Chainsaw Stihl 361 do-it-yourself repair

In detail: chainsaw Stihl 361 do-it-yourself repair from a real master for the site my.housecope.com.

Question: I use a Stihl MS 361 chainsaw. Tell me, are 3/8 (1.6) ring sprockets suitable for 3/8 (1.3) chains? Won't a low profile chain dangle on a big sprocket?

Answer: For a crown, or in other words, an annular sprocket, in interaction with the chain, the main parameter is the pitch, and the thickness of the drive link can be any from 1.1 mm to 1.6 mm. The main thing is that the pitch of the chain and the drive sprocket be the same.

If you paid attention, the crown itself has some freedom of movement along the axis of rotation. This is done to make the chain run smoother, reducing the vibration caused by the moving chain.

If the chain shanks could also “hang out” from one side wall of the sprocket to the other, of course, if there was a normal chain tension, then this would be a boon, on the contrary, the resource of the sprocket would increase, because its teeth would wear out evenly over its entire surface.

It usually happens quite the opposite, the chain shanks choose one place on the teeth and, in the process of operation, the chainsaws begin to “cut” this place slowly, in especially neglected cases or if there is a poor quality sprocket, sawing the sprocket into two halves.

Question: how is it better to start and warm up the Stihl 361 chainsaw in the cold?

Answer: 1. I usually set the lever to the down position and pull until the first flash.

2. I put the lever in the middle position (half gas), I start it.

3. As soon as the engine starts at half gas (the chain rotates), I stand it for about 5 seconds and only after that do I regas. When it's warm, I do a regassing immediately after starting.

Video (click to play).

Question: The Stihl MS 361 chainsaw does not obey the carburetor adjustment. What is the reason?

Answer: There may be several reasons. Air suction is possible.

Question: Is it necessary to use an 8 tooth motor sprocket for ripping with a Stihl 361 chainsaw with a timmerjig?

Answer: It is not necessary, but it is better to install an 8 tooth sprocket. Need to change the saw chain! The saw tooth of the chain must be sharpened at an angle of 10 degrees!

There is no spark on the Stihl 361 chainsaw, how to check the ignition performance, what should be the gap between the flywheel and the coil?

Visual inspection: 1) Wires visually look normal (without melting, etc.); 2) The flywheel is not “blue”, the gap is 0.2 mm .; 3) It is better to put a new candle. If there is still no spark, then you can say with 90% certainty that the problem is with the ignition module.

Question: Can you please tell me what the “N” symbol on the box of the STIHL 361 chainsaw means, although there is no such symbol on the saw itself?

Answer: The letter “N” on the box of the Stihl MS 361 chainsaw means that the chainsaw is assembled with a cylinder gasket 1 mm thick, especially for Russia, anticipating the poor quality of gasoline in our country. For models sold in Europe, a 0.5 mm spacer is installed.

When working with a Stihl 361 saw, it abruptly began to gain high speed, and did not react to the trigger. I turned it off and now it won't start.

There is a spark, after pulling the starter 20-30 times the candle is dry. I cleaned the carburetor, washed it, but the fuel still does not flow (a full tank of gasoline).

I disconnected the hose from the carburetor, gasoline does not flow - I also cleaned the breather in the tank from it. The filter on the intake is clean - the result is zero. I filled it in a little - it started up with half a turn and died out, we have no service. How to fix?

according to the symptoms, there is an air leak somewhere, I can only say that the malfunction is quite serious and it will not be possible to fix it myself. Do not torture the saw, it is better to unscrew the muffler and see what condition the piston is in, if it is smooth, then everything is fine, if the longitudinal stripes are bad.

Question: The clutch in the Stihl MS 361 chainsaw slips due to oil and dirt. How to remove the clutch yourself to clean the entire basket?

Answer: Pull off the lock washer with a screwdriver, remove the sprocket, now to twist the clutch you need to lock the piston, to do this, remove the back cover, top cover, unscrew the spark plug, insert the stopper into the spark plug hole, turn the clutch until the rotation stops and unscrew the clutch (clutch on the left carving).

Question: There was a problem with the Stihl MS 361 chainsaw. Maybe someone has come across it and can help with advice.

