This service repair workshop manual covers the Yanmar 6HA2M-HTE marine engine, a diesel-powered unit designed for marine propulsion. Yanmar engines are recognized for their robust engineering and reliability, ensuring dependable performance in demanding marine environments. This manual provides comprehensive information to understand and maintain the operational integrity of your Yanmar marine engine. The purpose of this manual is to offer detailed guidance for the maintenance and repair of the Yanmar 6HA2M-HTE. It includes essential information on general disassembly and reassembly, preparation before checking and servicing, service standards, tightening torques for major components, and periodical maintenance schedules. This documentation is intended to assist owners, mechanics, and technicians in effectively servicing and maintaining the engine to ensure its longevity and optimal function.