How to Adjust Idle Speed ​​on Husqvarna 137

Among the leaders in the chainsaw industry, one of the best is the Husqvarna brand, which has been operating in the gas-powered tool market for many years.
The range includes chainsaws for various purposes, both amateur and professional. For home use, we have presented an interesting and very popular model - the Husqvarna 137 chainsaw. The tool is really interesting to residents of European countries, and now the saw is available in Russia. The chainsaw is positioned as a non-professional one, it has simple characteristics, but excellent quality. The brand successfully competes with another representative of chainsaws - Stihl. The Swedish assembly is visible at first glance; the saw works really well with wood. The latest modification of the chainsaw has eliminated previous shortcomings, and therefore has all the necessary protection systems and modern systems. The functionality and other features of the Husqvarna 137 include:

• The chain tensioner device is located on the right;
• A universal key is used for a chainsaw;
• The unique “Auto Tune” system allows you to quickly adjust the carburetor;
• X-Torq engine, which significantly reduces emissions of harmful substances and reduces fuel consumption;
• Easy startup using the updated system;
• Reduced vibration on the handle during long periods of use.

If we touch on history, we can note that the chainsaw has been produced for a long time. More specifically, since 2005. It was intended for domestic purposes, which it still does today. The owners actively used it in such tasks as cutting down small trees, twigs, boards, preparing firewood and trimming bushes on the territory. Simple, versatile and reliable, these are the main parameters of the Husqvarna 137.

Operational advantages

The popularity of this model is largely based on its affordable cost, easy maintenance, comfortable operation and high maintainability.

Using the spare parts available in the assortment, the owner can carry out a full repair of the product with his own hands with minimal expenditure of material resources and time.

The operating instructions included with the kit contain useful information about the features of preparing the tool for the first and previous starts, the maintenance sequence, technologies for finding and independently eliminating possible faults.

The detailed details given in the description allow you to clarify the installation sequence when performing repair work of increased complexity.

The use of spare parts from the branded repair stock provides the owner with the opportunity to restore the performance characteristics of worn components and assemblies to almost 100%.

Chainsaw Husqvarna 137, model description

Currently, the Husqvarna 137 chainsaw has been discontinued, but it still remains a competitive tool with high performance, durability and maintainability (the owner of the equipment, who has all the necessary spare parts, can perform the necessary repair and adjustment work with it, with his own hands). This modification of the chainsaw is successfully used for sawing logs and boards (longitudinal, transverse and diagonal cuts), trimming tree crowns, trimming branches, and in construction.

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Device

The Husqvarna 137 saw combines elements of classic mechanical engineering design with modern technical and technological solutions. The design is a block containing a two-stroke internal combustion engine with an air cleaner, clutch kinematics, containers with a fuel mixture and oil for lubricating the cutting chain.

The guide bar and cutting chain belong to the category of replaceable equipment, therefore, after the end of their service life, they are replaced with identical analogues. The design of the connecting unit does not exclude the use of the tool with components from other brands, 13 and 15 inches long.

The advantages of this model:

• affordable price;
• light weight and compact overall dimensions;
• excellent balancing;
• convenient access to adjusting and tuning elements of the structure;
• carburetor adjustment that does not require special equipment;
• economical and durable high-speed internal combustion engine with a large reserve of torque.

Husqvarna 137 chainsaw device

When assembled on the Husqvarna 137 saw, you can consider:

• Handles (front, rear and starter handle);
• Covers (cylinder, clutch and starter);
• Brake chain handle;
• Tanks (for fuel and chain oil);
• Lever (throttle lock, adjustment and choke);
• Ignition switch;
• Muffler;
• Tire with guide and end sprocket;
• Chain with a screw for tensioning it;
• Protective shield for the right hand.

Photo of a disassembled Husqvarna 137 chainsaw

Inside the device there is a system of fuels and lubricants, including a carburetor, as well as an ignition system.

Evaluation parameters and scope of application

The tool's high center of gravity, narrow configuration and flat body bottom contribute to the slow accumulation of fatigue. The user rating obtained during the survey is evidence of the high reliability, power and versatility of the model.

For a 10-point scale, the average was 8.3.

The characteristics of the tool determine its use in a wide range of household works, including:

• firewood preparation;
• preparation for installation of construction timber;
• formation of crowns of ornamental and fruit trees;
• independent production of wooden items for interior design and landscape design.

