It appears to be an automatic choke. It would be adjusted on the end not in the picture. Even cold it will sit as shown until the accelerator is pumped once to allow it to close.


"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.