This document pertains to the Mercury Mariner Marathon 15 HP outboard engine. Engineered for reliability and performance, this water-cooled engine delivers 15 horsepower, making it suitable for a variety of marine applications. Its robust construction and dependable operation are hallmarks of Mercury Mariner's commitment to quality in marine propulsion. This comprehensive Factory Service Repair Manual, presented in English and spanning hundreds of pages, provides essential information for the maintenance and repair of your Mercury Mariner Marathon 15 HP outboard. It covers critical areas including detailed maintenance procedures, troubleshooting guides, technical specifications, and safety directives. This manual is an indispensable resource for owners and technicians seeking to ensure optimal performance and longevity of the engine.