How to regulate a stihl chino chainsaw. STIHL MS-660 chainsaw. Technical characteristics and features of use

Adjustment of the carburetor of the chainsaw STIHL 250 videos. Adjustment of the carburetor of the chainsaw STIHL 230

230 STIHL in its characteristics refers to the class of semi.Professional chainsaws intended for harvesting firewood at a professional level (T.E. Not just saw the offships in the bathhouse, but for example for sale). Thanks to the size of the size and power of the chainsaws, it is perfect for construction made of wood and rolling trees. Due to the limited size of the tire, which is only 35-40 cm, the manufacturer is recommended to bring down trees with a diameter of not more than 30 cm. But, as practice shows, Stihl 230 copes with larger trunks perfectly.

Stable sustainable work at any speed, developed capacity, efficiency, use of technical capabilities in the volume provided for and laid down by the manufacturer, and even a motorcycle resource. All this depends on its carburetor. In addition to the fact that this node must also be kept in the proper condition and served in a timely manner, it must still be correctly adjusted. Setting up the chainsaw carburetor is not easy, but with a unhurried thoughtful approach and clear following the instructions, it is feasible for almost anyone, and it should be carried out at the first signs of the need for this, and regardless of whether the new motorcycle is operated or the types of types is operated. The need to adjust the fuel supply unit (hereinafter referred to as the UPT, that is, the carburetor) is evidenced by the following reasons, signs and malfunctions:

  • Factory or own settings were shot down due to weakening of adjusting bolts and vibration or in the process of unsuccessful attempts to adjust the carburetor in a new one;
  • Damaged lid of the UPT case;
  • The engine does not start or starts with a strain, and then stalls almost immediately;
  • The saw does not work steadily at idle or does not keep them at all;
  • Excess of fuel and too thick exhaust;
  • Electrodes of the spark plugs are black (supply to the re.Enriched mixture motor) or with a white plaque (impaired);
  • Motopila does not develop maximum turns or power;
  • The motor stalls during a speed set;
  • Strong vibration of the chainsaw is observed;
  • Due to violations in the operation of the air cleaning system into the distribution of the fuel-air mixture of the mechanism, particles of garbage hit;
  • The piston group has significant wear. In this case, the regulation of the UPT is used as a temporary measure that allows you to make the work of the tool more stable.

Naturally, when the mud gets into it, the fuel system needs to be washed. This problem cannot be solved by adjusting the carburetor. And a worn piston needs overhaul. However, in these cases, they also set up.

It can also be needed even when the brand or quality of fuel, atmospheric pressure, humidity and ambient temperature, height above sea level (when the place of operation changes from the plain to the mountainous terrain, and vice versa) can also be adjusted.

Before regulating the UPT, you must make sure that both filters (air and fuel) are clean. In addition, there should not be an air leak into the motor from the side (through the seals, laying under the UPT or its accelerating pump or somewhere else), otherwise it will not be possible to adjust the carburetor.

Almost any UPT is regulated by 3 screws:

  • One. The bolt of the chief nozzle designated “H” and used to set the maximum speed of the saw engine.
  • 2. Bolt of the idle jacket, designated “L” and used to set low speeds. That is, to regulate the idle.
  • 3. Idle taching bolt, indicated in various. “LA” (stihl), “t” (Partner, Husqvarna).

There are also carburetors with fewer adjusting screws. So manufacturers protect their products from unprofessional intervention and at the same time try to simplify their configuration.

Before starting adjustment, you should carefully study the operating instructions attached to the chainsaw, especially the part where the angles of rotation of the mood bolts are given. This is an important condition that will make it possible to set up without going beyond the operating parameters of the engine.

For safe regulation during its implementation, the rules should be followed:

  • One. The tool must be steadily installed on a flat surface of a rigidly fixed object (workbench, rack, table).
  • 2. The chain should be directed away from itself and other present.
  • 3. There should be a safe distance between the chain and any surrounding objects that guarantees the impossibility of their mutual contact.

In such cases, adjusting the carburetor on the chainsaw can be as follows. First start the tool and warm it up for 10 minutes.

We begin adjustment of the UPT by determining the position of the mood “L”, in which the idle speed will be the greatest. To do this, we very slowly and smoothly turn this bolt in one direction or the other. And so several times, until the right position is found. After that, we turn “l” by 1/8–1/4 turn (the required value is indicated in the technical documentation for the tool) counterclockwise (hereinafter PEF).

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Then we continue to regulate the idle stroke using the screw “s” (“la”, “t”):

  • If the chain after manipulations with the bolt of “l” is motionless, then it is necessary to smoothly rotate “s” (“la”, “t”) clockwise (hereinafter referred to as it) until it starts to move. Then twist the “s” to 1/8–1/4 turns back.
  • If the chain moves, rotate “s” (“la”, “t”) of the PFS until it stops, and then twist “S” to 1/8–1/4 turns in the same direction.

