Things you can find in your fuel system….

I’ve been having a bit of trouble on and off with my fuel system. What I know is that I originally put in a filter system that was too much of a toy. So I’m going to replace it with some more professional equipment. In the meanwhile, I wanted to make sure there was no water or dirt in the tanks before I put the boat on land. So I thought I would run all the fuel through the  filters a couple of times using a circulation pump. But in the process of doing that the suction side of the pipes got completely blocked. After taking everything apart to its pieces, I found this sitting in one of the hose nipples:

It is a small piece of silicon. A perfect block. I would really like to know what it is and how it got in there!!!