This workshop service manual covers the Mitsubishi L3A/L3C/L3E engine series, a robust and reliable diesel engine designed for demanding applications. These 4-stroke, water-cooled engines feature an inline 3-cylinder configuration with indirect injection and typically operate as naturally aspirated units. With a displacement of 1.657 liters, they produce approximately 30-33 horsepower at 3000 RPM, making them suitable for a wide range of industrial equipment, agricultural machinery, generators, and marine auxiliary uses. The engineering quality ensures durability and consistent performance in various operational environments. This comprehensive manual provides in-depth service and repair information essential for maintaining the optimal performance and longevity of your Mitsubishi L3A/L3C/L3E engine. It details critical maintenance procedures, including oil and coolant capacities, filter types, and recommended service intervals. Technical specifications, troubleshooting guidance, and diagnostic procedures are also included to assist owners, mechanics, and technicians. The English-language manual is designed to be a professional-quality resource, enabling effective upkeep and repair of these versatile diesel engines.