The engine should work evenly. And check it, how it accelerates. It is believed that the engine in acceleration mode works normally if, when you smoothly press the accelerator, the revolutions in a short time and without “failures” increase to its maximum value. If the engine works unevenly and/or poorly accelerates, then it is necessary to slightly. A maximum of 1/8 of the whole turn. Turn the “l” PCH. After that, it is necessary to again make the above settings “S” (“LA”, “t”). Repeat these adjustments until the engine starts to work evenly and accelerate well.

Device and principle of operation

STIHL MS 361 chainsaw carburetor consists of 42 parts, including gaskets and mounting screws. Main nodes:

  • A case with air and fuel supply channels, a funded chamber;
  • Diffuser;
  • Nozzles;
  • Air and throttle;
  • Membrane;
  • Manual fuel pumping pump (primer).

The fuel from the gas tank enters the carburetor, is sprayed there, mixed with air, the formed fuel-air mixture is supplied to the combustion chamber. A mixture with increased M gasoline is called enriched. If there is more air and there is less air, the mixture becomes impoverished. The composition of the mixture is adjusted by adjusting screws. The carburetor is considered a complex device because it provides the operation of the internal combustion engine in three different modes. Cold launch, idle and at maximum speeds.

With cold start, gasoline is pumped with a pump (primer button). At this moment, an enriched mixture with a large amount of gasoline falls into the still dry combustion chamber, which facilitates the launch. When starting, the air damper is closed.

After starting in the combustion chamber, during the operation of the internal combustion engine, a vacuum forms, into which the fuel-air mixture is sucked automatically.

At idle speeds, the throttle is closed, the flow of the mixture is limited.

When you press the handle of the gas, the throttle is opened, the supply of the mixture and the speed of the internal combustion engine increases.

The function of the membrane is to block the supply of fuel into a storage tank of the gas tank when it is full and open when there is little fuel.

The accumulative container is sometimes called a “float camera”, although there is no float in membrane carburetors.

regulate, stihl, chainsaw, ms-660, technical

In the “gas for the whole” throttle and air damper are completely open. The supply of gasoline in this mode is regulated only. The adjusting screw N when setting can reduce or increase the duct of gasoline through this hole. L and LA screws regulate idle and small speeds.

Adjustment of the Carburetor of the Stihl MS 361 chainsaw with your own hands

Three adjusting screws are designed mainly for factory adjustment. After assembling the carburetor and saw, each of them is tuned alternately, on special stands, taking into account the features of each chainsaw of the Stihl MS 361 chainsaw. The screws are securely fixed and do not spin spectacularly spontaneously. Adjustment is rarely required. Namely:

  • With a critical wear of the piston system, when the degree of compression (compression) has changed a lot.
  • When replacing the piston system, when the chainsaw does not work like during the factory setting.
  • When working in the mountains, where, due to low atmospheric pressure, the engine does not have enough oxygen, and it is necessary to increase the air supply (impoverish the mixture).

In other cases, idle speed is most often required if the engine stalls in this mode.

Necessary tools

A feature of the Stihl MS 361 chainsaw is easy access to the carburetor. It is enough to remove the lid and the air cleaner. Therefore, no tool is needed for adjustment, except for a screwdriver. For professional adjustment, a tachometer will be required. He will show the number of idle and maximum revolutions. Proper adjustment should provide 2500 rpm in idle and 10,000 rpm at maximum speeds.

The stihl ms 361 chainsaw can develop 12,500 rpm, but it is not recommended to operate it in such extreme mode.

In the absence of a tachometer, maximum turns are determined by ear. Idle. In two borders: the chainsaw should not stall when the idle speeds are small, the chain should not move when the turns are too large.

The tachometer allows you to more accurately adjust the maximum and minimum speed of the chainsaw

A step.By.Step adjustment algorithm

Before adjustment, you need to make sure that the air filter is clean. If it is scored, there may not be enough air to complete combustion of the fuel mixture. Therefore, the engine works incorrectly. Perhaps adjustment is not required, but you need to clean or change the filter.

The filter is removed and tried how the engine works without it. If good, then the problem is in the filter.

The engine without an air filter cannot work for a long time, only a trial start. Garbage that got inside the engine can disable it.

The presence of a carrier in the sparkler and a silencer grate is also checked. If the output of exhaust gases is difficult, the engine also works incorrectly and the problem is not in setting up the carburetor.

