Maybe, but not likely. A generator armature core is made up of dozens of layers of thin steel plate, and the plate is "mild steel" which is not capable of retaining much magnetism. The momentary connection made between the Bat and ARM connectors sends what's basically a dead short from the battery to ground through the armature windings. This short surge of heavy current creates what's called "residual magnetism" in the armature. If a polarized generator is spun up without any wires connected to it, a small voltage (usually 1/2 volt or so) can be measured at the armature terminal. This small voltage is what kicks off the charging cycle by allowing current to flow in the field coils, controlled by the regulator.
If the armature has no residual magnetism it won't charge at all, or if it's been polarized the wrong way, it can actually recharge a totally dead battery to the wrong polarity. This can severely damage a battery. A quick flash with a jumper lead at the regulator wires assures the polarity will be correct.
Jerry
