At small RPM, Yamaha’s labyrinth exhaust process minimizes the engine sound. F9.nine contains a water-sealed outer wall round the exhaust muffler. it can help decrease the exhaust sound degrees for just a silent https://tiannaqool698943.blogsidea.com/41217897/the-smart-trick-of-9-9-outboard-yamaha-that-no-one-is-discussing