Had to machine the new prop to clear the rear seal housing so delayed the next test a bit, also changed the seawater filter which kept blowing its lid at speed.
ran the boat upto 5200 rpm and got 45 kn on gps showed 55mph on speedo which looks like the prop is in the ball park, ran with 12psi boost which is around 200hp its still got about 150lt fuel in it so there is more to come.
looking at the engine coolant temp the in temp is 65c and the outlet is 125c which is a bit concerning i think the thermostat is slowing the coolant flow due to the cooling effect of the incoming coolant on the stat so will remove it before the next run.
Also the steering was feeling a bit sketchy and looking at it there is some play in the pivot on the mid section so will do this before next run.
Once these problems are ironed out I will add a bit more boost and then !!!!!!!!!!!!!!!!!!!