I have a 15 foot pontoon boat . 7 foot beam, dry weight about 800 pounds. It has a 15 hp mercury 4 stroke. It came with a 9 pitch 3 blade. I bought a 7 pitch 4 blade . both seem to me to be not what I`m looking 4 . I think it should go faster then what it does. I rented a 16 footer with a 9.9...
