Volvo Penta D2-50 MS25L Marine Diesel Engine – 50HP

Compact, Fuel-Efficient Inboard Power for Sailboats and Commercial Vessels

The Volvo Penta D2-50 MS25L Marine Diesel Engine, rated at 50 horsepower (37.5 kW), is a robust and fuel-efficient 4-cylinder in-line engine, engineered for responsive acceleration, quiet operation, and long-lasting reliability. Featuring a 2.2-liter naturally aspirated diesel engine, mechanical fuel injection, and freshwater cooling, this model is a dependable inboard propulsion system for sailboats, workboats, and light commercial vessels.

With its compact design, low vibration levels, and strong low-RPM torque output, the D2-50 MS25L ensures smooth handling in marinas and under adverse weather conditions. It pairs seamlessly with the MS25L mechanical transmission, delivering power with precision and control.

Key Features of the Volvo Penta D2-50 MS25L

Smooth, Quiet, and Comfortable Operation

• Advanced rubber isolation mounts and balanced engine geometry reduce noise and vibration

• Inlet air silencer enhances onboard comfort, making it ideal for long passages and liveaboard applications

High Torque for Maneuverability and Control

• Offers immediate response at low RPM, enabling tight maneuvering in confined spaces

• Perfect for docking, marina entry, and operations in headwinds or heavy currents

Rugged Construction for Harsh Marine Environments

• Built with a one-piece cylinder head and a rigid cast-iron engine block

• Designed to endure saltwater exposure, load variations, and continuous operation

Reliable Charging System for Onboard Electronics

• Equipped with a 115A alternator with an electronic sensor

• Provides 35A at idle and up to 100A at cruising speeds, keeping navigation and electrical systems fully charged

Freshwater Cooling for Longevity

• Closed-loop cooling system minimizes internal corrosion and maintains engine temperature

• Extends service life and reduces the risk of overheating in demanding conditions

Simple Maintenance with Genuine Volvo Penta Parts

• All service points are easily accessible, minimizing downtime and labor costs

• Compatible with genuine Volvo Penta spare parts, lubricants, and accessories for long-term reliability

• Optional fuel pre-filter kit protects the injection system from water and contaminants

Technical Specifications – Volvo Penta D2-50 MS25L

Ideal Applications

The Volvo Penta D2-50 MS25L is suitable for a range of marine applications, including:

• Sailboats – Provides quiet cruising and reliable power under sail

• Workboats & Utility Vessels – Ideal for towing, harbor support, or passenger transport

• Fishing Boats – Offers efficient operation with minimal maintenance

• Small Commercial Vessels – Meets power demands while maintaining low fuel consumption