Blair, one thing worth mentioning is tank construction, some boats of that vintage including ours came with an aluminum holding tank. The PO used a chlorine odour product and the tank disintegrated along the bottom edge. If yours is plastic, that’s better than aluminum and I would check the inspection port because they can also crack. If the smell goes and comes back with the valve closed it’s probably not your tank. Sometimes a flashlight and small mirror are your best diagnostic tools. You should also have a vented loop you can check up high behind the head. Let us know how you make out. Len Mitchell Crazy Legs 1989 37+ Midland On.
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