I own a 75 Slickcraft ss-194 with a 188hp Mercruiser 888, 17 feet, v-hull, guessing weight around 2900 pounds. The prop is beat-up and I'd like to get a new one. Also according to the tach I'm turning 5300 rpm WOT and 43 MPH on the speedo (no gps yet). The service manual states max rpm at wot...