Possible reasons for failure
The power unit of all chainsaws is a single-cylinder internal combustion engine. Devices of this type are characterized by such malfunctions as a violation inside the CYLINDER compression, a change in the ratio of the fuel mixture, incorrect operation of the ignition, poor-quality fuels and lubricants. The main problems in the operation of the power unit are as follows:
- The engine runs stably at minimum rpm, but stalls with increasing rpm
- Start-up occurs normally, and idle speed is unstable, stalls quickly
- DOES NOT start.
Chainsaw electronic ignition circuit.
Abnormal idling can be caused by various reasons. They can be divided into several positions:
- Reduced throughput of filters (gasoline and air)
- Abnormal operation of the ignition system:
- The carburetor settings have spontaneously changed
- Malfunction of fuel line elements
- Clogged Exhaust Ducts, Muffler
- Defects of the piston, cylinder, valves.
Repair should begin with an external inspection and checking the presence of fuel in the tank.
Checking the spark plug and ignition system
According to the manufacturers’ recommendations, the spark plug should be changed once a year, regardless of the intensity of the tool use. Failure to comply with THESE tips leads to a completely natural result: failures at idle speed, subsequent failure.
Typical defects in the ignition system are as follows:
Help the chainsaw stall
There is a Partner 738 chainsaw, it worked without problem the first couple of times, and after that the following began to happen to it, when you start it on a cold one, it immediately stalls, tightened the T bolt (idle), it starts up normally, BUT when it warms up, the chain starts to rotate even when I don’t take dust in my hand, at the same time you can hear that the revolutions in the saws are maximum))) Again I tightened the bolt T, reduced the speed of the XX, the saw idles for a couple of minutes and stalls, but on cold it does not start at all.
What to do if the chainsaw stalls at idle
- Possible reasons for failure
- Filter check and repair
- Checking the spark plug and ignition system
- Checking and repairing the carburetor
- Muffler inspection and repair
- Conclusion on the topic
The chainsaw stalls at idle speed: many owners of this tool face such a problem. By its structure, the saw was a rather simple tool. But there are times when it fails. The main problem in troubleshooting is determining the correct cause of the abnormal operation. Once the cause has been identified, fixing the defect is usually quite simple.
Chainsaw stalls at idle
Filter check and repair
The engine may run intermittently or stall if there is insufficient fuel or air. The reasons. Clogged air or fuel filter. To check the fuel filter, it is necessary to remove the gas hose from the carburetor fitting and direct it to a container. Then press several times to pump fuel. If the fuel is pumped normally, in clearly defined doses, without dirt, then the fuel filter is working properly. If the jet is weak or the fuel is NOT pumped at all. The filter needs to be replaced or cleaned if possible.
Fuel filter clogged with sawdust. One of the reasons for a chainsaw breakdown.
The device must be removed from the fuel tank (after draining all fuel from it). On most models, the fuel filter can be hooked out of the wire through the neck. If the filter design is collapsible and can be cleaned, it must be disassembled and washed in accordance with the manufacturer’s recommendations. Otherwise, change to a new filter.
Similar problems can arise when the air filter is clogged with dust, sawdust, or dirt. With an insufficient amount of air, the fuel mixture will be enriched, the fuel combustion process becomes difficult.
To check, remove the filter. When working, you need to take precautions so that dust does not get into the carburetor. The device must be cleaned and rinsed in warm water with the addition of detergent. After drying, if possible, blow out with compressed air of low pressure, install in place. If the chainsaw works fine, then the cause has been eliminated, if not. Need to look further.
With constant use of the tool, it is recommended to replace the filters of the fuel and air systems after 3 months.
Chainsaw stalls under load
If the chainsaw stalls under load, then the fuel system or a dirty air filter may be a prerequisite for that. Change the fuel with the correct gasoline / oil ratio or clean the air filter. Universal solutions to this problem. Incorrectly prepared mixture of low quality gasoline and, for example, engine oil. The main reason for the malfunctioning of the chainsaw, including in the case when it heats up and stalls.
Chainsaw stalls when tilted
When the chainsaw is horizontal, the fuel pipe lies at the bottom of the gas tank, but when the tool is tilted, the pipe is above the fuel mixture, i.e. In the air. This is precisely the reason that the chainsaw stalls on its side.
The chainsaw starts and stalls. Why?
