Just got my 3A back from Colorado. Needed a new battery. Old battery seemed to have reversed polarity. Put in new battery 12V. Has been converted to 12V by PO. Started and ran great. Moved it around the yard. After about an hour noticed smoke emitting from under the hood. Immediately disconnected the battery. Generator and voltage regulator were hot. Suggestions as what to look for? Did not have this problem when it went to Colorado, but was not driven and battery was dead, had to pull start it to get it on trailer.