A chainsaw has long been not a luxury, but a necessary tool for those who have a summer cottage or home ownership. But, like any other technique, this tool tends to fail, despite the simple device.
The classification of major faults includes:
- complete lack of engine plant
- engine starts and stalls
- unstable tool operation
- work stop at load
- power loss.
If the chainsaw does not start at all, the reason may be as follows:
- Manufacturing defect
- Lack of fuel
- Problems starting the ignition system
- No spark from spark plugs
- Poor fuel mixture
- Carb blocker
- Problems with high voltage wire
- Lack of compression.
Why does the chainsaw start and stall, what should I do in this case? It is necessary to consider in detail the reasons for this.
Chainsaw starts and stalls: reason, video
The reason that the chainsaw may stall right after the factory is due to a malfunction of a certain part of the equipment.
- The most common reason why the chainsaw is wound up and stalled may be the low fuel level in the tank. This can be confirmed by stopping the tool when tilted, when fuel remains accumulate in a certain place in the fuel tank. With poor-quality fuel, a problem with the operation of the chainsaw may also occur, in which case it must be completely replaced.
- Clogged breather, which significantly reduces fuel consumption to the engine.
- Insufficient contact of the cap of the wire with the candle, which leads to strong heating of the candle insulator. Contact deterioration may occur due to mechanical shear or carbon deposits.
- Damage to spark plugs.
- Muffler clogging, due to which the exhaust gas output deteriorates, leading to engine shutdown. For this reason, the chainsaw may start and stall at idle. Sludge in the silencer may also occur due to poor fuel or improper use of the tool.
- Poor carb adjustment.
- Piston group breakdown
- Problems with the fuel filter or pump. In this case, gasoline may leak through the pump or leak poorly through the fuel filter to the carburetor. As a result, the chainsaw starts and stalls with increasing speed.
- Air filter is dirty. Problems with this element of equipment lead to the fact that, with increased loads on the engine, it simply can not cope with them due to clogging and stops. A similar result is also obtained with an increase in speed.
- Short circuit due to lack or insufficient lubrication, as well as a problem with the chain brake.
Why the chainsaw starts up badly and stalls
With a poor start up of the equipment “on a cold”, the problem may be in the absence of compression, i.e. the rings are worn out due to the long service life, their replacement is required. Sometimes the reason that the engine starts poorly in an unheated state is a problem with the muffler, as well as poor contact between the spark plug and the wire.
Also, the reasons for a poor start may be wear or damage to the gasket, rubber cuff in the carburetor accelerator pump, due to which there is an additional air flow, leading to an increase in the revolutions of the saw.
The operation of the equipment must be correct, with periodic inspection of the constituent elements to prevent breakage. To troubleshoot, it is necessary to check all components of the equipment for their functioning.
If the chainsaw starts and stalls, the cause can be eliminated on its own. If it is a shortage or improperly prepared fuel mixture, you need to fix it. For prophylaxis during the idle time of the chainsaw should always drain the remaining fuel.
It is necessary to carry out periodic check of spark plugs. In this case, remove carbon deposits that clog the joint gap, and also check the tips for fuel. Another cause of malfunctions with spark plugs can be their wetting with gasoline. To do this, they need to be removed, wiped with rags and left to dry. Defective candles are replaced.
If there is no spark between the spark plug and the high-voltage wire, but if they are well connected, the ignition unit must be replaced.
Muffler clogging is a common cause of failure, in which the chainsaw starts and immediately dies. To eliminate the malfunction, it is necessary to dismantle the muffler, clean it from soot using sandpaper or a special chemical solution. If the chainsaw model is not separable, chemicals are poured into the system and are there for several hours, then it is blown.
The carburetor must be adjusted if the chainsaw stalls idling. Fine tuning is quite a time-consuming process, so it is usually done at service centers. But, on some models there are elements for its adjustment, it is enough to turn the bolt half a turn to increase the revolutions of the chainsaw, the problems will be eliminated. If the nozzles, nozzles, channels and filters are clogged, the entire carburetor must be disassembled and cleaned. When the seals, gaskets, cuffs are worn, it is necessary to replace them, preventing the "suction" of air.
