2004 Skidoo Tundra Skandic Series Service Manual, Page 309Get this manual
Section 06 ELECTRICAL Subsection 03 (SPARK PLUGS)
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 TECHNICAL DATA2Apply anti-seize lubricant (PN 293 800 070) over the spark plug threads to prevent possible seizure3Hand screw spark plug into cylinder head and tighten with torque wrench and proper socket