How many revolutions does a chainsaw have

Table of Contents:

A chainsaw is a technically sophisticated tool that needs to be serviced from time to time. Cleaning, replacing filters and, of course, adjusting the carburetor of the chainsaw will help to serve the entire life set for it. In this article, we will consider the issue of carb settings. How and why it is carried out.

Situations in which adjustment is necessary

New chainsaws are supplied from the manufacturer with adjusted carburetors. This is called standard adjustment. But for the normal passage of the running-in process, it is necessary to lower the maximum engine speed, to adjust the carburetor. After running in, the chainsaw needs to be fine-tuned to achieve maximum engine efficiency.

Also, a signal for cleaning and adjustment is increased fuel consumption, which negatively affects the operation of the exhaust system. Simply put, the chainsaw begins to smoke very much and the muffler becomes clogged with carbon, which in turn will lead to a decrease in power. With a lack of fuel in the mixture, engine parts are poorly lubricated, and premature wear occurs. Also, a poor-quality mixture can cause the engine to jam due to overheating (this is one of the reasons why the chainsaw does not start).

Adjustment is necessary when the engine does not keep idle, stalls or does not develop full power.

The carburettor must be adjusted with clean air and fuel filters.

Tools

Correct adjustment of the carburetor of the chainsaw should be carried out using a special tool. a tachometer. It allows you to most accurately determine the maximum number of engine revolutions and adjust them according to the requirements of the manufacturer. To adjust, you need to have a small slotted screwdriver. For some models of chainsaws, you will need a special adjustment key, without which it is impossible to carry out work.

The key for adjusting some carburetor models is available only at service centers authorized by the manufacturer for the repair of chainsaws. This measure is aimed at reducing damage due to improper settings by inexperienced users and those who are engaged in repair, without having official permission to do so.

Setting up the chainsaw should, if possible, be carried out in official service centers that have a certificate from the manufacturer.

How to adjust the carburetor

The algorithm for setting up the chainsaw is quite simple and consists of the following steps:

  1. Adjustment of the engine for smooth operation at low speeds.
  2. Setting the carburetor for the correct flow of the fuel mixture at maximum speed.
  3. Fine carburetor adjustment for idling.
  4. Checking the chainsaw in all modes.

The carburetor must be adjusted after the engine has run a little and warmed up.

Now we will consider how the correct adjustment of the carburetor of the chainsaw goes in more detail. Almost all carburetor models have three adjusting screws. The screw (T) is responsible for fine tuning in idle mode. Screw (H) setting for maximum speed. The screw (L) controls the formation of the mixture at low speeds. By tightening the screws (L) and (H), the fuel supply and the mixture are leaner, respectively, revolutions increase.

Process description

If the carburetor of the chainsaw is not adjusted, and it is not possible to start the chainsaw, then the setting is started by setting the screws (L) and (H) to the standard setting. This is a 1/5 turn of the screws until fully tightened. After which, it is necessary to start the engine, let it run for a bit and warm up. The next step is setting the low speed mode. Optimum engine operation at the “bottom” can be achieved by adjusting the screw (L) and idle speed (T). To do this, first screw (L) is tightened until the maximum engine speed is obtained, then it is released by 1/4, and the screw idle is normalized by screw (T).

After adjusting the work on the "bottoms" is the adjustment of traction and maximum engine speed. To do this, slowly tighten the screw (H) and check the speed using the electronic tachometer.

exceeding the maximum engine speed declared by the manufacturer is unacceptable.

An important step is to check the saw in all operating modes after adjusting it, for this you need to allow the chainsaw to cool, and then start according to the cold tool start algorithm. If the saw starts up normally and is idling smoothly, you need to check how it saws. If in the process of checking deficiencies in the power of the chainsaw are found, it is necessary to repeat the adjustment of the screw (H) by unscrewing it and checking the traction in operation.

loss of traction at maximum speeds recommended by the manufacturer is an indicator of CPG wear or poor fuel quality.

Carburetor adjustment for Chinese chainsaw

Carburetors mounted on Chinese-made saws are made similarly to European ones and have the same tuning screws.

The carburetor of the Chinese chainsaw is adjusted according to the algorithm presented above, and is distinguished by the fact that during the initial adjustment of the screws (L) and (H) they must be turned out two turns. Further, the carburetors of the Chinese saw are regulated in the same way as the European ones.

Video

The setting of the carburetor of the saw can be studied in the video below. In this video, the wizard shows how the step-by-step adjustment of a Chinese-made chainsaw is performed without using a tachometer. Carries out after adjustment check in various modes.

Adjusting the carburetor of the chainsaw, although it seems a fairly simple process, but requires a very careful and responsible approach. The article describes the process in sufficient detail, however, if you have never regulated a chainsaw, you should turn to specialists, this will save time, nerves and money.

Chainsaw device Calm MS 180. model components

The design of the Stihl MS 180 chainsaw is quite difficult to call simple. this is due to the features of this model. The Calm 180 chainsaw device consists of the following components:

  • Guide bar Ematic;
  • Oilomatic proprietary saw chain;
  • Air filter;
  • Throttle;
  • Lever for cold and hot start;
  • Control lever;
  • Spark plug;
  • Handle with proprietary vibration reduction system,
  • Powerful engine with increased working life.

The manufacturer took into account the possibility of regular operation of the chainsaw at low temperatures, which resulted in the presence of a proprietary system for a smoother and faster engine start.

Chainsaw Calm MS 180. specifications

In terms of performance, the Stihl MS 180 chainsaw is in many ways superior to its price category counterparts. This tool, as well as its modification. the Shtil 180 C chainsaw, has the following technical characteristics:

  • Power. 2 liters. with.;
  • The working volume of the cylinder is 31.8 cm3;
  • Fuel consumption. 0.7 l / h;
  • Fuel tank capacity. 250 ml;
  • The volume of the tank for oil supply is 145 ml;
  • Idling speed. 2800 rpm;
  • Launch. manual;
  • Chain lubrication. automatic;
  • The length of tires used is 30–35 cm;
  • Chain Step. 3 / 8’’v
  • Working weight. 4.2 kg.

Chainsaw Calm MS 180 does not require special care. The only thing that is needed from the owner is to use high-quality fuel and top up the oil on time. The diameter of the file for sharpening the Stihl MS 180 chainsaw chain should be 4.5–5 mm.

Features of operation of the Stihl MS 180 chainsaw

This model of a chainsaw, as well as its modification. chainsaws Calm MS 180 C BE, is not difficult to use. Below we will study the basic rules of operation, which will protect the main parts and mechanisms of the chainsaw from premature wear.

How to breed gasoline for the Calm 180 chainsaw?

The chainsaw motor should run on a properly prepared mixture of gasoline and oil. The higher the quality of these two components, the longer your garden tool will last. Of great importance is also the proportion of oil and gasoline.

The Stihl MS 180 chainsaw instruction manual clearly indicates that the ratio of oil to gasoline must be 1:50.

How to start a chainsaw Calm 180?

The correct order for starting the chainsaw is as follows:

  1. Before you start the saw, you need to activate the chain brake. To do this, the brake lever must be tilted forward;
  2. Next, you need to remove the protective cover;
  3. Next, you need to click on the decompression valve. this will greatly facilitate the starting of the motor;
  4. After that, press the fuel pump several times. This will reduce fuel consumption directly when starting the saw engine;
  5. Then set the throttle combination lever down to the “cold start” position. To do this, you first need to activate the gas lever;
  6. Slowly pull the cable until you feel resistance. After that, quickly pull the cable toward you until you hear that the engine has started and stalled;
  7. Then move the combination lever one position up;
  8. Pull the cable again until the motor starts;
  9. As soon as the engine starts, press the trigger, and, having moved the combined lever to the up position all the way, release it;
  10. Release the chain brake lever, pulling it towards you until a characteristic click is heard;

It is worth noting that all the above steps must be performed every time you start a chainsaw with a cold engine.

How to break in a new Calm 180 chainsaw?

Starting to use the Stihl MS 180 chainsaw, most tool owners do not know how to run around a purchased saw. To do this, proceed in the following order:

  1. Check for chain oil. to do this, put the saw on an old newspaper and start the tool. If there is oil, then traces of it will appear on paper;
  2. Next, turn off the inertia brake;
  3. After that, start the chainsaw and leave it to idle for 20 minutes. over, every minute you need to make short-term pulls on the trigger of gas;
  4. After 20 minutes, start sawing thin branches, gradually increasing the density and diameter of the wood.

Having completed all of these steps, you will correctly run a new chainsaw.

READ  Stihl Chainsaw Carburetor Adjustment

Chainsaw Calm 180. malfunctions and repair

In the case of the Stihl MS 180 chainsaw, malfunctions and methods for their elimination may be different. In order to be able to independently fix the breakdown of the Stihl MS 180 chainsaw, we will study the most common causes of breakdowns and methods for eliminating them on our own.

