This manual covers the Yanmar 6KHL-STN Marine Diesel Engine, designed for marine propulsion. Engineered with precision and built for reliability, this diesel engine utilizes diesel fuel to deliver consistent performance in demanding marine environments. Its robust construction and advanced design ensure efficient operation and longevity, making it a trusted choice for a wide range of maritime applications. The purpose of this Service Repair Workshop Manual is to provide comprehensive guidance for the maintenance and repair of your Yanmar 6KHL-STN engine. It includes detailed procedures for disassembly and reassembly, inspection, and routine servicing, along with standard service data and critical information on bolt tightening torques. With hundreds of photos and illustrations, step-by-step instructions, and a periodical inspection table, this manual is an essential resource for owners, technicians, and mechanics to ensure optimal performance and longevity of the marine diesel engine.