Bottom line: the saw starts up fine, while it is cold, it rumbles evenly, but after several cuts, when it apparently warms up, the idle speed starts to float, and as a result, after 10 seconds, the saw stalls at idle.

If you give it gas, you can cut further, as before, there seems to be no loss of power, but without regassing at idle, it stalls again.

I removed the cover and checked the air filter, it was clogged with dust, but in my opinion it was not critical, it let air through, and eventually replaced it with a new one.

The situation has not changed. He took off the candle, the candle was black, dry, wiped it, checked the spark, everything seems to be normal. Nothing has changed in the operation of the chainsaw, it stalls at idle as before.

Replaced the spark plug with a new one, same result. I began to sin on fuel, made a new mixture on new gasoline, the result is the same. Starts like new, but idling, no way. Gasoline 92, Shtilev HP oil.

The oil was bought from a dealer, the packaging is original. He didn’t seem to allow overheating, he worked for 15-20 minutes, he spared the saw, he fired half a tank at a time, or even less. The chain was sharpened once a day, or even more often. In general, what do you recommend?

Answer: To begin with, turn the Stihl 361 chainsaw carburetor adjustment screw half a turn to the right clockwise. But, most likely, nothing more will be needed.

If it turns out that the chain is moving at idle, then you can gradually turn it in the opposite direction. Ideally, there should be stable operation and a stationary chain.

However, for a particular instance of the saw, it is quite possible that at the lowest possible idle speed, at which the engine is still running stably, the chain will “twitch” on the tire from time to time.

If this happens to your saw, you don’t need to be scared, but you don’t need to forget about this feature either.

Question: During prolonged hard work, the inner element of the muffler frays its body and broken pieces can get into the cylinder.

This appears to be due to overheating. Can anything be done about it? I try to tighten the muffler when loosening the studs.

Answer: They have such a problem - with silencers. I experimented, on several saws (of those that periodically get into maintenance) I did not put a gasket under the muffler. And it seemed that the mufflers did not fall apart much longer.

Specifications chainsaw Stihl MS 361

Displacement: 59.0 cm3
Int. cylinder diameter: 47mm
Stroke: 34mm
Power: 3.4 kW (4.6 hp)
Idling speed: 2800 rpm

Magneto with electronic control
Spark plug: Bosch WSR 6F, NGK BPMR 7A
Gap between electrodes 0.5mm

Diaphragm carburetor with integrated fuel pump
Fuel tank volume: 0.685 l

Speed-dependent automatic oil pump with swivel piston – additionally manual oil flow adjustment. Oil tank volume: 0.325 l

Cutting set

Rollomatic guide rails

Cutting lengths (3/8″ step): 37, 40, 45, 50 cm
Groove width: 1.6mm

Rapid Micro (36RM) Series 3652
Rapid Micro (36 RM3) Series 3664
Rapid Super (36 RS) Series 3621
Rapid Super (36 RS3) Series 3626
Pitch: 3/8″ (9.32mm)
Lead thickness. links: 1.6mm

7 teeth for 3/8″
Max. chain speed - 27.5 m/s

Home page » Stihl 361 Chainsaw Carburetor Adjustment

A chainsaw is an indispensable tool, both in household plots and at their summer cottage. But even the most reliable “iron” assistant starts to mope, then it doesn’t start, then it stalls. There can be a huge number of circumstances, both related to the quality of the fuel consistency and to the engine.

There are a lot of aspects, we will not consider all of them in this article. And we will “take a closer look” at that part of the engine, which is called the carburetor.And we will try to find the answer to the following questions: when do you need to adjust the chainsaw carburetor and, in fact, what is the scheme for such adjustment.

Before proceeding with the adjustment, you should know the device and mechanism of the carburetor. This will help to avoid many "complications". So, for starters, let's recall the mechanism of operation of a gasoline engine. There is fuel in the cylinder, when burned, a small “explosion” is created, which makes a huge pressure. This pressure pushes the piston, the piston, having set in motion, turns the crankshaft. As a result, the pressure energy is converted into torque, which sets the chain in motion by means of an asterisk.

