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Model-A.org

The Place for Model-A Ford Carburetors

Mixture lean and over heating

  • Float is set too low.
  • Lower Casting Bowl Passage is restricted to Main Jet & Drain Plug.
  • Compensator Jet Orifice contains dirt or rust, or is too small.
  • Gasket at Main Jet is too thick or multiples are used, resulting in tip being too low.
  • Main Jet Orifice contains dirt or rust, or is too small.
  • Upper Casting Fuel Line Passage is restricted to Float Valve via Filter Strainer.
  • Lower Casting Comp. Jet Passage is restricted to Cap Jet via Secondary Well.

ˆ Top of Page  •  Float Valve and Float  •  Lower Casting Passages  •  Main Jet  •  Compensator Jet  •  Upper Casting Passages