Husqvarna 142 Chainsaw Idle Adjustment

Narrow and smooth body, excellent power to weight ratio, as well as some of the best vibration indicators among all existing saws. The economical pump stops lubricating the chain when the saw is idling.

Chainsaw adjustment champion "class =" alink "href =" http://sawwood.ru/content/2288 ″>carburetor chainsaw

The carburetor has three adjusting screws:
L. low speed jet screw
H. high speed jet screw
T. idle adjustment screw
echo3500 adjusting screws

Using the screws H and L, the ratio of the fuel and lubricant mixture to the air is determined by the opening of the throttle valve. When you tighten the screws (clockwise), the mixture becomes leaner. low revolutions, when you turn off the screws (counterclockwise) the mixture is enriched, the speed rises.

Screw T adjusts idle speed. When turning clockwise, the number of revolutions increases, counterclockwise. decreases.

The main carburetor setting is done at the factory when testing the saw. The carburetor is adjusted to a richer than optimal mixture. This adjustment should be maintained during the first hours of operation of the saw. Then the carburetor is precisely adjusted.
When the chain is idling, turn screw T counterclockwise until the chain stops.

Fine adjustment of the carburetor can only be carried out in a preheated condition by specialists with special equipment (rev counter).

Husqvarna 142 chainsaw idle adjustment

First, screw L is adjusted, then H and finally screw T.

First you need to find the highest idle speed by slowly turning screw L clockwise (or counterclockwise). After finding the position of the highest revolutions, turn screw L 1/4 turn counterclockwise. If the chain rotates at idle, turn screw T by turning clockwise until the chain stops.

The adjustment of the screw H affects the power and speed. Adjusting the carburetor to lean mixture leads to excess revolutions and failure of the saw.

After warming up the engine at full speed for 10 seconds, turn screw H 1/4 turn counterclockwise. Run the engine for about 10 seconds. Check maximum speed with tachometer. Repeat the operation if the maximum speed does not match the passport. The engine should sound like a four-stroke. If the mixture is too lean, the saw squeals. When adjusting the carburetor to a too rich mixture, the muffler begins to smoke.

For optimal adjustment, contact a specialist with access to the tachometer.
Fine adjustment of idle speed by screw T is carried out after adjustment of screws L and H.
If you need to adjust the idle speed, then with the engine running, screw T must be turned clockwise until the saw chain begins to rotate. Then you need to turn the screw back counterclockwise until the chain stops rotating. The idle speed is set correctly if the engine runs uniformly in all positions with a sufficient speed margin when the chain starts to rotate.

The carburetor is correctly adjusted if the engine accelerates immediately and works as a four-stroke at full throttle by noise. Adjusting screw L to a lean mixture results in difficult starting and poor acceleration of the engine.

What is a carburetor?

A carburetor is a device that is designed to prepare a combustible mixture of liquid fuel and air, which ensures the operation of carburetor internal combustion engines.

Modern carburetors are equipped with many different devices and systems that have numerous openings of various calibers, an extensive network of channels, pneumatic chambers and linkage gears.

A carburetor is one of the main parts of any fuel-powered vehicle. To ensure normal and stable operation of the equipment, it is necessary to periodically check and, if necessary, adjust the carburetor.

Chainsaw carburetors have three adjustment screws. The screw “L” is used to regulate low revolutions, the screw “H” is responsible for the regulation of high revolutions, and the screw “T” is responsible for idling the chainsaw. So, the “H” and “L” screws adjust the ratio of the mixture of air and gasoline, when the screws are unscrewed, the revolutions increase, since the mixture is enriched, and when the screw is twisted, the speed decreases.
Generator carburetors often have only one adjusting screw, but many other modifications to this spare part are possible. Its adjustment eliminates excessive fuel consumption and leakage of unburned oil.

However, there are quite common cases when adjusting the carburetor cannot solve the malfunction of the equipment. This is due to the final breakdown of the part, which occurs as a result of natural wear or due to improper operation.

