The complete site map for Model-A.org.
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Model-A.org
Problem Solving
The Problem Solving area provides a wealth of information that will help beginners or master mechanics isolate and solve carburetor related problems. Guidance is provided to investigate symptoms and point to likely causes. Data is available on each components design, its variations, and its common defects. To make repair and restoration tasks easier, information on special tools is provided.
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Symptoms
- Symptoms and Causes
- Gas Leaks from Carburetor
- Engine won"t idle smoothly at 350 to 450 RPM.
- Problems when driving 5-35 MPH
- Problems when driving over 30 to 35 MPH
- Engine dies when vehicle comes to a stop
- Low mileage / Sooty plugs / Mixture rich / Smell gas
- Mixture lean and over heating
- Back fires at high speeds
- Miss and jerks on hard pulls at low speeds
- Opening GAV does not provide extra fuel at low speeds
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Components
- Component Details
- Complete List of Component Details
- Main Jet
- Cap Jet
- Compensator Jet
- Secondary Well
- Idle Jet
- Castings
- Upper Casting Passages
- Lower Casting Passages
- Casting Threads
- Throttle Assembly
- Idle Air Adjustment Needle Valve
- Gas Adjusting Valve (GAV) and Seat
- Choke Arm and GAV Driver
- Float Valve and Float
- Gaskets
- Venturi
- Filter Strainer
- Drain Plug
- Main Bolt
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Special Tools
- Special Tools
- Complete List of Special Tools
- Dremel Stone #911
- Drilled Out 9/32 Nut Driver
- Fiber Optic Light
- Float Tester
- Fuel Level Sight Tube
- Gas Adjusting Valve Seat Honing Tool & Guide
- Gas Adjusting Valve Wrench
- Heli-Coil Thread Repair Kits
- Jet Flow Testing Setup
- Small Drill Sets
- Throttle Shaft Bushing Drill Fixture Plate
- Venturi Extraction Tool
- Choke Driver with Wing Nut
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Problem Solving
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Troubleshooting Chart
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Flow Diagram
Procedures
The Procedures area documents how to perform many of the tasks required to repair or restore the carburetor.
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Procedures
- Procedures
- Complete List of Procedures
- Starting Procedure
- Shut Down Procedure
- Carburetor Idle RPM and Idle Air Mixture Adjustment
- Using Carburetor to Check Engine Timing
- Adjusting Engine Timing
- Removing Carburetor From Vehicle
- Disassembly of a Zenith Model A Ford Carburetor
- Installing Heli-Coils
- Lower Carburetor Casting Assembly
- Upper Carburetor Casting Assembly
- Installing Carburetor Onto Engine
- Testing Newly Installed Carburetor
- Removing and Replacing Brass Passage Plugs
- Repairing Destroyed Tapped Holes in Casting for Jets
Restoration Services For Sale
The Restoration Services For Sale area provides alternatives to obtain good carburetors for people that do not have the time, skill, or inclination to work on their own carburetors.
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For Sale
More Information
The More Information area is available for those that want to learn about carburetor theory, who manufactured them, and how the design evolved. Guidance is provided on what to look for at swap meets, when you are looking for a Zenith, Model A carburetor to restore or to use as a trade-in.
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Resources
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Book Resources
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Club Links
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Message Boards
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Technical Resources
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Videos
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Basic Info
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Other Carburetors
- Other Carburetors
- Other Carburetors Full List
- Model B Carburetor
- Allstate: Model 2405
- Borg-Warner
- Carter Manufacturing Company
- GAZ
- Genuine Antique Parts
- Johnson, Model JFA
- Kayce
- KTK
- Marvel Carburetor Company
- Marvel-Schebler
- Mochi
- MotorCraft
- Rayfield R-I-F
- Sears, Roebuck & Company
- Simmons
- Tillotson: Models F-1B, X, and XF
- Tokyo Carburetor Company
- Western Auto
- Wheeler-Schebler Carburetor Company
- Wizard: Model L131 and L130
- Zenith: Models 2405N, 2415N Hybrid, 548, and Series 68
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"Swap Meet" Carburetors
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Seminars