5900 X 43 ?

[Briguy]

Brad, 43 isn't bad but I don't think you are propped right. You may want to go up to a 19" pitch. Your Merc is happiest at 5500 rpm and 2 inches more pitch will bring it right in line. You can also expect higher cruise mph but a little slower out of the hole. I think you can hit 46mph.