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Old 08-26-2011
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thru hull and seacock size for 1973 irwin 28.5

I'm looking for the size of the cockpit drain seacock and thru hull for a 1973 Irwin 28.5
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Old 08-26-2011
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Measure it.
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Old 08-26-2011
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Measure the hole, figure out whether it's going to need a mushroom or flush head, and measure those for the flange diameter. I would venture to guess 1-1/4" with a 2" mushroom, give or take.
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irwin 28.5 , seacock , thru hull

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