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Thanks for the advice. I hadn't even thought about the drain holes. I watched a video or two just now to see how to replace them. I find it so cool how different manufacturers approach different problems. I have two other boats and I have replaced old plastic through hulls on those. Is there a recommended period that Boston Whaler recommends to replace them due to the rubber getting old? I imagine if these fail, then water gets into the hull and water-logs the foam?