ABI was kind of a strange company and they made several different versions of bronze portlights
. Some gaskets can be replaced in a matter of seconds, others take a complete refit
. MY portlights
are ABI and all I needed was 3/8 epdm rubber from Mcmaster Carr. You simply take a dental pick and remove the old gasket
material out and hand press the new gasket into place. You dont need to add any sealant
. I have heard others using the 5/8 epdm that the fit was more secure but to dog down the hatch
was a PITA. Thats it, no need to remove the pins and make the job much bigger than needs to be. I replaced all 12 portlight gaskets on my boat in the matter of a afternoon. Good luck and let us know how it goes.