Switch the fuel selector to another tank containing fuel, turn on the electric fuel pump, set the mixture to rich, turn on carburetor heat, check engine gauges, and ensure the primer is locked. If no fuel pressure is indicated, check the tank selector position. If power is restored, turn off the carburetor heat and electric fuel pump. If power is not restored, try different ignition switch settings, throttle and mixture settings, and other fuel tanks if time permits.