The Mercury Mariner 75 HP Seapro, a first-generation model produced between 1987 and 1993, represents a robust and reliable outboard engine designed for demanding marine applications. This 2-stroke, 3-cylinder engine, with a displacement of 96.6 cubic inches (1584 cc), features a carbureted fuel induction system and CD ignition for efficient power delivery. Its engineering emphasizes durability and consistent performance, making it a trusted choice for various watercraft. The 75 HP rated horsepower, operating within a 4500-5500 RPM range, ensures ample power for propulsion and auxiliary tasks. This Service Repair Workshop Manual provides comprehensive guidance for the maintenance, repair, and technical understanding of the Mercury Mariner 75 HP Seapro. It covers essential areas including detailed engine specifications, lubrication requirements, recommended fuel mixtures, and spark plug gap settings. Furthermore, the manual includes information on gearcase types and ratios, as well as serial number identification ranges for different manufacturing locations. By offering in-depth procedures and technical data, this manual serves as an indispensable resource for owners, technicians, and mechanics seeking to ensure the optimal performance and longevity of their Mercury Mariner outboard engine.