For those of you that are in a pinch and need fuel bowl valve 0-rings you can get them at ace hardware here are the sizes and part numbers.....Valve stem o-ring is #41 p/n..35755b.........the drain valve O-rings are ....#90 p/n 9D0035870B......I was in a pinch and wasn't able to order from one of the vendors so I had to do it,they cost about 3.00 for all three and are made of nitrile butadiene....probably not as good as the ones you can order from the vendors on the board but will get you by,i hope this helps