[AirSpeed]

Originally Posted by slikside

And what you have is called a "divorced choke". I think implying that it is separate and apart from your carb, as opposed to an electric one which is well, electric for one, but is mounted integrally with the carb. That's my understanding anyway.

But I have the same divorced choke. When you first press your gas pedal to set the choke for a cold start, of course the choke plate should close, but that fast idle cam (FIC) should be raised to full up. The underside of that FIC is where the action takes place. At this point all that linkage places the choke plate, FIC, and throttle linkage in the proper position for a cold start.

When the motor fires, the primary throttle shaft is held open, at just the right point for a "fast idle" by the FIC. When you tap the gas peddle to "step down" the idle, what you are doing is moving that underside of the FIC to the next "step' down. The front part of that cam that is easiest to see drops down a notch when that happens. I think there are at least 3 "steps" on the FIC.

I used to have a bunch of pic of that stuff when I rebuilt my carb, but must have deleted them after the job was done.

Any how, that's a quick once over of how that set up works. I remember it being an intricate set up, and that's why I took those photos as I was taking it apart.

Oh, there is ANOTHER cam with an arm that should be under the arm of the FIC. That is how the FIC gets raised into position when you set the choke.

Thanks, I'll check it out this afternoon if it doesn't start snowing!