This workshop service manual covers the Mercury Mariner outboard engine, a 4-stroke model delivering 50 horsepower. Engineered for reliability and performance, this engine is designed for a variety of marine applications. Its robust construction and efficient water-cooling system ensure dependable operation in demanding conditions. This manual provides comprehensive guidance for technicians with general automobile practices knowledge. It details essential maintenance procedures, troubleshooting techniques, and technical specifications necessary for the upkeep and repair of the Mercury Mariner. The content is organized to assist in maintaining the optimal performance and longevity of your marine propulsion system.