I acquired 2 hustler 1500 shortcut mowers. 1 54inch 26hp kolher. 1 48inch 22hp kohler. I can't get the 26 hp mower to charge the battery. 13.4 ac volts out of the stator. new battery. fuses are good. clean connections. swapped rectifier and ign. switch with the other mower (know to be working) and tested all 3 relays (all working)