Have a 96 GSX SeaDoo. It has recently started bogging down. Changed plugs, run fuel cleaner through. It starts up just fine. When I go to throttle, it seems to want to go full speed then bogs down to around 3K RPM. If I restart and throttle up..some times it just takes off and goes. Runs fine for long periods of time. Seems as though once it warms up a little, it doesn't do it. Almost like something is stuck or lodged, shakes looks and runs fine. But if I idle for periods of time, it will do it again sometimes. Pretty new working on these engines, but pretty handy. Any help would be appreciated!!