F'n carb

Lube the O rings with some oil ( just get some off the dip stick ) then when they are on the tube and your putting the bowl back on, spin the tube while you push the bowl in place. It should go right on. Don't toss out the old O rings, when they get gas on them they swell up, If you let them dry, they will shrink back to normal size. Next time you make a jet change you will have O rings and oil from your engine to make things a little easier !
SIKPUP