This Service Repair Manual covers the 1994 Mercury Mariner 115 HP outboard motor, identified by serial number 0D283222 and above. This powerful 4-cylinder, inline, water-cooled engine boasts a displacement of 109.5 cubic inches (1800 cc) and features a CD ignition system and a likely 3-barrel carbureted fuel system. Engineered for reliable performance on the water, the Mercury Mariner 115 HP is designed for a variety of marine applications, offering robust power and dependable operation. This comprehensive manual provides essential information for maintaining and repairing your Mercury Mariner 115 HP outboard motor. It details critical procedures, technical specifications, and troubleshooting guidance, enabling owners and technicians to ensure optimal performance and longevity. Coverage includes engine details, lubrication requirements, service intervals for key components, and electrical system information, all presented in English to assist with all aspects of service and upkeep.