The motor of the tool runs unsteadily and is very noisy;
  • The motor manages to start, but it constantly stalls;
  • The motor overheats very quickly;
  • Always operate your chain saw with the throttle trigger on;
  • The engine is smoking heavily and the output is dropping.

If you do not know how to make a chain saw worked quietly, then, first of all, you need to study its design. Only after that you can start your own repair.

The chainsaw will not start

If you have problems with starting the chainsaw, many people immediately blame the carburetor. In fact, there are several options and the premise of the malfunction can be no matter what:

  • Clogged air and/or fuel filter. The problem can be solved by cleaning the filter.
  • Lack of fuel in the tank. Yes, there is a reason. some owners forget about such a minor detail, as refueling gasoline saws and think that a couple of liters of gasoline in the tank is not enough to start the machine. There is enough gasoline for six months. Not counting that, the fuel in the tank should not be stored for more than 14 days, t.к. Gasoline evaporates and the octane rating is lost.
  • Check the pipe from the fuel tank to the carburetor. it could be clogged or broken, so gasoline does not flow into the tank.
  • No spark on the spark plug. Why no spark. the circumstances can be many: no contact, you need to change the spark plug or it flooded. Why a spark plug fills up on a chainsaw is another matter. But if it is out, you need to dry and re-install, then check for sparks. If there is a heavy sludge on the plug, it is recommended to change it.
  • Check the muffler for carbon deposits. If there is soot. thoroughly clean the muffler, but still recommended to take a chainsaw in the service center, that they checked the cylinder and piston, t.к. Carbon deposits are a sure sign that parts of the cylinder and piston assembly are not working properly.
  • The carburetor is clogged. How to properly adjust the chainsaw, so the carburetor worked perfectly, discussed in a separate article.

If none of the above methods failed, it means that the cause is more serious. the failure of the 1st of the nodes of the connecting rod and piston group. In this case, it is recommended to take your chainsaw to a service center.

Signs of failure and independent repair of a chainsaw motor

One of the most common faults with any chainsaw is its engine. Determining that this is the cause is fairly easy. There are several signs that may indicate this problem:

  • The chainsaw will not start;
  • The tool motor is unstable and very noisy;
  • The engine can be started, but it constantly stalls;
  • The engine overheats very quickly;
  • The chainsaw only runs on the suction;
  • The engine is smoking heavily and the power is dropping.

If you do not know how to make the chainsaw work quietly, then, first of all, you need to study its design. Only after that you can start an independent repair of the tool.

The chainsaw will not start

If you have trouble starting your chainsaw, many people blame the carburetor. In fact, there are several options and the cause of malfunction can be no matter what:

  • clogged air and or fuel filter. The problem is solved by filter cleaning.
  • No gas in the tank. Yes, it happens and such a reason. some owners forget about such a minor detail, how to fill gasoline saws and think that the pair of liters of gasoline and diesel fuel. There’s enough gasoline in the tank for six months. fuel in the tank should not be stored for more than 14 days.к. Gasoline evaporates and the octane rating goes out.
  • Check the pipe from the fuel tank to the carburetor. it could be clogged or broken, so gasoline does not flow into the tank.
  • No spark on the spark plug. Why no spark. the circumstances may be many: no contact, it is necessary to change the plug or it poured. Why does the spark plug fill up on the gasoline saw. this is another question. But if it has left, it is required to dry and re-install, then check the spark. If there is a lot of soot on the spark plug, it is recommended to change it.
  • Check the muffler for fouling. If there is soot. clean the muffler thoroughly, but it is still recommended to take your chain saw to a service center to have the cylinder and piston checked there, because the muffler.к. Carbon deposits are a sure sign that parts of the cylinder and piston group are not working properly.
  • The carburetor is clogged. How to properly adjust the chainsaw, so that the carburetor worked perfectly, discussed in a separate article.

If none of the above methods helped, it means that the cause is more serious. the failure of the 1st of the nodes of the connecting rod and piston group. In that case, it’s best to take your chain saw to a service center.

Problems with starting the engine

It’s very important to find the right cause of the problem, because otherwise we won’t be able to fix it. I have an almost new chainsaw, the engine runs fine, but the chain won’t cut. I can give gas. the engine responds, but then tries to stall, t. К. I don’t know how to do it myself.Yes by the way the chain turns tight but the chain does not work. The chain on the bar does not. If when you try to start the chain saw there is no extraneous noise (knocking, squealing, etc.), it often happens that the fault is not really there.д. ) very often it turns out that the breakage is not really there. For example, if not properly start the chainsaw and long pull on the suction, the engine just floods and starts it very hard.

In order to properly start a cold chain saw engine, set the lever or switch to the flap closed position. Then you have to pump the mixture into the carburetor, if there is a fuel pump. Pull the starter grip until resistance to the engine becomes palpable and yank vigorously in the amplitude of moving your hand to the side. After two or three such motions, the engine should first start and then stall. If this does not happen, then you must move the lever to the half throttle position or just to the operating position and then continue to run the chainsaw in this mode. Many chain saws “half throttle” is fixed automatically when pulling the choke. Some models have an ignition key switch, it is important to make sure it is on.

If the engine won’t start, the first thing to do is unscrew and inspect the spark plug. At idle, the chain should not move; the chainsaw will lose power or but not. There are cases when starting the engine in cold weather, flooding the combustion chamber with fuel. Then you also need to unscrew the plug, dry the combustion chamber idle, clean the plug, screw it in and repeat the start. If the chainsaw does not work, the chain does not rotate. It is desirable to check the spark immediately. unscrewed plug put on the cap with a high-voltage wire, put it on the cylinder and pull the starter. Visually observe the frequent blue spark. that’s good. Screw the spark plug back in and start the engine. If you get no spark, change the spark plug and try again. Not again. check high-voltage wire connection to spark plug, coil and ignition system.

In general, the condition of a spark plug is a good indicator of the type of fault.

  • Dry. Most likely no fuel mixture is getting into the cylinder. It is not the ignition system, so the spark plug is screwed back in and the fuel system is checked.
  • Wet, heavily splashed with fuel. The reason for the excess fuel mixture is either a violation of the starting rules, as described above, or improper adjustment of the carburetor.
  • The plug is covered with a black sludge. This may indicate use of poor-quality oil, a carburetor that hasn’t been properly adjusted, or an improperly calculated gasoline-to-oil ratio. The spark plug should be washed and cleaned of deposits with a sharp object (an awl or a needle), wiped with an emery cloth over the electrodes and repositioned.

Checking the spark plug, you need to pay attention to the gap between the electrodes: the normal value is between 0.5 and 0.65 mm. Damaged or worn gasket needs to be replaced.

Lubrication problems with the chain

For normal operation, the chain should be routinely lubricated to reduce friction between bar and links, also to prevent early wear of the links.

  • If the chainsaw does not lubricate the chain, it means that there is a problem with the oil pump. the oil does not flow because of a clogged channel. Lack of lubrication is the reason why the chain stretches or why the chain breaks. Clean the chain grooves, small chips are always getting in and clogging them. Can also rip the oil hose. If chain saw oil pump needs adjustment or repair, you’d better call service.
  • Oil dripping from the chain. Improperly selected grease. it’s very watery, so it doesn’t so much lubricate the links as it sprays on the wood. Changes the grease to a thicker one.

Your chain saw won’t idle or doesn’t run:

  • Your muffler is clogged. It is necessary to make a cleaning of the fouling.
  • The carburetor options are off. Need idle speed adjustment on a chainsaw. It is made by adjusting bolts marked L and H. How to adjust the idle speed, see the article about adjusting the carburetor.