This comprehensive service and repair manual for the Mercury 115 EFI 4-stroke outboard motor, covering models starting from year 2001 and serial number 0T178500, is your essential guide to maintaining and repairing your engine. With detailed instructions and high-quality illustrations, you'll have the confidence to perform a wide range of service tasks, from routine maintenance to complex repairs.

The manual includes vital information on all major engine components, providing in-depth coverage of the electrical system, electronic fuel injection, powerhead, mid-section, lower unit, attachments, control linkage and color diagrams. Each section is meticulously organized and clearly explained, ensuring you have the information you need to diagnose and resolve any issues that may arise.

The Mercury 115 EFI, a four-stroke outboard motor launched in 2001, signifies a significant step forward in the evolution of marine propulsion. This 115 horsepower engine, renowned for its smooth performance and fuel efficiency, became a popular choice for a wide range of boaters. The heart of the 115 EFI lies in its advanced electronic fuel injection (EFI) system. This cutting-edge technology delivers precise fuel metering, ensuring optimal combustion and resulting in impressive power delivery and fuel economy. The EFI system also eliminates carburetor issues like flooding and stalling, making the engine incredibly reliable, even in demanding conditions. The 115 EFI's sturdy construction, featuring a durable cast iron powerhead and a robust lower unit, is built to withstand the harsh marine environment. This reliability makes it suitable for a diverse range of applications, from fishing and cruising to watersports.

The Mercury 115 EFI's versatility is further enhanced by its compact design. This lightweight motor mounts effortlessly on a variety of boats, from small runabouts to larger fishing vessels. The engine's inherent quiet operation adds to the overall enjoyment of boating, allowing for peaceful outings and conversations with fellow passengers. Coupled with its easy-to-use controls and low maintenance requirements, the 115 EFI proves to be an accessible and enjoyable motor for both seasoned boaters and newcomers alike. Its legacy lives on with many owners continuing to enjoy the reliable performance and enduring value of this classic Mercury model. While the availability of new parts may present some challenges due to the engine's age, there remains a passionate community of mechanics and enthusiast who are dedicated to keeping these motors running smoothly.