Is your boat not fast enough for you? Does your 9.9 not please you? Watch this video to turn your 9.9hp into a 15hp with only one simple part…(I did this with my other 1976 9.9hp motor(Same thing) on a 14 foot tin and the speed went from 21.7mph to 29.2mph. A 8.5mph difference.) Try it, love it. 🙂
