1974 Ski-Doo Shop Manual, Page 179Get this manual
ADJUSTMENT OF SCALE NO.4 FOR TEST NO.6 1Plug the analyser cord into 115 volts, 60 cycle, AC outlet2Place analyser selector switch to position No.4 CONDENSER CAPACITY3Temporarily attach the red and black test leads together4Depress red button and turn meter adjustment of scale No to set pointer "0"Unclip test leads5Proceed with test No 6