Quote:
Originally Posted by Gate Keeper
My nephew has the STHL 660 chain saw and he said it is unusually running high RPM at idle and he doesn’t know why or how to correct it. I am not an engineer but I know we have some clever people on the forum who might know the answer to his chain saw problem?
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It should have a throttle stop/adjuster on it.If you can locate that then run it up to temp and see if you can adjust it to slow it down. 
That what I did with mine.
http://www.madsens1.com/saw_carb_tune.htm
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Last edited by Number 6; 4th June 2019 at 08:32..
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