Ed, try something for me. Turn you mixture screw in one turn and see what happens...you may be leaned out too much.
....if no change there...sounds like you may have an air leak Ed. Running OK with choke and then bogs down and dies when choke pushed in. I'd check the bolts securing to the manifold also and see how it runs. If that doesn't solve it and you have to take the carb off you may as well pull it apart and blow out the jets and check gaskets
I started mine again today and put water through also....ran it for 1/2 hour however, it started to bog down about 5 minutes in...then came back steady on it's own...I figured she burned a bit of gasline antifreeze and water...all good after that. Doesn`t take much to foul and good working fuel delivery system.