This manual covers the Mercury Mariner 8 HP 4-stroke outboard motor. Designed for reliable performance, this water-cooled engine utilizes a carburetor for fuel delivery and a CDI ignition system. Its wet sump lubrication system and manual recoil starter ensure straightforward operation. The outboard gearcase transmission offers Forward, Neutral, and Reverse gear positions, making it a versatile choice for various boating applications. The purpose of this Service Repair Manual is to provide comprehensive guidance for the maintenance and repair of your Mercury Mariner outboard. It details essential procedures, technical specifications, and safety information necessary for proper upkeep. Covered topics include lubrication requirements, fuel system details, ignition system components, and operational aspects such as starting and trim/tilt functions. This manual is an indispensable resource for owners and technicians seeking to ensure the longevity and optimal performance of their Mercury Mariner 8 HP outboard.