Technical Information · issue 22 of 2009
Carburetor; Tank housing, filter cover, screw; Fan cover; Summary
IssueTI 22/2009
Part changes (5)
| Was | Becomes | What the bulletin says |
|---|---|---|
| 4238 121 0800 | 4238 120 0600 | process, the previous end cover (1) 4238 121 0800 is being replaced by the new version (2) The previous part number 4238 120 0600 will be 4238 120 0850. |
| 4238 122 3201 | 4238 122 3202 | 2 Carburetor C1Q-S118B previous torsion spring (3) 4238 122 3201 will be With the introduction of the new fixed jet and the replaced by the new version (4) 4238 122 3202. |
| 4238 121 5600 | 4238 121 5601 | To further improve function, the previous fixed jet Identification Version 4238 121 5600 is replaced by the new version 4238 121 5601. |
| 4238 122 6700 | 4238 122 6701 | 70 mm 4238 122 6700 will be replaced by the new version 4238 122 6701. |
| 4238 350 0813 | 4238 350 0850 | The previous tank housing 4238 350 0813 is being no further than stop) replaced by the new version 4238 350 0850. |
Full text
Page 1 of 7
STIH)
Technical Information 22.2009
Cut-off machine STIHL Cutquik® TS 410, 420 – Series 4238
Contents
1. Carburetor
2. Tank housing, filter cover, screw
3. Fan cover
4. Summary
1. Carburetor
To further improve function, the previous carburetor
4238 120 0600 is being modified in two stages:
. 1. stage
Introduction of a new end cover and a new
torsion spring
. 2. stage
Introduction of a new fixed jet and a new high
speed screw
The previous part number 4238 120 0600 is being
retained for the new versions of the carburetor. The
new versions are identified by a changed index in
the marking on the carburetor (see b 1.1).
TI_22_2009_30_01_01.fm englisch / English
)m~ge 2 Technical Information 22.2009
1.1 Type and position of designation on 1.2 End cover, torsion spring
carburetor
1
3
S118
S118 A XXXX X
S118 B
2
4
370TI046 KN
370TI045 KN
Top: Previous versions of end cover and
torsion spring
1.1.1 Carburetor C1Q-S118A
Bottom: New versions of end cover and
With the introduction of the new end cover and the torsion spring
new torsion spring (see b 1.2), the designation of
the carburetor 4238 120 0600 will be changed from Due to an improvement in the manufacturing
C1Q-S118 to C1Q-S118A. process, the previous end cover (1) 4238 121 0800
is being replaced by the new version (2)
The previous part number 4238 120 0600 will be
4238 120 0850. The new end cover (2) differs from
retained.
the previous version (1) by changes in shape in the
connection area of the compensator hose.
With the introduction of the new end cover (2), the
1.1.2 Carburetor C1Q-S118B
previous torsion spring (3) 4238 122 3201 will be
With the introduction of the new fixed jet and the replaced by the new version (4) 4238 122 3202.
new high speed screw (see b 1.3), the designation The geometry of the new torsion spring (4) has been
of the carburetor 4238 120 0600 will be changed adapted to the changes in shape of the new end
from C1Q-S118A to C1Q-S118B. cover and differs from the previous version by the
The previous part number 4238 120 0600 will be changed alignment (arrows) at the compensator
retained. connector. The new torsion spring (4)
4238 122 3202 is included with the new end
cover (2) 4238 120 0850.
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Technical Information 22.2009 Page 3
1.2.1 Service notes / spare parts 1.3.1 Marking of the fixed jet
The previous end cover 4238 121 0800 is no longer
available. The new end cover 4238 120 0850, with
new torsion spring 4238 122 3202 included, can
also be used for the previous carburetor with the
designation C1Q-S118. The new end cover
4238 120 0850 may only be used in combination
with the new torsion spring 4238 122 3202.
The previous torsion spring 4238 122 3201 remains
available for carburetors with the previous end cover
370TI047 KN
4238 121 0800. The previous torsion spring
4238 122 3201 may only be used in combination
with the previous end cover 4238 121 0800.
The diameter of the jet bore can be read on the fixed
jet after removal of the end cover, metering
1.3 Fixed jet, high speed screw diaphragm and the gasket.
To further improve function, the previous fixed jet Identification Version
4238 121 5600 is replaced by the new version
4238 121 5601. The new fixed jet 4238 121 5601 65 Previous fixed jet
differs from the previous version by a larger jet bore. 4238 121 5600; diameter of
The diameter of the jet bore can be determined from the jet bore is 0.65 mm
the marking of the fixed jet (see b 1.3.1). 70 New fixed jet 4238 121 5601;
With the introduction of the new fixed jet diameter of the jet bore is
4238 121 5601, the previous high speed screw 0.70 mm
4238 122 6700 will be replaced by the new version
4238 122 6701.
1.3.2 Service notes / spare parts
The previous versions of the fixed jet
4238 121 5600 and the high speed screw
4238 122 6700 are no longer available.
For the carburetors C1Q-S118 and C1Q-S118A with
the previous versions of the fixed jet and high speed
screw, the new "High speed adjusting screw kit“
4238 120 9800 is available as a spare part. The new
"High speed adjusting screw kit" 4238 120 9800
contains the new versions of the fixed jet
4238 121 5601 and the high speed screw
4238 122 6701. The new fixed jet may only be used
in combination with the new high speed screw.
For the carburetor C1Q-S118B with new versions of
the fixed jet and the high speed screw and previous
carburetors (C1Q-S118 and C1Q-S118A
respectively), in which the new versions of the fixed
jet and high speed screw have already been
installed, the new fixed jet and the new high speed
screw are available individually.
TI_22_2009_30_01_01.fm
)m~ge 4 Technical Information 22.2009
1.3.3 Settings 2.1 Tank housing
With the introduction of the new versions of the fixed
jet 4238 121 5601 and the high speed screw
4238 122 6701, the basic setting without limiter cap
for the high speed screw H also changes. This
affects the carburetors with the designation C1Q-
S118B and previous carburetors (C1Q-S118 and
C1Q-S118A respectively), in which the new
versions of the fixed jet and the high speed screw
have already been installed.
The following settings apply:
Basic setting without limiter cap on the high
speed screw H
Low speed screw L: 1 turn open
High speed screw H: 1.5 turns open
Standard setting with limiter cap on the high
370TI048 KN
speed screw H
Low speed screw L: 1 turn open
High speed screw H: 3/4 turn open (max. The previous tank housing 4238 350 0813 is being
no further than stop) replaced by the new version 4238 350 0850. The
new tank housing contains modified threaded
inserts (arrows) for screwing on the filter cover. The
improved filter cover (see b 2.2) and the new
screws (see b 2.2) for screw-mounting the new
2. Tank housing, filter cover, screw filter cover are enclosed with the new tank housing
4238 350 0850.
For further improvement of the screw connection
between tank housing and filter cover, the following
measures have been taken:
2.1.1 Spare parts
. New tank housing (see b 2.1) with improved
threaded inserts The previous tank housing is no longer available.
The new tank housing can also be used for older
. New filter cover (see b 2.2) with knurled
machines.
bushings
. New screws (see b 2.2) with mounting pegs
. Modifications introduced, 2.1.2 Service notes
serial # 170 073 909 If a new tank housing is installed, always fasten the
If a new tank housing is installed, always fasten the new filter cover with the new screws.
new filter cover with the new screws.
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Technical Information 22.2009 Page 5
2.2 Filter cover, screw With the introduction of the new tank housing (see
b 2.1), in the previous filter cover (1)
4238 140 1000, the previous bushing (2)
0000 963 0809 is being replaced by a new, knurled
4 5 6
version. The new bushing is permanently integrated
2 in the filter cover (3) and not available as a spare
part. The part number of the previous filter cover
4238 140 1000 is being retained for the new filter
cover.
