This manual covers the Mercury Mariner 10 HP 2-Stroke outboard motor, manufactured between 1986 and 2003. Engineered for reliable performance, this water-cooled, gasoline-powered motor features a single carburetor and CDI ignition, making it a dependable choice for various boating applications. Its robust construction and straightforward design contribute to its reputation for durability and ease of use in its power class. This comprehensive service manual provides essential information for the maintenance, repair, and troubleshooting of your Mercury Mariner 10 HP 2-Stroke outboard. It details critical procedures, including lubrication requirements, fuel-oil mix ratios, and recommended service intervals for components such as spark plugs and gearcase oil. With clear instructions and technical specifications, this manual serves as an indispensable resource for owners and technicians alike to ensure optimal performance and longevity of the motor.