I have a 1980 with a 150 g2 6 in jack plate 24 in raker prop and cant get more than 53mph with one person in boat. i have tried anywhere from 3.25 to 4.50 below pad with same results. the one constant issue is no bow lift at any trim angle or height. Great hole shot and midrange but no top end. Getting 5800 to 6000 rpm depending on plate height. The only thing i can think of is bad prop out of the box. Any help or anybody having same issue. Thanks jim