The Volvo Penta MD6A and MD7A are robust diesel engines designed for marine applications, known for their reliability and efficient performance. The MD6A offers approximately 12 horsepower, while the MD7A provides around 15 horsepower, both operating at 2000 rpm. These water-cooled engines feature a displacement of 650 cc for the MD6A and 700 cc for the MD7A, making them suitable for a variety of vessel sizes where dependable power is essential. Their engineering emphasizes durability and straightforward operation, contributing to their reputation for longevity in demanding marine environments. This Workshop Service Repair Manual provides comprehensive guidance for the Volvo Penta MD6A and MD7A diesel engines. It covers essential maintenance procedures, detailed troubleshooting methods, and technical specifications to ensure optimal engine performance and longevity. The manual includes information on preventative maintenance, repair techniques, and diagnostic approaches, supported by clear, numbered instructions, detailed illustrations, photos, and exploded diagrams. This resource is invaluable for owners, mechanics, and technicians seeking to maintain, service, and repair these engines effectively and efficiently.