Chainsaw will not start. causes and repair

If you notice that your saw has stopped starting up, this may indicate that engine oil is filling up the tool’s candle. To inspect the candle, you need to remove the rubber cap on the body and unscrew the part with a candle wrench. If you saw large spots of oil on the candle, it means that the cause of the breakdown lies in this.

If the saw does not develop speed, then the first thing to do is wipe and dry the chainsaw candle. You will also need to dry the chamber in which the candle was located. The next step is to replace the oil pump from which the engine oil flows. To do this, remove the saw body and unscrew the screws holding the rubber primer. After that, the upper part of the pump is removed.

Stihl MS 180 chainsaw stalls idling

The most common reason for this is improper adjustment of the saw carburetor. If the saw does not keep idle, then you will need to re-configure the tool assembly. To do this, take the adjustment key from the saw set and insert it into the screw “” on the tool handle. During this, slowly turn the screw clockwise until the saw starts to work normally.

Gasoline not supplied. an independent solution to the problem

The reason for this lies in the malfunction of the carburetor. In order to repair the unit, it will need to be dismantled. However, before disassembling the carburetor on the Calm 180 chainsaw, be sure to disconnect the throttle link and ignition wire from it. Further actions are as follows:

  1. The carburetor device is attached to the saw structure with 4 screws. Unscrew them and pull out the assembly from the chainsaw. Before removing the carburetor, do not forget to wear gloves so as not to get your hands dirty with oil;
  2. Before you clean the carburetor, you will need to apply a household degreaser to its walls. Wait 5 minutes and start wiping the walls of the assembly;

After cleaning the carburetor, you need to re-configure the ignition of the chainsaw. You can find out how to set the ignition on how to set the ignition. If you have lost the instruction and do not know how to adjust the ignition, then proceed in this order:

  1. Remove the starter cover and remove the 4 screws;
  2. Inspect spark forming parts. If they are clean, make sure that the gap between the magnets and the flywheel is correctly set. A gap of 0.4 mm will be considered optimal.

In order not to resort to regular carburetor repairs, try to use high-quality fuel and oil from trusted manufacturers.

Chainsaw starts poorly. looking for reasons

If your saw does not start up cold, then the first thing to do is to inspect the pistons of the tool. The piston group of the Stihl MS 180 saw is highly reliable, however, due to lack of engine oil or mechanical shock, an immediate replacement piston may be required. Before changing the piston, we recommend that you study the specified algorithm:

  1. Remove the top cover of the saw and unscrew the candle;
  2. Remove the stoppers from the shock absorbers, the drive sprocket and starter;
  3. Then the flywheel, the worm drive and the winning chain are removed;
  4. Then remove the ignition coil and muffler;
  5. At the end, the piston group of the chainsaw is dismantled.

After that, carefully inspect the unit and the space below it. If necessary, clean contaminated surfaces and install a new piston group.

No oil is supplied to the chainsaw chain

If you notice this malfunction, then the first thing to do is set up the oil supply. The oil supply to the circuit is adjusted as follows:

  1. Locate the adjustment screw at the bottom of the chainsaw next to the sprocket;
  2. To increase the oil supply, the screw must be turned to the side "";

After that, put the saw on the paper and wind it. If you did everything right, a drop of oil will appear on paper.

Starter Cord Replacement

If you pull the cable too hard, sooner or later you will have to replace it. This is easy enough to do. To do this, proceed in the following order:

  1. Remove the 4 screws holding the flywheel with the cord;
  2. Remove the cover and pull out the torn cable;
  3. Install the new flywheel with the cable and screw the screws back in.

After this, do not pull the cable a few times until you feel resistance.

Adjust the carburetor chainsaw

The use of a chainsaw greatly simplifies the life of even amateurs, and in some professions it is almost indispensable. But, like any relatively sophisticated equipment, a chainsaw needs regular maintenance. If it is not performed on time or poorly, then this leads to various malfunctions. One of the most common causes of malfunctions is the incorrect setting of the carburetor of the chainsaw, which stray due to the displacement of the adjusting screws under the influence of vibrations or as a result of unsuccessful attempts to regulate it.

Chainsaw Adjustment required in the following cases:

  • factory settings carburetor chainsaws knocked down;
  • the engine starts with a strain and stalls almost instantly;
  • particles of garbage getting into the fuel distribution mechanism due to a malfunction of the air purification system;
  • the exhaust is too thick, the fuel consumption is too large, the fuel does not burn completely in the cylinder;
  • significant wear of the piston group (in this case chainsaw carburetor adjustment is a temporary measure).

