This service repair manual covers the Yanmar 6LY2, 6LY2A, and 6LYA series diesel engines, including variants with STE and STP suffixes. These inline 6-cylinder turbocharged engines, typically featuring a 6.5-liter displacement and common rail direct injection, are engineered for robust performance and reliability in demanding applications. While specific production years are not detailed, this manual is designed to support a range of models within these series, emphasizing their quality construction and efficient operation.

The purpose of this comprehensive English-language manual is to provide detailed information for the maintenance, repair, and troubleshooting of your Yanmar engine. It includes essential technical specifications, routine maintenance procedures such as oil change intervals and recommended fluid types, and guidance on filter replacement. Owners, technicians, and mechanics will find the instructions invaluable for ensuring the optimal performance, longevity, and safe operation of their Yanmar marine propulsion systems.