Carburetor number 2939S. 2618S along with a .082 jet was used as a replacement so you might see either carburetor.
Idle vacuum - 18 inches.
Flange - 1 3/4", 3 bolt pattern.
Vented using an inside balance tube to air horn ahead of the choke valve.
Idle adjustment - 1/4 - 1 3/4 turns open. For richer mixture, turn screw out. Idle speed should be above 500 rpm in neutral.
Intake ball check in diaphragm housing - .115- .120" diameter.
Choke - set on index.
Main jet - .082"
With gasket removed, bowl cover inverted and float resting on pin in seated needle, the distance from the bowl cover to the top of float should be 9/16". Do not depress float lip against spring loaded pin in needle, but let float rest on its own weight. Adjust by bending float lever.
With bowl cover assembly held in upright position, the distance between bottom of float (at free end) and bowl cover should be 2 1/8". Adjust by bending stop tab on float arm.
| 1-1027S | Body flange assembly | 63-178 | Diaphragm spring retainer |
|---|---|---|---|
| 1A-78 | Fange gasket | 75-1338 | Metering rod standard .050" x .039" |
| 2-134 | Throttle valve | 100-16 | Throttle lever adjusting screw |
| 3-749S | Throttle shaft and lever assembly | 101-28 | Throttle shaft arm attaching screw |
| 7-107 | Choke valve | 101-136 | Coil housing attaching screw |
| 11B-69 | Rivet plug | 101-149S | Body flange attaching screw and washer assembly |
| 11B-79 | Rivet plug | 101-160S | Bowl cover attaching screw and washer assembly |
| 11B-220 | Rivet plug | 101-282S | Diaphragm housing attaching screw and washer assembly |
| 11B-223 | Rivet plug | 101-284 | Piston housing attaching screw |
| 11B-271 | Idle port rivet plug | 111-59S | Metering rod arm assembly |
| 14-433S | Choke piston lever, link and shaft assembly | 114-84S | Throttle shaft arm assembly |
| 15-35S | Strainer nut assembly | 115-165 | Choke connector rod |
| 17-51 | Pump check needle | 116-13 | Pump intake check ball |
| 20-22 | Needle seat gasket | 117-146 | Pump lifter link |
| 20-35 | Bowl strainer gasket | 117-148 | Fast idle link |
| 20-43 | Piston housing gasket | 117-154 | Throttle shaft arm connector link |
| 21-128S | Float and lever assembly | 120-158 | Metering rod jet .082" |
| 24-27 | Float lever pin | 121-185 | Coil housing gasket |
| 25-273S | Needle pin, spring and seat assembly | 121-209 | Body flange gasket |
| 30-14 | Bowl strainer gauze | 121-278 | Body gasket |
| 30A-44 | Idle adjustment screw | 146-241S | Bowl cover and strainer assembly |
| 39-10 | Choke valve attaching screw | 150-170 | Choke piston pin |
| 39-11 | Throttle valve attaching screw | 150A-10 | Pin spring |
| 47-14 | Welsh plug | 160-123 | Choke piston |
| 61-242 | Metering rod spring | 170-253S | Piston housing and plug assembly |
| 61-291 | Throttle lever adjusting screw spring | 170-274S | Pump discharge housing assembly |
| 61-389 | Pump discharge spring | 170AK-250S | Thermostatic coil and housing assembly |
| 61-390 | Upper pump spring | 172-24 | Choke connector rod retainer |
| 61-426 | Idle adjustment screw spring | 186-24 | Coil housing baffle plate |
| 63-58 | Coil housing retainer | 186-54 | Fuel bowl baffle plate |
| 63-104 | Throttle shaft retaining ring | 203-53S | Pump discharge assembly |
| 63-135 | Upper pump spring retainer |