Please check my thinking... I have a 20' Sunbird Neptune cuddy with a 2000 Johnson 150 hp V6, the max rated for the boat.
I currently have a 15" x 17P 3 blade alum prop which runs up to 5300 rpm, 40 mph (gps) with the boat full of fuel, 2 or 3 adults, and fishing gear. The WOT range for this...