Husqvarna chainsaw 137 DIY repair

Today, almost every owner of a private house or an advanced summer resident uses a chainsaw, which has high mobility, unpretentiousness in operation and repair. Among the many models of gasoline equipment and equipment on the market, it is worth highlighting the Swedish brand Husqvarna. Founded 400 years ago, Husqvarna first produced weapons, and in 1959, due to the need to expand its product line, it launched the production of chainsaws. Unlike competitors, this manufacturer sought to improve the layout of the saw. To reduce the level of noise emitted by the engine, the famous designer from Sweden, Sixten Sazon, used a muffler in a Husqvarna chainsaw using a motorcycle as an example.

Almost all professional and amateur chainsaws are equipped with air-cooled two-stroke gasoline engines.

Husqvarna chainsaw: main components

This assumes the presence of at least one cylinder with heat sink fins. The fuel supply system (carburetor) performs the function of a gasoline-air mixer. Dirt, dust, chips should not enter the working combustion chamber along with the fuel mixture, and filters are installed on the saws to clean the air supplied. Manufacturers recommend changing the filter once a season. In the interval between replacements with a frequency of once every 10-15 refueling, it must be cleaned.

For the convenience and ease of starting the internal combustion engine in any chainsaw, a starter is provided, which is a coil with a wound cable and a handle. Even the most powerful husqvarna chainsaw is equipped with a sophisticated starting mechanism.

In order to reduce the vibration transmitted to the feller's hands, a special device is installed on the tool. In addition, this mechanism prevents the tire from "pulling" while sawing wood.

Despite the fact that ideal chainsaws have not been created and it is unlikely that anyone will succeed, this Swedish company strives to perfect the design and increase the power of its models. The entire range of husqvarna saws is characterized by pleasant improvements that greatly facilitate the work of its owner.

General view of the husqvarna chainsaw

These positive options include:

• use of the "suction" button of fuel (primer) for the convenience of starting the internal combustion engine;
• automatic adjustment of the carburetor by the Auto Tune system;
• chain tensioner located on the side;
• environmentally friendly and powerful X-Torg engine;
• vibration reduction system;
• chain forced lubrication mechanism through a hole in the driven sprocket;
• centrifugal air purification Air Injection, allowing less frequent filter changes;
• universal key for maintenance and repair.

In order to avoid acquiring fake Husqvarna chainsaws, it must be remembered that their licensed production has been established exclusively in Sweden, the USA, Russia, and Brazil.

Regardless of the power, performance and dimensions of the models, their problems are divided into 2 types:

1. Malfunctions of the engine, fuel supply system, cylinder-piston group, muffler;
2. Transmission breakdowns (malfunctions of the brake system, tires, chains, clutches, etc.).

Based on many years of experience, most experts confidently assert that the main causes of breakdowns lie in the operation of the internal combustion engine. The bright manifestations of the incorrect operation of the chainsaw motor include:

• difficult start;
• unstable idling;
• does not develop full power;
• extraneous sounds are heard during operation.

In order to reduce the complexity of diagnostics and subsequent repair of a Husqvarna chainsaw with their own hands, experts advise starting with components and parts that are simpler in terms of maintainability.

The first step in diagnosing the ignition is to check the spark plug. It must be unscrewed from the cylinder shaft with a special key or socket head. The gap between the side and central electrodes should vary between 0.7 and 1.5 mm.

Husqvarna chainsaw problems

If this distance is exceeded, a periodic absence of a spark will be observed. On the contrary, if the discharge gap is too small, it will not be enough to fully ignite the fuel mixture. You can set the recommended clearance parameters using metal probes, which you can buy at any automotive store.

If there are traces of gasoline on the surface of the candle, then most likely it does not burn completely. It is not necessary to look for the causes of malfunctions in the Husqvarna ignition system in the absence of moisture on the candle, since in this case it is necessary to adjust the fuel system, the steps of which are described below.

The most common types of ignition failures include incorrect clearance (more or less than 0.2 mm) between the flywheel and the ignition coil. It can also be set independently using probes.

