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Old 04-15-2021, 10:08 AM   #13
rslifkin
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City: Rochester, NY
Vessel Name: Hour Glass
Vessel Model: Chris Craft 381 Catalina
Join Date: Aug 2019
Posts: 7,554
This is definitely pretty typical of un-tinned wire if it's been exposed to a lot of salty air (or water), or battery gases, or even gases from gross water festering in the bilge and breaking down (you'd know about this from the smell though). Unfortunately, un-tinned wire has a limited service life, especially outside of the cabin unless the ends are perfectly sealed.
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