This comprehensive service manual covers the Volvo Penta MD21A-32A and AQD21A-32A marine diesel engines. Designed for reliability and performance, these engines are built to meet the demanding requirements of marine applications, offering robust construction and efficient operation. Their engineering reflects Volvo Penta's commitment to quality, ensuring dependable power for a wide range of vessels.

The purpose of this manual is to provide detailed information for the maintenance, repair, and servicing of your Volvo Penta engines. It includes essential procedures, technical specifications, and troubleshooting guidance to assist owners, mechanics, and technicians in keeping the engines in optimal condition. By following the instructions within, users can ensure the longevity and proper functioning of their marine propulsion system.