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post #4 of Old 08-29-2010
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Once you figure out exactly where you want the hole (don't put it so close to any existing holes that the material between them is likely to fail), drill a pilot hole first using a bit significantly smaller than the centering bit of your hole saw (to prevent it from "grabbing" when you drill the larger hole), check from both the inside and outside to make doubly sure you have clearance. If everything looks good drill your hole. Seal the newly exposed laminate and about 1/4" of the inner and outer surfaces of the hull with epoxy (this should be hidden by the new thru-hull), letting it set up and thoroughly cure before installing the new thru-hull.
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