Skip to main content...

Model-A.org

The Place for Model-A Ford Carburetors

Problems when driving 5-35 MPH

  • Gas Adjusting Valve is open too much or seat is not honed to let needle seal.
  • Lower Casting Bowl Passage is restricted to Secondary Well via GAV Seat Hole.
  • Compensator Jet Orifice contains dirt or rust, or is too small.
  • Compensator Jet Orifice is too large.
  • Gas Adjusting Valve Brass Seat is missing from carburetors built through 1929.
  • Lower Casting Comp. Jet Passage is restricted to Cap Jet via Secondary Well.

ˆ Top of Page  •  Lower Casting Passages  •  Compensator Jet  •  Gas Adjusting Valve (GAV) and Seat  •  Gas Adjusting Valve Seat Honing Tool & Guide