I have a 20’ 1997 Tahoe Alpine with a 2002 Mercury 50ELPTO 20” shaft. I bought a 3 blade10.8 11P propeller. The motor is as low as it is going to go on the bottom screw hole. WOT the cavitation plate is about 1” below the surface and a couple inches below the motor pod. I hit around 15-17 miles...