Stihl 361 Gets Turnover
Chainsaw is considered by many as an ideal and indispensable helper. After all, with its help you can perform all the work that the ax previously helped to do, while not spending a lot of time and effort. That is why almost every home craftsman has such an tool in his arsenal.
The design of the units under consideration is not so complicated. And this means that every craftsman can fix the tool, taking into account the advice of specialists. We will consider in what sequence the adjustment of the Husqvarna 236 carburetor is done with your own hands.
First of all, it is worthwhile to figure out which screws for adjustment are provided in the Husqvarna 236 chainsaw.
The manufacturer equipped the model in question with 3 screws:
- L-screw adjustable nozzle at low speeds;
- The N-screw adjusts the jet at high speeds;
- T-screw is used to adjust idle speed.
If it is necessary to adjust the supply of fuel, lubricant mixture and air access, the first 2 elements are activated. By turning them clockwise, the mixture manages to be leaner and slower. Performing actions in the reverse order, that is, unscrewing the elements in the opposite direction, the mixture is enriched and the speed increases.
Idling is configured by the third element. Turning it clockwise, the revolutions increase, and to reduce them, the screw is simply rotated in the opposite direction.
Experts recommend that you independently adjust the carburetor in the model in question, adhering to the following plan:
- First of all, you need to adjust 1 screw, then proceed to the second and only in the last turn do the adjustment of the screw responsible for idling.
- Next, you need to determine what are the largest idle speeds. To do this, gently turn 1 screw clockwise. Having found the largest indicator, the element should be turned на turn counterclockwise. If during this operation the chain continues to rotate while idling, screw T must be slowly turned counterclockwise until the chain stops rotating.
- Using screw N for adjustment, it is possible to actually change both the power of the unit and its speed. However, it should be borne in mind that if the carburetor works for a long time due to the ordinary mixture and at high speeds, this can cause a chainsaw to fail.
- To carry out the adjustment of screw H, the following steps must be taken:
- warm up the engine of the unit for 15-20 seconds by selecting the full speed mode;
- ¼ turn the H element counterclockwise;
- leave the engine in working condition for 10-15 seconds;
- using a tachometer to analyze what is the indicator of maximum speed;
- if the received data do not coincide with the passport data, the process should be repeated again.
The four-stroke sound of the engine will help to understand that the adjustment is made correctly. If the mixture becomes too lean after adjustment, the unit will make a screeching sound. If the mixture is too saturated, smoke will appear from the muffler. If in the arsenal of home craftsmen there is a device called a tachometer, then you can begin to independently adjust the H-screw. In other circumstances, it is better to seek help from specialists.
- After the first elements are adjusted, you can do the adjustment of the idle screw, performing the operation in the following sequence:
- having activated the engine, you should carefully start to turn the screw T clockwise;
- it is necessary to rotate the element until the unit chain begins to rotate;
- in the next step, you need to start turning the screw in the opposite direction to stop the rotating movements of the chain.
To understand that it was possible to correctly establish the number of idle revolutions will help uniform operation of the engine, in any direction, with the necessary margin of revolutions, during chain rotation.
The above instructions for adjusting the Husqvarna 236 carburetor will greatly simplify the progress of work. But if any stage nevertheless causes difficulties, everyone can find a hint by visiting an online resource and watching a video tutorial on this topic.
It is possible to understand independently that the work was done correctly, the operation of the engine, which should instantly accelerate and produce a four-stroke sound at full throttle, will succeed. If the unit starts up with difficulty, the engine cannot accelerate immediately, re-adjust the first screw to enrich the lean mixture.
Chainsaw. a tool that is useful in any country house, even for lovers, not to mention professional workers. But, like any other device, a chainsaw needs constant care and prevention. One of the most common procedures is to adjust the carburetor of the chainsaw due to incorrect settings in the past.
The first signs of a carb malfunction
Due to the untimely or unprofessional periodic maintenance of the chainsaw, as well as due to the heavy load, difficulties in its operation may arise from time to time. For professional workers, such breakdowns can reduce their work efficiency and ruin their mood for the whole day.
