Husqvarna 5200 chainsaw DIY repair

In detail: Husqvarna chainsaw 5200 do-it-yourself repair from a real master for the site my.housecope.com.

Husqvarna 5200 - Chinese fake, was in operation for more than 5 years.
Over the years there have been no complaints about the work of the saw, but the time has come, and problems have appeared. The idle speed increased by itself, the chain did not stop, the idle screw did not help.
I didn’t pay much attention, because it was possible to work. But gradually the problem intensified, the idle speed increased to such an extent that it was possible to cut without even pressing the gas lever.
At some point, the saw stalled and completely stopped starting.

I was not particularly upset, since there was another saw on the farm, manufactured by another company.
And the Chinese Husqvarna was quietly gathering dust somewhere in the corner, until it once again caught my eye. And once again I thought: is it possible to repair it? Of course, there was not even a thought about the service center, it was very far away, and indeed. sheepskin is not worth the candle. Decided to dig in and figure it out myself.

Searched the Internet, asked around on the forums. The answer is almost the same everywhere: carburetor or crankshaft oil seals.
I bought a carburetor and changed it. The result is null. Well, as for the oil seals, the matter is more complicated, but still I decided to look. Began to disassemble gradually. When I removed the cylinder, I found a surprise. The gasket between the crankcase and cylinder was damaged. In fact, it was almost non-existent. From the gasket, only small pieces remained in the corners.

Unfortunately, there was nothing at hand to make a new gasket. I cut it out of thick cardboard, smeared it, installed it.
Collected the saw, pulled the starter. The saw started up.
A small adjustment of the carburetor, final assembly - and the saw worked for almost a year.

Video (click to play).

Then the same symptoms reappeared. I immediately thought that everything was repeating itself. Most likely, the paper gasket did not withstand the function assigned to it.
Actually, that's how it turned out.

Below are a few photos, maybe someone will come in handy.

An example workflow.
We unscrew five bolts, remove the top plastic cover.
Remove the air filter, unscrew the candle.
You can immediately remove the tubular handle, as it will interfere later when installing the cylinder.

Remove the muffler by unscrewing two bolts and two nuts (1,2,3,4).

We unscrew the two bolts (1.2) that secure the carburetor to the vertical rack.

We tighten two rubber tubes, remove the carburetor.

We unscrew the two bolts of the vertical carburetor rack and four bolts of the cylinder.

We take out the rubber tube from the hole in the vertical rack.
Remove the cylinder together with the vertical stand.
The photo below is the old gasket.

We take a sheet of paronite 1 mm thick and approximately 80x80 mm in size. Mark with a compass and cut a hole dia. 50mm. With an awl, we mark the centers of future holes for fastening, then cut them out with a scalpel right on the cylinder.
To prevent the gasket from moving, bolts can be temporarily inserted into the holes already cut.

Cut off the outer edge of the gasket.

Home » Husqvarna 5200 Chainsaw Carburetor Adjustment DIY

Installing a carburetor chainsaw. Or how not to pay repairmen!

Using a chainsaw makes life much easier even for an amateur, and in some professions this tool is almost indispensable. However, like any relatively complex device, a chainsaw requires periodic maintenance. Due to untimely or inadequate maintenance and due to the impact of both planned and excessive loads, various malfunctions can occur.For professionals, interruptions or erratic operation of the saw reduces work efficiency or can lead to a ruined work day. One of the most common malfunctions is incorrect chainsaw carburetor setting, which goes astray due to unsuccessful adjustment attempts or switching adjustment screws for other reasons.

The following symptoms and malfunctions indicate the need for carburetor adjustment:

the engine starts with a deformation and stops almost instantly;
gasoline consumption is excessively high, the exhaust is too thick, the combustible mixture in the cylinder does not completely burn out;
chainsaw carburetor factory settings were knocked down (due to vibrations or unsuccessful adjustment attempts);
malfunction of the air purification system, which led to the ingress of debris into the fuel distribution mechanism;
significant wear of the piston group. carburetor setting in this case acts as a temporary measure.

