Cavitation

[off2board]

I just put on my rebuild prop yesterday and the first time I took off it seemed to of cavitated, or sort of sound like the trans was slipping. (kind of like the effect when you are going fast around a corner and there are alot of waves and your prop sucks in some air). My question is...is that normal. the thing I am thinking about is, I had a smaller prop on my boat to get me thru the week and Im wondering if there is some electronic system that learns the rpms or something???? I dont know. it only happened once and it was the first time I gunned it.
any thoughts?

[mtnsmith]

Could be off balance, a little tweak is all it takes to make a prop cavitate. Inboards are much more susceptible to any prop variation since there is not as much running gear in the water like with a sterndrive or outboard. I'd take it back to the repair shop or call them and let them know it is cavitating now.

[dogbert]

What prop was it that you had rebuilt? Like mtnsmith says, if it didn't do that before hand, it could be something's not balanced properly.

[chpthril]

Who fixed it and how? The pitch could be off or the cup has changed on one or more blades.

[kko]

you sure the keyway is still there?