This workshop service repair manual covers the Mercury Mariner 9.9 outboard motor. This 4-stroke engine delivers 9.9 horsepower and features water-cooling and a CDI ignition system. Designed for marine applications, the Mariner 9.9 is engineered for reliable performance on the water. Its carbureted fuel system and forward, neutral, and reverse gear selection provide essential functionality for various boating needs. This comprehensive manual provides detailed information for the maintenance and repair of your Mercury Mariner 9.9 outboard motor. It includes essential procedures, technical specifications, and troubleshooting guidance for mechanical technicians and owners alike. By following the instructions within this English-language manual, you can ensure the optimal performance, longevity, and safety of your marine engine.