cavitation

[jeffers]

I have a 90 hp Nissan and the cavitation plate is about 1-1/4" above the bottom of the boat. It sucks air real bad when turning, should I lower the engine down on the next hole or should I try one of those fins that mount to the cavitation plate?<br /> It's fine when taking off and running on straight aways but the turns the boat slows and the engine revs up. Any suggetions?

 

[DJ]

Re: cavitation

That's too high. I would go one notch down and give it a try.

 

[Hooty]

Re: cavitation

Howdy jeffers,<br />Is that engine on a jack plate or just sittin' on the transom. The reason I ask is the engine just might be (depending on configuration of the boat's bottom) up to high, not trimmed out to far. <br />How is everybody in "Perrygould"? I gotta a good friend over in Osceola.<br /><br />g'luck & c/6<br /><br />Hooty

 

[Dhadley]

Re: cavitation

Yes - it's too high for the prop you are running. A fin may help, lowering may help or you can go to a better prop.<br /><br />Good luck!

 

[jegervais]

Re: cavitation

I agree with the previous posts to some extent - i.e. you MIGHT be too high, but before you break out the toolbox and hoist... Have you tried trimming in as you prepare to go into a turn? It may help the prop not loose its bite and still allow you to retain the performance benefit of a high mounted engine. Also, someone mentioned the prop - what prop are you running? If its a 3-blade (aluminum or stainless steel), you may want to consider a stainless 4-blade, they're great for higher mounted engine applications, have better hole shot and rarely loose their bite in turns or rough water.<br /><br />Just my alternative opinion/suggestions/thoughts/.02...<br /><br />-John