The carburetor is designed to prepare the fuel mixture for supply to the engine. Violations of the proportions in the fuel mixture lead to malfunctions in the engine.

The design of carburetors in different models of chainsaws differs, but they all operate on the same principle. The flow of air quickly moves through the channel. Its speed is controlled by a damper that blocks the channel. The fuel supplied to the channel through the atomizer is mixed with air, after which the resulting air-fuel mixture enters the motor.

A carburetor always consists of the same set of parts, although it may vary slightly depending on the manufacturer. It consists of the following parts:

  • The basis. It is a special tube that resembles the aerodynamic design. A stream of air passes through it. In the middle of the tube in the transverse direction there is a shutter, the position of which can be changed. The more it is pushed into the aisle, the less air gets into the motor.
  • Diffuser. This is the narrowed part of the pipe. With its help, an increase in the speed of the air flow is provided in the part from which the fuel is supplied.
  • Float chamber. This element is shaped like a tank. It is used to continuously maintain the optimum fuel level before entering the channel from which air is supplied.
  • Channels for fuel. The fuel mixture is located in the float chamber, from where it enters the nozzle, and then is fed to the atomizer.

In order for the tool to function efficiently and evenly, the maximum return and fuel consumption are economical, timely chainsaw carburetor adjustment. Before performing it, check the cleanliness of the air and fuel filters. For most of the chainsaws, adjustment is made using three screws: high speed, low speed, idle.

Adjustment of the carburetor should be done with the utmost accuracy, since errors are fraught with very significant consequences, up to the failure of the motor.

Signs of the correct settings are as follows:

  • motor acceleration is quick and smooth;
  • the chain remains motionless at idle;
  • the engine makes an even sound during operation, reminiscent of the sound of a four-stroke unit.

Carburetor adjustment for Chinese chainsaw It is produced in the same way as the models produced by European manufacturers, in fact, the Chinese counterparts are copies of famous brand tools, but with some changes.

Video: How many revolutions does a chainsaw have


To do this, the same screws H, L and T are used. The standard for the carburetors of Chinese chainsaws is the position of the screw L, at which it is weakened by half a turn compared to the fully clamped state. For screw H, the standard is one revolution from the same position. Idle adjustment is carried out on a warm engine.

On some models, only idle is regulated. Nevertheless, the owners of Chinese chainsaws and service employees talk about the increased complexity of adjusting the carburetor for tools produced by Chinese manufacturers. Even experienced craftsmen adjust chinese chainsaw takes a little more time, unlike the original tools.

Chainsaw speed setting

For those who have chainsaw, do-it-yourself carburetor adjustment not particularly difficult. To do this, you need to study the carburetor device and remember the sequence of actions performed to regulate the elements on which the correct operation of the parts of the carburetor itself and the elements located near it depends.

Before adjusting chainsaw carburetor, need to prepare the device. To this end, the following actions are performed:

  • The engine is warming up, for which it starts about ten minutes before the start of repair work, and turns off after they start.
  • Checking and flushing the air filter.
  • The chain is stopped by turning the screw T as far as it will go.

To ensure the safety of repair work, it is necessary to prepare a flat surface so that the tool can be placed on it neatly and the chain deployed in the opposite direction. A tachometer will be required to determine abnormalities in the functioning of the carburetor.

Anyone who wants to know how to adjust the carburetor on a chainsaw, it must be borne in mind that this procedure consists of two main stages. The first is carried out with the engine turned on, the second. after warming up the motor.

To successfully regulate the carburetor, you should first study the instructions for using a specific model of a chainsaw to clarify the additional nuances of adjusting this equipment.

At the first stage, the low and high speed screws are rotated clockwise to the stop, and then they are turned in the opposite direction by one and a half turns and stored in this position.

In the second stage, the motor is switched to medium speed for warming up for ten minutes. The screw for adjusting idle speed must be moved clockwise. It can only be released when the motor enters stable operation. It should be ensured that during this process the chain remains stationary.

When the engine is idling, it may stall. In such a situation, immediately turn the screw clockwise until it stops. In some cases, chain displacement occurs. In such situations, turn the screw counterclockwise.

When resolving the issue, how to adjust the chainsaw, it is necessary to check the functioning of the motor during the execution of maximum revolutions. With the proper functioning of the motor after pressing the accelerator, the speed increases rapidly to fifteen thousand revolutions per minute.

READ  What Chain To Put On A Chainsaw

In the absence of such a reaction or an excessively slow increase in speed, it is necessary to turn the screw marked L counterclockwise. It is important to ensure moderate movement, since the rotation should not be more than one eighth of a 360 degree rotation.

