This manual covers the Yanmar 4LHA-STESTZE, 4LHA-DTEDTZE, and 4LHA-HTEHTZE series of inboard diesel engines. These 4-cylinder, turbocharged and intercooled engines offer a displacement of 1.995 L and are designed for marine applications. The 4LHA-STESTZE model provides 100 MHP, the 4LHA-DTEDTZE delivers 125 MHP, and the 4LHA-HTEHTZE offers 140 MHP, all at 3200 RPM. These engines feature a water-cooled system and direct fuel injection, ensuring efficient and reliable performance. Their robust construction and engineering are built to meet the demanding requirements of marine environments.

This comprehensive service repair manual in English provides essential information for the maintenance and repair of your Yanmar engine. It details critical procedures, technical specifications, and troubleshooting guidance. Key areas covered include recommended maintenance schedules, fluid capacities, and specifications for engine oil and coolant. By following the instructions within this manual, owners, mechanics, and technicians can ensure the optimal performance, longevity, and reliability of their Yanmar 4LHA series engines.