Volvo Penta D4-300 – Marine Diesel Engine 300 HP

Volvo Penta D4-300 300 HP – High-Performance 4-Cylinder Diesel

Eliminating the weight penalty of larger 6-cylinder engines while maintaining high horsepower is the core engineering achievement of the Volvo Penta D4-300. Delivering 300 HP at 3500 RPM, this 3.7-liter powerhouse utilizes a sophisticated common-rail fuel system and dual-charging (supercharger and turbocharger) to provide instantaneous throttle response for American express cruisers. For the USA boater, this translates to faster planing times and superior fuel efficiency during high-speed transits across coastal sounds and bays.

Adhering to strict EPA Tier 3 emission standards, the D4-300 features Volvo Penta’s EVC (Electronic Vessel Control) for ultra-smooth shifting and precise digital management. Engineered for the USA maritime market, this engine package supports seamless NMEA 2000 integration, allowing for real-time data sharing with modern helm electronics. The fresh-water cooling system is designed to withstand high-salinity conditions from the Florida Keys to the Pacific Northwest, ensuring long-term internal component protection against corrosion.

Core Technical Specifications

• Maximum Output: 300 HP at 3500 RPM.
• Displacement: 224 cubic inches (3.67 Liters).
• Configuration: 4-cylinder in-line, 4-stroke diesel.
• Aspiration: Supercharged and Turbocharged with intercooler.
• Dry Weight: Approximately 1060 lbs (engine only).
• Alternator: 115A high-output marine alternator.
• Compliance: Fully certified EPA Tier 3 standards.
• Bore and Stroke: 4.06 x 4.33 inches.