I have a 99 20ft savage with a 150 etec. Running with no jack plate. 14.8x17 Evinrude 3 blade prop. Turning 5900rpm at 50 mph with heavy load. 54 with light load. Great hole shot. My only complaint is porpoising when running slower.
Will switching to a 4 blade prop help? Is a jack plate a must as well?