It is clear that when dirt enters the fuel system with one installation, the problem cannot be solved. flushing is required. A worn piston requires a major overhaul. However, in all these cases, the carburetor is also tuned.

The carburetor is necessary to prepare the fuel-air mixture for engine power. If the proportions in this mixture are incorrect, engine operation is interrupted. If the proportions to the increase in the amount of fuel are not observed, the mixture is said to be supersaturated if the fuel, on the other hand, is unlikely. At work, the engine is both not the best way.

In different models of chainsaws, carburetors differ in design, but in principle they are similar in action. The air stream moves at high speed through the air channel. The damper blocking the channel allows you to change the speed of the air jet. Fuel through the atomizer is fed into the channel, where it mixes with incoming air, forming a fuel-air mixture. The resulting mixture enters the engine.

The pressure in the float chamber, where the fuel is before mixing, is almost equal to atmospheric pressure. But the air passage creates a vacuum so that the fuel is drawn into the air stream. The more the flap is opened, the faster the air moves, and the amount of fuel also increases. engine speed increases. Therefore, it is easy to imagine the principle of a carburetor.

For efficient, smooth operation of the tool, for maximum performance and at the same time economical fuel consumption, tuning is required. chainsaw carburetor. Before tuning, check the fuel and air filters. they must be clean. Most chainsaws are adjusted with three screws: idle, high speed, low speed. When the carburetor is set correctly, the following signs indicate:

The chain does not move at idle.
The engine accelerates smoothly and quickly.
The sound of the running engine is smooth, similar to the sound of a four-stroke engine.

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

Boost idle on Husqvarna chainsaw 555.Carburetor tuning should be handled with all possible care, since errors in settings can lead to very serious consequences, up to engine failure. If there is no absolute confidence in your abilities, contact the service center.For the start mode, so that the parts are lubricated in sufficient quantity, carburettor setting Husqvarna chains are made so that the maximum speed is 600-700 rpm. below working. If it is not possible to set the operating maximum frequency on the tachometer, there is no need to change the presetting with screw H. Exceeding the maximum speed value by the manufacturer is prohibited.If, after the adjustment is completed, when the engine is idling, the saw chain moves, turning screw T counterclockwise causes it to stop completely.For fine adjustment, the saw must be heated for at least 10 minutes, set on a flat surface. The tire must be pointed in the opposite direction from the person doing the adjustment. At the initial stage, the highest idle frequency should be detected. To do this, screw L smoothly turn first left and right, and then vice versa. When the maximum speed is determined by an expert, it is necessary to turn the screw L counterclockwise to a value of 1/8 to a quarter of a full turn.The idle speed is controlled by the jet, marked with the letter T. It should turn from left to right until the chain starts to move. Then feed gently in the opposite direction until the chain stops turning. Screw H is considered to be set correctly if the noise of running the saw at full throttle without load remains small. If the exhaust is too smoky and the saw is very noisy. the mixture is too rich. It is necessary to turn the nozzle H clockwise until the correct sound is set. How to properly adjust the carburetor, you can watch the video below.In the Calm and Partner chainsaw, the proportions of air and gasoline in the mixture are set using the adjusting screws H and L. When the screws are loosened, the mixture is enriched and the speed increases. Screwing leads to a depletion of the mixture and, accordingly, a decrease in engine speed.Carburetor Chainsaw Adjustment Partner for using the T screw (Calm marks this setting with the letters LA). During the final tests at the factory, the basic tool adjustment is carried out. In most cases, the carburetor is adjusted to deliver a slightly richer delivery than optimally calculated. Factory settings should be kept for the first few hours of operation during the break-in period. After that, you can make finer adjustments, although this is not necessary, the saw will work normally and at the basic settings.To fine-tune the carburetor, a tachometer is required, in addition, strict technical documentation is required to perform the work in accordance with the manufacturer's requirements. The best solution. entrust the customer with tuning equipment for specialists. Image - Husqvarna 5200 chainsaw DIY repair

If you decide to adjust it yourself, start with the L screw, then move to the H jet, and then set the idle rotation by turning the T screw (or LA. if it's a quiet slot).

