New fuel filler grommet is torn...

I agree with the above remove the tank don't mess with the filler tube maybe loosen it. another person helps when rocking the tank to walk it on the filler tube. my filler neck had some corrosion roughness to it where it went in I used some 80 followed by 220 grit sandpaper and cleaned it up around the seal area. did the trick for me. good luck!