Why the chainsaw vibrates on idle. By the state in which…

Does not saw a chainsaw under load

At idle, the chainsaw works fine, and stalls under load. What could be the reason?

The simplest, sawing a thick (large in diameter) logs and the wood is dense and wet and the saw chain has not been sharpened for a long time.

The chainsaw engine is simply not enough power.

Perhaps the engine power is all right, but the carburetor is not adjusted, and possibly its tightness is broken and through the gasket it “sucks” the air.

In this case, at idle speed, the chainsaws will work as well as under a large load, with an increase in the load, it stalls.

Perhaps the problem is in the fuel filter, or the air filter is clogged tightly.

In this case, at idle, it will work unstable, and stall under a large load.

Perhaps the problem in the fuel mixture, the proportions of gasoline and oil are not withstanded.

Or the mixture has been made for a long time, for sustainable operation of the chainsaw under any load it is better to use a fresh fuel mixture.

A maximum of a month can be stored in a finished (stirred) state, it is even better to use it for 2 weeks, after manufacturing.

Perhaps gasoline was used with a smaller octane number than the manufacturer advises, for example, it should work on 95 gasoline, flooded 92.

Or there may be a problem in the candle (insufficient engine power due to the faulty candle of the chainsaw), it needs to be cleaned at least, set the gap,

Portal about construction

Electric saws are preferred for one significant reason. it is very light, and therefore convenient to work. Of course, you won’t go far into the forest. the network cable will not let go. But in use near the house (for sawing logs, woodwork, trimming trees, during construction and repair) the best tool cannot be found.

During operation, especially with frequent use, the electric saw begins to junk: it makes incomprehensible sounds, smells, does not slow down on time or does not turn on at all at all. There is nothing to be done. any technical device is not forever. And every working day shortens his life. But there are breakdowns that only a professional service will cope with (for example, the case is damaged). And there are cases when you can reanimate an electric saw with your own hands, making efforts, knowledge and skill.

We made a selection of practical advice on how to repair the saw on our own, without addressing a specialist.

Reasons why the chainsaw saws crookedly?

There are several common factors that worsen the balancing of the cutting headset of the saw and spoil the fishing line for the cutting trimmer.

• Uneven independent sharpening of cutting teeth-quite often the chainsaw saws to the side due to violation of the sequence when sharpening the saw organ. According to the instructions in the instructions, the teeth should be pointed at the same distance. In case of violation of this rule, the teeth, which were more worn, wear out faster than them. As a result, the chain is noticeably moved away from the center, leaving behind a curve of a sloppy fishing line for a cutting trimmer;

• The operation of the chain, the parameters of which do not correspond to the bus. each tire has its own characteristics, including the width of the groove. The possibility of installing the cutting body on the guide depends on it. If you install a chain with a 1.3 mm.width on a tire with a groove of 1.3 mm, then a gap of 0.2 mm will remain. It will lead to an uneven movement of the cutting headset along the saw canvas, as a result of which the chainsaws will saw crooked;
• increased wear of the cutting teeth of the chain. if the chainsaw is taken aside. then this may indicate an excessive wear of the chain. To check the cutting organ, you need to remove it from the tire and examine the plane of its contact with the guide tire. If the cutting teeth are really worn out, then the chain needs to be replaced without trying to sharpen it.

The main reason for the accelerated wear of the chain may be uneven lubrication of the saw headset. If it works with interruptions, then the chain will be lubricated in parts. As a result of the teeth, which the oil does not enter, they will heat up and wear out faster.

Why the chain is not lubricated on the chainsaw?

The main reason for this problem is a breakdown of the standard lubricant system for the installed headset. First of all, you need to check the oil pump.

By its appearance, you can determine the serviceability of the node:

• If the pump is completely filled with lubrication, then the oil flows through the hole or crack at the junction of the tube to the pump;
• If the pump is completely dry, then it is not able to pump oil from the corresponding tank;
• Cracks, large chips and other defects of the pump are also signs of the need to replace it.

In addition to the oil pump, you need to inspect the tubes on which the lubricant acts. In the case of their tear or bending, the oil will flow out or return to the tank.

