This service manual covers the Hino W04C-TI marine engine, designed for reliable operation in marine environments. It provides comprehensive information for maintaining and repairing this specific engine model. The manual is intended for owners and technicians who require detailed guidance to ensure the optimal performance and longevity of the Hino W04C-TI marine engine. The scope of this manual encompasses a wide range of essential topics, including engine identification, general precautions, disassembly and assembly procedures, maintenance schedules, and troubleshooting guides. It also details specific systems such as the fuel, cooling, and electrical systems, along with servicing specifications and tightening torques. This resource aims to empower users with the knowledge necessary for effective maintenance and repair, promoting self-sufficiency and cost savings.