With the smooth rotation of the screw L in both directions, a search is made for the position at which the idle speed will be maximum. After this point is found, it is necessary to unscrew the screw L by 1/4 turn. If the chain continues to move with the engine idling, screw T (LA) is slowly unscrewed until the chain stops.

After adjusting the maximum speed of the screw H, the value of their frequency is checked on the tachometer. If the maximum speed does not match the values specified in the documentation, the adjustments are repeated. If the mixture is too rich at maximum speed, too much smoke comes out of the muffler, with a bad mixture, a squeal squeals and the engine overheats. The adjustment is completed by setting the idle speed. the correct position is taken into account if the motor runs smoothly at minimum speed and the chain is on that. Speed setting idle move can be seen in the video below.

Almost any Chinese chainsaw adjustments are the same as those of the brand's counterparts. There are the same screws L, H and T. Sometimes there are saws that are only adjusted at idle. However, according to the owners and employees of the service, not all chainsaws adjust the carburetor without problems.Even with experienced repairers, some models can take a decent amount of time before you get an acceptable result.

The standard for "Chinese" carburetors is the position of the screw L, in which it is loosened by half a turn from the fully clamped position. For screw H. one turn from the same state. In many videos, screw L is called mixture quality control, and screw H. its quantity. Idle speed is adjusted in the same way as described above, on a warm engine.

A chainsaw is a worthy replacement for hand saws and axes. Today, this tool is available in almost every household - it is indispensable for arranging a personal plot, construction and repair work. Intensive use and improper care of the tool can lead to premature tool failure. However, it is not at all necessary for the owner of a chainsaw to immediately contact the workshop - many of the malfunctions that can happen to it during operation can be eliminated on their own.

The main condition for a successful repair is the correct diagnosis. Therefore, in order to determine why the chainsaw failed and, most importantly, how to make it work again, you first need to know the features of its design.

It should be noted that it does not differ in particular complexity, since it includes:

engine (two-stroke gasoline);
functional part (saw bar and chain);
systems that ensure the joint operation of these two components (ignition, filtration, lubrication, etc.), that is, the tool as a whole.

In order to simplify the diagnosis of faults, it is customary to distinguish them into two main categories:

engine malfunctions;
malfunctions of other components of the chainsaw.

Most often, failures occur in engine systems, however, other parts of the tool, due to intensive use or improper care, can fail at any time. How to determine exactly where the breakdown occurred? Simple logic will help us with this.

If the problem is in the engine, it will:

do not start;
go deaf;
unsteady work;
overheat;
smoke;
develop insufficient power.

As for all other malfunctions, as a rule they manifest themselves with a normally running motor.

If the chainsaw won't start, the first thing to do is to check the fuel mixture in the tank. By the way, it must be prepared in the proportions specified by the engine manufacturer, otherwise the tool simply will not start.

After making sure that the fuel mixture is correct and available, the ignition system should be checked. To do this, inspect the spark plug.

Her condition can say a lot:

indicates that the fuel mixture does not enter the carburetor, which means that the problem is not in the ignition;

fuel-splattered candle

is the result of an excess of the fuel mixture, which lies either in a violation of the engine start algorithm, or in improper carburetor adjustment;

this is a signal about the presence of low-quality oil in the engine lubrication system, incorrect carburetor settings, or an incorrectly prepared fuel mixture.

If the spark plug is splashed with fuel, wipe it thoroughly after removing it. You should also clean the fuel supply system. To do this, it overlaps, after which the starter is turned on. A carbon-covered candle must be carefully cleaned with an awl and emery.

When checking candles, attention should be paid to the distance between the electrodes (the normal gap is 0.5-0.65 mm), as well as the condition of the gasket and the presence of a spark. A damaged or worn gasket will have to be replaced, and the spark can be checked by putting on the ignition cable, connecting the cylinder and spark plug nut, and cranking the starter.

If the discharge does not occur, the candle must be replaced. In the event that a spark does not appear with a new candle, then the problem is in the connection to the high-voltage wire or in itself.

If the fuel mixture does not enter the cylinder, but the spark plug is working properly, this may mean that:

The fuel filter is clogged.

