Stihl 4140 · Section K · 10 of 15 · 37 parts
Carburetor C1Q-S66 (36.2002)
Fits FC 55.
Parts (37)
| Pos | Part number | Description | Qty |
|---|---|---|---|
| 1 | 4137 120 7100 | Throttle shaft with lever | 1 |
| 2 | 1123 122 3000 | Spring | 1 |
| 3 | 4137 121 8900 | Pin → replaced by 4128 121 8900 TI 41/1997 | 1 |
| 4 | 4137 121 8600 | Washer | 1 |
| 5 | 1120 122 9000 | E-clip | 1 |
| 6 | 4140 121 3302 NLA | Throttle shutter | 1 |
| 7 | 1125 122 7403 | Round head screw | 1 |
| 8 | 1125 122 9001 | E-clip | 1 |
| 9 | 1129 121 4800 | Pump diaphragm | 1 |
| 10 | 1123 129 0905 | Gasket | 1 |
| 11 | 1123 121 0800 | End cover | 1 |
| 12 | 1120 122 7800 | Oval head screw | 1 |
| 13 | 4116 121 5100 | Inlet needle | 1 |
| 14 | 1120 122 3004 | Spring | 1 |
| 15 | 1125 121 5000 | Inlet control lever | 1 |
| 16 | 1120 121 9200 | Spindle | 1 |
| 17 | 1120 122 6600 | Collar screw | 1 |
| 18 | 1129 129 0900 | Gasket → replaced by 4134 121 4700 TI 16/2009 | 1 |
| 19 | 4129 121 4700 | Metering diaphragm | 1 |
| 20 | not sold separately | Flange not available as a separate item | 1 |
| 21 | 4226 122 7100 | Screw | 4 |
| 22 | 4229 122 6700 | High speed adjustment screw | 1 |
| 23 | 4229 122 6800 | Low speed adjustment screw | 1 |
| 24 | 1123 121 7800 | Strainer | 1 |
| 25 | 4140 121 0800 | End cover | 1 |
| 26 | 4226 121 2700 | Cap | 1 |
| 27 | 4229 122 6200 | Idle speed adjustment screw | 1 |
| 28 | 1125 122 4200 | Clamp | 1 |
| 29 | 4229 121 2700 | Cap | 1 |
| 30 | 4229 121 5603 | Fixed jet 0.37 | 1 |
| 31 | 4229 121 5800 | Pump piston | 1 |
| 32 | 4140 122 3600 | Sealing ring → replaced by 4314 122 3600 TI 20/2008 | 1 |
| 33 | 4229 122 3001 | Spring | 1 |
| 34 | 1120 121 7801 | Strainer | 1 |
| Not numbered on the diagram — assemblies, kits and options | |||
| — | 4140 120 0603 NLA | Carburetor C1Q-S66 → replaced by 4140 120 0606 TI 36/2002 | 1 |
| — | 4140 007 1060 | Set of carburetor parts | 1 |
| — | 1129 007 1062 | Set of carburetor parts → replaced by 4128 007 1060, 4128 007 1060 TI 6/2009 | 1 |
2012 service parts catalogue. Parts are not interchangeable across engine series — check yours before ordering. NLA = withdrawn by STIHL before 2012.
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