Carburetor malfunctions, in turn, have specific symptoms. From them, you can immediately determine the cause of the breakdown.
The following signs indicate incorrect carburetor settings:
- The tool starts up problematically, after which it immediately stalls.
- The chainsaw stalls when you press the gas.
- Gasoline is consumed in large quantities, and it still remains in the cylinders and does not burn out until the end, and the exhaust is excessively thick.
- The carburettor settings set at the manufacturer’s factory are lost due to improper use or self-adjustment.
- Debris has entered the air intake system. Because of this, she failed.
- Engine pistons used up. Setting the carburetor in this case only temporarily solves the problem.
In the event that dirt has got into the carburetor, one setting is indispensable. Here you just need to clean it. When the pistons are used up, an overhaul of the engine is required.
But after that, of course, you need to configure the carburetor jets, as well as blowing and cleaning them.
The purpose of the carburetor is to prepare the working mixture for feeding it into the engine cylinders. This mixture is gasoline and air in the proportions necessary for the operation of the engine. If this ratio is violated, the engine will not work clearly. When the mixture has a lot of gasoline, then it is called unprofessional terminology as saturated, and if, on the contrary, it is small, then poor. But in any case, a failure in the proportions of the working mixture will have a bad effect on performance.
Different models of chainsaws may have different designs of carburetors, but by the principle of action they are all identical. Air through a special channel moves at a speed that can be adjusted by closing or opening the damper. Gasoline, in turn, enters the carburetor through the jets and mixes with air there, creating a special mixture that enters the engine.
The pressure in the float compartment of the carburetor, where gas is before mixing, is close to atmospheric. When you open the damper, the air becomes larger, as well as gasoline, due to which the engine speed increases. In this case, a vacuum is created in the air channel and gasoline is drawn into the air stream. This is the principle of the carburetor.
In order for the chainsaw to work smoothly and efficiently, and also without a lot of fuel consumption, its carburetor must be adjusted accordingly. Before such work, you must first check the air and gas filter. If dirt is found on them, they should be replaced.
Chainsaw tuning for most models, as a rule, is carried out with the help of three screws. high and low revs and idle.
The following signs should indicate proper configuration:
Video: Stihl 361 Gets Turnover
- The chain should not idle.
- The motor runs smoothly.
- At the start, there should also be no breaks in the work.
Do-it-yourself carburetor repair of the chainsaw should be done very carefully, because any mistake made can lead to serious consequences, even before the engine breaks down completely. If there is not enough experience, then it is better to seek the help of a specialist.
Husqvarna chainsaw adjustment
During the break-in period of the Husqvarna 142, 240, 236, 137 chainsaw and other similar models, the carburetor settings are set in such a way that the engine speed is 600-700 less than ordinary workers. In the case when it is not possible to adjust the operating frequency by the tachometer, it is not recommended to reset the factory settings with the screw H.
The manufacturer categorically prohibits exceeding independently the working number of turns. When, after setting the carburetor, the chain of the chainsaw moves at idle, it is necessary to stop it by turning the screw T counterclockwise.
In order to fine-tune the saw, it must be installed on a flat surface with the tire forward. You also need to warm up the engine for at least 12-15 minutes. First, determine the highest idle frequency. To do this, in the chainsaw screw L must be turned clockwise, and then in the opposite direction. After determining the desired frequency, the same screw rotates counterclockwise from 12 to 25% of its full revolution.
Idling in the models of this manufacturer is configured using a jet with the letter T. The setting is made by turning it clockwise until the chain moves. After that, turn easily counterclockwise until the chain stops moving.
The screw H of the chainsaw is adjusted correctly only when the saw does not make a lot of noise when the gas is pressed to the end, and at the same time it does not weigh down with any load.
In the event that the saw is too noisy during operation and smokes, then this nozzle must be turned from left to right to adjust.
Saws Stihl and Partner
In the Stihl 250, 361 chainsaws, as well as the Partner 351, 350, the carburetor is adjusted using the N and L screws by setting the proportions of gasoline and air. If you let them go, then a large part of the fuel will be added and therefore the speed will be high, otherwise, on the contrary, they will fall.
