This manual provides comprehensive information for the 1979 Ski-Doo Alpine 640 ER, Blizzard 5500, Blizzard 7500+, Blizzard 9500+, and Citation snowmobiles. These models represent Ski-Doo's commitment to robust engineering and reliable performance in challenging winter conditions. Designed for versatility and durability, these snowmobiles are built to handle a variety of terrains and recreational activities, offering riders a dependable and enjoyable experience. Their construction emphasizes quality components and thoughtful design, ensuring consistent operation and longevity.

The purpose of this manual is to serve as an essential resource for owners, technicians, and mechanics. It details critical maintenance procedures, diagnostic troubleshooting steps, and essential technical specifications required to keep these snowmobiles in optimal working order. By following the guidelines and instructions within this document, users can effectively perform routine servicing, address potential issues, and ensure the safe and efficient operation of their 1979 Ski-Doo snowmobiles, maximizing their performance and lifespan.