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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Aug 2014 Posts: 307 'Bolter | | 'Bolter Joined: Aug 2014 Posts: 307 | How to tell the difference between a 6 volt and 12 volt starter? | | | | | Joined: Feb 2004 Posts: 29,851 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,851 | If the metal tag is still on the starter, the 6V ones have black paint, and the 12V are red. The 12V has a smaller-diameter armature shaft that the 6V, but I don't have a measurement handy for either one. Both starters have the same number of gear teeth, but the tooth pitch is different, IMHO.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Dec 2000 Posts: 3,399 Gas Pumper | | Gas Pumper Joined: Dec 2000 Posts: 3,399 | If you can see the flywheel, check to see if you have 4 teeth per inch (139 tooth SIX VOLT Flywheel), or a 5 teeth per inch 168 tooth (12 Volt) flywheel. You can drop the access pan underneath to verify. The starters are not interchangeable so its a very good idea to know for sure which one you have.
| | | | | Joined: Sep 2001 Posts: 29,270 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,270 | Yes, counting the teeth on the flywheel will confirm 6v vs 12v.
It is not so easy checking for a 6v vs 12 drive gear on the starter. The number of teeth are the same on 6v and 12v starters. Last summer, I caught a rebuilder (who knew better) using a 12v drive gear on a 6v starter rebuild. | | |
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