The saw successfully copes with single-pass, standard, longitudinal and diagonal sawing of hardwood with a diameter of up to 30 cm. The compact design makes it possible to work in hard-to-reach places, which is especially valued in construction technologies.

Specifications

The Husqvarna chainsaw model 137 is equipped with a compact carburetor internal combustion engine with a displacement of 36.3 cm3, developing a power of 2.2 hp in operating mode.

The engine runs on a dosed gasoline-oil mixture, which enters the float chamber of the best-in-class Walbro carburetor from a built-in 410 ml tank.

Confident starting of the power unit in winter is facilitated by a convenient manual starter, an electronic ignition system and proper carburetor tuning. The 137e series version of the basic chainsaw is equipped with an easy start system.

Operator comfort is increased through the use of an effective vibration damper, low background noise, convenient grip and access to the air intake.

Setting up the Husqvarna 137 Chainsaw

Content

Do-it-yourself chainsaw carburetor adjustment

For an independent carburetor option, you need to familiarize yourself with its structure and understand the procedure for the work that is carried out to adjust the parts responsible for the proper functioning of the components of the device and parts close to it.

It is necessary to carefully handle items for the system option, and also to determine whether the set characteristics correspond to very acceptable values.

About the carburetor design

The carburetor serves to mix the flammable mixture with air while maintaining predetermined proportions. If clear doses are not followed, the proper operation of the engine is at risk. When a huge amount of air enters during mixing of the components, but there is not enough fuel, then such a mixture is considered “lean”.

Oversaturation should not be allowed, because with a larger amount of fuel compared to air, malfunctions or engine wear are also likely. Carburetor adjustment is needed not only before initial use, but also when any differences in its operation are detected. Before starting to work with a chainsaw, do not forget to run it in.

Carburetor components

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 is visually similar to an aerodynamic design. Air passes through it. In the transverse direction, a damper is located in the middle of the pipe. Its position can be changed. The more it is extended into the passage, the less air enters the engine.
2. Diffuser . This is the constricted part of the tube. With its help, the air supply speed increases precisely in the segment from which the fuel comes out.
3. Channels for fuel supply. The fuel mixture is contained in the float chamber, then passes into the nozzle, from which it flows into the atomizer.
4. Float chamber . It is a separate structural element, reminiscent of the shape of a tank. Designed to constantly maintain the optimal level of fuel fluid before entering the channel from which air enters.

Don't know which chainsaw to choose? Read our article.

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

Or explore foreign chainsaw manufacturers such as Shtil.

What you need to have for setup

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

• L - screw for correcting low speeds.
• H - screw for adjusting high speed.
• T - regulates idle speed, in most cases used for experiments.

Chainsaw air filter

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

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

To carry out a safe repair, you need to prepare a flat surface where you can carefully place the device and turn the chain in the opposite direction. Need a tachometer. It determines whether there is a malfunction in the carburetor. When turning the screws, the sound should be perfect and absolutely smooth. If you notice squealing notes, the mixture is oversaturated.

Setup instructions

Carburetor adjustment is divided into two main stages. The first one is called basic. It is performed with the engine running. The second is performed when the engine is warm.

To carry out the carburetor setup procedure successfully, you need to read the operating instructions for a specific model in advance to identify additional features of setting up the device.

First stage

The adjusting screws for the highest and lowest speeds should be moved clockwise until the highest resistance is met. When the screws reach the stop, you need to move them in the opposite direction and leave them 1.5 turns.

Main stage

How to properly adjust the carburetor on a Husqvarna chainsaw

How to tune the carburetor on a chainsaw Husqvarna

Adjusting the carburetor on
a chainsaw
using three THL screws.

Husqvarna 137 Mixture setting

Quick adjustment of the air-fuel mixture to restore the start of the chainsaw.

The engine is turned on at medium speed and warms up for about 10 minutes. The screw responsible for adjusting the idle speed should move clockwise. It is released only when the engine reaches stable operation mode. It is necessary to ensure that the chain does not move during this process.

In idling mode, the engine may stall (the reason is here). In this case, you must immediately turn the adjusting screw clockwise until it stops. Sometimes the chain starts to move. In this case, turn the adjusting screw in the opposite direction.

Checking acceleration operation

Need to do a little research. Acceleration of the device is initiated. It is necessary to evaluate the proper operation of the engine during maximum speed. When the engine is functioning correctly, it means that when you press the accelerator, the speed quickly increases to 15,000 rpm.

