This workshop repair manual covers the MD2010, MD2020, MD2030, and MD2040 marine diesel engines. These naturally aspirated, indirectly freshwater-cooled engines feature indirect injection and are typically equipped with a shaft drive and integrated gearbox. The manual is designed to provide comprehensive information for all models, ensuring owners and technicians have access to the necessary details for operation and upkeep. This comprehensive manual offers detailed, step-by-step instructions and highly detailed exploded diagrams and illustrations to guide users through all repair procedures. It is intended to assist owners, mechanics, and technicians in maintaining and repairing their engines, ensuring optimal performance and longevity. The manual is presented in English.