Look at how an automatic choke works- - - -it doesn't go wide open as soon as the engine starts. Keeping the choke closed partway for a minute or so will help the engine warm up better, and most carburetors have built-in fast idle linkage connected to the choke.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!