This comprehensive service and repair manual covers a wide range of Mercury Mariner outboard motors manufactured between 1977 and 1989, encompassing models from 45HP to 220HP. It provides detailed instructions and illustrations to guide you through maintenance, service, diagnosis, and repair procedures. This manual is your essential resource for keeping your outboard motor running smoothly and efficiently. The manual covers a vast array of topics, including: * **Safety:** Learn essential safety protocols for working on your outboard motor. * **Tuning:** Understand the intricacies of tuning your engine for optimal performance. * **Maintenance:** Discover a comprehensive guide to regular maintenance procedures. * **Fuel System:** Gain insights into the fuel delivery system, from fuel lines to fuel filters. * **Ignition System:** Learn about the ignition system, including spark plugs, ignition coils, and distributors. * **Timing & Synchronization:** Master the art of properly timing and synchronizing your engine. * **Electrical System:** Explore the workings of the electrical system, including wiring diagrams and troubleshooting guides. * **Powerhead:** Dive into the powerhead, covering components such as the cylinder block, pistons, and crankshaft. * **Lower Unit:** Gain a thorough understanding of the lower unit, including gear lubrication, propeller shaft, and water pump. * **Trim & Tilt:** Learn how to operate and maintain the trim and tilt system. * **Remote Controls:** Explore the intricacies of remote control systems. * **Hand Rewind Starter:** Understand the workings and maintenance of the hand rewind starter. * **Appendix:** Find useful information, such as component specifications and troubleshooting charts. This manual is the same type of resource that your local dealer or mechanic would use, providing the level of detail and clarity needed to perform effective repairs and maintenance.

The Mercury Mariner outboard motor, produced from 1977 to 1989, was a popular choice for boaters seeking reliable and powerful propulsion for their vessels. These outboards were known for their durability and performance, spanning a wide range of horsepower options from 45HP to a robust 220HP. They were built with a focus on providing smooth, efficient operation, making them suitable for various boating applications, including fishing, recreational cruising, and watersports. The Mariner line was a collaboration between Mercury Marine and Brunswick Corporation, offering a cost-effective alternative to the flagship Mercury brand. While sharing many design elements with their Mercury counterparts, the Mariners were often distinguished by their blue color scheme and the "Mariner" branding. Despite their age, these Mercury Mariner outboards continue to be a popular choice for boat owners seeking a reliable and relatively easy-to-maintain engine. However, with their age, finding accurate and comprehensive repair information can be challenging. This is where the "1977-1989 Mercury Mariner Outboard 45HP-220HP Factory Service Repair Workshop Manual" comes in. This manual provides a detailed and comprehensive guide to troubleshooting, repairing, and maintaining these outboard motors. It includes detailed diagrams, step-by-step instructions, and specifications, making it an invaluable resource for both experienced mechanics and DIY enthusiasts. Whether you are tackling a simple tune-up or a major engine overhaul, this manual has the information you need to get the job done right.