Did you ever find a prop for your boat?
I have a 60hp bigfoot on a 22' pontoon boat. It came with a 14x10p 3 blade rop on it. Im going to try a 13.8x10p 4 blade prop. The 11p prop was still a little to much prop for that little engine, so we shall see.
I have a 22' pontoon with a 60hp bigfoot. It came with a 3 blade 14x10p prop. Top speed was 21mph in ideal conditions. Typical speed is 18mph. I'm gonna try a 4 blade 13.8x11p prop. See if I can can any better performance.