1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 69Get this manual
Ignition Test Procedures Direct Voltage Adapter (DVA) Test for Stator WARNING
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 engine
DO NOT CHANGE meter selector switch position while engine is running andor being "cranked" ALL COMPONENTS MUST BE GROUNDED during testsRunning or "cranking" engine with TPM or CDM ungrounded may damage componentsIf using meter with built-in DVA, the DVA400 VDC (or higher) test position should be used
NOTE: Test leads are not supplied with the DVAUse test leads supplied with meterTest procedures and specifications are provided for checking primary ignition voltage while the engine is running andor being "cranked" with all harnesses connectedInstall test harness between ignition harness and CDM as shown
WARNING
When testing or servicing the ignition system, high voltage is presentDO NOT TOUCH OR DISCONNECT any ignition parts while engine is running, while key switch is on or while battery cables are connected