I just bought a new fuel tank for my 1961 Mercury Monterey, and it seems like the lock ring that came with it is too small and not getting tight enough. The tabs on the lock ring are against tabs on the tank and I did it by hand easily. I did install the supplied seal. I’ve never done this before so I figured I’d ask on here to see if someone can see a mistake I’m making.  I will attach some pictures once I figure out how to.