1979 Ski-Doo Supplementary Shop Manual, Page 134Get this manual

1979 Ski-Doo Supplementary Shop Manual, Page 134

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SECTION 05 SUB-SECTION 02 (SPARK PLUGS )
List of Bosch" spark plugs used on Bombardier snowmobiles: NEW NUMBER M4 Al M4A2 M5A M7A W08CS W3AO W3CO W4A2 W4A5 W4A6 W4C3 OLD NUMBER M260 Tl M240 Tl M