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Author Topic: 028S - worn piston  (Read 934 times)

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Offline jmester

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Re: 028S - worn piston
« Reply #10 on: November 14, 2016, 09:45:57 pm »
Maybe just carbon smear or the beginning of a lean run condition. Before you tear it down any more I would check the crankcase for air leaks. This is done by a pressure and vacuum test. Then go from there. I will send the 028 service manual to your gmail. I will send you a Stihl engine fault manual as well maybe there is a pic in the manual that looks like what you have going on then I can better help.
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