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Multi-Cylinder Stationary Gasoline Engines and Power Units Waukesha, Buda, Climax, LeRoi and others.

Multi-Cylinder Stationary Gasoline Engines and Power Units

Le Roi battery polarity

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Old 09-15-2019, 06:15:12 PM
Wardbrook Wardbrook is offline
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Default Le Roi battery polarity

The Le Roy D176 I recently picked up has a battery (which is totally dead) hooked up to it as positive ground. Does anyone know if this is correct polarity? I can’t seem to find anything in the “instruction and part manual” which came with it about this.
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Old 09-16-2019, 10:12:01 AM
FarmallBob FarmallBob is offline
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Default Re: Le Roi battery polarity

Most likely it came from the factory wired positive ground. Positive ground was pretty much standard until the introduction of alternators in the early 60's.
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Old 09-16-2019, 04:55:08 PM
Andrew Mackey Andrew Mackey is offline
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Default Re: Le Roi battery polarity

That would be the case for 6 volt systems. When the manufacturers went to 12 volt, most went to negative ground. A lot of trucks were 12 volt positive, until autos switched out. When alternators came out many went to negative. If your engine has a generater, you can reverse polarity if you 'polorize the regulater. If you have a delco unit, battery positive to the armature will do it. You cannot swop leads with an alternator!
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