Not to get into a long story I ruined the o-ring. I had my local shop order me one in. I should have asked a few questions before I did. The o-ring comes packaged with the spring and the flat washer at a cost of 27 bucks . I'll be checking the bins a lowes for somthing this tiny, I can see loosing or having future problems while rejetting and needing to remove the zipty fuel screw. Anyone find a replacement at a reasonble cost for the o-ring?