The chainsaw does not pick up speed when loaded
Situations, when the chainsaw stops, and how to find the cause
A chainsaw is a useful tool, which is in the arsenal of many home masters. But like any mechanism, this device can stop working properly over time. Most often the problem is that the chainsaw constantly stalls during operation. It happens under different circumstances, and the reasons are also several.
The chainsaw does not drop revolutions. how to find and fix the breakdown?
The most common cause of this common failure is a misaligned choke. The choke is needed to draw in air, which is needed for the carburetor to enrich the fuel mixture with air. To adjust the choke, you need to adjust the carburetor. In this case, special attention should be paid to the work of the power unit at idle speed. To check the operation of the engine in idle mode, you can pay attention to the state of the chain immediately after starting the engine. If it does spin, you may need to adjust the power unit.
Another common cause of this problem is air intake. If there is an air leak in one of the mechanisms of the chainsaw, the mixture will automatically be depleted, which will lead to a spontaneous increase in the revolutions of the chainsaw motor. In this case, the operator will need to carefully check the entire fuel system, including the carburetor, pipes, working chambers of the unit.
In some cases the chainsaw will not idle because the throttle cable is jammed. The power unit will automatically reach its maximum rpm immediately after starting. It’s easy to disassemble the throttle trigger and inspect the entire throttle mechanism. A jammed cable may need to be adjusted or completely replaced.
Why does the chainsaw glows when heated
It is not unusual to see a chain saw that fires when cold, but shuts down when hot. Such behavior of the instrument may be caused by the following reasons:
- The carburetor is incorrectly set. You can tell by the way the machine is started when it is cold. If it is made without closing the air damper, and the engine is started without a preliminary flash, it means that after heating the motor, the fuel floods the spark plug. It is often the case that the saw chain does not start when cold, but stalls when hot. on carburetor adjustment
- Coil (ignition module) malfunction. You can detect this problem by sequentially checking the spark first on a cold and then on a hot engine. If there is no spark on a hot engine, the ignition coil must be replaced.
- Failure of the spark plug. In this situation, as well as in case of ignition module failure, the spark disappears when the motor heats up. Replace the spark plug with a new one, and if that does not solve the problem, check the ignition module and the distance between it and the flywheel.
Chainsaw “bog” what to look for and how to fix
What to do if your chainsaw won’t hold idle speed??
Idling problems are considered to be a constant companion of chainsaws. Prerequisites that may have led to the stalling at startup and cranking of the circuit when idling can be several, the main ones of which are:
- littering of the air and gasoline filter;
- Poor-quality fuel mixture or its improper preparation;
- ignition module malfunction;
- A carburetor whose settings no longer match the load on the saw;
- the engine components are deformed or rusted.
A series of actions are carried out sequentially:
- Flush the fuel hose or replace it with a new one,
- Clean the air filter, which may be clogged with sawdust and dirt particles. Modern air filters. reusable, they can be washed with the addition of detergent, completely removed from the body of the saw;
- Check the gasoline and engine oil, which may be of poor quality or simply not suitable for this saw;
- check spark plugs and carburetor.
Troubleshooting one or more of the possible problems will usually bring the saw back to its former strength.
What to do if the chainsaw does not decelerate?
this problem is regularly encountered by owners who handle the throttle trigger too often. Many people ignore this problem, but in the end it turns out that the garden tool consumes many times more fuel than usual.
The following factors may be the cause of the problem:
- Strain on the throttle lever cable;
- a spring that is responsible for returning the throttle lever to its original position has become dislodged or deformed;
- the throttle valve is not in the correct position. it must be tightly closed in order for the chainsaw to work.
The complete disassembly of the mechanism, which is responsible for the throttle lever, will help you to solve the problem.
- Remove the upper part of the protective housing of the chainsaw;
- Carefully remove the spring and inspect its condition;
- Check the cable tension;
- Check the throttle lever fastener.
