How do I tell if I have a 12 volt Generator

Tom Fleming · Sep 12, 2009

I have a 1953 SM serial number L 505452 J. It is currently using a 12V battery. The starter is 3 bolt, and the generator is a Delco Remy number 1101355 1F18

Now, looking at pictures of some SMTA, and SWD6 pics, the genny looks the same, with the triagular bushing cap on the rear plate, with the oil cup.

I presume this is a 12v genny? Anyway to know for sure?

Janicholson · Sep 12, 2009

The ID tag on 12 volt generators were originally red in color. 6v were black. 6v can be converted to 12v. at a gen shop.
If it is charging now, it is probably a 12v.
If it is not charging, do the following test. Charge the battery till fully charged.
With it stopped/off. Jump the F terminal of the generator (small terminal) to a good shiny ground.
(does not need to be disconnected from reg)
Put a volt meter on the battery (across the bat posts) then start it up. At 3/4 throttle it should be making in excess of 14 volts Probably 15 or more. (an analog (needle) style meter is preferred) This is OK for several minutes.
If it is it is 12v gen. If it is like 13 volts it might be a 6v with a 12v regulator. JimN

Tom Fleming · Sep 13, 2009

Thanks Jim. I did a bit more searching on the net, and determined this started it's life as a 6V genny. Not sure if it has been converted, but will check.

How do I tell if I have a 12 volt Generator

Tom Fleming

Well-known Member

Janicholson

Well-known Member

Tom Fleming

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