1996 GTX Feels like its Slipping

[DTM1970]

I just bought two used GTX Sea Doos. Did a compressiion check everthing checked out fine. took them both out to test one ran great very pleased, however the other one feels like its slipping. Once I take off the RPMs jump but the boat doesnt. When the ski planes it doesnt slip as bad but nowhere near the power of the other ski.

 

[derek]

pump problem. impeller, wear ring, or just badly sealed after removal. i tore my hair out over this same problem. nice thick bead of rtv when reinstalling and it jumps out of water like-well, like it is supposed to.

 

[DTM1970]

How hard is it to replace the impeller and wear ring and how much should the parts cost? Im problable going to take it to the repair shop.

 

[derek]

not huge job. first, take the pump off and see what you have. if not truly horrible, put back together and seal wear ring to hull thoroughly. i put new wear rings in my speedster, then started changing impellers that weren't very bad. still cav'ed like hell. pulled pumps-fat bead of silicone-jumps right up on plane like it used to. the impeller and wear ring will cost you a couple mph of top speed, which means they cost a little fuel mileage at all speeds. but air getting in in front of the impeller is the real PITA for cavitation.

 

[DTM1970]

Thanks for all your Help! Ill let you know how it goes.