FWIW, if you need to patch an active leak below the water line, get some JB Weld WaterWeld from an auto parts store. It will cure in the presence of water. There are other similar products. Search for pool repair epoxy, etc. Keep a tube on your boat.
Also keep a couple of toilet bowl wax rings on board. Dennis C. Touche' 35-1 #83 Mandeville, LA
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