Setting up the chainsaw L Hotel Spa. Oil does not enter the tire

Settings of the Carburetor of the chainsaw: adjustment of different models (features)

Passing the path from the fuel tank to the combustion chamber, the combustible mixture passes the extremely important element of the system. The carburetor providing regular supply of the engine with a “nutrient” liquid has a special effect in the process of the chainsaw. Even a small failure of the miniature mechanism of this device causes pronounced deviations in the work of the entire tool, reducing the efficiency and increasing fuel consumption. In this topic, you will find out how the adjusting screws affect the system and how to achieve their optimal position.

The more fully understanding the principle of operation of the device, the easier it is to operate, maintain or repair it. The carburetor mechanism is quite multifaceted and interacts with several adjacent nodes (a crankcase, accelerator and a tank). They are driven by jerks of air swaying membranes, but more on this in due time. So far we will consider the device in general.

As befits the “heart” of the fuel system, the design of the carburetor is not simple, but is to understanding with smooth and consistent analysis. Let’s start with a general list and immediately move on to the interaction of the components. Depending on the model, the mechanism may include about 20 parts, the location of which clearly shows the following scheme of the carburetor of the chainsaw of a modern model (relevant since the 90s).

• Fuel fitting. Connects to a hose coming from a gas tank.
• The fitting of the impulse channel. It is connected to the engine card, through which the air affecting the membrane is replaced and absorbed.
• Fuel pump membrane. Performs the function of pumping fuel into the chamber and its further supply to the fuel channel.
• Inlet valve. Controls the movement of the mixture, allowing you to get into the membrane chamber, and limiting the movement back.
• Exhaust valve. In terms of functionality, it is identical with the previous part, but provides control of flowing from the membrane chamber into the fuel channel.
• Filter element. The last line of fuel cleaning from small particles. Made in the form of a shallow mesh.
• Fuel channel. Ensures the supply of the mixture to the lower part of the carburetor.
• Needle. Overlaps the fuel channel, not allowing the mixture to go back to the upper part of the mechanism. Functionally similar to valves, but has a more complex design.
• The control membrane. Affects the needle through a spring.loaded lever mechanism, changing its position depending on the amount of fuel in the chamber.
• Screw (h) high.speed adjustments. It is connected to a needle, the tip of which limits the fuel flow to the jacket of the working course and the sprayer.
• Working jet. Provides a dosed supply of the mixture for the spray.
• Screw (l) of idle speed adjustments. In structure and functionality, it is identical to the previous screw, but his needle limits the capacity of the channel to 2 other outputs.
• Inverse (left) and idle nozzles (right). Technological holes that carry out regular injection of the mixture into the mixing chamber with air.
• Air damper. Auxiliary component necessary for starting a cold engine. When working, is always in the open position.
• Throwdoy damper. Regulates the absorption of the fuel mixture into the mixing chamber. In the closed position, only 1 idle throttle throws, and when opened, he alternately activates the remaining 2.
• Diffuser. The narrowing part of the main channel of the carburetor, where the fuel mixing with air occurs. The peculiarity of the form provides an increase in the speed of the air flow.
• Fuel chamber. The place of accumulation of the fuel mixture, where it is supplied with a membrane pump, and where it is distributed, passing through the nozzles into the mixing chamber.

Having familiarized yourself with the main components of the standard design, you can proceed to their interaction and find out how the carburetor of the chainsaw is based on the sequence of fuel mixture in its channels. If difficulty with understanding, it is recommended to go with the above list and scheme.

Its high.speed route along the fuel system of the tool, the mixture begins with a gas tank, from where it is absorbed through the filter and through the hose, through the fitting, enters the fuel pump chamber, passing the intake valve. When an engine piston is raised, the air in a sealed crankcase contracts, pressing the membrane to the top cover, with which it is connected through the pulse hose (as gas is pumped). When the piston drops down, the pressure in the crankcase rises and bends the membrane in the opposite direction, directing the mixture accumulated in the chamber along the only available way, through the exhaust valve into the fuel channel.

