Own a 18ft cc (1200 lb hull wt)with a dt115 suz (370 lbs).<br />I am having problems with top end speed and rpm. Specs say should be 5200 to 5750 rpm. The prop is a 17 in. alum 3 blade just recond. It's a long story and alot of work and testing done to this engine but top end speed is 37 mph...
