I know this thread isn’t all that new, but I have a 90hp four stroke on my 700LX dc. Believe it or not, it will do 50mph on gps with a 15p x 13.5” prop. My outboard max rpm is 6000. With my partner, me, and some light gear, we’re revving at 5700 rpm. I hear that the best prop setup is to be able...