Attaching a picture of a hanging part.For the last three years I have religiously adhered to maintenance of my generator. It has always cranked right up and I put loads on it. It has never been used for any purposes other than regular testing. I do this about every 2-3 months. I went out today to run the test and it would not start. It took me a minute but I noticed a small stream of gas when I turn the gas valve to the run position. Then I noticed this part hanging down. It doesn't screw-catch but fits perfectly to the part above it. I am not sure how to make it stay put as there are no set screws either. Can someone tell me what this is? I am sure gas must run through it.