Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Loosen the air bleed screw at the injection pump inlet line, and let the fuel flow. Kubota has electric fuel pump, so turn the key on while bleeding. Do not try to start until all air is out, and bleed screw is closed. If you can't find bleed screw, just loosen the inlet fuel line at the injection pump. That fills the entire system.
Do you get the air out?