It won't pull fuel when you choke it and hand flip it unless the carb is really completely closed off. If the choke has a hole in it, as many do for starting with the pull start, you have to close it off, or use your finger.

Using your finger, make sure you have the carb securely closed off airtight, throttle wide open, and after several flips the fuel line should be full. When your finger gets a little wet, its ready to start. I usually take the choke out of the carb to improve airflow. I sometimes make a flat plat that pivots over the carb opening like a choke. Sometimes this plate, though it looks like it is securely covering the carb, will not seal well and I will have to put pressure on it to get a good choke. I've pretty much abandoned using these little plates, and just use my finger now.

Good luck,
AV8TOR