What size/pitch prop do I need?

[Dutchman54]

I have a Nautic Star 210DC, 21ft. 8'6" beam, 2650lbs. dry.

I currently have a Suzuki 3-14x18P SS prop and am getting about 5600-5700 RPM with 2 people at WOT. I'm getting about 32mph on the speedo.

I understand I can have the existing prop repitched?

I'm thinking I need to have it changed to a 16P?

What do the Zuki Gods say?

[Harper]

You neglected to say what motor we're discussing. The pitch change would probably be about right. But it would be good to know your motor, anyway.

[Dutchman54]

OOPS. Motor is a '05 DF140 4 cycle.

[Harper]

Well, like I said, 16 sounds like a good starting point. Should get you pretty close to 6000 @ WOT. Haven't ever had a prop repitched, so I can't comment on that.

[Marty D]

Be real careful who does the prop. I had my prop done a few years back. I had a bad vibration after they did it. Make sure the prop guy has a up to date work shop. You can keep your prop for a back up and get a new one. Going down one size on the pitch should give you 200 rpm. About 2 mph more.