This workshop service repair manual covers the Mercury Mariner 25 BigFoot outboard engine manufactured between 1998 and 2008. This 4-stroke, water-cooled engine delivers 25 horsepower and features a CDI ignition system and gasoline fuel system. Its outboard gearcase is equipped with Forward, Neutral, and Reverse gears, designed for reliable performance in various marine applications. The BigFoot designation indicates specific enhancements for this model. This comprehensive manual provides essential information for the service, maintenance, and troubleshooting of your Mercury Mariner 25 BigFoot. It details critical procedures, technical specifications, and safety guidelines necessary for proper upkeep and repair. Owners, mechanics, and technicians will find this English-language resource invaluable for ensuring the longevity and optimal performance of their engine.