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Бензопила Stihl ms 660 в работе

Standard adjustment

The manufacturer of the chainsaw of the Stihl MS 361 in the operating manual (.37) recommends the next algorithm for adjusting the carburetor:

  • High speed adjusting bolt H rotate clockwise until it stops, but not more than 3/4 turnover.
  • The cloth of the idle stroke l is twisted clockwise until it stops. Then turn counterclockwise for 1/4 turnover.
  • Start and warm up the engine for 7-10 minutes.
  • Further, the idle stroke is adjusted to the adjustment of the stubborn screw LA when the engine is running. It is screwed clockwise, increasing idle speed until the chain starts to move. Then the lace of the la is unscrewed by 1/2 turnover.
  • If, when adjusting the La screw, it is not possible to adjust the idle speeds correctly (the engine stalls or the circuit spins), they are adjusted with a screw L. It is unscrewed by 1/4 turnover. Then they continue to adjust the La screw, unscrewing it counterclockwise until the chain stops. Then in the same direction is about 1/2 turnover. But so that the engine is not stalled at idle.

In addition to the recommendations of the manufacturer, there are practical points for adjusting the carburetor.

Adjusting screws of the carburetor of the chainsaw STIHL MS 361

Nuances that you need to know

When turning any screw, the factory setting changes. Therefore, it is extremely important to remember or write down the number of revolutions for which the position of the screws has changed when adjusting. For example, if the screw is twisted to the stop, it must be twisted, be sure to count the speed. Only this will make it possible to return to the parameters of the factory adjustment if it turns out to be unsuccessful.

  • La for idle.
  • H to adjust fuel supply at high speeds (main screw).
  • L to adjust the proportions of fuel and air (a mixture of screw quality).

The screws l and h are located near the la at some distance from them. All of them are marked on the case.

What you need to configure

To access adjustment, just remove the upper body cover and air filter. Therefore, the tool requires only screwdrivers for grooves of adjusting screws.

For professional tuning the carburetor, an electronic tachometer is required. This precisely indicates an idle speed and maximum speed. The rate of idle of the stihl MS 660 chainsaw is 2500 per minute, the maximum speed is 13,000 per minute.

Without a tachometer, the quality of the carburetor adjustment is determined by the hearing and actual operation of the internal combustion chainsaw.

Standard or standard setting

Hat and l screws click clockwise to the end, counting the number of revolutions. Their number is recorded or remembered. If the carburetor does not start the engine, these data will allow you to return to the source factory settings.

  • H and L screws are weakened clockwise, every 1 turnover.
  • Starting and checking the engine by ear or tachometer.
  • If the revolutions fail (suffocate) when pressing on the throttle, the screw H is weakened by another 1/4 turnover.
  • If the engine works at idle when you press the throttle, turn the screw l. 1 on 1/4 turnover.

Each chainsaw of the Stihl MS 660, which worked for some time, has its own characteristics, including the compression degree in the cylinder. Therefore, the settings are individual. Turning screws 1/4. 1/3 H and L in one or the other, they reach the optimal performance of the chainsaw engine at medium and maximum speeds.

Current setting

Experienced process operators may notice that the internal combustion engine of the chainsaw began to work worse. Sometimes it is enough to turn the screws h and l in one direction or another in turn with a slight step in 1/5. 1/6 turnover and immediately check the result of adjusting the carburetor in real work. This is one of the easiest ways to get a good setting.

Control of idle

Adjustment is required if the engine is idling. Low speed or scheme scheme. High speed.

Turns are reduced by tightening the screw La counterclockwise until the chain stops, and then turn by 1 / 5-1 / 4 turns.

Preparation for carburetor adjustment

The primary importance when setting all the characteristics of the dosage of the fuel of the STIHL 250 model is the highest adjustment screw located near the muffler. The factory setting, the parameters of which are depicted on the upper plastic cover, provides that it should be twisted on one revolution from a complete twist.

DIREHL 250 with your own hands is adjusted throughout the operation process. Writing the screw enriches the working mixture, since the air-fuel mixture receives a larger volume of gasoline, and tightening the screw impoverishes the working mixture, since the air fuel mixture receives less gasoline.

Adjusting the carburetor will not give positive results if there is an air leak on the engine side through:

Settling STIHL 250 carburetor is set up only after a careful inspection, identifying the existing air leaks. The next step in preparatory adjustment work is the full maintenance of all components and mechanisms.

  • Cleaning from deposits, slag, resins;
  • Engine washing using a solvent, acetone;
  • Replacement of the spark plug;
  • Cleaning, air filter washing;
  • Checking the tension of the cutting circuit;
  • Idle setting;
  • Warming up the engine to operating temperature.

Then you can proceed to complex settings manipulations.

