1978 Ski-Doo Shop Manual, Page 302Get this manual
SECTION 05 SUB-SECTION 03, (MERC-O-TRONIC TEST) (
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 no4 CONDENSER CAPACITY3Temporarily attach the red and black test leads together4Depress red button and turn meter set scale 4-6 knob until needle aligns with set mark on right sideUnclip test leads5Proceed with test no6