STIHL Parts & Spec Guide Unofficial
← 024 · 026 · MS 260 · MS 240

Stihl 1121 · Section O · 14 of 17 · 38 parts

Carburetor WT-403B, WT-493A

Fits 026.

Position —

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Parts (38)

PosPart numberDescriptionQty
1 1121 121 0810 End cover 1
2 1121 122 7101 Screw 4
3 1120 121 5600 Fixed jet 0.56 1
4 1113 121 4705 Metering diaphragm 1
5 1120 129 0900 Gasket 1
6 4116 121 5100 Inlet needle 1
7 1114 122 3005 Spring 1
8 1113 121 5000 Inlet control lever 1
9 1113 121 9200 Spindle 1
10 1114 122 7400 Round head screw 1
11 4133 120 8600 Non-return valve 1
12 1115 121 5401 Valve jet 1
13 4117 122 9402 Plug 1
14 1114 121 7800 Strainer 1
15 1121 121 4801 Pump diaphragm 1
16 1120 129 0905 Gasket 1
17 1121 121 0805 End cover 1
18 1122 121 7700 Clamp 1
19 1121 122 6205 Idle speed adjustment screw 1
20 1114 122 7100 Screw 1
21 4124 122 3600 Sealing ring 1
22 1111 121 8605 Washer 1
23 1115 122 3002 Spring 1
24 1121 122 6803 Low speed adjustment screw 1
25 not sold separately Plug no longer available from factory 1
26 1113 122 3205 Torsion spring 1
27 1121 120 7105 Throttle shaft with lever 1
28 1117 122 9000 E-clip 1
29 1123 121 3301 Throttle shutter 1
30 1110 122 7400 Round head screw 1
31 1121 121 5602 Fixed jet 0.52 option 1
32 1113 121 0800 End cover 1
33 1106 122 7400 Round head screw 4
34 1130 121 5600 NLA Fixed jet 0.54 1
35 1129 121 5600 Fixed jet 0.50 option 1
Not numbered on the diagram — assemblies, kits and options
— 1121 120 0610 Carburetor WT-403B 1
— 1121 120 0613 Carburetor WT-493A 1
— 1121 007 1062 Set of carburetor parts 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 NLA = withdrawn by STIHL before 2012.

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