This workshop service repair manual covers the Mercury Mariner outboard engine. This water-cooled, 4-stroke engine features a 323cc displacement and offers power options of 9.9 HP or 15 HP. It is equipped with a carbureted fuel delivery system and a CDI ignition system, with starting options that may include manual or electric start depending on the specific model. The transmission is an outboard type with a Forward-Neutral-Reverse gear selection. This comprehensive manual provides detailed information essential for the maintenance and repair of your Mercury Mariner outboard. It includes in-depth procedures for routine service, lubrication specifications, and troubleshooting guidance. Owners, mechanics, and technicians will find the technical specifications and operational details invaluable for ensuring the optimal performance and longevity of the engine.