Air is fine, fuel is required, but air is often there as well
Any inline fuel filter will work.
It should be an inline fuel filter. Just remove it and install a new one. Once you find it you will see how it is held in place.
You do not clean it, you replace it with a new one.
Some did, others did not.
How often should you change the fuel filter?
The position of the fuel filter depends on what type of fuel tank to carburetor system your mower uses. If the carburetor is mounted directly on the tank, the filter is located within the tank at the end of the carburetor pickup line. If the carburetor is mounted separate from the tank, the filter is usually on the fuel line somewhere between the tank and the carburetor.
Check the air filter, fuel filter. Either of these easily blocks on mower.
AFTER.
You should never had to "bleed" a fuel filter. Any air in the fuel line should come out as the fuel pump pushes fuel through the line and filter to the carburetor. There will always be some air or open space in the filter.
Check the air filter, fuel filter. Either of these easily blocks on mower.
either in the fuel tank or on the fuel line, may look like a round plastic thing,
it may not have one. If it does it will be located on the fuel line between the fuel tank and the carburetor.