I just dropped my first boat ever in for the first time today. Its a Hydrodyne Grandsport with the PCM proboss gt40 engine. Whenever i throttle up passed about 3/4 it acts like its going to stall then revs back up and does this repeatedly unless i lay off the throttle a bit.. it is fine at all speeds needed for wakeboarding. Any help would be appreciated i'm not mechanically inclined.
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