Just before we look at the most likely reason your saw won’t idle, we’ll need to check some of the basics, and I’ll fill you in on why they’re important, or if you want to skip all this, go ahead and slide on down to the “Adjusting the idle screw” below. If the chain is moving while the saws idling, then back the idle screw out a 1/4 turn until the chain stops, this fine-tuning can now be done with the saw idling. If the saw still won’t idle, you have cleaned the air filter, got fresh gas mixed correctly, the plug is clean & gaped, and adjusting the idle screw hasn’t worked.
High/Low carburetor adjustment and Idle screws allow the proper airflow through the engine. No matter whether you set this too high or too low- it will cause the engine to die at idle. The simplicity of a 2 cycle engine makes it fairly easy to diagnose and solve the problems you may experience when working with your chainsaw.
Your chainsaw will only idle for about 5 to 10 seconds after you let off the throttle and then it will shut down. A bad fuel line will cause the chainsaw to run lean, and this means it will only run at idle for 5 to 10 seconds before it shuts off completely. An air leak around the intake boot or head gaskets will result in lower compression pressures and your chainsaw won’t idle properly.
Finally, if your chainsaw resounds well but dies off when working under a load, then it might also be an idle problem as well. If you can start your chainsaw easily, and it runs smoothly without any issue, then the idle is working just fine, and there’s no need to tamper with it. Finally, if your chainsaw resounds well but dies off when working under a load, then it might also be an idle problem.
why wont chainsaw idle Related Question:
Why does my chainsaw start but wont stay running?
The most common problems why a chainsaw does not stay running are: Spark Switch/Plugs. Bad Fuel. Blocked Carburetor.
Why does my chainsaw stop when I give it gas?
If the filter becomes clogged, not enough fuel will reach the engine for it to run properly. Because your chainsaw will idle, but dies when it is revved up to full power, it means that the filter is only partially clogged; it will allow enough fuel to the engine to run on idle, but not enough to sustain full throttle.
Why is my chainsaw revving?
If your chainsaw is over-revving, it indicates a lean air-fuel mixture is supplied to the engine. The carburetor might need tuning, or there might be an air leak behind this. Clean the air filter and adjust your carburetor’s screws that control the amount of fuel in the fuel mix.
Why does my chainsaw stall out when idling?
An engine stalls when it’s getting too much or not enough fuel from the carburetor. Stihl chainsaw carburetors usually have three adjustment screws: one each for idle, low speed and high speed. If the saw stalls while it’s idling, adjusting the idle screw, which usually is marked LA, should help.
How do you start a stubborn chainsaw?
Try to start the chainsaw after priming the carburetor. 5. Activate the choke by moving the lever to the full choke position and pull the starter rope 3 or 4 times to start the engine. If that doesn’t work, move the choke lever to half choke and pull the starter rope, 6 times maximum, to start the engine.
Why does my Stihl chainsaw not idle?
The two most common reasons a chainsaw won’t idle are a blocked air filter and an idle screw out of adjustment. Other possible causes include: Dirty Air Filter. Idle Screw out of Adjustment.
Why will my chainsaw only run on choke?
When your chainsaw only runs if the choke is on the problem, in most cases, is a result of fuel supply problems or a faulty carburetor. To fix the problem you should check and clean the fuel system and carburator.
Should you let chainsaw idle?
The idle speed should be lowered until the clutch is totally disengaged. Personally I don’t like to leave a saw on the ground running as it just sucks up dirt and soots up the exhaust. Once warm your saw should start with just a little tug and if it doesn’t maybe some tweaking is in order.
Can you clean a chainsaw carburetor without taking it apart?
To clean a carb, you have to take it apart. If it needs cleaning, the parts that need cleaning can’t be seen from the outside.
How do you clean a carburetor without removing it?
To clean a motorcycle carburetor without removing it, you’ll need to remove the bowls at the bottom of the carburetor. Once the bowls are removed, spray some carburetor cleaner up inside, wait a few minutes, then spray again to ensure coverage. Then replace the bowls and start the motorcycle to assess how it runs.
How do you clean a 2 stroke carburetor without removing it?
Vacuum away any loose dirt, dust, debris, grime, and great on the surface with a handheld and cordless vacuum. Lay out rags or cloths at the base of the carburetor to catch runoffs and protect the surfaces. Apply the carburetor and choke cleaner in thin, even coats. Then, wait for it to settle and work its magic.
How long does it take for a chainsaw to Unflood?
Many people wonder if a flooded chainsaw will fix itself? The answer is yes, but not always. By letting the chainsaw sit for about 20 minutes it will allow some of the fuel inside the engine to evaporate.
Why is my chainsaw hard starting?
A fuel issue is one of the most common reasons why a chainsaw won’t start. If the operator has repeatedly been trying to start the chainsaw through the recoil starter system, they may have accidentally flooded the engine with fuel. A common indication the engine has been flooded is the smell of gasoline in the air.
Will a chainsaw run without a fuel filter?
While it’s possible to run your chainsaw without a fuel filter, but this is not recommended. When a fuel filter is clogged, it can cause considerable damage to the engine and leave your chainsaw unusable.
Why won’t my Poulan chainsaw keep running?
Over time, the spark arrestor can become clogged with soot. If the spark arrestor is clogged, the chainsaw may run stall or run rough. To unclog the spark arrestor, remove it and clean it with a wire brush. You can also replace the spark arrestor.