Does Not Keep Idle Trimmer
Diagnostics and elimination of problems of gas engines
Before proceeding with the repair of a particular unit (part), it is necessary to determine the nature of the malfunction. Step-by-step diagnostics and troubleshooting. more.
In case of problems with the candle, it is sometimes enough to dry it or clean it with sandpaper and put it back in place, setting the gap correctly. it should be 1 mm. If the spark plug is heavily soaked, it is better to replace it with a new one. With optimal trimmer operation, the candles do not fail so often.
The functioning of the fuel system is of great importance for the trouble-free operation of the petrol trimmer. Gasoline passes through all its assemblies and parts, so they must be cleaned regularly. In addition, only high quality fuel must be used. To prepare a combustible mixture in a two-stroke engine, motor vehicle oil cannot be used, since it has insufficient qualities.
Causes of low trimmer speed
If users complain about the trim tab that does not pick up speed, it means that it works fine at idle, and when you press the gas, it does not develop the necessary power. This can occur as a result of a long idle device without activity. These problems are typical for gasoline vehicles, including Husqvarna 128r, Stihl FS 38 and Hitachi of various modifications.
When working with the trimmer, you need to monitor its behavior all the time. a drop in rpm and unusual noises signal a malfunction in the unit. Sometimes you give the gas, and the trimmer floats. In such cases, work should be immediately suspended, the mechanism should be allowed to cool down, and the search for possible problems should be started. They can be of a different nature, both a technological plan and external factors associated with the conditions and features of the operation of the apparatus.
This mechanism is an important part of the petrol trimmer. In order for the carburetor to work properly, several conditions must be met:
- Disassemble and clean it from time to time;
- Adjust the idle speed according to the instructions;
- Refer to the help of the wizard when adjusting.
In the event of a breakdown of this unit, you can do its repair yourself, but only if you have certain knowledge.
One of the reasons for poor carburetor performance is a loose cable. To eliminate the problem, you first need to disassemble the entire assembly, and then, after thoroughly washing all the parts, lubricate and tighten the cable, but not very much, so as not to stretch.
The trimmer does not gain momentum. what to do
Any person who owns a summer cottage or land plot is well aware of the problems of dealing with excess vegetation. Now a trimmer has come to the rescue, which has successfully replaced the usual braid in this field. This unit is very convenient in operation, but it, like any mechanism, tends to fail due to difficult working conditions or incorrect operation. It is quite common for the trimmer to not pick up speed. To understand this problem, it is necessary to understand some aspects related to the operation of the apparatus.
Features of the trimmer
All trimmers are classified by type of power: gasoline or electricity (mains or battery). It should be noted that gasoline mowers are superior in many respects to their electric and battery counterparts. While they all perform similar functions, the differences in performance, agility and efficiency are very noticeable. However, the general principle of operation of all types of hand-held mowers is almost the same. the machines are equipped with motors (two- or four-stroke internal combustion engines or electric motors) that drive the cutting unit (a spool with a fishing line or a metal disc). All elements are fixed to a straight or curved bar, including a trimmer handle, on which the main buttons are located.
Since the problem of low revs is more common with petrol trim options, they will receive more attention. So, the lawn mower is very comfortable to work and unpretentious in maintenance. over, most of its malfunctions are caused by the user’s ignorance of elementary things, which are written about in the instructions. Therefore, before starting to operate the unit, you must carefully study the manufacturer’s manual. In particular, to start the engine, the following steps must be taken:
- Turn on the ignition button;
- Press the silicone button several times to pump gasoline;
- Close the air damper;
- Set the throttle lever to the high rpm position;
- First, make light jerks with the starter handle to feel the resistance of the engine, then jerk sharply.
If the lawn mower starts up but stalls, set the choke to the middle position and try again. When the engine starts working, you need to slow down the gas and open the air damper, since the trimmer functions only on suction.
Technical problems with lawn mowers mainly occur in the fuel supply and ignition systems. You can deal with them yourself.
- When the hand mower won’t start or stalls, the problem could be with the spark plug. Dark carbon deposits indicate poor carburetor adjustment and poor gasoline quality.
- A clogged fuel hose may be the cause of the trimmer not working correctly. Filters are also often clogged.
- Another internal problem. the muffler is covered with carbon deposits. From this, the trimmer speed drops sharply. Exit. you need to clean the muffler.
