At low RPM, Yamaha’s labyrinth exhaust program minimizes the engine sound. F9.9 features a h2o-sealed outer wall round the exhaust muffler. it can help lessen the exhaust sounds ranges for a silent operation. This https://murrayltjm020031.pages10.com/top-latest-five-yamaha-9-9-outboard-engine-urban-news-70080886