2005 Ski-Doo Tundra, Skandic, Expedition Shop Manual, Page 447Get this manual
Section 08 ELECTRICAL Subsection 02 (SPARK PLUGS)
SPARK PLUG INSTALLATION
Prior to installation make sure that contact surfaces of the cylinder head and spark plug are free of grime1) Using wire feeler gauge, set electrode gap according to TECHNICAL DATA2) Apply anti-seize lubricant (PN 293 800 070) over the spark plug threads to prevent possible seizure3) Hand screw spark plug into cylinder head and tighten with torque wrench and proper socket