Yamaha F350USA4 Outboard Motor. 30-Inch Shaft 4.3-Liter V6 Digital Electronic Control Electronic Fuel Injection Electric Start Power Trim and Tilt Classic White. The Yamaha F350USA4 is the Classic White, 30-inch shaft version of Yamaha's most powerful V6 offshore outboard. Built on the advanced 4.3-liter platform, it offers uncompromising horsepower, torque, and reliability in a refined, lighter-weight package compared to previous V8 engines. With its extra shaft length, the F350USA4 is ideal fo