During normal operation of the engine in each cycle, it burns only up to 10 milligrams of fuel. And the fuel mixture is prepared and supplied in the carburetor.

Thus, the purpose of the carburetor is to combine the combustible mixture with air in the right proportions. If these proportions are violated, the operation of the motor is disrupted. For example, when mixing, not much fuel enters, but on the contrary, there is a lot of air, then such a mixture is called “poor”. Conversely, if there is not enough air, and on the contrary, there is a lot of fuel, then this is a supersaturated mixture. Both options lead to failures in the normal operation of the motor and require adjustment.

The carburetor consists of the following basic parts, and although the design may differ depending on the model, the device and mechanism of operation are approximately the same:

the base of the carburetor is a tube resembling a wind tunnel in its features; air flow enters through it; - an air damper is placed across the tube, by its position it either increases the air flow or reduces it;
the tube has a constriction - a diffuser, which increases the speed of the air flow just in the place where the fuel supply hole is located;
the fuel itself enters the air channel from the atomizer, it enters it through the jet from the float chamber (indicated in the photo as a fuel needle);
the float chamber itself serves as a typical reservoir, the purpose of which is to ensure a constant level of fuel at the inlet to the air channel.

The mechanism of operation of the carburetor is as follows. A frisky stream of air flows through the air channel, its speed will also depend on the position of the damper. The float level provides the degree of opening of the fuel supply channel and depends on the position of the same air damper. The air flow, passing through the diffuser, picks up the incoming fuel, sprays it. At this moment, the mixture appears, which is sucked through the intake pipe into the cylinder.

In the float chamber, the pressure level is approximately equal to atmospheric, but in the air channel it is rarefied. Due to the pressure difference, the fuel is sucked through the jet into the air channel. The more the air damper is open, the greater the air flow, and, accordingly, more fuel enters. More fuel - engine speed increases.

This is how a carburetor works. There may be aspects in its structure, but knowing how a simple carburetor works, you can always understand and find the purpose of other parts.

In general, the need to adjust the carburetor of the Stihl chainsaw, or any other brand, appears quite rarely. Signs of a misaligned carburetor are indicated by:

the engine starts and stalls, or does not start - in this case, the prerequisite may be a "poor" fuel mixture;
fuel consumption has increased significantly and there has been an increase in the amount of exhaust gases (fuel does not completely burn out) - a supersaturated mixture may be a prerequisite.

Parts Repair Stihl chainsaws ms 361.Carburetor adjustment.

In this video we will answer the question of how to set up or adjust chainsaw carburetor do it yourselfBy itself, the adjustment goes astray in very rare cases, namely:

when the fixation of the adjusting screws was broken, there are only three of them. The reason may be vibration or damage to the protective cap.This is a rather rare case if no one has touched the screws.

in case of significant wear of the engine, namely the piston. Then the factory settings are not suitable. In this case, adjusting the carburetor of a Patriot chainsaw, or another model, can save the day for a while. But here it’s time to think more about repairing the engine than adjusting the carburetor of a Husqvarna chainsaw or the like;

the cause may be due to the formation of a blockage in the carburetor, the cause may be poor quality gasoline, damaged air filter or scale. In this embodiment, in addition to adjustment, it is necessary to disassemble and flush the carburetor.

Although quite rare, it may still be necessary to adjust the carburetor. We note right away that not everything can be done on your own, except to have a tachometer and at least once see with your own eyes how to do it correctly.

To adjust the carburetor of the Makita chainsaw, like most other models, there are three adjusting screws. Although some manufacturers carefully removed two of them, leaving only one for the user to experiment. So, three screws, on the carburetor body they are marked with the following letters:

L - with the help of this screw, low engine speeds are adjusted;
H - high speed adjustment;
T - to adjust the idle speed (it is left for experiments).

In general, the carburetors have already been adjusted by the manufacturer for optimal operation, and the screws are designed for more precise adjustment of the carburetor of the Champion chainsaw and others, in difficult climatic conditions, such as high mountains, etc. Since the air is thinner there, finer tuning is required for the tool to work. Under normal circumstances, this is not necessary.