A versatile, multi-purpose saw for part-time use. Narrow and smooth body, excellent power to weight ratio, as well as some of the best vibration indicators among all existing saws. The economical pump stops lubricating the chain when the saw is idling. Easy Start system. a new spring starter mechanism and a fuel pump, reducing the number of jerks required to start.

Gear stop not included
Specifications:

Air discharge
Air injection A centrifugal air treatment system for long intervals between filter cleanings, trouble-free operation and reduced wear.
Easier to start
Combined adjuster / stop facilitates starting the saw. Decompression valve
Simplicity in work
The narrow case, high center of gravity and a flat bottom make our saws extremely easy to operate.
The principle of two masses
Vibration absorption system and handles isolated from the motor by steel springs. Independent anti-vibration system.
Smooth operation
A damping clutch reduces vibration in the carburetor. Provides trouble-free operation and extends the service life.
Three section crankshaft
Forged three-section crankshaft designed to maximize service life and designed for the most severe applications.

Best grip
Curved front handle for a better grip and natural working posture.

Economical pump
The economical pump stops lubrication at idle.

Fast acceleration
The light weight of all moving parts of the motor suggests rapid acceleration.

Easy cleaning
The bayonet mount air filter makes it easy to remove the filter for cleaning.

Safety in use
The double-action chain brake, the right hand guard and the chain limiter increase the safety of working with the saw.

Carburetor Huskvaran 137-142 HUSQVARNA 137-142

Carburetor for Husqvarna 142-136 chainsaw

Chainsaw carburetor GOOD LUK GL45
120 UAH

Carburetor for Rebir 1.4 chainsaw
200 UAH

How to adjust the carburetor of the Husqvarna 142 chainsaw

How to adjust the carburetor of the Husqvarna 142 chainsaw

  1. Read in google
  2. Chainsaw Carb Adjustment
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The carburetor has three adjusting screws:

L Low speed jet screw

H high speed jet screw

T idle adjustment screw

Using the screws H and L, the ratio of the fuel and lubricant mixture to the air is determined by the opening of the throttle valve. When tightening the screws (clockwise), the mixture depletes low revolutions; when loosening the screws (counterclockwise), the mixture is enriched, the revolutions increase.

Screw T adjusts idle speed. When turning clockwise, the number of revolutions increases, counterclockwise decreases.

The main carburetor setting is done at the factory when testing the saw. The carburetor is adjusted to a richer than optimal mixture. This adjustment should be maintained during the first hours of operation of the saw. Then the carburetor is precisely adjusted.

When the chain is idling, turn screw T counterclockwise until the chain stops.

Fine adjustment of the carburetor can only be carried out in a preheated condition by specialists with special equipment (rev counter).

First, screw L is adjusted, then H and finally screw T.

First you need to find the highest idle speed by slowly turning screw L clockwise (or counterclockwise). After finding the position of the highest revolutions, turn screw L 1/4 turn counterclockwise. If the chain rotates at idle, turn screw T by turning clockwise until the chain stops.

The adjustment of the screw H affects the power and speed. Adjusting the carburetor to lean mixture leads to excess revolutions and failure of the saw.

After warming up the engine at full speed for 10 seconds, turn screw H 1/4 turn counterclockwise. Run the engine for about 10 seconds. Check maximum speed with tachometer. Repeat the operation if the maximum speed does not match the passport. The engine should sound like a four-stroke. If the mixture is too lean, the saw squeals. When adjusting the carburetor to a too rich mixture, the muffler begins to smoke.

For optimal adjustment, contact a specialist with access to the tachometer.

Fine adjustment of idle speed by screw T is carried out after adjustment of screws L and H.

if you need to adjust the idle speed, then with the engine running, screw T must be turned clockwise until the saw chain starts to rotate. Then you need to turn the screw back counterclockwise until the chain stops rotating. The idle speed is set correctly if the engine runs uniformly in all positions with a sufficient speed margin when the chain starts to rotate.

The carburetor is correctly adjusted if the engine accelerates immediately and works as a four-stroke at full throttle by noise. Adjusting screw L to a lean mixture results in difficult starting and poor acceleration of the engine.

