Two weekends ago I launched my Formula 303sr1 at 84mph over a wave and out of the water, before the starboard drive touched back down I didn't have time to get off the throttle, with that said, the Blackhawk on the starboard side needed replaced, instead of buying another expensive hard to find Blackhawk I purchased 2 new bravo1's, I need help from some of you guys that have more experience than me, what is the best pitch prop to get top speed for this boat with the bravo 1's, 4 blade,3 blade? I know with the bravos I am not going to be in the 80mph bracket anymore. >The twin motors are 502mpi 415hp each. Any help will be greatly appreciated.

Sorry to here about your drives.I have a 18 donzi running a blackhawk drive with 31 props love the set up.what is your ratio on your drive.there out there to find.if you like them get an other.

What are you doing with the old drives and props might be interested.thanks craig.

Iv got the good drive for sale 1.5 gear

A boater from another website suggested a 25 pitch marige 3 blade for my bravo1. Does this sound right anyone???

Depends what Blackhawk props were on the boat.

We do have test propellers and can offer you some set up assistance.
Let us know what we can do to help.

Brett

Blackhawk props where 29 pitch.

I'd start with a set of 30's and bet a baseline.
Let us know if you need test props.

Brett

did you blow the actual case apart?

why not just replace the gears in the blackhawk

All parts in the upper are the same as bravo 1 except the vertical shaft that s a short one and not available thru mercury but max works have them ,they even can swap it in to a xr blackhawk but that cost some $$$