The Mercury Mariner 115 HP EFI 4 Stroke, produced between 2001 and 2006, represents a robust and reliable option for marine propulsion. Engineered with Electronic Fuel Injection (EFI) for efficient performance and a 4-stroke design for smooth operation, this outboard motor is built to deliver consistent power. Its design emphasizes durability and dependable operation, making it a strong choice for a variety of boating applications where performance and longevity are paramount. This Factory Service Repair Manual provides comprehensive guidance for maintaining and repairing your Mercury Mariner 115 HP EFI 4 Stroke. It covers essential maintenance procedures, including tune-ups, lubrication, and power trim service, alongside advanced troubleshooting and diagnostic capabilities. Detailed sections on engine rebuilds, cylinder head service, lower unit repair, and emissions control, along with included wiring diagrams, equip owners and technicians with the necessary information to ensure optimal performance and longevity of the outboard motor.