Yeah I know lots of people say you can run a 6 volt starter on 12. It is true. However the question now becomes "for how long??
From industrial electrician experience I have observed that motors operated within design parameters last a long time. If your goal in life is starter removal replacement and rebuild this practice will satisfy that goal.
ALSO
you can look for current when all is shut off with lite bulb. Just stick between batter post and cable either side does not matter. No glow then no current. Use 6 volt or 12 depending on battery voltage.
Dan Bentler
