1997 Ski-Doo Factory Shop Manual Volume One, Page 213Get this manual
Section 05 ELECTRICAL Sub-Section 07 (TESTING PROCEDURE)
NIPPONDENSO CDI SYSTEM TESTING
(Applicable to 277 Engine Type)
NOTEEnsure ignition cut-out switches are properly working and they are in the ON position prior to performing the following testsWARNINGTo prevent powerful electric shocks while cranking engine, do not touch neither electronic ignition components (ignition coil, high tension wire, wire harness, etc nor tester leads'
IGNITION COIL OUTPUT
A paper clip of approximately 20 mm (34 in) will be used as test adapter for the following test1Clip the test adapter around spark plug cable close to the spark plug2Connect tester wires then set switch and dial as follows :
Tester wires Component wires Tester adapter (paper clip) on spark plug cable Engine ground Tester switch position Tester dial position