How to adjust the carburetor on a Husqvarna 137 chainsaw

A chainsaw is a great helper for any man living in his house. The chainsaw device is a complex system that needs careful maintenance and requires increased attention. Today you will learn how to adjust the carburetor of the Husqvarna 137 chainsaw with your own hands in the garage?

When is carburetor adjustment necessary?

The reasons that will require adjustment of this unit can be listed for a very long time.

Among the main malfunctions, the following can be distinguished:

  • The increase in idle speed;
  • The appearance of a large amount of smoke during operation;
  • Deterioration of starting properties;
  • Insufficient tool power when cutting.

Here is a far from complete list of all known faults. Sometimes a procedure such as adjusting the carburetor on a Husqvarna chainsaw needs to be performed after a major overhaul of the power plant or after maintenance.

The developers of Husqvarna 137 write in the passport that carburetor adjustment must be carried out before and after the tool break-in.

How does a carburetor work on a Husqvarna 137 chainsaw?

On chainsaws of these models, the Walbro carburetor is most often installed from the factory. Before you adjust the Walbro carburetor on a Husqvarna chainsaw, you need to have a minimal understanding of its device and know the principle of operation.

What is responsible for the supply of a mixture of fuel and oil

For an accurate supply of fuel with oil, the fuel pump is used, which is driven mechanically from the crankshaft. The carburetor itself is equipped with a diaphragm and a special needle valve, which are responsible for regulating the pressure in the system. Thanks to them, the organization of the correct operation of the metering chambers and the pump occurs, which improves the operation of the chainsaw.

Fuel mixture

When operating a chainsaw, a fuel mixture of gasoline and oil in a ratio of 15: 1 by volume should be used, i.e. 1 liter of oil should be added to 15 liters of gasoline and mix thoroughly. The amount of gasoline and oil in the fuel mixture is shown in this table:

ATTENTION! Application of oils: “Lukony-2T; TNK-2T OIL: AZMOL Sport 2T GD ”, etc., and used oil in the fuel mixture will lead to failure of the connecting rod needle bearing.

Video: Husqvarna 142 Chainsaw Idle Adjustment


What is responsible for the air supply

Two air dampers installed on the diffuser chamber are responsible for the air supply. The first can regulate the amount of air at the moment of pressing the accelerator and is called the throttle, and the second provides a restriction of air supply at the moment when the chainsaw is cold-started. To facilitate starting, the shutter is closed, which means that the mixture becomes rich, as it is saturated with a large amount of fuel. It is easier to work in this mode, but since it increases fuel consumption, this mode is not applied throughout the entire operation. The saw works for wear.

To spray fuel into the cylinders, a nozzle with a check valve is used.

The principle of operation is simple: it limits the return of the mixture back to the chamber. All the main malfunctions of chainsaws, most often, occur when the mechanism does not work properly.

  1. The most common mistake is storing the tool for too long. The fact is that with prolonged inactivity the valve sticks and either fills the cylinder with fuel or simply does not open.
  2. The second problem is the increase in the amount of air in the mixture, caused by suction from the outside when the valve is not working properly. It is no longer possible to adjust here, since in this case only valve repair or replacement helps, since the saw will not respond to the adjusting screws.

Unlike a car, setting up the carburetor of the chainsaw provides three adjusting screws that are responsible for the quality of the mixture, the number and nominal speed of the crankshaft of the Husqvarna engine:

  • screw L. designed to adjust the number of revolutions during operation in medium modes and adjusts low revolutions;
  • Screw N. adjusts the number of high revolutions and the thrust of the installation;
  • T. is designed to adjust the total amount of fuel and adjusts the operation of the throttle assembly.

It is not recommended to touch the first two screws without special skills. The problem is that if you configure them incorrectly, the carburetor will not be able to start the engine, or even start it in the wrong operating modes. Such adjustment of the screw can lead to its speedy wear and failure. This principle is embedded in many devices.

