For what it's worth, here are some pics of the shaft diameter on my 6V starter. Supposedly the 12V has a larger shaft where the gear rides. It would be an easy way to check to see whether your found starter armature is 6 or 12V.
Although the spiral splines vs straight splines on the 6V starter should be a dead giveaway.
[on edit] those spiral splines may be for a solenoid operated starter, not a stomp starter.
Attachments
IMG_4414.JPG (344.25 KB, 118 downloads)
6v STARTER ARMATURE SHAFT
IMG_4413.JPG (220.54 KB, 118 downloads)
6v STARTER DRIVE SHAFT DIAMETER
IMG_4411.JPG (171.78 KB, 118 downloads)
6v STARTER PILOT DIAMETER
BLANK.jpg (227 Bytes, 114 downloads)


Last edited by klhansen; 09/06/2023 7:22 PM.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.