1980 Ski-Doo Shop Manual, Page 23Get this manual
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SECTION 02 SUB-SECTION (04-06)
M175 T1 (M7A) W275 T2 (W3C) W275 T2 (W3C) W275 T2 (W3C)
503 464 503 354 454 640 444
W275 T2 (W3C) W275 T2 (W3C) W275 T2 (W3C) W300