In some cases, the lubricant does not enter the tire due to the scored grooves provided on its surface. They may remain small sawdust or dust, which will interfere with normal oil circulation. In such cases, the tire will need to be washed with clean gasoline and dry thoroughly.

Characteristic and possible causes of breakdown. DIY problem Eliminating the problem

Chainsaws are rather reliable and light designs. Therefore, if it is true to care for them and treating them, starting from the advice of the manufacturer, then they fail, well, very occasionally and various kinds of breakdowns are quite rapidly eliminated. But if you are faced with this situation and want to personally repair your own tool without resorting to the help of experts, then delve into the information presented below.

In fact, it is unambiguously and accurately impossible to determine the reason why the tool does not start or stall when pressing on gas, because there are quite a lot of reasons for affecting it. But we should not forget that starting from the fact that the chainsaws are armed with an ordinary two.stroke engine, such conditions as lubrication, fuel, spark and air are important for its effective performance.

As follows, the manufacture of the fuel-air consistency is specifically engaged in the carburetor, the filter makes air cleaning from dust, the sparking unit and the candle make a spark, and there is a lubricant in the gasoline.

That’s why it is necessary to search for the circumstances of this kind of breakdown in an alternate manner, starting specifically from the lungs and evenly moving to complex. And this is a fundamental factor in the correct repair, because the person who, without thinking about the analysis of the carburetor, leads it to the risk. Because such a node should be repaired or regulated directly in special workshops (read about the adjustment of the carburetor).

It is important that for the non.precise activity of the tool it is necessary to carefully attribute directly to the fuel. Since if this kind of mixture is not prepared correctly, then most chainsaws simply will not start. Therefore, not every owner will guess to look for the cause of the fuel breakdown. That is why your tool always works correctly for a mixture to use exclusively high.quality gasoline.

Basopile works at high speeds

Then high speeds then stall, but it turned out.

Pour the bio catalyst MPG Bust in Stihl

And also use only the oil made by the manufacturer of your tool. In addition, it is important to prepare such a mixture in the quantity that you definitely use in one or two weeks, but no more (see. The proportion of gasoline and oil for the chainsaw).

Since, for example, the stihl chainsaw is stalling when pressed for gas for a simple reason, namely a simple clogging of a direct sapun.

The basic setting of the carburetor

Slowly wrap the adjusting screws of the maximum and minimum revolutions (h and l) until it stops clockwise, and then by one and a half turns in the opposite direction.

First we warm the engine for 5-10 minutes (not at high speeds).

We adjust the idle stroke

Now, by turning the idle screw (t, la, s) counterclockwise set up the minimum number of revolutions in which the engine operation is stable. The chain should not move. If the engine stops at idle, then accordingly turn the idle screw clockwise. If the chain moves, turn the screw counterclockwise.

For the final of the tuning of the chain saw carburetor, we check the engine for acceleration and maximum speed.

Check acceleration

We smoothly press the accelerator and watch how quickly the engine is gaining momentum from idle to maximum power. If the engine is gaining momentum slowly, therefore it is necessary to weaken the screw L (low revolutions), turning it a little counterclockwise (not more than 1/8 turnover).

We set up the maximum speed number

As mentioned earlier, the maximum speed is tuned using the screw H, the turns increase when it is twisted clockwise, decrease when turning against the hourly.

The highest rotation speed of gasoline chain saws is in the range of 11,500. 15,000 revolutions per minute, depending on the model. Higher speed is dangerous for the engine, which will not allow it to start. Maximum turns can be determined by interruptions in the ignition. If any, turn the screw h counterclockwise.

Once again, check the chainsaw at idle

As soon as we configured the acceleration and maximum speed, we again check the operation of the engine at idle. We will understand that we adjusted the carburetor correctly if:

If at least one of these conditions is not respected, adjustment should be re.carried out (excluding the basic stage).

Checking the muffler

Do not underestimate the breakdown of this node of the chainsaw. If the muffler closes, the saw will lose power and of course it will not start. If the muffler is collapsible, then we disassemble it, conduct an inspection and remove the entire pile. In some models, the muffler will have to be unscrewed, after washing the unlimited muffler should be dried with a hairdryer.

