This manual covers a range of Ski-Doo snowmobile models produced between 1970 and 1979, including the Olympique, TNT, R/V, Citation, Everest, Blizzard, and Elan. These models represent a significant period of innovation in snowmobile technology, with engine displacements ranging from 245cc to 503cc. Ski-Doo, a pioneer in the industry, is recognized for its performance and design. The snowmobiles from this era are known for their robust engineering, contributing to their enduring appeal for enthusiasts and those undertaking restoration projects. This comprehensive factory service and repair manual provides detailed information essential for maintaining and repairing your Ski-Doo snowmobile. It covers general information, periodic maintenance, tune-ups, troubleshooting, and specific procedures for engine, fuel system, powertrain, suspension, steering, and electrical systems. With step-by-step instructions, illustrations, and diagrams, this manual is designed for DIY enthusiasts and professional mechanics alike, offering A-Z coverage to ensure optimal performance and longevity of your vehicle.