Running a 15 x 16 double cupped stainless prop. 15X16SSTII. Topping out at 3800 rpm, should be 4400-4600. This boat is new to me and I have no history of why this prop was selected. What aluminum prop would put me in the right range ? 5.7 King Cobra, 260 HP, recent tuneup, under 200 hrs. 5000#...