Yamaha 250HP LF250UCB – V6 Counter 30in Shaft

Yamaha 250HP LF250UCB V6 Counter 30in Shaft

Designed for multi-engine platforms with extreme transom heights, the Yamaha 250HP LF250UCB features a 30-inch ultra-long shaft and counter-rotation. This 4.2L V6 Offshore engine acts as the perfect port-side counterbalance, neutralizing propeller torque to ensure superior tracking and stability for large coastal cruisers. The 4166cc DOHC architecture focuses on torque density and hydrodynamic efficiency, utilizing Plasma Fusion cylinder walls to reduce weight and internal friction, delivering the explosive performance expected of a premium offshore powerplant.

Refined for high-performance efficiency, the LF250UCB utilizes Digital Electronic Control (DEC) to provide smooth, responsive shifting and throttle management for twin or triple engine arrays. The motor is treated with specialized anti-corrosion coatings and marine-grade alloys to defend against oxidation in high-salinity zones. Maintenance effort is reduced by the TotalTilt system and conveniently located service points. This unit features a high-output 70-amp alternator (net), providing a stable charging system for multiple battery banks, navigational safety equipment, and high-demand onboard accessory loads during offshore transits.

Key Features of Yamaha LF250UCB

• 4166cc 24-Valve 60-Degree V6.
• 250 Horsepower Prop Shaft Rating.
• 30-Inch Shaft 583 lbs Weight.
• Counter-Rotation Gearcase for Twin Setups.
• Digital Electronic Control (DEC) System.
• 70 Amp Total Output Alternator (Net).
• 1.75:1 Ratio Performance Gearcase.