The site index for Model-A.org.

• Adjusting Engine Timing
• Air Filter is Restricting Air Flow.
• Allstate: Model 2405
• Assembling Carburetors
• Back fires at high speeds
• Basic Info
• Borg-Warner
• Cap Jet
• Carburetor Idle RPM and Idle Air Mixture Adjustment
• Carburetor Removal and Disassembly
• Carburetors and Carbohydrates
• Carter Manufacturing Company
• Castings
• Casting Threads
• Choke Arm and GAV Driver
• Choke Driver with Wing Nut
• Cleaning Carburetor
• Cleaning minor dirt, rust particles or sludge out of Carburetor.
• Compensator Jet
• Compensator Jet Orfice contains dirt or rust, or is too small.
• Compensator Jet Orfice is too large.
• Complete List of Component Details
• Complete List of Procedures
• Complete List of Special Tools
• Component Details
• Contact Us
• Controls and Adjustments
• Costs
• Defects To Look For
• Delivery
• Details To Look For
• Disassembly of a Zenith Model A Ford Carburetor
• Drain Plug
• Dremel Stone #911
• Drilled Out 9/32 Nut Driver
• Engine dies when vehicle comes to a stop
• Engine won"t idle smoothly at 350 to 450 RPM.
• False Carburetor Symptoms
• Fiber Optic Light
• Filtering Air
• Filter Strainer
• Float is set too high or a Pin hole absorbs gasoline into float.
• Float is set too low.
• Float Tester
• Float Valve and Float
• Float Valve does not seat properly due to Dirt, Rust or Material Failure.
• Flow Diagram
• Fuel Level Sight Tube
• Fuel Supply Must Be Clean
• Gas Adjusting Valve (GAV) and Seat
• Gas Adjusting Valve Brass Seat is Missing from Carburetors built through 1929.
• Gas Adjusting Valve is open too much or Seat is not honed to let needle seal.
• Gas Adjusting Valve Seat Honing Tool & Guide
• Gas Adjusting Valve Seat is Blocked with dirt or rust.
• Gas Adjusting Valve Wrench
• Gasket at Main Jet is too thick or multiples are used, resulting in tip being too low.
• Gaskets
• Gaskets are not sealing properly.
• Gas Leaks from Carburetor
• GAZ
• General Carb Description
• Genuine Antique Parts
• Heli-Coil Thread Repair Kits
• Home
• How the carburetor basically works
• How the Carburetor Design Evolved
• Idle Air Adjustment Needle Valve
• Idle Air Adjust Screw is Mis-adjusted or too short, collapsing spring before it seats.
• Idle Jet
• Idling Jet Orfice contains dirt or rust, or is too small.
• Idling Jet Orfice is too large.
• Installing Carburetor Onto Engine
• Installing Heli-Coils
• Jet Flow Testing Setup
• Jim Mason's Model A Page
• Johnson, Model JFA
• Kayce
• KTK
• Loose fuel line fitting, drain plug, filter strainer, GAV, Passage plugs, etc..
• Lower Carburetor Casting Assembly
• Lower Casting Bowl Passage is Restricted to Main Jet & Drain Plug.
• Lower Casting Bowl Passage is Restricted to Secondary Well via GAV Seat Hole.
• Lower Casting Comp. Jet Passage is Restricted to Cap Jet via Secondary Well.
• Lower Casting Passages
• Low mileage / Sooty plugs / Mixture rich / Smell gas
• MAFCA, MARC and Skinned Knuckles Model A Technical
• MAFCA Question and Answers
• Main Bolt
• Main Jet
• Main Jet or Cap Jet Tips is not "dished" / "indented".
• Main Jet Orfice contains dirt or rust, or is too small.
• Marvel Carburetor Company
• Marvel-Schebler
• Miss and jerks on hard pulls at low speeds
• Mixture lean and over heating
• Mochi
• Model A, Zenith Carburetor Photos
• Model A Ford Barnyard
• Model A Ford Club of America
• Model A Ford Club of Colorado
• Model A Ford Forum
• Model A Ford Judging Standards & Restoration Guidelines
• Model A Ford Mechanics Handbook
• Model A Message Board at Ahooga
• Model A Message Board at Fordbarn
• Model A Restorers Club
• Model B Carburetor
• More Information
• More Photo Links
• MotorCraft
• Needs Restoration
• Negotiating Leverage
• Opening GAV does not provide extra fuel at low speeds
• Order Form
• Other Carburetors
• Privacy Statement
• Problem Solving
• Problems when driving 5-35 MPH
• Problems when driving over 30 to 35 MPH
• Procedures
• Purchase a Restored, Zenith Model A Carburetor
• Rayfield R-I-F
• Rebuilding The Model "A" Engine
• Removing Carburetor From Vehicle
• Resources
• Restoration Services For Sale
• Restore Cost Drivers
• Restoring The Model 'A' and 'B' Carburetors - The 'Rex' Reheis Way
• Safety First!
• Santa Clara Valley Chapter
• Sears, Roebuck & Company
• Secondary Well
• Shut Down Procedure
• Simmons
• Site Map
• Small Drill Sets
• Special Needs
• Special Tools
• Starting Procedure
• Swap Meet Carburetors
• Symptoms and Causes
• Terms of Service
• Testing Newly Installed Carburetor
• Testing the Model A Ford Engine
• The Model A Ford Carburetor
• Throttle Assembly
• Throttle Idle Adjust Screw is Mis-adjusted.
• Throttle Shaft Bushing Drill Fixture Plate
• Tillotson: Models F-1B, X, and XF
• Tokyo Carburetor Company
• Trade-in, Zenith carburetors Are Requested
• Transportation
• Troubleshooting Chart
• Upper Carburetor Casting Assembly
• Upper Casting Air Adjust screw Passage is Restricted to Vent hole.
• Upper Casting Fuel Line Passage is restricted to Float Valve via Strainer.
• Upper Casting Idle Jet Passage is restricted to Idle throat port.
• Upper Casting Passages
• Using Carburetor to Check Engine Timing
• Vacuum leaks at Manifold gaskets, wiper line, or Throttle shaft.
• Venturi
• Venturi Extraction Tool
• Welcome
• Western Auto
• Wheeler-Schebler Carburetor Company
• Who manufactured this carburetor?
• Wizard: Model L131 and L130
• Your Carburetor Restored or Repaired
• Zenith, Model A Ford Carburetor Description
• Zenith: Models 2405N, 2415N Hybrid, 548, and Series 68
• Zenith Mileage Tester
• Zenith Model 'A' Carburetor Restoration Guidelines
• Zenith Seminar - 2002