I replaced the gaskets in my 8 Atkins & Hoyle portholes last summer without removing the portholes. This includes two 25” long portholes and six 12 “ portholes. A little awkward working upside down but not too difficult. Do not use excessive adhesive as it will simply squeeze out of the gasket channel molding. I did not pre-cut the gasket to match the channel length, instead I squared the starting end of the gasket with an exacto knife, installed the gasket into the adhesive and made the cut for the finishing end of the gasket when an inch or so from the starting end, using a small wood block held in-place as a cutting surface. This avoids stretching a too short gasket and ensures it’s seated at the corners. Sometimes it took two people, one to hold the block and another to hold the gasket, and make the cut. You want the gasket ends the touch; I put a small amount of adhesive on each end to complete the bond, then closed the porthole so the adhesive dries under pressure.
Ken Dakin
NS 33 #7
Sashay
Kingston ON