This workshop service manual covers the Mercury Mariner outboard motor, produced between 1988 and 1993, belonging to the Early 90s Generation. This water-cooled, 4-cylinder outboard engine delivers 115 horsepower and features a CDI ignition system and a carbureted fuel delivery system. It is equipped with a power trim and tilt system and a standard alternator for its electrical needs. Designed for marine propulsion, the Mariner is built for reliability and performance on the water, offering a robust solution for boaters. This comprehensive English-language manual provides detailed information essential for the maintenance, repair, and operation of your Mercury Mariner. It includes critical procedures for lubrication, component replacement intervals such as the water pump impeller and fuel filter, and gearcase oil changes. Technical specifications, troubleshooting guidance, and safety protocols are also covered to ensure optimal performance and longevity of your outboard motor. This resource is invaluable for owners and technicians alike.