Searayder Sportjet 120 cavitates

mfhlmr0

Recruit
Joined
Aug 1, 2005
Messages
4
Recently my boat began to exhibit the following symptoms: <br />Cavitates during acceleration out of the hole <br />Cavitates while on plane in flat water with frequent jumps in the RPM as if it is ingesting air. <br />These symptoms have gotten steadily worse. <br />I think that this all began after the engine backfired while starting it (in the water). Is there an exhaust gasket that could be blown (leaking) exhaust into the impeller area? <br />Thanks for any help.
 

Capt Ken

Commander
Joined
Jul 30, 2002
Messages
2,270
Re: Searayder Sportjet 120 cavitates

Crawl under that thing and look at the ride plate. Thats the metal plate between the fiberglass and the intake grate. It should be flat and the rubber seal around it should not poke out.
 

mfhlmr0

Recruit
Joined
Aug 1, 2005
Messages
4
Re: Searayder Sportjet 120 cavitates

You were correct. All of the screws on one side of the ride plate were loose. You could not tell by looking at it but that side had dropped slightly. Apparently it was either creating bubbles or allowing exhaust or water to recirculate somehow. I removed all screws and put loctite on them before reinstalling them. It works perfectly now. Thanks.
 
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