Yamaha 300HP Outboard Review: Horsepower and Velocity Built-In – Yamaha 300HP Outboard For Sale Introduction In the world of high-end marine performance, few name brands are as tall as Yamaha. For nearly a half century, Yamaha has led the outboard engine pack with top-shelf engineering, bulletproof reliability, and ahead-of-the-curve innovation. Among its most popular products—the