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    1993 Merc 200 overcharging

    "I have a '93 merc 200, 2 "I have a '93 merc 200, 2 batteries with switch, lots of pumps and electronics. The engine charges great, 14.5 to 15 VDC, when we first leave the dock. After what seems long enough for the batteries to top off, the regulator jumps voltage to 18+vdc and my GPS and...
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