Well I needed a spare prop. I have a 5.0 MPI in a Monterey 234FS and was running a stock 14.25 x 19 aluminum - 1.62 ratio. Performance was pretty good - 48-49 MPH at 5000 with gear, 1/2 tank gas and two adults. I wanted a SS so I went to my old faithfull boat prop shop and they said I should...