Loose Through Hull - Striper Talk Striped Bass Fishing, Surfcasting, Boating

Van · 04-21-2007, 10:31 PM

Cool, I'm sure I can make something up pretty quick.
After all, I got that shop.

maybe a pipe with two cut outs....I can mill them out.

Fast curing 5200, I'll go to west marine and pay thru the nose !

Anyone here about this "grounding" of the thru hull?
I 'm pretty he said attached to a block zinc on the transom.

But like i said, I don't have a corrosion problem with it.

fishaholic18 · 04-21-2007, 11:01 PM

Yeah, eventually electolysis will eat up a bronze thru hull, I guess that's why a lot of the manufacturers use plastic now. I would think if you just grounded it(they usually have a grounding bolt on them) to battery neg. it would work, since the battery neg. is grounded to the motor anyway. I tried to Google it but came up with nothing, I'm gonna keep looking though, I'll post if I find anything else.
I had mine grounded to battery neg. and didn't have any electrolysis in the 5 years I had my boat.

fishaholic18 · 04-21-2007, 11:11 PM

Found this:"You need to wire together all your underwater bronze
thru hulls and run a grounding wire to the engine
block to avoid electrolysis."

http://list.sailnet.net/read/messages?id=24370

Hope that helps.

nightfighter · 04-22-2007, 05:46 AM

I consider 5200 a permanent install. It's a real PIA to remove anything installed with it. That said, remember, your fittings can be attacked by the electrolysis coming from a neighboring boat, whether in a slip or on a mooring.

Van · 04-22-2007, 10:20 AM

Just went to West marine ONLINE to look at fittings and I saw an article on grounding. here what it said about thru hulls. I think this apples to mine.

Zincs and Protection from Galvanic Corrosion

An isolated bronze thru-hull doesn't need protection because it is not in electrical contact with another immersed dissimilar metal. If electrically isolated, high quality marine bronze, is electrochemically stable in seawater; nothing good can come from connecting wires to it.

Van · 04-24-2007, 07:21 PM

Worked out well thanks for the help.

Got that 5200 quick cure and it worked great. Got everything apart with out much trouble. Then got ripped off at West for a new valve 34$.

To get the fitting out, I took a 14mm deep socket and used a die grinder to make the perfect tool. Should be floating this weekend.