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Settings are not listed in any table. Therefore, you should not look for this data in the specialized literature, but just clearly follow the instructions. The table in the passport has only informational value regarding the characteristics of the engine.

What will I need to adjust the Husqvarna carburetor with my own hands?

In order to correctly adjust the carburetor of the chainsaw, you must first stock up with the appropriate tool.

You will need the following list:

  • The most common screwdriver with which to loosen or tighten the adjusting screws;
  • A tachometer designed to calculate the speed of the crankshaft. It is necessary to adjust the idle speed, since it is rather problematic to determine the number of revolutions per minute;
  • Phillips screwdriver. It is needed so that it is possible to unscrew the screw (T);
  • Compressor with a special gun connected to them. A purge device will help get rid of excess litter and dirt, as the carburetor must always be clean.

Many Husqvarna chainsaws use special cross-section adjusting bolts. Look in advance which are installed with you and purchase the appropriate kit. This will help to avoid many difficulties at the initial stage.

Husqvarna Chainsaw Carb Adjustment

Like all other saws, husqvarna has the same carb adjustment algorithm. Therefore, the instruction will be relevant for other tools and models of chainsaws such as Husqvarna 142, 236.

Before starting work, make sure the air filter is clean and that all other components are working properly. The fuel supply to the float chamber should work without interruptions, and the ignition system is configured correctly and has a fresh candle.

  • Set the carburetor to factory settings. Do this with the engine stopped.
  • Now you can start the engine and be sure to warm it up for several minutes. Adjustment of the XX carburetor Husqvarna 137 is carried out only on a warm engine.
  • Turning the screw L clockwise, you need to set the highest revolutions of the crankshaft, then turn back a quarter of a turn. Use screw T to adjust the crankshaft speed so that the chain does not rotate. It should not be set in motion without pressing the accelerator.
  • Now you need to set the maximum speed and their power. It is enough to connect the tachometer to the ignition system and set the maximum possible speed using the accelerator. Compare them with the passport data. If they differ, then unscrew or tighten the screw H. By changing the range, you can create restrictions in order to make the saw work efficiently and save the motor resource.

What you should pay attention to?

As soon as the adjustment of the Husqvarna carburetor is completed, you need to make sure that the engine is stable and that the saw easily picks up and slows down. The rotation of the circuit at idle speed is considered an abnormal phenomenon, therefore, it is necessary to adjust its connection with the clutch again using screw H.

Do not forget that the unit is not configured immediately: you need to wait a while, since the Husqvarna chainsaw does not immediately respond to the change in the position of the screws. This time can vary from 5 to 15 seconds. The table does not prescribe this time, so you can only find out experimentally.

If after adjustment a huge amount of smoke appears during operation, then the flow of the fuel and oil mixture must be adjusted. For these purposes, rotate screw L.

What is the factory setting for the Husqvarna chainsaw carburetor?

In order for the chainsaw to start anyway even with the wrong setting, the factory settings of the H and L screws are applied. Most Husqvarna chainsaws can be started by unscrewing both screws exactly one and a half turns. Only then can the position of the screws be changed in order to achieve the required fuel consumption and maximum work efficiency. XX is also regulated after these manipulations.

If you still have questions about adjusting the carburetor on the Husqvarna 137 chainsaw and other models in this line. I recommend watching this video:

How to repair a Husqvarna carburetor with your own hands?

During operation and diagnosis, defects in the carburetor can be detected. Most of them can be eliminated on their own with a minimum of knowledge and without contacting a specialized repair center.

Among the methods of elimination can be identified:

  • Replacement of various gaskets at the joints of tight parts;
  • Cleaning or replacing carburetor filter elements;
  • Replacement of pump elements or valves;

Almost all of the above details can be positioned as a repair kit, which is used for short-term repair of carburetors. After installing them, the carburetor of the Husqvarna 137 chainsaw can forget about the malfunctions for a long time, and regulation will become easier.

How to install a repair kit?

If the problem touched the carburetor nozzle, you can try to fix a serious malfunction with your own hands. However, the manufacturer recommends to deal with this nuisance only by replacing the node.

