This manual covers Volvo Penta MD21A, AQD21A, MD32A, and AQD32A marine diesel engines designed for marine propulsion. These engines are engineered for reliability and performance in demanding marine environments. Their robust construction and efficient design ensure dependable operation for a wide range of boating applications. This comprehensive Full Service & Repair Workshop Manual provides detailed instructions for all repairs, servicing, and troubleshooting procedures. With hundreds of pages featuring detailed photos, diagrams, and step-by-step guidance, it is an essential resource for owners, mechanics, and technicians. The manual is designed to facilitate the proper maintenance and repair of your Volvo Penta marine diesel engine, ensuring its longevity and optimal performance.