To adjust the carburetor of the Goodluck chainsaw, as well as other brands, two screws L and H are used to create the appropriate quality of the fuel mixture. To create a lean mixture, the screws are turned clockwise, this allows you to increase the number of revolutions, i.e. thus, set high speeds. Accordingly, when turning the screws counterclockwise, the mixture is more saturated, this regulates the low number of engine revolutions. Thus, when adjusting the carburetor of the Partner chainsaw, by turning the screws clockwise, we increase the number of revolutions, counterclockwise - decrease.

For any adjustment of the carburetor of a Chinese chainsaw or another, a number of requirements must be observed:

fine adjustment is always carried out when the engine is warm (engine operation for at least 10 minutes);
the condition of the air filter must be satisfactory, i.e. clean and not clogged;
when the chain is rotated with the help of the adjusting screw T, it is necessary to achieve its complete stop, for this the screw is turned counterclockwise.

And do not forget about our own safety, the chain should be directed in the opposite direction to us, the saw should stand securely on a flat surface and not touch any objects with the cutting part. With fine adjustment, the screws are adjusted in the following sequence L - H - T. Photo and video. and carburetor adjustment. Chainsaw Stihl 361 uses. Using screw L, it is necessary to “find” the maximum number of engine revolutions. To do this, turn the screw clockwise, or in the opposite direction, until we “feel” the maximum. This is where you need a tachometer, or a sensitive ear for music, and you should know the sound of the maximum engine speed, if you overdo it, especially with the H regulator, the engine will fail. Repair will cost a pretty penny, so we strongly recommend entrusting such work to a professional.

If you have a tachometer and know the maximum number of revolutions of your engine, then you can, at your own peril and risk, try to complete the adjustment.It will look something like this: we find the closest speed value with the L regulator, then we return the same regulators counterclockwise by a quarter of the turn of the screw. We leave and go to the regulator H, and if it is over-tightened, the engine will fail.

We turn this regulator ¼ turn of the screw counterclockwise (we warm up the engine before this). We carefully listen or focus on the tachometer. If the sound is our ideal, when the engine is at its maximum, it works like a four-stroke engine. If the mixture is too rich, the sound is screeching. You can try to achieve an average value, not have an ideal, but remove the screeching sound with a screw. And if the work of the saw suits you, it is better to leave it as it is, it is better than being left without an engine.

If it was possible to more or less adjust the screws L and H, then there was a little left - to adjust the idle speed. The ideal here is to ensure that the motor runs evenly in all positions until the chain begins to move. Turn this screw counterclockwise until the chain stops. If this cannot be achieved, the help of a specialist is needed. An unadjusted chainsaw is a very dangerous thing.

A well and properly adjusted carburetor is:

the chain is idling "stands";
the engine accelerates quickly;
The engine works like a four-stroke engine.

Below is a video of chainsaw carburetor adjustment

With all the variety of modern building materials, wood remains very relevant. Therefore, lumberjacks, landscaping workers, summer residents are interested in woodworking tools, including chainsaws.

The Stihl chainsaw is easy to operate, inexpensive, reliable, and has a long service life.

Different people prefer different brands. Someone is interested in the Partner chainsaw, someone is interested in the Stihl device, someone else is something else. But they all break down from time to time, and their breakdowns are both similar to one another and different. Next, consider the repair of the Stihl chainsaw with your own hands.

This brand is well known both among professionals and among individuals involved in the arrangement of their own living space. The great popularity of the Stihl chainsaw determines the frequent practical use of this tool and forces us to look for ways to effectively deal with its typical breakdowns.

The design of the chainsaw Stihl.

Before you start disassembling a faulty mechanism, you should prepare the appropriate tools. Since the chainsaw is a technically relatively simple device, this list is small and includes:

Screwdriver Set;
spanners;
set of socket wrenches;
needle.

In order to carry out a full-fledged high-quality restoration of the working condition of the Stihl chainsaw with your own hands, it is necessary to accurately establish the causes of the breakdown. Since the specified chainsaw refers to mechanisms driven by an internal combustion engine, the main malfunctions are associated with this particular unit.

The most common Stihl chainsaws in operation are the following malfunctions:

lack of engine start;
unstable operation of the internal combustion engine immediately after start-up, as a result of which, after a short operation, the power unit spontaneously turns off;
a running engine does not reach full power;
oil is leaking.

