Wont start - Fuel Problems

My 91 b2200 wont start for some reason all of the sudden, so i started to check it out and realized that the fuel line under the hood that feeds fuel to the carb (the one with the little round filter on it ) is not spitting out any fuel. I am not very fimiliar with the mazdas yet, so what could the problem be? is there another fuel filter in the line somewhere before this one that may be clogged? fuel pump? maybe something dumb like a fuse? this is my first mazda so i dont know much about them yet... hopefully you guys can help me out

fuel pump is run off the side of the motor. on the head near the back. its mechanical. the line could be plugged somewhere from the tank up to the filter.

Okay thanks alot man, ill go take a look at that now, is that the only filter on the fuel line of these trucks? or is there another one under the bed somewhere?

thinkin thats the only one. the EFI trucks got that sock in the tank.

that EFI is a bastard to trouble shoot everytime something goes wrong.