There are several simple rules for the operation and maintenance of a chainsaw, the observance of which will allow you to maximize its service life. Preparing the correct fuel mixture, regularly cleaning filters and periodically replacing parts will save you from having to repair your tool for a long time. If it was not possible to avoid the breakdown, then you can figure out its cause completely independently. This applies to any brands of chainsaws, from more complex models. Husqvarna and Stihl and ending with the simplest models Makita and Patriot.
The chainsaw stalls immediately
What to do if the chainsaw stalls immediately after starting? First you need to check the presence of fuel in the gas tank. If its level is not enough, then it is necessary to prepare the fuel mixture in strict accordance with the ratio of gasoline and oil prescribed in the operating instructions. Gasoline must have the highest possible octane number, and the required brand of oil, as a rule, is indicated in the data sheet of the chainsaw.
Next, we check the spark plug, as well as the contact of its tip with the high-voltage wire. The gap between them should be no more than 0.5 mm. If necessary, the candle is cleaned of carbon deposits and dried. It is recommended to occasionally change the candle to a completely new one. The reasons for the tool stalling when you press the gas lie in the fuel filter or carburetor jet. Cleaning the gas filter will NOT take much time and effort, but it is better to entrust the disassembly and cleaning of the carburetor to the specialists of the service center.
Chainsaw stalls at idle speed
Cases are common when the chainsaw stalls at idle. First of all, you need to check the muffler, and, in case of contamination, clean it from exhaust tar deposits. Also on carburetors. Some models, etc. There are bolts marked with H and L. Accordingly rough and fine tuning. By adjusting the bolt L during the operation of the chainsaw in such a way that its speed increases (the bolt is only turned half a turn), it is possible to eliminate this problem. Adjusting the carburetor requires an electronic tachometer and is a rather time-consuming process. That is why, in such cases, it is better to turn to professionals.
The chainsaw stalls at high speeds
In the event that the tool stalls at high rpm, there are three parts to check: the air filter, the fuel pump and the gasoline filter. The air filter must be cleaned, you can even wash it under water and dry it thoroughly. Then it is enough to disconnect the fuel hose from the carburetor and see if fuel flows out of it or not. If it flows with a full stream, the petrol filter need not be checked. If, on the contrary, the fault has been found. The breather can be cleaned with a regular needle, and the filter can be carefully disconnected from the suction hose, cleaned or replaced with a new one. The petrol pump is checked for wear: if fuel does NOT seep through it, then everything is fine with it. If the problem that your tool stalls at full speed is due to some damage to the pump, then this part just needs to be replaced with a new one.
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Repair and service of garden equipment.
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Tools and materials
Chainsaw two-stroke engine diagram.
The design of the mechanical units of chainsaws is characterized by good reliability and maintainability. Almost all units and parts have free access. With the necessary equipment, they can be easily removed for repair or replacement. To disassemble and check the life support systems of the chainsaw engine, you should stock up on the following tools and materials:
- A set of fitting and assembly tools;
- Socket wrench;
- Tester;
- Compression gauge;
- Gap measuring probes;
- Needle;
- Sandpaper;
- Fuel mixture (gasoline oil)
- Rags.
Chainsaw stalls at idle speed
Cases are common when the chainsaw stalls at idle. First of all, you need to check the muffler, and, in case of contamination, clean it from exhaust tar deposits. Also on carburetors. Some models, etc. There are bolts marked with H and L. Accordingly rough and fine tuning. By adjusting the bolt L during the operation of the chainsaw in such a way that its speed increases (the bolt is only turned half a turn), it is possible to eliminate this problem. Adjusting the carburetor requires an electronic tachometer and is a rather time-consuming process. That is why, in such cases, it is better to turn to professionals.
The chainsaw stalls at high speeds
In the event that the tool stalls at high rpm, there are three parts to check: the air filter, the fuel pump and the gasoline filter. The air filter must be cleaned, you can even wash it under water and dry it thoroughly. Then it is enough to disconnect the fuel hose from the carburetor and see if fuel flows out of it or not. If it flows with a full stream, the petrol filter need not be checked. If, on the contrary, the fault has been found. The breather can be cleaned with a regular needle, and the filter can be carefully disconnected from the suction hose, cleaned or replaced with a new one. The petrol pump is checked for wear: if fuel does NOT seep through it, then everything is fine with it. If the problem that your tool stalls at full speed is due to some damage to the pump, then this part just needs to be replaced with a new one.
