cupped prop set up question

[sprintflyer]

I am running a mariner 150 mag 2 on a 19' 296 sprint with a 25 pitch 4 blade cupped shooter.I have about 30-35 psi water at wot but my rpm are a little low and I can only get about 55 mph (speedo) with this set up. The tail is about as high as the cowling when I am trimed out but I can make it go higher if I keep triming. I am running a precision propeller 6 inch jack plate. Is this prop suppose to be run part of the way out of the water and how high should my motor be in relation to pad.<br />Thanks,<br />Sprintflyer

 

[sprintflyer]

Re: cupped prop set up question

by the way,I am not worried about my hole shot, only top speed.<br />sprintflyer

 

[FlyBoyMark]

Re: cupped prop set up question

What RPM'S are you getting at 55 MPH? What RPM is the motor rated at for its HP? What is the weight of the boat? How far back is the setback from the keel including any transom undertuck if any? What is the present location (verticle)of the cavitation plate when the keel and cav. plate are parallel?<br />Answer these questiions and I'll answer yours.