This manual covers the Yamaha 20CMH outboard motor, manufactured in 2004. This 20-horsepower, 2-stroke marine propulsion unit is engineered for reliable performance in demanding aquatic environments. Its robust construction and thoughtful design ensure dependable operation for a wide range of marine applications. This comprehensive Parts Catalogue provides detailed information for maintaining and identifying components of the Yamaha 20CMH outboard motor. It includes exploded diagrams and part numbers for various systems, such as the top cowling, cylinder, crankshaft, fuel system, starter, electrical components, and drive units. This resource is essential for owners, technicians, and mechanics to accurately identify and procure replacement parts, ensuring the continued optimal function and longevity of the outboard motor.