Charon
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In warm weather I usually make a first attempt at starting without the enricher. If it doesn't fire right away I use the enricher. After the first start of the day I normally don't need the enricher again, unless the weather is chilly.
As mentioned earlier, it is an "enricher", not a "choke". The enricher only works when the throttle is at idle, because it depends on manifold vacuum to pull in the extra fuel through a dedicated passage. An opened throttle reduces manifold vacuum. The choke is usually a flap or butterfly fitted between the air filter and the carburetor, which restricts airflow to the whole carburetor. That restricted airflow effectively subjects the whole carburetor to manifold vacuum, and pulls the extra fuel through the idle or main jets instead of a special "enriching" passage.
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