This comprehensive repair manual provides detailed instructions for maintaining and repairing your 1986 Ski-Doo snowmobile. It covers a wide range of models, including the Alpine 503, Citation LS, Citation LS/E, Elan 250, Formula MX, Formula MX LT, Formula MX SS LT Plus, Formula Plus, Formula SP, Safari 377, Safari 447, Skandic 377, Skandic 377R, Tundra, and Tundra LT. The manual includes step-by-step instructions for routine maintenance tasks, such as engine tune-ups, lubrication, and cooling system checks. It also covers more advanced repairs, including engine rebuilding, transmission and drive system maintenance, steering system adjustments, and electrical system troubleshooting. The manual provides detailed diagrams, illustrations, and clear explanations to ensure you have the information you need to complete any repair successfully.

The 1986 Ski-Doo snowmobile lineup offered a wide variety of models to suit different needs and preferences. From the entry-level Alpine 503 to the powerful Formula MX and Tundra LT, there was a Ski-Doo for every rider. The Citation LS, LS/E, and Elan 250 were popular choices for recreational riders, known for their comfortable ride and reliable performance. The Safari series with its 377 and 447 engines catered to those seeking versatility and practicality, ideal for both trail riding and utility tasks. The Skandic 377 and 377R were designed for off-trail adventures and deep snow conditions, thanks to their rugged construction and powerful engine. The 1986 Ski-Doo models were known for their advanced features and innovative technology. They incorporated a range of improvements such as the innovative 'Direct Air Induction' system, which provided optimal air intake for improved engine performance. The 'Mono-Shock' rear suspension, first introduced in 1985, offered a smoother and more controlled ride. Many models included electric start for convenience, and several featured a 'Reverse Gear' for easier maneuvering. The Ski-Doo brand was renowned for its commitment to durability and reliability, making these machines popular choices among snowmobile enthusiasts. A comprehensive repair manual, offering detailed information on all aspects of maintenance and repair, proved invaluable for owners seeking to keep their Ski-Doos in top condition.