A clogged air filter is another reason for the unreliable operation of the device. To check the involvement of this element in the malfunction, you need to start the lawn mower without it. A dirty filter can be washed in gasoline, dried or replaced with a new one.
A clogged fuel filter does not allow fuel to enter the cylinder, and the engine stalls at full throttle due to an elementary shortage of gasoline. This element is located inside the tank on the intake hose. To fix the problem, instead of the old filter, put a new one on the hose or thoroughly rinse the one that was removed.
Why the chainsaw isn’t picking up steam?
In cases in which the used gasoline saw is not able to steadily gain momentum and stalls spontaneously when you press the accelerator, you will need to carefully check the engine crankcase and carburetor. First and foremost, the operator should carefully inspect the assemblies to ensure they are not sealed. If a large amount of oil was found inside the crankcase or carburetor, then the leak inside the faulty unit must be repaired.
The next reason why the chainsaw does not develop speed. A manufacturing defect or mechanical damage to the breather located inside the fuel tank is used. A vacuum can form in the fuel tank, which leads to a lack of fuel supply to the working cylinder of the power unit. Deposits that have accumulated on the surface of the fuel cylinder can also cause this problem. In this case, you need to remove the filter element and rinse it in clean gasoline. If after that the chainsaw continues to stall under load. So you need to perform the following procedure: turn off the power unit of the chainsaw, remove the fuel tank cap and tighten it again. If after that the motor of the gas-powered tool starts to gain momentum and after 5 minutes of operation it stalls again, then the cause of the breakdown is a faulty breather.
A thick layer of carbon deposits on the walls of a factory muffler is another common cause of a saw motor not rotating. Resinous deposits and ash will prevent exhaust gases from escaping, which will lead them back to the engine compartment. As a result, the engine will begin to emit extraneous sounds and greatly lose speed even with a slight press on the accelerator.
What to do if the chainsaw is gaining momentum by itself?
This malfunction is typical for novice gardeners who ignore the need for timely maintenance of their gas powered tools. In the case of an arbitrary set of revolutions with a chainsaw, the cause must be sought in the carburetor. First of all, it will need to be completely disassembled. After making sure that all the built-in parts are in good working order, you can start flushing the fuel unit. For this you need:
- Place all carburetor parts in a container of clean gasoline. After knocking, the parts must be removed, rinsed thoroughly with water and dried;
- The fuel pipes must be blown out with compressed air from a cylinder. Immediately before re-installing the hoses in the places where they are connected to the fittings, you will need to apply silicone sealant;
- After installing the carburetor, the chainsaw must be re-adjusted. Before that, you need to make sure that the power unit is in good condition, as well as the filters, rubber gaskets and bushings are in working order.
In some cases, the cause of an arbitrary set of revolutions with a chainsaw may be a loss of sealing of the crankshaft oil seal. Due to constant contact with the moving shaft, the stuffing box lends itself to increased heating, which leads to the formation of cracks and holes inside it. A damaged gasket cannot be repaired, so it must be replaced.
Often the cause of air leakage, due to which an arbitrary set of revolutions by the motor occurs, is the loss of fixation of the bolted connections. In this case, the operator will need to tighten all the bolts and check the operation of the gas tool again.
Does not idle the chainsaw
The serviceability and efficiency of household and professional chainsaws largely depend on the degree of wear and tear of their main operating mechanisms. Several factors indicate damage to the working units of the gasoline tool, the main of which is the speed of the running engine. Their arbitrary growth or decrease can prompt the operator about a breakdown of the carburetor, violation of the clutch clearance and other malfunctions. this will allow you to identify any of the breakdowns in time and fix it on your own.
The chainsaw does not slow down. how to find and fix a breakdown?
The most common cause of this frequent breakdown is an incorrectly adjusted damper. It is needed to suck in the air that the carburetor needs to enrich the fuel mixture with air. To adjust the choke, you need to adjust the carburetor operation. In this case, special attention should be paid to the operation of the power unit at idle. You can check the operation of the engine in idle mode by paying attention to the state of the circuit immediately after starting the engine. If it rotates, then you need to adjust the power unit.
Another reason for this typical malfunction is air leaks. If air leaks in one of the chainsaw mechanisms, the mixture will automatically deplete, which will lead to a spontaneous increase in the speed of the chainsaw motor. In this case, the operator will need to carefully check the entire fuel system, including the carburetor, pipes, and working chambers of the unit.
