Zenith INAT Type 2-Barrel: Overhaul
Removal of carburetor is not necessary for minor overhaul and cleaning. Proceed as follows for on car overhaul. Remove center air cleaner stud, attaching bolts loosen tie rod lock screw and lift off carburetor cover. Remove idle jet and remove mixture block. Clean main jets (1), pump intake valve (2), pump pressure (3), and float chamber. Remove and clean air compensating jets (4), choke tubes (5), and accelerator pump piston. Air compensating jets and choke tubes, due to their different size, must go back exactly as removed. To replace entire choke housing, drain cooling system, remove sealing washer, pull off cables and water hoses and remove choke housing. When replacing choke housing be sure to line up notch on housing with notch on carburetor.
Courtesy of NOT AVAILABLE
Courtesy of NOT AVAILABLE CARBURETOR SPECIFICATIONS
| Application |
Specification |
| Idle |
900-950 RPM |
| Fast Idle |
1800-2000 RPM |
| CO Level |
1-1.5% |
| Float Level Setting |
|
| Float Valve Gasket |
.04" (1.0 mm) |
| Float Weight |
.3 oz. (8.5 g) |
| Choke |
Index |
| |
Butterfly Opening |
.118" (3 mm) |
| |
Heater Filament |
14.6V/.45A |
| Thermo Start Valve |
20 ohm |
| Idling Cutoff Valve |
.13A/12V |
| Primary Circuit |
| |
Main Jet |
x115 |
| |
Air Correction Jet |
80 |
| |
Venturi |
24 |
| |
Mixture Tube |
6s |
| Secondary Circuit |
| |
Main Jet |
x140 |
| |
Air Correction Jet |
100 |
| |
Venturi |
30 |
| |
Mixture Tube |
4n |
| Idling Jet |
42.5 |
| Fuel Jet Thermo Start Valve |
60 |
| Accelerator Pump |
Piston |
| |
Volume Injected Per Stroke |
.6-.9 cc |