Marine Diesel Inboard Engine Volvo Penta 230 HP Model: D4-230 Aquamatic

Volvo Penta D4-230 Aquamatic

The D4-230 is an in-line 4-cylinder, 3.7-liter diesel engine designed specifically for marine applications. It is typically paired with the DPI or DPH DuoProp sterndrive for high torque and smooth maneuverability.

Key Features & Performance

• Unique Marine Torque: Engineered for high torque at low RPM, allowing the boat to reach planing speeds quickly even under heavy loads.

• Electronic Vessel Control (EVC): Fully integrated system that manages engine, electronics, and optional features like the Glass Cockpit, Joystick Docking, and Dynamic Positioning System (DPS).

• Silent Shift: The DPI drive features a hydraulic clutch for silent and smooth gear shifting.

• DuoProp Technology: Twin counter-rotating propellers provide superior grip, straight-line tracking, and improved fuel efficiency compared to single-prop systems.

Maintenance & Durability

• Robust Build: Features a cast iron cylinder block and head with a ladder frame for added strength.

• Serviceability: Integrated water inlet, easy-access service points, and a maintenance assistant via the EVC display.

• Cooling: Thermostatically regulated freshwater cooling with a seawater-cooled tubular heat exchanger.

Performance Data (Approximate)

• Fuel Consumption: Roughly 45–50 L/h at full throttle (3400 RPM).

• Speed Range: Typically optimized for vessels operating between 25–45 knots.