Yamaha LF300UCB 300HP V6 Counter 30″ Shaft Outboard Motor

Yamaha 300HP LF300UCB V6 Counter 30in Shaft

Engineered for the tallest transoms on premium offshore vessels, the Yamaha 300HP LF300UCB features a 30-inch ultra-long shaft and counter-rotation. This 4.2L V6 powerhead is optimized for multi-engine platforms, delivering the massive displacement and torque density required to move large center consoles and coastal cruisers. The 4166cc architecture utilizes Variable Camshaft Timing (VCT) to maximize mid-range punch and hole-shot performance, ensuring that every bit of horsepower is efficiently translated into thrust while the counter-rotating gearcase provides a balanced and stable driving experience in turbulent sea states.

Refined for professional-grade reliability, the LF300UCB leverages advanced Electronic Fuel Injection (EFI) to coordinate power delivery for immediate throttle response and consistent ignition. The motor is protected by specialized marine-grade alloys and multi-stage anodic protection to mitigate galvanic wear during prolonged offshore exposure. Ownership effort is reduced by the long-term service intervals and the integrated TotalTilt system for simplified engine management. This model features a high-output 70-amp alternator (net), ensuring massive power reserves to support multiple battery banks and complex navigational arrays.

Key Features of Yamaha LF300UCB

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