This workshop repair service manual covers the Volvo Penta 280-DP, a marine outboard/sterndrive engine featuring a Duo Prop sterndrive transmission. The manual focuses on repair and overhaul, providing detailed instructions for mechanical technicians. It emphasizes special aspects of the product and proprietary component instructions, often referencing specific Volvo Penta special tool numbers. The purpose of this manual is to guide users through the maintenance and repair of the Volvo Penta 280-DP. It includes coverage for routine tune-ups, scheduled servicing, lubrication systems, and diagnostic and repair procedures. Essential safety equipment, such as torque wrenches, is also recommended. The content is presented in English and is designed to ensure accuracy in servicing and repair operations.