I have had my engine sitting for about 1 1/2 weeks now since I last ran it. I pull fuel from a can still, and when I'm done running it I let the line drain down into the can and then just coil up the line.
Well, yesterday I looked at my line and fuel had collected in the glass filter below the pump. The fuel was brownish colored so I touched it and rubbed it between my fingers and it was oily.

How did this oil get in my fuel??
The only thing I can think of is the fuel pump. Should I just replace that piece of junk before it cruds up my new carb?