Please note: the carcass contains carcinogens that are dangerous to human health, dry cleaning is unacceptable, since it can lead to inhalation of these harmful substances.

When we remove the silencer, the outlet of the motor is plugged with a clean rag. The reasons why the muffler might clog is:

• Using improper fuel mixture (too much oil)
• The use of improper oil (oil, not for two.stroke engines or low.quality oil)

How to diagnose malfunctions and make a chainsaw repair with your own hands

Chainsaw in the country, in a private house. a frequent phenomenon. It can be amateur, semi.professional and professional. The choice depends on the frequency and complexity of the activity. She largely simplifies work on harvesting firewood, helps to quickly put a log house. In case of breakdown in most cases, it is possible to repair a chainsaw with your own hands. The equipment failure may be associated with idle problems, the mechanism will not start or troit.

The principle of repair in all chainsaws is approximately the same. Before work, be sure to read the instructions. In this type of technique, the great complexity is not the repair itself, but the search for the focus of the breakdown.

What may be problems

All problems can be divided into two large groups:

The engine breakdown is characterized by the following:

• The equipment does not start, stalls;
• does not pump fuel in a primer;
• unstable work, swimming;
• It works at idle, during load it can swim, stall, shoot.

If the problem is in other nodes, the following phenomena are noted:

The main malfunctions of the chainsaw: Reasons

Every year, manufacturers develop equipment that is more complicated and reliable in design, but simple for operation. Chain saws. no exception. But no matter what modern functions are included in the device, it is difficult to avoid a malfunction of the chainsaw. Diagnosis of breakdowns can be carried out independently using the instructions for operation. Consider the main types of malfunctions.

Saws crookedly

We will figure out the reasons why the chainsaw saws crookedly. This is manifested during the saw under load of the trunks, when the tire gradually leads to the side. This is especially noticeable when a wide trunk is drunk by double cut, first from above, then from below. As a result, the output is an uneven sawn surface, which in some cases is unacceptable. Example. ending of bars.

• Uneven sharpening of the teeth of the saw. This is the most common reason why the device cuts obliquely. The teeth should grind at the same distance to avoid problems when sawing. The optimal output is the acquisition of a sharpening machine, which is tuned to the most worn tooth of a saw mechanism. Or contacting a workshop where there is such equipment. The result is all teeth of the same size.
• The chain or tire used is not suitable in parameters. When buying these elements, it is necessary to take into account the width of the groove. This is important not only for the correct operation of the equipment, but also for safety when cutting.
• The device’s saw set is very worn out. If the device has poorly saws, increased wear of the headset is possible. Visual inspection will indicate the problem. If the right or left side of the tire is more worn stronger, it must be changed to a new. With increased wear, it makes sense to complete a full diagnosis of a lubricant system. This is often the cause of increased wear of one of the sides of the chain.

In the case of complex repair, it is better to give equipment to a specialized workshop.

Hearing

If a new chainsaw is heated, this is due to the fact that the elements of the piston group have not yet been lost. In this case, it is necessary to carry out running.in, avoiding overheating. If the problem is associated with an already operating device, the reason may be in the late ignition. Sometimes the device overheats due to violation of the proportions of the preparation of the combustible mixture.

He is not gaining momentum

The problem is manifested when starting. Basopile does not develop speeds, works with jerks or in idle, stalls, starts with a pusher, beaten back during the factory.

• If the device does not hold idle speed, the causes can be in a filter block, a poor.quality combustible mixture, carburetor, incendiary module or deformation of motor elements at load.
• If the saw does not develop traction at full power, pay attention to the carburetor. There is a chance that the settings of the working unit are set incorrectly. Adjust Zhekeler “n” responsible for the cut at the load. To do this, set up fuel supply at high rotation speed.
• Does not drop in momentum. The problem is that the device can quickly develop speed at high speeds and not throw it away. It is necessary to check the functioning of the throttle, switching the toggle switch, the presence of a corkscrew on the val of a throttle.
• Uncontrollably gaining speed of rotation. The reasons can be in a carburetor, fuel system, connecting elements leading to a carburetor.
• The technique only works on the suction. The reason is the improper preparation of the fuel mixture, a large amount of oil.

