This workshop service manual covers the Mitsubishi L3 Series diesel engines, including the L3A, L3C, and L3E models. These naturally aspirated, water-cooled engines, typically displacing 1.34 liters, are known for their robust construction and reliability, making them suitable for a variety of applications such as industrial equipment, small vehicles, and generators. With indirect injection and a forced lubrication system, these engines are engineered for consistent performance and durability across their operational lifespan. This manual provides comprehensive guidance for the maintenance, repair, and servicing of the Mitsubishi L3 Series engines. It details essential technical specifications, lubrication requirements, filter types, and recommended service intervals for oil changes, air filter cleaning, and coolant replacement. Owners, mechanics, and technicians will find detailed procedures and information necessary to ensure optimal engine performance, longevity, and efficient operation.