1444 g3 jon boat, 9.8 tohatsu, short shaft, 4 stroke. with 1 guy i run@5400-5500 rpm, 18-19mph. when i have 2 guys in the rig i run @4500-4600 rpm,9.9 mph. gps checked, tiny tach. my question, should i go to a different size prop?i have the stock prop. i have tried different trim settings with 1...