The YANMAR 4JH3 Series marine diesel engines, including the 4JH3-TE, 4JH3-HTE, and 4JH3-DTE variants, represent robust and reliable power solutions for marine applications. These 4-cylinder, inline, 4-stroke engines feature indirect injection and are available in turbocharged or turbocharged and intercooled configurations. With a displacement of 2.353 liters (2353 cc), they offer power outputs ranging from 50 hp to 64 hp at a maximum rated speed of 3200 rpm. Engineered for demanding marine environments, these water-cooled engines are designed for durability and efficient operation, making them a trusted choice for various vessel types. This Workshop Service Repair Manual provides comprehensive guidance for the YANMAR 4JH3 Series engines. It covers essential areas such as servicing, repair, and preventative maintenance procedures, ensuring optimal performance and longevity of your marine diesel engine. Detailed technical specifications, lubrication requirements, filter types, and recommended maintenance intervals are included to assist owners and technicians. The manual also addresses troubleshooting and diagnostics, offering valuable information to help identify and resolve potential issues, thereby facilitating effective upkeep and repair.