86 V20 CC repower with 150 Optimax

[steplift20]

21 inch pitch,dam that sounds like a big pitch to me,I have a 150 black max and my prop is 15 x17 and that's perfect ,maybe I'm missing something.

[Stevebbc]

Originally Posted by steplift20

21 inch pitch,dam that sounds like a big pitch to me,I have a 150 black max and my prop is 15 x17 and that's perfect ,maybe I'm missing something.

The prop came with the motor, thought it would be too much but not so. Dropped my crusin rpm by 600 and increased speed 3 mph. No problem at all getting on plane. I dont think its 15 diameter though. Will check and let you know.

[Stevebbc]

Originally Posted by Stevebbc

The prop came with the motor, thought it would be too much but not so. Dropped my crusin rpm by 600 and increased speed 3 mph. No problem at all getting on plane. I dont think its 15 diameter though. Will check and let you know.

Prop is a 14.75 diameter Mirage Plus. My guess would be the Opti has more torque in the lower rpm range than the carburated Black Max is the reason it can power a 21 Pitch.

I run mostly in the ocean and have not run it at WOT so I don't know what top rpm is but will let you know when i do. Whatever it is, I doubt it would make me change props.

[Stevebbc]

Originally Posted by steplift20

21 inch pitch,dam that sounds like a big pitch to me,I have a 150 black max and my prop is 15 x17 and that's perfect ,maybe I'm missing something.

Steplift20, you are correct, could only get about 4500 rpm out of 21 pitch. Tried 15 x 17 this weekend. Lots better, 5300 or 5400 top end now and of course better holeshot. Running cooler too.

thks