Volvo Penta D6-300 Marine Engine

The Volvo Penta D6-300 Marine Engine is a high-performance marine diesel propulsion solution designed to deliver powerful acceleration, smooth operation, and outstanding fuel efficiency for a wide range of leisure and commercial vessels. Built on a robust 5.5-liter inline six-cylinder platform, this engine produces up to 300 horsepower, making it ideal for planing boats, cruisers, and fast displacement hulls that require dependable mid-range torque and responsive throttle control.

Engineered with advanced common-rail fuel injection and turbocharging technology, the D6-300 ensures optimized combustion efficiency, reduced emissions, and quieter performance compared to conventional mechanical diesel engines. The lightweight yet durable cast-iron cylinder block combined with aluminum components helps improve power-to-weight ratio, enhancing vessel handling and overall performance. Its freshwater cooling system with heat exchanger contributes to long-term reliability, even in demanding marine environments.

A key advantage of the D6-300 is its integration with Volvo Penta’s Electronic Vessel Control (EVC) system, providing precise electronic throttle response, easy diagnostics, and compatibility with modern helm displays and joystick maneuvering systems (when configured). This intelligent control architecture simplifies operation for both experienced captains and recreational boaters while improving safety and maneuverability in tight docking situations.

Designed for low vibration and smooth running, the engine incorporates advanced mounting systems and optimized combustion timing, resulting in improved onboard comfort during extended cruising. Maintenance access points are conveniently positioned, reducing service time and operating costs over the engine’s lifespan. The D6-300 is also compatible with a variety of propulsion configurations, including sterndrive and inboard shaft installations, allowing flexible integration into new builds or repower projects.

Overall, the Volvo Penta D6‑300 Marine Engine combines Scandinavian engineering quality, modern electronic control, and proven diesel durability to deliver a reliable propulsion package that meets the performance expectations of demanding marine applications.