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  1. #1

    any ideas help please

    So my friend just got a 2010 gp1200 3 cyl 2 stroke . It had a melted piston in the last bore closedt to back of ski . So he got a brand new piston an a new sleeve an bored out to suit piston .we put it all together everything went together good an properly . Take it to the lake an was running great than after about 20 min its stopped pulled the spark plug on the new piston an bore an its melted again .wtf any ideas why or what we can look at when we pull it apart to stop it doing it again. Everything looked good could it be a carby issue cause we didnt touch the carbys

    Any help please

  2. #2

    Join Date
    Jul 2013
    Belfast River Richmond Hill Ga
    Air leak on intake causing it to lean out?

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