Hey guys! I know there are only a handfull of you out there with the same boat set up! I acquired this boat a few weeks ago! The motor has a 13 1/4 x 17 stainless 3 blade prop! If i run wot with tilt down, it digs the bow down really bad, if i run it at a smoothe position, wot, it runs 5200 rpm, at 35 mph, if i tilt it up a little more, i get 5600 rpm, at 38 mph, but porpises like a frikin 800 lb dolphin on a 4 ft wave! It just seems like the Yamaha should get more speed! At 5200 rpm , it seems like it has a lot more to put out! Any input appreciated, especially those of you with the 70 on a Copperhead!! Btw love the boat!