Mazda choke

ok guys, need a lil help. my truck runs purrrfect except when I start it with the choke operating it runs up to like 3000-3200 RPM..... I have a feeling this isn't great for a cold motor, carbs and chokes aren't my thing, can someone tell me how to adjust the choke idle speed.... if it's possible?

it is adjustable

it is sort of hard to see where the screw is...stand right beside the passenger side fender , hold the throttle linkages and rotate it as if you are stepping on the gas. as you rotate it almost to full throttle, you will see a screw come up right beside the carb. that is the screw, ill see if i can take a pic of it

sweet!..... my truck (Jennie) thanks you very much. I doubt I would've ever found that screw..... now the q is what is the fast idle supposed to be?.... I have it about 1500-1800