In some cases, the chainsaw will not slow down due to a jammed accelerator cable. In this case, the power unit will independently gain momentum to the maximum immediately after it is started. Disassembling the gas handle and inspecting the entire gas supply mechanism will help solve the problem. A jammed cable will need to be adjusted or completely replaced.
The chainsaw does not idle. search for reasons and repair
There can be several reasons for this common breakdown. Basically, the loss of speed when the internal combustion engine is idling is associated with engine malfunctions, loss of compression in its standard cylinder, ignition system, carburetor, as well as improperly prepared fuel mixture. In search of the exact cause of a breakdown, the operator may encounter the following problems:
- Accumulation of resinous deposits and ash, small debris on the air and fuel filters of the chainsaw. if possible, the elements must be washed. If, in addition to blockages, cracks or holes were found on the surface of the filters, then the foam elements will need to be completely replaced;
- Spark plug defect. cracks, chips or burrs interfere with the work of the part, which leads to a loss of engine speed when the engine is idling. In this case, the candle will need to be replaced;
- Loss of factory settings of the carburetor. increased pressure on the power unit leads to an increase in its vibration. As a result, the spring-loaded metal bolts of the fuel assembly lose their original position, which leads to a loss of engine speed;
- Cracks and holes in the fuel pipe. to repair the chainsaw, the hose must be replaced;
- Clogging of the inner walls of the muffler. dismantling, thorough flushing and reinstalling the muffler will help solve the problem. If large burrs have formed on the internal cavities of the element, then it will soon begin to rust. To prevent this, it is better to replace the muffler immediately;
- Malfunction of the power unit CPG. the appearance of microcracks or burrs on the inner surface of the cylinder and piston will lead to loss of tightness of the working chambers. As a result, the amount of air required to enrich the fuel mixture will be disrupted. this will result in a loss of engine speed when idling.
The stable operation of a chainsaw engine largely depends on the quality and proportion in which the fuel mixture is prepared. An excess or a lack of oil will lead to a gradual deterioration in the performance of the power unit and over time it will not be able to work even at idle speed. To prevent this, you must strictly adhere to the ratio of gasoline and oil, which is indicated in the instructions for the chainsaw used.
High engine idle speed: injector
RPM and operation of the motor at XX actually means that air is supplied to the engine bypassing the throttle valve. In other words, at idle, the specified damper is closed. Note that normal idle speed for different units is about 650-950 rpm. In parallel with this, a frequent malfunction is that on a warm engine, the speed of XX is kept at around 1500 rpm and higher. This indicator is a sign of a malfunction that should be eliminated.
It should also be noted such a phenomenon when the idle speed “floats”, that is, for example, it rises to 1800 rpm, after which it decreases to 750 and then rises again. Very often, increased speed XX and floating speed are the result of the same breakdowns. Let’s take a look at a petrol injector unit as an example. In such an internal combustion engine, the engine speed depends on the amount of intake air. It turns out that the more the throttle valve opens, the more air enters the intake manifold. Then the ECU determines the amount of incoming air, simultaneously takes into account the throttle opening angle (throttle position) and a number of other parameters, and then supplies the corresponding amount of gasoline.
Another case is when the engine keeps idling speed of about 1500-1900 rpm, while it runs smoothly, the speed does not float. In this case, it can be assumed that the injector delivers so much fuel in the XX mode that it is enough to operate at such high rpm. In other words, there is a waste of fuel. These features may be characteristic of some engines and absent on others, since there is a dependence on the device of a specific injection system (units with an air flow meter, engines with a pressure sensor in the intake manifold). It is obvious that air leaks are a common cause of an increase in engine speed or floating speed at XX.
Now let’s figure out where excess air can flow into the intake. You should look for a problem in four main directions:
- Throttle valve;
- Channel XX;
- Device for maintaining “warming up” revolutions;
- Servo motor for forced speed increase XX;
As for the first case, the throttle valve is controlled by the gas pedal. At idle speed, the engine should run without pressing the accelerator. It should be borne in mind that on many cars the gas pedal is mechanical, that is, it is connected to the valve opening mechanism with an ordinary cable. If this cable is soured, kinked or overtightened, as well as problems with the mechanism itself, then the banal effect of pressing the gas pedal may take place. In this case, the engine will keep at increased revs, since the ECU believes that the driver is pressing the accelerator and the damper is slightly open.