If all parts of the mechanism are in good condition, then you need to look for the problem in the carburetor. If the screw, which is responsible for the work of the engine at maximum speed, was turned too tight, then the engine will not be able to decelerate at all or will do it with delays. To correct the problem, you will need to readjust the carburetor.
Husqvarna chain saw does not rev up cause
Hi! If you are on this page, chances are your chainsaw stops when you press the gas and you want to know what is happening and what to do about it. Well, I will try to help you solve this problem by analyzing the most common causes of this mishap, as well as methods of fixing them.
To begin with, I will immediately write to novice users that many chainsaws require an engine idle for about one minute before operating. Until the engine warms up, the saw may stop when accelerating.
Consequently, if a warmed-up chainsaw can idle but stops when loaded, it means that
- An improperly set or clogged carburetor. is the most common case;
- it lacks air, the consumption of which increases sharply with increasing speed. it means that the air filter is dirty (a rare case, because the filter gradually gets dirty, so the user notices the loss of power first);
- It does not have enough fuel, the consumption of which also increases with increasing speed. it means that the fuel filter is dirty (also rare);
- Well, and the most unpleasant case, if there is excessive friction between the piston and the cylinder wall due to lack of oil in the fuel mixture. after this chainsaw operation you are likely to fly into a piston group repair as there are obstructions in the piston and cylinder walls that interfere with the operation. files.
Not enough oil in the fuel mixture
Let’s first analyze the most unpleasant case. Why? Because it is better to make sure that the oil and gasoline are mixed in the right ratio before performing any manipulations with the filter.
Here, however, it is worth noting that if your saw has already been started many times (for example, about ten times), but keeps starting and then stops again with increasing speed, then apparently everything is okay with the fuel. Otherwise it would be easy to stop starting altogether.
Chainsaw Fuel Screws Adjustment to Correct Bog Down, Won’t Idle, Won’t Run, Won’t Start?
Nevertheless, I recommend that you immediately dispel the slightest doubt about the fuel quality as soon as the saw stalls when you first set the speed. Because if the cause lies in the fuel, then, as mentioned above, you can get into expensive repairs. And yes, that can still do it. Clarify doubts. Is to drain the old fuel from the tank and pour in the freshly prepared, in which the oil and gasoline are mixed in the right proportions.
It’s best to look up the correct ratio in your saw’s manual. If you lost it, look at the ratio on the oil package. Usually it is 1:50 or 1:40. If you use a “non-native” oil (well, for example, STIHL will also have some “native” for STIHL chainsaws), I recommend using a ratio of 1:40, even if the package says 1:50 oil.
For precise dosing I personally use a medical syringe and a measuring container in which you can clearly measure out one liter of gasoline. I fill a liter of gasoline in the tank, fill a syringe with 25 (1:40) or 20 (1:50) cubes of oil and add it to the gasoline.
After making a new mixture, drain the previous mixture from the container that we are unsure about and pour in the freshly made mixture.
Now that you have done everything possible to eliminate any doubts about the quality of the fuel, we move on to the next steps.
As I wrote above, if there is a lack of oil on the pistons and cylinder walls, clogging can occur. and it almost always forms. If you are lucky and have no deficiencies, then with a new fuel mixture prepared in the correct ratio, the chainsaw should start working properly.
If there is irritation, the saw may start and run a few more times, after which it will not start at all. I sympathize with you in this situation, because you will most likely now need to replace the piston group, which will cost you a lot of money.
If the saw still starts and stalls at high speed, then we manipulate the filters.
The air filter is dirty
It’s easy to see if the air filter is dirty. You just need to take it off and start the chainsaw without it. If the saw is working properly, it’s right, and it just needs to be replaced or flushed, depending on its type. And don’t worry about the chainsaw running for a while without dust protection. If you don’t have a cloud of dust around you, you’re fine.
So remove the air filter. To do this, remove the cover from the top back of the chainsaw, which is attached either with screws or just a lock that you just need to turn or tear off.
If the saw works properly after you remove the filter after starting it, it means the filter is contaminated.
