Yamaha LF250USB Outboard Motor. 30-Inch Shaft Counter Rotation DEC (Digital Electronic Control) Electric Start Power Trim & Tilt Gray. The Yamaha LF250USB is a counter-rotation powerhouse built for large offshore vessels that demand balance, precision handling, and reliable performance. Powered by Yamaha's 4.2L V6 four-stroke platform, this 250-horsepower outboard delivers exceptional torque, responsive acceleration, and fuel-efficient cruising-ideal for center consoles, sportfishing boats, and