Volvo Penta D6-300 – Inboard Diesel Engine 300 HP

Volvo Penta D6-300 300 HP – Durable Displacement Hull Diesel

Solving the need for a fuel-efficient and long-lasting auxiliary power source, the Volvo Penta D6-300 delivers 300 HP at 3300 RPM. This engine is a favorite for American trawler owners and long-distance cruisers who value steady, reliable propulsion over extreme top-end speed. The 5.5-liter 6-cylinder architecture is built to withstand high-duty cycles, ensuring that USA boaters have a dependable partner for the Great Loop or other extended maritime adventures where engine uptime is critical for safety and comfort.

Meeting strict USA EPA Tier 3 emission requirements, the D6-300 utilizes high-precision fuel mapping to ensure clean, odor-free operation in sensitive American coastal environments. The engine features an integrated oil cooler and a robust freshwater cooling system designed to maintain stable thermal profiles during continuous high-load transits. For the American operator, the engine’s digital networking capabilities provide the data accuracy required for modern navigation, ensuring a high level of situational awareness on the glass bridge helm.

Core Technical Specifications

• Maximum Output: 300 HP at 3300 RPM.
• Displacement: 336 cubic inches (5.5 Liters).
• Configuration: In-line 6-cylinder, 4-stroke diesel.
• Aspiration: Turbocharged and aftercooled.
• Dry Weight: Approximately 1300 lbs (excluding gearbox).
• Electrical: 12V / 115A alternator standard.
• Compliance: EPA Tier 3 and RCD2 certified.
• Bore and Stroke: 4.06 x 4.33 inches.