This manual covers the Mercury Mariner outboard motor, specifically models produced between 1987 and 1993. These 3-cylinder, 75 HP engines are known for their robust design and reliable performance. This guide provides comprehensive information tailored to this generation of Mercury Mariner outboards, ensuring owners can maintain and understand their power units. The purpose of this factory service repair manual is to offer detailed guidance for the maintenance, diagnosis, and repair of your Mercury Mariner outboard. It includes extensive sections on engine specifications, ignition systems, fuel and oil systems, powerhead, lower unit, and various other components. With step-by-step troubleshooting, advanced diagnostic procedures, and clear explanations of common fixes, this manual is an essential resource for owners and technicians alike.