This comprehensive Workshop Service Repair Manual provides a detailed guide for servicing and repairing Yanmar inboard QM, GM-HM, 4JH, and 4JH2 series engines and transmissions manufactured between 1975 and 1992. The manual covers all models, engine types, trims, and transmissions within these series. It includes step-by-step instructions and illustrations to guide you through every repair and service procedure. This manual is designed to make even the most complex repairs accessible, allowing you to perform maintenance and repairs efficiently and effectively.

The Yanmar Inboards QM, GM-HM, 4JH & 4JH2 Series Engines & Transmissions Complete Workshop Service Repair Manual is a comprehensive guide designed for technicians and boat owners seeking to repair and maintain Yanmar marine engines manufactured between 1975 and 1992. This manual covers a wide range of models within the QM, GM-HM, 4JH, and 4JH2 series, providing detailed information on engine components, operation, troubleshooting, and repair procedures. It's an indispensable resource for anyone working on these reliable and popular engines, offering step-by-step instructions with clear diagrams and illustrations to aid in understanding complex tasks.

The manual covers both engine and transmission components, encompassing everything from basic maintenance procedures such as oil changes and filter replacements to more intricate tasks like engine overhaul and transmission rebuilds. It includes detailed specifications, torque values, wiring diagrams, and troubleshooting charts to guide users through various maintenance and repair scenarios. Furthermore, the manual offers valuable insights into common problems and solutions, enabling users to diagnose and address issues efficiently. This comprehensive resource equips both novice and experienced mechanics with the knowledge and tools necessary to keep Yanmar inboards running smoothly and reliably. Whether you're a professional mechanic or a dedicated boat owner, this manual will serve as an invaluable companion for maintaining the performance and longevity of your Yanmar marine engine.