The fuel supply system is one of the most complex in the unit, and therefore it should be taken as seriously as possible and follow certain rules. Gasoline may not enter the carburetor for the following reasons:

- blockage of the breather (holes in the tank lid);

- Clogged fuel filter.

To clean the breather, you need to prepare a regular sewing needle. In the second case, it will be necessary to dismantle the tank and replace the fuel filter.

Carburetor with adjusting screws

The entire model range of the Swedish manufacturer is equipped with traditional carburetors with three adjustment screws:

1. Screw "T" - setting the flow of the mixture at idle;
2. Screw "L" - adjustment at low speeds;
3. Screw "H" - at maximum speed.

First of all, it is necessary to “find” the highest speed with the L screw at no load (at idle). Then turn it counterclockwise a quarter of a turn.

If in this position the chain on the bar continues to move, it is necessary to achieve a stop using the screw T.

husqvarna chainsaw carburetor

To adjust the Husqvarna carburetor at maximum speed, after pressing the accelerator key to the full, wait 10-15 seconds. We turn the screw "H" clockwise by ¼ turn and listen to the operation of the internal combustion engine. If during the operation of the motor there is an extraneous sonorous “squeal”, we gradually unscrew the bolt until it disappears. On the contrary, with excessive smoke, it is necessary to deplete the mixture by gradually tightening the screw.

After setting the minimum and maximum speeds, we adjust the idling of the saw. To do this, turn the “T” screw clockwise until the chain begins to move along the tire.

Proper adjustment of the fuel system requires a tachometer (a device for measuring revolutions per minute), as well as the experience of the owner.

The ICE starting system is used to turn the shaft and, as a result, spark and ignite the fuel mixture. Like most models, the Husqvarna kick starter consists of:

Husqvarna chainsaw starter

When jerked by the starter, the ratchet of the drum engages with the engine shaft, as a result of which the crankshaft will scroll. Despite the condition of the tool, it is quite problematic to start the engine the first time. To facilitate the start-up, it is required to make several presses of the primer (mixture pumping button). A backup spring can be provided in the starter design, which, after compression of the main one, gives a sharp push to the shaft.As such, repair of the starter is not provided, and if one of the elements breaks down, it will need to be replaced.

The cutting chain of saws of this manufacturer consists of working teeth, cutting depth limiters, fixing pins. The most loaded in the sawing process are cutting links made of high-alloy structural steel. By design, they are divided into left- and right-handed. The width of the cut is determined by the distance from the side edges of the left and right links.

Do-it-yourself husqvarna chain tensioning

The main characteristic of a husqvarna chainsaw chain is the pitch, which can be measured from the first to the third rivet, dividing the result by two. Due to the fact that the inch is adopted in the Western calculus, manufacturers in the passports of the tool indicate the pitch in inches (25.4 mm). For medium power chainsaws, 3/8 inch chains are used, and for heavier ones, 4.

One of the most important indicators of the chain is the thickness of the shank, which for most models is 1.3 mm. They are often used on specialized and ordinary amateur instruments. The thickness of the links must necessarily be matched to the groove of the bar, since excessive thickness can lead to chain breakage or drop.

When the chain is relaxed, it is necessary to tighten it by means of a mechanism located on the side of the unit. Having previously removed the left side cover (2 bolts), loosen the husqvarna chainsaw bar. Next, we unscrew the longitudinally twisted bolt, thereby moving the guide away from the power unit. When properly adjusted, the chain should spin easily, but not dangle on the bar.

An important protective unit in a chainsaw is certainly a chain brake, which, in the event of a kickback, blocks the rotation of the cutting edges. As a result of the rebound of the tire in the direction of the feller and, as a result, his possible injury, the friction mechanism disengages the drive sprocket and the drive shaft.

Husqvarna Chainsaw Chainsaw Rejection

The brake start may be of a contact or inertial design. In the first case, the protection will work as a result of the reverse rejection of the unit. The inertial braking system consists in the occurrence of large inertial forces acting on the drive shaft. Regardless of the features of a particular design, experts recommend purchasing chainsaws equipped with similar mechanisms.

