Question about Echo 30.1CC Chainsaw With a 14 and Chain

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Echo CS8000 keeps burning up spark plugs

I have an Echo CS8000 that will run for 45 minutes to an hour then it burns the spark plug up (it does not foul it actually burns up)
This happened two times and now the saw will not even attempt to fire.The saw just had a new intake boot installed on it and the carb. rebuilt on it about three weeks ago.
I just purchased the saw from an individual and when I went to check it out the saw fired up and ran great so I bought it but after 45 minutes run time under load the problems started showing up.
Has anyone else had this problem or does anyone have any ideas on how to fix it ?

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I'm not a small engine mechanic but it kinda sounds like its running to lean, not sure if there the same but if 4 cycle engines run way to lean they detonate and can melt a piston. Most of the time they will run fine under no load but once under load it will cause the detonation. If you have a compreesion gauge see if it has any compression if you dont have a gauge just put a finger over the spark plug hole and pull the starter to see if it builds any compression, if no compression probably a hole in the piston or bore hope this helps

Posted on Feb 22, 2009


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