The Yanmar 6LY3 Series Marine Diesel Engine Service Repair Manual is a comprehensive guide for servicing and repairing these powerful marine engines. It provides detailed information, electrical and hydraulic diagrams, real photo illustrations, and schemes to guide you through every step of the repair process.

This manual covers a wide range of topics, including general engine information, inspection and adjustment procedures, troubleshooting techniques, disassembly and reassembly instructions, inspection and servicing of basic engine parts, fuel injection equipment, intake and exhaust systems, lubrication systems, cooling water systems, turbocharger systems, reduction and reversing gears, remote control systems, electrical systems, service standards, and tightening torque specifications for bolts and nuts.

The manual covers the following Yanmar models: 6LY3-ETP, 6LY3-STP, and 6LY3-UTP. With its detailed information and clear instructions, this manual allows you to confidently diagnose, repair, and maintain your Yanmar 6LY3 Series Marine Diesel Engine.

The Yanmar 6LY3 Series Marine Diesel Engine is a robust and reliable powerplant designed for use in a variety of marine applications. This engine series is renowned for its performance, durability, and fuel efficiency, making it a popular choice for both recreational and commercial boaters. The 6LY3 series encompasses several models, each optimized for specific power needs and boat sizes. They all share common features like a direct-injection system for efficient fuel delivery, a turbocharger for increased power and torque, and a compact design for easy installation. These engines also offer features like a water-cooled exhaust manifold for reduced noise and vibration, and a robust crankshaft for long-term durability.


The Yanmar 6LY3 Service Repair Manual is an essential resource for anyone involved in the maintenance and repair of these engines. This comprehensive manual provides detailed information on every aspect of the engine, including its construction, operation, troubleshooting, and repair procedures. It features clear diagrams, step-by-step instructions, and extensive technical specifications, making it an invaluable tool for mechanics, technicians, and even DIY enthusiasts. The manual covers topics such as engine disassembly and reassembly, component identification, lubrication and cooling systems, fuel injection, electrical systems, and troubleshooting common engine problems. By utilizing this manual, users can ensure their Yanmar 6LY3 engine operates at peak performance, minimizing downtime and maximizing its lifespan.