This comprehensive service and repair manual is your ultimate guide to maintaining and repairing your Mercury Mariner Outboard 65, 75, 80, 90, 100, 115, and 125 JET motors. It contains all the information you need to keep your engine running smoothly, including detailed instructions on troubleshooting, repair procedures, and component replacement. This manual provides detailed coverage of a wide range of topics, including: **Essential Information**: Starting with a foundation of important information, specifications and general details about the engines. **Maintenance and Installation**: Learn how to properly maintain your engine with a dedicated section on routine maintenance and detailed instructions on how to install your outboard motor. **Electrical Systems**: Dive deep into the electrical system with comprehensive information on ignition, charging, starting, and wiring diagrams. **Fuel System**: This section covers everything from the fuel pump to the carburetor, including detailed descriptions of the fuel system and how to troubleshoot any issues. **Powerhead and Mid-Section**: Understand the inner workings of your engine with detailed information on the powerhead, mid-section, and the components that drive your motor. **Trim and Tilt Systems**: Get a thorough understanding of both power trim and manual tilt systems, including instructions on how to repair and maintain these components. **Lower Unit and Jet Drive**: Learn how to repair and maintain the lower unit and jet drive, essential components for the performance and longevity of your engine. **Attachments and Control Linkage**: Find detailed information on attachments, control linkage, throttle/shift linkage, tiller handle, and manual starter, ensuring you can keep all your components functioning correctly. This manual is the same one used by your local Mercury dealer, making it the most reliable source of information for your repairs.

The Mercury Mariner outboard motor series, encompassing models from 65 to 125 horsepower, is a renowned line of jet-powered outboard engines designed for exceptional performance and maneuverability in shallow water conditions. These engines were manufactured by Mercury Marine, a leading manufacturer of marine propulsion systems, and offered a reliable and powerful option for a range of watercraft, including boats, pontoons, and personal watercraft. The Mariner jet drive system utilizes a high-velocity water jet to propel the boat, eliminating the need for a traditional propeller. This design allowed for operation in shallow water, over submerged obstacles, and even in areas with limited water depth, making it ideal for exploring waterways and enjoying watersports in diverse environments. The Mariner jet engines were known for their smooth acceleration, responsive handling, and quiet operation. They featured robust construction, incorporating durable materials and components to withstand the demands of marine environments. The jet drive system provided exceptional maneuverability, allowing for precise control and tight turns. The engines also incorporated advanced features like electronic ignition systems, power trim and tilt, and reliable starting systems. These features contributed to the Mariner jet engines' popularity among recreational boaters, fishing enthusiasts, and even commercial operators seeking reliable and efficient propulsion in challenging water conditions. While production of the Mariner brand has since been discontinued, these engines remain a popular choice for their versatility and performance capabilities, particularly in situations where traditional propeller-based outboards might be limited.