This manual covers the Mercury Mariner 45/50/55/60 HP Jet Outboard models. These gasoline-powered outboard motors, delivering between 45 and 60 horsepower, are engineered for reliable performance in various marine applications. Their robust construction and advanced features, including jet drive systems, ensure efficient operation and durability. The manual encompasses a wide range of models and designs, providing comprehensive information for owners and technicians. The purpose of this Factory Service Repair Manual is to provide detailed guidance for the maintenance, repair, and troubleshooting of your Mercury Mariner outboard motor. It includes step-by-step repair procedures, detailed substeps, and hundreds of illustrations and diagrams to facilitate understanding. Key areas covered include the ignition system, fuel system, carburetion, oil injection, powerhead, lower unit, electrical diagnostics, wiring diagrams, cooling system, steering system, throttle and shift controls, tiller handle, and power trim/manual tilt systems. This manual is an essential resource for ensuring the optimal performance and longevity of your outboard motor.