seadoo boats

Hi I recently purchased a 2001 seadoo challenger that the previous owner didn’t know the solution of the problem he told me he bought it bogging and he couldn’t fix the problem he rebuilt the carbs, new plugs, and new wiring for accessories he said there’s good compression in all cylinders what...

I have a weird problem. The boat runs great about 10 minutes then it drops RPM to 5K. I was trying to find any pattern in its behavior and found out that when I put it in reverse and run about 15 seconds the problem is gone. I can move forward at full speed then engine stalls at 5K rpm...