Author Topic: Stihl 084  (Read 12492 times)

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Offline jmester

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Re: Stihl 084
« Reply #100 on: April 22, 2014, 07:04:01 am »
Going to go with the saw was running lean and over revved the motor. The extra heat made the rings stick. And the rings caught the bottom of the exhaust port and caused the piston failure. The plug color looks to be ok based on the color chart I looked at. Reddish brown to light grey. There is a chip in the cylinder at the bottom of the exhaust port. The beveled edge is gone. What do you guys think clean up the bottom of the exhaust port and rebevel or is it junk?
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