Finally got the boat at WOT this weekend. Fully loaded 24 seasport, full gas, gear and 3 guys. Flat water and the twin 150 yamaha's will do 45 mph and max RPM is 5200 on the starboard and 5000 on the port engines. The props are 13 3/4 X 19.
I understand a lower pitch prop will give me more RPM's, however that isn't a problem for me as I enjoy a 4000 rpm cruise ~ 30mph and 14 gph.
Question is, will a lower pitch give me any better fuel economy?