The Yanmar 6LF Series is a compact, high-output common-rail marine diesel engine range designed for planing and semi-planing vessels. It is suitable for large superyacht tenders, motor yachts up to approximately 55 feet and light-duty commercial craft. Its combination of high power, relatively low weight and compact installation dimensions makes the series suitable for new builds and carefully engineered repower projects.
The series includes the Yanmar 6LF485, rated at 485 MHP (356 kW), the Yanmar 6LF530, producing 530 MHP (390 kW), and the Yanmar 6LF550, rated at 550 MHP (404 kW). All three models use a 6.728-litre, six-cylinder platform and achieve their rated output at 3,000 rpm. These model names provide natural internal-linking opportunities while helping buyers compare the available 6LF power ratings.
Selecting the correct Yanmar 6LF marine engine requires the vessel’s hull form, displacement, desired cruising speed, propeller demand and operating duty to be reviewed. The engine is electronically controlled through the Yanmar VC20 Vessel Control System and supports integration with NMEA and J1939 CAN-bus networks. Buyers considering the 6LF550 for commercial service should note that Yanmar states this model is not EPA Commercial certified, so the required regional and application-specific certification must be confirmed.
A Yanmar 6LF engine and gearbox package can be configured for shaft-drive or jet-drive propulsion with model-compatible ZF marine gears. Available options may include single-pole or two-pole electrical configurations, secondary alternators and application-specific installation packages. The proposed gearbox, reduction ratio, control stations, display, wiring harness, engine mounts, mixing elbow and other included accessories should be clearly identified in the quotation.
When requesting a Yanmar 6LF engine for sale, provide the vessel type, required power, recreational or commercial duty, current engine and gearbox, desired reduction ratio, propeller specifications, installation dimensions and delivery destination. The quotation should confirm the exact 6LF model, rated output, emissions certification, engine condition, gearbox configuration, included components, warranty, availability, lead time, packing method and delivery terms.
