Carburetor and automatic choke assembly for an engine

A carburetor configured for use with an internal combustion engine, the carburetor comprising:

• a body defining a passageway therein;
• a throttle lever including a cam surface;
• a throttle valve positioned in the passageway and responsive to movement of the throttle lever, the throttle lever configured to rotate about a first axis from a wide-open first position to a second position at least 50 degrees from the first position;
• a choke lever including a follower surface configured to being engaged by the cam surface;
• and
• a choke valve positioned in the passageway and responsive to movement of the choke lever;
• wherein one of the cam surface and the follower surface includes an arcuate segment having a constant radius centered on a second axis, wherein the second axis is axially aligned with the first axis, and wherein the arcuate segment is sufficiently long such that the throttle valve is configured to move at least 15 degrees while the other of the cam surface and the follower surface engages the arcuate segment.