STIHL 250 chainsaw: Carburetor setup

First of all, preliminary maintenance of the chainsaws, the process includes:

We warm the motor well so that the engine operation is stable and the carburetor gains the necessary speeds. Further, adjustment of the chainsaw of the Stihl 250 is carried out by the following stages:

  • Find the screws “h” and “l”, having previously drowned out the chainsaw. Wrap them all the way and turn them out for 1 turnover.
  • Start a chainsaw and let it work in idle for 5-10 minutes.
  • Take maximum revolutions (14,000 rpm.). Squeezing the gas and adjusting the screw “h”.
  • Nyita “la” bolt and set them idling so that the saw chain spins a little. After that, loosen the screw for ¼ turn.
  • If the Stihl 250 stalls or the speed is not stable, you will have to unscrew the “l” screw. At this time, the revolutions should increase.
  • The last stage is the achievement of the optimal idle stroke, the chainsaw should work at the mark of 2,600 rpm.
  • Carburetor Stihl 250 settled!
See also  How to change the piston on a STIHL 180

Please note that the above procedure may not help in view of the presence of air leaks. Often it is noticeable in the gasket between the carburetor, on the crankshaft or accelerator oil seals. Pay attention to the working environment, depending on the temperature conditions of the saw can work in different ways.

If you adjust the setting in time, the result will be a long operation of the Stihl chainsaw, reduced oil and fuel consumption.

User manual

STIHL MS-660 chainsaw has a complex device, handling equipment requires compliance with a number of rules and safety measures.

  • General description of the product;
  • Purpose and possibilities;
  • Certification, manufacturer and dilere data;
  • Unit device;
  • Work of parts and mechanisms;
  • Preparation for work;
  • Recommended fuel and oil, refueling procedure;
  • Playing the product;
  • Sequence and time of regulations;
  • Possible failures, malfunctions and methods of eliminating them;
  • Storage and conservation conditions;
  • Warranty obligations.

The document is written in an accessible language, visual illustrations and schemes help to understand all emerging issues.

Faults and repair Stihl 260

The main malfunctions of the Stihl 260 chainsaw, this is:

  • Difficult launch;
  • The saw does not start;
  • Unstable work at idle;
  • Power loss;
  • Lack of oil supply for lubrication of a saw chain;
  • Air leaks through the crankshaft seals;
  • Malfunctions of the ignition system, which are expressed in the absence of a spark.

Eliminate the problems that have arisen in the work of the STIHL 260, for example, if the saw does not start, you can in the official service center of the manufacturer. If it is necessary to carry out repairs and the absence of the opportunity to contact the service center, you can carry out repairs on your own.

Preparation for setting, parts of the carburetor for its implementation and safety measures

Before regulating the UPT, you must make sure that both filters (air and fuel) are clean. In addition, there should not be an air leak into the motor from the side (through the seals, laying under the UPT or its accelerating pump or somewhere else), otherwise it will not be possible to adjust the carburetor.

Almost any UPT is regulated by 3 screws:

Ремонт китайской бензопилы Stihl ms 660. Замена ведущей звёздочки, частичная разборка, сборка.

  • The bolt of the chief nozzle designated “H” and used to set the maximum speed of the saw engine.
  • Bolt of the idle jacket, designated “L” and used to set low speeds. That is, to regulate the idle.
  • Bolt of the idle adjustment, indicated by various manufacturers in different ways: “s”, “la” (stihl), “t” (Partner, Husqvarna).

There are also carburetors with fewer adjusting screws. So manufacturers protect their products from unprofessional intervention and at the same time try to simplify their configuration.

For safe regulation during its implementation, the rules should be followed:

  • The tool must be steadily installed on a flat surface of a rigidly fixed object (workbench, rack, table).
  • The chain should be directed away from itself and other present.
  • There should be a safe distance between the chain and any surrounding objects that guarantees the impossibility of their mutual contact.

Today, progress has gone a long way and has greatly simplified our life. In the end, we do not spend so much time on a particular work that used to be performed twice as long, and our forces are damaged. Including progress “jumped” in the production of power tools.

For the right choice of a chainsaw for your home, see here.

For us, a chainsaw has become an indispensable tool that allows you to easily chop large logs and with minimal energy consumption, and is already with pleasure preparing firewood for winter. Ease of use and practicality are the main advantages of this “assistant”.

This article is devoted to one of the models that are very popular and popular among Russian consumers, as well as domestic consumers, the whole world enjoys its work and unique characteristics. You can find it here on the Chinese chainsaw of Stihl 660. The analogue is the Stihl MS 180 chainsaw, an example that definitely costs your attention, and if you think about how much the device costs, it will be difficult for you to find shortcomings in it.

About the table

In the early twenties, a verse was born, the leader of which was an unsurpassed engineer a. Style. In the early years of its activity, the company was engaged exclusively in the production of steam boilers and washing machines. But, apparently, this was not enough for the manufacturer, and the chainsaws began to appear in his cars.

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