This manual covers the Volvo Penta DP-A sterndrive, a versatile propulsion system designed for a wide range of marine applications. The DP-A is known for its robust construction, utilizing marine-grade aluminum alloy, stainless steel, and durable plastics to ensure longevity in harsh marine environments. Its Duoprop design, featuring twin counter-rotating propellers, enhances maneuverability and efficiency, providing reliable performance for various boat types. This sterndrive is engineered to be paired with a diverse selection of gasoline or diesel engines, offering flexibility in power output from 150 HP to over 300 HP, and accommodating different displacement sizes to suit specific boating needs. The purpose of this comprehensive Workshop Service Repair Manual is to provide detailed guidance for the maintenance, repair, and troubleshooting of the Volvo Penta DP-A sterndrive. It encompasses essential information on lubrication, cooling systems, anode replacement, and electrical system requirements, all presented in English. This manual is an indispensable resource for owners, mechanics, and technicians, offering step-by-step procedures, technical specifications, and safety guidelines necessary to keep the DP-A operating at peak performance and reliability.