Slow Speed issues

[harrisonps]

I have a 2007 Sea-Doo Speedster 150 (215HP SC) model. It still revs out (6850rpm) but only goes about 41mph.

I took the jet pump housing off and noticed some scrapes in the wear ring, which to me, look normal (ive seen much worse in my jet-ski owning days). The one thing i did notice was that the impeller seems to be bent. It would be the outside fins, all four, have a slight bend at each end. Are these ends supposed to have a slight bend in? Would that cause the drop from 60 to 40?

 

[RFoster130]

You should be getting 8000 rpms. Have you had the supercharger rebuilt yet?

 

[harrisonps]

I edited the year btw. its a 2007 not 2008. No i did not suspect the supercharger with it only being a 2007. I have a reader and I was showing preasure on the intake at idle and when it revs. The only alarms i showed in the history was a misc. ECU ground and oil pressure but none had gone off during the last few rides.

 

[RFoster130]

If you are only hitting 6850, that is the problem, not the pump end of things. I would suspect the supercharger. How many hours on the boat? You can start with the basics. Try new spark plugs. Someone else a while back had the same problem and a new fuel filter solved it. Start with those 2 things and if it doesnt help, i would look into the supercharger.

 

[harrisonps]

What should i be looking at as far as the supercharger goes? What are some common things that go wrong with these superchargers?

 

[harrisonps]

We took the supercharger off, and didnt see anything out of the ordinary. I see the drive gear free floats on a needle bearing... how does this engage? how do i know if its engaging properly?

 

[rodge37]

I just my 2007 Speedster SC rebuilt, at only 21hrs. Was only doing 6500rpms. I got the new washers and the 4" air intake

 

[harrisonps]

just ordered the SC rebuild kit for it... $322... not sure what all it comes with but once we tore apart the SC we found the oil seal took a crap and was blowing oil into the motor and did a little damage to the impeller as well. The washers were not ceramic, but do look worn and warped.

 

[dootndo2]

just ordered the SC rebuild kit for it... $322... not sure what all it comes with but once we tore apart the SC we found the oil seal took a crap and was blowing oil into the motor and did a little damage to the impeller as well. The washers were not ceramic, but do look worn and warped.

Did this end up fixing your issue? Was there any extra/other damage?