My SS through hull fittings aren't grounded. Should they be? Boat is dry stored but may stay in salt for 5 days every so often. Ive never seen any problems.

Usually you only find bonding wires on thru hulls that have valves on them and that are under the water line when sitting in the water. Like water intake fittings for a/c, engine water, bait wells, etc. Most other thru hull fittings like a/c, bilge pump or any other discharge fittings usually do not have a bonding wire.

All metal that touches the water should be bonded to your grounding system. Any dissililar metal that touches water has an affect on your boats galvanic system. This could either be a grounding bus or or grounding junction where all your DC grounds should be common. I always thought it a ridiculous overkill to do this, until I saw the cost of replacement parts when you did not. Ouch!

Of course I am saying this as a previous owner of a 34-ft Sea Ray that stayed in the water 24/7/365. If your trailoring or only in the water for a day or two, it is not generally an issue.

Alot of boats will have the trim tabs bonded as well. My Fountains have been. The idea is to get all metals to same potential. Not only is it for dissimilar metals, but for electrolysis prevention too.

You know its really hard for OSO'ers to stay Grounded, Let alone their boats!!:lolhit:

Crazy Regards,
Ray @ Raylar