The Mercury Mariner 75 HP Seapro, produced between 1987 and 1993, represents an early generation of Seapro outboard engines. This 2-stroke, 3-cylinder engine delivers 75 horsepower, featuring a carbureted fuel system and a CDI ignition. Engineered for reliability and performance, it is suitable for a wide range of marine applications, typically recommended for boats measuring 16 to 20 feet, depending on hull design and load. Its robust construction and proven design make it a dependable choice for various boating activities. This Workshop Service Manual provides comprehensive repair and overhaul information for the Mercury Mariner 75 HP Seapro. It covers essential maintenance procedures, including lubrication, cooling system care, and spark plug recommendations, alongside detailed technical specifications for engine and transmission components. Troubleshooting guidance and safety information are also included to assist owners, mechanics, and technicians in maintaining the optimal performance and longevity of their vessel's propulsion system.