Take a clean rag and stuff it into the tank - it will soak up the water.
Directly into the carburetor throat (remove air cleaner).
you tube how to clean a mower carburator.
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If your lawn mower is pulsating, it may mean that it is not getting enough fuel and the carburetor may need cleaning.
A bad, stuck or dirty float needle inside the carburetor.
They are for the fuel solenoid shutoff
You will need to remove and clean the gas tank and the carburetor. Then replace the gas lines and filter.
Carburetor float is stuck open.
It is not fuel injected so yes it has a carburettor
No, it is not necessary to remove it. You can charge it right there on the mower.
There will be an inline filter on the fuel supply line from the tank to the carburetor
Dirty or stuck open needle valve in carburetor.