This manual covers the Mercury Mariner 115 HP outboard engine, a robust and reliable power unit designed for a variety of marine applications. Engineered for performance and durability, the Mariner series is known for its consistent operation and efficient fuel delivery. This specific 115 HP model offers ample power for recreational boating, fishing, and other water activities, providing a dependable experience on the water. Its water-cooled system and gasoline fuel type are standard for this class of outboard, ensuring efficient operation and ease of maintenance. The purpose of this Factory Service Repair Manual is to provide comprehensive guidance for the maintenance, repair, and troubleshooting of your Mercury Mariner 115 HP outboard. It details essential procedures, technical specifications, and safety precautions necessary to keep your engine in optimal condition. Whether you are performing routine maintenance, diagnosing an issue, or undertaking a more complex repair, this manual serves as an indispensable resource for owners, technicians, and mechanics. Its extensive coverage ensures that you have the information needed to maintain the performance and longevity of your Mercury Mariner engine.