Chainsaw does not give oil to the chain

Table of Contents:

Breakdowns, chain saw problems

Modern gasoline chain saw consists of certain mechanisms, the performance and efficiency of the tool when sawing different types of wood depend on the serviceability and coordinated operation of these mechanisms. Each of the nodes of the saw is distinguished by its service life, after which the tool must be repaired. You can do it yourself, having previously studied the common breakdowns and ways to fix them with your own hands.

The carburetor is one of the most important elements of a chainsaw, the main function of which is to enrich fuel with air and instantly feed the ready mixture into the cylinder of the power unit.

The following signs tell about carburetor malfunctions:

  • Problems starting the gasoline-powered saw. it takes more effort than usual to start the engine;
  • unstable operation of the ICE in different modes. noticeable interruptions in the rotation of the engine at idle speed, as well as during the transition to low and high revolutions;
  • A sharp increase in the amount of fuel consumed. on average the amount of fuel increases by 20-30%;
  • Exhaust emissions increase. gas volume increases 50-60% and fumes turn a dark blue, brown or black color.

Always check that the chainsaw is in good working order and that the engine is running properly. Before you start tuning you will need to wash or replace the filter, check the integrity of the fuel pipes, as well as make sure there are no burrs and other damage on the surface of the cylinder and other parts of the power unit chain saw.

For the possibility of independent adjustment of the chain saw in the device of its carburetor provides steel spring-loaded screws. Their quantity and marking depends on the brand-manufacturer of the chainsaw.

The procedure of adjusting the fuel unit for most chainsaws looks almost the same.

The algorithm of actions should be as follows:

  • First of all you must stop the saw and wait till its internal combustion engine cools down;
  • After that, all the screws available in the device of her carburetor should be screwed in the direction of the clock hand to the stop;
  • Then each of the screws must be turned a fourth or fifth of a turn in the opposite direction;
  • Next, you need to set the power unit to work at low rpm. To do this, you need to start turning the screw slowly in different directions. Once the motor is as quiet and stable as possible, the screw should be left;
  • To adjust the idle speed on the chainsaw. it is necessary to pay attention to the chain. If it rotates on the bar, then you need to find the position of the screw where it will stand still;
  • In the end it remains to adjust the work of the internal combustion engine at high revolutions. To do this, connect a tachometer to the engine cylinder and start turning the appropriate screw until the indicators on the scale of the device and the instructions in the manual coincide. For example if the manual says that the maximum rpm of the saw should be 12500 rpm, then this is the same number that you can see on the tachometer scale when adjusting the saw.

To check the chainsaw after adjustment, it is necessary to switch it off and wait until the engine cools down completely. After that, you need to start the engine and begin to gently squeeze the gas pedal lever. If at the same time the power unit picks up smoothly, it means that the adjustment of the saw has been done correctly.

Reasons why a chain saw cuts crooked?

There are several common factors that impair the balance of the saw’s cutting set and spoil the cutting trimmer line.

  • Uneven self-sharpening of the cutting teeth. quite often the chainsaw saw cuts sideways because of a faulty sequence when sharpening the saw organ. According to the instructions, the teeth should be sharpened at the same distance. If this rule is violated, the teeth that have been ground more than the others will wear out faster. As a result, the chain is noticeably off-center, leaving behind a crooked sloppy cutting trimmer line;
  • Operating a chain that does not match the bar. each bar has its own characteristics, including the width of the groove. It is what makes the cutter bar fit on the guide rail. If you install a chain with a 1.3 mm pitch on a bar with a 1.3 mm fit width, there will be a 0.2 mm gap. It will lead to uneven movement of the cutting attachment on the saw blade and the chain saw will cut crookedly as a result;
  • Excessive wear on the chain’s cutting teeth. if the chainsaw is running sideways. it can indicate excessive wear on the chain. To check the cutter bar, remove it from the bar and inspect the plane of contact with the guide bar. If the cutting teeth are really worn, then the chain must be replaced without trying to sharpen it.

The main reason for premature chain wear can be irregular lubrication of the saw chain. If it is running irregularly, the chain will lubricate in parts. This causes the teeth that are not supplied with oil to heat up more quickly and wear out.

Engine stalls

Engine starts but stops when idling or under load. If this happens, it is often necessary to do the same steps as described above.

Why is the chainsaw not cutting under load?

How to adjust your chainsaw depends on exactly when the problems start:

Stops immediately after starting:

  • The fuel mixture is not mixed properly and contains too much oil, the gasoline octane rating is lower than it should be, which is why the chain saw only runs on a blow-off or immediately shuts down.
  • Soot on spark plug or improper gap between spark plug and wire.

Stops and does not work at idle:

  • The muffler is clogged. Need to clean the fouling.
  • The carburettor settings are wrong. Need to adjust the idle speed on the chainsaw. It is done with the help of adjustment screws marked L and H. How to adjust the idle speed, see the article about adjusting the carburetor.

Can’t cut off at high rpm and only works on the breather

  • Clogged air or fuel filter. Clean and check the seals.
  • The breather valve is clogged, which prevents fuel and gasoline pumping on your chain saw. Take a needle and gently clean the breather plug.
  • Gasoline pump malfunction. Remove the pump and check if gasoline is leaking from it. If leaking: Replace gasket or pump.

Chainsaw won’t cut under load and stops

  • Clogged air filter. It is necessary to take out the filter, clean it well or even rinse and dry it and put it back.
  • Incorrect petrol-oil mix ratio. Drain the fuel and mix the oil and gasoline in the right proportions.

Engine is “popping”/ “sneezing

If you hear popping noises when working, there’s a problem with the muffler or carburetor. How to make chain saw run quietly? It depends on which particular unit is malfunctioning.

The chainsaw shoots into the carburetor :

  • Too late ignition. the fuel-air mixture does not have time to burn through the cylinder, so you get a sound like a small explosion.
  • Depleted fuel-air mixture. There is too little gasoline in the mixture. adjustment of the chainsaw, or more precisely of the nozzles, is needed to increase the fuel supply. Why does the chain saw throttle on its own. same reason.

