Yamaha F300ECB 300HP V6 Offshore 25″ Shaft Outboard Motor

Yamaha 300HP F300ECB V6 Offshore 25in Shaft

The Yamaha 300HP F300ECB is a robust 4.2L V6 powerhouse featuring a 25-inch shaft, engineered for offshore center consoles and large coastal cruisers that demand traditional digital control. Utilizing a 4166cc big-bore displacement, this engine delivers massive torque density without the added weight of conventional steel cylinder liners, thanks to Yamaha’s signature Plasma Fusion technology. Its mechanical soul is built for structural integrity and high-speed reliability, providing the mid-range punch and top-end performance expected of the legendary Offshore series in a streamlined, sleek package.

Focused on superior operational durability, the F300ECB utilizes Multi-Point Precision EFI and Variable Camshaft Timing (VCT) to ensure reliable starting and optimal throttle response across the power band. The motor is treated with specialized anti-corrosion coatings and marine-grade alloys to prevent galvanic wear during extended saltwater exposure. Maintenance is made effortless by the front-mounted freshwater flush port and easy-access top-mount oil filter. This unit includes a high-output 50-amp alternator, providing a stable charging system for navigational electronics, livewells, and essential shipboard safety equipment.

Key Features of Yamaha F300ECB

• 4166cc 24-Valve 60-Degree V6.
• 300 Horsepower Prop Shaft Rating.
• 25-Inch Shaft 571 lbs Weight.
• Digital Electronic Control (DEC) System.
• Variable Camshaft Timing (VCT).
• 50 Amp Total Output Alternator.
• 1.75:1 Ratio Performance Gearcase.