1978 Ski-Doo Shop Manual, Page 269Get this manual

1978 Ski-Doo Shop Manual, Page 269

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SECTION 05 SUB-SECTION 02, (SPARK PLUG)
346 440 345 354 640

W3COW280MZ2 W4C3W260MZ2 M4AM260 Tl W3COW280MZ2 W08CSW340S2S M4A2 M240 Tl

340 6500 Plus 640 450 LC