Have a Kohler CZ23 would start, run, but quit before engaging power. Was told the main circuit board was the issue ( looked like??). replaced the board. Not the issue. Non returnable...$1200 including labour. Had the unit pulled last Fall. Second shot showed stator failure. Found a stator to match part no. in Florida and had shipped up. Now find the commutator is wrong size and...housing won't fit the drive. So far $2700 into this mess and no further comment from an incompetent marina.
Been shopping personally and can find no interest in re-winding the original stator, no help from Kohler... or any of their dealers. This kind of situation makes me extremely unpleasant. There will be a reckoning.
Not sure what others have gone thru' with this situation, but would like to hear any good news in getting these things running.
Too many safety quirks on the genny for me to deal with ... for now.