Quoting Removed, click Modern View to seeWell, sort of but not really.
If you have 2 circuits designed to do the same job, one intended to be 6 volt and the other 12, the 12 volt circuit will draw half the current. Lower current only needs smaller wires. If you have a simple resistance circuit designed for 6 volts and apply 12 volts, it will draw twice the current until something melts.
However, a starter is not a resistance curcuit. It is (surprise!) a motor. When a motor is spinning, it acts like a generator. The voltage produced pushes back against the voltage from the battery, reducing the current that is flowing to the starter. The faster the starter spins, the greater the back voltage and the less the current. A free spinning starter produces a lot of back voltage and draws surprisingly little current. This is also why bad cables get hot so quickly when a starter is jammed. If the starter isn't turning, you have a virtual dead short.
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Today's Featured Article - A Question for Dads This recent topic from the Tractor Talk discussion board is being highlighted because it is an awesome display of the caliber of individuals that have made this site their own. The young person asking questions received positive feedback and advice from total strangers who "told it like it is" with the care many reserve for their own kids. The advice is timeless... so although it isn't necessarily antique tractor related, it will be prominently displayed in our archives to honor those who have the courage to ask and those who have the courage to respond in an honest, positive manner.
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