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Old 07-13-2017, 09:51 AM   #20
Duvie
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Join Date: Nov 2011
Posts: 340
Best guess without a wiring diagram

Sounds like your battery switches were still on. I think that your battery cable that was connected to the starter that you removed touched the starting circuit wire that you removed energizing it. This does not explain why the other engine cranked but how it received its power to crank. I am sure a wiring diagram would explain this though. When I work on a piece of electrical equipment I usually go on the assumption that there initially is only one problem and not coincidental failures. The one problem may cause many symptoms though. I have found this to be true 95 % of the time. I do not believe it was a coincidence that the other engine started on it's own and that the wires removed energized the starting circuitry.
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