This service manual covers Lombardini FOCS Series diesel engines, which are internal combustion engines designed for marine, industrial, and agricultural applications. Engineered for reliability and performance, these liquid-cooled engines offer a range of displacements and configurations, including naturally aspirated and turbocharged options. Their robust construction and versatile application make them a dependable choice for demanding operational environments. This comprehensive English-language service manual provides essential information for the maintenance and repair of your Lombardini engine. It details critical procedures, technical specifications, and troubleshooting guidance necessary to ensure optimal performance and longevity. By following the instructions within this manual, owners, mechanics, and technicians can effectively maintain and service their Lombardini engines.