Z20 carb is seeping petrol

[Datsun1986D21]

Sorry for the dumb questions. 
 

I’ve noticed a small amount of petrol seeping from near fuel inlet line (red arrow, and ignore the lack of connecting tube to the right lol).

 

I feel like I remember there was a gold or brass washer sitting where the blue arrow is pointing in the other attached photo. 
 

Does that sound right? If so I’ll buy the right washer and try that. 
 

also, what is that thing inside the hole?(blue arrow photo) 

[Crashtd420]

The blue arrow is pointing to the needle that controls the fuel entering the fuel bowl.... it's controlled by the float....

You probably have to remove the front cover to reset that....

 

[datzenmike]

 The inlet fitting should have a small wire clip? attachment that holds the needle valve loosely in place. Pointy end up and flat end down. The float rises and pushes the needle up and seats it shutting off fuel.

 

 

Above the inlet fitting is the banjo fitting. There's a very fine brass or plastic screen in there with soft copper or aluminum washers. Once used they may be marked up and not seal right a second time. I have cut them out of thick gasket paper before.

[Datsun1986D21]

Thanks guys that answered my questions  I appreciate it 

[Stoffregen Motorsports]

Carbs don't seep petrol. They seep gas.

[datzenmike]

A carburated, Z20 powered D21? I'd say he's not from around these parts.