1996 SeaDoo GTI with less than 100 hours (Orginial Owner). Been running great and all of a sudden when you throttle up you get a lot of rev but very little forward motion. If it had a tack, I would probably be red linning the engine. After a few minutes, it seems to catch and then hold on cause it will catch up and your off. But stop and try to go again, same thing. Does this unit have a clutch? To me, it seems like something is slipping in the drive shaft area. Ideas?? Thanks....