Repair and service of garden equipment.
Specialized service center AGROTECHSERVICE. Comprehensive warranty and post-warranty service for garden and municipal equipment from world manufacturers! We carry out sales of spare parts with delivery throughout Russia!
The chainsaw starts and stalls. Why?
There are several simple rules for the operation and maintenance of a chainsaw, the observance of which will allow you to maximize its service life. Preparing the correct fuel mixture, regularly cleaning filters and periodically replacing parts will save you from having to repair your tool for a long time. If it was not possible to avoid the breakdown, then you can figure out its cause completely independently. This applies to any brands of chainsaws, from more complex models. Husqvarna and Stihl and ending with the simplest models Makita and Patriot.
For what reasons the chainsaw starts and stalls?
Using a chainsaw makes hard work easier. But sometimes the chainsaw starts and stalls, the reason for this can be any. What to do? You have to choose: take it to the workshop to a specialist or try to repair it on your own. We will try to help the reader understand the reasons for the refusal, ways to eliminate breakdowns and give advice on using chainsaws. In turn, it will be useful for the owner to familiarize himself with the factory operating instructions and the design features of his chainsaw. This information will help him to correctly use and professionally repair the tool.
Chainsaw device diagram.
The chainsaw stalls at high speeds
In the event that the tool stalls at high rpm, there are three parts to check: the air filter, the fuel pump and the gasoline filter. The air filter must be cleaned, you can even wash it under water and dry it thoroughly. Then it is enough to disconnect the fuel hose from the carburetor and see if fuel flows out of it or not. If it flows with a full stream, the petrol filter need not be checked. If, on the contrary, the fault has been found. The breather can be cleaned with a regular needle, and the filter can be carefully disconnected from the suction hose, cleaned or replaced with a new one. The petrol pump is checked for wear: if fuel does NOT seep through it, then everything is fine with it. If the problem that your tool stalls at full speed is due to some damage to the pump, then this part just needs to be replaced with a new one.
Repair and service of garden equipment.
Specialized service center AGROTECHSERVICE. Comprehensive warranty and post-warranty service for garden and municipal equipment from world manufacturers! We carry out sales of spare parts with delivery throughout Russia!
What to do if a chainsaw stalls
Hello, dear subscribers and readers of my blog! Andrei Noak is in touch. We continue the theme of chainsaws. So, I already said before about what should be checked in a chainsaw in order to know the cause of its malfunction. Today I will move on to more valuable instructions, so that you do not look for the cause of the problem for a long time and know approximately how to solve it. Chainsaw is the most difficult tool, but it needs to be properly looked after. There are different cases, sometimes the chainsaw stalls when you press the gas, sometimes under load, and sometimes it does not idle at all. Let’s look at different situations together and try to find the right solution.
If you find that the tool does not start and stalls at all, then you do not need to rush to the service center right away, you can try to solve the problem yourself.
The saw stops working when the speed rises
Localization of problem areas:
- Fuel pump;
- Filters.
Filters are often clogged, especially when the chainsaw is used almost daily. The air filter can be detached and washed under warm running water. Before inserting into place. Dry thoroughly.
With frequent use of the tool, the gasoline pump may fail. After all, every detail has its own expiration date. It should be replaced or contact a service center.
Stalls on idle
Sometimes the saw stalls at idle, and a clogged muffler is a common cause of breakdown. It can be easily cleaned by yourself, you do not need a qualified specialist for this.
To adjust the carburetor, you need to find two bolts with the letters L and H. The latter needs to be returned, a little, only half a turn. He is responsible for the revolutions of the tool and, if necessary, will raise the idle speed.
Saw turns off when turning
In a horizontal position, the fuel pipe is at the bottom of the tank, but if the tilt tool is used, fuel will NOT be able to completely cover it. This is the premise that the chainsaw stops working when tilted, as the tube levitates in the air and does NOT receive the right amount of mixture.
Problems Hot
If you notice that the chainsaw starts without any problems without warming up, and after warming up it stalls. And whether to start it, Until it cools down, then here, there may be several problems.
Firstly, it is possible that somewhere there is a suction of a hose, an oil seal or a gasket. Second, inspect the muffler for carbon deposits. The third reason lies in the cylinder-piston group (CPG), whether there are scoring or irregularities there.
