How many volts the charging system of a 500 Mercury - 1972 should deliver ?<br /><br />With battery disconnected I got 17.0 V - with battery connected ( full charge ) I got about the battery voltage 12.7 <br /><br /><br />Thanks<br /><br />Smokey
Don't test the system for output when disconnected from the battery, the sytem is about 6 amps at WOT. the voltages vary somewhat depending on the type of battery and condition of the system they range from 13v. to 18v. at WOT