After the repair and adjustment of the Husqvarna chainsaw, it is first necessary to check the performance of the brake assembly.

In all presented models of chainsaws, oil is supplied to the tire automatically.

The main components of the husqvarna chain lubrication system

Before starting work, you need to make sure that there is a lubricant in the reservoir. The oil pump is in interaction with the drive sprocket, and when the shaft rotates, the gear supplies lubricant to the working surface of the chain. Due to the constant presence of oil on the cutting edges, the chain is less subject to friction and, as a result, loses its properties much more slowly. When the lubrication mechanism of a husqvarna saw fails, a small chain with a brown tint will be observed. Periodically, the left protective cover of the unit must be removed and the oil hole cleaned with compressed air or a needle. The feed rate of the pumping unit directly depends on the number of revolutions of the tool.

The chainsaw has become an indispensable and important tool in the daily life of every owner. The popularity of this tool has been growing from the very beginning of its inception, since with its functionality it has greatly facilitated the life of every forester, gardener and just ...

How to choose a chainsaw is not an easy question, the product range is simply huge, so many people have difficulty buying this product. After all, you want not only to buy a chainsaw for yourself, but also to invest your money profitably and buy a really reliable and practical thing.If you decide to acquire this kind of equipment, and do not know what to pay attention to when buying, then this article is for you.

Here you can find answers to your questions regarding the technical characteristics of one of the most popular models among chainsaws - Husqvarna 137. This "amateur" version of the chainsaw, more professional is the shtil chainsaw.

Husqvarna is a company with many years of experience in the production of high quality tools and equipment for gardening, and their products are perfect for industrial large-scale construction.

The range of the manufacturer is huge, but the main focus of the company is the production of chainsaws.

In creating their “masterpieces”, the manufacturer primarily strives for quality, and also pays considerable attention to innovations related to the production of this kind of equipment.

It is this feature that inspires great confidence among customers.

This model has a significant advantage, namely low weight, which contributes to more convenient operation, and it is also quite economical, since the manufacturer equipped it with an engine (two-stroke) that has a small volume. But, despite this kind of functionality, the Husqvarna chainsaw is quite powerful. One of the most successful models is the Husqvarna 137 saw.

As for the characteristics of the chainsaw, then its weight is about 4.6 kilograms, despite the fact that this is the “net” weight of the tool, without the presence of oil, fuel and tires with a chain. Of course, in full gear, the chainsaw will weigh much more, but the indisputable advantage is that thanks to the long tire, which has 38 centimeters, operation becomes easier. It is this feature that makes it possible to produce deeper cuts.

The chainsaw of this manufacturer has a very solid power, which is about 1.6 kW, which contributes to a significant increase in the level of vibration waves, and this is a significant minus in working with this tool. Of course, the manufacturer, when creating his products, thought out how to reduce this kind of vibration and supplemented the technique with the so-called anti-vibration mechanism.

If we talk about revolutions, then in operating mode their number is 13,000, and in running condition - 3,000.

The tool is controlled by a double-lever design with a built-in starter, which, in truth, is quite inconvenient, because due to its location during maintenance, it is difficult to reach certain parts. Choosing an inexpensive chainsaw for the home is not an easy task. If you decide to opt for this model, then you will have to pay a considerable amount for such a chainsaw, as it is one of the most expensive in the range of products manufactured by this manufacturer. You can get acquainted with the prices for chainsaws made in Russia here.

If you have finally made your dream come true and acquired for your household such an indispensable assistant as a Husqvarna 137 chainsaw, then it's time to get acquainted with all possible breakdowns and methods for their elimination. After all, as they say, you need to be prepared for anything and a breakdown can occur at the most inopportune moment.

To date, there are a huge number of workshops that are engaged in the repair of this kind of equipment, but it takes time to get your chainsaw in good working order, and besides you will have to pay a certain amount for the service.

But, you must admit that it is much more economical and easier to repair the Husqvarna 137 chainsaw with your own hands. In fact, if the breakdown is not significant, then there is no point in spending money, but you can easily fix the breakdown.And so that in such cases you at least have an idea of ​​​​what is wrong with your tool and how to perform “first aid”, below we will provide all the most common malfunctions and repair instructions for the Husqvarna 137.