These are the main, most common causes of malfunctioning this type.

Oil flows

Owners of chainsaws often face a problem when oil flows from under the unit. The reason lies in the damaged oil hose, which is connected to the pump.

There is no spark

Ignition problems are associated with a weak spark on a chainsaw or with its absence. When checking the spark plug, there may be a blue spark. This suggests that everything is in order. If the spark is gone, check the high.voltage cable. It may have a wire break. Another option why there is no spark, associated with the wrong gap between the ignition module and the magneto pipeline of the flywheel. The norm for this indicator is 0.2 mm.

Gasoline does not act

To find the focus of the breakdown and determining why the device does not pump gasoline, disconnect the gas pipeline from the carburetor. Try to download fuel. If it is submitted slowly, problems can be:

Adjustment of the chainsaws, repairing with your own hands of common faults

Modern chainsaws delight us with their reliability, ease of operation and the presence of many special vibration suppression systems, automatic lubrication of the chain, lightweight launch. But even such a technique fails over time, especially if you do not serve it in time and correctly. We offer to study the characteristic breakdowns of chainsaws and methods for eliminating them with your own hands.

Signs of breakdowns and independent repair of the chainsaw motor

One of the most frequent breakdowns of each chainsaw is the malfunction of its motor. Determine that the reason lies in this, is quite simple. Several signs may indicate this problem:

• The chainsaw does not start;
• The tool engine works unstable and very noisy;
• The motor manages to start, but it constantly stalls;
• The motor overheats very quickly;
• Basopile only works on the suction;
• The motor smokes strongly, and the power, while falling.

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

To avoid such errors, you should once again study the procedure for launching a chainsaw with a cold motor. The algorithm of action looks as follows:

• Lower the throttle switch to the “closed” position;
• Press the fuel to the carburetor several times several times;
• Pull the starter handle until the resistance appears;
• After I saw it and immediately stalled, translate the lever of the shutters into a position “openly”;
• Start the chainsaw again and let it work a little at idle.

If this did not help, then you will need to inspect the spark plug. If you saw a large amount of oil on it, then the part needs to be twisted and dried. After that, you will need to dry the combustion chamber, screw the candle and try to start the saw again.

The serviceability of the candle itself can be checked as follows. First you need to connect a high.voltage wire to it, put the spare part on the cylinder and pull out the starter cable. At the same time, in no case do not grab the candle with your hands. If you notice the blue spark, then the candle is completely serviceable. Screw the part to the place in the chainsaw again and repeat the launch of the motor. If this did not help, then it is a queue to check the ignition system and wires connected to the candle.

If large fuel spots are noticeable on the candle, then you need to check the tool carburetor. If a thick layer of black soil has formed on the details, then the problem can lie in the use of poor.quality motor oil. quite often this serves as the reason why the chainsaw is filled with a candle. The product needs to be replaced, and the candle is thoroughly cleaned with a needle or awl.

When checking the candle, be sure to pay attention to the distance between the electrodes. it should be from 0.5 to 0.65 mm. Very often too much distance between electrodes is the reason why there is no spark.

How to adjust the chainsaw. advice to beginners

In most service centers, the adjustment of the chainsaw is performed using special equipment. Each model has its own optimal values ​​of the angles of rotation of the screws. As a rule, chainsaws do not require frequent adjustment of carburetors. However, they may be required in certain cases:

• With a strong wear of the piston of the motor. this is what causes why the chainsaw shoots;
• When the blockage is formed inside the carburetor as a result of the use of poor.quality gasoline and the failure of the air filter. in such cases, not only adjustment will be required, but also the washing of the node;
• In case of damage to the protective cover. often this is the reason why the chainsaw is gas.

There are a number of signs directly indicating the need to adjust the carburetor:

• The engine does not work on idle or the chainsaw does not start at all. the reason lies in the poor fuel mixture;
• The fuel consumption and the volume of exhaust gases have increased sharply. this is a consequence of the oversaturation of the carburetor with a fuel mixture.

Carburetor configuration scheme may differ for different models of chainsaws. But, despite this, the general principle remains unchanged.