The maximum number of revolutions is limited by using the adjusting screw marked with the letter H. To reduce the number of revolutions, it is necessary to rotate it counterclockwise, and to increase it, in the opposite direction. The maximum frequency should not be more than fifteen thousand revolutions per minute. When turning this screw, ignition processes should be considered. If even subtle failures occur, the maximum speed must be reduced.

How to set up a carburetor on a chainsaw, for it to function correctly at idle? To do this, ensure the following conditions are met:

  • The chain remains stationary at idle.
  • The sound made by the motor resembles the sound of a four-stroke unit.
  • The motor increases speed at an accelerated pace, even with a slight pressure on the accelerator. With a smooth increase in pressure, the motor speed increases proportionally, reaching the maximum permissible level.

If inconsistencies are found to these conditions, it is necessary to repeat the main configuration step.

To set up correctly carburetor chinese chainsaw, remember its factory settings, and then turn on the motor. In order to precisely set your parameters, in the future you will have to keep it in working condition for several hours. In some cases, this problem can be solved immediately after a ten-minute operation of the motor, but many models of Chinese manufacturers need special treatment.

Setup is performed in the following order:

  • Regulation starts at idle. It is necessary to achieve a smooth increase in the engine speed using the adjusting screws, so first you need to leave it in working condition for some time at low speeds. The movement of the chain along the bus represents a deviation from the norm. In this case, you should achieve an optimal position by adjusting using the extreme screws so that the chain does not move.
  • The transition to medium speed revolutions. In some cases, this is accompanied by smoke from the motor. This defect is eliminated by tightening the screw for a less saturated fuel mixture. However, the engine speed will increase. It is necessary to change the settings until the motor starts to increase the speed smoothly when the throttle is pressed, without interruptions or sudden jerks.
  • Checking the chainsaw motor. The tool is transferred to minimum revolutions, after which a quick press on the lever and its hold at maximum pressure for three seconds. If there is a malfunction in the functioning of the motor, the screw should be loosened gradually until an optimal position is reached.
  • The saw should work in real conditions for some time. To do this, you need to saw wood, and then inspect all the details involved in this process. If there are deviations, they must be corrected with the help of adjusting devices. After eliminating all the defects and setting the optimal settings for supplying the fuel mixture, the setup procedure is completed.

About carburetor design

The carburetor is used to mix a combustible consistency with air, subject to well-established proportions. If clear doses are not respected, the health of the motor is at risk. When a huge amount of air enters during the mixing of the component, and there is not enough fuel, such a mixture is considered "poor."

It should not be allowed and oversaturation, because with a large amount of fuel in comparison with air, malfunctions or deterioration of the motor are also likely. Adjusting the carburetor is necessary not only before the initial implementation, but also when any differences in its work are revealed. Before you start working with a chainsaw, do not forget to run it in.

Carburetor parts

The carburetor design contains a standard set of parts, but may vary slightly depending on the manufacturer. Components:

  1. The basis. This is a special tube that visually resembles an aerodynamic design. Air passes through it. In the transverse direction, a shutter is located in the middle of the pipe. Its position can be changed. The more it is pushed into the passage, the less air enters the engine.
  2. Diffuser. This is the lent part of the tube. With its help, the air supply rate increases in the very segment where the fuel comes from.
  3. Channels to supply fuel. The fuel mixture is contained in the float chamber, then passes into the nozzle, from which flows into the spray.
  4. Float chamber. It is a separate structural element that resembles the shape of a tank. Designed to constantly maintain an optimal level of fuel fluid before entering the channel from where air comes.

Not sure which chainsaw to choose? Read our article.

Looking for cheaper models, but reliable and time-tested? Pay attention to Russian-made chainsaws.

Or explore foreign chainsaw manufacturers such as Calm.

What you need to have to configure

Each carburetor owner must have the necessary tools to adjust this system. There are three adjusting screws that are located on the device. They have their own markings:

  • L. screw for low speed correction.
  • H. screw for adjusting high revs.
  • T. regulates idling, in most cases it is used for experiments.

Chainsaw Air Filter

Before adjusting the carburetor, you need to prepare the device:

  1. The engine warms up, that is, it starts about 10 minutes before repair, and turns off when work starts (see how to start a chainsaw).
  2. The air filter is checked and flushed.
  3. The chain is stopped by turning the T screw all the way (see chain oil).