Sometimes carburetor adjustment is required. Another important prerequisite for the malfunction is the ignition coil. In cases where it fails, the spark is lost or becomes very weak, which is not enough to ignite the fuel mixture.
There are cases when the master is trying hard to the engine, then on cold, then on hot, thus pumping fuel. Here you need to pull yourself together, move the damper to hot start and gradually starts the instrument. At the same time, Slow down the speed to an almost idle level and it warms up for 40-45 seconds.
Checking the main chainsaw systems
We check each system sequentially:
- Fuel tank. Perhaps there is not enough fuel or it is of poor quality.
- The next test is the spark plug and high-voltage wire. Please note that the gap of the candle does not normally exceed half a millimeter.
- If the above items are checked and working correctly, move on to the carburetor and fuel filter. With a breakdown of the carburetor, contact a specialist.
Spark Plug Problems and Solutions
It is generally recommended to change this key component of the ignition system at least once a year. But often dust owners forget about this rule. And therefore, one should not be surprised that the device, the maintenance of which is carried out fragmentarily, is in total bad keeps idle speed.
Chainsaw spark plugs need to be changed once a year.
Therefore, pay attention to the following malfunctions associated with the operation of this system:
- Filling the spark plug with gasoline at the time of start. To eliminate the problem, turn out the candle and, without piercing, dry it. Excessive gasoline is drained from the engine through the hole-socket into which the candle is screwed. After a break of 30 minutes, the candle is put in place, the mechanism starts.
- No spark due to poor contact of the spark plug tip with the high voltage lead. The connection is checked if the violation is violated, the defect is eliminated.
- There is no spark due to a malfunction of the electronic ignition unit. If there is confidence in the reliability of the connection of the tip with the high-voltage wire, but sparks are still present when the starter is turned on, then a malfunction of the ignition unit may be a prerequisite for failure. This component is not restored, it is only replaced with a new one.
- Incorrect gap between the spark plug electrodes. In different types of candles, this indicator ranges from 0.2 to 0.5 mm. The correct clearance is established with a feeler gauge of the appropriate thickness. A larger or smaller gap for a given type of candles is not allowed.
Meanwhile, during the initial inspection of the spark plug, it may turn out that the reason why the chainsaw refuses to work is not at all in the defects of the spark plug or other elements of the ignition system.
Spark plugs may indicate a saw malfunction.
So, if the candle turns out to be completely dry, this may mean that the original problem lies in the impossibility of fuel entering the combustion chamber. In this case, check the entire gasoline supply chain from the carburetor itself.
At the same time, there is a characteristic black carbon deposit on the candle body. A sign that the carburetor is probably poorly adjusted. This causes the fuel mixture to become oversaturated with gasoline. Oil may have spilled into the fuel. In this case, clean the spark plug, replace the fuel and adjust the carburetor.
Problems associated with improper operation of the fuel system
The chainsaw periodically stalls at idle, also due to a violation of the integrity of the fuel line or an incorrect ratio of ingredients fuel mixture, consisting of gasoline and oil.
Before each switching on of the cutting mechanism, it is necessary to visually inspect its blocks and assemblies, paying attention to possible defects in the surface of the housing, mechanical damage, flow of working fluids. This also applies to the saw fuel line, which is usually a rubber tube.
If the device was (especially for a long time) in a damp place and it had to withstand sudden fluctuations in air temperatures, this tube could simply crack. This fuel line is NOT suitable for further use and should be replaced.
Another prerequisite for which a chainsaw can stall at idle speed is non-compliance with the ratio of ingredients during cooking fuel mixture. The proportions of gasoline and oil included in it must exactly match the manufacturer’s instructions for a particular device. If they are not observed, the engine will not lubricate sufficiently and the whole mechanism will stall persistently.
Substandard carburetor operation
If empirically it turns out that the filters are clean and the ignition system is NOT to blame for the fact that the chainsaw is capable of functioning at idle, the owner of the tool is advised to switch his attention to the carburetor.
It is necessary to disassemble and assemble the carburetor without haste, since it has many parts without which it will not be able to work.
