This manual covers the Yanmar 4JH3 series marine diesel engines, including the 4JH3-TE, HTE, and DTE variants. These engines, released around 1998, are known for their robust construction and reliable performance in marine applications. Featuring a 4-cylinder configuration with a displacement of 2.61 liters, they offer indirect cooling systems and are available in turbocharged or naturally aspirated configurations. The 4JH3 series engines are engineered for durability and efficiency, making them a trusted choice for various marine power needs.

The purpose of this Service Manual is to provide comprehensive guidance for the maintenance and overhaul of the Yanmar 4JH3 series engines. It includes essential information on scheduled maintenance, safety procedures, troubleshooting, and detailed service specifications. Technicians and owners will find valuable data on tools and measuring instruments required for repairs. This factory-produced documentation is designed to assist in keeping these marine diesel engines in optimal working condition, ensuring their longevity and peak operational performance.