Fresh water fill port 2003 228 seafarer

Bull1

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Does the fill port have a rubber O ring and what size is it. Does the screw on cap have a gasket and what size is it.
 

seasick

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I think the cap has an o-ring. You will need to match up the cap at the store to get the right o-ring. The caps come in different diameters. I do not think there is a gasket in the deck fitting . There ar none on my two water fills.
 

DennisG01

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The cap definitely has an o-ring - just match it up.

I've never seen a gasket used along with an o-ring - that wouldn't make sense.