Technical Information · issue 17 of 2003
Carburetor; Grommet; Handle housing; Service tool
IssueTI 17/2003
Engine family 1123
Full text
Page 1 of 5
STIH)
Technical Information
17.2003
Chainsaws STIHL MS 210, MS 230, MS 250 – Series 1123
Contents
1.
2.
Carburetor
Grommet
3. Handle housing
4. Service tool for oil pump
5. Spare parts
6. Service notes
7. Summary
1. Carburetor
H
H L
3 /4 L
208TI013 KN
208TI003 KN
Left: Previous carburetor WT-215 / WT 286A The machines can be distinguished externally by
Right: New carburetor C1Q-S84 / 85 / 86 / 87 the openings for the adjusting screws. Machines
with the new carburetors have the opening for the
In order to comply with future emission standards in low speed adjusting screw L in the handlebar.
Europe, the previous carburetors are being
replaced by carburetors with limiter caps.
The new carburetors have caps on the high speed
adjusting screws in order to limit the adjusting
range.
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)m~ge 2 Technical Information 17.2003
MS 210 1.2 Function
In machines without manual fuel pump,
carburetor WT-215 will be replaced by the
new version C1Q-S87.
In machines with manual fuel pump,
carburetor WT-286A will be replaced by the
new version C1Q-S86.
MS 230, MS 250 270°
In machines without manual fuel pump,
carburetor WT-215 will be replaced by the
new version C1Q-S85.
208TI007 KN
In machines with manual fuel pump,
carburetor WT-286A will be replaced by the
new version C1Q-S84.
The cap limits adjustment of the carburetor to a
certain range (270 degrees).
1.1 Mechanical design 1.3 Repair / maintenance / basic setting
1
4
2
3
208TI008 KN
208TI005 KN
. Low speed adjusting screw (1) If the high speed adjusting screw has to be replaced
. High speed adjusting screw (2) or the carburetor has to be cleaned, the cap on the
high speed adjusting screw must be removed by the
. Limiter cap for the high speed adjusting service engineer.
screw (3)
. Remove cap with suitable pliers
. Stop pin (4)
Caps which have been removed must never be
reused. They must be replaced by new caps.
1.3.1 Adjustment after repair / maintenance
. Check air filter – clean or replace it if necessary
. Examine spark arresting screen – clean or
replace it if necessary
. Examine fuel filter – clean or replace it if
necessary
208TI006 KN
. Check chain tension
The cap is fitted over the head of the adjusting
screw and locked in position by the knurling on the
adjusting screw. A stop pin on the carburetor
housing (arrow) serves as guide.
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Technical Information 17.2003 Page 3
1.3.2 Basic setting Set the specified speeds within the tolerance range
of +/– 200 rpm.
1. Set speed to 3300 rpm with idle speed adjusting
screw (LA)
H L
2. Turn the low speed adjusting screw (L) clockwise
or anticlockwise to obtain the highest speed
If this speed is greater than 3700 rpm:
Stop adjustment and resume with step 1.
3. Set the speed to 3300 rpm again with the idle
208TI009 KN
speed adjusting screw (LA)
4. Set the speed to 2800 rpm with the low speed
adjusting screw (L)
. Starting from the tight position of the adjusting
screws: 1.3.5 Check for smooth running
H = Back off 1 1/2 turns
. Press the throttle several times – check that the
L = Back off 1 turn
engine accelerates smoothly
1.3.3 Securing the cap . The engine must run smoothly at idle speed
Always use a new cap! Caps which have been
removed must never be reused.
1.4 fo Notes for the user
H
H L
3 /4 L
1
H
LA
208TI003 KN
208TI010 KN
. Switch off engine
. Align cap for the high speed adjusting screw (H)
with the stop pin (arrow) . Check air filter – clean or replace it if necessary
. Press cap into place until it rests against the . Check chain tension
carburetor housing . Turn high speed adjusting screw H as far as
possible anticlockwise (max. 3/4 turn)
1.3.4 Idle speed adjustment
. Carefully turn low speed adjusting screw L
clockwise onto its seat, then back off 1 turn
anticlockwise
L These instructions are identical with those in the
user manual (section "Carburetor adjustment").
208TI015 KN
. Set idle speed with speed tester as follows:
TI_17_2003_01_01_01.fm
)m~ge 4 Technical Information 17.2003
The user can adjust the setting of the high speed 4. Service tool for oil pump
adjusting screw H within a range of 270 degrees.
This allows the carburetor to be set to a leaner A press sleeve for the MS 210, MS 230 and MS 250
setting, for instance when working in mountain has been added to the service tool 1123 890 2201
country. for installing and removing the oil pump. The press
sleeve for previous machine versions is marked
1.5 Spare parts "1123" and the new press sleeve "1123/01".
The set of carburetor parts 1123 007 1060 (special The new press sleeve positions the oil pump at a
accessory) will be available in future for the new depth of 6 mm instead of 4.5 mm as in the past.
carburetors with limiter caps.
2. Grommet A A
135TI040 KN
Left: Previous connector
208TI014 KN
Right: New connector
Left: Previous grommet 1123 123 7503 The press sleeve to be used depends on the
Right: New grommet 1123 123 7504 diameter of the bore A in the connector to the oil
pump:
Since the distance between H and L screws is Bore A Marking on press
different on the new carburetors, the previous sleeve
grommet is replaced by a new version. Previous 4.2 mm 1123
New 5.4 mm 1123/01
3. Handle housing Refer also to TI 08.2002.
Since the distance between H and L screws is
different on the new carburetors, the previous
handle housing is replaced by a new version with a
5. Spare parts
recess for the grommet.
On machines without manual fuel pump, The part numbers of the hoses (endless lengths) for
the handle housing 1123 790 1017 is replaced by carburetor connections have changed.
the new version 1123 790 1013. 5.4 x 2.2 x 1000 mm
On machines with manual fuel pump, Previous: 0000 930 2800 New: 0000 930 2802
the handle housing 1123 790 1015 is replaced by
5.7 x 3.1 x 1000 mm
the new version 1123 790 1004.
Previous: 0000 930 2801 New: 0000 930 2803
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Technical Information 17.2003 Page 5
6. Service notes The hose now measures 5.4 x 2.2 x 100 mm.
The connection for the manual fuel pump is located The hose used is the same as in the past
in a different position on the new carburetors for (endless length):
machines with easy starting. This means that a 5.4 x 2.2 x 1000 mm 0000 930 2802
different length of hose is required between the
manual fuel pump and carburetor when carrying out
repairs.
7. Summary
Item Part name Previous New Remarks
MS 210
1 Carburetor WT-215 1123 120 0605 --- 1)
2 Carburetor C1Q - S87 --- 1123 120 0609
3 Carburetor WT-286A 1123 120 0615 --- 1)
(man. fuel pump)
4 Carburetor C1Q - S86 --- 1123 120 0608
(man. fuel pump)
MS 230, MS 250
5 Carburetor WT-215 1123 120 0605 --- 1)
6 Carburetor C1Q - S85 1123 120 0607
7 Carburetor WT-286A 1123 120 0615 --- 1)
(man. fuel pump)
8 Carburetor C1Q - S84 1123 120 0606
(man. fuel pump)
All machines
9 Set of carburetor parts 1123 007 1061 1123 007 1060 1)
10 Grommet 1123 123 7503 1123 123 7504 1)
11 Handle housing 1123 790 1017 1123 790 1013 1)
12 Handle housing (man. fuel pump) 1123 790 1015 1123 790 1004 1)
13 Hose 5.4 x 2.2 x 1000 mm 0000 930 2800 0000 930 2802 2)
14 Hose 5.7 x 3.1 x 1000 mm 0000 930 2801 0000 930 2803 2)
Modification to be introduced continuously
Remarks
1) Previous version of part remains available for older machines
2) Previous version of part is no longer available from factory
Last Technical Information on STIHL MS 210, MS 230, MS 250: 08.2002
© ANDREAS STIHL AG & Co. KG, 2003 Technical Documentation
D1/MTK-ja 7885
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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.