To clean this assembly, remove the fuel hose and check the jet. If it is weak, the filter must be removed through the filler hole of the fuel tank and cleaned or replaced in case of complete wear.

As a preventive measure, it is recommended to replace the fuel filter at least once every 3 months.

This is nothing more than a hole in the fuel tank cap, which is cleaned with an awl.

The fuel mixture is not supplied or supplied in insufficient quantities.

There may be several reasons for this:

the air filter is clogged (in this case, it must be removed, rinsed with water, dried and put back in place);
the carburetor settings have gone astray (which means this assembly must be re-adjusted);
the integrity of the carburetor membrane is broken (it must be replaced);
the carburetor channels are clogged (it must be disassembled and cleaned of all parts and assemblies).

If the chainsaw motor works fine at low speeds, but starts to stall and smoke at high speeds, the problem may be hiding in the muffler.

To check the quality of its work, do the following:

dismantling (with obligatory closing of the outlet);
disassembly (if the muffler is collapsible);
cleaning from carbon deposits using special detergents or by dry method;
drying (using a hair dryer);
reassembly and installation.

Dry cleaning without respiratory protection is not recommended. The carcinogens present in soot will be released into the surrounding atmosphere in the form of dust, the inhalation of which is extremely dangerous to health.

To prevent clogging of the muffler during the operation of the chainsaw, you should carefully monitor the composition of the fuel mixture and the quality of its components.

If the chainsaw engine does not start or cannot develop normal power, it is likely that there is not enough pressure in the engine cylinder to burn the fuel mixture. The reason for this may be the wear of the elements of the cylinder-piston group - piston, rings, bearings, etc. In order to assess the condition of this assembly, it is necessary to conduct a visual inspection of it, after removing the muffler.

For a more complete diagnosis, a compression gauge is placed in the spark plug hole of a two-stroke chainsaw engine. It measures the compression in the engine. Based on the results of the check, one can judge the state of the CPG, however, accurate facts can only be obtained with a complete disassembly of the assembly.

If there are chips or scratches on the piston, it is obvious that it will have to be replaced. The same applies to deformed or broken piston rings - for normal engine operation, they must be fully functional and clean from carbon deposits.

A properly working carburetor guarantees maximum efficiency of the chainsaw, that is, it is possible to develop full power with the most economical consumption of the fuel mixture. The adjustment of this unit is usually carried out by the manufacturer, however, its design provides for the possibility of adjustment during operation.

The fact that such a setting will have to be performed by the owner of the chainsaw is evidenced by:

Strong vibrations or damage to the protective cap.
Depreciation of the CPG.
Carburetor blockage.
Inability to start the engine or its spontaneous stops after starting.
Increased fuel consumption and emissions while reducing engine power.

The chainsaw carburetor is adjusted in strict accordance with the manufacturer's instructions using three special screws that are responsible for the maximum ("M") and minimum ("L") revolutions, as well as idling the engine ("T"). In order to exclude unwanted interference by an inexperienced user in the operation of the carburetor, some manufacturers install only one idle screw.

Carburetor adjustment is carried out in two stages:

Basic (carried out with the engine off).
Finishing (carried out with a running, preheated engine).

For basic adjustment it is necessary to tighten the screws H and L until they stop and turn them back 1.5 turns. Finishing adjustment requires that the engine be warmed up for 5-10 minutes at low speeds.

The final calibration is carried out by turning the idle screw until the minimum engine speed is reached (its operation must be stable and the chain must be stationary). If the engine stops idling, the screw must be turned back, and if the saw chain is still driven, continue to turn it counterclockwise.

Calibration check is done by test:

Accelerations (when you gently press the accelerator, the engine should quickly gain momentum to the maximum rate).
Maximum speed (if there is a misfire, screw H should be slightly loosened).
Idle operation (the chain should not move, and the engine should pick up speed as quickly as possible).

If the owner of the chainsaw is not familiar with the carburetor device and does not have the tool necessary to calibrate it, you should contact a specialist. The carburetor is a very complex unit, so any wrong action can lead to irreversible consequences, such as complete failure of the engine.

