I have a 1990 formula 242 ss with a 21 pitch mirage plus and a 415 up 502 turning 5200 wot. I tried I 24 pitch bravo and wot was about 4500. Does anyone have any idea what a would need to turn that 24 at 5000? Thanks for any input. Gary

another 80-100 hp

thanks

Don't get hung up on pitch, just run the prop that works best for your boat. A Mirage plus on a 242 is a great set up.