Boat not going more than 3000RMP and 10MPH on the water

by Brian
(easton PA)

Hi. Just looking for some help here. I have a 1996 Seadoo Challenger Jet Boat. When the boat is out of water I can rev up to 7500 RPMs. Boat starts right up and stays running, even when its in the water. Problem is that when I but it in the water and full throttle, it doesn't go over 3000 RMP and no faster that 10MPH? I have good compression. New plugs. Fresh gas. I don't know what it is. Im going nuts! Anything would help. Thanks, Brian.

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