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If this does not happen or the increase in speed is too slow, you must use the screw marked L. It turns counterclockwise. Moderate movements must be observed, since the turn cannot be more than 1/8 of a full circle.

Maximum number of revolutions

To limit this indicator, you need to use a screw marked H. To increase the number of revolutions, turn it clockwise, and to reduce them in the opposite direction. The maximum frequency should not exceed 15000 rpm.

If you make this figure larger, the device’s engine will wear out, which will lead to problems in the ignition system. When rotating this screw, you need to take into account the ignition processes of the device. If the slightest malfunctions appear, then the maximum speed value must be reduced.

Final check at idle

Before this procedure, it is necessary to carry out a full adjustment of the carburetor components when operating at maximum speed. Next, you should check the functioning of the device in idle cold mode. When the correct adjustment parameters are achieved, you will notice that the carburetor design closely matches the following criteria:

1. When the idle cold mode is activated, the chain does not move.

Chainsaw accelerator

1. When the accelerator is pressed even slightly, the engine accelerates at an accelerated pace. With gradual deepening of pressure, you can notice that the engine speed increases proportionately, reaching the maximum permissible values.
2. When the engine is running, you can compare its sound to a four-stroke device.

If violations are noticed in the given parameters or the device has not been 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.

Disassembling the carburetor if necessary to check or repair components

The design of different carburetor models is almost the same, so when working with them you can use the standard scheme. All elements must be removed carefully, and then laid out in the order given below , so that you can successfully place the items in place after the completion of the repair work.

Removing the Top Cover

1. The top cover is removed. To do this, you need to unscrew the 3 bolts holding it in a circle.
2. The foam rubber is also removed, since it is the upper component of the filter that conducts air.
3. The fuel hose is removed.
4. The drive thrust is output directly to it.
5. The cable end is disconnected.
6. The gasoline hose can be completely removed if you systematically pull it off the fitting.

To finally prepare the carburetor for major repairs or replacement of the smallest parts, you need to carefully disconnect it from the main system . Sometimes further disassembly is required. You should unscrew the components carefully and put the fasteners in groups, as these small parts are easily lost.

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Instructions 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. Subsequently, you will have to leave it running for several hours in order to accurately set your own parameters. Sometimes work is carried out only after ten minutes of engine operation, but many Chinese-made models require special handling.

Chinese chainsaw model

Adjustment procedure:

1. Activities begin in idle mode . Using the adjusting screws, you need to achieve a systematic increase in engine speed, so you should first let it run at low speeds. A deviation from the norm is the movement of the chain along the bus. In this case, you need to adjust the outer screws to the optimal position so that the chain remains motionless.
2. The transition to medium speed speed is carried out . Sometimes the engine starts to smoke. 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. You need to adjust the settings until you reach a level where, when you press the throttle, the engine smoothly picks up speed, and no sudden jerks or interruptions are heard.

• The device's engine is being checked . The chainsaw is switched to minimum speed, and then the lever is quickly pressed. When pressed maximally, it is held for 3 seconds. If there are problems with the engine, you need to gradually loosen the screw until the optimal position is reached.
• The chainsaw should work for several hours in real conditions . You need to cut wood, and then inspect all the elements involved in this event. If there are deviations, they must be corrected using adjusting devices. When all defects have been eliminated and the optimal settings have been established to supply correctly concentrated fuel, the device setup process can be considered complete.

Take a look at the video:

Conclusion

In order for the chainsaw to work properly, you need to carefully carry out the work of adjusting the carburetor in exact accordance with their order. If any malfunctions occur in the operation of the device, you must completely disassemble it yourself. In most cases, replacement of any parts that have become unusable is required.

By constantly checking the quality of carburetor settings and taking timely actions to improve its operation, problems with the chainsaw will not arise.

Read about which chainsaw to choose here.

Carburetor adjustment

The factory settings of the fuel equipment bring the engine to operating modes that are optimal in terms of power and efficiency.

The need for additional correction arises when switching the tool to summer or winter operating modes, when traction characteristics decrease or the fuel octane number changes.

• Following the instructions in the instructions, you can adjust the carburetor yourself. To do this, after warming up the engine, you need to tighten the quality screw all the way and unscrew it 4.5 turns.
• If the chain moves while the engine is running, you must use the services of a service center specialist.
• If, with the fuel equipment adjusted, the engine does not start or starts and stalls, you should make sure that there is gasoline in the supply tank, that the spark plug is in good condition, and that the air intake filter is clean.
• The engine stalls under load - the cause may be a lean mixture due to a clogged main jet.