• L. is deciphered as “LOW” and is used to adjust low revolutions;
• H. it matters “High”, and is responsible for working at high speeds;
• T (s, la). used to adjust the idle.

Before adjusting the chainsaw, you should make sure that the cutting chain of the tool is directed in the opposite side of you. The chainsaw must be installed on a flat surface so that its chain does not touch other items.

Before adjusting the chainsaw, carefully study the procedure specified in the operating instructions. The setup of the gasopyle carburetor consists of two stages. the base, in which the engine is not edited and the final, when the chainsaw motor is heated and works. The procedure is as follows:

• Slowly wrap the screws l and h clockwise until it stops, and then turn them a half turn on the clock;
• Make the motor and leave the chainsaw for 10 minutes to work at low speeds;
• Next, proceed to the final setting. Before adjusting the idle speed of the chainsaw, you will need to turn the idle screw towards the clockwise direction until the engine speed is minimal, the engine will work steadily, and the circuit will stand in place. If the screw stalls in this position, then the screw must be turned clockwise. If the adjustment of the idle stroke on the chainsaw has led to the fact that the circuit is spinning at idle, then the screw must be turned a little counterclockwise;
• Then you need to check the chainsaw for accelerating the motor. To do this, smoothly press the gas lever. If the revolutions are gaining slowly, then you need to slightly turn the screw L countdown;
• Next, set the maximum engine speed. You can check them by the presence of failures in the ignition system. If they are, then the screw h must turn counterclockwise;
• After setting up acceleration and maximum speed, you need to check the operation of the chainsaw at idle again. The fact that you did everything correctly will be indicated by the lack of movement of the circuit at idle and the stable operation of the motor will,

Malfunctions in the cylinder-piston group

Most of them lead to the impossibility of starting the motor, as pressure drops in the cylinder. There are several options for repairing and checking the state of the cylinder-piston group (CPG).

For example, you can measure compression in the engine. For this operation, a compressometer is used, which is mounted in the candle hole. Thus, you can check the condition of the parts of the CPG.

To look at the side surface of the cylinder, it is necessary to remove the muffler and look into the opened gap. Although the review is limited, the general condition of the CPG can be seen.

To accurately assess the performance of the cylinder-piston group, you will have to completely disassemble the chainsaw engine. First disconnected from the Carter cylinder, after which the piston is pulled out. If there are chips, bullying and large scratches on it, then it must be changed.

Low compression occurs most often when the piston ring is closed and damaged. Be sure to check that there is no crops on it. In addition, it should sit freely in the groove of the piston and be pressed to the surface of the cylinder.

In general, you must always follow the purity of the chainsaw and different holes. This is the only way to avoid many breakdowns and further repair. Be sure to watch the video how to do it right.

For a more complete diagnosis, a compressometer is placed in the candle hole of the two.stroke engine of the chainsaw. With it, compression in the engine is executed with it. Based on the results of the audit, you can judge the state of the CPG, but the exact facts can only be obtained with the full disassembly of the node.

If chips or scratches are present on the piston, it is obvious that it will have to be replaced. The same applies to deformed or broken piston rings. for the normal operation of the engine, they must be completely working and clean from the carbon.

Without disassembly, check the state of CPH as follows. Remove the muffler and look in the opening window. Part of the surface of the cylinder will be visible. To obtain information about the state of the CPG, a compression in the engine is measured using a compressometer, which must be installed in the candle hole. Turning the crankshaft (you can start with a starter), measure the readings of the device. Compressometer readings should be at least 8-9 kgf/sq.cm (or 0.8-0.9 MPa).

If there is compression, you will feel how your finger sucks inside.

The cause of low compression may be hair piston rings or wear.

Checking the carburetor and signs of the need to adjust it

The fact that this settings will have to be performed by the owner of the chainsaws:

• Strong vibrations or the presence of damage to a protective cap.
• Wear of the CPG.
• Clothing carburetor.
• The inability to start the engine or its spontaneous stops after starting.
• Increase in fuel consumption and exhaust volume while the engine power drops.

