Model A & AF

Ford Garage

Zenith Carburetor Component Sizes

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Model A
Configuration and Date
Main
Venturi
Secondary
Venturi
Main
Jet
Comp
Jet
Cap
Jet
Idle
Jet
Jan 1928, US SB p209
Feb 1928, UK SB p127
24 10 20
 16 
18 19 10
Mar 1928, UK SB p138 24 10 20 18 19 10
Sep 1928, US SB p280
Nov 1928, UK SB p226
18.5 Throttle Plate was 20
27/32 n/a 19.5 19 21 11
Mar 1930, US SB p443
Jun 1930, UK SB p288
27/32 n/a 20 19 20 11
Typical Model A .866 n/a Marked '20' Marked '19' Marked '20' Marked '11'
Model AF (small bore)
Configuration and Date
Main
Venturi
Secondary
Venturi
Main
Jet
Comp
Jet
Cap
Jet
Idle
Jet
Feb 1928, UK SB p127 21 9 16 16 17 9
Mar 1928, UK SB p138 20 10 17 16 16 10
Nov 1928, UK SB p226 18 n/a 16 17 16 11
Jun 1930, UK SB p288 18 n/a 16 17 16 11

From the table above, it can readily be seen that the primary differences between the Model A and Model AF are


More Zenith carburetor information on Ford Garage:

  1. Model A Zenith Carburetor Theory of Operation
  2. Model A & B Zenith Carburetor Jet Sizes & Flow Rates
  3. Model A Zenith Carburetor Numbering
  4. Model A Zenith Carburetor A-9545 Secondary Well Variations
  5. Model A Zenith Carburetor Float Weights
  6. Model A Zenith Carburetor GAV Wrench
  7. For more Model A & B Zenith carburetor web pages, use the Site Search box at the top or bottom of this web page.

April 2017