Manage My Life

Why does my chainsaw lose power and eventually die after it warms up? It runs great for quite a while when cold--enough to make several cuts.

by Manage My Life Last activity date:
February 18th, 2010

It's a Craftsman 42 cc Model 358350480. I've replaced the plug, cleaned the air filter, and it has fresh fuel/oil mix. When first started (it starts great, no problems) it runs well, plenty of power. After it gets hot, it will suddenly lose power, then rpms, then eventually die. I can often get it to restart with the choke, but it has no power and dies again.

Chain Saws , Craftsman , Trimmers & Edgers
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Manage My Life
If you have to let the chainsaw set awhile before it will restart, I suspect the problem might be in the fuel cap. If the vent in the fuel cap doesn't let sir into the gas tank as you burn it out, the fuel system will vacuum lock and the engine will die.

Try loosening the gas cap and retightening it while using the saw. If this makes the saw work ok, replace the fuel cap.

If the problem is not in the fuel cap, you might have a fuel line causing the problem.
by Manage My Life
February 18th, 2010
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