This manual pertains to the Yanmar YSM, a product category encompassing service repair. Yanmar is recognized for its commitment to engineering quality and reliability, ensuring robust performance across its product lines. The YSM is designed to meet specific operational demands, reflecting the brand's dedication to providing durable and efficient solutions for its users. The purpose of this English language Service Repair manual is to provide comprehensive guidance for understanding and resolving issues with your Yanmar YSM. It covers a wide range of topics, including general information, basic engine components, fuel, governor, intake and exhaust systems, lubrication, cooling, starting, reduction and reversing gears, remote control, electrical systems, installation, operating instructions, disassembly, reassembly, inspection, and servicing. This manual is an essential resource for owners, mechanics, and technicians, designed to save time and assist in informed decision-making for maintenance and repair.