This manual covers the Yanmar 2S Marine Diesel Engine, a robust and reliable unit designed for demanding marine applications. Engineered for exceptional performance and durability, the Yanmar 2S is built to provide consistent power and efficiency, making it a trusted choice for various maritime needs. Its advanced diesel technology ensures optimal operation and longevity, reflecting Yanmar's commitment to quality and innovation in marine propulsion. This comprehensive Service Repair Workshop Manual provides essential information for the service, repair, and maintenance of your Yanmar 2S Marine Diesel Engine. It details maintenance standards for main parts, periodic checking and servicing procedures, and countermeasures for engine troubles. The manual also includes instructions for engine disassembly, reassembly, and the servicing of other components, along with information on fuel, lubricating oil, and structural outlines. This resource is designed to assist owners, mechanics, and technicians in keeping the engine in optimal working condition.