[Mike_U]

Welcome to the forum. Lots of things could have happened when you ran out of gas. Any of the fuel lines could have gotten plugged or depending on the type of fuel filter, debris could have flowed into the carburetor it could still be plugged even though you cleaned it.

Is there a fuel filter in the fuel line? Some filters are nothing more than a screen that can let lots of garbage through and some filters are paper filters with very small openings. Always use the best fuel filter you can.

Why did you change the fuel pump and what type is it, vacuum operated or electric? Did you test fuel flow after you changed the pump?

When you cleaned the carb, did you remove the bolt on the lower left side (looking from rear of tractor) and remove the high idle jet located in the bottom of the fuel bowl?

How about when you removed the top of the carb, did you make sure all the holes in the long pickup tube attached to the top of the carb are clean?

 

[Mike_U]

It's possible the once clean carb could have gotten plugged by debris from the bottom of a fuel tank when you ran out of fuel or maybe there is water in the carb now if there was water in the tank.

How much fuel is in the tank now?

Did you try the fuel valve on the left side of tractor? There are two pickup lines in the fuel tank, Main and Reserve. Maybe one line is plugged or maybe one of the pickup tubes fell off in the tank and now it is hard for the fuel pump to pull fuel from the tank. One line is a reserve line and it is set deeper in the tank in case you run out of fuel using the main fuel pickup line.

The vacuum line from the engine to the fuel pump sometimes gets brittle and leaks or does not make a tight seal on the fuel pump How did it look when you replaced the pump? If it is bad, the fuel pump will be weak.

Check for good fuel flow coming out of the pump and we can go from there.

Was the fuel filter changed after you ran out of gas? Maybe everything is OK but the filter is plugged.