This manual covers the Yanmar 4JH2E, 4JH2-TE, 4JH2-HTE, 4JH2-DTE, and 4JH2-UTE series marine diesel engines. These engines are engineered for reliable performance in demanding marine environments, offering a balance of power, efficiency, and durability. Their robust construction and advanced design ensure consistent operation for a wide range of vessel applications.

The purpose of this comprehensive service repair manual is to provide detailed guidance for the maintenance, troubleshooting, and repair of these Yanmar marine diesel engines. It includes essential technical specifications, step-by-step procedures, and safety precautions to assist owners, technicians, and mechanics in keeping the engines in optimal working condition. Adhering to the information within this manual will help ensure the longevity and performance of your Yanmar engine.