In the second case, excess air can pass through the idle channel. Such a channel is available on the overwhelming majority of injection internal combustion engines. The specified air channel bypasses the throttle valve and is called the idle channel. In the implementation of the circuit there is a special adjusting screw. Using this screw, you can change the channel cross-section, thereby increasing or decreasing the amount of air entering the motor and adjust the speed of XX.
As a result, the ECU calculates the amount of air, reduces the amount of fuel supplied and the speed decreases. If the motor is cold, this channel is initially open. In this case, the ECU receives readings from the temperature sensor and enriches the fuel mixture. Problems with speed can arise both as a result of the failure of this device, and after malfunctions of the temperature sensor.
The list is completed by a special servo device. an idle speed regulator, which is installed in a separate air channel. This solution is capable of forcibly increasing idle speed. In various schemes, this can be an electric motor, a solenoid, a variant of a solenoid valve, etc. The main task of such a regulator is to ensure the smooth transition of the engine to the XX mode after releasing the gas pedal. In other words, the engine does not decelerate sharply after closing the throttle, but gradually. Another function of the device is to increase the idle speed at the moment the engine is started, and then smoothly decrease it to the required one. The regulator also raises the speed after increasing the load on the internal combustion engine in idle mode (turning on the air conditioner, heated seats or mirrors, high or low beam headlights, side lights, etc.). Failure of this device will naturally entail an increase or swimming in idle speed.
Increased speed of XX on engines with a carburetor
At the very beginning, we note that the increase in XX revolutions on carburetor engines is often associated with the metering device itself. If high idle speed is noted in the case of a carburetor engine, then there may be several reasons.
- The first reason is the knocked down idle speed adjustment. This adjustment is carried out using an adjusting screw, which allows you to enrich or lean the mixture. To solve the problem, you should correctly adjust the idle speed on the carburetor.
- You should also pay attention to the fact that the air damper may not fully open on carburetor cars.
- Another place to look at is the carburetor’s first chamber damper. The specified damper may not close completely due to defects in the damper itself or an incorrectly adjusted actuator.
- Finally, we add that a noticeable increase in the fuel level can be observed in the carburetor float chamber, which also leads to an increase in idle speed.
Increased idle speed: causes
The idle speed (XX) is the operating mode of the internal combustion engine, which is necessary to maintain the combustion process in the cylinders at a minimum level, that is, so that the engine continues to work and does not stall. On different engines, the idle speed may differ, and also depend on the temperature of the internal combustion engine. In the case of an increase in the indicated speed of XX, the engine begins to consume more fuel, the exhaust in this mode becomes more toxic. A decrease in idle speed leads to unstable operation of the power unit, as well as to the fact that the engine starts to stall after releasing the gas pedal. In this article we will talk about what may be the reason for high idle speed, why high idle speed on a warm engine is found on many cars, and also consider the main methods of diagnosing this malfunction.
What is the result
It should be noted that the problem of idling on an engine with an injector is diagnosed by checking the main systems that are responsible for the flow of air into the internal combustion engine, as well as changing the composition of the mixture, taking into account the amount of incoming air. It turns out that it should be borne in mind that the failure of individual ECM sensors can lead to an increase or floating speed of XX.
Problems on the classic and front-wheel drive “Zhiguli
In the meantime, there is no need to know about it. ”
On such cars, the engine stalls at idle speed quite often. If the engine is carbureted, then this is usually the case. It can get clogged, or the idle jet, which is responsible for the normal operation of the engine at idle speed, is clogged.
It is necessary to pull out the jet and blow it through, then rinse with solvent. If this does not help, then you can check the solenoid valve.
To control it, you need to turn on the ignition and disconnect the wire from it. Then reconnect. A click should be heard. If it is not there, then it is necessary to measure the voltage on this wire. If the control lamp is on, then the valve must be changed. If it is not possible to purchase a valve, then you can still travel a lot if you use a simple method. The valve needle just needs to be broken off. This will slightly increase fuel consumption, but then you will reach your destination.
Injection “Zhiguli” have similar faults: breakage of sensors. Occasionally, the electronic unit fails, which can be found on auto-analysis.
The engine starts for a long time and immediately stalls
It often happens that the engine does not slow down when the gas is released, or, conversely, stops at idle. Most of these situations are due to the fact that the throttle valve of the car engine is faulty, that is, it is jammed or clogged.
