unscrew the bronze screw on the bottum of your zippo "guts." there will be a long spring attached to this, pull it out. turn your zippo right side up,...
these are step by step instruction on how to replace the flint in you Zippo with some from a disposible BIC light that has run out of gas.
Step 1: Removing the flint and disassembling your zippo
if your flint is too small from being worn down, or just completly gone, you will need to take apart your zippo. do this by removing the metal portion fomr the colored shell, the same as you would to refill the lighter.