1989 Ski-Doo Repair Manual, Page 380Get this manual
Section 04
ELECTRICAL SYSTEM
(SPARK PLUGS)
Sub-section 03
SPARK PLUG INSTALLATION
Prior to installation make sure that contact surfaces of the cylinder head and spark plug are free of grime1Using wire feeler gauge, set electrode gap according to chart on next page2Apply loctite antiseiz8 lubricant (P IN 413 7010 00) over tho spark plug threads to prevent possible seizure3Hand screw spark plug into cylinder head and tighten with torque wrenchUse proper wrench to tighten the spark plugProper wrench Improper wrench