I have a 21' cajun, had a 150 johnson fast strike on it with a 14 1/2 X 19 prop on it, ran 44 mph with 3 people and 20-30 gals of fuel. I recently got a 175 hp fast strike it came with a 14 3/4 x 17 prop on it, I have not tested it yet, I was wondering if larger dia. will compensate for smaller...