Before being in the fuel chamber, passing along the channel of the same name, the fuel flows through the cone.shaped tip of the needle, pressed to the bandwidth with a spring. The position of the needle is controlled by the control membrane, which is drawn into the carburetor when the vacuum is formed, pushing the tip and allowing the mixture to get the camera. When filling (even partial), the vacuum weakens, and the spring presses the needle again, closing the channel.

From the fuel chamber, the mixture is directed to the nozzles, passing through technical openings, the width of which is regulated by screws (l and h). At the exit from the jet, the fuel is picked up by the air stream and sprayed into small particles. With a closed throttle, fuel is pulled out only from the last hole (idle) located closer to the engine. With a smooth click of gas trigger, the damper opens, gradually increasing the activity of a neighboring jacket (medium.sized). In the maximum position, the most extreme spray (high speed) is involved, increasing the volume of the fuel supplied and the speed of the piston, accelerating the operation of the entire system.

Tools for configuration

Like any service procedure, adjusting the chainsaws requires certain tools that allow us to conveniently and effectively interact with the mechanism. Fortunately, the basic arsenal for such an event consists of only one slotted screwdriver with a long rod. Relevant for 95% of carburetors, household, amateur and professional motorcycle.

The most accurate setting is performed using a special electronic device reading the speed of the crankshaft rotation. If you want to get the best result, it is better to purchase a budget tachometer and figure out how to measure the speed of the chainsaw in a simple and effective method. For experienced users who distinguish defects by sound, the device is not particularly useful, but beginner sawers will be able to seriously help.

Some manufacturers excessively unique their products, supplying it with elements with a non.standard structure. For example, setting up the Husqvarna 135 or Jonshed CS2238 chain carburetor, will require screwdrivers with a batter’s bat, which can be far out everywhere. This complicates the procedure for independent adjustment and forces to contact the special. service. If the carburetor of your saw has unusual screws of the screws, but you want to set up yourself, it is better to order the required tool in advance (you can find on Ali and in some online stores).

Preparation of a chainsaw for the first work

The initial stage of setting up a new saw is reduced to the installation of a saw tire, chain and gear stops (if any). It is difficult to make a mistake with the first and last detail, but when calibrating the chain, you should be more careful. First of all, the teeth should be directed in the opposite direction from the drive. The chain installed on the tire must be handed manually so that it exactly gets into the groove of the tire.

So that the rupture is not running out of the cutting problems, the chain tension should not be excessively high. The optimal tension allows you to pull the chain from the tire without force, leaving the gap between them into the thickness of the little finger. After installing and calibrating the components, you can start refueling and the first launch, as described in the details below.

Preparation of the fuel mixture

The main source of saw energy is gasoline with the value of the octane number of more than 90. In old chainsaws (friendship, Urals), without critical consequences, you can fill in AI-80, but in modern devices it is recommended to use AI-92. The operation of the engine on gasoline with a low octane number can be uneven and cause tapping. Depending on the saw model, the requirements for the fuel brand may differ, so you should always view the corresponding section of technical documentation.

The second, no less important mixture ingredient is oil for two.stroke engines. It is added to gasoline in proportions from 1/25 to 1/50 (depending on the model). For the duration of the runaway (2-4 tank), the ratio of oil to gasoline, it is recommended to increase by 20%. For example, in a ratio of 1/25, by 2.5 liters of gasoline, add not 100 ml, but 120. It is not necessary to use branded oil specified by the manufacturer. Enough lubricating mixtures of the ISO-L-EGB or JASO FB class.

By combining gas and oil, it remains to mix them (shake the bottle / canister) and pour saws into the tank. Before telling how to run the chainsaw correctly, we will go through the main aspects of the lubrication of the chain.

Oil pump refueling

The lubrication of the links of the chain is always relevant, whether it is the first launch of a chainsaw or an already debugged workflow. Many lubricants are suitable here, starting from branded (Husqvarna Bio Advanced, Champion Bar Chain Oil) and ending with classic M-8, M-10 grades. Cases of use of working are frequent, with minimal contamination missed through dense fabric. To work in the cold, lubrication must have properties that prevent strong thicken.

