This workshop service repair manual covers Mercury Mariner outboard engines, designed for a wide range of marine applications. These engines are known for their robust construction and reliable performance, offering various horsepower options including 75 HP, 90 HP, 100 HP, 115 HP, and 125 HP models. The manual encompasses engines with both fuel-injected and carbureted fuel systems, water-cooled engines, and features like power trim and tilt, catering to a broad spectrum of Mariner outboard configurations. This comprehensive English-language manual provides detailed information essential for the maintenance and repair of your Mercury Mariner outboard. It includes in-depth procedures for servicing, troubleshooting common issues, and understanding the technical specifications of your engine. Owners, technicians, and mechanics will find guidance on engine oil capacity, recommended fuel types, ignition systems, charging systems, and steering configurations. With hundreds of pages of expert advice, this manual is an indispensable resource for ensuring the longevity and optimal performance of your marine propulsion system.