This comprehensive service manual provides detailed instructions and guidance for repairing and servicing Mercury Mariner 2-stroke outboard motors ranging from 2 to 40 horsepower, encompassing models manufactured from 1968 to 1989. Whether you're a seasoned mechanic or a DIY enthusiast, this manual empowers you with the knowledge and tools to maintain your motor in optimal working condition. It meticulously guides you through each repair procedure, from complete disassembly to reassembly, ensuring a thorough understanding of every step. The manual is enriched with hundreds of high-quality illustrations and photographs, making it easy to follow each procedure with clarity and precision.

Detailed substeps expand upon repair procedure information, ensuring a comprehensive understanding of even the most intricate operations. Throughout the manual, notes, cautions, and warnings are strategically placed to highlight critical information and ensure safe and effective repair practices. Numbered instructions guide you through each repair procedure step-by-step, providing a clear and organized approach. Bold figure numbers facilitate easy cross-referencing between instructions and illustrations, enabling swift navigation. Every procedure is accompanied by detailed illustrations, drawings, and photographs, offering a visual guide to enhance comprehension. Enlarged insets within illustrations provide magnified views of specific parts, enabling precise identification and examination.

A numbered table of contents enhances navigation, allowing you to quickly locate the information you need. This manual also simplifies the process of diagnosing and repairing electrical system issues. Troubleshooting and electrical service procedures are combined with detailed wiring diagrams, ensuring a straightforward and efficient approach to electrical system repair. The manual covers a wide range of essential topics, including tools and techniques, troubleshooting, lubrication and maintenance, tuning and adjustments, fuel, ignition and electrical systems, powerhead, gearcase, tilt and trim, wiring, oil injection, rewind starters, engine synchronization and linkage, and more.

The Mercury Mariner 2-40 HP 2-stroke outboard motor, produced from 1965 to 1989, represents a significant chapter in the history of recreational boating. Designed and manufactured by Mercury Marine, the Mariner line was specifically targeted towards budget-conscious boaters seeking reliable and durable power for their smaller vessels. These engines were known for their simplicity and ease of maintenance, making them popular choices for fishing and recreational use, particularly in freshwater lakes and rivers.

The Mariner 2-40 HP range encompassed a variety of models, each offering a specific power output within the 2 to 40 horsepower range. These engines typically featured a single cylinder, two-stroke design with a displacement ranging from 4.8 to 34 cubic inches, depending on the specific model. Powered by a mixture of gasoline and oil, these motors delivered robust power and torque, particularly in the lower RPM range, making them ideal for propelling smaller boats like dinghies, rowboats, and pontoons. They were also known for their fuel efficiency and durability, capable of withstanding the rigors of frequent use and the occasional minor mishap. While the Mariner line was discontinued in the late 1980s, these engines remain popular among vintage boat enthusiasts and hobbyists seeking reliable and affordable power for their classic watercraft.