1986 Ski-Doo Factory Shop Manual, Page 155Get this manual

Section 02 ENGINE SUb-section 07 (503 ENGINE TYPE)
When installing plain seals (seal without locating ring or without spacing legs), ensure to maintain the specified gap as lIlustrated

4,5, Crankcases bolts
Torque bolts to 21 N.m (15 Ibf.ft) following illustrated sequence7

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• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives