Yamaha F350USA Outboard Motor. 30-Inch Shaft 4.3-Liter V6 Digital Electronic Control Electronic Fuel Injection Electric Start Power Trim and Tilt Gray. The Yamaha F350USA is a 30-inch shaft offshore outboard built for serious boaters who demand maximum power, torque, and reliability. Powered by Yamaha's 4.3-liter V6 engine, it delivers unmatched performance in a lighter package than previous V8 models, making it ideal for large center consoles, offshore fishing boats, and other heavy-duty applic