Technical Information · issue 10 of 2000
Clutch housing, support; Carburetor; Fuel tank; Mu
Model FS 350 Clearing Saws - Series 4134
IssueTI 10/2000
Full text
Page 1 of 6
Technical Information
10.2000
Model FS 350 Clearing Saws - Series 4134
Model FS 450 Clearing Saws - Series 4128
Contents
1. Clutch housing, support
(FS 350, 450 only)
2. Carburetor (FS 450)
3. Fuel tank
4. Muffler / shroud
5. Gearhead, guard rings
(FS 350, 450 only)
6. Cylinder mounting
1. Clutch housing, support
(FS 350, 450 only)
A number of changes have been made to further
increase the strength of the clutch housing.
Furthermore, the support (the connecting element 9 8 7 5 6
between the AV housing and drive tube) will be
secured to the tube with a clamp instead of a screw
and nut. The parts affected by the modification
(clutch housing, support) may be replaced
individually. The new support will only be supplied
complete with the clamp. For the introduction of the
4 3
modification and the part numbers see “Summary”.
256TI000 KN
Summary
Item Part Name Previous New Remarks
1 Clutch housing (FS 350) 4134 160 0600 4134 160 0603 1)
2 Clutch housing (FS 450) 4128 160 0600 4128 160 0601 1)
3 Support; including items 4 to 6: --- 4128 790 7650
4 Support 4128 791 7600 -*- 1)2)
5 Clamp; including item 6: --- 4128 710 6700
6 Spline screw IS M5x18 --- 9022 341 1010
7 Spline screw IS M6x25 9022 341 1350 --- 3)
8 Washer A 6.4 9291 021 0140 --- 3)
9 Locknut V M6 9214 320 0900 --- 3)
Mod. to be introduced: Clutch housing from serial number 1 45 911 623; support from 1 42 780 795
Remarks
1) Previous version of part no longer available from factory
2) New version of part not available as separate item
3) Previous version of part remains available for older machines
TI_10_2000_30_02.fm englisch / english
)m~ge 2 Technical Information 10.2000
2. Carburetor (FS 450)
A modified carburetor will be installed in machines Parts availability
from serial number 1 44 682 618: The depth of the In order to ensure interchangeability, the new
groove on the throttle shaft has been reduced and a “throttle shaft with lever” 4128 120 7150 will be
new E-clip is now being used. The type designation supplied with the new E-clip 1120 122 9000.
was changed from C1Q-S34C to C1Q-S34D. A
further change (nickel-plated choke shaft) means
that the latest type designation is now C1Q-S34E.
Summary
Item Part Name Previous New Remarks
Carburetor C1Q-S34C; 4128 120 0651 --- 1)
Carburetor C1Q-S34D/E; --- 4128 120 0651
each of above includes items 1 to 3:
1 Throttle shaft with lever; 4128 120 7100 4128 120 7150 2)
including item 2:
2 E-clip --- 1120 122 9000
3 E-clip 1125 122 9001 --- 3)
Modification to be introduced from serial number 1 44 682 618
Remarks
1) Only new version of part is available from factory
2) Previous version of part no longer available from factory
3) Previous version of part remains available for older machines and other models
3. Fuel tank
A modified suction hose and a new pickup body will A copper core is injected into the new pickup body
be installed in future. The improved version of the 0000 350 3506 as a weight. These new parts further
suction hose 4128 358 0800 is dyed green for easy enhance running behavior when the machine is
identification. The previous hose was black. swung back and forth.
Note: This change has also been incorporated in
model BT 120 C augers.
Summary
Item Part Name Previous New Remarks
1 Fuel tank (FS 350); 4134 350 0400 4134 350 0400 1)
2 Fuel tank (FS 450); 4128 350 0400 4128 350 0401 1)
each of above includes:
3 Hose 4128 358 0800 4128 358 0800 1)
4 Pickup body 0000 350 3503 0000 350 3506 2)
Modification to be introduced: in progress
Remarks
1) Only modified version of part is available from factory
2) Previous version of part remains available for other models
TI_10_2000_30_02.fm Page 2 of 6
Technical Information 10.2000 Page 3
4. 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 may be used only with the new
shrouds modified accordingly. shrouds. For this reason, mufflers with shrouds
for older machines will be available for a limited
period.
