1978 Ski-Doo Shop Manual, Page 285Get this manual

SECTION 05 SUB-SECTION 03, (MERC-O-TRONIC TEST)
TEST NO.1 IGNITION COil POWER TEST

SPARK GAP
PROBE TEST METER SET SCALE 4-6

e DISTRIBUTOR RESISTANCE

COIL POWER TEST

VOLT SCALE OFF ON

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives