Re: Motor running faithfully now, but.......
^^ Ya, the rubber seal may be creating a vacum -sp- in your tank and not letting the gas flow freely. This happended with one of my friends come to think of it. Although his was more effected, he comepletely sealed it up. If that doesn't work there are lots of posts on spark plugs in here if you think thats really it. Odds are its something little.
"Those who conform, lose all ideas"