The Choke Pull-Off, or Choke Break, is vacuum-operated and designed to open the choke plate slightly after a cold engine start to prevent engine flooding.
Symptoms of Choke Pull-Off failure may include:
Engine flooding
Poor fuel economy
Rich exhaust when engine is cold
Manufacturers often recommend a vacuum check for proper operation or replacing whenever the carburetor is serviced.
Attention California Customers - WARNING: This product can expose you to chemicals, including lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm. www.p65warnings.ca.gov