This manual covers the Yanmar 3TNM68 and 3TNM72 industrial engines. These diesel engines are designed with a 3-cylinder, liquid-cooled configuration for reliable performance in demanding industrial applications. Yanmar is known for its engineering quality and the robust design of these engines ensures durability and efficiency. This comprehensive Factory Operators Owner Instruction Manual provides essential information for the operation and maintenance of your Yanmar engine. It includes detailed procedures, troubleshooting guidance, and technical specifications, supported by over 100 illustrations. The manual is designed to assist owners and technicians in maintaining the optimal performance and longevity of the engine.