Diagnostics of faults and repair of Husqvarna 137/141 chainsaw.

Husqvarna chainsaws are indispensable assistants in the household. With the help of gasoline motorized equipment, you can perform various works related to construction, logging and simple trimming of branches. If the tool is handled correctly, it will serve for a long time, but during operation, various malfunctions occur as a result of intense loads.

When minor breakdowns are detected, they do not contact service centers and workshops; routine repairs of Husqvarna chainsaws are carried out independently, and it is necessary to investigate and analyze the probable causes of defects and ways to eliminate them.

Why it won’t start and what to do

Among the malfunctions of the Husqvarna chainsaw are poor engine starting. The engine either cannot be started at all, or it starts poorly.

There is no clear answer to the question why the chainsaw won’t start. The main assembly unit of the tool is the engine. The following conditions affect the stability of operation:

fuel mixing;
air;
presence of a spark;
lubricant

Each factor is responsible for its own working unit:

for the fuel mixture - carburetor;
for air - a cleaning system, in particular an air filter;
for the spark - the ignition mechanism and spark plug;
lubrication - lubrication system and gasoline.

A common reason why chainsaws do not start is failure to follow the starting algorithm. The engine unit should only be started after all parts have been completely assembled:

The chain brake is always on. To avoid losing control of the instrument, you must not start in the air.

Starting the engine in a cold state is done as follows:

Place the tool on the ground, step on the back handle with your right foot, and place your left hand on the front handle.
The saw is in a stable state, the chain does not touch the ground.
With your right hand, take the starter handle and pull the cord, but do not twist it around your hand.
As soon as the first flash occurs, return the choke lever to its initial position, opening it, and repeat the start.
They gas it and let it go. The blocking is disabled.
The engine is switched to idle speed by quickly turning off the gas limiter.

Starting a warm engine is carried out in the same sequence, but without opening the damper.

If the start is made correctly, but the engine does not work, a possible reason is the lack of fuel in the tank, or the carburetor fuel chamber is not filled. Check the tank and chamber, fill them with the mixture.

If the ignition system malfunctions, inspect the spark plug and check for the presence of a spark at the electrodes. If it is wet (gasoline floods the spark plug) and a spark is not detected, the part is turned out, dried or replaced. If it is dry and there is a spark, then there is a problem in the fuel equipment - clogging, depressurization of the gas intake.

Magneto malfunctions are also confirmed by a weak spark. Despite the ignition operation, there may be no flash in the cylinder, while the spark plug removed from the cylinder is wet. The solution is to purge the cylinder with the carburetor flaps open.

The electrodes of the system are covered with soot or oily. This can be removed with a wire brush. The spark plug is washed and cleaned by allowing the gasoline to evaporate.

Violation of the gap between the side and central electrodes leads to a poor start. The normal interval is 0.6-0.7 mm. It is adjusted by hemming.

If the ceramic insulator surrounding the central spark plug or the current-carrying core of the wire is damaged, replace it.

If it starts and stalls

The Husqvarna chainsaw starts and stalls when you press the gas. This is caused by a clogged carburetor jet and a dirty fuel tank filter. The defect is eliminated as follows:

disconnect the fuel hose from the carburetor;
inspect the fluid leakage - the breather is clean if a full stream comes out.

The next reason why a chainsaw stalls is contamination of the muffler with exhaust resins. The issue can be resolved by cleaning.

Wear of piston rings affects the operation of the cylinder-piston group. If there is play during inspection, parts are replaced.

When starting the engine, the unit may also stall:

as a result of water entering the mixture;
due to poor chain lubrication;
oil wire leakage;
clogged channels.

Pay attention to the chain:

if dryness increases, clean the oil supply channels, inspect the elements connecting the fittings to the tubes;
If there is an oil leak at the connecting points or there are cracks in the tubes, they are sealed with sealant.

The engine does not develop speed:

if the piston rings burn in the grooves;
when the crankcase rubber seals wear out and lose elasticity;
leaks in the connection between the cylinder and the crankcase;
due to incorrect setting of the ignition timing;
as a result of contamination of the cylinder fins and fan grille;
under heavy load immediately after purchasing a new engine.

Video: Husqvarna 137 No Gasoline Fills Carburetor

The product is used for the following purposes:

felling of trees, their thickets and bushes;
clearing trunks of branches;
logging;
cutting wood, boards and logs into blanks;
selection of grooves in lumber;
installation of wooden products of specified sizes;
woodcarving, crafts and sculpture;
cleaning up garbage in the forest;
dismantling of wooden buildings.

device

The product has a classic design for products in its class. Manufacturers have embodied simplicity and sufficiency.

Husqvarna 137 chainsaw structure:

home;
hold hands;
mechanical starter;
internal combustion engine;
chain brake lever;
oil and fuel tanks;
throttle, throttle and throttle control levers;
ignition button;
muffler;
stars;
pollen chain.

