The Mercury Mariner 9.9/15 HP outboard motor is a versatile and reliable marine propulsion system designed for a range of boating applications. Featuring a 4-stroke, 2-cylinder engine with a displacement of 323 cc, this motor delivers consistent performance, available in 9.9 HP and 15 HP variants. Its water-cooled system and carbureted fuel induction ensure efficient operation, while the outboard gearcase with Forward-Neutral-Reverse provides precise control. Built with engineering quality in mind, the Mercury Mariner is engineered for durability and dependable service on the water. This Service Repair Manual provides comprehensive guidance for the maintenance and repair of your Mercury Mariner 9.9/15 HP outboard motor. It covers essential areas including scheduled maintenance intervals, lubrication requirements, ignition system details, and fuel system specifications. You will find detailed procedures for upkeep, troubleshooting common issues, and technical data necessary for optimal performance. This manual is an indispensable resource for owners, mechanics, and technicians seeking to ensure the longevity and proper functioning of their Mercury Mariner outboard motor.