I have a 1989 Bayliner Capri 16' w/ a 2.3L OMC Cobra Motor. The current prop is a 13 3/4 x 15 Pitch, aluminum, and is very beat up. It seems that my boat runs at high rpms most of the time; however, we have been putting alot of weight in it. At WOT its at around 5800 RPMS and 30-35MPH or so I'd...