This manual covers the YANMAR YSM Series Marine Diesel Engines. These engines are engineered for reliability and performance in demanding marine environments. Designed for a wide range of applications, the YSM Series represents YANMAR's commitment to quality and durability, ensuring optimal operation for various vessel types. This comprehensive Full Service & Repair Workshop Manual provides detailed instructions for all repairs, servicing, and troubleshooting procedures. It includes step-by-step guidance, detailed photos, diagrams, and exploded views to assist owners, mechanics, and technicians in maintaining and repairing their YANMAR YSM Series engines. The manual is designed to ensure the longevity and efficient performance of your marine diesel engine.