Often the misalignment of this unit, which is responsible for supplying a certain volume of air-fuel mixture to the engine cylinder, leads to unstable operation. It can be adjusted with three special screws located on the carburetor: screws for maximum and minimum speed, as well as a screw that controls idle speed.
Some manufacturers, fearing unwanted interference from incompetent people, supply their products with only one idle screw. But in both cases, carburetor adjustment can be made only by strictly following all the manufacturer’s instructions.
However, even after adjusting the carburetor, in accordance with the factory standards, this unit may junk. Then it is recommended to clean the fuel and air passages, jets, mesh of the filter element. If the membrane is damaged, it must be replaced with a new and high quality.
When doing maintenance and repair of a carburetor, you should always remember that it is usually crammed with many very small parts, without which the device simply cannot work normally. Therefore, the carburetor should be disassembled and assembled without haste and with extreme caution.
Idle problems due to faulty muffler
In the event of a noticeable drop in the power of the internal combustion engine at idle, after which the car often stalls, you need to remember to check the muffler. The fact is that the specified unit may be heavily clogged with resinous particles and combustion products of the extinguisher, a spark falling on the walls of the muffler in the form of thick deposits.
As a result, the resulting impermeable layer interferes with the normal exhaust gas emission. This situation must be corrected without fail. A simple repair of a clogged muffler is carried out as follows.
Cleaning the muffler with a dry cloth is not allowed, as carcinogenic carbon particles can enter the respiratory tract.
The muffler is removed from the engine, disassembled (if this type of muffler can be disassembled). In this case, it is necessary to plug the remaining holes from under the muffler.
The entire unit and its individual parts are thoroughly washed with a cloth moistened with water from detergents. If the muffler is collapsible, wait for all its parts to dry completely. The non-collapsible unit is dried using an ordinary household hair dryer. Cleaning of this device with a dry cloth is not allowed, otherwise carcinogenic particles that form carbon deposits can enter the human respiratory tract.
As a preventive measure for the normal functioning of a two-stroke internal combustion engine muffler in fuel mixture chainsaws are recommended to use only high-quality oil and only that which is prescribed by the manufacturer of this unit.
Problems of the fuel and air filters and their elimination
The chainsaw will shut off at idle speed if the fuel or air filter becomes clogged. Disconnect the fuel lines from the carburetor to find out the condition of the first element of the fuel system. If, during pumping, the fuel is supplied in doses corresponding to the specified rates, then the cause of the malfunction should be looked for elsewhere. If gasoline enters the carburetor weakly or does NOT flow out of the hose at all, then most likely the filter is clogged with debris.
To clean it, remove it from the tank (from the container until this moment it should be Drain all fuel). Extraction takes place through the filler neck of the tank using a wire hook. The filter is disconnected from the suction hose. If possible, clean the filter. If there is such a possibility or it is impractical to do it for a number of reasons, the used filter is replaced with a new one.
Chainsaw may stall if fuel filter becomes clogged.
The air filter can also be clogged with dirt or dust, resulting in malfunctions at idle. It should be remembered that clogging of this filter occurs quite often, as a result of which it becomes difficult for air to enter the system. The proportion of gasoline in the fuel-air mixture increases, and it turns out to be too rich. In this case, normal engine operation should not be expected.
For cleaning, the air filter is removed with special care so as not to shake off the dust into the carburetor. Then it is cleaned and thoroughly washed. Detergent is added to the rinsing water. After drying, the air filter returns to its place in the chainsaw.
For normal operation of the cutting tool, it is recommended to change the fuel and air filters every 3 months.
The car stalls at idle: Possible causes
From this it follows that various problems with the main components of any ICE lead to malfunctions: fuels and lubricants, the ignition system, the quality of the air-fuel mixture and compression inside the cylinder.
The main engine faults include the following:
- The motor will not start;
- It starts up, but, working unstable, quickly stalls at idle;
- The chainsaw works fine at idle speed, but stalls under load.
The reasons for idle speed violations can be different. But all of them can be reduced to several general positions. So, ICE malfunctions are caused by such problems as:
Chainsaw internal combustion engine.
Possible clogging of the fuel and air filter;
- Defective or malfunctioning spark plug;
- Violation in the initial settings of the carburetor caused by strong vibrations during the operation of the mechanism;
- Defects in gas lines;
- Incorrect ratio of ingredients in fuel mixture;
- Muffler contamination;
- Faults of the cylinder-piston group.