This service manual covers the 2002 Mercury Mariner 40-50-60 (4-stroke) outboard motor, designed for reliable marine propulsion. These 4-stroke, inline 3-cylinder engines offer horsepower options of 40, 50, and 60, utilizing gasoline fuel. Engineered for the demands of boating, the Mariner outboard motor series is built for durability and performance on the water. This comprehensive English-language service manual provides detailed guidance for both do-it-yourself enthusiasts and experienced mechanics. It features step-by-step instructions, hundreds of photos and illustrations, and clear emphasis on notes, cautions, and warnings to ensure proper maintenance and repair. The manual covers all aspects necessary to keep your Mercury Mariner outboard motor operating at peak efficiency, including engine specifications, troubleshooting, and operational procedures for its Forward, Neutral, Reverse drive system.