This operation manual pertains to the Yanmar 3TNM68 and 3TNM72 diesel engines. These are 3-cylinder, 4-stroke, water-cooled engines designed for reliable performance in various applications. The 3TNM68 features a displacement of 1.267 liters, while the 3TNM72 offers 1.351 liters. These engines utilize a forced lubrication system to ensure longevity and consistent operation.

This comprehensive English operation manual, spanning 82 pages, provides essential information for the operation and maintenance of your Yanmar engine. It covers critical areas including safety precautions, detailed periodic maintenance schedules, fluid capacities and types, filter replacement procedures, troubleshooting guides for common issues, long-term storage instructions, and extensive technical specifications. This manual is an indispensable resource for owners and technicians seeking to maintain the optimal performance and longevity of their Yanmar 3TNM68 or 3TNM72 engines.