I have the Sullivan plastic clunk tank with 1 line to pressure and the other line with the clunk to the carb. I would like to use the other hole for a refueling line but how do you make the hole in the rubber stopper for it? I am also going to change all the brass lines to copper to prevent fuel contamination issues. Tim
The stopper should have a hole molded most of the way through -- Look on both sides, one should show two holes, the other, three. I just push a tube through, being careful that I'm not going to impale my hand on the tube when the rubber gives way.
You could sharpen the tube, or poke the hole with an ice pick or xacto knife.