Stihl chainsaw carburetor device

One of the frequent breakdowns of the saw device is also a break in the working chain. But it does not apply to problems that arise during the operation of the propulsion system. Usually repairing a broken chain comes down to replacing it with a new one.

The search for a malfunction that led to the failure of the chainsaw is carried out in the following order. First of all, the level of gasoline in the tank is checked. If everything is in order with the level, you should proceed to inspect the starting device. If the trigger does not show signs of failure, you need to pay attention to the spark plug.

If, as a result of a thorough inspection and verification of the correct gap, it is established that the candle is in perfect working order, then the carburetor may be the cause of the malfunctions that force the chainsaw to be repaired. This often happens due to the fact that this device is trite clogged.

However, if the old candle is replaced with a new one, the carburetor is completely cleaned, and the chainsaw still does not start or, having earned it, quickly stalls, then the faulty cylinder-piston group (CPG) may be to blame. In order to qualitatively check the entire group, you will have to spend some time, almost completely disassembling the specified system. In this case, the technical condition of the cylinder, piston and piston rings is checked.

And now we will consider each malfunction in a little more detail.

As mentioned earlier, the examination of a faulty sawing tool must begin with establishing the presence of gasoline in the fuel tank, as well as determining the technical condition of the breather.

Chainsaw repair Stihl in case of a malfunction of the fuel supply system.

When checking the fuel level, it is imperative to open the gas tank cap. This must be done even if the owner of the tool is sure that there is gasoline in the tank.

Often the saw cannot start due to the lack of fuel in the combustion chamber. The reason for this is most often an ordinary clogging of the breather - a special bypass valve that serves to equalize the pressure in the tank with a gradual consumption of gasoline. In this case, repairing a chainsaw comes down to carefully cleaning the breather with an ordinary sewing needle.

The reason for the failure of the entire tool may be an inoperative trigger mechanism or problems in the ignition system. If it turns out that the starting device is operating normally, then you need to make sure that the candle is working. In order to do this, the candle is turned out of the socket and carefully examined, paying attention to the presence of foreign deposits on its electrodes.

Chainsaw starter device.

It is worth noting that the presence of traces of a certain property at the place of formation of a spark speaks very eloquently about the sources of the "disease" of the entire starting system. Such a source, in particular, can be a carburetor. So, the complete absence of any signs of fuel on the candle (its complete dryness) most likely indicates the failure of the fuel to pass into the combustion chamber due to the complete clogging of the carburetor.

If gasoline is fixed on the chainsaw spark plug, and the cutting device itself does not work normally, then this indicates an excess of air-fuel mixture. The reason for this condition, perhaps, is a failure in the adjustments of the carburetor, clogging of its jets, as well as an incorrect start of the mechanism. In the case of fixing a characteristic soot on the candle, one can speak with sufficient confidence about the incorrect functioning of the carburetor or the use of low-quality gasoline.

With all the above signs reflected on the spark plug, it is necessary to remove the carburetor and check its technical condition. If clogging is detected, the carburetor should be thoroughly cleaned, then the device should be adjusted according to technological requirements and the gasoline used in the tank should be replaced. At the same time, it must always be remembered that the carburetor is a rather complex assembly, consisting of many small components, parts and tubules. Therefore, its repair must be carried out with extreme care and accuracy.

In addition to restoring the carburetor, it is necessary to check the performance of the spark plug itself on the stand and, if necessary, set the correct gap in it. If you do not like the candle and its work at all, it is recommended to replace it with a new candle.Sometimes the engine of the tool does not start or runs with obvious interruptions and without reaching the rated and maximum power due to a malfunction of the cylinder-piston group.In this case, do-it-yourself chainsaw repair is carried out in the following sequence.4 bolts are unscrewed on the cylinder head, after which the cylinder is removed from the block. The piston is carefully checked for the presence of chips, scratches, scuffs. Their presence is unacceptable and entails the replacement of the piston. At the same time, there should not be the slightest mechanical damage on the cylinder itself. It can either be repaired by boring the mirror to the repair size of the piston, or replaced with a new one assembled with the piston.