If you have problems with the fuel or air filter, you must replace the fuel pump or clean the air filter.
If the breather is clogged, clean it with a regular needle.
When the chainsaw starts and immediately dies, the cause may be a malfunction of the chain. To eliminate problems, the presence of oil in the chain lubrication tank is checked, as well as the oil exhaust pipe for breaks or blockages.
When inspecting the piston group, you should pay attention to the cylinder, if necessary, replace it or the piston. You can bore the cylinder to fit the dimensions of the new piston. If the piston with the cylinder is normal, you should pay attention to the defects of the piston rings and the need to replace them.
Among other things, it is necessary to control the service life of the parts indicated in the product passport, which includes the drive sprocket, tire, chain, part of the anti-vibration system, and replace them in time.
With a long idle time, it is worth checking the condition of the fuel line. If the tube is cracked, you will have to replace it with a new one.
Why do I add speed gasoline trimmer begins to stall?
I bought a trimmer, mowed a month like in a fairy tale, did not overheat. Then he suddenly began to quickly warm up and stall as soon as I add speed. The main thing is working fine for the first 5 minutes, and then it starts. As if he lacks air, buzzing and stalling. what to do?
There are many reasons, I will express my assumptions.
Under the carburetor, in the area of the fuel hose, there is a filter, a regular grid,
Here it must be cleaned.
The second common reason, a muffler, inspect it, it may be clogged with grass to the eyeballs.
The carburetor itself can junk, and if the trimmer is Chinese, then it is better to throw it out (carburetor) and install a new one.
Chinese carburetors are deregulated by themselves and it’s very difficult, and sometimes not possible, to adjust it to its previous work.
Another common cause is fuel, it is advisable to produce it, or pour in the right amount, it is not recommended to keep the fuel in trimmers for more than 4-5 days.
Blow out the gas tank cover, there is a valve there, it could very well stick, or simply become clogged with dirt.
Air leaks through the fuel hoses, you can tighten the clamps.
Well, the last option is that the carburetor is rusted, according to the instructions for the winter fuel is drained, but users (experienced) say that it’s better not to do this.
And it stalls when adding speed, because at idle and small, he has enough fuel, at large no longer.
Not so long ago, I myself was tormented with a similar misfortune, I will describe how I had it at first, and then I will try to help you as described.
I bought a trimmer in the spring, but began to use it only in the summer, first mowed everything that could be, and then abandoned this thing. In the fall, when it was necessary to mow dead wood, the trimmer first worked normally for one day, and from the next day it began to stall. The most incomprehensible thing was that it starts up normally, when you slowly press on the "gas", it also seems to work fine, but when you just start mowing, it will immediately stall.
The reason was in the air, or rather in the air filter. He simply hid in small pieces of grass, both fresh and already old. I can’t understand how she got there, most likely at the moment when she mowed in uncomfortable places, then the trimmer was tilted and possibly pulled from the ground, since there was still sand.
The filter itself is approximately the same as in the photo
To the touch like soft felt. It was in the country, so I whipped up a new filter from a hard sponge. After replacing it, the problem immediately disappeared, the trimmer stopped stalling. As I understand it, he simply did not have enough air, so he choked in fuel.
Your case. the trimmer stalls, but.
I also wanted to advise you to change the filter, but I’m afraid that this will not work and the problem will not disappear.
It was alarming that you wrote in detail to the question, namely, that the trimmer stalls only after 5 minutes of operation. In this case, the problem cannot be connected with air, since the first time it is enough for it, but this cannot be, if there is an obstacle to the air intake, then it always is.
In my opinion, there may be a reason for the flow of fuel, most likely the filter is clogged, or something has got into the fuel tank and at some point closes the channel. Try replacing this filter, it is worn directly on the intake pipe.
Another variant of the problem (I would not want to scare you) is the engine, or rather the piston system. There is such a speculation that when the trimmer is cold, nothing prevents it from working, but after 5 minutes, when the temperature rises, the piston expands and starts to wedge, due to this the engine rotates hard and it stalls. After the engine cools down, the trimmer can be started and continue to work with it.
