Suzi, in my opinion, just my opinion, it's not Kosher to start another post which results in the same discussion. This can lead to great confusion and wasted effort. Folks may read one and not the other. Two steams begin and repeat each other. Both posts talking about part numbers and shaft sizes. We do try an avoid that. I would have liked to have known about the other. Anyhow it's all linked together now.


https://www.stovebolt.com/ubbthread...557/which-starter-is-6v.html#Post1435557

NOW, just because of my engineering background: Both Suzi and others show caliper reading pics of .558 but neither posted that number. I think Kevin could get .558 with two hands.
The number for 6V is .558 diameter.
3B says .551 but he is using MM and gave a flat 14mm, may not be an exact measurement. 14.17mm= .558. His other measurement is a flat 12MM so he, or his measuring device, is rounding.
I'm being specific for the future. This and the other post will be the gold standard when the world googles how to tell 6V vs 12V old Chevy starters smile

Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn