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.
chainsaw does not return to 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 is my chainsaw revving on its own?
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 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.
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.
Why does my chainsaw bog down when I give it gas?
If your chainsaw is bogging down when you give it throttle, this is often a sign of improper gas-to-oil ratio. If there is too much gasoline in relation to the amount of oil used, this is known as a “rich mixture” and can cause the chainsaw to run poorly.
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.
How do you adjust the idle speed on a Poulan chainsaw?
Start the chain saw as you normally do and let it idle, making sure the chain does not touch anything. Insert a small flat-head screwdriver into the idle speed screw and turn it clockwise to increase the engine speed if it idles too slowly.
Where is the idle screw on a Poulan chainsaw?
The carburetor is located just behind the air filter, which is under a cover attached to the top of the engine. Remove this cover with a T-27 screwdriver to access the adjustment screws, which are usually on the left side of the engine as viewed when holding the chain in front of you.
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.
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.
What does a spark arrestor do on a chainsaw?
The spark arrestor on your chainsaw prevents dangerous hot sparks from igniting fires while you’re working. If the arrestor is clogged or dirty, however, it will also prevent exhaust from leaving the motor, which can prevent it from running.
Why does my chainsaw spark?
The most common cause of sparks from a chainsaw is metal-on-metal grinding. Whether it’s cutting through wood that has a nail in it or a grinding of gears in the chainsaw housing, a metal-against-metal grinding is the most likely cause.
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.