Sweet. Thank you for the dimensions and info! I need to do this since the other O-rings are not liking my constant tinkering.

Have a great Thanksgiving everyone!

 

Try soaking the old one in brake fluid. It will bring it back alive if it's not already dried to the point of splitting. I've not tried this specifically with a carb gasket but have used it successfully on rubber "O" rings in other applications. Good luck.