Chainsaw Chain Will Not Move? CHECK THIS OUT!
The air filter is either felt or nylon. The former resembles absorbent cotton or synthetic, and the latter looks like a fine mesh of nylon threads stretched over a plastic body. The wool should be replaced with new wool, but the nylon can simply be washed in soapy water, dried and put back.
Well, then feel free to use the chainsaw.
The fuel filter is dirty
If the air filter does not work for you, try changing the fuel. It is located in the gasoline tank and attached to the hose that drains the fuel from the tank.
This hose should be neatly torn away from anything, and its edge, on which the filter is attached, should be removed from the gas tank. Here the option of working without a filter, as in the case of air, is better not to use, because you can’t know for sure if there are additional impurities in the fuel.
So just replace the fuel filter with a new one and try running. If all is well, congratulations. you have found the cause.
Cleaning and adjusting the carburetor
If all of the above didn’t help, you probably need to adjust or clean the carburetor. It’s not recommended that you do these procedures yourself, as more often than not, such attempts end up with a trip to work. So it’s better to go there right away and not disassemble anything. But if you still want to delve into this, it’s best to watch a video showing how the experts do it:
Cleaning and adjusting the carburetor
If all of the above did not help, then, in all likelihood, adjustment or cleaning of the carburetor is required. It is not recommended to do these procedures by yourself, since most often such attempts still end up in a trip to the service. So it is better to go there and do not dismantle anything yourself. But if you want to rummage around on your own, you better watch this video which shows how the experts do it:
I’ll call it a night. Thank you for your attention! Read other articles on this site! See you soon!
If there’s no fear
When there’s no fear, you have to act. You should clearly know what to do if the engine has gone bad. Here everything is simple. It is necessary to turn off the engine. Of course, once you turn the ignition key, it won’t stop. The fastest way is to use a fire extinguisher. The content of the can is sprayed everywhere in the underhood. The carbon dioxide will replace the air, which is not good for the engine. This will make the engine stop. This approach can also help if flammable gases are released into the atmosphere around the machine. When puffs of thick black smoke come out of the exhaust pipe, it is better to move away from the car and call an emergency service immediately. If you don’t have a fire extinguisher, you can try manually blocking the air in the cylinders. A rag, plywood, or something else will do. If the intake manifold is closed and the engine is still running, it indicates that air is leaking somewhere. If the car is equipped with a manual transmission, put it in maximum gear and try to brake. This will give great resistance, and the engine should stall.
Why immediately stalls and gasoline chainsaw when you press the gas
Chainsaws are fairly reliable and uncomplicated designs. So if you take proper care of them and handle them according to the manufacturer’s recommendations, then they fail very rarely and different kinds of breakdowns are quickly enough eliminated. But if you are faced with this situation and want to repair your tool yourself, without resorting to the help of professionals, then delve into the information presented below.
In fact, it is impossible to uniquely and accurately identify the cause of why the tool does not start or stalls when you press the gas, as there are many factors affecting it. But let’s not forget that as a chainsaw is equipped with a simple two-stroke engine, the following conditions are important for its effective performance: lubrication, fuel, spark and air.
Consequently, the preparation of fuel-air mixture is engaged directly in the carburetor, the filter cleans the air from dust, the ignition unit and the spark plug create a spark, and the gasoline is the lubricant.
That is why it is necessary to search for the causes of this kind of failure in a sequential order, starting directly from the uncomplicated and gradually passing to the complex. And this is an important factor in the correct repair, because the person who, without thinking, begins to engage in disassembly of the carburetor, leads her to risk. Because this kind of assembly should be repaired or adjusted directly in special workshops (read about adjustment of carburetor).
It is important that for the trouble free operation of your tool you should be very attentive to your fuel. Because if this kind of mixture is not prepared correctly, most chain saws simply will not start. Consequently, not every owner would think to look for the cause of failure in the fuel. That is why your tool should always work properly to use only high quality gasoline.
