Yamaha F250USB4 Outboard Motor. 30-Inch Shaft DEC (Digital Electronic Control) Electric Start Power Trim & Tilt Classic White. The Yamaha F250USB4 combines offshore-grade performance with refined styling for boaters who demand both power and aesthetics. Built on Yamaha's legendary 4.2L V6 four-stroke platform, this 250-horsepower outboard delivers rapid acceleration, strong midrange pull, and smooth, fuel-efficient cruising-making it ideal for offshore fishing boats, deep-V hulls, and multi-engi