The YANMAR 4JH3 Series represents a line of robust marine diesel engines designed for reliable performance in demanding maritime applications. Available in variants such as the 4JH3-TE, 4JH3-HTE, and 4JH3-DTE, these 4-cylinder, 4-stroke engines offer a displacement of 2.87 liters. They feature indirect injection diesel technology and come with turbocharged or naturally aspirated aspiration options, delivering power outputs ranging from 39 kW (52 hp) to 63.3 kW (85 hp). Engineered for durability and efficiency, the 4JH3 Series is a testament to YANMAR's commitment to quality marine propulsion.

This Service Repair Manual provides comprehensive guidance for the YANMAR 4JH3 Series marine diesel engines. It covers essential information for maintenance, troubleshooting, and repair, including detailed procedures for assembly and disassembly, engine specifications, and wiring diagrams. The manual is intended to assist owners, mechanics, and technicians in ensuring the optimal performance, longevity, and safe operation of their 4JH3 Series engines through proper servicing and repair practices.