Yamaha F350XSA Outboard Motor. 25-Inch Shaft 4.3-Liter V6 Digital Electronic Control Electronic Fuel Injection Electric Start Power Trim and Tilt Gray. The Yamaha F350XSA is the most powerful V6 outboard Yamaha has ever built, engineered for offshore boaters who need maximum horsepower, torque, and reliability. Featuring a 4.3-liter V6 engine, it delivers class-leading performance while reducing weight compared to previous V8 designs. With Digital Electronic Control, operators experience precise