This workshop service repair manual covers the HINO WO6D-TI and WO6D-TI-II marine diesel engines. These engines are designed for demanding marine applications, offering robust performance and reliability. Their engineering reflects HINO's commitment to quality, ensuring efficient operation and durability in various maritime environments. This manual is intended to provide comprehensive information for the proper operation, maintenance, and repair of these specific engine models. The purpose of this manual is to serve as a definitive guide for owners, technicians, and mechanics. It details essential maintenance procedures, troubleshooting techniques, and technical specifications necessary for keeping the HINO WO6D-TI and WO6D-TI-II engines in optimal condition. By following the guidelines and instructions within this document, users can ensure the longevity, safety, and peak performance of their marine diesel engines.