This manual covers the Yanmar 6LYA-UTE and 6LYA-STE marine diesel engines. These engines are engineered for robust performance and reliability in demanding marine applications. Their design emphasizes durability and efficiency, making them a trusted choice for various vessel types. This comprehensive Service Repair Workshop Manual provides detailed information essential for maintaining and repairing your Yanmar engines. It includes extensive coverage of engine and transmission service, brake systems, electrical systems, cooling, fuel systems, and more. With step-by-step procedures, troubleshooting guides, and technical specifications, this manual is an indispensable resource for owners and technicians alike.