Craftsman riding mower. Kohler 15.5hp CV15S. This is an

JustAnswer Customer: Craftsman riding mower.
JustAnswer Customer: Kohler 15.5hp CV15S.
JustAnswer Customer: This is an unregulated system.
JustAnswer Customer: I'm not getting enough voltage to charge the battery.
JustAnswer Customer: I was getting some continuity between the stator chassis and the black wire so I replaced the stator.
JustAnswer Customer: No change.
JustAnswer Customer: At best, * * tractor harness disconnected, only getting 11.7 VDC at full throttle (black wire)
Pearl Wilson: Assistant: What's the make and model of the mower?
Pearl Wilson: Assistant: And can you guesstimate how old it is?
JustAnswer Customer: Craftsman.
JustAnswer Customer: Probably about 10-15 years old.
JustAnswer Customer: I'll have to get the model number
Pearl Wilson: Assistant: Do you plan on doing the work yourself?
JustAnswer Customer: Yes
Pearl Wilson: Assistant: Anything else we should know to help you best?
JustAnswer Customer: Stator also has a brake (yellow wire)
Curtis B.: Technician: Welcome to JUST ANSWER small engines, let me try to help you !
Curtis B.: Technician: I don't know it all, but maybe together we can get you a satisfactory answer!
Curtis B.: Technician: Do you have the Craftsman mower model number or the rest of the engine model?
Curtis B.: Technician: There will be more numbers after the cv15.
Curtis B.: Technician: Did you replace the stator under the flywheel?
Curtis B.: Technician: Stator puts out AC voltage so it has to have a set of diodes or a rectifier to convert to DV voltage.
Curtis B.: Technician: The stator has to put out at least 28 volts AC with wires unplugged from tractor harness.
JustAnswer Customer: Mower model number#-#-# Engine CV15S Spec 41567 Yes, I replaced the stator under the flywheel.
JustAnswer Customer: It has three wires - black, yellow and green.
JustAnswer Customer: The old one is wired like this: black and green coming from the stator.
JustAnswer Customer: Black is split into black/yellow.
JustAnswer Customer: There is a diode soldered into the black lead after that split.
JustAnswer Customer: So, black should be DC, yellow is AC and green is the brake.
Curtis B.: Technician: Black is ground!
Curtis B.: Technician: Wire with no diode is DC for lights.
Curtis B.: Technician: Wire with the diode is the battery charging wire.
Curtis B.: Technician: I know nothing about a brake!
Curtis B.: Technician: See wiring schematic in the link below.
JustAnswer Customer: Normally, yes, black would be ground.
JustAnswer Customer: In this case, however, black has the diode and is the DC charging wire.
JustAnswer Customer: According to the diagram, I should be getting minimum of 28V AC before the diode with the charging system disconnected.
JustAnswer Customer: I'm getting 23 with a brand new stator.
JustAnswer Customer: So, my thinking is that either the new stator is bad or that maybe the magnets are getting weak and do not generate enough voltage as the flywheel is spinning.
JustAnswer Customer: Do magnets ever go bad?
JustAnswer Customer: I just learned about stator brakes myself.
JustAnswer Customer: That is a circuit Kohler added in order to reverse polarity on the stator so it can be used to help stop the engine within a certain number of revolutions when you turn the key off.
Curtis B.: Technician: Only way magnets go bad, is when they get broken or have cracks or they move and get out of position.

[gregstanley]

What is the purple wire coming out of stator on Kohler 20hp and what do I hook it to

[rontrombley]

Apparently the charging question never got answered. The customer knew more about the charging system than the Tech guys.