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Check the meter first. Easy, and the wire numbers are on the wire and the wire schematics are on the door. THEN look at the alternator.

If the alternator is not putting out the right voltage, then the rubbing the post is not really going to tell you anything. Thats what I was trying to write. Its not a matter of you having a parasitic "load", or draw, on the batteries, and its draining them. Thats not your problem. The...

If the Alternator will not produce the required output voltage, (and it is not doing so IAW the alternator out put test) then the problem is not a "phantom vampire" problem. Its a problem that just might have to do with the voltage regulator. And easier way to prove your "phantom vampire"...

It should take longer then that. But it never hurts to have someone else to start the set and you check voltage.

Both the alternator and Regulator numbers are right. So when the wires are hooked up right, then it can only be the Battery charging alternator. On start up, every start up, the battery Charging Alternator should go up to 27-29 VDC, at least for a short time, before the Regulator "see's" that...

Maybe not defective. Not adjusted right. And thats something I have no idea about. The army is a pluck and chuck user. Can you post a picture of the alternator and the data plate on it?

Lets start here. I know you said you have done some checking. But somehow we are missing something. So one or two steps at a time. c . Using dead crank switch, crank engine for 15 seconds while observing multimeter. Voltage reading should not drop below 9.6 volts DC and should return to 12...

Do you have another thread concerning this gen set?

The Battery charging alternator is hooked up like the picture?

Have you put the batteries on a quality charger? Have you load tested the Batteries.