Hi,
I have a 2002 24' Tracker "Party Barge 240" pontoon boat with a 2002 Mercury (Tracker) 90 HP outboard. Current prop is 15" pitch, approx. 13-1/4" or 13-1/2" diameter, aluminum. At W.O.T with just me on the boat, the tach reads 5500 RPM. With the family (4-6 people) and "stuff" on board...