1985 OMC 65, 100 and 155 HP Models Commercial Service Repair manual, PN 507450-D, Page 182Get this manual
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4 No voltage or low voltage at pinhole "A" or "B," turn adapter switches "A" and "B" "Off Crank engine Check volt age at pinhole "A" and" Meter should indicate 160 volts or higherMeter does indicate 1