To remove the carburetor, you need to completely clean the saw from sawdust and shavings. To do this, use a compressor and a gun with compressed air. Next, the filter cover is unscrewed and the filter element is removed. After that, all throttle actuators and thrusts are disconnected from the husqvarna carburetor. Now you can remove the carburetor from the saw.

Next, you need to completely disassemble the carburetor and replace all the elements that the repair kit offers. Namely, spare parts and gaskets. This will save future damage.

Now you know how to adjust the carburetor of the famous Husqvarna 137 chainsaw.

Carburetor adjustment Husqvarna 142

Chainsaw Husqvarna 142. the brand tool of the economical group

Chainsaw brand products Husqvarna enters the first three of the more favorite models in Europe and the CIS countries. Chainsaw Husqvarna 142 is considered to be in the category of household appliances, but in its features can be used for many semi-professional works.

The design of the product is developed on the basis of traditional assembly using modern engineering and assembly technologies. When developing the model project, emphasis was placed on increasing the comfort of work, extending the life of critical parts and assemblies, and the safety of complex types of work.

Technical and technological features

To increase productivity, operational reliability and durability, higher-quality materials are involved in the production of the chainsaw assortment. Also experience in the successful implementation of past developments, own design solutions.

Only by purchasing the original, you can get full confidence that the power and other properties of the chainsaw Husqvarna models 142 can be controlled with transverse, diagonal or longitudinal sawing of all types of wood with a diameter of up to 30 cm.

  • These characteristics determine the suitability of the tool for the preparation of wood fuel, cutting the structure of timber, the formation of crowns of decorative and garden trees.
  • The possibility of operating a saw with smaller and more comfortable tires for working in inaccessible places determines the suitability of the tool for the construction of wooden structures for special and general purposes.
  • Working with a saw does not require professional qualifications; the necessary abilities are rapidly being developed in the process of the work itself.
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Structural advantages

Constant traction properties contribute to low-cost operation powertrain, economical fuel and consumables consumption. Comfort and safety of the instrument are ensured by the design of the case, comfortable configuration of the handles and balancing.

The list of additional amenities:

  • easy start system;
  • effective vibration damper;
  • access to tuning points of units and assemblies;
  • convenient placement of controls;
  • the ability to work with alternative working headsets.

Guaranteed operational safety and easy start

The risks of injuries in the event of an emergency are minimized due to the high-precision operation of the brake device, which is activated when the upper shield is slightly moved in the front direction.

Easy-start manual starter, booster pump and advanced electronic ignition guarantee a successful start powertrain in conditions of extremely low and high ambient temperatures.

Experts saw Husqvarna 142 is characterized as quite comfortable in work, productive, reliable and durable household tool that meets the requirements of modern technical and operational standards.

Information support

A detailed instruction manual contains information about the features of preparing the saw for work, maintenance, troubleshooting.

Read the same

The description of the most typical malfunctions will help to quickly eliminate the cause of the failure when the engine does not start or starts and stalls, and also does not develop full power.

The tool is characterized by established service. Spare parts and consumables are presented in a wide range. If necessary, the owner of the saw can perform a simple ongoing repair with his own hands.

Specifications

Model Husqvarna 142 features a tight layout, combined with convenient access to adjusting assemblies and filling necks. The 4.6 kg instrument is perfectly balanced, so it fits comfortably in the hands.

The ergonomic shape of the handles provides a secure grip for complex work. The built-in vibration protection system and low noise level contribute to high labor productivity and preservation of the operator’s working capacity when performing bulk work.

Carburetor adjustment. Husqvarna 137-142 AntiReg!

Hare feed the Chinese and goons. Disassemble and clean carburetor ,change dry diaphragms, twist and.

How to adjust carburetor Husqvarna chainsaw

How to tune the carburetor on a chainsaw Husqvarna carburetor adjustment on the chainsaw using three THL screws.