The chainsaw shoots into the muffler :

  • Enriched air-fuel mixture. Reasons why your chain saw fires? There is too much gasoline in the mixture, but not enough air, so the mixture doesn’t combust completely in the chamber and partially burns out in the muffler. Carbon deposits on the exhaust. a clear sign of this. The air cleaner needs to be cleaned or the carburetor needs adjusting.

Calibration algorithm and safety precautions for troubleshooting chainsaw carburetor

Adjusting the carburetor is done in two steps:

For the basic calibration turn the H and L screws all the way in and then back out 1.5 turns. The final adjustment requires the engine to be warmed up for 5-10 minutes at low rpm.

A final calibration is performed by turning the idle speed screw until the engine reaches a minimum RPM (the engine should be stable and the chain should be stationary). If the engine stops when idling, turn the screw back. If the saw chain is still in motion, continue to turn counterclockwise.

The calibration is verified by a test:

  • Acceleration (with the gas pedal lightly depressed, the engine should rev up quickly to maximum speed).
  • maximum RPM (if the ignition is intermittent, the H screw should be loosened slightly).
  • Idling (the chain should not move and the engine should rev up as quickly as possible).

If the chainsaw owner is not familiar with the carburetor and doesn’t have the right tool for adjustment, it’s time to call in a professional. The carburetor is a very complex unit, so any improper action can lead to irreversible consequences, such as complete engine failure.

The engine is “firing.

If you hear strange noises when you work, like gunshots, then there is a problem with the muffler or carburetor. How to make a chain saw run quietly? It depends on which component is malfunctioning.

Shoots the carburetor:

  • Ignition is too late. the fuel-air mixture does not have time to burn through the cylinder, so you get a sound like a small explosion.
  • Depleted fuel-air mixture. There is too little gasoline in the mixture. you need to adjust the chainsaw, or rather the jets, to increase the fuel supply. Why the chainsaw fires on its own. for the same reason.

Fires the muffler:

  • Enriched air-fuel mixture. Why does the chain saw shoot?? There is too much gasoline in the mixture and not enough air, that’s why the mixture doesn’t combust completely in the chamber and partially burns down in the muffler. Fouling on the tailpipe is a clear sign. Need to clean the air filter or adjust the carburetor.

What are the causes of chain saw malfunctions?

Every year, manufacturers develop equipment that is more complex and reliable in design, but easy to operate. Chainsaws are no exception. But no matter what modern features are included in the device, it is difficult to avoid a chainsaw malfunction. Failure diagnostics can be carried out independently, using the instruction manual. Let’s look at the main types of malfunctions encountered.

Saws badly

Here’s why the chain saw cuts awkwardly. It shows up when sawing under barrel load, when the guide bar moves to the side little by little. This is especially noticeable when sawing a wide trunk using the double-cut method, first from the top, then from the bottom. As a result, the output is an uneven sawed-off surface, which in some cases is unacceptable. Example. facing bars.

  • Unevenly sharpened saw teeth. This is the most common reason why the product cuts obliquely. Teeth should be ground at equal distance to avoid problems in cutting. Optimal solution is to buy a sharpening machine that adjusts to the most worn tooth of the saw mechanism. Or go to a workshop that has such equipment. Result. all teeth are the same size.
  • The chain or bar used does not fit the parameters. The width of the groove must be taken into account when purchasing these items. This is not only important for proper operation of the machine, but also for safe sawing operations.
  • The saw headset of the device is very worn out. If unit does not cut well, there can be excessive wear on the top loading bar. Visual inspection will indicate the problem. If the right or left side of the bar is more worn, it needs to be replaced with a new one. In case of increased wear, it makes sense to perform a complete diagnosis of the lubrication system. This is often the cause of increased wear on one side of the chain.

In case of complicated repairs it is better to take the machine to a specialized workshop.

Warms up

If a new chain saw heats up, it is because the piston group elements have not yet run in. In this case, it is necessary to run in, preventing overheating. If it is a problem with a machine that is already in use, it could be caused by delayed ignition. Sometimes the device overheats due to a violation of the proportions of the fuel mixture.

It does not rev up

The problem occurs at startup. Chainsaw does not rev up, runs jerkily or idles, shuts down, starts by pushing, kicks back when starting.

  • If the device does not hold idle revolutions, the causes may be a clogged filter, poor-quality fuel mixture, carburetor, ignition module or deformation of engine elements under load.
  • If full power is not available, check carburetor. You might have the wrong settings on the implement. Throttle control knob setting need to be checked for corkscrews on throttle shaft. Adjust fuel supply at high RPM.
  • Does not drop rpm. The problem is that the unit may quickly accelerate at high rpm and not decelerate. It is necessary to check throttle operation, toggle switch switching, presence of corkscrew on throttle shaft.
  • Gains speed uncontrollably. The causes may be in the carburetor, fuel supply system, connecting elements leading to the carburetor.
  • Throttle control valve works only on choke. The cause is improper preparation of the fuel mixture, a large amount of oil.

These are the most common causes of this type of problem.

Oil leak

Owners of chainsaws often face the problem when oil leaks from below, from under the unit. The cause is a damaged oil hose that connects to the pump.

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No spark

Ignition problems are due to weak or no spark on the chainsaw. When checking the spark plug there may be a blue spark. This indicates that everything is fine. If no spark, check high-voltage cable. It may have a broken wire. Another possibility why there is no spark is due to improper clearance between the ignition module and the flywheel coil. The norm for this indicator is 0.2 mm.

No gasoline coming in

To find the source of the breakdown and determine why the unit is not pumping gasoline, disconnect the gas line from the carburetor. Try pumping fuel. If it is feeding slowly, there may be a problem:

Specialists do not fill the tank to the brim. This can put the unit out of service.


If the equipment is smoking, it has a power loss, pay attention to the engine. Unstable starting, overheating, etc. could also indicate a malfunction.

The chain spins when idling

If the chainsaw chain spins when idling, it may be due to the following factors:

  • The clutch spring is snapped. Visual signs: the chain is turning almost always, even if the engine starts erratically.
  • A piece of the clutch has chipped off, the spring has come off. Signs: chain saw springs up on its own, you hear strange noises.
  • Clutch is worn out. Signs: the chainring slips frequently.

Saw headset idling caused by clutch problems.

The chain is not cutting

Chain saw’s reduced performance is caused by dull chain teeth. This is the most common problem, since sharpening needs to be done regularly. How to do this with a machine, file or grinder, read the corresponding article.

Stalls at maximum rpm and runs only on the suction

  • Clogged air or fuel filter. The seals need to be cleaned and checked.
  • The blower is dead and so the fuel isn’t flowing and the gasoline pump on the chainsaw isn’t working. Take a needle and carefully clean the bore.
  • Faulty fuel pump. Take out the pump and check if gas is leaking from it. If it is oozing, replace the gasket or the pump itself.

Shooting into the muffler:

  • Enriched air-fuel mixture. Why the chainsaw shoots up? The mixture has too much gasoline and too little air, so the mixture does not burn out completely in the chamber and partially burns out in the muffler. Exhaust deposits are an obvious sign of this. Need air filter cleaning or carburetor adjustment.

Shooting into the carburetor:

  • Ignition too late the air-fuel mixture does not have time to burn in the cylinder, so you get a sound like a small explosion.
  • Lean air/fuel mixture. Too little gasoline gets into the mix requires adjustment of the chainsaw, or more precisely, the jets, in order to increase the fuel supply. Why chain sawPulls itself for the same reason.

See no oil flows into the chain of a Husqvarna chainsaw and other videos

If the chainsaw chain does not receive oil during work, it is necessary to look for the cause of the problem. In fact, there may be many factors that influence this process. You need to take the chainsaw apart and find the root cause. Possible causes of this process will be described below.

Several factors can cause a lack of oil supply to the chain when the chainsaw is running, and it is necessary to disassemble the chainsaw to determine the cause.

Chainsaw Specifications

This model is in significant demand among consumers, but most often it is bought by gardeners to work on their plots. Use the saw not only for firewood preparation, but also for construction. In general, are characterized by compact size. They are equipped with a fairly powerful engine. Their main advantages are easy starting and reliable operation, thanks to the quality of the electronic ignition system and the fuel pump.

Completely safe to use this chainsaw. It has a built-in safety system that automatically starts the inertia brake for the chain. In the same mode, it is also lubricated.

There will be no problems with chainsaw starting even in winter, as it has a fuel primer. The starter drum is equipped with a dirt-cleaning impeller. In addition, the manufacturers have put the device in the CCS system. This design traps residual particles and is also used when the air filter is used for long periods of time.

Developers, in order to extend the life of the chain saw on the piston group cylinder, made chrome walls. This model also has an ergonomic handle and anti-vibration system.

Specifics of Chinese chainsaws repair

A large proportion of the imported chainsaw range is made up of chainsaws made in China. Many models have been copied with more or less success from the best European designs.

The main advantage of Chinese products of the budget segment is the high level of interchangeability of spare parts, units and systems. To repair Chinese chainsaws in some cases it is possible to use parts from models of other manufacturers that are identical in power and purpose.

The Partner 350 Chain Tool: Causes of Failure, Repair with Your Own Hands

Almost every summer resident or villager has a chainsaw in his arsenal, especially the partner model 350. However, sometimes this tool breaks down. If you are faced with such a problem, do not despair, because its mechanism is so simple that the repair can be done even with your own hands. The article deals with the main causes of breaks and their elimination.

What are the possible malfunctions

Chainsaw malfunctions can be divided into groups:

  • Engine malfunctions (ignition, exhaust and cylinder systems, fuel supply).
  • Faulty components such as the clutch, chain brake, lubrication system, or tire.

Chain saw motor failure is more common than others. It takes most of the time to find and repair it. As a rule, it boils down to manifestations such as the engine running erratically or stopping completely, the engine not starting, not developing power.

Before you start to repair your chainsaw, first check all the possible causes of malfunctions or even better watch the video. Fortunately, today you can find any interesting material on the Internet.

Then you need to prepare the necessary tools to repair the failures:

The chain is an important element of this type of equipment

The chain is a very important part of a chainsaw, because it cuts the wood. It is made of special steel. Chains come in different sizes and pitches. Even though the chain is made of special metal alloys, sooner or later it gets blunt.

How do we know when the chain is blunt?? often than not, the chainsaw user notices that the chain has blunted too much at the wrong time. It leads to poor performance and reduces the life of the chainsaw. The first signs of bluntness are excessive vibration. Next, you can pay attention to too slow cutting.

In fact, you can even take a basic look at the saw’s teeth and you can easily tell if it has blunted.

Fuel supply problem

This kind of chainsaw malfunction will be obtained by examining the spark plug. The cylinder can’t get fuel for a variety of reasons:

  • The fuel filter installed in the tank is heavily clogged.
  • The hole in the tank cap is clogged, preventing gasoline from leaking.
  • Not enough fuel coming out of the carburetor or not.

If there is no proper ratio or insufficient fuel flow between the gasoline and mixing air in the carburetor, you should check if the ducts and carburetor air filter are clogged. In addition, you may need to tune it.

Before cleaning, the filter is carefully removed. Washed with a detergent and then dried. Then put it back in place.

Adjusting the carburetor is usually done with the help of screws. the maximum and minimum rpm. When carrying it out, it is necessary to strictly follow the instructions for the repair of a chainsaw, otherwise you can ruin the motor. Sometimes manufacturers leave only one adjustment screw to prevent inexperienced craftsmen from tampering with the carburetor.

If debugging does not fix anything, then it is worth cleaning channels and filter mesh, as well as check the integrity of the diaphragm.

Chainsaw chain lubrication system

Every chainsaw, regardless of its model, brand, and class has about the same structure. It consists of several important assemblies, among which is the lubrication system. Without the latter the operation of the power unit is impossible. Forced lubrication of the saw chain reduces the risk of excessive wear and tear that is essential in a situation where there is constant friction between the blade and the guide bar, and unavoidable heat. By lubricating the chain lubrication system friction is alleviated and the chain saw operator saves the time and effort of repairing or replacing the element.

What is the force feed lubrication system?

STIHL chain saw lubrication system and this component in other power units is identical, depending on the speed and number of revolutions of the chainsaw heart, the engine. Oil is applied to the cutting element, or more precisely, the bar. This is made possible by a special pump.

Chainsaw chain lubrication pump transfers consumable material with high adhesive properties to the saw headset. Only high quality consumables should be used, because only these, even at maximum chainring speed, can be evenly distributed throughout the bar.

Design of the lubrication system

Chain lubrication system of chainsaw, taking into account the manufacturer of the tool, may differ slightly in design features, according to the parts used in the creation of this node. In this case, the features do not affect the scheme of connection of the system, as well as the total number of parts used.

  • oil reservoir located in the engine crankcase;
  • Tank filter (an element located directly in the tank);
  • the oil line, which looks like a small diameter hose made of high-quality rubber
  • the pump itself, can be considered the heart of this assembly;
  • The worm gears (worm gears) that transmit the power from the motor to the heart of the assembly.

Some papers by powertrain repair specialists describe the guide bar not just as a saw headset, but as one of the components of the lubrication system. Why so? This can be explained by the special holes in the bar through which the oil flows. By the way, the chain itself can be considered as a participant of lubricating consumable transportation, because this mechanism also has parts related to oil distribution.

How the assembly works?

The heart of the node is the pump, consider the principle of its functioning.

  • As soon as the engine speed increases the pinion on the main shaft operates the pump shaft by means of a worm drive.
  • The pump shaft works by creating pressure which is transmitted to the oil gallery and forces oil out to the guide bar.
  • The end of the lubrication channel is located at the junction of the power unit crankcase and the guide rail where the longitudinal groove is located. The latter is where the lubrication channel is located.

What does the groove do?? It provides the oil flow to the guide bar, no matter what the chain tension level is. This ensures that the oil gets to the guide bar even when it is not in the normal position for operation.

Do not forget that the chain mechanism is involved in the lubrication process. Depending on the design features, the chain has holes or grooves through which the lubricant is distributed over the bar. Oil will flow to the bar faster as soon as the engine speed is higher.

Certain models of the tool have pumps that can be additionally adjusted (the operator will be able to adjust the pump capacity, depending on the amount of work and conditions of the saw). If necessary the oil flow is reduced, if it has to be increased the oil flow is adjusted accordingly.

Be sure to check out this article, which explains the peculiarities of chain oil supply for STIHL chain saws. The system may vary depending on the brand of chainsaw.

The main advantage of this feature is the ability to save consumables. By the way, if you are interested in what oil to pour to lubricate the chain saw chain, choose what is recommended by the manufacturer of your power unit.

Breakdowns and how to fix them

Considering the types of faults in the lubrication system, we can distinguish two categories of them:

  • general breakdowns that occur in all types of power units;
  • Individual, which depend on the type of pump, on the features of the worm type transmission, on the design and other features of a particular chainsaw.

Important! If the lubrication system does not work, it is not recommended to use the saw. So you will ruin not only the chain, but also the guide bar and the main sprocket, which leads to the need for a large investment in the repair of the unit.

“Symptoms” of a faulty lubrication system:

  • The chain mechanism is dry, pale, no shine;
  • The chain is quickly stretched after installation;
  • the guide bar gets hot, the paint melts;
  • oil remains in the same volume in the reservoir, despite heavy use of the tool;
  • The cutting efficiency of the chain is greatly reduced.

All this indicates that the lubrication system is malfunctioning or that it is functioning intermittently.

If the consumable is coming in, the cause of the problematic operation of the lubrication unit is most likely a clogged filter, which can be cleaned or replaced with a new one. If possible after this manipulation, the flow of consumable material is adjusted.

If the consumable does not arrive, then you need to make additional diagnostics, because, in all likelihood, the problem is more serious.

Please note that it is not always necessary to remove the guide bar in order to check the lubrication system. Alternatively, the end of the bar is directed sideways (using a billet) from the cutting direction, maximizing the speed, holding the bar (its end) at 10 centimeters from the billet. You will see the corresponding spots when oil is applied.

Chains for chainsaws. types, lubrication system, tensioning, video

The efficiency of the chainsaw and the quality of wood sawing largely depends on the chain installed on the garden tool. In order for customers to be able to quickly choose those or other chains, manufacturers divide their chains into certain types. They differ in size, characteristics and capabilities. this is what you need to keep in mind when choosing chains for your chores.

What chains are available for chainsaws?

Depending on the purpose, that is, on the planned direction of sawing wood, chains for utility saws are divided directly into such types;

  • longitudinal. the peculiarity of this type of chainset is that when it is mounted and used on a garden tool, the productivity of the latter increases by almost 2 times;
  • transverse. by installing a transverse chainset with pobedite tips, the chainsaw operator is able to noticeably reduce the “aggressiveness” of the garden tool and reduce the load on the built-in factory motor, thereby making the engine vibration less noticeable.

Another parameter that is very important for a chain’s stable operation, and that is how chains are continuously divided up, is their pitch. Chainsaw chain pitch is the length of the gap between the three links.

There are headsets on the market with these pitch characteristics:

  • 0,25 or 1/4″. these parts are used in one-hand utility saws, which are not very powerful. The most frequent use of this type of garden tools is for precision wood cutting and short-term work in very confined spaces;
  • 0.325 or 3/8″. most chain saws are equipped with this type of headset;
  • 0.404 or 3/4″. this type of carbide saw blade has larger dimensions. These are exclusively fitted to powerful professional garden tools that can be used on aerated concrete.

All the available sawing parts are made taking into account that the bigger they are, the better their performance is. However, with the increase in the size of the saw elements increases the given width of cutting wood. To make the resistance of the material to be sawn less noticeable, the large headsets should only be mounted on saws with an impressive power reserve.

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Quite often manufacturers divide the saw elements according to the thickness of their shanks, which must necessarily coincide with the given values of the grooves of the standard tires of garden tools. Compliance with this rule will improve the reliability of fixing the part on the bar, and prevent the headset from slipping.

Another important parameter is the number of links in the harness. The higher the number, the faster the chain saw will cut through hardwood or concrete.

How the chainsaw chain lubrication system works?

The automatic oiling system on the saw heads works according to a fairly simple principle. The chainsaw chain is lubricated continuously by the built-in oil pump, the speed of which depends on the rotation speed of the engine crankshaft. As soon as the operator pulls the throttle trigger, increasing the engine speed of the saw, the gear on the motor’s main shaft increases the speed of the pump shaft.

The chainsaw is equipped with a worm gear for stable interaction between the gear and the pump shaft. While the pump shaft speed increases, the pump creates the pressure necessary to pump oil towards the bar.

The end of the oil line is in the part with the longitudinal groove. This is also where the guide bar connects to the gasoline chain saw’s original crankcase.

When the bar is mounted on a household garden tool, the part is connected to the oil duct, which allows the lubricant to flow unobstructed to the saw headset.

How to lubricate a chainsaw chain?

During the cutting operation the lubrication of the chain saw distributes not only on the guide bar but also on the chain used for cutting. As soon as the lubricant enters the bar, the saw-mounted bar originally with holes or small, inconspicuous perforations starts to move. During normal use of a garden tool the speed of the oil in the bar increases as the engine speed increases.

Some saws come equipped with separate adjustment mechanisms, the main task of which is to enable operators to adjust the amount of oil required to lubricate the headset. This feature saves grease, reduces slippage of the saw element and prevents premature wear of the saw’s working parts.

Often beginners in woodturning machines don’t know how to lubricate a chainsaw’s needle bearing. Husqvarna and STIHL oils are the best for this application. It’s fairly easy to apply oil to lubricate this element. This initially requires an ordinary syringe, which will help to quickly pour the product, without spilling it, and preventing dust from getting into it.

How to shorten the chain of a chainsaw with their own hands?

Prolonged use of the headset causes it to gradually sag. Faced with this for the first time, many inexperienced sawyers do not know what to do if the chain on the chainsaw is stretched. To solve the problem, the first thing you need to do is assess the level of slack. After that, you can begin to prepare the tools that will help shorten the chain on the chainsaw.

The subsequent procedure should look as follows:

  • First gently separate the links in the sagging part of the set. To do this with an angle grinder will be quite difficult and dangerous, especially if you are repairing a hard diamond chain. It’s best to detach the links with a file or an ordinary file. When performing the procedure, each side of the link must be ground. Then you need to unscrew the stripped rivets with the prepared drift;
  • Immediately after the operator has been able to accurately unbolt the chain, it is necessary to set aside the disconnected part of the headset. They should not be thrown away as they may be needed later to replace worn links;
  • The operator must then rivet the chain evenly. For this purpose it is necessary to count in advance the teeth available in the device of the saw element, and carefully to connect between themselves the remaining links, using a rivet. To do this, you need to press the sides of the links tightly against the rivet being used;
  • Then you can proceed to the welding of the links. Welded to each other elements will need to be carefully deburred with a nail file, otherwise bulges and other traces of welding will severely scratch the surface of the bar;
  • Before you rivet the chainsaw chain, you need to let it cool down. After that, a household drill should be equipped with a pre-prepared 7-centimeter steel billet, made from an ordinary nail;

Chain lubrication of chain saws: basic principles and tips

When the chainsaw chain is moving, a great deal of heat is released in the bar groove as a result of friction. If there is no oil flow to the chainsaw chain, you must stop work and take all measures to correct the faulty lubrication system. The combination of heavy loads and overheating results in accelerated wear and early failure of the headset.

  • All chainsaws and their electric counterparts, without exception, are equipped with the same-type action system that provides lubrication of the bar, saw chain and its drive components.
  • The standard part of this device is a reservoir that pumps chain oil to a fixed or adjustable-flow pump inlet.
  • The dosed amount of operating-liquid then flows into the guide bar groove, where it is evenly distributed by the saw chain shanks over the guide bar and the working surface of the chainring gear.

Tires with a length of 400 mm or more are fitted with a sprocket wheel. Periodic lubrication of the bearing is done individually after 6 to 8 hours of operation.

Signs of a faulty lubrication system

Choosing the right lubricant and keeping the system working flawlessly contribute to good lubrication, effective cooling of the chain saw and total use of its life.

There are several external signs that the chain on a chainsaw is not lubricated. Above all, it is:

  • Constant oil level in the reservoir;
  • Increased load on the engine;
  • accelerated wear of the cutting edges of the saw links;
  • A characteristic smell of overheated wood.

In the simplest case, the cause of oil starvation can be clogged with sawdust in the oil ducts. This defect is common to budget headsets that lack easy access to problem areas.

Causes of reduced performance and system efficiency

There are several reasons why the chain is not being lubricated in the correct quantity. Of the most typical failures, we can name:

  • clogging of the filter located in the oil tank;
  • Mechanical failure of one of the elements of the worm drive pump;
  • the oil pressure system is blocked in the winter because the oil in the system is too thick.

In the latter case, the drives and all parts of the pump work under increased loads that initiate serious mechanical damage.

Advantages of high-class oil pumps

Repairability of collapsible pumps is sufficient to restore the performance of the unit at home.

Gears of the pump drive of budget chainsaws are mostly polymer. Technically advanced, brand-name models with adjustable capacity are equipped with drive mechanisms made of non-ferrous metals. The cost of such systems is compensated by economical, up to 50%, working fluid consumption.

Peculiarities of self-troubleshooting

Full self-repair of chain saw chain lubrication, all things being equal, requires knowledge of the interaction of all elements of the system, the availability of tools and locksmith skills.

Many chainsaws can be repaired with partial or complete removal of all accessories. For complicated repairs, it is better to use the capabilities and technical capacity of service shops.

Parts with chopped threads, damaged splines or loose threads in the lubrication system of the STIHL-180 and other chain saws should be replaced.

If there is no oil supply to the headset structure when the tank is primed, the cause is in the pump itself. Disassembly and disassembly of the mechanism will help to find the defective parts and repair the problem by replacing them.

Checking the system for oil output and performance

Contamination of the oil filter manifests itself by a significant decrease in pump performance. It is easy to check this parameter. To do this, hold the chain saw headset over a piece of clean paper while it is running at operating speed.

The density and size of the oil film is a good indicator of the condition of the system and the difficulty of repair.