And also to use only that oil which is made by your tool manufacturer. It is also important to prepare this kind of mixture in exactly the amount you would use in a week or two, but no more (see also “Not to exceed”). the ratio of gasoline and oil for a chainsaw).
Because otherwise overholding the mixture directly in the canister will cause it to lose all its octane properties and this will lead to significant problems with the tool.
Filling up the mixture when the mechanism is running
Also the cause of the breakdown can be a direct pouring of the mixture into the candle at the moment when the mechanism is running. In order to solve this problem, you need to unscrew and dry the candle, but remember that you can not burn it in any way. Excess fuel must be drained through the hole (spark plug), wait 20-30 minutes, then install it in place and try again to start the tool.
No spark and the chainsaw does not pick up speed
A chain saw cuts out when throttle because there is no spark. This can happen when there is no good contact between the spark plug boot and the cable. However, if this kind of connection works properly but there is no spark, the ignition unit (electronic) is the cause. It is important to note that these kinds of parts are not repairable, so they can only be replaced.
Don’t forget that by inspecting the spark plug, you will be able to obtain significant information regarding the breakdown of the chainsaw. If it is dry, it is because the cylinder is not supplied with fuel. That’s why you have to check the whole range of its supply step by step. If the spark plug is all black fouled, it means that the carburetor is not working properly, that is, it either supplies a lot of fuel or overflows oil directly into the gasoline.
Not enough fuel to keep the chainsaw going at full throttle
If the chainsaw stalls when you add gas, it means that the fuel is not supplied in sufficient quantities to fully operate the chainsaw. It could be caused by clogging of carburetor (its nozzle) or contamination of the filter (fuel filter). Remember that the first unit should be checked only by professionals, but the second can be cleaned by yourself.
The filter is clogged
The filter (air filter) can also be the cause of the problem if it is clogged with dust. But do not forget that each model has its own easily removable and characteristic features. That’s why don’t hastily start to disassemble and repair the tool. It’s better to “walk” through forums, where a huge number of various owners’ reviews are listed, so as not to make things worse.
For example, a STIHL chain saw stops when you press the throttle for a simple reason, namely simply because the breather valve is clogged.
In order to fix this kind of problem all you need to do is to disconnect the hose (fuel hose) from the carburetor and check if the fuel leaks from it. Since if the mixture flows in a full stream, it means that the breather is not contaminated, and if vice versa, then the cause of the breakdown is found.
Muffler as the reason for the saw stopping on load
Here is another reason why the chainsaw stops when you press the gas. the muffler. It is this part can interfere with the full operation of the tool in those cases where it is contaminated directly by the exhaust tar deposits. To do this, you simply have to clean it.
Cylinder Piston Group
It’s not uncommon for a Partner chain saw to choke on impact, and this is often caused by the cylinder piston group. Because by inspecting them, namely the piston and cylinder, the cause of the malfunction can easily be determined, directly replacing them. It is also possible to do a direct boring of the cylinder itself in relation to the size of the new piston.
But if after the inspection you found that both the piston and the cylinder have no damage, in that case the cause may lie directly in the rings (piston rings). To do this kind of check you need to insert the piston in the cylinder and gently start rocking it by means of the connecting rod. If you suddenly felt any looseness, the rings need to be replaced, because they are already worn out.
Insufficient chain lubrication does not start and chain does not rev up
Many people wonder why the chainsaw stops when I press the gas? The answer may also lie in insufficient lubrication of the chain (see: chain oil for chainsaws). The answer could also be inadequate chain lubrication (see chain oil for chainsaw chain), because the oil pipe could be leaking, or the openings could be clogged. That is why pay attention to the chain, because if it is dry, do not hesitate to clean the ducts that supply oil directly to the bar of the tool.Then examine in detail the parts where the oil pump fittings and tubes are connected. But if you have noticed that oil leaks in joints or you have found out a crack on pipes themselves, in the first case seal up the leakages with a sealant and you will have to replace the pipes.