The lid of the oil tank is located on one side with the fuel, but is closer to the chain. Check the receipt of the lubricant on the chain, you can with a light processing of the established tool, brought by the lower part of the tire to a sheet of paper. The formed oil marking indicates the good operation of the pump.

Setting and starting engine

Having completed all the stages of assembly and gas station refueling, you can proceed to the final stage to launch the tool. First of all, you should make sure that the chain brake is unlocked (switched in the direction of the upper handle). Even short.term work of a saw with active blocking can wear a clutch.

If an external fuel pump is installed on the chainsaw, it should be pressed a couple of times. The next step we close the air supply to the air (pull on yourself). Put the chainsaw on a flat, reliable surface and turn on the ignition. We press the back handle with your foot, and hold the top with your left hand. Having fixed the tool, we take the starter lever and pull on ourselves a moderately sharp movement several times. The engine will start and immediately stall, since the valve is closed.

On this, the preparation of the chainsaw for work is completed. It remains to open the air valve and re.start the engine. Particular details are painted below, in the final part of the article.

Features of work when running

Since the main meaning of the running.in is the grinding and lubrication of parts, increased loads at this stage are extremely not recommended. Long.term retention of the tool at idle (for more than a minute), also not desirable. The optimal pace of running.in is 3 minutes of work at 60% of the power, after which an idle move is 20 seconds. At the same time, the sawn wood rock should not be very solid. It is best to start with coniferous, but the birch is quite suitable. At the time of the running.in, it is recommended to saw branches with a diameter of not more than 100 mm.

In terms of average values, the run-in the new chainsaw is performed for 3-4 full fuel tank. Some models need more time, in others less, and some even pass this stage at the manufacturer’s factory (this is also needed for a gentle regime). The above sequence of actions is considered the most common and universal, but if you want to conduct preparation as accurately as possible, it is better to familiarize yourself with the technical documentation for a specific tool.

When adjustment is required

The main signs of what the carburetor needs to be adjusted:

• saw consumes a lot of fuel,
• There are more exhausts,
• The silencer, filter and fuel highway are quickly polluted,
• The engine will not start for a long time,
• Basil often stalls.

These problems are not necessarily related to the carburetor. Therefore, before starting adjustment, check the other elements of the chainsaw.

• Fuel filter and hose. Remove dirt from the filter, make sure the integrity of the hose itself.
• Air filter. Clean the dirt, check that the filter is not torn.
• The spark plug without interruptions gives a spark, if this does not happen, replace the candle.
• The engine crankcase is sealed. When sucking in air, the revolutions grow, and it will not work to adjust them.

If, after checking and eliminating these problems, the saw continues to work with interruptions, take up the calibration of the carburetor.

How to calibrate the carburetor

Carburetor contains three calibration screws. Each of them is indicated by the letter and is responsible for adjusting the specific parameter.

For configuration, you will need a screwdriver with a flat slot. We recommend using a tachometer to accurately determine the speed, otherwise you will have to configure the saw by ear.

At the Pilas of Husqvarna and some other manufacturers, adjustment is carried out by special keys that are difficult to find in free sale. Such carburetors should be tuned only by specialists of service centers.

First of all, it is necessary to warm up the engine, setting up on a cold engine is less accurate and will require the subsequent re.distribution. Therefore, before setting, run the saw for 5-10 minutes.

Hycles L and H are regulated by the ratio of air and fuel. The turning clock increases the amount of air in the mixture (impoverishes), against. increases the amount of fuel (enriches). With a strongly impaired mixture, the saw begins to whistle during work, the rewritten will be greatly smoke.

Lining the mixture at low speeds does not allow the saw engine, on high. causes power loss.

The gikler t controls engine speed. Turning clockwise increases the speed of rotation, against it reduces. At idle, the engine should work stably, and the chain on the tire should remain motionless. If it begins to rotate, you need to reduce the speed if the engine stalls at idle. increase them.

Do not turn the screw at once more than a quarter turnover. After making changes, check the saw at idle. If everything is in order of result, test the saw in the case.

