4 replies to this topic

[sea-X-doo]

1996 Sea-doo Challenger runs and moves slowly (walking speed) but will not accelerate.

 

The RPM's increase with throttle increase but the boat does not go any faster.

 

Any thoughts or common problems that would cause this?

 

Thanks for your help!

[grieves5481]

Take a visual inspection of your impeller. Is there any obstructions? Is your impeller damaged? When your in forward, does the grates go completely in the 'up' position?

[Bugsy]

I agree, Inspect your impeller for obstructions and possible damage.

[RFoster130]

Sounds like typical cavitation. Im guessing your wear ring or impeller is shot. 

[jhjesse]

Cavitation:

Wear ring is probably worn. Take a light and shine in the jet pump. The distance between the impeller and the ring should be less than the thickness of quarter. If there is more clearance than that, the wear ring needs replacing.

If the clearance is good,  then probably the carbon seal ring is bad and needs replacing.  

Chances are better than good that it is all of the above.

 

I would just replace the wear ring, carbon seal, bellows and rebuild the pump . Always reinstall the pump with a new neoprene seal. Never reuse the old one. Should be good to go.

http://fiche.seadoow...STEM---INTERNAL

 

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