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Old 07-18-2009, 09:48 AM
76Red18 76Red18 is offline
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Join Date: Apr 2007
Location: NORTH FORT MYERS, FL.
Posts: 671
Default Re: ? about bonding fuel tanks

Quote:
Quote:
The fuel fill neck should be grounded separately from the tank ground. Both should be well grounded to the battery.

I also have an 8"x3" bronze grounding plate on my hull which provides over 12 square feet of grounding surface area in contact with the seawater. Since my zincs, motor, and electronics are also grounded to this plate, it really helps eliminate any electrolysis from happening apart from the zincs.

Please re-think this statment.. 8" x 3" is not 12 sqft of area.. Filler neck should not be grounded to the battery it should be tied into the bonding system, tank should be grounded.

No 12volt grounds should be put to any bonding system. Only frame grounds that are not used as 12 volt grounds should be added to your bonding system( ie antenna gounds or IG grounds)
I think he 's right. I was told that the plate is very porus which allows water penetration and that provides the high water to plate surface area. I'm with you on the bonding guidelines but I didn't ground my filler neck. If it's not in contact with any other metal , sea water or the electrical system , why bond it? Where would the static electricity or corrosion come from? If it's a fire risk I'll bond it but i don't see a hole for any terminal connection. Neck is screwed to the gunnel..Guess I'll have to through bolt it and bond it to that.
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