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2001 XL800 over revving engine

3955 Views 3 Replies 3 Participants Last post by  kitflyr
Help! I have a 2001 Yamaha XL800 three seater (120hp) with 120 hours. Engine runs well but from 8mph to 20mph, the engine will overrev without picking up speed. If it had a clutch, you would say it is slipping. Once I get up to 20 mph or so, it runs fine without slipping. I thought this PWC had a direct drive so how could it be slipping? Could be air in the impeller area. Someone said the wear ring might need replacing but the impeller seems to have little if any clearance with side of housing. Could it be a worn impeller? It has some a few nips. Or something else? Ideas?
Thank you
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Hey I just experienced the same problem on my 2002 GP800r.. I was cruising around at 30mph and hit a medium sized wake when this first occurred... After about 10 minutes of idling back at 7mph(if i gave it gas it would over rev) finally the problem sort of went away and I got back up to 41 mph before i eventually slowed to 25 and ran into a small wake and the problem came right back.. It would idle fine at 4-8 mph and when I gave it more gas it would start to over rev, so I had to idle the rest of the way back.. I really don't know too much about wave runners but I'm guessing It's something to do with the Pump Seal or the Impeller.. Any suggestions anyone?
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