This manual covers the marine diesel engines, including the 2, 3, and 4 variants. These in-line diesel engines are water-cooled and feature direct injection fuel systems and forced lubrication. Engineered for reliability and performance in marine applications, the Series is designed to provide dependable power for a variety of vessels. The reduction and reversing gear ensures efficient power transmission for optimal maneuverability. This comprehensive Service Repair Manual offers detailed guidance for the maintenance and repair of your engine. It includes extensive information on all major systems, such as the basic engine, fuel, lubrication, cooling, and electrical systems, along with stern equipment and troubleshooting procedures. With actual real photo illustrations and electrical/hydraulic diagrams, this manual empowers owners and technicians to perform inspections, routine maintenance, and repairs effectively, promoting self-sufficiency and cost savings.