Zenith Carb Butterflies

brettsul

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I have a 2800cs with Zenith carbs.
Are the 2nd stage butterflies purely for cold start and remain open once engine gets to temperature? If I press on them they close to different levels on each carb...
Thanks for any info.
 

Stevehose

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choke flaps should shut almost all the way when you press the pedal to the floor on a cold engine. Once warmed up they open up from the electric and coolant bimetallic springs. They should be closed the same amount and open all the way at about the same time once warm.
 
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