Need prop advice

[FrancoC]

I'm looking for a propeller able to reach 5500 rpm and boat speed close to maximum boat speed. I use a 3 blade propeller diameter 12", pitch 11, max speed and rpm 10 knots at 4100 rpm at WOT.My boat specs:2007 MacGregor 26M  Motor Mercury F40/60 ELPT EFI .Gear ratio: 1.83:1 max rpm 6000 Any advise would be greatly appreciated.grazie, Franco

 

[JCPH3]

Prop Calculator

Franco, I assume from that gear ratio you are running the 60hp model. You should be generating more RPM's with that Prop. Last Season I ran a 12 3/4 x 11 on my Suzuki DF 50. Drove my M with Ballast 13-15 mph 5500 rpm. I'ved moved up to a DF 70 with a 14x 11.Here's a website with a great prop calculator, plug in your info.regards JC

 

[FrancoC]

Prop test

Thank you JC for your replay, yes your assumption is correct, my model is 60 hp. At present my boat is on the trailer but I suppose early, on May, I will try again the prop and the new one 3 blades diameter 12" pitch 10 1/2. After that I will write you the results in order to have new comments. In the main time I try the prop calculator and I'll verify the rusults. Ciao Franco