I have a 16 ft aluminum boat. Two weeks ago it starting taking on some water and upon inspection I found a small, 1/8" hole in the bottom of the hull, 2/3 back from the bow on the flat, horizontal surface. The floor is covered so I can't see if there is water standing in the hull or not. I also found some spots that appear to be corrosion spots (appears to be corroding from the outside going in since they are not leaking). They are closer to the bow (V-bow). I use the boat mostly for crabbing and fishing (salt/brackish) but it is trailered, never left stored in water. For extended periods (3-4 hours, I use the trolling motor while crabbing. The hull is not grounded to the battery (at least not on purpose). Is this most likely galvonic corrosion caused by electrolysis? What could be causing it? I have read that "reverse polarity" may be the culprit. Not sure what that means on a boat. How can I test/check for that?
