Last week a Brewer owner ask where to get A.B.I. Port gasket material. The answer is Mc Master -Carr in New Jersey. Their phone # is 609-689-3000 The item # is 9700K15 Buna-N Square O-Ring Cord Stock 3/8" Fractional Size, .375" Actual Size It was $ 1.55 / foot & it takes approx. 3 feet to do a port. My boat has 16 of them. Drive the roll pins out (there are two on each port forming the hinge) Once removed & the port is in your hand take a flat tipped #2 screw driver & remove the old gasket material. Once cleaned up start mid way between the roll pins & force the new gasket material in the groove keeping the splice at the top. When you are all the way around the port cut it at least a 1/2 inch long & then keep pushing the rubber materialout into the groove till the last part of the gasket material slips into the groove It should be very tight & since the splice is on the top it will not leak. It takes about 3 feet of material for each port. If you have 16 as I do you need to buy 50 feet. I would get some extra for future use. Keep it in a cool place out of the sun & it will be good many years later.
Hope this has been a help to you. If you have further questions feel free to call me Fred Chance (717) 580-8191.