Technical Information · issue 43 of 2008
Carburetor; Cover, filter cover, filter housing, spacer flange; Summary
IssueTI 43/2008
Part changes (6)
| Was | Becomes | What the bulletin says |
|---|---|---|
| 4180 120 0604 | 4180 120 0608 | 1 New carburetor C1Q-S131 A (4180 120 0604) will be replaced by the carburetor (4180 120 0608) C1Q-S131A (4180 120 0608). |
| 4180 121 3002 | 4180 121 3003 | 1 Choke shaft screw H: 31/2 turns open The previous choke shaft 4180 121 3002 is Standard setting with limiter caps replaced by the new version 4180 121 3003. |
| 4180 120 7102 | 4180 120 7105 | 2 Throttle shaft with lever Service notes The previous throttle shaft with lever 4180 120 7102 The new choke knob can only be combined with the will be replaced by the version 4180 120 7105. |
| 4180 182 9500 | 4180 182 9502 | 5 Choke knob 1 3 The previous choke knob 4180 182 9500 is replaced by the new version 4180 182 9502. |
| 4180 140 1000 | 4180 140 1003 | 1 Filter housing The previous filter cover 4180 140 1000 is being The previous filter housing 4180 140 2802 will be replaced by the new version 4180 140 1003. |
| 4180 120 2300 | 4180 120 2302 | 2 Spacer flange The previous spacer flange 4180 120 2300 is being replaced by the new version 4180 120 2302. |
Full text
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STIH)
Technical Information 43.2008
Brushcutter STIHL FS 90, 110 – Series 4180
KombiEngine STIHL KM 90, 110 – Series 4180
Edger FC 90, 95, 100, 110 – Series 4180
Pole pruners STIHL HT 100, 101 – Series 4182
Hedge trimmer STIHL HL 90 K, 100, 100 K – Series 4280
Contents
1. Carburetor
2. Cover, filter cover, filter housing, spacer flange
3. Summary
1. Carburetor 1.2 Carburetor adjustment
In the future, the previous carburetor C1Q-S110C 1.2.1 New carburetor C1Q-S131 A
(4180 120 0604) will be replaced by the carburetor (4180 120 0608)
C1Q-S131A (4180 120 0608). The new carburetor
stands out because of a modified accelerator pump, Basic setting without limiter caps
choke shaft and throttle shaft with lever. Low speed screw L: 11/4 turns open
1.1 Spare parts/service note High speed adjustment
The previous carburetor C1Q-S110C screw H: 33/4 turns open
(4180 120 0604) remains available for older Standard setting with limiter caps
machines that are equipped with the previous filter
cover 4180 140 1000 and the previous choke knob Low speed screw L: 3/4 turn open
(4180 182 9500). (max. to stop)
The new carburetor C1Q-S131 (4180 120 0608)
High speed adjustment 3/4 turn open
can only be combined with the new filter cover
screw H: (max. to stop)
4180 140 1003 and the new choke knob
4180 182 9502 (see b 1.5 and b 2.2 ).
TI_43_2008_30_01_01.fm englisch / English USA
)m~ge 2 Technical Information 43.2008
1.2.2 Carburetor C1Q-S110C (4180 120 0604) 1.4 Choke shaft, throttle shaft with lever
Basic setting without limiter caps To improve sealing of the choke shaft and the
throttle shaft with lever, the shaft seals of the
Low speed screw L: 13/16 turns open
carburetor housing are being changed.
High speed adjustment
1.4.1 Choke shaft
screw H: 31/2 turns open
The previous choke shaft 4180 121 3002 is
Standard setting with limiter caps replaced by the new version 4180 121 3003.
Low speed screw L: 3/4 turn open The previous through hole in the carburetor housing
(max. to stop) is being replaced by a blind hole.
High speed adjustment 3/4 turn open
screw H: (max. to stop)
1.3 Pump piston kit, accelerator pump
249TI067 KN
a
Left: previous carburetor housing with through
4 hole (arrow) for previous choke shaft
3
249TI066 KN
2 4180 121 3002
61 Right: new carburetor housing with blind hole for
new choke shaft 4180 121 3003
The previous individual parts of the accelerator
pump (strainer (1), piston (2), sealing ring (3) and
compression spring (4)) will be replaced by the Supply of spare parts
pump piston kit 4180 120 9701.
The previous choke shaft (4180 121 3002) remains
For improved sealing against dirt, the previous available for the carburetor C1Q-S110C.
strainer (1) in the cylinder bore (a) ahead of the
throttle shaft (5) will be replaced by the new cap (6).
Supply of spare parts
The previous individual parts of the accelerator
pump remain available for the previous carburetors.
The new pump piston kit (4180 120 9701) can only
be installed with the new carburetors C1Q-S131
(4180 120 0608).
