Anyone Using a Factory or Add-on Manual Choke?

toolmanmike said

A properly working automatic choke can be kicked off fast idle at any time. A couple seconds after the engine starts. The choke going closed moves the fast idle cam and gravity kicks it off when you tap the gas pedal. The fast idle cam must be clean and move freely.

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That is not true, or at least not for all carbs in general. The choke thermostat determines where the choke "is" in the warmup cycle. What I mean is, "kicking" some types might get them off fast idle but as soon as you stop that and open it slow, the thermostat will try to close the choke back up against the pull off. Otherwise, if you "kick" it clear open, it won't run when that cold. Not only will the choke be open, but the low idle setting won't be fast enough to overcome the cold/ lean mixture

Bear in mind that depending on the carb there can be more than one fast idle. There an be one or two "intermediate" idle below fastest, before it gets to hot/ curb idle.