371xp won't idle when warm

[0621]

Hey everyone. My 371XP is a awesome saw. It starts, runs, and idles great cold. Once you make a couple cuts and the engine gets warm or hot it won't idle. It will run like beast in the cut but as soon as you finish the cut and let off the throttle it dies. Had the dealer do a leak test and everything checked out fine. Put new plug in it and air filter is clean. Any thoughts on what it could be?

 

[Gypo Logger]

Have you tried turning up the idle speed to where the chain just wants to turn?

 

[0621]

Yes, and it didn't help. Could it be the coil or ignition module?

 

[kyle.kipple]

Check the compression when it's warm. I'd even take the muffler off to have a look at the piston. If compression is low, when warm it could cause that problem. Could be numerous different things but I would start simple first.

 

[Full Chisel]

My guess is weak impulse. Replace the line and rebuild carb if that doesn't cure it.

Does it restart easily after it dies? If not, you may have a rich condition that is causing the engine to flood slightly and when load/throttle is backed off the saw stumbles and dies.

 

[0621]

Yes it starts pretty easy. Is an impulse line susceptible to heat

 

[cus_deluxe]

Have you tried adjusting the L screw? Could be set a bit lean and once warmed up its way too lean.

 

[tlandrum]

^^^ what he said