1997 Seadoo XP High RPM-but struggles to plane out.

[Ploppy69]

I’ve got a 1997 Seadoo XP that has an issue. The last few times Ive taken the ski out it really struggles to get up on a plane. The engine is getting high rpms at full throttle but it takes a good 15-20 seconds before enough speed is built up for it to get on a plane. Once it begins to plane, the engine RPM drop slightly and the acceleration is very good (RPM increases again once it starts getting going). Top speed around 47mph. It rides perfectly once its on a plane but takes forever to get there.

Not too sure what my issue could be, but any suggestions would be greatly appreciated.

Ive tried playing with different trim settings, but that doesn’t seem to help. With two people it’s impossible to get it to plane.

I know the engines good. 150psi compression on both cylinders. Sparks good and air intake is clean. I put a new carb kit on when I first got it.

 

[tobytd]

Check the wear ring…pump.

 

[2strokeboy]

Wear ring is most likely bad.

 

[Grim]

You have the 787 right? If so might want to look at your rave valves. They help transition the mid/low range to high range.

 

[etemplet]

Ski should blow through 47mph like nothing. As a few have mentioned, the wear ring is bad or you could be cavitating. Check wear ring first and make sure you have the correct impeller. Good Luck !

 

[seadoosnipe]

You have the 787 right? If so might want to look at your rave valves. They help transition the mid/low range to high range.

He’s said it has the revs. This does most certainly sound like the pump wear ring. But, I see where you’re going with that. It would almost seem like a big, if they failed to open at the right time.

 

[seadoosnipe]

The description is classic pump wearing ring.