The fuel supply system and clutch are installed inside the housing.

Carburetor

The device is responsible for supplying a mixture of fuel and oil to the cylinder. The carburetor is equipped with a diaphragm and a special needle valve. These parts regulate the pressure in the system. Dosing of the supplied air is carried out by two dampers located in the diffuser chamber. One regulates the air volume when the throttle lever is pressed, and the other regulates the flow when the tool cold starts. At this moment, the damper partially closes and the rich mixture enters the engine.

After mixing gasoline and oil, the fuel is supplied to the cylinder through an injector with a check valve. This is an important part of preventing exhaust gases from entering the diffuser.

The chain for the Husqvarna 137 chainsaw is different:

The drills are equipped with chamfers that provide high-quality cutting of hardwood.

Saw chain characteristics:

link thickness. 1.3 mm;
chain pitch. 3/8 inch;
tire length. 40 cm;
Number of links. 56.

The product uses chamfer technology. The tension is adjusted using a screwdriver by turning the adjusting screw. Sharpening is done with a round file with a diameter of 4 mm. An alternative is to use a grinder or a service center.

Characteristics

The parameters of the chainsaw compare favorably with similar light-class products.

Technical characteristics of the tool:

type. gasoline, carburetor;
engine power. 1.64 kW (2.2 hp);
fuel tank capacity. 0.41 l;
oil tank volume. 0.20 l;
engine capacity. 36.3 cm;
number of links in the chain. 55;
sizes. 250x420x260 mm;
noise level at full speed. 107 dB;
weight without clothes. 4.9 kg;
tire length. 40 cm;

How to dilute gasoline for a Husqvarna chainsaw

For productive work and increased service life at high power, maintain the proportion of oil and gasoline for the chainsaw, measuring the ratio of the ingredients of the fuel mixture with a measuring tank. When preparing even a small quantity, small inaccuracies affect the quality of the fuel.

For dilution, use high-quality gasoline with a minimum octane number - RON 90. If the parameter is less than recommended, the engine begins to knock, which leads to overheating and increased load on the bearings. When constantly operating at high speeds, choose gasoline with an increased rating.

It is recommended to use 2-stroke oil.

To properly dilute gasoline for a chainsaw, use the following mixing scheme:

for engines with a cylinder displacement of up to 80 cm³ - 1:50 (2%), i.e. 5 liters of gasoline - 0.10 liters of oil;
for engines with a volume above 80 cm³ - 1:33 (3%), i.e. 5 liters of gasoline - 0.15 liters of oil.

Is there fuel in the tank and what is its quality?

Checking the presence of fuel in the tank is the first place to start diagnosing. Even if there is visually still fuel in the tank, make sure that the fuel line is lowered into it. If the fuel in the tank is low, then this is the main reason why it is impossible to start the engine. After adding fuel to the tank, it is necessary to bleed the system, and only after that carry out a test run of the engine.

If there is enough fuel in the tank, make sure that the supply hose inside the tank is not disconnected. On some models of chainsaws, such a malfunction is a “disease”. If the tank is full, this does not mean that the breakdown is not related to the fuel system. Check the quality of the fuel (oil and gasoline). Gasoline for chainsaws is mainly used of the AI-92 grade. As an oil, you need to use only a special two-stroke oil, but not motor oil or even waste oil.

The prepared fuel mixture cannot be stored for more than 2 weeks, as the mixture begins to lose its properties, which negatively affects not only the operation of the engine, but also its starting. How does a poor-quality mixture affect engine starting, you ask? Everything is very simple, when the mixture is stored for a long time, oil precipitates, which leads to clogging of the carburetor channels and jets.

The instructions for each brand of chainsaw indicate recommendations on the ratio of gasoline to oil. This is the recommendation that should be followed when preparing a mixture for a two-stroke chainsaw engine, otherwise it will significantly shorten the service life of your tool.

This is interesting!
You can tell the quality of the fuel by the color of the carbon deposits on the spark plugs.

Starter repair

The starter is responsible for starting the unit. Malfunctions indicate the presence of the following malfunctions:

the spring burst;
the pulley is damaged;
The starting cable is damaged.

Sequence of actions for replacing a worn starter cord:

the starter is disassembled, the mechanism is removed, having first unscrewed the screws securing the housing to the engine crankcase;
the cord is pulled out at a distance of 30 cm through the hole in the pulley;
the return spring is set to the neutral position;
the central screw is unscrewed and the pulley itself is removed;
a new cord is inserted, tensioned, while 3 turns are wound around the mechanism and secured with a screw;
the cord is then pulled through a groove in the starter housing and handle.

The return spring is tensioned by rotating 2 turns clockwise, taking into account that it is compressed. When replacing a broken part, the spring should pop out after pulling the inner part down.

