This manual covers Volvo Penta 280, 280T, 280PT, 285, and 285A sterndrive systems. These robust units are engineered for reliable performance in demanding marine environments. While specific production years are not detailed, this guide encompasses multiple generations and variants, ensuring comprehensive support for these widely utilized sterndrive configurations. The focus is on the mechanical and operational aspects of the sterndrive system, including its lower gear system, forward gear system, and shift mechanism. This comprehensive Service Repair Workshop Manual in English provides detailed instructions for the maintenance, repair, and servicing of the specified Volvo Penta sterndrive models. It includes full service and repair instructions, diagrams, illustrations, wiring schematics, technical specifications, and information on special tools. The manual is designed for mechanics, independent auto service professionals, and vehicle owners, offering step-by-step procedures for assembly and disassembly, troubleshooting guidance, and coverage of components such as the transom shield, trim system, and internal drive parts.