This comprehensive service and repair manual is specifically designed for Yamaha 70hp 2-stroke outboard motors manufactured between 1984 and 1987. The manual provides detailed instructions, illustrations, and wiring diagrams to guide you through every repair procedure, ensuring a smooth and successful outcome. Covering all aspects of servicing and repair, from routine maintenance to complex troubleshooting, this manual empowers you to tackle any issue with confidence. Every model and engine type within the stated years is included, ensuring you have the information you need at your fingertips. This manual is your ultimate resource for restoring your Yamaha outboard to peak performance. With its clear instructions and comprehensive coverage, you can confidently diagnose and repair any problem, keeping your motor running smoothly for years to come.

The Yamaha 70hp 2-stroke outboard motor, produced between 1984 and 1987, was a reliable and powerful workhorse for recreational boaters and small commercial fishing operations. This model was renowned for its robust construction and durable design, making it a popular choice for a variety of boating activities. The 70hp engine featured a two-cylinder, two-stroke design, which provided exceptional power-to-weight ratio and excellent acceleration. The motor was also equipped with a number of innovative features for its time, including a CDI ignition system for improved starting and performance, a reliable electric start system, and a manual choke for easy cold starts. This combination of power and user-friendliness made the 70hp a favorite among anglers and boaters alike. The Yamaha 70hp 2-stroke outboard motor was designed with serviceability and ease of maintenance in mind. Its components were readily accessible, making routine checks and repairs relatively straightforward for both experienced mechanics and DIY enthusiasts. This ease of maintenance contributed significantly to the motor's longevity and made it a cost-effective option in the long run. However, it's important to note that due to the age of this motor, finding replacement parts might require searching specialized suppliers or online marketplaces. This model marked a significant step forward in the evolution of Yamaha's outboard motor technology, paving the way for the development of even more powerful and efficient engines in the years to come. The 70hp model continues to be a popular choice among classic boat enthusiasts and restoration projects, showcasing its enduring legacy and testament to its quality and reliability.