Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 76Get this manual

IGNITION
IGNITION COIL (SECONDARY)

METER TEST LEADS RED HIGH TEN SION lEAD BLACK BlK

METER SCALE

READING

Spark Plug Cap Resistor Test-PIN VOFP

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