Break-in rules

Running in a chainsaw does not last long at XX. Therefore, after starting the engine, you need to idle for about 5 minutes, then start sawing trees with a diameter of no more than 10 cm at medium speed.

The technological process is carried out according to a cyclic scheme:

1.5 minutes with minimum load;
20 seconds on XX without it.

After operating for the first 25 hours, the unit can reach full power; all rubbing parts are worn in.

During this period, be sure to adhere to the following recommendations:

do not overheat the power plant;
do not work for a long time at XX;
do not load as much as possible;
suppress long-term slipping of the clutch.

After final running-in, the following work is carried out:

inspection of the crank mechanism;
cleaning carbon deposits on all parts;
checking fasteners;
assembly;
preparation of a flammable mixture;
adjusting the carburetor to maximum power under load.

The saw chain also needs running in

Attention is paid to its lubrication and tension. The part is tensioned so that it can be rotated freely by hand

Lubrication is carried out by immersion in oil. Then the chain is run at idle for 3-5 minutes. The engine is stopped, the chain cools down and only then the tension is checked.

This video discusses the breakdown of the ignition coil, its replacement and starting the chainsaw

. And also look at mine.

Why is the chain not lubricated?

Oil does not flow to the saw set as a result of a malfunction in the chain lubrication system. The reasons for this are as follows:

presence of defects in the oil pump;
clogging of the filter, channels;
breather defects;
oil hose rupture;
mismatch of the oil hole on the saw body and the bar;
drive gear malfunction.

Dismantling and disassembling parts will allow you to correct identified defects and eliminate them by replacing them with new ones.

The oil pump is responsible for increasing or decreasing the oil supply and is located on the right side of the chainsaw. Leaking or contamination may result in insufficient lubrication. It is removed after the clutch is released.

The oil supply to the chain is adjusted by adjusting the oil pump.

How to remove and replace the drive sprocket

The chain moves along the bus by a drive sprocket, which is connected to the gearbox. It is an assembly unit that rotates due to a bearing. At the end of the tire there is a driven sprocket with the same pitch relative to the drive one. Therefore, when carrying out repair work, all factors are taken into account: the alignment of the splines, the presence of bearings, and the kinematics of the tool.

When the spline wears out, the drive sprocket is replaced, otherwise traction with the chain will not occur.

In order to change a part, you must perform the following steps:

unscrew the nuts of the tire cover and remove the headset using working tools;
remove the air filter;
unscrew the saw spark plug;
remove the clutch on the chainsaw;
inspect the drum and check the crown;
remove the chainsaw sprocket;
if necessary, replace the broken part with a new one;
Reassemble all parts in reverse order.

If the process of replacing a sprocket on a Husqvarna chainsaw is difficult, use the services of a specialist.

Actions if a malfunction is detected in various parts of the unit

Such unpleasant phenomena as loss of power, lack of connection, and idle support are common. The reasons for this behavior of the tool are malfunctions of the chainsaw carburetor. This is expressed in contamination with particles of dust and sawdust. Such a breakdown can be easily repaired on its own.

The carburetor is cleaned using:

a small amount of gasoline;
Phillips screwdriver;
brushes;
heads, size 8.

To begin repairing the carburetor, they begin by cleaning it from dirt and dust particles and small wood. A brush is used for this. When the surface is completely free of debris, the repairman removes the cover, and then the filter.

The air collector is released after unscrewing the air filter mounts. The user now has access to the accelerator and rods. The accelerator lever is removed as soon as the throttle is lowered by pressing down with your finger.

The carburetor moves away from its seat after the choke lever is removed and closed. Then the wire is removed and pulled towards itself to stop the engine. The plastic lever, which is the place where the wire is attached, is photographed.

It is raised from the left. As a result, the carburetor is freed, which makes it possible to pull it out and clean it. For these purposes, it is convenient to use a compressor. In its absence, the parts are washed in clean gasoline.

Disassembling a Stihl chainsaw – video

Important! When repairing a poorly functioning Stil MS 180, be sure to inspect the condition of the fuel filter. Remove it and blow out the fuel hose

The saw carburetor assembly process is carried out in reverse order. If, after this process, smoke appears from the muffler and the saw engine does not start well, then you need to make sure that there is a spring located under the lever needle.

The spring cuts off the fuel supply. In its absence, a spontaneous “overflow” of fuel into the spark plug occurs.

It is important to ensure that the spring is installed in its place and make sure that the spark plug is working

If a candle is filled with gasoline, it should be dried. To do this, the part is unscrewed and the excess fuel that gets inside is drained through the existing hole. The candle takes more than half an hour to dry. Then it is installed in place, and the chainsaw is brought into working condition.

