Proper Prop size Yamaha OX66 250 hp, 25' CC DV

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BassTub

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Feb 10, 2017
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Kent Island, MD
Hi,

I recently bought a 1996 Parker with a Yamaha 250 OX66 and don't feel it is propped right. Right now at 4800 RPM's under full load I do right around 25 MPH at 4400 RPM's I am going 20-22 mph. I know this boat isn't a rocket ship however feel I should be getting a little more out of it.

Is there a way to figure out proper prop size except buying new props and testing them out?

Thank you for your help!

Chris
 
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