Idling revolutions in partner chainsaws are regulated using a screw with the letter T, and in Shtil, as a rule, you need to look for the marking of the aircraft. The standard setting of the chainsaw is carried out during the final tests. Basically, after such settings, the percentage of fuel in the working mixture is more than air, which does not correspond to the optimal parameters. But they must be preserved in the first hours of operation during the break-in of the device. After that, the saw can be adjusted independently, but it will work well at the factory settings.
But if it is decided to regulate independently, then actions must be performed in the following sequence:
- screw adjustment L;
- then set the jet N;
- then proceed to idle adjustment using the T screw (if the Stihl chainsaw is LA).
First screw L must be twisted in both directions in order to find the maximum engine speed. If that point is found, then turn the same screw by ¼, thereby slowing down a bit. If at the same time the circuit continues to idle, it is necessary to immediately turn the screw T (LA) until the chain stops completely.
After setting the maximum speed with the screw H, it is necessary to check the frequency with a tachometer. In the event that it does not match those indicated in the service book, the setting must be repeated. When a lot of smoke comes out at the maximum speed from the exhaust pipe, the mixture is too rich in fuel, if you hear noises and the engine heats up very much, on the contrary it is poor. Then you need to adjust the idle speed. With proper tuning, the engine should sound at low revs and the chain should not move.
The carburetor adjustment of the Chinese chainsaw, for example, Carver, is carried out in almost the same way as the factory models. There are the same three main adjusting screws L, H, T. Sometimes such models have the ability to adjust idle speed. But as a rule, employees of specialized services and owners of such saws claim that setting up a quality Chinese chainsaw is not always possible immediately.
For classic Chinese models, screw L should be loosened 1.5 turns from the maximum value. Screw H must be loosened one revolution from the maximum. Idle turns are regulated in the same way.
Thus, self-adjusting the chainsaw carburetor is not a very complicated process and can in most cases be self-taught.
Chainsaw carburetor adjustment in Husqvarna
Husqvarna chainsaw (Husqvarna) 137. Carburetor adjustment.
The best advice I can give you. this is to turn to specialists! Believe me, there is very little money, specialists will set up a carburetor, check the general condition of the saw. But if it is still necessary carburetor adjustment on a saw Husqvarna 137 I will try to describe this process in detail. A video on how to adjust carburetor chainsaw at idle.
Adjustment and carburetor adjustment Husqvarna 137
In the picture above, you see three screws for adjustment. Each of them has its own goal:
To adjust the idle speed, screw T is required.
Screw L is used to adjust low speed.
Screw H adjusts high speed.
First screw L (turning it), we are looking for the highest speed at idle. After we found them, you need to turn this screw a quarter of a turn against the clock. If the chain continues to rotate in this position, then we turn the screw T to stop it.
Then warm up the engine at full speed for 10-15 seconds and turn screw H a quarter against the hour. We wait 10 seconds and listen. the engine should work like a 4-stroke sound. If a squeal is heard, then the mixture is bad (we twist the screw), if the enriched mixture is smoky (tighten the screw).
After adjusting the low and high speeds, set the idle speed using the T screw. This is done as follows:
1. The engine should work
2. Turn screw T clockwise until the chain starts to rotate.
3. Turn the screw to the other side until the chain stops.
Read the same
With a properly tuned carburetor, your chainsaw quickly picks up speed and sounds like 4-stroke engines.
Remember to adjust the tachometer and experience correctly. Therefore, it is better to contact a specialized service!
Do-it-yourself carburetor adjustment on a chainsaw
Adjusting the carburetor of the chainsaw ensures efficient operation of the tool at full power with economical fuel consumption. Adjustment must be made with a clean fuel and air filter. For adjustment, three screws are used: for maximum and minimum speed and idle.
The H and L screws adjust the gas-air mixture ratio determined by the opening of the throttle carburetor. When the screws are loosened, the mixture is enriched, and turns accordingly fall; when twisting, the mixture is depleted. revolutions increase.
The designation H refers to the maximum speed screw that controls the main jet, L. to the minimum speed screw that controls the idle jet. With screw S, the idle speed is precisely regulated. Sometimes, to facilitate adjustment, the number of carburetor adjusting screws available is reduced.