To carry out safe repairs, you need to prepare a flat surface where you can neatly position the device and unscrew the chain in the opposite direction. Need a tachometer. It determines the presence of a malfunction in the carburetor. At revolutions of the screws, the sound should be perfect and absolutely even. If screeching notes are noticed, then the mixture is oversaturated.

Setup Instructions

Carburettor adjustment is divided into two main stages. The first is called basic. It is made with the engine turned on. The second is performed when the engine is warm.

To carry out the carb adjustment procedure successfully, you need to familiarize yourself with the instruction manual specific model to identify additional features of the device settings.

First stage

The adjusting screws of the highest and lowest revolutions should be carried out clockwise until the highest resistance is encountered. When the screws reach the stop, you need to translate them in the opposite direction and leave after passing 1.5 turns.

Main stage

STIHL 180 chainsaw checking how many turns

In this video we will answer the question of how to adjust or adjust the carburetor chainsaws do it yourself

STIHL 230 chainsaw checking how many turns

Carb adjustment chainsaws Champion 254 do it yourself. Shows initial carb adjustment

The engine starts at medium speed and it warms up like this for about 10 minutes. The idle adjustment screw must be clockwise. It is released only when the engine comes into stable operation. It must be ensured that the chain does not move during this process.

In idle mode, the engine may stall (the reason is here). In this case, immediately adjust the adjusting screw clockwise to the stop. Sometimes the chain begins to move. In this case, turn the adjusting screw in the opposite direction.

Acceleration Test

You need to do a little research. The acceleration of the device is initiated. It is necessary to evaluate the serviceability of the engine during the maximum speed. When the engine is functioning properly, it means when you click on the accelerator, the speed quickly rises to 15,000 rpm.

If this does not happen or the speed increase is too slow, you must use the screw marked with the letter L. It turns counterclockwise. It is necessary to observe moderate movements, since the turn cannot be more than 1/8 of the full circle.

Maximum speed

To limit this figure, you need to use a screw marked H. To increase the number of revolutions, turn it clockwise, and to decrease it in the opposite direction. The maximum frequency must not exceed 15,000 rpm.

If you make this figure more, the engine of the device will run to wear, which will lead to problems in the ignition system. When rotating this screw, the ignition processes of the device must be taken into account. If the slightest glitches appear, then the maximum value of the revolutions must be reduced.

Final idle check

Before this procedure, it is necessary to perform a full adjustment of the components of the carburetor when operating at maximum speed. Next, you should check the operation of the device in idle cold mode. When the correct parameters are reached during adjustment, you can see the exact compliance of the carburetor design with the following criteria:

    1. When the idle cold mode is connected, the circuit does not move.

    Chainsaw Accelerator

    1. When even a slight pressure on the accelerator is carried out, the engine accelerates at an accelerated pace. With a gradual increase in pressure, you can notice that the engine speed is proportionally increasing, reaching the maximum allowable values.
    2. When the engine is running, you can compare its sound with a four-stroke device.

    If abnormalities are noted in the given parameters or the device was not fully adjusted, you need to perform the main setup step again. Sometimes actions are performed incorrectly. In this case, the device may fail due to the loss of the correct node settings. In this case, you will have to contact a specialist.

    Dismantling the carburetor if necessary to check or repair the components

    The device of different models of carburetors is almost the same, therefore, when working with them, you can use the standard scheme. All items must be removed carefully and then lay out in the order below, so that you can successfully arrange the objects in place at the end of the repair work.

    Top cover removal

    1. The top cover is removed. To do this, unscrew the 3 bolts holding it in a circle.
    2. Foam is also removed, as it is the upper part of the filter that conducts air.
    3. The fuel hose is removed.
    4. The drive rod is displayed immediately on it.
    5. The cable tip is disconnected.
    6. The gas hose can be completely removed by steadily pulling it off the fitting.

    To finally prepare the carburetor for a major overhaul or replacement of the smallest parts, you need to carefully disconnect it from the main system. Sometimes it requires further disassembly. Unscrew the components carefully and fold the fasteners in groups, as these small parts are easily lost.

    Instruction for chinese

    To correctly configure the carburetor of a Chinese chainsaw, you must first remember the factory settings of the device, then turn on the engine. In the future, you will have to leave it to work for several hours to accurately set your own parameters. Sometimes work is performed once after a ten-minute operation of the engine, however, many Chinese-made models require special handling.

