I have a 1953-54 Evinrude 15hp motor and I am trying to replace the o rings inside the fuel connector. Does anyone have any idea how to get to the O Rings? I tried taking off the air and gas lines and punching the brass rings out that way, but they are pretty tight. I was told that was the way to get them out. Is this correct? If so what do I use to remove them? If not, how?