This manual covers the Mercury Mariner 115 HP EFI outboard motor, manufactured between 2001 and 2006. This 4-stroke EFI outboard engine features a 4-cylinder configuration and delivers 115 horsepower, utilizing Electronic Fuel Injection for efficient operation. Designed for reliable performance on the water, the Mercury Mariner 115 HP EFI is engineered for durability and consistent power output, making it a dependable choice for various marine applications. The purpose of this Service Repair Manual is to provide comprehensive guidance for the maintenance and repair of your Mercury Mariner 115 HP EFI outboard motor. It details essential procedures, technical specifications, and troubleshooting information necessary for owners and technicians. By following the instructions within this manual, users can ensure the optimal performance, longevity, and safety of their marine engine.