    Chinese model of chainsaw

    Adjustment Procedure:

    1. Events start at idle. Using the adjusting screws, you need to achieve a systematic set of revolutions by the engine, so you should first let it work at low speeds. A deviation from the norm is the movement of the chain along the bus. In this case, it is necessary to adjust the extreme position of the extreme screws so that the chain remains stationary.
    2. Switching to medium speed revs. Sometimes the engine smokes at the same time. This defect can be eliminated by tightening the screw to supply a leaner fuel mixture.
    READ  Chainsaw Stihl Ms 180 Consumption

    In this case, the smoke will disappear, but the engine speed will increase. It is necessary to adjust the settings to the level where, when you press the throttle, the engine gains speed smoothly, sharp jerks or interruptions are not heard.

  1. Device engine check in progress. The chainsaw is transferred to the minimum speed, and then a rapid pressing of the lever is carried out. With maximum pressure, it is held for 3 seconds. If there is a malfunction in the engine, it is necessary to gradually loosen the screw until the optimum position is reached.
  2. Chainsaw should work for several hours in real conditions. It is necessary to engage in sawing wood, and then perform an inspection of all the elements involved in this event. If there are deviations, they need to be corrected using adjusting devices. When all defects have been eliminated and optimal settings have been set for the supply of correctly concentrated fuel, the process of setting up the device can be considered completed.
  3. Look at the video clearly:

    Conclusion

    In order for the chainsaw to work properly, it is necessary to carefully carry out work on adjusting the carburetor in exact accordance with their priority. If there are any violations in the operation of the device, you must independently perform its complete disassembly. In most cases, replacement of any parts that have become unusable is required.

    With a constant check of the quality of the carburetor settings and the implementation of timely actions to improve its operation, there are no problems with the chainsaw.

    About which chainsaw to choose. read here.

    About carburetor design

    The carburetor is used to mix the combustible mixture with air in compliance with predetermined proportions. If the exact doses are not respected, the health of the engine is at risk. When a large amount of air enters during mixing of the components, and there is not enough fuel, such a mixture is considered “poor.”

    It should not be allowed and oversaturation, as with a large amount of fuel compared to air, malfunctions or engine wear are also possible. Adjustment of the carburetor is necessary not only before initial use, but also when any deviations in its operation are detected. Before you start working with a chainsaw, do not forget to run it in.

    The carburetor design contains a standard set of elements, but may vary slightly depending on the manufacturer. Components:

    1. The basis. This is a special tube that visually resembles an aerodynamic design. Air passes through it. In the transverse direction, a shutter is located in the middle of the pipe. Its position can be changed. The more it is pushed into the passage, the less air enters the engine.
    2. Diffuser. This is the lent part of the tube. With its help, the air supply rate increases in the very segment where the fuel comes from.
    3. Channels to supply fuel. The fuel mixture is contained in the float chamber, then passes into the nozzle, from which flows into the spray.
    4. Float chamber. It is a separate structural element that resembles the shape of a tank. Designed to constantly maintain an optimal level of fuel fluid before entering the channel from where air comes.

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    What you need to have to configure and adjust your chainsaw yourself

    Each carburetor owner must have the necessary tools to adjust this system. There are three adjusting screws that are located on the device. They have their own markings:

    • L. screw for low speed correction.
    • H. screw for adjusting high revs.
    • T. regulates idling, in most cases it is used for experiments.

    Before adjusting the carburetor, you need to prepare the device:

    1. The engine warms up, that is, it starts about 10 minutes before repair, and turns off when work starts (see how to start a chainsaw).
    2. The air filter is checked and flushed.
    3. The chain is stopped by turning the T screw all the way (see chain oil).

    To carry out safe repairs, you need to prepare a flat surface where you can neatly position the device and unscrew the chain in the opposite direction. Need a tachometer. It determines the presence of a malfunction in the carburetor. At revolutions of the screws, the sound should be perfect and absolutely even. If screeching notes are noticed, then the mixture is oversaturated.

    How to properly adjust the factory saw

    Carburettor adjustment is divided into two main stages. The first is called basic. It is made with the engine turned on. The second is performed when the engine is warm.

    To carry out the carb adjustment procedure successfully, you need to familiarize yourself with the instruction manual specific model to identify additional features of the device settings.

    First stage

    The adjusting screws of the highest and lowest revolutions should be carried out clockwise until the highest resistance is encountered. When the screws reach the stop, you need to translate them in the opposite direction and leave after passing 1.5 turns.

    Main stage

    The engine starts at medium speed and it warms up like this for about 10 minutes. The idle adjustment screw must be clockwise. It is released only when the engine comes into stable operation. It must be ensured that the chain does not move during this process.