On the question of why the repaired lubrication system works, but does not go oil to the chain in the right amount. there is no unambiguous answer. The reason for failure may be made during assembly errors, failure of standard adjustments, mismatch between the density and viscosity of the selected compound to the declared characteristics.

Oil starvation of headsets is possible if a domestic saw with a non-adjustable pump is equipped with a longer high-performance bar, which is included in the chainsaws of professional class.

Specifics of Chinese chainsaws repair

A considerable part of the imported chainsaw assortment is the chainsaws made in China. Many models are copied from the best European designs with more or less success.

The main advantage of Chinese products of the budget segment is the high level of interchangeability of spare parts, assemblies and systems. To repair Chinese chainsaws in some cases it is possible to use parts from models of other manufacturers that are identical in power and purpose.

Repairing the STIHL MS 180 carburetor

Repairing the STIHL MS 180 carburetor is a very difficult process. Note that during repair, there is almost no risk of sudden changes in the cylinder-piston group.

If the chainsaw does not start, then apply the following steps:

1) Open and close the fuel filler cap;

2) it is advisable to remove the plug and then drain it;

If after that no positive results, it is better to check the condition of the air filter, the gasoline supply process and the spark plug functioning.

This problem is related to the valve (needle valve), which is clogged, and as a consequence, a vacuum is formed. All about repairing chainsaws with your own hands I’m not leaking oil from why in a chainsaw. To eliminate this inconvenience, it is necessary to clean the valve (teardrop) with a needle.

Systematically check the filter, if the muffler is clogged, then the device will not be able to give the power that it is built in.

If you have bought a chain saw with a warranty (there is usually no other option), take it to a service center immediately.

The STIHL MS 180 chain saw is very easy to operate, has good ergonomics and offers a number of tangible benefits.

It’s a 2010 model year. Used mostly at the cottage and on my annual trips in August in Karelia. I wouldn’t say that I’ve really beaten the shit out of it, but it is used sparingly and rarely. Never built a log house with it. Just to cut down a tree or a pole I’ve been suffering from this problem for a year now: there’s always a puddle of oil under the saw. It’s coming out of the chain lubrication reservoir. Changed the pump 2 times, changed the rubber, in which the pump piston is inserted, but it still leaks.In summer, a full tank can leak out overnight. By long experience, I realized that it leaked not from the pump, but from under the metal strip, which is under the “tire”. There’s a hole at the top with a piece of PVC tubing inserted that goes into the oil reservoir.

Well, it’s always leaking from there. I tried to leave the saw on its side, twisting it this way and that way No matter what you do, there’s a puddle under the saw. Maybe someone has experienced similar problems? Real cure or just suffer all the time? It wasn’t leaking before.

Problems with the chain saw chain

In addition to problems with the engine, chainsaws can have problems in operation due to faulty cutting (sawing) assembly, which consists of an oil pump, bar and saw chain.

No oil supply to the tire

Usually, if there is no oil flow to the chainsaw chain, it is necessary to check the channels through which the oil flows to the bar, and clean them from contamination. If the previous steps did not detect the cause of the problem, you will have to check the oil pump. To do this you need:

  • Remove part of the chainsaw cover;
  • Remove the clutch;
  • Having unscrewed 3 screws, remove the cover hiding the pump;
  • get to the worm gear, which turns the pump shaft.

If the threads on it are worn, the shaft does not rotate, the pump does not work, the chain is not lubricated. Worn gears need to be replaced. You may also remove the oil pump and try pumping oil by hand. If it isn’t pumping, the pump needs to be replaced.

Lack of lubricant can also be due to lubricant leaking. Check that the tubes coming from the oil pump are connected and tight. If the tightness is compromised, the tubes are replaced with new ones.

The chain is torn

If the chain broke while the chainsaw was working, then it could happen when it hit a hard object, such as a nail. If, on the other hand, the chain breaks repeatedly, it may be due to.

  • Poor quality of metal from which the saw chain is made. It is necessary to buy chainsaws from reputable brands.
  • The chain could overheat because of poor lubrication. As a result, the saw overheats, the properties of the metal change, and it tears under the load. It is required to check the entire chain saw lubrication system (discussed above).

Also learn about the causes of frequent chain breaks in this video.

The chain won’t turn

This defect often occurs to chain saw inexperienced owners. They forget to take the brake off after starting the engine. As a result the chain won’t turn, the brake system overheats and the clutch mechanism fails. The problem can be solved by unbraking the saw. If the clutch is not “burned out” you will notice the chain turning. Otherwise the clutch has to be replaced.

Chains blunt quickly

Low-quality saw chain is the main reason for dull chain. Trying to save money on brand-name chains, chainsaw owners buy chain saws from unknown producers or inexperiencedly buy imitations of well-known brands. It is best to buy the cutting element for a chain saw from brand-name stores. STIHL saw chains are very popular with owners of these machines.

The chain does not stop

If you notice while working with a chainsaw that the saw chain does not stop at the right moment, this breakdown can have 2 options.

  • The belt is dirty. Dirt, filings, dust, etc., can get under the belt when the saw is in operation.д. This causes the brakes to lock and the chain will not stop when you release the throttle. Fix the problem by cleaning the assembly.
  • Brake band is worn out. It is necessary to replace this element of braking system.

The chain is jammed

This happens when the sprocket or idler wears out. Chain usually starts to jam under load. But, without load, the saw can rotate. The photo below shows a worn chainsaw drive sprocket.

In the following photo you can see that the reason why the chain sticks is in the sprocket location.

But what to do if the chain saw is completely jammed and all efforts to pull the starter motor are ineffective?? This problem is sometimes seen in chain saws made in China. This is caused by the bolts used to bolt the motor to the plastic shroud of the machine unscrewed by vibration. These screws are located right under the flywheel (magneto). The arrows on the photo below show the locations of the problematic bolts.

As they unscrew they start to rub against the handwheel and can totally jam the chainsaw. The following photo shows the flywheel with existing bolt scuffs.

To fix the problem, you will need to remove the flywheel from the engine shaft and tighten the bolts.

The chain saw is not cutting properly

This problem can occur if the chain is blunt or not properly sharpened. This applies in particular to new chain saws. But if the bar is worn out, even after replacing the chain, you will notice that the saw swings to the side. The wear of the bar can easily be determined by placing it on a flat table and placing an angle against it, as shown in the following photo.