The adjustment of the chainsaw carburetor is carried out in strict accordance with the instructions of the manufacturer using three special screws, which are responsible for the maximum (“m”) and minimum (“l”) revolutions, as well as the idle engine (“T”). In order to exclude the unwanted intervention of an inexperienced user in the operation of the carburetor, some manufacturers install only one idle screw.

For the basic adjustment, it is necessary to wrap the screws h and l until it stops and turn back for 1.5 turns. The finish adjustment requires the engine to be warmed up for 5-10 minutes at low speeds.

The finish calibration is performed by turning the idle screw until the minimum engine speed is reached (its work should be stable and the chain. motionless). If the engine stops at idle, the screw must be returned back, and if the saw chain is still set, you should continue to turn counterclockwise.

Calibration check is performed by test:

• Accelerations (when smoothly pressing the accelerator, the engine should quickly gain momentum to the maximum indicator).
• The maximum number of revolutions (in the presence of interruptions in the ignition, the screw h should be slightly loosened).
• Work at idle (the chain should not move, and the engine should gain speed as quickly as possible).

If the owner of the chainsaw is not familiar with the device of the carburetor and does not have the necessary tool for its calibration, you should consult a specialist. The carburetor is a very complex node, so any incorrect action can lead to irreversible consequences, for example, the complete failure of the engine.

The need to adjust the carburetor of the chainsaw arises infrequently, since adjustment is originally carried out by the manufacturer to achieve the optimal mode of operation. The adjusting screws are designed for a more accurate adjustment of the chainsaw carburetor if necessary.

When and why this need arises?

Among the reasons for the violation of fixation of the adjusting screws are the most common:

• Strong vibration or damage to a protective cap. This is rare, but still happens.
• Serious engine wear (piston). Of course, in this case, it is worth taking care of the repair of the chainsaw engine, but nevertheless, adjusting the carburetor can improve its functionality for some time.
• Blockage in a carburetor due to damage to the air filter, poor quality of gasoline or due to the formation of scale. In this case, in addition to adjusting the carburetor, it is not to avoid washing.

What signs indicate the need to adjust the carburetor of the chainsaw?

• Firstly, the engine does not start, or starts up, but immediately stalls. This most often occurs due to the impoverishment of the fuel mixture.
• Secondly, a significant increase in fuel consumption and the amount of exhaust. The exhaust indicates that the fuel does not burn completely, which means that the cause may be oversaturation of the fuel mixture.

The adjustment scheme of the chainsaw carburetor may differ slightly depending on the manufacturer (the process of adjusting the carburetor of the chainsaw of a particular brand and the model is described in detail in the operating instructions), but the general principles remain the same for all brands. The purpose of the saw adjustment is to change the quantity and quality (enrichment) of the fuel mixture supplied to the engine cylinder.

To find out how to adjust the carburetor on a chainsaw, you should learn to distinguish between three screws (some models have only one).

The screws l and h are similar only in appearance, in fact they are different

Each screw has its own letter designation:

• “L” serves to configure low revolutions;
• “H” is necessary to adjust the upper revolutions;
• “T” is needed to adjust the idle passage (only it has it for models with one screw).

There are mandatory safety requirements that must be observed when adjusting the carburetor of any chainsaw:

• Make sure the chain is directed in the opposite side of you.
• The saw should be stable on a flat surface, and its cutting part should not touch any objects.

Please note: the exact values ​​of the angle of rotation of the adjusting screws will be found in the instructions for operating specifically to your chainsaw model. Accurate following the manufacturer’s instructions will help you avoid engine damage.

The process of setting up the gasopyle carburetor consists of two stages: the base (the engine is turned off) and the final (working heated engine).

Slowly wrap the adjusting screws of the maximum and minimum revolutions (h and l) clockwise until the very stop, then turn counterclockwise 1.5 turns.

In this case, it is checked and adjustable. However, if you do not have experience in performing such work, then you should find through friends or by the announcement of a specialist who knows how to do it. Otherwise, you risk being left without a saw. A carburetor is a device consisting of many parts of a very small size, which, with inept disassembly, can simply fall out and get lost.

The main malfunctions of gasoline and electric trimmers

If you do not take into account damage associated with the bar and mowing head, the bush and electric trimmer for grass usually cause malfunctions in the engine.

