Volvo Penta D4-225 – Marine Diesel Engine 225 HP

Description

Need a diesel inboard engine with a verified 225 horsepower rating? The Volvo Penta D4-225 provides a 3.7-liter inline 4-cylinder block engineered for displacement cruisers, commercial workboats, and motor yachts. Operating at 3500 RPM max, this turbocharged and aftercooled motor delivers strong torque throughout its powerband. Common-rail fuel injection cuts combustion noise and exhaust smoke for comfortable cruising.

Freshwater heat exchanger cooling keeps seawater out of internal engine waterways, preventing scale and corrosion. The engine features an SAE 3 flywheel housing, a 115-amp alternator, Electronic Vessel Control digital management, and a dry weight of 482 kg.

Key Specifications of the Volvo Penta D4-225 Inboard Marine Engine

• The 3.7-liter 4-cylinder engine produces 225 horsepower at 3500 RPM, delivering reliable mechanical power for displacement and planing hulls.
• Turbocharged and aftercooled air induction provides high air density to cylinders, ensuring efficient combustion and strong low-end torque.
• Common-rail direct fuel injection optimizes fuel delivery, drastically reducing engine vibration, smoke output, and mechanical noise on board.
• Closed freshwater cooling isolates the engine block from raw seawater, preventing internal metal corrosion over years of operation.
• An onboard 115-amp alternator supplies steady electrical charging power to keep start batteries and navigation electronics topped off.
• The standard SAE 3 flywheel housing couples smoothly with HS45 and HS63 hydraulic marine gears for shaft-drive installations.

Engine Performance and Engineering

Heavy-duty cylinder construction and electronic fuel management define the durability of this Volvo Penta inboard engine. The 13-liter coolant capacity maintains thermal stability, while EVC digital integration transmits vital telemetry to bridge screens.

Why Choose the Volvo Penta D4-225 Inboard Marine Engine

Boat owners choose the D4-225 marine engine for its durable 3.7-liter 4-cylinder block and steady 225 horsepower output. Its turbocharged common-rail design offers clean, smoke-free operation and low fuel consumption. Closed freshwater cooling, SAE 3 gear compatibility, and digital controls make it a dependable repower option.

Mounting and Compensation Considerations

Verify stringer width and check engine mount drop heights relative to the propeller shaft flange. Confirm raw water intake sea cock sizing and ensure the exhaust elbow maintains proper height above the waterline.

Warranty and Support

Volvo Penta backs this engine with a 2-Year Factory Limited Warranty covering major internal mechanical assemblies. Mulmarine.com provides pre-purchase technical guidance and freight shipping customer support. Prior to freight shipment, staff verify the crated engine package against the confirmed order details. Review the applicable warranty information on Mulmarine.com before completing your order.

Before Ordering the Volvo Penta D4-225 Inboard Marine Engine

Measure your engine compartment dimensions to ensure proper clearance around the heat exchanger and air filter. Confirm your hydraulic transmission gear ratio, shaft coupling bolt pattern, and fuel supply line size before ordering.