This manual covers the Volvo Penta MD6A and MD7A Marine Diesel Engines. These internal combustion engines are designed for marine propulsion and utilize diesel fuel. They feature a 4-stroke diesel cycle, compression ignition, and a forced lubrication system. The engines are equipped with an electric starter motor and an alternator, and employ a raw water or freshwater cooling system along with a water-cooled exhaust manifold and elbow.

This Service Repair Workshop Manual provides comprehensive guidance for the maintenance and repair of your Volvo Penta marine diesel engine. It details essential procedures, technical specifications, and troubleshooting information necessary for optimal performance and longevity. The manual is designed to assist owners, mechanics, and technicians in understanding the engine's systems, including the fuel system with its injection pump and injectors, ensuring proper upkeep and efficient operation.