I have a 25 foot, 8.5 ft beam, 4500lb dry boat. it has a 5.7ltr 350, and should run about 4500 rpm. It doesnt want to get up on plane. i've got a 14 1/2 x 15 prop on it now. Any suggestions as to what would work better to get it up on plane and stay up. I've looked at all the charts, but I...
