Yamaha LF250UCB Outboard Motor. 30-Inch Shaft Counter Rotation DEC (Digital Electronic Control) Electric Start Power Trim & Tilt Gray. The Yamaha LF250UCB is a counter-rotation powerhouse designed for twin-engine offshore boats that demand balance, precision handling, and dependable performance. Built on Yamaha's legendary 4.2L V6 four-stroke platform, it delivers 250 horsepower with smooth acceleration, strong midrange torque, and impressive fuel efficiency-making it a top choice for large cent