This service repair manual covers the Yanmar SY Series equipment. Designed for reliability and performance, Yanmar products are engineered to meet demanding operational needs across various applications. This manual provides essential information for understanding and maintaining your SY Series machine, ensuring its continued efficiency and longevity. This comprehensive English-language manual details critical aspects of SY Series equipment maintenance and repair. It includes an introduction, safety guidelines, general service information, and specific procedures for periodic maintenance, engine systems, fuel, cooling, lubrication, turbocharger, starter motor, alternator, and the Engine Management System (EMS). A detailed troubleshooting guide is also provided to assist in diagnosing and resolving potential issues, making it an indispensable resource for owners and technicians.