1970-1973 Ski-Doo Snowmobiles Technical Data Manual, Page 36Get this manual

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1971 MODELS Engine Type 300 Direct Timing (Advanced) inches B.T.D.C.150" .160" .140" .160" .140" .160" .140" .170" .150" .170" .180" .160" .180" .160" .180" .160" .190" .170" Indirect Timing (Advanced

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