On my Takeuchi machines, w/ Yanmar engines, my illustrious operator remove the fuel filler neck screen when refueling. Then they use the fuel nozzle that's been laying in the bed of their filthy work truck. "The screen makes the fuel splash back", they say. The result is blockage of the inlet elbow at the water separator.
Anyhow, mark and disconnect both fuel lines at the fuel water separator. Loosen the bowl mounting ring a little bit. Unbolt the separator assembly from the machine, and disassemble the bowl etc from the head. Thoroughly inspect the inlet elbow for debris. Wash all the inner components and reassemble. Install on machine, connect hoses, ensure fuel lever on separator is in the on position. Turn key to run, wait 2 minutes, then start machine.
I have had the inlet filled with plastic, straw, tiny rocks, paper, and a bit of unidentifiable matter. Had the same inlet elbow bricked shut on my 350hr SVL75 Kubota.