1981 Ski-Doo Shop Manual Supplement, Page 3Get this manual
MODEL IDENTIFICATION This shop manual covers the following Bombardier made 1981 snowmobilesElanSpirit Citation 3500Mirage Citation 4500EMirage IIIE
The engine also has serial number
Citation SSMirage Special Everest 500500EFutura 500500E Everest LICFutura LlC Blizzard 5500Grand Prix Special Blizzard MXGrand Prix MX Blizzard 7500Super Sonic Blizzard 9500Ultra Sonic Alpine 640 Elite Furthermore, each vehicle has its particular vehicle seri al numberLiquid cooled engines ENGINE SERIAL NUMBER ENGINE SERIAL NUMBER
Fan cooled engines