This manual covers the Mercury Mariner 9.9 HP outboard engine. Designed for reliable performance, this carbureted, water-cooled, 2-stroke engine features a CDI ignition system and delivers 9.9 horsepower. Its robust construction and straightforward design ensure dependable operation for various marine applications. This comprehensive Factory Service Repair Manual, written in English, provides detailed guidance for the maintenance and repair of your Mercury Mariner 9.9 HP outboard. It includes essential information on lubrication, servicing, technical specifications, and troubleshooting, empowering owners and technicians to keep the engine in optimal condition. The manual's extensive content, spanning hundreds of pages, is designed to facilitate efficient and accurate service.