Kohler k241s charging?

Parke1 · Sep 23, 2008

Hey gang,

I have a Kohler k241s that's been transplanted into a Speedex 1430. I didn't do the swap, and I'm trying to learn as I go. This motor doesn't charge the battery when it's running. It has a starter motor that turns the flywheel via a belt, but I'm wondering if this unit is a starter-generator. If so, how should it be wired to charge the battery? There is a regulator-looking box on the top of the starter with three terminals on it, but nothing attached to the terminals. There is one wire that leads from a post on the starter up into the regulator. There are no wires coming from underneath the flywheel.

Any help would be greatly appreciated!

Thanks!
-Parke1

Tom Arnold · Sep 23, 2008

Yep... You have a start/gen unit.

You need a starter solenoid and a proper keyswitch that has a "START" position on it to make all of this work. And having an Ammeter in the circuit is not a bad idea either.

Seems to me there was a couple of diagrams in an earlier thread. I'll see if I can find that thread for you.

Tom Arnold · Sep 23, 2008

Take a look at the thread in the link below. The wiring diagram with the solenoid would be most appropriate for your needs, IMHO.
Past thread

El Toro · Sep 23, 2008

That's a very good wiring diagram with a S/G on a Kohler. Hal
PS; I have the same setup on a Wards tractor with a B&S engine. I had to change the solenoid last year.

Parke1 · Sep 24, 2008

Tom,

Thanks so much for the wiring diagram. I still have a couple questions, though. In both versions, (mine would use the top one with a separate starter switch and no solenoid) it apparently shows a four terminal voltage regulator. My regulator has three terminals on it. Am I reading something wrong, or do I need a new regulator with four terminals on it?

Thanks!
-Parke1

Tom Arnold · Sep 24, 2008

Actually, El Toro deserves the credit for posting those diagrams in the other thread.

About all I can tell you is what Case tractors use because that's the marque that I am into. All Case tractors use a regulator with four terminals. Perhaps El Toro will chime in here with his knowledge about other brands and remark on whether a three terminal regulator will work or not. And if so, how you would go about wiring it.

I am not aware of any after-market 4 terminal regulators either. An OEM Case regulator sells for about $75.00 at the dealer but used ones appear on e-Bay all the time for as little as five dollars. You need to be ready to wire it in right after receiving it to make sure it works or you'll be SOL with the Seller later on if it won't permit charging.

El Toro · Sep 24, 2008

Are you sure its a 4 wire regulator in that sketch? One is a ground you could solder the ground wire. Hal

Tom Arnold · Sep 24, 2008

If you look carefully at both diagrams, you will see that there are 4 terminals PLUS a ground. Presumably, the housing of the regulator needs to be grounded.

Parke1 · Sep 25, 2008

Just to give you an update, my Kohler/Speedex is now officially charging! The regulator may be hooked up in a rather cobbled fashion, but hey, it works.

I basically just figured that one of the three terminals had to be the field terminal, and another should be putting out voltage when the field terminals on the regulator and generator were connected. I got lucky, and guess the right terminals on the first try!

I still need to buy and install an ammeter, but it works for now!

Thanks again for all your help!
-Parke1

El Toro · Sep 25, 2008

I don't have anymore diagrams on regulators using
a starter/generator except for the one on my Wards tractor with a starter/generator. Have plenty using the stator and regulator. Take a look at the diagram on my tractor. Hal

Kohler k241s charging?

Parke1

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Tom Arnold

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Tom Arnold

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El Toro

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Parke1

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Tom Arnold

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El Toro

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Tom Arnold

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Parke1

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El Toro

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