It fit on the bravo drive ? Count the number of splines carefully . I can't remeber but I think it is like 14 or 15 splines on a bravo . To messure spline size you need something to acurately messure how thick the shaft is where the spline are . Usualy smaller then the actual prop shaft size .
Some one must know ,come on help the guy out ! It's not like this is the only bravo out there !