This manual covers the Volvo Penta 290-DP series sterndrive engine, encompassing a range of model years. Designed for marine applications, the 290-DP drive, also known as the Duoprop, represents a significant component in Volvo Penta's propulsion systems. Its engineering focuses on delivering reliable performance and efficiency for various watercraft. This guide provides comprehensive information for understanding and maintaining these robust marine power units. The purpose of this service repair manual is to offer detailed guidance for owners, mechanics, and technicians. It includes extensive information on general maintenance, periodic lubrication, troubleshooting, and complete engine service and repair procedures. Furthermore, the manual covers the fuel system, cooling system, emission system, engine control system, transmission service, electrical system, and wiring diagrams, ensuring all aspects of the 290-DP sterndrive are addressed for optimal upkeep and longevity.