Technical Information · issue 21 of 2000
Fuel Tank; Cylinder Mounting Screws; Muffler / shr
Model FS 120, 200 Clearing Saws – Series 4134
IssueTI 21/2000
Full text
Page 1 of 4
Technical Information
21.2000
Model FS 120, 200 Clearing Saws – Series 4134
Contents
1. Fuel Tank
2. Cylinder Mounting Screws
3. Muffler / shroud
4. Intake system (contact plate, filter housing)
1. Fuel Tank
A modified intake hose and a new pickup body will The weight in the new pickup body 0000 350 3506
be installed from serial number 2 44 148 251. To is an integrally molded copper core. The new
ease identification, the modified intake hose components further enhance operational reliability
4128 358 0800 is colored green instead of the when the machine is swung back and forth.
previous black.
Summary
Item Part Name Previous New Remarks
1 Fuel tank; 4134 350 0400 4134 350 0400 1)
including:
2 Hose 4128 358 0800 4128 358 0800 1)
3 Pickup body 0000 350 3503 0000 350 3506 2)
Modification to be introduced: from serial number 2 44 148 251
Remarks
1) Only modified version of part is available from factory
2) Previous version of part remains available for other models
2. Cylinder Mounting Screws
The previous IS DG 5x24 spline socket head cap Service note:
screws used to mount the cylinder will be replaced The longer screws should also be installed as a
from serial number 2 46 616 989 by the longer
matter of routine during repairs to older machines
IS DG 5x28 screws.
(tightening torque 10 Nm).
Summary
Item Part Name Previous New Remarks
1 Spline screw IS DG 5x24 (4x) 9075 478 4159 --- 1)
2 Spline screw IS DG 5x28 (4x) --- 9075 478 4175
Modification to be introduced: from serial number 2 46 616 989
Remarks
1) Previous version of part remains available as spare (for other components)
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)m~ge 2 Technical Information 21.2000
3. Muffler / shroud
Mufflers have been further improved in the area of Parts availability:
the exhaust outlet and the exhaust windows in the The new mufflers can only be installed together with
shrouds have been modified accordingly. the new shrouds. Therefore, mufflers will be
These changes are effective with FS 120 serial no. available with shroud for older machines for a
2 43 369 310 and FS 200 serial no. 2 43 418 855. limited period.
1
2 4 1 4
5
3
4134 140 0606
4134 140 0600
4134 084 0900
250TI027 KN
250TI028 KN
4134 084 0902
Previous muffler and shroud New muffler and shroud
Summary
Item Part Name Previous New Remarks
1 Muffler (USA); 4134 140 0600 4134 140 0606 1)2)3)
including items 2, 3:
2 Screen 4134 141 9000 ---
3 Stub with screen --- 4140 140 6900
4 Shroud 4134 084 0900 4134 084 0902 1)2)
5 Spacer (USA) --- 4134 084 6800
Modification to be introduced: from FS 120 serial no. 2 43 369 310 and FS 200 serial no. 2 43 418 855
Remarks
1) Previous version of part is no longer available from factory
2) New version of part may only be used together with new version of shroud
3) For all machines with spark arresting screen in exhaust muffler
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Technical Information 21.2000 Page 3
4. Intake system (contact plate, filter
housing)
4.1 Contact plate / throttle cable
4.2.1 Insert
3 4 2
Two inserts (2) have been installed for some time in
the filter housing (1) to improve the security of the
carburetor mounting.
4.2.2 Gasket
5
Self-adhesive gasket 4134 129 0900 (4) is
6 1 installed from serial number 2 47 951 505 to
optimize the seal between the filter housing (1)
250TI021 KN
and heat shield (3).
Factory-supplied replacement filter housings come
with the gasket already bonded in position.
A contact plate (3) and an additional gasket
4128 129 0900 (4) have been installed for some The adhesive gasket simplifies assembly of the heat
time to ensure that the throttle cable (1) is shield and filter housing during repair work.
electrically connected to the engine’s ground via Service note:
the carburetor (2) and thus to the ignition system’s
ground. Install the new gasket 4134 129 0900 on earlier
machines when carrying out repairs in the area of
When the hex nuts (5) are tightened, the claw on the carburetor.
the contact plate (arrow) is pressed into the collar
screw (6) and makes electrical contact with the
carburetor.
4.2 Filter housing (insert, gasket)
5
1 3 1
250TI023 KN
2
2
2 To fit the gasket (2), first make sure the filter housing
4 is free from oil, grease and dirt. Then peel off the
light backing sheet (5), line up the holes and stick
250TI022 KN
the gasket in position.
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)m~ge 4 Technical Information 21.2000
4.3 Collar screws
Service note
It is essential to use the longer collar screw
4134 122 6601 when upgrading previous machine
40 mm versions with all the parts described in 4.1 and 4.2.
(1 18/32")
Note on spare parts
For a short period of time the factory shipped the
42 mm previous collar screw 4134 122 6600 in a version
250TI024 KN
that is 2 mm longer. This interim version may be
(1 21/32") used like the new version and put into stock under
part number 4134 122 6601.
Top: Previous version
Bottom: New version
The sum of the individual modifications described in
chapters 4.1 and 4.2 necessitated a 2 mm increase
in the length of the collar screw. For this reason a
new longer collar screw 4134 122 6601 has been
installed for some time on the production line
together with the contact plate.
4.4 Summary
Item Part Name Previous New Remarks
1 Contact plate --- 4134 431 7000
2 Gasket (2x) 4128 129 0900 4128 129 0900 1)
3 Filter housing;
including item 4: 4134 140 2800 4134 140 2800 2)
4 Gasket --- 4134 129 0900
5 Collar screw (2x) 4134 122 6600 4134 122 6601 3)
Modification to be introduced
– for items 3 and 4: from serial number 2 47 951 505
– for all other items: in progress
Remarks
1) Quantity changed from 1 to 2
2) Only modified version of part is available from factory
3) Previous version of part will be supplied from factory only as long as existing stocks last
Last Technical Information on models FS 120, 200: 42.97
© 2000 Andreas Stihl AG & Co. Technical Documentation
Waiblingen D1/MTK-na 7017
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