Like others said, the carb can only work as well as the rest of the engine works.
True flooding is when the needle valve fails to shut off the fuel when the bowl is full. It will sit and drip gas with the fuel valve on and not running. (Not to be confused with dripping a few drops following a failed start.)
Flooding can be caused by several factors, but a freshly rebuilt carb that floods is usually caused by trash in the needle/seat. It only takes a tiny speck if rust or trash to hold the valve open. If the tank is flaking rust or contaminated, flooding will be an ongoing problem. Be sure the sediment bowl is clean and the screen is in place. Some add an inline filter, but if you do be sure it is a screen type, not pleated paper as they are too restrictive for gravity flow. When connecting the fuel line, I like to open the tank valve and let the line flush before connecting.
Sometimes a dirty needle/seat can be flushed by draining the carb and letting it refill.
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Today's Featured Article - When Push Comes to Shove - by Dave Patterson. When I was a “kid” (still am to a deree) about two I guess, my parents couldn’t find me one day. They were horrified (we lived by the railroad), my mother thought the worst: "He’s been run over by a train, he’s gone forever!" Where did they find me? Perched up on the seat of the tractor. I’d probably plowed about 3000 acres (in my head anyway) by the time they found me. This is where my love for tractors started and has only gotten worse in my tender 50 yrs on this “green planet”. I’m par
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