    In idle mode, the engine may stall (the reason is here). In this case, immediately adjust the adjusting screw clockwise to the stop. Sometimes the chain begins to move. In this case, turn the adjusting screw in the opposite direction.

    Acceleration Test

    You need to do a little research. The acceleration of the device is initiated. It is necessary to evaluate the serviceability of the engine during the maximum speed. When the engine is functioning properly, it means when you click on the accelerator, the speed quickly rises to 15,000 rpm.

    If this does not happen or the speed increase is too slow, you must use the screw marked with the letter L. It turns counterclockwise. It is necessary to observe moderate movements, since the turn cannot be more than 1/8 of the full circle.

    How to adjust the maximum number of revolutions

    To limit this figure, you need to use a screw marked H. To increase the number of revolutions, turn it clockwise, and to decrease it in the opposite direction. The maximum frequency must not exceed 15,000 rpm.

    If you make this figure more, the engine of the device will run to wear, which will lead to problems in the ignition system. When rotating this screw, the ignition processes of the device must be taken into account. If the slightest glitches appear, then the maximum value of the revolutions must be reduced.

    Final idle check

    Before this procedure, it is necessary to perform a full adjustment of the components of the carburetor when operating at maximum speed. Next, you should check the operation of the device in idle cold mode. When the correct parameters are reached during adjustment, you can see the exact compliance of the carburetor design with the following criteria:

      When the idle cold mode is connected, the circuit does not move.
    How many revolutions does a chainsaw have

  4. When even a slight pressure on the accelerator is carried out, the engine accelerates at an accelerated pace. With a gradual increase in pressure, you can notice that the engine speed is proportionally increasing, reaching the maximum allowable values.
  5. When the engine is running, you can compare its sound with a four-stroke device.
  6. If abnormalities are noted in the given parameters or the device was not fully adjusted, you need to perform the main setup step again. Sometimes actions are performed incorrectly. In this case, the device may fail due to the loss of the correct node settings. In this case, you will have to contact a specialist.

    Dismantling the carburetor if necessary to check or repair the components

    The device of different models of carburetors is almost the same, therefore, when working with them, you can use the standard scheme. All items must be removed carefully and then lay out in the order below, so that you can successfully arrange the objects in place at the end of the repair work.

    1. The top cover is removed. To do this, unscrew the 3 bolts holding it in a circle.
    2. Foam is also removed, as it is the upper part of the filter that conducts air.
    3. The fuel hose is removed.
    4. The drive rod is displayed immediately on it.
    5. The cable tip is disconnected.
    6. The gas hose can be completely removed by steadily pulling it off the fitting.

    To finally prepare the carburetor for a major overhaul or replacement of the smallest parts, you need to carefully disconnect it from the main system. Sometimes it requires further disassembly. Unscrew the components carefully and fold the fasteners in groups, as these small parts are easily lost.

    How to properly configure a Chinese-made saw. adjusting instruction

    To correctly configure the carburetor of a Chinese chainsaw, you must first remember the factory settings of the device, then turn on the engine. In the future, you will have to leave it to work for several hours to accurately set your own parameters. Sometimes work is performed once after a ten-minute operation of the engine, however, many Chinese-made models require special handling.

    Adjustment Procedure:

    1. Events start at idle. Using the adjusting screws, you need to achieve a systematic set of revolutions by the engine, so you should first let it work at low speeds. A deviation from the norm is the movement of the chain along the bus. In this case, it is necessary to adjust the extreme position of the extreme screws so that the chain remains stationary.
    2. Switching to medium speed revs. Sometimes the engine smokes at the same time. This defect can be eliminated by tightening the screw to supply a leaner fuel mixture.

    In this case, the smoke will disappear, but the engine speed will increase. It is necessary to adjust the settings to the level where, when you press the throttle, the engine gains speed smoothly, sharp jerks or interruptions are not heard.

  7. Device engine check in progress. The chainsaw is transferred to the minimum speed, and then a rapid pressing of the lever is carried out. With maximum pressure, it is held for 3 seconds. If there is a malfunction in the engine, it is necessary to gradually loosen the screw until the optimum position is reached.
  8. Chainsaw should work for several hours in real conditions. It is necessary to engage in sawing wood, and then perform an inspection of all the elements involved in this event. If there are deviations, they need to be corrected using adjusting devices. When all defects have been eliminated and optimal settings have been set for the supply of correctly concentrated fuel, the process of setting up the device can be considered completed.
  9. Before buying, we recommend that you familiarize yourself with the rating of chainsaws for reliability and quality.
    Look at the video clearly: