Re: Merc fuel coupler o-ring install Home › Forum › Ask A Member › Merc fuel coupler o-ring install › Re: Merc fuel coupler o-ring install opposedtwinUS Member - 2 YearsReplies: 968Topics: 259 October 27, 2018 at 3:33 pm #85050 Elto, I didn’t know those came apart. Maybe ask the question on the mercury website too. Lotsa guys over at that site would know. Dave B will know, and he’ll probably respond here when he sees your post.