Insufficient contact between the high-voltage wire and the end of the spark plug can also be one of the reasons for tool failure. Repair of stihl chainsaw parts can be done by replacing problematic parts.

For example, if a spark plug fails, it is replaced with a reliable one. Chains, sprockets, and tires are subject to rapid wear. They solve anti-vibration problems in the chainsaw device, so they are replaced urgently. It is recommended to keep such spare parts in stock.

Possible malfunctions of the Husqvarna 137 chainsaw

Sometimes a person may encounter some breakdowns of the Husqvarna 137 chainsaw , which can be eliminated. Today there are a large number of workshops where specialists repair and maintain equipment. But you will have to pay a considerable amount for this work.

repair of the Husqvarna 137 saw without contacting specialists. When the damage is minor, there is no point in going to the workshop and wasting your time. There is a list of the most common problems that the owner of such equipment may encounter. That is why it is advisable to familiarize yourself with them so that you are always fully prepared.

What to do if the chainsaw does not start

Good afternoon, dear readers who are not subscribers to my blog! At one inopportune moment, you may discover that your chainsaw will not start. But do not rush to immediately hand over the tool for repair; you may not be able to fix this breakdown yourself without any problems. I will tell you what to do when the chainsaw does not start, and how to find the right solution to this problem.

We analyze the possible causes of failure

Find out why the tool does not start, of course, in the instructions itself. But it is rare that instructions are available at home.

Although each model has its own characteristics, unfortunately, in the end our client remains similar. Therefore, I will tell you the possible causes of the breakdown and possible ways to eliminate them for different tools.

Causes of ignition system failure

If the Husqvarna saw stops working , then first of all you need to check the spark plug for functionality. This must be done very carefully using a specially designed hook. The first step is to disconnect the wires from the body and look at the appearance of the candle.

If the spark plug is dry, this indicates that fuel is no longer entering the main cylinder. In this case, the fault is not in the spark plug, so you can safely screw it back in.
When there is fuel spatter on this part, the main problem is in the carburetor. This indicates that it was incorrectly adjusted or the starting rule was violated.

To fix this problem in a chainsaw, it is recommended to thoroughly wipe the spark plug , turn off the fuel supply and turn on the starter. This procedure is performed in order to thoroughly ventilate the combustion chamber and eliminate excess fuel. After this, the spark plug can be installed in its original place and the Husqvarna 137 chainsaw can be started.

When a candle is covered with heavy carbon deposits, this indicates the use of low-quality oil. In order for the chainsaw to serve for a long time, it is necessary to buy only tested and certified lubricants. Sometimes users incorrectly calculate the ratio of oil and gasoline, and also set the carburetor to inaccurate adjustments.

In this case, it is recommended to pay attention to the presence of a spark during startup . To do this, an ignition cable is installed on the spark plug, the cylinder and nut are connected. Now you can start the chainsaw starter and then a spark appears. If it is still missing, then you should replace the old spark plug with a new one. In rare cases, users will come to look for a faulty high voltage drive or troubleshoot a connection problem.

Fuel supply system

If chainsaw is used incorrectly, fuel does not enter the main cylinder. This malfunction occurs for several reasons:

dirty saw fuel filter;
viscous chain oil;
clogging of the special hole;
dirty air filter.

To clean the fuel hose of a chainsaw, you must carefully check the fuel supply. Experts recommend replacing the old hose every three months and buying a new part. If the air hose is dirty, air does not flow into the system, namely the carburetor. Most often this leads to disruption of engine operation. The filter can be cleaned using ordinary water, but this procedure must be done very carefully.

Muffler failure

If at low speeds the saw engine runs without interruptions , and when they increase, it stalls, then the problem is related to the muffler. This indicates a faulty spark arrester. Most likely, it is clogged with combustion waste. To perform cleaning, the first step is to remove and disassemble the muffler. Next, the user carefully removes the resulting carbon deposits using detergent.

After this, experts recommend drying the part with a hairdryer. After completing all the manipulations, you can install the muffler in its original place.

saw has a simple design , so a large number of faults can be fixed at home. To do this, you should carefully study the breakdown and read the instructions. There are rules for disassembling and installing parts. The Husqvarna 137 saw is distinguished by its reliability and sufficient power. She copes with even the most complex tasks and performs a large amount of work. That is why the presented chainsaw is widely used in large-scale industrial enterprises.

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Summing up

Undoubtedly, a chainsaw occupies an important place in the daily life of each of us, especially when the need arises to carry out certain work in the garden. Rating of chainsaws by quality View here.

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

First of all, what I would like to draw your attention to is that this kind of tool will serve you well for various types of manipulations related to sawing wood, collecting firewood and gardening.

Malfunctions of the Husqvarna 137 chainsaw are not so rare, but the specifics of its design allow you to cope with most of them yourself! Find out how to choose a chainsaw video here.

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