Sea Doo won’t go over 35 mph

[murraysean960]

I have a GTI 155 Limited and it was running fine and then all of the sudden, mid ride I stopped and then tried to accelerate again and the ski won’t go over 35mph. It is running at 4800-5200 rpms at this speed. It is cavitating (vibrating) but I do not see anything inside the impeller. Could it be anything such as low oil levels or a hidden item that is stuck? Thanks

 

[greenhornet2]

if it isn't misfiring sounds like impeller or shaft issue. make sure no rope is wrapped around the shaft or anything, bent prop ect.

 

[mikidymac]

In my experience when it is an impeller issue/cavitation you will get full rpm out of the engine the ski just will not go any faster just like the clutch slipping on a car. If it is actually missing I would still get under the ski and check the impeller but spark plugs would be my first thing to actually replace. Remember 4-TEC engines love to eat plugs for some unknown reason.