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  1. 06-09-2015, 08:35 PM #1
    stanleydan
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    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. 06-09-2015, 08:36 PM #2
    stanleydan
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    The owner said the lower piston is missing material where it appears to be flat.
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  3. 06-09-2015, 09:49 PM #3
    Mustang Matt21
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    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.
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  4. 06-10-2015, 04:38 PM #4
    Myself
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    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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