I purchased a 1989 Reinell 215C OMC 350 260 HP a couple of months ago. I don't believe I am getting the performance I should get out of this boat and drive train. At WOT I am hitting 38 MPH at 3800 RPM with a 14.5 x 19 prop and 35 mph at 4100 rpm with a 15 x 17 prop.<br /><br />The block has...