STIHL Parts & Spec Guide Unofficial
← HS 81 R, HS 81 RC, HS 81 T, HS 81 TC, HS 86 R, HS 86 T

Stihl 4237 · Section G · 7 of 14 · 29 parts

Carburetor C1Q-S198, C1Q-S140B

Fits HS 81 R, HS 81 RC, HS 81 T, HS 81 TC, HS 86 R, HS 86 T.

Position —

Go to table row → Where else is this used →
1101112131415161718192202122232425263456789
Tap a numbered callout to jump to that part. Scroll or pinch to zoom.

Parts (29)

PosPart numberDescriptionQty
1 1123 122 3001 Spring 1
2 4116 121 5100 Inlet needle 1
3 1125 121 5000 Inlet control lever 1
4 1120 121 9200 Spindle 1
5 1120 122 6600 Collar screw 1
6 4229 129 0901 Gasket 1
7 4180 121 4700 Metering diaphragm 1
8 4237 120 2201 Flange 1
9 4226 121 2700 Cap 1
10 4140 121 0800 End cover 1
11 4140 122 7100 Screw 4
12 1123 121 7800 Strainer 1
13 1129 121 4800 Pump diaphragm 1
14 1123 129 0905 Gasket 1
15 1123 121 0800 End cover 1
16 1125 122 4200 Clamp 1
17 4140 122 6200 Idle speed adjustment screw 1
18 1120 122 7800 Oval head screw 1
19 4128 121 8901 Pin 1
20 4137 121 8600 Washer 1
21 1120 122 9000 E-clip 1
22 4237 122 6801 Low speed adjustment screw 1
23 4229 122 6702 High speed adjustment screw 1
24 4229 121 2701 Cap 1
25 4237 182 9500 Choke knob 1
26 4229 121 5603 Fixed jet 0.37 1
Not numbered on the diagram — assemblies, kits and options
— 4237 120 0611 Carburetor C1Q-S198 1
— 4237 120 0606 Carburetor C1Q-S140B 1
— 4229 007 1060 Set of carburetor parts 1

2012 service parts catalogue. Parts are not interchangeable across engine series — check yours before ordering.

Wrong number or missing part for the HS 81 R, HS 81 RC, HS 81 T, HS 81 TC, HS 86 R, HS 86 T? Report a correction →