This comprehensive repair manual provides detailed instructions and technical specifications for Yamaha 50, 60, 70, 80, and 90 horsepower 2-stroke outboard motors manufactured between 1994 and 1998. It covers a wide range of topics, including: * **General information and specifications:** This section provides an overview of your outboard motor's design, features, and essential operating principles. * **Routine maintenance procedures:** Learn how to perform regular maintenance tasks such as oil changes, filter replacements, and spark plug checks to keep your engine running smoothly. * **Engine removal and installation:** Detailed instructions guide you through the safe and efficient removal and reinstallation of your engine, ensuring proper alignment and connections. * **Fuel system:** Explore the intricacies of your outboard motor's fuel system, including troubleshooting common problems with fuel lines, filters, and carburetors. * **Lubrication and cooling system:** Understand the vital role of lubrication and cooling in maintaining engine performance, and learn how to diagnose and resolve issues in these critical systems. * **Transmission, drive chain, and sprockets:** This section provides in-depth explanations and repair guidance for the transmission, drive chain, and sprockets, key components responsible for power transfer. * **Steering system:** Learn about the steering mechanism and its components, including troubleshooting and repair procedures for common steering issues. * **Shocks and bodywork:** Detailed information on the shock absorbers and bodywork helps you understand their functions and address any related problems. * **Intake and exhaust systems:** Explore the intake and exhaust system design, components, and troubleshooting tips for optimal engine performance. * **Electrical system:** Discover the inner workings of your outboard motor's electrical system, including troubleshooting wiring diagrams, component identification, and repair procedures. * **Advanced troubleshooting:** This section provides comprehensive guidance on diagnosing and resolving complex engine problems, helping you identify the root cause and implement effective repairs. This repair manual serves as a valuable resource for both experienced mechanics and DIY enthusiasts, empowering you to confidently maintain and repair your Yamaha outboard motor.

The 1994-1998 Yamaha 50, 60, 70, 80, and 90HP 2-stroke outboard motors were popular choices for recreational boaters seeking reliable and powerful engines. These outboards, part of Yamaha's "C" series, were known for their smooth and quiet operation, making them ideal for fishing, waterskiing, and cruising. They featured a range of advanced features for their time, including a CDI ignition system for improved starting and performance, a robust powerhead design for durability, and a reliable electric starting system. The 50HP model was specifically designed for smaller boats, offering a balance of power and fuel efficiency. The 60, 70, 80, and 90HP models provided increasing levels of power for larger boats and heavier loads, allowing for thrilling acceleration and a smooth ride. These Yamaha outboards were widely praised for their performance and reliability, earning a reputation for longevity and ease of maintenance. Their 2-stroke design ensured a lightweight and compact engine, making them easy to maneuver and install on various boats. However, the 2-stroke nature also meant increased fuel consumption and emissions compared to newer 4-stroke engines. While these motors were popular in their time, they are now considered vintage and require specialized parts and knowledge for maintenance and repair. Despite their age, these Yamaha C-series outboards still hold a special place in the hearts of boating enthusiasts who appreciate their classic design and powerful performance. They represent a significant chapter in Yamaha's history and continue to be enjoyed by boaters who value reliability and a nostalgic boating experience.