[Mr Paul]

That gromet looks worse for the wear after being removed. If it were mine, I would get a new one and use a wipe vasoline on it to reinstall. The grommet can't be that much. The old one looks torn up due to age and gasoline fumes swelling it up to the point It can't be reinstalled. Had the same issue with a Red Max 2 cycle trimmer I borrowed from son in law that was a big leaker. New one was like $4 and sealed perfectly. My $0.02 worth