Vetus M4.15 Marine Engine

The Vetus M4.15 marine engine is a compact, reliable 4-cylinder diesel propulsion system designed for small to mid-sized recreational vessels, sailboats, and light commercial craft. Known for its durability, smooth operation, and fuel-efficient performance, the M4.15 provides dependable propulsion for both primary and auxiliary marine applications.

At the core of the M4.15 is a 4-cylinder, 4-stroke diesel engine with a displacement of approximately 1.5 liters. The engine features precision fuel injection and a naturally aspirated design to optimize combustion efficiency, delivering strong low- and mid-range torque while maintaining fuel-efficient operation. Producing around 40–45 horsepower, the M4.15 is suitable for displacement hulls, small cruisers, and auxiliary sailboat applications, providing consistent and reliable propulsion under varying load conditions.

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

Durability and serviceability are central to the M4.15’s design. Heavy-duty components and marine-grade materials ensure long-term reliability even during extended operation. Service points are conveniently accessible for onboard maintenance, while the mechanical fuel system reduces electronic complexity, simplifying troubleshooting and routine servicing. The engine can be paired with compatible marine gearboxes or saildrives to accommodate various vessel propulsion requirements.

Ideal for small yachts, sailboats, tenders, and light commercial vessels, the Vetus M4.15 Marine Engine delivers a combination of reliable performance, fuel efficiency, smooth operation, and long-term durability. Its advanced engineering ensures confident and dependable propulsion for a wide range of recreational and light commercial marine applications.