Potential Project 1998 GP800

[stanleydan]

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

[stanleydan]

The owner said the lower piston is missing material where it appears to be flat.

[Mustang Matt21]

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.

[Myself]

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.