Previous mufflers and shrouds New mufflers and shrouds
1 6 1 9
2 7
8 3 3
4134 140 0606
4134 140 0600 4128 140 0601
4128 140 0600
FS 350 FS 350
FS 450
FS 450
4 10 5 4 11
13
15
14
256TI005 KN
256TI006 KN
4134 084 0900 4128 084 0900 4134 084 0902 4128 084 0901
FS 350 FS 450
FS 350 FS 450
TI_10_2000_30_02.fm
)m~ge 4 Technical Information 10.2000
Summary
Item Part Name Previous New Remarks
FS 350
1 Muffler (USA, CDN, AUS); including 4134 140 0600 4134 140 0606 1)2)
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
FS 450
6 Muffler; including items 7, 8: 4128 140 0600 --- 1)
7 Screen 4128 141 9000 ---
8 Self-tapping screw 4.2x9.5 9099 021 0810 ---
9 Muffler (USA, CDN, AUS); including --- 4128 140 0601 2)
item 3
10 Shroud 4128 084 0900 --- 1)
11 Shroud (USA, CDN, AUS) --- 4128 084 0901
12 Muffler kit (USA, CDN, AUS); including --- 4128 140 0651 3)
items 3, 9, 11, 13 to 15:
13 Wire guard (USA) --- 4128 141 2600
14 Spline screw IS P4x14 (USA) --- 9074 478 3005
15 Washer 4.3 (USA) --- 9307 021 0100
Modification to be introduced: FS 350 from serial number 1 42 687 299
FS 450 from serial number 1 44 681 189
Remarks
1) Previous version of part no longer available from factory
2) New version of part may be used only with new version of shroud
3) Muffler with shroud for older machines (up to serial number: see “Modification to be introduced“)
TI_10_2000_30_02.fm Page 3 of 6
Technical Information 10.2000 Page 5
5. Gearhead, guard rings
(FS 350, 450 only)
Hardened versions of the guard rings (sawing and
mowing versions) will be installed in machines from
serial number 1 43 804 727. From serial number
1 46 095 824 the guard rings will be secured with
metric screws instead of the previous IS DG 5x12
self-tapping spline screws. The gear housing has
M5 tapped holes and comes with three IS M5x10
spline socket head screws.
Summary
Item Part Name Previous New Remarks
Gearhead; including items 1 to 5: 4128 640 0125 4128 640 0125 1)
1 Gear housing; including item 3: 4128 641 0305 4128 641 0350 2)
2 Self-tapping spline screw IS DG 5x12 9075 478 4095 --- 3)
3 Spline screw IS M5x10 --- 9022 399 0950
4 Guard ring (mowing version) 4128 717 2700 4128 717 2701 2)
5 Guard ring (sawing version) 4128 717 2705 4128 717 2706 2)
Modification to be introduced: Hardened guard rings from serial number 1 43 804 727
Metric thread from serial number 1 46 095 824
Remarks
1) Only modified version of part is available from factory
2) Previous version of part no longer available from factory
3) Previous version of part remains available for older machines
TI_10_2000_30_02.fm
)m~ge 6 Technical Information 10.2000
6. Cylinder mounting
The IS DG 5x24 self-tapping spline screws used up Service note: Use the longer screws as a matter of
to now to mount the cylinder have been deleted and routine for repairs on older machines, too (torque
replaced by IS DG 5x28 screws. down to 10 Nm).
Summary
Item Part Name Previous New Remarks
1 Spline screw IS DG 5x24 (4 x) 9075 478 4159 --- 1)
2 Spline screw IS DG 5x28 (4 x) --- 9075 478 4175
Modification to be introduced: in progress
Remarks
1) Previous version of part remains available for other applications
Last Technical Information on models FS 350, 450: 31.98, 20.98, 19.98
© 2000 Andreas Stihl AG & Co. Technical Documentation
Waiblingen D1/MTK-sc 6869
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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.