This manual covers the Yamaha 15 MSHC outboard motor, manufactured in 2004. Designed for reliable boat propulsion, this 2-stroke gasoline engine delivers 15 horsepower. Its robust engineering ensures dependable performance on the water, making it a trusted choice for various marine applications. The motor features a CDI ignition system, carburetor fuel delivery, and water cooling for efficient operation. This Factory Service Manual provides comprehensive guidance for maintaining and repairing your Yamaha 15 MSHC outboard motor. It includes detailed step-by-step procedures, exploded diagrams, and instructions for disassembly, repair, assembly, and inspection. The manual covers essential maintenance, such as recommended oil types, and technical specifications to help owners and technicians ensure the longevity and optimal performance of the motor.