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  1. #1

    I need help identifying a reason piston went.

    I have the top end apart. The attached pictures show the damage to the piston. It looks like a chunk of the ring let go and embedded itself in the top of the piston. I want to make sure this isn't an air leak or an oil injector problem.
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Name:	Piston mag side sm.jpg 
Views:	125 
Size:	180.7 KB 
ID:	248243  

  2. #2
    Saving the Manuals every day.. TheBlueMartin's Avatar
    Join Date
    May 2009
    Pure Michigan
    I dont think it was a fuel issue, the dome looks good. Looks like it was either lack of oil or cooling issues. Do you pre-mix?

  3. #3
    No I don't. I have to figure out how to test the oil pump before I reassemble.

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