Powertrain

The saw is equipped with a 40.2 cm3 two-stroke carbureted air-cooled engine and 2.6 hp. The power unit is characterized by flexible traction parameters, optimal fuel consumption, easy start, simple maintenance and a long overhaul life.

The fuel is a mixture of gasoline and two-stroke ICE oil, which enters carburetor from an internal gas tank with a volume of 410 ml.

In the design features of the power unit:

  • a crankshaft made of forged steel;
  • wear-resistant chrome coating of the cylinder liner;
  • piston group with two compression rings and a working resource increased up to 5 years;
  • simplified access to the air filter;
  • reliable and durable ignition system;
  • best in class japanese carburetor Walbro

Built-in primer. the pump provides a quick start of the engine, regardless of the ambient temperature.

Carb adjustment

A separate section illuminates the carburetor adjustment sequence. Proper tuning of the fuel system contributes to the stability of traction characteristics and fuel economy.

Work is performed provided that the air filter is completely cleaned and the power unit is warmed up to operating temperature. By rotating the screws, quantity and quality, the engine is brought to the optimum operating mode with good throttle response and stable idle speed.

Additional adjustment may be required when switching to a fuel with a different octane number, when switching the instrument to winter or summer operating modes.

Headset

This assembly consists of a 15 inch removable guide rail, a cutting chain in 0.325 inch increments. The kit also has a drive sprocket and tensioner. It is possible to install alternative kits of a smaller size, which more closely meet the requirements of the task.

Chain lubrication eliminates overheating and accelerated wear. The system includes an oil pump with adjustable capacity, into which the working fluid is supplied from an integrated tank with a capacity of 200 ml.

How to adjust the carburetor of the Husqvarna 142 chainsaw

Chainsaw Carb Adjustment

The carburetor has three adjusting screws:

L. low speed jet screw

H. high speed jet screw

T. idle adjustment screw

Using the screws H and L, the ratio of the fuel and lubricant mixture to the air is determined by the opening of the throttle valve. When you tighten the screws (clockwise), the mixture becomes leaner. low revolutions, when you turn off the screws (counterclockwise) the mixture is enriched, the speed rises.

Screw T adjusts idle speed. When turning clockwise, the number of revolutions increases, counterclockwise. decreases.

The main carburetor setting is done at the factory when testing the saw. The carburetor is adjusted to a richer than optimal mixture. This adjustment should be maintained during the first hours of operation of the saw. Then the carburetor is precisely adjusted.

When the chain is idling, turn screw T counterclockwise until the chain stops.

Fine adjustment of the carburetor can only be carried out in a preheated condition by specialists with special equipment (rev counter).

First, screw L is adjusted, then H and finally screw T.

First you need to find the highest idle speed by slowly turning screw L clockwise (or counterclockwise). After finding the position of the highest revolutions, turn screw L 1/4 turn counterclockwise. If the chain rotates at idle, turn screw T by turning clockwise until the chain stops.

The adjustment of the screw H affects the power and speed. Adjusting the carburetor to lean mixture leads to excess revolutions and failure of the saw.

After warming up the engine at full speed for 10 seconds, turn screw H 1/4 turn counterclockwise. Run the engine for about 10 seconds. Check maximum speed with tachometer. Repeat the operation if the maximum speed does not match the passport. The engine should sound like a four-stroke. If the mixture is too lean, the saw squeals. When adjusting the carburetor to a too rich mixture, the muffler begins to smoke.

For optimal adjustment, contact a specialist with access to the tachometer.

Fine adjustment of idle speed by screw T is carried out after adjustment of screws L and H.

if you need to adjust the idle speed, then with the engine running, screw T must be turned clockwise until the saw chain starts to rotate. Then you need to turn the screw back counterclockwise until the chain stops rotating. The idle speed is set correctly if the engine runs uniformly in all positions with a sufficient speed margin when the chain starts to rotate.

The carburetor is correctly adjusted if the engine accelerates immediately and works as a four-stroke at full throttle by noise. Adjusting screw L to a lean mixture results in difficult starting and poor acceleration of the engine.