Yamaha F90XB Outboard Motor. 25-Inch Shaft Remote Control Electric Start Power Trim & Tilt Gray. The Yamaha F90XB Outboard Motor delivers reliable 90-horsepower 4-stroke performance in a 25-inch shaft configuration, making it an excellent choice for boats with higher transoms or offshore applications. With remote control operation, electric start, and power trim & tilt, the F90XB offers a perfect balance of power, efficiency, and smooth handling for a variety of boat types including bay boats, c