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  1. #1

    Potential Project 1998 GP800

    Hi Guy's !

    I am considering purchasing a 1998 Gp800 with motor problems. The owner said it has 81 hours and has now loss compression. He pulled the head and this is the pic he sent me.

    I am looking for some advice on what may have caused it and if the bottom would still be usable . If its just a top end job the price seems decent at $1000. This includes the ski and trailer. Is this a power valve motor ?

    Looking for input.

    Love the forum! Thanks
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  2. #2
    The owner said the lower piston is missing material where it appears to be flat.

  3. #3
    the top piston looks like it's missing some material on the left side by the arrow. also looks like it's a powervalve motor.

  4. #4
    Myself's Avatar
    Join Date
    May 2007
    North Central Arkansas
    Yes, 800 is a powervalve motor and also not all that common in the GP platform. A very fun ski when running properly. For that kind of money it will need to be mint condition. I would say $800 tops. It's easy to sink $1500 into a proper rebuild of that engine.

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