This service manual covers the Mercury factory outboard 115 EFI 4-stroke model, starting from the 2001 model year and above, with serial numbers OT178500 and higher. Designed for reliable performance and efficiency, this engine represents a commitment to quality engineering and robust operation. Its features are tailored for a range of marine applications, providing dependable power and smooth operation for recreational and professional use.

The purpose of this manual is to provide comprehensive guidance for the maintenance, repair, and servicing of your Mercury outboard engine. It details essential procedures, technical specifications, and troubleshooting steps to ensure optimal performance and longevity. Owners, technicians, and mechanics will find the information necessary to perform routine checks, diagnostics, and repairs, thereby maintaining the vehicle's integrity and operational readiness.