The Mercury Mariner Outboard is a powerful and reliable marine engine, delivering 115 horsepower through its 4-cylinder, 2.1L Electronic Fuel Injection (EFI) system. Engineered for demanding aquatic environments, this water-cooled outboard features a CDI ignition system with electronic advance and a robust outboard gearcase transmission. Its design emphasizes performance and efficiency, making it suitable for a wide range of boating applications. The engine's specifications, including its approximately 350-375 lbs weight and 20 Amp alternator output, highlight its robust construction and capability. This comprehensive Full Service Repair Manual provides essential information for maintaining and repairing your Mercury Mariner Outboard. It covers critical maintenance procedures, such as annual or 100-hour oil changes and specific gear lube capacity, along with details on recommended spark plugs and propeller sizing. Technical specifications, including fuel system and ignition details, are thoroughly explained. This manual serves as an indispensable resource for owners, mechanics, and technicians, ensuring the longevity and optimal performance of the Mariner Outboard through detailed guidance and expert knowledge.