See also  How to tension the chain correctly on a STIHL chain saw

In this case you can see that there is a gap of about 2 mm between the guide bar and the angle bar. It is because of this one-sided wear of the bar that the chainsaw saws crookedly. The problem can only be solved by the replacement of the guide bar with a new one.

Peculiarities of maintenance and self-repair of Husqvarna chainsaws (Husqvarna)

Husqvarna chain saws are indispensable helpers in the household. With the help of gasoline motorized equipment it is possible to perform various works related to construction, logging and simple limbing. With proper handling of the tool it will serve for a long time, but in the process of operation as a result of intensive loads various malfunctions occur.

In case of detection of minor defects do not apply to service centers and workshops, current Husqvarna chain saw repair is performed independently, it is necessary to investigate and disassemble the probable causes of defects and ways to fix them.

Why does it not start and what to do?

Among the malfunctions of Husqvarna chain saws one can single out poor engine starting. The motor either can not be started at all, or it does not start well.

There is no definite answer to the question of why the chain saw won’t start. The main assembly unit of the tool is the motor. The stability of operation is affected by such conditions:

A different work unit is responsible for each factor:

  • for the combustible mixture is the carburetor;
  • for air. the cleaning system, in particular the air filter;
  • for the spark. the ignition mechanism and spark plug;
  • for lubrication. the lubrication system and the gasoline.

A common cause of chainsaws not starting is noncompliance with the starting algorithm. The motor unit should be started only after all parts are fully assembled:

the chain brake is always on. In order not to lose control of the tool, you must not start in the air.

Starting an engine when cold is done as follows:

  • The tool is placed on the ground, with the right foot on the back handle, the left hand is on the front handle.
  • The saw is in a stable condition, the chain does not touch the ground.
  • With the right hand take the starter handle, pull the cord, without wrapping it around the hand.
  • As soon as the first spark occurs, return the choke lever to the initial position by opening it and repeat the start.
  • Turn the gas on and release it. The interlock is disengaged.
  • Return the engine to idle by quickly turning off the gas restrictor.

Warm engine is started in the same sequence but without opening the choke.

If the start is correct but the engine doesn’t run, the possible reason is the lack of fuel in the tank or the carburettor fuel chamber is not filled. Check the tank and the chamber and fill them with mixture.

If the ignition system is malfunctioning, inspect the spark plug and check for a spark on the electrodes. if it is wet (the spark plug is flooded with petrol), but no spark is detected, unscrew the element, dry it out or change. If it is dry, a spark is present, the problem is in the fuel system. clogging, depressurization of the fuel intake.

Faults in a magneto are also indicated by a weak spark. Although ignition is working, there may be no flash in the cylinder, and the spark plug turned out of the cylinder is wet. Methods of treatment. purging the cylinder with the carburetor sliders open.

See ” How to Repair a Chainsaw Starter with Your Own Hands

System electrodes are covered with carbon deposits or oily. This can be eliminated with a metal brush. The candle is washed, cleaned, allowing the gasoline to evaporate.

Gap between center and side electrodes, which leads to poor starting. Normal range is 0.6 to 0.7 mm. It is adjusted by the bending method.

If the ceramic insulator that surrounds the center plug or the lead wire is damaged, it must be replaced.

If the engine starts and stops

Husqvarna chain saw starts and stops when throttle is depressed. This can be caused by clogged carburetor jets and a dirty fuel tank filter. The defect is eliminated as follows:

Another reason why a chainsaw stops is that the muffler is contaminated with exhaust gases. The problem is solved by cleaning.

Wear of piston rings affects the operation of the cylinder-piston group. if there is backlash during the inspection, the parts are replaced.

When starting the engine, the unit may also stall:

  • if there is increased dryness, clean the oil supply ducts, inspect the connection elements of the fittings to the tubes;
  • if oil leaks in the connecting points or if there are cracks on the tubes are sealed with sealant.
  • if piston rings are burnt in the grooves;
  • if the rubber seals in the crankcase are worn and lose their elasticity;
  • leaking connections between the cylinder and crankcase;
  • due to improperly set ignition advance angle;
  • As a result of contamination of the cylinder fins and fan grid;
  • If heavily loaded right after buying a new engine.

How to tune a chainsaw

In the process of repairing the Husqvarna chainsaw with their own hands, they reveal some malfunctions that appeared as a result of improper adjustment of the ignition and carburetor settings.

The mechanism is responsible for the revolutions of the motor and is adjusted for operation with the right conditions in mind:

By default the Husqvarna chain saw carburetor is factory set at the time of testing for productive operation.

The device has 3 configurable areas:

To adjust the chainsaw, after running-in perform adjustment of the carburetor: first dealing with the jig “L”, then with the idle “T” and “X” screws. When rotating “L” and “X” clockwise, the quality of the working mixture “air. fuel” deteriorates, when rotating against. enriches. Turning the “T” screw clockwise increases the idle speed.

Have your carburetor repaired by a professional.

How to Dilute Gasoline for your Husqvarna Gasoline Saw

For productive work and longer life at high power observe the proportion of oil and gasoline for chainsaws, measuring with a measuring cup the ratio of the ingredients of the fuel mixture. When making even a small amount, a small inaccuracy affects the quality of the fuel.

Gasoline of good quality with a minimum octane rating of RON 90 is used for dilution. If the parameter is less than recommended, the engine begins to knock, which leads to its overheating and increased load on the bearings. If you work constantly at high rpm choose gasoline with higher octane rating.

chainsaw malfunctions. fix it with your own hands

The chainsaw is a very useful thing in the household. After all, it quickly and relatively easily solves a lot of tasks of home construction, gardening and landscaping. A chainsaw is a rather capricious tool, but if it is used properly it is an irreplaceable helper.

The chainsaw has one weak spot: the guide bar. That is where most of the operating loads occur.

This means that knowing why tires fail more often than other chainsaw parts and how to properly replace them if necessary will help you save money and time during seasonal or project work with your tool more than once.

