The YANMAR 6LY series represents a line of robust in-line 6-cylinder diesel engines designed for marine applications. These engines, including variants such as the 6LYM-UTE, 6LYM-STE, 6LY3-ETP, 6LY3-STP, 6LY3-UTP, 6LY2-STE, 6LY2A-STP, and 6LYA-STP, feature advanced engineering with DOHC valvetrain and common rail direct injection for newer models. With displacements of 7.07 liters, these turbocharged and intercooled engines deliver substantial power output, suitable for a wide range of marine vessels. Their construction emphasizes reliability and performance, making them a dependable choice for demanding maritime operations.

This Workshop Service Repair Manual provides comprehensive guidance for the YANMAR 6LY series marine diesel engines. It covers essential maintenance procedures, detailed troubleshooting steps, critical technical specifications, and vital safety information. The manual is intended for sales, service, inspection, and maintenance engineers, offering the necessary knowledge to effectively maintain and repair these engines. By following the procedures outlined within this document, owners and technicians can ensure optimal performance, longevity, and safe operation of their YANMAR 6LY engines.