If the diagnostics showed that everything is in order with the engine and its systems, then the cause of the malfunction should be sought in other components of the chainsaw. The most common problems are:

starter failure;
improper operation of the lubrication system;
incorrect operation of the chain brake;
saw chain wear, etc.

If the cause of tool failure is not visible to the naked eye, as is the case with an engine, a thorough fault diagnosis must be made and corrected in accordance with the manufacturer's recommendations and safety regulations.

, 142, 240, 365 s with my own hands. videoChainsaw. an indispensable assistant for every true master.With the advent of the tool, its popularity has increased dramatically.Thus, the Husqvarna 142 chainsaw has a high functionality. It is widely used not only in forestry, but also in households.It is easy to choose a chainsaw. Therefore, it is best to pay attention to well-known brands such as Husqvarna. This company manufactures a wide range of such instruments. Husqvarna 240 and other models are of high quality and functionality. But, unfortunately, even such tools are not immune from failures. Image - Husqvarna 5200 chainsaw DIY repair

After the chainsaw appeared in the house, many owners breathed a sigh of relief.

After all, this tool allows you to solve complex problems quickly and easily.

But here it is worth considering that the chainsaw often fails. This is due to the fact that during operation it is subjected to high loads. Therefore, you should always be ready to troubleshoot.

Today there are a large number of workshops that offer their services for the repair of chainsaws and other tools. But this does not mean that in the event of a malfunction, you should immediately run to the repair shop.

Some faults can be corrected manually. To do this, you just need to know the main causes of failures and how to fix them.

Thus, with frequent use of the tool, failures may occur:

carburetor;
muffler;
oil pump;
ignition and fuel supply systems.

Each of these failures can be eliminated with your own hands. The main thing. know the sequence of work in the elimination of a particular malfunction.

For an article on self-repairing a 180 chainsaw, read here.

If the tool suddenly stops working, the first thing to check is the ignition system. And you need to start with a candle.

The work must be done with great care.For this, a special hook is used. First you need to disconnect the wire from the mains and remove the candle.

If it is dry, it means the cylinder is not getting fuel.

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If the tool does not work, it may be because the cylinder is not receiving fuel.

First of all, you need to check the fuel filter for contamination. To test this, you need to remove the fuel hose and check how fast the fuel is flowing.

If it is supplied under slight pressure, the problem is that it is the filter.

In this case, you need to clean the filter. It goes right through the tank. The filter is cleaned and returned back. It is washed under running clean water.

After that, the filter is dried and carefully installed back. To prevent such a malfunction in the future, it is necessary to clean the filter periodically.

If cleaning the filter does not give a positive result, then you should pay attention to a breather. A clogged hole causes the carburetor not to get enough air.

If the chainsaw is used frequently, muffler malfunctions may occur. This is very easy to determine.

If the tool is running normally and as the speed increases it starts to stop, then the spark arrester is the cause.

Most often, this element fails as a result of contamination with combustion waste. You can easily solve this problem with your own hands.

First of all, you need to remove the muffler and take it apart. It should be borne in mind here that in some models, spark arresters do not understand. After that, the muffler is cleaned of carbon. To do this, use special detergents.

When the deposit is removed, the spark arrestor is dried with a hair dryer. At the final stage, the muffler is installed in place.

As for the carburetor, its adjustment and repair can be done at home. But in order to perform such work with high quality, it is necessary to know the structure of the carburetor and the principle of its repair.

Poor repairs can cause serious damage to the device. Therefore, experts recommend that adjustments and repairs be carried out in special workshops.

As you can see, many chainsaw problems can be fixed on your own. But for this you need certain information. If you are not confident in your abilities, it is better to seek help from specialists.

Watch the video in which the specialist shows in detail the dismantling-assembly process for repair with your own 142:

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 smart start 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 you to change the filter less often;
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:

Malfunctions of the engine, fuel supply system, cylinder-piston group, muffler;
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:

Screw "T" - setting the flow of the mixture at idle;
Screw "L" - adjustment at low speeds;
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

Video (click to play).

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.

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