With the introduction of the new tank housing (see
4 5 b 2.1), the previous screw (4) IS-M5x20-12.9 –
9022 371 1020 (4x) for fastening the filter cover to
2
the tank housing is being replaced by the new
version (5) IS-M5x20-10.9 – 0000 951 1109. The
new version (5) has a lead in (6) and simplifies
1 3 mounting of the filter cover.
370TI049 KN
2.2.1 Spare parts
The previous bushing 0000 963 0809 remains
Left: Previous versions of the filter cover, available for previous filter covers.
bushing and screw without lead in The new, knurled bushing is not available as a spare
Right: New filter cover, ("C" index or higher) part.
with permanently integrated bushing,
new screw with lead in The previous screw IS-M5x20-12.9 –
9022 371 1020 remains available for other
applications.
TI_22_2009_30_01_01.fm
)m~ge 6 Technical Information 22.2009
3. Fan cover
1 3
2
370TI050 KN
Left: Previous version of the fan cover and
bushing
Right: New version of the fan cover with
permanently integrated bushing
For further improvement of the screwed connection,
the previous bushing (2) 0000 963 0809 (3x) in the
previous fan cover (1) 4238 080 3100 is being
replaced by a new, knurled version. The new
bushing is permanently integrated in the fan
cover (3) and is not available as a spare part. The
part number of the previous fan cover
4238 080 3100 is being retained for the new fan
cover.
3.1 Spare parts/service notes
The previous bushing 0000 963 0809 remains
available for previous fan covers.
The new, knurled bushing is not available as a spare
part.
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Technical Information 22.2009 Page 7
4. Summary
Item Part Name Previous New Rem.
Carburetor, 1st stage
1 Carburetor C1Q-S118; 4238 120 0600 --- 1)
including Items 3, 5
2 Carburetor C1Q-S118A; --- 4238 120 0600 2)
including Items 4, 5
3 End cover 4238 121 0800 --- 1) 5)
4 End cover; --- 4238 120 0850 2) 5)
including Item 5
5 Torsion spring 4238 122 3201 4238 122 3202 4) 5)
Carburetor, 2nd stage
6 Carburetor C1Q-S118A; 4238 120 0600 --- 7)
including Items 8, 10
7 Carburetor C1Q-S118B; --- 4238 120 0600 2)
including Items 9, 10;
other parts as previously, see spare parts list
8 Fixed jet 0.65 4238 121 5600 --- 1) 5) 6)
9 Fixed jet 0.70 --- 4238 121 5601 5)
10 High speed screw 4238 122 6700 4238 122 6701 1) 5) 6)
11 High speed adjusting screw kit; --- 4238 120 9800 2) 5)
including Items 9, 10
Tank housing, filter cover, fan cover
12 Tank housing 4238 350 0813 --- 1)
13 Tank housing; --- 4238 350 0850 2) 5)
including Items 14, 15, 17
other parts as previously, see spare parts list
14 Filter cover; 4238 140 1000 4238 140 1000 1) 2)
including Item 15
15 Bushing 0000 963 0809 -*- 4)
16 Spline screw IS-M5x20-12.9 9022 371 1020 --- 3)
17 Spline screw IS-M5x20-10.9 --- 0000 951 1109 2)
18 Fan cover; 4238 080 3100 4238 080 3100 1) 2)
including Item 15
Modification to be introduced : continuously
Remarks
1) Previous version of part no longer available from factory
2) New version of part can also be used for older machines
3) Previous version of part remains available for other applications
4) Previous version of part remains available for older machines
5) See "Service notes"
6) Replace previous version with Item 11
7) Part remains available from the factory until availability of the new carburetor C1Q-S118B
© ANDREAS STIHL AG & Co. KG, 2009 Technical Documentation
D1/MTK-fr
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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.