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post #1 of Old 07-13-2007 Thread Starter
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electrical bonding

Having lost a keel bolt to some sort of exotic corrosion, I have decided to replace the entire bonding system.
And promptly run into a puzzle. I read where all the experts declare that the bonding system and the DC negative must absolutely be kept entirely separate. So far, so good. I ask, though, is not the prop, the shaft and the engine part of the bonding system, and, at least on my boat, the DC negative current runs via an engine-mount back to the negative terminal of the batteries.

How does someone who understands a lot more of all this explain the contradiction?
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