Damage to gas trimmers

Typical breakdowns of a gasoline trimmer for grass, which are most often faced with the owners of this device:

• Engine breakdown;
• Problems with the carburetor;
• Fuel supply problems;
• Muffler malfunction;
• Gear breakdown;
• The starter is broken;
• Air filter problems;
• Cut the fan on the gas tank.

Defective electric trimmers for grass

Since the device of an electric mower is much easier than a trimmer for engine grass, there are little reasons for its failure.

Basically, a trimmer for grass ceases to work normally in the following cases:

• Electric cable malfunction;
• Faulty control button;
• Winding of the burned engine stator;
• Open contact on the engine.

Why does the gas trimmer not start

The reasons why the gas trimmer for the grass stopped starting can be different, so step.by.step diagnosis of the device is required.

Fuel tank (fuel quality)

Always remember this before starting the device checking the presence and quality of fuel. In this case, do not be greedy and save money, as well as “be smart” regarding the amount of oil added. Everything should be done in accordance with the instructions attached to the device, because if the piston group fails, its replacement will cost about 70% of the total cost of the trimmer for the grass. Refill, hoping that you will use it completely during work. Gasoline left in the tank after a while loses its properties and can damage the engine. Therefore, do not prepare the mixture for further use and in large quantities. If the brush does not work, try to drain the “old” fuel from the tank and fill it with a freshly prepared mixture.

Candle and candle channel

So, you changed the fuel, but nothing has changed, and the trimmer for the grass still does not start. In this case, it is necessary to check the candles channel: whether it throws the combustible mixture. Often, users transfer the air damper to the “off” position when starting and when starting the engine do not install it in the “VCL” position, after which it hardens. Further, an attempt to restart the engine leads to the fact that gasoline flows a candle of ignition, and starting becomes impossible. To diagnose and eliminate the possible problem with this site, follow the following actions:

• You need to unscrew the spark plug, wipe it well and dry. When installing the spark plug in the engine cylinder, it should be dry.
• Drain the accumulated fuel from the combustion chamber. This is done through the hole from which you unscrewed the candle.
• If there is a soot on the electrodes, it should be removed with a thin file or nail file.
• Be sure to install the gap between its electrodes before replacing the part. The gap on the spark plug should be 1 mm. You can use a coin as an probe to check the gap.
• Then collect the device, read the start instructions and try to start the engine again.

If the engine does not start, you need to check the spark. For this:

• Unscrew the candle;
• Put on it the lid of the high.voltage wire;
• Touch the metal part to the cylinder body (you can insert a pipe key to provide contact), as shown in the figure below;
• Pull the starter cord to make several engine speeds.

Usually, with each impact of the piston between the electrodes, the electrodes should slip a spark. If there is a spark, the reason why the engine does not start, you need to look in other parts of the device.

To better understand the process of checking the spark plugs, you can use this video where the test is shown by the example of the Soyuz gasoline baskets.

If there is no spark, then check the cable at the beginning, connecting the spark plug to the coil is probably the reason for this. You can call with the tester. In the case of a chain break, it is necessary to replace the high.voltage wire.

It can also lead to the disappearance of the sparking of the ignition coil (magnetopathic). The figure below shows what the coil (magnet) looks like from the gas trimmer for Patriot grass (Patriot).

Other malfunctions of chainsaws

If the diagnosis has shown that everything is in order with the engine and its systems, then the cause of the malfunction should be sought in other nodes of the chainsaw. The most common problems such as:

• the failure of the starter;
• improper operation of the lubricant system;
• incorrect operation of the backwater brake;
• wear of the saw chain and t.D.

If the cause of the tool is not visible to the naked eye, as in the case of the engine, it is necessary to perform a thorough diagnosis of malfunctions and eliminate them in accordance with the recommendations of the manufacturer and the safety regulations.

DIY chainsaw repair, video

So, how to repair the brake of the drive mechanism. It serves for emergency braking of the saw chain to avoid the injury of the operator, in our face. lumberjack. This is one of the security systems that is designed on the tool. On the “horned” analogues of the chainsaws, this system is absent as unnecessary, it is understandable. In addition to the safety of the operator itself, the brake system of the chain is used to preserve the mechanism itself when jamming. Brake breakdown rarely occurs, the causes of the malfunction are rarely maintenance of the saw, lack of cleaning, wear due to a long resource, illiterate use of the tool during sawing.

When this brake system works? Most often, the brake automatically turns on when the saw offers the object (wood) with the toe of the tire, there is, as it were, a sudden barrier, a blow. In another case, the brake of the chain is triggered when the tire clamp in the cut, and the lumberjack tries to free the chainsaws with sharp movements. The protection is triggered from an inertial strike. stopping the chain. Also (operator) lumberjack can turn on the brake of the chainsaw itself. manually using the upper lever (screen), it is also the return handle. This is necessary, as a rule, with the “vagaries” of the tool, when the chain continues to rotate without gas supply, with clutch failures or carburetor.

The principle of operation of the brake

Consider the principle of operation of the brake. The design of the mechanism is simple and unpretentious. This is a purely mechanical process. Starting, the brake system switcher is the lever already mentioned by us (screen), which is a strong element on the upper front surface of the chainsaw above the silencer. The screen is just located behind the operator’s hand, almost closely, it is connected to the lid. But, since we turn the tool when working, the screen may not be on hand.

Sliding lever without a spring in a cocked state

Sliding lever without a spring in the released condition of the trigger

The sliding lever without a spring with a released turmeric is fixed by a return spring at the base of the mount and the trigger switch. When impact, tire rebound, the screen hurts, drips in the hand of the sawman and then along the chain it includes a trigger that is interconnected with the screen. In the usual position, the trigger compresses the spring (not to be confused with the return spring), and when triggered, it exacers it and fixes it with a locking latch (latch). The sliding lever that is located inside the spring, in turn, pulls the metal tape. The metal tape is located around the clutch basket (clutch drum), it delays (clamps) the drum that stops rotating. The chain of the chainsaw stops.

Insert the screwdriver into a spring with a sliding lever

Put the spring with your palm so that it does not jump out.

Insert the spring with a screwdriver into the seat

We take the brake trigger trigger with a balloon key to weaken the metal bracket

But the brake may not turn on from mediocre pressing on the screen. In the lower part of the screen (at the place of attachment with the lid), in the body of the lever, the inertial cargo is “introduced”, which drives the trigger due to a sharp return. Due to the inertial weight, an automatic braking process occurs. The focus of the forest, for example, when the tree turns, holds the saw in an inclined (lying) position and, the screen, in this case, is not on hand, but to the side. In case of return to the resume, thanks to inertial cargo, the brake system also turns on.

When and how a malfunction of the brake system of the chainsaw arises?

As a rule, a metal ribbon breaks down, tightening the drum, as it is also called a clamp bracket. It either completely breaks, grinds, or one of its stripes (in the case of a through tape). This happens from the wear of the bracket, which, in turn, arises for natural reasons (the developed resource), as well as from the illiterate operation of the user of the chainsaw.

What does illiterate operation mean? Most likely, this can be called an inattention of a sawmill. Those who first begin to work with imported saws equipped with a brake system, as well as their analogues, do not notice when operating the tool when the brake turns on. For example, when trying to extract a clamped cut in a tree. The brake system works from sharp manipulations, but the inexperienced saw owner does not notice this. Having freed the saw “from the capt”, the lumberjack is faced with a surprise. there is no rotation of the chain when gas supply. Not understanding why the chain does not rotate, it desperately begins to turn the chain, instructing and “fidering” the tire of the foam or about the log. about any subject. Some “comrades” even remove the lid from the clutch, tear it out, although the metal tape clamps the clutch basket. Then they are not at the least inspected and even somehow manage to stick the lid back. Of course, the bracket already has a defect from this. In addition, it is not clear how, but these users of the saw manage to “excite” the tool and even saw. In this case, not only the clamping bracket is covered, but also the clutch itself. it burns out and has a characteristic blue color. Repairmen in the services often say and show a duffed tape and a drum with a characteristic groove and a beam, claiming that the owner of the saw operated the tool on the brake turned on!