Adjustment of the chainsaw carburetor instruction

Setting up the chainsaw carburetor begins with the preparation procedure. The preparation is based on the implementation of such actions:

• Check the air and fuel filter for the presence of contaminants, and if any, you need to clean these elements
• Make sure the absence of damage to the membrane
• The health of the needle valve
• Lack of air leaks, which can occur due to the leaky oil seals, gaskets and seals

After making sure that the carburetor is working, you can adjust it yourself. You can restore the performance of the mechanism to factory settings, but it is not always necessary to do it. Instructions on how to adjust the carburetor on the stihl, Husqvarna, Makita chainsaws, Dolmar, Champion, Sadko and others, described below. Initially, we find out why each screw is intended for the device:

• Screw h is the main nozzle that is responsible for setting the maximum number of tools of the tool
• Screw l. a jackler of xx, which is needed to install low.speed.strokes
• Screw la or s or t. an increase and decrease in the amount of mixture supplies to the cylinder

It is interesting! There are mechanisms on which there are two or even one adjusting screw called LD for air supply (on the Stihl 180 and 170 chainsaws). This is done in order to simplify the process of adjusting the gasopyle carburetor unprofessional.

Each type of stihl, Husqvarna, Makita, Dolmar, Partner instrument is an instruction that has a section where this process is described in detail. It will not hurt if before setting up, you will find instructions and read it before twisting the screws.

Preparations for setting up the gasopyle carburetor include the following manipulations:

• DIY chainsaw installation on a flat surface. It is also recommended to fix the tool so that it does not move when exposed to screws on the screws
• Direct the tire away from yourself
• Ensure a safe distance for others, since adjustment of the carburetor of the chainsaw is carried out on a working engine
• It is not necessary to extract a carburetor from the unit for its configuration

The process of setting up the chainsaw mechanism:

• Warm up the engine, letting it work for 10 minutes
• Find the location of the screw l and using the screwdriver we rotate it in one and the other. Upon rotation, an increase in revolutions will be observed (the engine will work louder) and a decrease (when rotating in the other direction)
• We determine the optimal value of revolutions, which should be 1.5-2 thousand revolutions. It will be problematic to determine the newcomer by ear, so you can connect a tachometer. Details about the connection and use of the tachometer are described here
• After choosing the optimal speed value, you need to turn the screw L to 1/8 or ¼ turn (indicated in the documentation for the unit) counterclockwise, and click on the accelerator button. If the engine responds instantly and evenly, that is, it gains speed quickly, then you can continue the procedure. If the failures are found, then the speed should be reduced, and again repeat the check by the accelerator
• If after these manipulations the chain on the unit does not move, then you need to smoothly begin rotation of the screw t or s clockwise. Move the screw along the time of the clockwise you need to until the chain starts to move
• As soon as the chain begins to move along the tire, you need to twist the t or s screw back to a quarter of turn
• The chain must stop the chain. If it continues to move, then you should also twist the screw s. Ideally, the chain should not move at the idle speed of the unit
• The motor with a configured carburetor should work evenly, and when you press the gas button, the speed should increase sharply. With uneven operation of the motor, you need to repeat the settings from the screw L, checking it for 1/8 turnover counterclockwise. After that, the process of moving the screw S is repeated, on which the adjustment of the gasopyle carburetor is completed

The regulation process is not finished on this, but the tool can already be checked in action. For beginners and inexperienced sawmills, it is recommended to complete the setting process on this. For a more accurate adjustment of the carburetor of the chainsaw, you need to set up maximum speeds. We proceed to setting the screw H for experienced sawmills:

• Determine the enrichment of the mixture by exhaust. To do this, we develop the turnover to the maximum, and look at the nature of the exhaust. The presence of brutal smoke and a strong vibration of the tool indicate excessive enrichment of the mixture
• A tachometer (if it is connected) will show a large number of revolutions. more declared in the characteristics
• To reduce maximum speed, you need to move the screw h by several revolutions counterclockwise
• The maximum revolution is re.conducted, and the process is repeated again if necessary

It is interesting! You can determine the depleted mixture by such signs as screaming of the motor, its rapid heating, interruptions in ignition and detonation. It is impossible to allow the depleted mixture, since it will lead to a rapid failure of the cylinder-piston group.

Make sure that the tool is correctly configured by the following signs:

• The chain at idle does not move
• The engine works like a four.stroke motor
• When you press the gas handle, a quick response of the motor and a set of revolutions occurs

To make the most only possible setting, you will need to use the wired or wireless tachometer.

On the Stihl 170 and 180 chainsaw, the tuning process of the chainsaw carburetor looks somewhat simpler, since there is only one screw there. A detailed description of the process of regulating the carburetor on the Stihl MS180 chainsaw is shown in the video.

How to adjust the carburetor on a Chinese instrument

We will figure out how to properly adjust the carburetor on the Chinese chainsaw of different brands. The configuration principle is similar to the one that was described in the material above. First you need to inspect the tool, and identify the presence of adjusting screws. Usually screw t is located on top, and the screws l and h below. To access these screws, you do not always need to remove the protective cover or casing.

If there is a different number of screws on the Chinese chainsaw, then based on their number, you need to make an appropriate setting. The device and principle of operation of all chainsaws of different brands and manufacturers are approximately the same, therefore, problems will not arise with adjustment.

It is interesting! Electric engines are installed on the electric saws that do not need to use carburetors, so they do not need to perform settop manipulations on them.

It is always easy to do any even new job, if there is an instruction, so do not be afraid to take up the configuration. Even if you do something wrong, then turning to a specialist, he will surely indicate your mistakes. If you have difficulties with adjusting the chainsaw carburetor, then describe them in the Комментарии и мнения владельцев. Specialists, masters and just amateurs, together with the founder of the portal, will help you understand this issue.

When you need adjustment

As already mentioned, the new chainsaw already has standard fuel supply settings. But for proper running.in, it is recommended to limit the maximum engine speed, and this is done using adjusting screws located on the carburetor housing. Also, after the running.in, you will need to again make a more accurate setting of the supply of the combustible mixture.

In addition, the carburetor will have to configure in the following cases:

• Due to strong vibration, factory settings were lost;
• ICE starts poorly and stalls immediately;
• ICE starts up, but the turns does not develop, and it stalls;
• The piston group has worn out. in this case, adjusting the carburetor of the chainsaw is possible as a temporary measure;
• the engine does not function at idle;
• Increased gasoline consumption, due to which the unit gives out a lot of smoke, the muffler and the spark plug are polluted by the soil, the engine power decreases.

Rules for setting a carburetor

You should know that the carburetor can be correctly configured only if:

• Cleaning filters (gasoline and air) are not contaminated;
• nozzles and channels suitable for them are clean;
• membranes have no damage;
• The needle valve is working and the necessary volume of the fuel mixture is received in the float chamber.

To adjust the carburetor of imported chainsaws, it is necessary to adhere to the following rules.

• Before adjusting, if possible, you should warm the engine at idle or minimum speeds of about 10-15 minutes.
• The rotation of the “l” regulator is achieved by such a engine that it gives out a idle one and a half to two thousand revolutions per minute. But you should pay attention to how the engine is gaining momentum. When pressing the accelerator lever, acceleration should go quickly and evenly. If the “failure” is detected, the screw should be slightly twisted until this phenomenon is eliminated, since it is caused by insufficient enrichment of the fuel mixture.
• When the supply of the mixture at low speeds is adjusted, you should start twisting the “T” screw until you notice the rotation of the saw chain. After that, the screw should be unscrewed by half or a third of the turn, observing the behavior of the adhesion mechanism. Normally, at idle speeds the saw should not rotate.

The screw “h” is compensated by underestimated or overestimated revolutions due to replacement of the type of fuel, changes in the concentration of oil or humidity.

Also, the “upper” setting can fly when improperly adjusting low revolutions with the corresponding screw.

Screw “h”, without enough experience, it is better not to regulate. If the tuning of the gasopyle carburetor is carried out by an incompetent person, the danger of the fact that at high speeds to the combustion chamber is too impoverished, especially during load. Such an engine operation will inevitably lead to the rapid wear of its piston system and to failure in the ignition system.

