I have a 1986 bayliner 1950 capri cuddy with Aq125b motor. Had the head redone on it, the engine builder wanted me to put smaller prop to raise my rpm. I bought the boat with a 15x19 prop. At wot my rpms with 2 people on board and full 32 gallons of gas is 4,300 rpm.. book says 4,800 to 5,000...