Quote:
Originally Posted by MikeK
There is a reason things are breaking! A 6V starter on 12V will deliver four times the torque, not just twice as much. Power =amperage squared times resistance. The amperage will double for a 6V starter on 12V. When you square that, you get 4X engagement slam force.
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I don't know what the correct formula is but I'm pretty sure this is not correct. Power is not torque (they have different units). Torque is the relevant quantity here, corresponding to "slam" force.