This manual covers the Yanmar 2T and 3T Marine Diesel Engines, designed for reliable marine propulsion. These engines represent a commitment to robust engineering and dependable performance in demanding marine environments. Yanmar's dedication to quality ensures these units are built to last, providing efficient and powerful operation for a variety of maritime applications. This Service Repair Workshop Manual provides comprehensive guidance for the maintenance and repair of your Yanmar 2T and 3T engines. It details periodic checking and servicing, maintenance standards for major components, troubleshooting procedures for engine troubles, and instructions for engine disassembly, reassembly, and storage. The manual also covers fuel and lubricating oil specifications, along with an outline of major engine structures, making it an essential resource for owners and technicians alike.