This manual covers the Yanmar 4LHA Series of marine diesel engines. These inline 4-cylinder engines are designed for reliable performance in marine applications, featuring direct injection and turbocharging for efficient power delivery. The series offers various configurations, including sterndrive and inboard options, indicated by model suffixes such as STE, DTE, HTE, and their associated variants. Yanmar engines are recognized for their robust engineering and durability, making them a trusted choice for a wide range of vessels.

The purpose of this workshop repair and operation manual is to provide comprehensive guidance for the maintenance and repair of your Yanmar 4LHA Series engine. It details essential procedures, technical specifications, and troubleshooting steps necessary for optimal engine performance and longevity. This manual is an indispensable resource for owners, mechanics, and technicians, covering critical areas such as service schedules, fluid capacities, filter replacements, and impeller maintenance. Adhering to the guidelines within this document will help ensure the continued reliability and efficiency of your Yanmar marine engine.