This manual covers the MAN D2840 LE301 / D2842 LE301 Series marine diesel engines, designed for demanding marine applications. These engines represent robust engineering, built for reliability and efficient operation in challenging maritime environments. Their powerful performance and durable construction make them a superior choice for a wide range of marine vessels requiring dependable propulsion. This comprehensive Service Repair Workshop Manual provides detailed information essential for the maintenance and repair of your MAN marine diesel engine. It includes in-depth coverage of engine specifications, troubleshooting procedures, maintenance schedules, lubrication guidelines, and repair instructions for various systems, including the cooling, fuel, emission, electrical, and transmission systems. Additionally, it offers guidance on operation, transportation, and chassis/body components, ensuring that owners, mechanics, and technicians have the necessary resources to keep these engines in optimal condition.