Lawn mowers, trimmers, brush cutters. Knowledge base
Huter Trimmer Starts And Stalls
Video: Trimmer Starts And Stalls
by ZusarLawn Mower. 07/10/2018 0
How not to get confused if the lawn mowing does not start
The tool, despite its small dimensions, is a complex technical device. If you study the operating manual, it turns out that the reasons why not lawn mowing, known and disposable. It is necessary to exclude the causes that impede the start of the tool, one at a time. Usually start with more accessible nodes with easy health checks.
All the reasons why the lawn mowing does not start can be systematized according to the specifics of the operation of individual nodes. In the service center, the malfunctions are systematized:
- motor malfunction (piston wear, bearing malfunction, crankcase crack);
- fuel consistency failure. clogged air filter pores or carburetor malfunction;
- the ignition system does not work;
- mechanical failure. leaking hoses, broken wires under the braid, rupture of tubes.
The user first needs to check if there is fuel in the tank. Start-up is carried out in accordance with the annotation, putting the saw on its side. Set the air damper to the “closed” position, pump up fuel, turn on the ignition and make 3-4 sharp jerks with the starter. If the engine is running, open the air damper. Benzo trimmer stihl fs45 starts up and immediately dies the attention of those wishing to register on. Not lawn mowing. repeat the operation with a slightly open choke.
lawn mowing cannot work for a long time. The gearbox and engine will overheat. Mowing can be less than 15 = 20 minutes, making a five-minute break. On hot noon, the operating time is halved. When mowing weeds, sedge, the working time is required to be reduced.
If the launch fails, we begin to find the cause of the failure:
- check fuel quality;
- make sure the candle is working and the candle channel is clean;
- check cleanliness air filter;
- make sure the fuel filter is not clogged;
- check the purity of the breather;
- clean the exhaust duct.
complex causes will be found in the diagnosis of malfunctions, leading to a major overhaul of the carburetor. Such reasons include clogging of the internal channels of the carburetor, wear on the gasket and violation of the tightness of the internal halls with a loss of vacuum. Do it yourself repair of the lawn mowers, if it does not start, will require patience.
Why the chainsaw stalls, the main reasons.
The main causes of chainsaw damage
Although the chainsaw is a simple device, from time to time there are problems in its operation, which can be eliminated only by disassembling. The following malfunctions can be cited as examples:
- chainsaw is not gaining momentum;
- chainsaw ceases to function in the cut;
- the chainsaw starts and stalls;
- chainsaw loses its power;
- chainsaw stalls when pressed.
Most often, malfunctions are associated with interruptions in the functioning of the motor, as well as with malfunctions of other systems and nodes. Of great importance is the proper handling of this technique. When all the rules of use are followed, the problems with a high probability lie in the most obvious. When searching for the causes of malfunctions, it is advisable to start by checking the simplest part of the chainsaw and ending with the most difficult.
Checking the main chainsaw systems
If the chainsaw refuses to work normally, you need to make sure that all the conditions required for its normal functioning are provided:
Then you need to consistently check the functioning of all its elements. First you need to check the fuel tank. If the reason is not in the volume and not in the quality of the fuel, then the spark plugs may be the probable cause of the malfunction. The clearance at the candle should not exceed 0.5 millimeters. If it is too small, it means that soot has deposited on candles. In this case, remove the candles, clean them, and then reinstall them and try to start the chainsaw. In addition, it is advisable from time to time to completely replace the candles with new ones, even if they are in good condition.
Then you need to check the condition of the fuel filter and carburetor. Self-cleaning the fuel filter is a simple task, but the carburetor repair is best left to specialists.
Chainsaw starts and stalls. reason
If the chainsaw starts and stalls When you first try to do the job, the cause may be a problem with the chain brake or its jamming due to lack of lubrication. In this case, the oil level is measured. If the amount of lubricant is sufficient, then the cause may be the tube that leads it to the lubrication mechanism.
Another reason could be a carburetor breakdown. If he needs only adjustment, it can be done independently in accordance with the instructions. If the carburetor needs to be cleaned or repaired, then do not do without the help of professionals.
Another possible cause of this malfunction is the low fuel level in the tank. In this case, the chainsaw stalls when tilted, since the remainder of the fuel mixture is in the part of the tank opposite to the place where the suction tube is located.
Why chainsaw stalls when heated
It often happens that the chainsaw starts up cold, but stalls during heating. This behavior of the tool can be caused by the following reasons:
- The carburetor is incorrectly configured. This problem can be identified by how the device starts up to a cold one. If it is done without closing the air damper, and the engine starts without a preliminary flash, this means that after heating the engine, fuel fills the spark plug. The solution to this problem is to adjust the carburetor. Carburettor Adjustment Details
- Faulty coil (ignition module). This problem can be detected by sequentially checking the spark first on a cold, and then on a hot motor. If there is no spark on a hot motor, then the ignition coil must be replaced.
- Faulty spark plug. In this situation, as with a malfunction of the ignition module, the spark disappears when the engine is heated. It is necessary to replace the spark plug with a new one, and if this does not lead to a solution to the problem, then the ignition module and the distance between it and the flywheel should be checked.
Why chainsaw stalls under load
Sometimes a chainsaw is unable to function normally under load. Most often, this is caused by improper adjustment or leaking carburetor. In addition, the cause of this problem may be air leaks through the carburetor gasket or crankshaft oil seals. A tool that is unable to function under load also cannot confidently maintain idle speed.
Diagnostics begins by checking the carburetor and crankcase for leaks. If air leaks are detected through the crankshaft oil seals, their replacement is required. If air leaks are detected in the carburetor, a repair kit for the gaskets is required to solve the problem.
If these steps do not lead to the desired result and the engine crankcase with the carburetor are tight, then you need to adjust the carburetor.
If the Husqvarna chainsaw stalls under load, then for any deviations in the functioning of the motor, first of all, check the impulse hose, as this is the most common cause of breakdown of chainsaws of this brand.
What to do if a chainsaw dies when you press the gas
One of the most common questions regarding the operation of this device: why does the chainsaw stall when you press the gas and what needs to be done to solve this problem? In this situation, you must perform the following steps:
- check the fuel filter;
- inspect fuel hoses for leaks;
- check the muffler;
- try to add a little speed;
- check the condition of the rubber seals on the crankshaft.
Why the chainsaw is not gaining momentum and stalls
If the saw cannot gain momentum or stalls when you press the gas, then most likely this is caused not by the tightness of the carburetor or the engine crankcase. This problem is resolved by checking for leaks and adjusting the carburetor.
In addition, this malfunction may be due to a defect in the fuel tank breather. Due to the formation of vacuum in the fuel tank during the operation of the chainsaw, the required volume of the fuel mixture does not enter the engine, as a result of which it cannot gain speed or stall. If you stop the chainsaw, open and close the fuel tank and turn it on again, it will normally work for about five minutes, and then again will cease to gain speed or stall.
Another possible reason that the chainsaw is not able to gain speed may be an excess of soot in the muffler, which makes it difficult to exhaust the exhaust gas, which reduces the power and speed of the motor.
Why does the chainsaw stall when I press the gas?
Hello! If you are on this page, then, most likely, your chainsaw stalls when you click on the gas, and you want to know why it is happening and what to do about it. Well, I’ll try to help you in this problem by analyzing the most common causes of such a misfortune, as well as methods for eliminating them.
To begin with, I’ll immediately write for novice users that many chainsaws require idling the engine for about one minute before working. Until the engine warms up, the saw may stall when gas is added.
So, if a heated chainsaw can idle, but stalls when loaded, then this means that:
- incorrectly tuned or clogged carburetor. the most common case;
- it lacks air, the consumption of which increases sharply with increasing revolutions. this means that the air filter is dirty (a rare case, since the filter is dirty gradually, so the user first notice a loss of power);
- she lacks fuel, the consumption of which also increases with increasing speed. this means that the fuel filter is dirty (also an infrequent case);
- well, and the most unpleasant case, if there is excessive friction between the piston and the cylinder wall due to a lack of oil in the fuel mixture. after this operation of the chainsaw, you will most likely fly into the repair of the piston group, since on the piston and cylinder walls there are seizures that prevent the work of the saw.
