2013 GTI260IS high rpm but low speed with little thrust

[max ammo]

Been to dealer for 5 weeks, replaced plugs and seal in hull with no engine codes. Rpm @7900 generates 25 mph and will gradually climb to 53 mph but drops when turning right. They have inspected wear ring and supercharger but this thing just won't go... Opened case with BRP but still awaiting an answer. Anyone else have a similar problem?

 

[skiasylum]

Sounds like the typical drive line, drive shaft spline failure. Although can’t see how a dealer could miss that. Did they pull the pump and look at both ends of driveshaft splines? PTO end needs to be perfect.
Is it making any unusual noises?

 

[max ammo]

No noise that I can discern, other than at low end before its starts to go, it "bucks" or clunks like and old car taking off with a bad carb and acts like it wants to go but just falls on its face.

 

[skiasylum]

When it bucks or clunks does the motor feel like it’s running good or bad?

 

[max ammo]

Sitting at idle, steady rpm, no skip. Upon acceleration rpm shoot up but the seadoo accelerates like it is on the learner key takes quite a bit to get to 57 which is far short of the 70 it did go. turning right causes speed to drop off back to the 25-30 range. Also, problem gets worse the longer I run it. Dealer says my prop is "pristine" and wear ring was within spec and drive shaft appeared ok. They did find a pinched rubber between the hull and pump, but didn't affect operation.