The chainsaw will not start

When you have trouble starting a chainsaw, many people immediately blame the carburetor. In fact, there are several options and the cause of the malfunction can be any:

  • Clogged air and/or fuel filter. Fix the problem by cleaning the filters.
  • No fuel in the tank. Yes, it happens and such a reason. some owners forget about such an insignificant detail, as a gasoline filling and think that a couple of liters of gasoline enough for six months. Besides, the fuel in the tank should not be stored for more than 14 days, i.e.к. The gasoline evaporates and loses octane number.
  • Check the hose from the fuel tank to the carburetor: it might be clogged or broken and no gasoline is getting to the tank.
  • No spark on the spark plug. Why is there no spark? There are many reasons: no contact, spark plug must be changed or plug is clogged. Why the plug on the chainsaw fills up. this is another question. But if this happens, it is necessary to dry and reinstall it, and then check for spark. If there is a lot of soot on the spark plug, it is recommended to replace it.
  • Check the muffler for carbon deposits. If there is soot. clean the muffler thoroughly, but it is still recommended to take the chainsaw to a service center to have the cylinder and piston checked there, t.к. Soot is a sure sign of improper operation of the elements of the cylinder and piston group.
  • The carburetor is clogged. How to properly adjust your chainsaw so that the carburetor works well was discussed in a separate article.

If none of the above methods has helped, it means that the reason is more serious. the failure of one of the connecting rod and piston group components. If this is the case, it is advisable to take your chain saw to a service center.

The engine stalls

The engine has started, but the chainsaw stalls at idle or under load. In this case, most often it is necessary to perform the same actions as described above.

How to adjust the chainsaw depends on exactly when the problems begin:

Chainsaw chain lubrication: system operation and troubleshooting

One of the important chainsaw systems, work without which is impossible, is the forced lubrication system of the chainsaw chain. It’s no secret that chain friction on the chain saw bar during operation causes heating and premature chain wear. In order to minimize friction, the chain chain must be regularly lubricated.

The structure of the lubrication system

Depending on the brand of a chainsaw, the details of the lubrication system may vary slightly structurally, but their total number and connection scheme remains the same.

The main components of the lubrication system, these are:

  • oil tank usually located in the engine crankcase.
  • Filter element, located in the tank.
  • Oil pipe, a small diameter hose made of oil-resistant rubber.
  • The heart of the system. the oil pump.
  • The worm gear that transmits power from the engine to the pump.
  • The chainsaw bar, it too can be considered an element of the lubrication system, as it has special holes for oil supply, by the way and the chain itself is involved in oil transportation and accordingly also has some elements designed exactly to provide lubrication.

Principle of operation

The pump is the main component of the system. The principle of its operation is as follows. As the engine rpm increases, the pinion on the main shaft drives the pump shaft through a worm gearing. In turn, the rotation of the shaft creates a certain pressure in the oil line, which causes the oil to move through it towards the tire.

The end of the oil channel is located at the contact point of the bar with the tool casing, where there is a longitudinal groove on which the oil channel falls when the bar is installed.

The bar is necessary to keep the oil flowing to the bar regardless of the tension of the chainsaw chain. to put it simply, whichever position the bar is in when working, oil will flow to the bar through the groove.

This is followed by the chain which, depending on the chain model, has either a groove or hole in the chain links that allows the oil to disperse over the bar. the oil flow rate also increases with increasing engine speed.

Some chainsaw models are equipped with pumps that are additionally adjustable and, if necessary, the oil flow can be increased or decreased by the lubrication system.

This function is quite handy, because it allows the oil to flow into the tire at a faster rate than the engine speed. к. saves and does not waste extra oil.

Lubrication system malfunctions and how to correct them

The basic chain saw oil supply system malfunctions can be divided into two basic types, those that are common to all chainsaws, and those that are individual, depending on the type of pump and worm gear installed on a particular model. Let’s start to understand the problems in order.

It is forbidden to operate the chain saw if the chain is not lubricated. This is detrimental to the tire, drive sprocket and chain, and can lead to serious repair costs.

Signs of lubrication system malfunction and how to check it

  • The chainsaw chain is dry and has a pale shade without shine.
  • The chain is stretching relatively quickly.
  • The tire is very hot and may even partially melt the paint.
  • There is practically no oil drain from the tank.
  • Cutting performance is reduced on a sharp chain

All of these signs are an indication that the lubrication process is not functioning properly.

To check oil flow in the lubrication system, remove the side bar and start the chain saw. Next, you need to increase the speed a little, watching the end of the oil line. If oil is coming in, it is probably not enough for proper lubrication and the filter should be cleaned or replaced and, if possible, the oil flow should be adjusted.

In the case where no oil is supplied, the problem is more serious and requires further diagnosis.

There is a way to check oil flow without removing the bar. It is necessary to direct the end of the guide bar to the side of, for example, a freshly cut billets from the cutting side and increase as much as possible the speed, it is necessary to try to keep the end of the guide bar not more than 10 cm from the billets. If oil stains start to appear on its surface it means that oil is being pumped.


Once it has been determined that no oil is flowing, further diagnosis is only possible if the oil system is completely removed. Of course, in some situations changing the filter helps, but this is very rare.

Access to the oil pump of some models of saws, is possible only after a complete disassembly, respectively, not having skills in the repair of gasoline tools, it is better to entrust the repair to professionals.

Most common faults

  • Broken oil hose. This can sometimes also be detected by visual inspection. Fix the problem by replacing the defective part.
  • Lack of thread on the oil pump shaft, replacing it would help.
  • Faulty thread on the pump pinion can be fixed with a new part.
  • Lack of corkscrew on the main shaft (relevant for some models of tools, e.g. Homelite).

Individual faults in the STIHL MS 180 lubrication system

Since the STIHL MS 180 is one of the most popular chain saw models, I would like to dwell on a particular characteristic fault and explain how it can be fixed without having to change parts.

On the STIHL MS 180 chain saw it is quite common to find an oil pipe leaking where the oil pipe from the oil tank is inserted in the housing of the saw. You can tell when there is characteristic grease leakage on the bottom of the tool.

To fix the problem you need to remove the chain saw handle, take the hose out of the seat hole, clean and degrease. After all these manipulations, apply sealant to the landing place of the hose and install it in the body of the chainsaw.