This manual covers the Mercury Mariner Outboard 9.9 HP, a reliable and efficient 2-stroke engine designed for a variety of small watercraft. Known for its robust construction and straightforward operation, this outboard motor provides dependable performance for recreational boating and utility applications. Its engineering prioritizes ease of use and longevity, making it a popular choice for boaters seeking a no-nonsense power solution. This Service Repair Manual in English provides comprehensive guidance for the maintenance and repair of your Mercury Mariner Outboard. It details essential procedures, including routine maintenance schedules, lubrication requirements, and specifications for critical components like the fuel system and gearcase. Technicians and owners will find detailed information on troubleshooting, technical data, and safety precautions necessary to keep the engine operating at peak performance and ensure its extended service life.