You can start adjusting high speeds if a person who sets up is knowledge and skills to adjust carburetor engines. At the disposal of the master, a special device should have a special device-a tachometer or multimeter with the function of the oscilloscope.

Setting up a chainsaw carburetor, namely, high engine speeds, occurs according to a simple scheme.

• It is necessary to tighten or twist the “H” screw until the engine develops about 15 thousand revolutions per minute (according to the tachometer) or the value that is indicated in the manual to this unit on maximum gas.
• When using an oscilloscope, the spark discharge frequency should be in the range from 230 to 250 Hz. It should be borne in mind that under load the frequency can decrease by approximately 10-15%.

It can be concluded that for safety should you configure the internal combustion engine to slightly low speeds.

The carburetor of the Chinese chainsaw should be configured by the same principle, as described above. There are holes on its case, into which, in order to adjust the engine speed, you need to insert a flat screwdriver. Each hole is signed by any one letter of three. As a rule, near the upper hole you can see the letter “T”, and near the lower ones (shown by arrows). the letters “L” and “H”.

The Chinese Carver chainsaw (Carver) has the same location of the screws. The following figure shows what a carburetor looks like from a Chinese chainsaw outside the unit housing.

Carburetor device of the chainsaw

No repair event is complete without knowledge of the basics of the mechanism. Versed in the constituent elements and the principle of work, it is easier to determine the cause of the breakdown.

Any malfunction in the carburetor threatens to stop the engine

The carburetor is one of the main functional parts of the engine, which serves to prepare and supply the fuel mixture, consisting of certain proportions of fuel and air. As soon as the proportions are violated, the engine begins to “junk”, or even stops working at all.

You can achieve the correct operation of the carburetor by studying its “filling”:

• A pipe with a transverse damper to adjust the air flow.
• Diffuser. narrowing to increase air flow rate, is near the input hole of the fuel supply.
• A sprayer from which fuel comes (fuel needle in the diagram).
• A float chamber that regulates the fuel level at the entrance to the channel.

The scheme displays the interaction of fuel and air flow

The principle of operation: a stream of air in a diffuser spray fuel, creating a mixture entering the cylinder. The larger the amount of incoming fuel, the higher the engine speed. Carburetors of various models work according to the same scheme.

When you need adjustment in general?

Specifically, adjustment of the carburetor of the chainsaw is required in rare cases, more often problems arise related to fuel intake or wear of parts. But sometimes “symptoms” indicate that it is necessary to adjust the mechanism. Here are some signs:

• After the engine has started, it stalls right away. As an option. it will not start at all. The reason lies in an excess of air and fuel deficiency.
• Increasing fuel consumption, and as a result. a large amount of exhaust gases. This is due to the reverse process-oversaturation of the mixture with fuel.

The reasons for the adjustment failure can be mechanical:

• Due to severe vibration, a protective cap is damaged, as a result, all three bolts lose their established fixation.
• Due to wear of the piston part of the engine. In this case, setting up a gasopyle carburetor will help out only for a while, it is better to replace a worn part.
• Due to the blockage that occurs due to poor-quality fuel, scale or damage to the filter. The carburetor requires complete disassembly, washing and adjustment.

If the chainsaw suddenly stopped working, to clarify the reasons, it is necessary to disassemble it

Poor and rich mixtures

A little more about the “poor” and “rich” mixtures.

“Rich mixture”

The “rich” mixture is a fuel mixture in which the amount of fuel supplied to the carburetor exceeds the norm. In this case, the fuel does not have time to burn completely and less energy is produced than with an optimal ratio of fuel and air. Partially irrepressible fuel enters the muffler, then the chainsaw is greatly smoke.

“Poor mixture”

In the “poor” mixture, an excess of air, that the same is not good, since it has its cons of. Namely: insufficient energy during the outbreak (which means power loss in the end), excessive heating of the cylinder due to insufficient lubrication and high revolutions, which leads to the nozzles, and there is not far from the “jamming” of the engine.

