How many RPM's are you turning? What pitch prop? Aluminum, Composite, Stainless Steel?
My 16 cruiser is running top speed 27 mph (confirmed by 2 GPS systems on board) with the 98 Honda BF 50 with hydrofoil, 2 batteries, 24 gallons of fuel, 48 quart ice chest (1/4 full), case of water, 2...