We will analyze these cases separately.
Not enough oil in the fuel mixture
First, we will analyze the most unpleasant case. Why? Because before doing filter manipulations it is better to make sure that your oil and gasoline are mixed in the correct ratio.
Here, however, it is worth noting that if your saw has already been started many times (for example, about ten times), but continues to start, and then stalls again with increasing speed, then everything is apparently in order with the fuel. Otherwise, it would have simply stopped starting up at all.
But still, I recommend immediately dispelling the slightest doubt about the quality of the fuel, as soon as the saw you stalled when you set speed for the first time. Because, if the reason is in fuel, then, as already mentioned above, you can get into expensive repairs. And so, it can still do. To dispel doubts is to drain the old fuel from the tank and pour freshly prepared, in which the oil and gasoline are mixed in the correct proportion.
The correct ratio is better to look in the instructions for the saw. If you have lost it, then look at the ratio on the package of oil. Usually it is 1:50 or 1:40. If “non-native” oil is used (well, for example, Stihl will also have little “native” for Stihl chainsaws), then I recommend using a proportion of 1:40, even if 1:50 is written on the package with oil.
For an accurate dosage, I personally use a medical syringe and a measuring container, in which one liter of gasoline can be clearly measured. I pour a liter of gasoline into the container, fill in a syringe with 25 (at 1:40) or 20 (at 1:50) cubes of oil and add it to gasoline.
After preparing a new mixture, merge the previous mixture from the tank, in which we are unsure, and fill in the freshly prepared one.
Now that you’ve done everything to dispel any doubts about the quality of the fuel, we proceed to further steps.
As I wrote above, with a lack of oil on the piston and cylinder walls, scoring can form. and almost always form. If you are lucky and there are no badasses, then with a new fuel mixture prepared in the correct ratio, the chainsaw should start working normally.
If teasing has appeared, then the saw may start and stall several more times, after which it will cease to start at all. In this situation, I sympathize with you, since, most likely, now you will need to make a replacement piston group, which will cost a lot of money.
If the saw, as before, starts and stalls at high speeds, then we carry out manipulations with the filters.
Air filter is dirty
Making sure the air filter is dirty is pretty easy. You just need to remove it and start a chainsaw without it. if the saw is working properly, then the matter is in it and it just needs to be changed or washed, depending on its type. And do not be afraid that the chainsaw will work for some time without dust protection. if there is no dust cloud around you, then everything is in order.
So, remove the air filter. To do this, you need to remove the cover from the upper back of the chainsaw, which is fastened either with screws, or simply with some kind of lock, which you just need to turn or snap off.
If the saw is working properly after removing the filter after starting, it means that it is dirty.
The air filter is either felt or nylon. The first resembles cotton wool or synthetic winterizer, and the second looks like a fine mesh of nylon threads stretched on a plastic case. Felt need to be replaced with a new one, but nylon can simply be washed in soapy water, dried and put in place.
Well, then calmly use the chainsaw.
Fuel filter is dirty
If the option with an air filter does not suit you, then try to change the fuel. It is located in the gas tank and is attached to a hose through which fuel is taken from the tank.
This hose must be gently pry off with something and remove from the gas tank its edge, on which the filter is fixed. Here, the option of working without a filter, as in the case of air, is better not to apply, since you cannot know for sure whether there are any unnecessary impurities in the fuel.
So just change the fuel filter to a new one and try to work. If everything is fine, then congratulations. you have found a reason.
Carburetor Cleaning and Tuning
If all of the above did not help, then, apparently, tuning or cleaning the carburetor is required. It is not recommended to do these procedures on your own, since most often such attempts still end with a trip to the service. So it’s better to immediately go there and do not disassemble anything yourself. But if you still want to dig deeper into it yourself, then it’s best to watch a video that shows how experts do it:
On this I will end. Thank you for the attention! Read other articles on this site! See you soon!