Boat and prop combo just does not feel/seem right. Hard to explain i guess but here is the set up.
18F Trihull
3500 rpm,
32mph(boat Speed'o forgot to check gps but im pretty sure its close enough)
4400 rpm Speed'o said 40mph
Prop is brand new Solas Amita3 cup. 15.5X17P
GR 1.61:1
At 4400rpm...