Engine revs when I turn

[Susquehanna Squid]

Hello everyone! I was wondering if anyone would be able to tell me why my engine revs when I turn. I have a 2005 Monterey 180fs with the 3.0 Volvo Penta. The boat runs awesome but when I get into my turns the engine revs and it sounds like the prop is "breaking loose" (cavitation?) in the water. You definately notice a loss of power when it happens. I can correct it by throttling back but I should not have to do that. Any advice?

 

[Grand Larsony]

Re: Engine revs when I turn

Read up on ventilation vs. cavitation. They're different. May need to trim the drive down on some boats as you approach a sharp turn (not that I've experienced this myself).

 

[Fireman431]

Re: Engine revs when I turn

Your gathering more air under the boat and into the prop, allowing it to rev higher. As stated, trim down or decrease the speed/sharpness of your turns.

 

[Chris1956]

Re: Engine revs when I turn

That happens on some hulls, especially Deep Vee hulls with lots of deadrise at the stern. Flatter sterns don't do it as much. Take a look at the antiventilation plate while on plane, going straight. Then in a turn. let us know what you see.

 

[ryanr623]

Re: Engine revs when I turn

Trim down, try again

 

[jmarty10]

Re: Engine revs when I turn

Happens to me all the time when I'm doing a hard turn. Trimming down did help me this weekend but not totally. I have to slow down and trim all the way down then open up throttle.

 

[Susquehanna Squid]

Re: Engine revs when I turn

I will see what trimming down does for me. As for throttling back or not turning as sharp, I still have the problem at 2/3 throttle even if the turn is not very sharp. Will a hydrofoil help?

 

[Fireman431]

Re: Engine revs when I turn

I will see what trimming down does for me. As for throttling back or not turning as sharp, I still have the problem at 2/3 throttle even if the turn is not very sharp. Will a hydrofoil help?

No. people use those to help a boat plane out.

 

[Susquehanna Squid]

Re: Engine revs when I turn

What about a 4 blade prop or an anti-ventilation plate?