Such a situation may appear due to a long drive on poor gasoline, which is enough in our country, as well as from dirty air sucked into the engine through a filter.
To identify the cause, you need to pay attention to the constant contamination of the oil trap in the ventilation system of the engine crankcase, since over time it will surely become dirty. If it is clogged with dirt, then the engine chokes with crankcase gases, as a result, idle speed drops and the engine stops. Therefore, it is necessary to periodically flush the crankcase ventilation filter.
Is the carburetor to blame
If the engine is carbureted, then 90% of such malfunctions arise from the carburetor. The most common cause is clogging. Therefore, cleaning and flushing the carburetor is a periodic maintenance.
Any microscopic speck that somehow passed through the filters can seriously complicate the operation of the engine and create many problems for both novice drivers and professionals.
Reasons for stopping the engine at idle
Usually, whenever the engine does not idle, the cause is contamination of parts or some kind of malfunction. The main reasons for engine shutdown can be:
- Pollution of the ventilation system of the engine crankcase.
- Air sensor malfunction, throttle valve.
- Dirty filters, petrol pump.
- Clogged injector, carburettor channels, throttle valve.
- Clogged idle jet.
- Breakage of the idle speed regulator.
Why is the carburetor dirty?
The main enemy of the carburetor is poor fuel. It can contain a large amount of various debris that can appear in the fuel already in the car. For example, this can come from sediment at the bottom of the gasoline tank. Sediment rises when you fill up your car at a gas station.
Many cars have a fuel filter in front of the carburetor, but it needs to be changed periodically, as over time it clogs up and no longer cleans the fuel. The fuel pump also has a fine mesh that can clog up and cause the engine to stop.
Aging of rubber hoses and other parts in the fuel system is a hazard in the path of gasoline from the tank to the combustion chamber. Such parts must be replaced in time, as they lose their reliability after a few years. Externally, rubber cracks, but inside the walls of the hoses are destroyed under the influence of chemicals contained in the fuel. Destruction products move along the channels to the engine.
The membrane of a gasoline pump is often destroyed. Before it breaks down, it can clog the fuel channels with pieces that have been separated from it as a result of destruction.
Why does the engine not keep idling?
If the engine does not keep idling, this does not mean that the car cannot be repaired. This problem is often encountered by drivers of various brands of cars, from old “Zhiguli” cars to modern cars of foreign production. The engine may stall while idling for no apparent reason.
Even if the car after that began to work normally, as if nothing had happened, then such a problem must be solved urgently. There can be a great many reasons for this behavior of the engine. Let’s consider the main of these reasons.
If engine stalls then starts normally
The reason for this may be poor-quality firmware of the electronic unit of the motor. This happens when the car is self-tuning. As a result, the car gives good dynamics at high revs, and stalls at idle. This is solved by flashing the electronic unit to the factory version of the firmware.
But usually such problems arise due to the instability of the functioning of some sensors. For example, throttle sensor, air sensor. The idle speed control can also cause the engine to stall at idle speed. All of these parts need to be checked periodically with diagnostic equipment. Better to have a backup set of the aforementioned sensors with you. Their cost is low.
Why does the injection motor stall
The direct injection system is more complex than the carburetor system. Therefore, if replacing the sensors does not give results, then it is better to contact a car repair shop. The reason may be insufficient tightness of the intake manifold. In this case, you should check the vacuum hoses, sealing rings of injectors, gaskets, vacuum booster, manifold plugs. The place of air leakage is easy to determine with a smoke generator. He’s probably at the service station. Be sure to check the pressure in the fuel rail.
In systems equipped with a pressure regulator, the best indicator is 2.5 atmospheres at idle. Systems with a pressure regulator in the tank should have a pressure of about 4 atmospheres. You should also check the ignition system, as well as the candles.
Diesel engine stalls at idle
In such a power unit, the most likely cause is a high pressure pump. There are several types of problems. Due to a poor quality or old fuel filter, the system is clogged. Air leaks may appear, or the plungers are out of order.
Diesel car owners often find the cause in the fuel tank mesh. When it becomes clogged, the engine stalls when there is still half the fuel tank. Nozzles may clog, glow plugs may fail.
