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Mo_Gearhead Mo_Gearhead is offline
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Join Date: Jan 2007
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Had a Stihl that acted similar. I checked everything (I thought). Gave up, took to small engine shop. He removed the muffler, showed me the exhaust port.
What should have been a good sized, oval opening was almost closed shut with oily/carbon buildup. He cleaned the exhaust port and muffler of crud ...ran like new.

According to him, (perhaps it's only Stihl products?) people do not run them enough at FULL THROTTLE. He said idling and mid-ranged RPM chokes them and lets the oily/carbon buildup happen.
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Last edited by Mo_Gearhead; 08-08-2007 at 03:36 PM..
Old 08-06-2007, 09:56 PM
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