First off I’m far from a small engine mechanic . I’ve got a push mower that doesn’t get used often. Last time using it it ran like it maybe had water in gas . So I drained it and decided to take carb off . Got it put back on and it’s leaking gas out of the little white nipple above gas line connection. Pretty sure I didn’t remove anything off of the white nipple , but it sure looks like it should have something there . Any ideas , thanks ! This is a picture of one I was about to order..