Vetus M3.09 Marine Engine

The Vetus M3.09 marine engine is a compact and reliable 3-cylinder diesel propulsion system designed for small to mid-sized recreational vessels, sailboats, tenders, and light commercial craft. Known for its durability, smooth operation, and fuel-efficient performance, the M3.09 delivers dependable propulsion for both primary and auxiliary marine applications.

At its core, the M3.09 features a 3-cylinder, 4-stroke diesel engine with a displacement of approximately 1.1 liters. It produces around 30–35 horsepower, providing sufficient torque and power for displacement hulls, small cruisers, and auxiliary sailboat propulsion. The engine’s naturally aspirated design with precision fuel injection ensures efficient combustion, smooth low- and mid-range torque delivery, and reliable operation across varying load conditions.

The marine-adapted design includes a freshwater cooling system with a heat exchanger, which protects internal components from corrosion and maintains stable operating temperatures in both freshwater and saltwater environments. Its compact and lightweight construction allows for easy installation in confined engine compartments, making it ideal for new builds, repowers, or engine upgrades. Balanced internal components and vibration-dampening mounts contribute to quiet, smooth operation, enhancing onboard comfort.

Durability and serviceability are central to the M3.09’s design. Heavy-duty materials and robust construction ensure long-term reliability during continuous operation. Service points are conveniently located for easy onboard maintenance, while the simple mechanical fuel system reduces electronic complexity, simplifying troubleshooting and routine servicing. The engine can be paired with compatible marine gearboxes or saildrives, offering flexible propulsion options for a variety of vessel configurations.

Ideal for small yachts, sailboats, tenders, and light commercial vessels, the Vetus M3.09 Marine Engine delivers a reliable combination of compact size, fuel efficiency, smooth operation, and long-term durability, making it a trusted propulsion solution for recreational and light commercial marine applications.