This comprehensive YANMAR JH3, 3JH3, and 4JH3 marine diesel workshop manual provides detailed repair and service information for a wide range of models, including the 3JH3/4JH3E (40-125 HP), 4JH3-T(B)E (75 HP), 4JH3-HTBE (100 HP), 4JH3(B)(C)E(A), 3JH3(B)(C)E(A), and 4JH3CE1. The manual covers all aspects of these engines, from basic engine parts to complex systems like fuel injection, intake and exhaust, lubrication, cooling water, reduction and reversing gear (KBW 20 and 21, KM4A Angle drive), remote control, and electrical systems. It also includes step-by-step instructions for disassembly and reassembly procedures, making it an invaluable resource for technicians and boat owners alike.

The YANMAR JH3 series of marine diesel engines are renowned for their reliability, durability, and efficiency. These engines are designed to power a wide range of marine applications, including fishing boats, pleasure crafts, and commercial vessels. The JH3 series encompasses models like the 3JH3, 4JH3E, 4JH3-T(B)E, 4JH3-HTBE, and 4JH3(B)(C)E(A), all of which share common design principles and offer distinct performance characteristics. These engines are known for their compact design, low noise levels, and smooth operation, making them ideal for both freshwater and saltwater applications. They feature a robust construction, high-quality components, and meticulous engineering to ensure long-lasting performance. The 4JH3CE1, a specific variant within the JH3 series, is a popular choice for marine applications requiring a high level of power and efficiency. This engine is a four-cylinder, direct injection diesel engine designed for demanding marine environments. It boasts a compact design, low fuel consumption, and exceptional performance, making it ideal for powering medium-sized vessels. The 4JH3CE1 is also equipped with advanced features such as a turbocharger for enhanced power output and a sophisticated electronic control system for optimized performance and fuel economy. The 4JH3CE1 has earned a reputation for its smooth operation, low vibration levels, and ease of maintenance, making it a reliable and efficient choice for marine enthusiasts and professionals alike.