In this video you can see the disassembly instructions:

If you encounter a chainsaw malfunction, the first thing to check is the spark plug. But this must be done very carefully, by means of a special hook, having previously disconnected the wire. The most important thing you should pay attention to is the actual appearance of the candle.

A dry surface indicates that the fuel has stopped flowing into the cylinder, therefore, the problem of breakage is not in the candle, so it must be screwed back.

But if spark plug covered in fuel spray, then this indicates that the problem is either in the carburetor, the adjustment of which was not done correctly, or the start rule was violated.

In order to eliminate this kind of problem, it is necessary to thoroughly wipe the candle, shut off the fuel supply and turn on the starter. This is done in order to ventilate the combustion chamber and get rid of excess fuel. After that, the cleaned candle must be installed in place and the chainsaw started.

And the last thing that can happen to a candle is that it can be covered with soot, which indicates that you are using low quality oil, which is not acceptable if you want the tool to serve you for many years. Also, the reason for this may be an error in the calculation of oil and gasoline, and an incorrect carburetor adjustment process.

In this case, you must clean the candle by rinsing it and removing carbon deposits with an awl, then wipe the electrodes with a sandpaper and put them in place. In addition, it is important that the gap directly between the electrodes and the candle should not exceed 0.5 - 0.65 mm, otherwise a new gasket must be installed.

It is important to pay attention to whether a spark is present. For this kind of manipulation, you need to put the ignition cable directly on the candle, then connect the cylinder and the nut located on the candle with pliers, and start the starter.

Then sparks should appear, but if they are absent, then in this case the problem is a chainsaw malfunction in a candle that needs to be replaced. But there are times when there is no spark even after replacement, this indicates that the high-voltage wire is faulty or the direct connection to the candle is broken.

There are situations when fuel does not enter the cylinder, this kind of malfunction can occur for the following reasons: firstly, a dirty filter (fuel). In order to clean it, you must first remove the hose (fuel), and then check how well the fuel flows. Since through this manipulation you can find out what is the cause of the breakdown.

Since if the jet is weak, then the reason is in the filter, that is, it needs to be cleaned. To do this, it must be obtained directly through the tank, namely through its fuel hole. Naturally, it is possible to reduce the likelihood of contamination, but for this it is necessary to carry out periodic preventive maintenance, namely, it is advisable to replace the old filter with a new one at least once every three months. The cause of the breakdown may also be insufficient viscosity of the oil for the chainsaw chain.

It may also take place in breakage clogging of a special hole, which is located on the fuel tank, namely on the cap. This kind of hole is called a breather. You can check whether it is working or not by disconnecting the hose, and then clean it with a needle. It is also worth noting that there are several reasons for the breakdown, one of which is the contamination of the filter (air).

Consequently, the air does not enter in the required amount directly into the carburetor, this leads to the fact that the process of motor work is disrupted. If you are experiencing the issue where the chainsaw stalls when adding gas, the details are here.

In order to clean the filter, it is necessary to rinse it and clean it in clean water, but this must be done very carefully. After that, it is very important to dry it and install it in place. And also the cause of the breakdown may be incorrect adjustment of the carburetor, which must be done using three screws.

But remember that each manipulation must be carried out, using the instructions, because otherwise you can only aggravate the situation.

And the final cause of the breakdown is considered to be clogged channels or the integrity of the carburetor membrane is broken.

If your chainsaw starts and stalls, the reason for the video is here.

If you are faced with a situation where the engine works great directly at low speeds, and if you increase the speed, it starts to stall, then the spark arrester is faulty.

The spark arrestor located in the muffler is most likely clogged with combustion waste.

In order to clean it, you must first remove the muffler, and then disassemble it. It is worth remembering that there are models that cannot be disassembled. After you took out the muffler needs to be cleaned off, using detergents, after washing, be sure to dry it with a hairdryer, and after the manipulations are finally completed, you must install it in place.

