This manual covers the Hino W04D W040C-T W04C-TI marine engine, designed for robust performance and reliability in marine applications. Engineered by Hino, these engines are built to the highest standards, ensuring durability and efficiency for a wide range of maritime operations. This comprehensive guide details all models and engine types within this series, providing access to the same information used by professional technicians. The purpose of this workshop repair service manual is to provide detailed instructions for the maintenance, troubleshooting, and repair of your Hino W04D W040C-T W04C-TI marine engine. It includes essential information such as general precautions, maintenance checklists, engine body and fuel system servicing, troubleshooting guides, electrical system diagnostics, and detailed specifications. This manual is an indispensable resource for owners, mechanics, and technicians seeking to maintain their engine's optimal performance and longevity.