This Service Repair Workshop Manual covers the YANMAR 6LYA-UTE and 6LYA-STE marine diesel engines. These inline 6-cylinder engines feature a 6.493 L displacement, direct injection, turbocharging, and intercooling, delivering robust power outputs suitable for demanding marine applications. The 6LYA-UTE model provides up to 355 mhp at 2300 rpm, while the 6LYA-STE offers 315 mhp at 2200 rpm. Engineered for reliability and performance, these engines are designed for direct or indirect seawater cooling systems and are compatible with various marine gearboxes.

This comprehensive manual provides essential information for the maintenance, repair, and troubleshooting of your YANMAR marine diesel engine. It details critical procedures, technical specifications, and recommended service intervals, including oil and coolant types, and filter replacement guidelines. Whether you are an owner seeking to perform routine maintenance or a technician undertaking complex repairs, this guide offers the necessary knowledge to ensure your engine operates at peak efficiency and longevity.