1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 60Get this manual
IGNITION
Ignition Troubleshooting
Tool: MultimeterDVA Tester 91-99750A1
Component Test Coil Primary Ignition Charge Coil Ignition Charge Coil Stop Circuit Selector SwPosition 400 DVA 400 DVA 400 DVA 40 DVA DVA Lead Red Coil () Black (B) Lead (2) Brown Blue BlackYellow DVA Lead Black Coil (+) Orange (O) Lead (2) Ground Ground Ground Voltage Reading(1) 300-3000 RPM 200280 (1) 230280 (1) 2045 (1) 58
If using meter that requires DVA adapter, place selector switch to the 400 VDC position Reverse Polarity (1) Readings may vary at cranking speed or at idle speed(2) Back probe the electrical lead bullet connector in order to make connection