I have tried researching this but can't find an answer. I have a 16 foot pontoon that I bought new last year. It came with a 25 hp motor with a 9 pitch prop. The boat will only go 8 mph. I want more speed than that. I am of course not looking to pull skiers or enter a race lol. Dry weight of boat w/o motor is 1250. Motor 5000 t0 6000 rpm. Any advice would be appreciated. Thanks