This workshop service repair manual covers the Mitsubishi L3A, L3C, and L3E diesel engines. These engines are engineered for robust performance and reliability, designed for applications where dependable power is essential. While specific production years are not detailed, this manual addresses the core components and operational characteristics of these water-cooled diesel powerplants, ensuring their continued efficient function. This comprehensive English-language manual provides detailed information for maintaining and repairing the specified Mitsubishi engines. It includes essential procedures for scheduled maintenance, troubleshooting common issues, and understanding technical specifications. Owners, mechanics, and technicians will find the guidance necessary to perform service operations accurately and effectively, preserving the longevity and performance of the L3A, L3C, and L3E engines.