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Thanks. I did get a new battery. And as it turns out, I got an OEM regulator from a guy in town. All A-OK now. Thanks to all you who helped!

Oh, I did finally understand what Bertsmobile1 meant about the diodes. The + terminal of the (unplugged) regulator has continuity with only one of the stator terminals. None of the three has continuity with the regulator body. The regulator body does have continuity to battery - , though.

UPDATE: I ordered a replacement regulator/rectifier. Amazon, $13.99. Hope it arrives soon. I verified that the existing regulator frame is grounded. I left everything connected a usual, then added a jumper wire from battery + to the purple wire at the regulator. Still only 12.47 V at battery...

The part about terminals while connector at regulator is unplugged, I don’t follow. When everything is connected as normal, I measure battery voltage (12.47 VDC) at the purple wire on the regulator connector with the key on . I measure around 30VAC between the two white wires with engine...

Thanks Bert. I plan to spend some time on it tomorrow. I will update here as I discover more. The mower is a CubCadet 2206, circa 1999-2000. The engine is Kohler CH20S. I am suspicious that there may be a short somewhere. One day last year while mowing, the engine wound-down and died. It would...

Cool place. I have already gotten some good info

Thanks. It’s aKohler CH 20S. So, after being thoroughly confused, I got my other digital VOM. Battery out of mower, reading 12.5, dropping to 12.27 in 25-30 minutes. I have an old Sun load tester and it’s saying battery is weak: replace. On my way to fetch new battery. I also cleaned...

New guy here. Just posted a question in CubCadet, I think. I’m in central Illinois. I have owned this Cub2206 since new in around 1998/2000. Mow almost an acre yard. Had to fix a few things over the years. I’ll be around from time to time.

Update: I removed battery. It is 42 months old. Out of the machine it measures 13.4 V. Why?

Battery was dead when I went to start engine about 2 hours after shutting down following 2 hours of mowing. Suspect battery is junk (it is at least 3 years old). BUT…when I charged it overnight, it came up to 12.5V and started engine, and here’s the thing, when I measured V at battery while...