1986 Ski-Doo Factory Shop Manual, Page 374Get this manual
Section 04 ELECTRICAL SYSTEM Sub-section 03 (SPARK PLUGS)
Hand screw spark plug into cylinder head and tighten with torque wrench: Bosch "M" plug (18 mm) 37 N-m {27 Ibf-ftJ NGK "8" plug (14 mm) 27 N-m 120 Ibf-ftj Nippondenso "W" plug (14 mm) 27 N-m (20 Ibf-ft)Proper wrench
Improper wrench
A0000001 1
Use proper wrench 10 tighten the spark plug
SPARK PLUG CHART
Engine Spark plugs type