Adjusting the gasopyle carburetor

Most chainsaws have three adjusting screws on the carburetor. In order about each:

• T.Cooper screw. The idle screw is responsible for the position of the throttle, when the gas handle is completely released. If the throttle is not open enough, then the engine will stall with a released handle since the damper will block the supply of the fuel mixture. In the event that the throttle is open to a large value, then the chain will rotate, which is strictly prohibited by safety precautions when working with a chainsaw.
• L-vint of low speed adjustment. This screw regulates the amount of fuel in the fuel mixture when the chainsaw is operating at idle. If the amount of fuel is large, then the engine will stall under load, if the fuel is not enough, then as a result. overheating of the engine, bullying, and so on.
• H-vint of high speed adjustment. Is responsible for the amount of fuel in the mixture when the chainsaw. If this adjustment is configured for a larger amount of fuel, then the engine works “unacceptable” and smokes, and if less, we get too high speeds and overheating.

Carburetor adjustment step by step

• Check the condition of the air filter. Remove it or or clean it or change it. If the air filter is clogged with mud and sawdust, the work of the chainsaw will not be normal.
• Check the condition of the muffler. It should be clean and non.attached. about cleaning the muffler here.
• Before starting to adjust the carburetor, it is worth filling the fuel tank by at least half.
• If the chainsaw is able to start, then she should let it work for a few minutes to warm up. If the adjustment is carried out “for cold”, then the mixture will be re.enriched after warming up.
• It is necessary to start adjustment by adjusting the idle speed of. It is extremely desirable to have a tachometer, then we focus on 2700 revolutions/minute. If not, then we need to find the highest speed at idle. In this case, the chain should not rotate. If it still spins (a chain of course, not the Earth), then we achieve its stop by rotation of the screw t. The sound of the chainsaw should be like when listening to the file below. https: // Benzopilatut.ru/WP-Content/Uploads/2016/01/chainsaw-on-cold.WAV
• We adjust high turnover- screw h. If we rotate it for a clock, then the turns will increase, and if you fall against the sentry. Twist it until the failures appear in the ignition. After that, turn it into about one fifth turnover. The sound of a chainsaw when working at maximum speeds should be the same as when listening to the file below. https: // Benzopilatut.ru/WP-Content/Uploads/2016/01/chainsaw-maximum turnover.WAV
• We check how the chainsaw is gaining momentum. She should type them evenly and quickly. If the revolutions grow slowly, then we turn the screw L slightly.

If you still have questions, write in the Комментарии и мнения владельцев or better in the VK group.

The engine “shoots

If during work there are extraneous sounds similar to shots, then the problem with the silencer or carburetor. How to make a chainsaw work quietly? It depends on which unit in which node is.

Shoots at the carburetor:

• Too later the ignition is that the fuel mixture does not have time to burn out in the cylinder, so a sound that looks like a small explosion is obtained.
• Donested fuel mixture. There is too little gasoline to the mixture. adjustment of the chainsaw is required, or rather nozzles, to increase the fuel supply. Why is the chainsaw he gasps itself. for the same reason.

Shoots into the silencer:

• Enriched fuel mixture. Why is the chainsaw “shooting”? There is too much gasoline and little air in the mixture, so the mixture does not completely burn out in the chamber and partially burned out in the muffler. Feast on the exhaust. a clear sign of this. It is necessary to clean the air filter or adjust the carburetor.

Fixing the brake of the quapi

The mechanism may not work due to the clogging of the space under the protective lid or the work of the brake tape. In the first case, cleaning is needed, in the second. the replacement of the part.

Many parts of the saw are subject to natural increased wear, so it is necessary to have the following details in stock: a saw chain, its guide tire, asterisk, composite anti.vibration protection.

The components of the fuel system of the chainsaw

Having made a superficial acquaintance with the system and its device, we will consider each of its elements with all the attention to the nuances. How diverse are the forms of the same details in various models of chainsaws, and how they can be installed. Detailed features of the components of the fuel system, with visual photos, then.

