Cavitation Issue - 2009 Speedster 200 Twin Supercharged

[RahulK101]

Hi There,

I noticed that when we are applying the throttle, the RPMs are very high (especially on the right engine). However, the speed remains low until the boat eventually planes out and catches itself. Approximately 195 hours on the boat. Supercharger rebuild was done 95 hours ago. 2009 Seadoo Speedster 200 with the twin supercharged engines producing 430 HP.

I took a peek at the impellers and they seem to look pretty rusted and the edges of them are not the cleanest. The original plastic wear ring is also there as well. Do you suggest I replace these to solve the cavitation issue?

Btw, its been in fresh water only - I live in Ontario, Canada.

If so, can anyone link the appropriate impellers and wear rings? I am assuming I need 159mm?

Thanks for your help!!

 

[pretex]

You can go on the links in this forum at the top to look up the parts for your year and model. I would recommend the OEM wear ring, not sure which your model uses/size of jet pump.

 

[MacSeaDoo]

If you can, send us a picture from underneath looking up through.

If the impeller edges are damaged, you will get cavitation.

+1 on the OEM parts side. Have seen many on forum buy knock off wear rings only to have issues with clearance.

 

[POPPS]

Yes,,,please post a pic,,,,

 

[spinyard]

check your carbon seal too, i replaced mine with the newer style (larger) and slightly longer bellows boot and it really helped cavitation

 

[MDH19]

Good point on the carbon seal If you are going to pull the pump. If the wear ring is in good shape (free of gouges, etc) then no need to replace it I’m told As it is not a scheduled maintenance item. If you have damaged impellers that could be your problem as the consistent small gap is very important for the jet to function properly And not cavitate. Also, I had the same issue for couple of weekends so I pulled the boat and did a thorough inspection of the Impeller and ring and discovered a small chunk of driftwood about 1/8”x2” long lodged in the impeller gap. After removal it ran perfectly ... saved me from pulling the pump.

 

[RahulK101]

I am not sure what to take pics of.
Here is the left and right impellers inside the assembly and a pic of the rear setup.

The right engine is worse than the left.

 

[671mike]

Did you ever find out why it was Cavitating? Am having the same issue. New pumps, inpellers and re sealed the drives.