Why stalls at idle
The first and most common cause of this malfunction is improper carburetor adjustment. You can adjust the idle speed yourself, for this you need to have a Stihl adjusting screwdriver, which is supplied with the unit. The adjustment hole is located on the right side of the Stihl 180 saw on the handle and is marked with “-” and “”.
Why Trimmer Stalls When Idling
Prerequisites why the machine does not idle
Idling adjustment on the injector
If the Stihl chainsaw does not keep revving and stalls at idle, you can be almost 90% sure that it has irregularities in the fuel pump operation system, as a rule, it is air leaks into the crankcase through the oil pan gasket, or, much more often, through the oil seals crankshaft. Air leaks reduce or completely stop the impulse that is fed through special channels to the fuel pump of the chainsaw. As a result, the Stihl 180 chainsaw does not receive the required amount of fuel and stalls at idle.
Diagnostics can be carried out using a special device called a vacuum gauge.
The second way to check the performance of the oil seals is to pour gasoline into the crankcase and look at them, if the oil seals let gasoline pass, then they cannot provide normal pressure in the crankcase, which will make idle work impossible. And when operating at high speeds, with leaking oil seals, there is a possibility of seizure of the crankshaft bearings.
The algorithm for checking the crankcase and Stihl 180 oil seals for leaks is as follows:
- The top cover is removed.
- Dismantle the air filter housing and carburetor.
- The handle of the chainsaw is removed.
- The starter spins and retracts.
- On the opposite side from the starter, the side cover and the drive sprocket are removed.
- A piston stopper is installed in the spark plug hole or a string from the old starter with knots imposed on it is stuffed into the cylinder.
- The flywheel and clutch are unscrewed, after which the parts are removed. It is worth knowing that the chainsaw clutch has a left-hand thread and unscrews clockwise.
- The gear wheel of the drive of the oil pump is removed.
Having disassembled the Stihl MS 180 chainsaw, you can see the oil seals, then you need to fill the crankcase with gasoline and check the leakage. The crankcase can be filled through the fuel window in the cylinder; for this, the piston must be raised as high as possible. If leaks are found, it is necessary to replace the defective oil seals, or re-seal the pallet. You can collect Stihl 180 following the reverse sequence of the algorithm.
Why The Trimmer Does Not Work At Idling EVDIRAL.RU
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When purchasing a lawn mower, you need to be prepared for the fact that, like in all other similar tools, breakdowns may appear in it that will require repair.
But you should not immediately run to the service center and pay big money to the masters who convince you of the presence of a severe malfunction in the device.
Trimmer BLUNTS carburetor adjustment.
Even more information about repair and selection of tools on our website www.Looktool.Ru visit we are glad to everyone.
Immediately after winding up
The unit may stall immediately after starting if the carburetor is misaligned or incorrectly adjusted. this causes uneven fuel supply. The result of this is that the device vibrates distinctly. For troubleshooting, the carburetor is reconfigured, following the instructions for the mechanism.
Also, the engine stops when the fuel supply valve becomes clogged. In such cases, it is sufficient to simply clean it. If the lawn mower first started working, but then immediately stalled, then the fuel may enter the carburetor unit with some difficulty. Weakening the valve helps to resolve the issue, which ensures free circulation of the mixture in the system.
The stoppage can also be caused by air leaks in the presence of mechanical damage to the hose (holes, cracks) that takes the fuel. In this case, add more revolutions to the drive in order to quickly expel air bubbles from the system.
Trimmer Deaf For Idle Reasons
Prerequisites why the machine does not idle
Idling adjustment on the injector
Why does the chainsaw stall when you press the gas
Let’s say the chainsaw works normally at idle, but when the gas is pressed sharply, it stalls. What could be the reason? It is immediately clear that the point is not about the ignition (no spark), since if the ignition is faulty and there is no spark, the tool would simply not start. Means the fuel system remains.
There are quite a few defects in the fuel system, and in order to determine a clear prerequisite for which the Stihl 180 chainsaw stalls when you press the gas, you need to carry out its full diagnostics. We advise you to read about the common malfunctions of the Stihl 180 chainsaw and their elimination.
If the Stihl MC 180 chainsaw stalls at idle, does not gain power when you press the gas, or even stalls at full speed, it is necessary to diagnose the fuel system and check the crankcase for leaks. You can do it yourself, but you need to have certain skills. If you are not familiar with two-stroke saws, it is better to turn to specialists, since this technique is rather capricious and any mistakes are expensive.