1982 Ski-Doo Shop Manual, Page 274Get this manual
SECTION 04 ELECTRICAL SUB-SECTION 03 (SPARK PLUGS)
SPARK PLUG CHART
Models Engine type Spark plugs
ElanSpirit
Bosch 175 (M A)
Citation 3500Mirage Citation 45001Mirage IICitation SSMirage Special Nordik, SkandicFutura 300 Blizzard 5500 MXSonic Blizzard 9500Ultra Sonic