Mercury Mariner 8/9.9HP 4-Stroke Factory Service Manual, Page 43Get this manual
Ignition Troubleshooting DANGERHIGH VOLTAGESHOCK HAZARD! Do not touch ignition components andor metal test probes while engine is running andor being "cranked"STAY CLEAR OF SPARK PLUG LEADSTo assure personal safety, each individual spark plug lead should be grounded to engineWhen testing or servicing the ignition system, high voltage is presentDO NOT TOUCH OR DISCONNECT any ignition parts while engine is running
WARNING
WARNING
Tool: MultimeterDVA Tester 91-99750A1
Component Test Coil Primary Stator Charge Coil (CDI) Unit Stop Circuit Selector SwPosition 400 DVA 400 DVA 20 DVA DVA Lead Red Coil () Black (B) Lead (2) Brown (Br) Lead (2) (CDI) Unit White (W) Lead (2) DVA Lead Black Coil (+) Orange (O) Lead (2) Ground Ground Voltage Reading(1) 300-3000 RPM 200-340 (1) 210-340 (1) 2-5
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