Setting the carburetor in two steps. main (factory settings) performed when the engine is off. and the finale, released on a running hot engine. The exact angular values should be taken from the operating instructions of the particular chainsaw. If the manufacturer’s instructions are not followed, the engine may be damaged.
How to properly adjust the carburetor on a Husqvarna chainsaw
How to tune the carburetor on a chainsaw Husqvarna Adjustment chainsaw carburetor using three THL screws.
Husqvarna 236 carburetor repair (repair kit replacement)
Repair Kit Replacement Husqvarna 236 chainsaw carburetor.
Basic carb adjustment.
The adjusting screws with maximum H and minimum rotation L slowly turn clockwise until they stop, then they turn 2 turns, other settings are possible
Check and adjustment of idling.
We find the largest idle speed, for this, slowly turn the screw L in different directions. After determining the maximum engine speed, turn screw L 1/4 turn counterclockwise. If the chain idles, turn screw T or (S) fully clockwise.
Check and adjust the maximum speed.
Changing the maximum number of revolutions is carried out by screw H. When it is wrapped (clockwise rotation), when turning, the revolutions increase. are decreasing. Chainsaw engines have a maximum rotation speed of 11,500 rpm. up to 15000 rpm A higher speed does not provide ignition, in addition, it becomes dangerous for the engine. The maximum speed can be determined by interruptions in the ignition. If they come, screw H is slightly turned counterclockwise.
If the engine is not tested for acceleration and maximum speed, the adjustment of the chainsaw cannot be considered complete.
Read the same
When the gas trigger is pressed smoothly, the engine must quickly and confidently turn from idle to maximum (from 2800 to 11500-15000 depending on the device). If rotation is slow, delayed, screw L should turn slowly counterclockwise, but no more than 1/8 turn.
After adjusting the acceleration and maximum speed, the saw must be checked again at idle. the engine must run stably, the chain must not move. Chainsaw setting should be repeated if this condition is not met, but with the exception of the main adjustment step.
Carburetor chain adjustment
The carburetors of most chainsaws have three screws for adjustment:
- L. jet screw for low speed adjustment
- HOUR. high speed propeller
- Screw. T from Partner and Husqvarna (near Stil Louisiana ) chainsaw adjustment idle
The H and L screws adjust the gas-air mixture ratio determined by the opening of the throttle carburetor. When the screws are loosened, the mixture is enriched and revolutions increase accordingly, with grinding, the mixture is depleted. revolutions are falling.
Screw T (LA) is used to adjust the idle speed. The main setup of the chainsaw is done at the factory at the end of the test. The carburetor is usually adjusted to deliver a richer (than optimal) fuel mixture. The factory setting should save the first hours of operation of the saw. Then (optional), the carburetor is tuned more precisely.
The adjustment starts with the idling set, to do this, turn the screw T (LA) counterclockwise, reaching a complete stop of the circuit with a stable engine speed.
For further fine-tuning, you need a tachometer, and it is best to trust specialists. especially since in most cases this may not be necessary.
Adjust the tool with screw L, then use screw H and end screw T (LA).
We find the largest idle speed, for this, slowly turn the screw L in different directions. After determining the maximum engine speed, turn screw L 1/4 turn counterclockwise. If the chain idles, turn screw T clockwise to the stop.
Screw H adjusts power and speed. Adjusting the carburetor to lean mixture leads to excessive speed, overheating of the engine and failure of the piston chain saw.
Preheat the chain saw engine for idle for at least 10 seconds and turn screw H 1/4 turn counterclockwise. Let the engine run for about 10 seconds. then check the maximum engine speed tachometer. If the maximum speed does not match the passport, the operation must be repeated. When the mixture is too rich, the muffler begins to smoke, when the saw is too lean, screeching and overheating.
Finish the adjustment by adjusting the idle speed, as already described above. The idle speed is set correctly if the engine runs smoothly at minimum speed and the chain does not rotate.
A carburetor can be considered adjusted if the engine accelerates quickly and sounds like a four-stroke operation with a full throttle.