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Technical Information 43.2008 Page 3
1.4.2 Throttle shaft with lever Service notes
The previous throttle shaft with lever 4180 120 7102 The new choke knob can only be combined with the
will be replaced by the version 4180 120 7105. new filter cover 4180 140 1003. The previous choke
knob can only be combined with the previous filter
cover 4180 140 1000 (see b 2.2).
Supply of spare parts
The previous choke knob (4180 182 9500) remains
available for older machines with the previous filter
cover 4180 140 1000.
2. Cover, filter cover, filter housing,
1 3 2 spacer flange
249TI068 KN
A new cover will be inserted between the filter
housing and spacer flange. The filter cover will be
The new throttle shaft with lever (1) stands out by adapted to the new design.
virtue of a modified seal with sealing ring (2)
4180 122 3601 and washer (3) 4180 121 8601. 2.1 Cover
Supply of spare parts
The previous throttle shaft with lever 4180 120 7102
2
remains available for the carburetor C1Q-S110C.
1.5 Choke knob
1 3
The previous choke knob 4180 182 9500 is
replaced by the new version 4180 182 9502. The
new choke knob stands out by virtue of a larger grip
area.
2
3
249TI073 KN
The new cover (1) 4180 123 0600 will use push
249TI065 KN
nuts (2) 9286 929 0030 and pan head self-tapping
screws (3) 9074 478 3025 for fastening the cover to
the mounts (arrows) on the filter housing and spacer
Left: previous choke knob 4180 182 9500
flange.
Right: new choke knob 4180 182 9502 with
larger grip area
TI_43_2008_30_01_01.fm
)m~ge 4 Technical Information 43.2008
2.2 Filter cover 2.3.1 Filter housing
The previous filter cover 4180 140 1000 is being The previous filter housing 4180 140 2802 will be
replaced by the new version 4180 140 1003. The replaced by the version 4180 140 2805.
new filter cover stands out by virtue of an
intermediate wall in the area of the choke knob and
extended skirting in the area of fuel tank and shroud.
249TI075 KN
249TI074 KN
Left: previous filter housing 4180 140 2802
Right: new filter cover 4180 140 2805 with
mounts (arrow) for the push nuts
Left: previous filter cover 4180 140 1000 9286 929 0030 for fastening the cover
Right: new filter cover 4180 140 1003 with
intermediate wall and extended skirting 2.3.2 Spacer flange
The previous spacer flange 4180 120 2300 is being
replaced by the new version 4180 120 2302.
Spare parts/service note
The previous filter cover 4180 140 1000 remains
available for older machines that are equipped with
the previous choke knob (4180 182 9500).
The new filter cover 4180 140 1003 can only be
combined with the new choke knob
(4180 182 9502) (see b 1.5).
2.3 Filter housing, spacer flange
In the future, the filter housing and spacer flange will 249TI076 KN
be provided with a mount for the push nuts
9286 929 0030 (for fastening the cover).
Left: previous spacer flange 4180 120 2300
Right: new spacer flange 4180 120 2302 with
mounts (arrow) for the push nuts
9286 929 0030 (for fastening the cover)
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Technical Information 43.2008 Page 5
2.4 Spare parts/service note
The new filter housing and the new spacer flange
can also be installed in older machines. In this case,
the mounts for the push nuts do not have any
function. The previous filter housing and the
previous spacer flange are no longer available from
the factory.
3. Summary
Item Part Name Previous New Rem.
1 Carburetor C1QS110C 4180 120 0604 --- 1) 2)
2 Carburetor C1Q-S131A --- 4180 120 0608
3 Choke knob 4180 182 9500 4180 182 9502 1)
4 Pump piston 4180 121 5803 --- 1)
5 Sealing ring 4180 122 3600 --- 1)
6 Spring 4180 122 3002 --- 1)
7 Strainer 1120 121 7800 --- 1)
8 Pump piston kit --- 4180 120 9701
9 Choke shaft 4180 121 3002 4180 121 3003 1)
10 Throttle shaft with lever 4180 120 7102 4180 120 7105 1)
11 Sealing ring --- 4180 122 3601
12 Washer --- 4180 121 8601
13 Cover --- 4180 123 0600
14 Push nut --- 9286 929 0030
15 Screw --- 9074 478 3025
16 Filter cover 4180 140 1000 4180 140 1003 1)
17 Filter housing 4180 140 2802 4180 140 2805 3)
18 Spacer flange 4180 120 2300 4180 120 2302 3)
Modification to be introduced : continuously
Remarks
1) Previous version of part remains available for older models
2) Individual parts of the previous carburetor remain available
3) Previous version of part no longer available from factory
© ANDREAS STIHL AG & Co. KG 2008 Technical Documentation
D1/MTK-bl
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Extracted from the manufacturer's 2012 service catalogue. Most of these PDFs embed fonts with a shifted character map, so the text above was recovered rather than copied — read it as a faithful but imperfect transcription, and treat the page image above each block as the authority where the two disagree — the figures exist only there, because they are vector drawings that text extraction cannot keep.