What is a realistic expectation I should have for slip on my main motor prop?
I have an H20PFC, 6 inch manual jack plate, a Yamaha Vmax SHO 150, and a 25 pitch PT prop. I am still playing with motor height, but prop is currently about 4.5" below the pad. Motor turns 5600 RPM when trimmed out and boat runs 45 miles an hour with full load and live wells full. I am not on the high limit of the running trim and can still trim up a little more, but when I do, prop starts to blow out, hull doesn't lift anymore, rpm goes to 5800 and just gives a big rooster tail with no increase in speed. When I run the numbers, I have 33 to 35% prop slip at WOT. I am thinking I should have no more than 8 to 15% prop slip. I am debating changing the prop out for a turbo FXP, but with this much prop slip on this prop, I have no clue what size prop to order to play with. Thoughts?
Brent