Undoubtedly, a chainsaw occupies an important place in the daily life of each of us, especially when it becomes necessary to carry out certain work in the garden. Chainsaw rating by quality See here.

And if you are going to buy a chainsaw for yourself, then you will make the right choice and you will not regret it for a second.

First of all, what I would like to draw your attention to, as this is the fact that this kind of tool will perfectly serve you for various kinds of manipulations related to sawing wood, logging and gardening.

Malfunctions of the Husqvarna 137 chainsaw are not so rare, but the specifics of its device allows you to cope with most of them on your own! Learn how to choose a chainsaw video here.

A chainsaw is a great helper for any man who lives 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?

The reasons for which adjustment of this node will be needed can be listed for a very long time.

Among the main faults are the following:

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

This is a non-exhaustive list of all known faults. Sometimes a procedure such as adjusting the carburetor on a Husqvarna chainsaw needs to be carried out after a major overhaul of the power plant or after maintenance.

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

On chainsaws of these models, a 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 structure and know the principle of operation.

For precise supply of fuel with oil, the operation of 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 correct operation of the dosing chambers and the pump is organized, which improves the operation of the chainsaw.

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 the mixture should be thoroughly mixed. The amount of gasoline and oil in the fuel mixture is shown in this table:

ATTENTION! Application of oils: “Lukoni-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.

Two dampers mounted on the diffuser chamber are responsible for the air supply. The first can regulate the amount of air at the moment the accelerator is pressed and is called the throttle, and the second ensures that the air supply is limited at the moment when the chainsaw is cold-started. To facilitate starting, the damper is closed, which means that the mixture becomes rich, as it is saturated with more fuel. It is easier to work in this mode, but since it increases fuel consumption, this mode is not used throughout the entire operation. The saw is working hard.

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, appear when this mechanism does not work properly.

1. The most common mistake is storing the instrument 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 an increase in the amount of air in the mixture, caused by suction from outside when the valve does not work properly. It is no longer possible to regulate here, since in this case only repair of the valve or its replacement helps, since the saw will not react to the adjusting screws.

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

• screw L - designed to adjust the number of revolutions when working in medium modes and regulates low revolutions;
• Screw H - adjusts the number of high revolutions and the thrust of the installation;
• T - 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 set them up 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 early wear and failure. This principle is embedded in many devices.

No table provides settings parameters. Therefore, you should not look for this data in specialized literature, but just follow the instructions clearly. The table in the passport has only informational value regarding the characteristics of the engine.

In order to correctly adjust the chainsaw carburetor, you must stock up on the appropriate tool in advance.

You will need the following list:

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

Many Husqvarna chainsaws use special gauge adjusting bolts. Look in advance which ones you have installed and purchase the appropriate kit.This will help to avoid many difficulties at the initial stage.

Like all other saws, husqvarna has the same carburetor 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 all other components are working properly. The fuel supply to the float chamber should work without interruption, and the ignition system is set up correctly and has a fresh spark plug.

• Set the carburetor to factory settings. This must be done with the engine stopped.
• Now you can start the engine and be sure to warm it up for several minutes. Husqvarna 137 XX carburetor adjustment is made only on a warm engine.
• By turning screw L clockwise, you need to set the highest speed of the crankshaft, then turn it back a quarter of a turn. Use screw T to adjust the crankshaft speed so that the chain does not rotate. It must not be driven 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 passport data. If they differ, then unscrew or tighten screw H. By changing the range, you can create restrictions to make the saw work efficient and save the motor resource.

↑

Once the Husqvarna carburetor adjustment is complete, you need to make sure that the engine is stable, and the saw easily picks up and slows down the required speed. The rotation of the chain at idle is considered abnormal, so you need to adjust its connection with the clutch again using screw H.

Do not forget that the knot is not set up immediately: you need to wait a while, since the Husqvarna chainsaw does not immediately respond to changing the position of the screws. This time can vary from 5 to 15 seconds. This time is not prescribed by the table, so you can only find out experimentally.

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

In order for the chainsaw to still start even if the setting is incorrect, 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 you change the position of the screws to achieve the desired fuel consumption and maximum 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 of this line, I recommend watching this video: