4 blade prop coming out of the water

This isn't really an engine issue but I thought I'd post it here anyway.

I installed an OJ 13x13 4 blade prop on my '79 SN earlier this year. I've noticed that on hard turns I can now get the prop to come out of the water which causes the engine to rev high.

Have any of you experienced this? I never had this happen with the 3 blade prop.

There is no way the prop is coming out of the water! If it does, you are on your way to being upside down.

So, cavitation could cause this I suppose, but 4-blade props usually reduce the chance of cavitation, hence they are smoother (less vibration). If the prop is cavitating, you would feel increased and excessive vibration.

The other possibility is that the transmission is slipping when you turn hard. I would check the fluid level and make sure the tranny pump is not sucking air on hard turns.

Other than that, I no other ideas.

Plus, these boats sit bow down compared to some boats to start with. so popping the back end out of the water really isnt that hard.

I have not seen this on my 79. but when I do turn it that hard to do a 180, I will back it off as I cut. The bow does go down and the stern does come up in an agressive turn like this I guess if I stayed in the gas it would over rev but thats would be hard on the engine.

I'm with both David and BC on this one. Hopefully what AWhite70 is referring to is accelerating out of very tight, slow speed turns and like an outdrive or outboard trimmed too high, I've experience some unexplained cavitation allowing the engine to rev until I backed off and let it catch. But like David said, I wouldn't expect this out of that prop. As far as the prop literally coming OUT of the water, BC and the IrishFooter have obviously experienced the thrill that so many of us enjoy with our CC's on limited occasions. In case you haven't, many models, when put into a full and quick 180, and backing off the throttle instantaneously while or just after turning, can indeed put the nose UNDER water, while lifting practically the ENTIRE running gear briefly out out water, and it's surely not considered a problem, but a virtue of this ultimate handling boat. While not condoning this personally, and feeling it's gotta be rough on the equipment, they have however, done it for years, for the public, at the big ski shows as Irish' mentioned. The jetski analogy is right on the money. And 180 degrees is just the initial goal..........