Gas line filler question. New to boating.

[Dubbies]

Hey guys, I'm new to boating and I got this gas filler for the boat. I'd like to install one since I got a larger tank for it.

This one came with the boat, the guy never put it on. It has some sort of build up on the inside. What is it? Is it safe to use? Is there a good way to clean it?

I don't mind buying a new one... Just figured I'd save money if this one is OK.

 

[gonzo]

You can clean it with a small wire brush. Some carburetor cleaner would help. However, I don't think it is much of an issue. Good luck.