The tank of the chainsaw

In most models, fuel storage containers are built into the housing and are a monolithic structure with a handle. Replacing such a tank when burning or mechanical damage requires a complete recovery of gas levers and air damper (in addition to hoses). There are systems that seem to be divided at first glance (for example, on the STIHL MS 440), however, the capacity is also intended with the body, and is not sold separately from the handle.

In addition to the chainsaw case, the fuel tank can be located in the crankcase (for example, Partner 351). In this case, the replacement process in case of damage is longer and time.consuming, since it requires disconnecting almost all of the tool components, including the engine. Fortunately, such designs are not always monolith and there are tools where fuel and oil tanks can be removed (Stihl MS 180), significantly facilitating the repair.

Fuel filter

A fairly important and popular consumable that provides protection of the carburetor and engine from pollution and premature breakdown. By type of performance, there are 2 varieties of filters: in a plastic case and in a metal. Nylon (in plastic Chinese elements), felt (in all types of buildings), cortex (in plastic) and foamed polymer (in metal) can be used as a purifying material.

Regardless of the material of manufacture, each fuel filter for the chainsaw has a weighting agent, directing it into the lowest part of the tank when tilting the saw.

The highest degree of protection against small particles provides foamed polymer and cortex. The felt of felt is no less reliable, but quickly clogs. Nylon nets are categorically not suitable for such purposes, therefore, having purchased a Chinese saw with such equipment, it is better to immediately change it to one of the above. The replacement should have an identical diameter of the fitting, which can be 3.5, 4.5 and 5.5 mm.

Fuel hose

The most flexible link in the system that performs the transfer of fuel from the tank to the carburetor and primer (if any). In budget variations of execution, it is made of silicone, and is equipped with a sealant in the form of a sleeve, or does not have it at all and simply enters the hole in the tank tightly. Better quality hoses are made of dense gas.resistant rubber, and in the role of sealing contact, they have special ledges pressed to Baku on both sides.

Of course, according to the duration of the service, a special rubber fuel hose for a chainsaw withstands a longer service life before starting to dry and crack.

There is only one fuel terepine in the classic motorcycle system connected to the input fitting of the carburetor. In the presence of a manual pump (primer), the number of hoses increases to 3x, where the first plays the main role, the second connects the carburetor and primer, and the third removes excess fuel from the primer back to the tank.

Climbing valve (sapun) chainsaw

Small devices, but impressive significance for the entire fuel system. Located in the upper part of the tank and ensures the normalization of pressure, with a decrease in the volume of fuel. Of the most common, 2 types of sapunes can be distinguished: simple (cone.shaped) and selected (float). Both options are widely used, both in amateur and professional tools.

In addition to standard valves, some saw models are equipped with completely unique elements. For example, to replace the saapon with Makita EA3203S and STIHL MS 660, you will need to choose a fully identical detail.

When clogging the valve bandwidth, the air that is necessary to normalize the pressure against the background of the pumped fuel will cease to flow into the tank. Since the capacity is sealed, vacuum will begin to form in it. With each new “eaten” portion of fuel, carburetor will be increasingly difficult to pump. At this pace, the work lasts several tens of seconds until the membrane pump rises. If the instrument stalled due to the clogged cabin, then when the gas tank plug is unscrewed, air is sharply absorbed into it, normalizing pressure.

How to check the fuel filter on the chainsaw

Reducing the throughput of the main fuel supply channel causes extremely undesirable consequences expressed in reducing power or a complete stopping of the tool with increasing speed. It is these problems that can be a distinct signal of fuel filter pollution. The brighter such problems are more expressed, the more the channel is clogged.

It is not always possible to establish the need to replace during visual inspection. In appearance, the filter can be clean, but its inner part of a tamped with small particles and weighing. Determine the cause of the malfunction for sure, you can experimentally remove the filter and starting the tool without it. If the work is normalized, then the installation of a new element is required.

At enterprises where the chainsaws are operated regularly, 5 days a week, the filter is changed about once every 3 months. If in 1 day the tool burns ≈ 5 liters of fuel, then in 60 days 300. For household saws, this indicator can be divided into 2, since they are equipped with less reliable filters. As a result, in home / amateur use, replacement should be made every 150 liters or 1 time per year.