1985 Ski-Doo snowmobile Service Manual, Page 192Get this manual

1985 Ski-Doo snowmobile Service Manual, Page 192

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Section 02 ENGINE Sub-section 09 (537 ENGINE TYPE)
REFILLING THE SYSTEM
Capacity: Approximately 4.2 liters (148 Impoz) (142 U.Soz) 55 antifreeze45 water CAUTION: To prevent rust formation