Traction characteristics and stability of engine operating conditions are largely dependent on the quality of fuel and engine oil. Old gasoline or gasoline stored for a long time in a plastic canister can cause a number of characteristic failures and malfunctions.

Headset

Replacement equipment consists of a 15-inch guide bar and 0.325-inch pitch chain driven by a drive sprocket. The chain tension is adjusted using a special device.

Cooling and lubrication of the chain is realized by dosed supply of oil to the working area. Oil is supplied to the pump inlet from an internal reservoir with a volume of 200 ml.

Replacing a worn tire-chain set is not technically difficult. In order to independently remove the chain drive sprocket, you must use the universal key included in the factory kit.

The use of recommended chain oils has a positive effect on the efficiency and durability of removable equipment as a whole.

Commissioning the Husqvarna 137 chainsaw

To ensure long-term operation of your Husqvarna chainsaw, you need to follow a number of simple steps:

1. Assemble the device.
2. Install the headset, pull the chain.
3. Prepare the fuel mixture and refuel the chainsaw.
4. Pour fresh oil into the oil tank.
5. Start the chainsaw as described in the manual.
6. Check the serviceability of the brake system.
7. Check the saw at idle speed and adjust the carburetor if necessary.
8. Make sure that the oil supply to the circuit is in the correct quantity.
9. Husqvarna 137 chainsaw tested.

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The fuel mixture consists of high-quality AI-92 gasoline and original Husqvarna engine oil for two-stroke engines in a ratio of 50/1, where 100 ml of engine oil per 5 ml of gasoline.

Chainsaw works

The breakthrough period lasts 10 hours. During this time, it is not recommended to load the tool; the load should not exceed half the power of the power plant. During the breakthrough period, the moving parts of the power plant start up. If the tool is overloaded, the piston may become stuck, damaging the power source and therefore the chainsaw itself.

Benefits of a chainsaw

• despite the budget cost, the design of the tool is identical in many respects to semi-professional class models;
• the saw differs from prototypes in the optimal ratio of power, weight and overall dimensions;
• the instrument is characterized by modern ergonomics of the body, handles, placement of main and auxiliary controls;
• high-quality and durable materials were used to manufacture critical parts and systems;
• the durability of the engine crank assembly has been increased by the use of special processing technologies and the application of durable wear-resistant coatings;
• The presence of a reliable and high-speed emergency brake virtually eliminates the possibility of injury to the operator in the event of a chain jump, kickback, or other unusual situations.

Owner reviews

I am a four year owner of a used 137. I can’t say anything bad; the chainsaw is reliable, productive and versatile in all respects. There are no problems with spare parts, tires and chains for any price. I earn money for gasoline from neighbors and acquaintances by dumping relatively small trees and sawing firewood. The machine is low-cost to operate, the oils are expensive, but you can save a little on chain lubrication. Towards the end of each chain’s life, I fill it with a mixture of diesel oil and a spindle that is uniform in density. Zhenya

In practice, I compared the work of the Shtil 180 and the Husqvarna model 137. Despite the small remaining service life, both machines deserve the highest rating. In my opinion, Husqvarna is more flexible, the grip is comfortable and reliable. An engine with stable traction in summer and winter, but sensitive to fuel quality and precise dosage of engine oil. I would love to buy a new device, but this model is no longer for sale. They advise me to buy the next model 236, but I’m afraid to buy a fake, especially since in the practice of my friends such cases are not uncommon. Vasily Viktorovich

I heard a lot of good things about the survivability and reliability of the Husqvarna 137 model of motor saws, so there were no doubts when purchasing its improved version 137e. The machine pleased us with its light weight, effective operation of the vibration compensator and easy start system. After about 20 hours of operating time, a leak opened in the oil pump area, the equipment was under warranty, I had to take it to a service center. It turns out that all that was needed was to tighten the fasteners. In all other respects, the saw is impeccable; in 5 years of operation there has not been a single serious failure. Valery Nikolaevich

Business date, meeting

According to its parameters, the saw is designed to solve everyday problems. Thanks to its light weight, compact size and low price, it is ideal for small jobs: cutting firewood, boards, cutting tree branches, cleaning trees and shrubs on the site.

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By the way, the chainsaw was in great demand among road workers due to its compactness and reliability. This was ideal for long periods of tree trimming on city streets.

Despite the amateur class, the chainsaw has been and remains very popular among loggers, as it is ideal for small jobs when collecting firewood.