This manual covers the Yanmar 2TD, 3TD, and 4TD series marine diesel engines, designed for marine propulsion. These engines are engineered for reliability and performance in demanding marine environments. Their robust construction and efficient diesel technology ensure dependable operation for a wide range of vessel applications. This comprehensive Service Repair Workshop Manual provides detailed information for the maintenance and repair of your Yanmar marine diesel engine. It includes step-by-step instructions, detailed illustrations, and complete disassembly procedures for all major systems, including the fuel, lubrication, cooling, and electrical systems, as well as the reduction and reversing gear. This manual is an essential resource for owners, mechanics, and technicians to ensure optimal engine performance and longevity.