syringa,
Im going to try this on my 99 20'wellcraft excalibur with a 7.4mpi and bravo 1 the prop I have on it now is a mirage plus 48-13702 21p. Im putting a thru hull exhaust on it now and wanted to take advaantage of the rpms. is there any problems with switching these props?

crmax>. Should be no problem at all. If you don't already know of it Hill propellers has a great speed/slip calculator. at www.hillpropellers.com. just first put in good known numbers from your setup and try different variables. If you haven't done it before the results may surprise you

if I get those results Ill be very happy