The Mercury Mariner Outboard Magnum III, produced between 1992 and 2000, represents a robust and reliable choice for marine propulsion. This V6, 2-stroke engine, available in 150, 175, and 200 horsepower variants, features a 153.4 cubic inch (2.5 liter) displacement and a naturally aspirated induction system. Its water-cooled design, CDI ignition, and electric start system contribute to its dependable performance. The Magnum III generation is engineered for durability and efficiency, making it suitable for a wide range of boating applications where consistent power and longevity are paramount. This Service Repair Workshop Manual provides comprehensive guidance for the Mercury Mariner Outboard Magnum III models from 1992-2000. It covers essential maintenance procedures, including lubrication and fuel specifications, as well as detailed troubleshooting steps and technical data. Owners, mechanics, and technicians will find the information necessary to perform routine upkeep, diagnose issues, and ensure the optimal performance and longevity of their outboard engines. The manual details aspects such as gearcase oil requirements, recommended fuel mixtures, and power trim and tilt system operation.