F-Head Carburetor Question

I've got the stock F-Head carburetor, the Carter 938SD, and I had a question for those of you who use it. When you start the engine, do you need to use the choke and do you press down on the accelerator? I have found that if I use the choke and press down on the accelerator, I can crank and crank and it will not start. As soon as I let off on the accelerator so the throttle plate closes, boom, it starts right up. In fact I can start it without touching the accelerator, I just barely crank it and it starts right up, idling nicely.
I recently rebuilt the carburetor, it acted like this before and after the rebuild. I also rebuilt the engine, and it acted the same before and after the rebuild. I also have a spare carburetor, and it acts the same way. It acts the same whether the air cleaner is off or on, and I have plugged the pcv port on the intake maniford and it did not change the behavior either. I rechecked the float level, and the float isn't full of fuel.
The engine accelerates and runs just fine, I'm just puzzled that it won't start unless the throttle is closed.
I sprayed around the carb with WD-40 and didn't detect any air leaks, the accelerator pump appears to be working, I see a spray of fuel when I push on the accelerator. This is at about sea level and about 70 degrees outside.

Any ideas? Does any one else's act this way?

Thanks,

Eric

 

Sounds like it's working perfectly.

 

Thank you for the feedback.

 

Set your choke where you need it when cold, step on the gas once all the way down (which should also set the fast idle cam) and then put your gas foot on the brake pedal. Start it. Doing it this way will help in keeping you from flooding the engine.

 

Just a small follow up on this.
It turns out that the problem wasn't that the engine wasn't starting up when I let off on the throttle, but when I was letting go of the key as I returned it from the "start" position. When I originally got this jeep, the PO didn't have a starter key switch, he had jury rigged a push button for the starter, and a flip switch for the ignition. I replaced it with a starter key switch combo. When I did so, I transferred all the wiring to the "ACC" position instead of the "IGN" position (not sure why I did that). Anyway, what that did was power up the ignition for all EXCEPT the time when the starter was turning. When I let off on the throttle (and key), the ignition fired right up and the engine started. Dumb user error on my part. I swapped the wiring from ACC to IGN and it starts right up, regardless of the throttle position. Doh!