Gas leak on Generator

I have a gas leak in my generator. I had to take the air filter "holder" for lack of not knowing what's called to get to the part. I tried to tighten it up. Just don't know where to get these parts at. Any help would be appreciated.

In the pic you'll see where I tried to tighten it up. That's where the gas is coming from. Thanks again.


Gas leak by photo.paul.moore, on Flickr