Hi all. I just finished tearing apart, and putting back together a Savage 25 I bought used. The one thing I noticed when trying to run the truck is that the carb seems loose, and fuel seems to be leaking out of where it enters the engine. I really cranked down on the screw that holds it on, and I don't think I can screw it in any farther but the carb is still loose, and I can easily turn it back and forth, although I can't pull it out. Should it be doing this? If not, how can I fix it? Is the fix as simple as putting a new o-ring in it? Thanks for the help.