How does a starter motor change polarity?

marcksomzh

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8 Jul 2010
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I always disconnect the negative (only) cable from my battery (boat/outboard motor) when I bring it in. Yesterday, I connected the negative cable back to the post, tried to start and the starter would spin but (after MUCH investigation) I discovered that it was spinning in the wrong direction. I disconnected/reconnected the negative cables and, voila, it started spinning correctly.
 
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