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Cavatation

I have a 1980 fish nautique th

I have a 1980 fish nautique that I finally got to run good after a total rebuild on a 351w. I am running a 14x11 prop and at 2800 rpms the prop cavitates. I was running a 13x12 and it cavitated at 1800 rpms. Anyone have any ideas?
 
"what type of prop ? what size

"what type of prop ? what size is the boat and how many HP is the engine. 14x11 seems way to small unless you boat at 10,000 above sea level.

I know you have an inboard but I/O drive boats with V8's use a 19P-21P for starters..

Try http://www.miwheel.com/ContactUs.aspx

You can contact them directly, they'll help you correctly size your prop for your boat and use.. the guys here at Marine Engine.com I'm sure can also help."
 
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