2002 Ski-Doo Shop Manual Volume One, Page 293Get this manual
Section 06 ELECTRICAL Subsection 06 (TESTING PROCEDURE)
Testing Conditions
Voltage measurements are always taken upon starting the vehicleReadings taken when the engine is running will be higher than indicated rangePart temperature must be approximately 20C (68F) (room temperature), otherwise readings could be distorted
1SPARKING
During this operation, it is important to use the snowmobile spark plug and not new oneBring the plug in contact with the engineIf no spark is produced, replace the spark plug with new one and do the test again