Technical Information · issue 41 of 1997
Carburetor / ignition module; Electronic cut-off;
Model Machine no. /
IssueTI 41/1997
From serial 37 759 999, 37 761 799
Part changes (2)
| Was | Becomes | What the bulletin says |
|---|---|---|
| 4137 121 8900 | 4128 121 8900 | 366TI019 KN LA LA To ensure standardization with other series, the stud 4137 121 8900 for attaching the nipple on the throttle cable will be replaced by version Symbols for adjustment on HS machines 4128 121 8900 in future. |
| 4119 890 3400 | 4128 890 3400 | In order to standardize parts with the new brushcutters, the combination wrench QNNV=UVM=PQMM=E1F=supplied with the machines is 3 replaced by version QNOU=UVM=PQMM=E2F. |
Full text
Page 1 of 6
Technical Information
41.97
Blowers===============================BG 75===============- type 4227
Hedge trimmers========================HS 75, 80, 85=======- type 4226
Hedge cutters=========================HL 75===============- type 4230
Telescopic pruner=====================HT 75===============- type 4138
Brushcutters==========================FS 75, 80, 85=======- type 4137
Lawn edger============================FC 75===============- type 4137
&RQWHQWV
1. Carburetor / ignition module
1.1 FC, FS, HS: carburetor without high speed
adjusting screw
FC, FS, HL, HT: carburetor C1Q-S28 -
stud / throttle shaft
1.2 Electronic limitation of the maximum speed
2. FS, HS: scope of supply / combination wrench
3. Starter / ElastoStart rope
4. Carburetor / air filter (seal on heat shield)
1.=Carburetor / ignition module
1.1=Carburetor without high speed adjusting
screw =FC, FS, HS
In carburetors without high speed adjusting screw,
the fuel is delivered via the valve jet with integrated
fixed jet EB= when operating at both part throttle
and full throttle.
A B
366TI024 KN
A = Idle-speed fixed jet
B = Valve jet with integrated fixed jet
)41.97 - 2
Note for service
The symbols H, L, LA=previously featured on the
shroud for the carburetor adjustment screws are
no longer used. Only the symbols / and /$ are
now required, since a high speed adjustment H L H L
screw is no longer present.
Carburetor C1Q-S28 =FC, FS, HL, HT
366TI019 KN
LA LA
To ensure standardization with other series, the
stud 4137 121 8900 for attaching the nipple on the
throttle cable will be replaced by version Symbols for adjustment on HS machines
4128 121 8900 in future. Left: With high speed adjusting screw
Right: Without high speed adjusting screw
1.2===Electronic limitation of the
maximum speed
A new version without speed control valve E4F=will
be installed instead of the carburetor with speed
control valve E3X=~rrow) on the machine numbers li-
sted below. fo
At the same time, the former ignition module
will be replaced by a new version with
integrated electronic limitation of the
maximum speed (referred to below as
(lectronic 6peed /imitation ESLF.
366TI020 KN
3 4
1.3.1=Introduction of modification
Model Machine no. /
Introduction of modification
FC 75 X 37 801 959
FS 75 X 37 878 261
FS 80 X 37 759 999
FS 85 X 37 838 653
HL 75 X 37 761 799
HS 75 X 37 810 310
HS 80 X 37 810 310
HS 85 X 37 810 310
HT 75 X 37 772 428
)41.97 - 3
1.2.2===Servicing / replacement parts
1.2.2.1=Ignition module
The ignition module with ESL can be identified by
the marking [[[[ = 1306 or 1307 when 5
GLVDVVHPEOHG.
Ignition module "1307" only differs from version
"1306" through the additional insulating hose E5F
for the ignition cable and is generally supplied as a
replacement part.
The insulating hose E5F=is not required for the
BG and HS machines. However, the new
replacement ignition module can be installed
ZLWK insulating hose.
STIHL 4137 XXXX A
1.2.2.2=Carburetor
366TI021 KN
• All models except BG 75
In order to ensure that the ignition module is not
combined with a carburetor ZLWKRXW limitation of
the maximum speed when repairing machines,
New ignition module with identification
replacement carburetors will generally be supplied
ZLWK speed control valve in future.
Only the new ignition module 4137 400 1307 (with
ESL) may be installed in machines without speed
control valve!
The machines must not be operated without
limitation of the maximum speed, otherwise
the engine may be damaged!
In the case of machines in which the new ignition
module is already fitted, installation of the new
carburetor with speed control valve produces a
situation in which both the carburetor and the
ignition module operate with speed limitation in a
single power unit. This has no effect on either the
performance or operation of the power unit.
• BG 75
Due to the power required by the fan wheel, it is
unnecessary to limit the maximum speed through
either the carburetor or the ignition module in this
model.
Nevertheless, the ignition module with
ESL 4137 400 1307 will be used for replacements
in order to standardize parts in line with the other
models. The former ignition module 4137 400
1305 can only be used for this model while stocks
last.
)41.97 - 4
1.2.2.3=Technical specifications / settings
The speed ranges for limitation of the maximum
speeds in the individual models remain
unchanged. The carburetor settings also remain
unchanged.
1.3====Summary
Item Part name Original New Remarks
version version
1.1
FC, FS, HL, HT
Carburetor C1Q-S28; 4137 120 0600 4137 120 0600 2)
including Item 1:
1 Stud 4137 121 8900 4128 121 8900 3)
All other parts as before
1.2:=================================================fo
Ignition module; 4137 400 1305 4137 400 1307 1)
including Item 2:
2 Insulating hose 4137 442 0400 4137 442 0400
FC, FS, HL, HT
Carburetor C1Q-S28; 4137 120 0600 --- 4)
including Items 3 and 4:
Carburetor C1Q-S41 --- -*- 5)
3 Speed control valve 4137 120 8700 --- 4)
4 Washer 4226 121 8600 --- 4)
+6
Carburetor C1Q-S29; 4226 120 0602 --- 4)
including Items 4 and 5;
Carburetor C1Q-S42 --- -*- 5)
5 Speed control valve 4226 120 8700 --- 4)
All other parts as before
Modification to be introduced
- 1.1: continuously
- 1.2: see 1.2.1 "Introduction of modification"
5HPDUNV
1) Original version of part is no longer available from factory.
2) Only modified version of part is now available from factory.
3) Original version of part is only available from factory while stocks last.
4) Part remains available.
5) Part is not available as a single part. Carburetor C1Q-S4X contains the same replacement parts
as version C1Q-S2X except Items 3 and 4 or 4 and 5.
)41.97 - 5
2.=Scope of supply / combination wrench
FS, HS
4 4
In order to standardize parts with the new
brushcutters, the combination wrench
QNNV=UVM=PQMM=E1F=supplied with the machines is 3
replaced by version QNOU=UVM=PQMM=E2F.
40 mm 50 mm
The new combination wrench includes an (1.57") (2")
additional hex key for size NP=E3FK=qhe sleeve E4F
for size 19 is approx. 10 mm (3/8") longer on the
new combination wrench than on the original
version.
366TI022 KN
1 2
6XPPDU\
Item Part name Original
fo New Remarks
version version
Combination wrench 4119 890 3400 4128 890 3400 1)
Modification to be introduced continuously.
5HPDUNV
1) Original version of part remains available.
3.=Starter / ElastoStart rope
In order to standardize the supply of replacement
parts, the original starter rope 4123 190 4000
(2.7 x 900 mm) has for some time been replaced
by the ElastoStart version 0000 195 8200
(3.0 x 800 mm).
This change also applies for the following models:
BG 72, FC 72, FS 48, 52, 56, 62, 66, 72, 74, 76,
HS 72, 74, 76.
6XPPDU\
Item Part name Original New Remarks
version version
Starter rope 4123 195 8200 0000 195 8200 1)
Modification to be introduced continuously.
5HPDUNV
1) Original version of part is no longer available from factory.
)41.97 - 6
4.=Carburetor / air filter
Gasket QNNQ=NQV=NOMR=E1F=has for some time been
fitted on both sides of the heat shield E2F=in order to 1
optimize the seal.
2
1
Service note
366TI023 GM
Missing gaskets must be fitted in models with the
original version.
6XPPDU\
Item Part name Original New Remarks
version version
Gasket (2x) --- 4114 149 1205
Modification to be introduced continuously.
Last Technical Information on BG 75 TI 42.96 (TI 27.97 USA only)
FC 75: TI 37.97
FS 75, 80, 85: TI 37.97
HL 75: TI 37.97
HS 75, 80, 85: TI 04.97
HT 75 TI 37.97
1997 Andreas Stihl Andreas Stihl - D1/MTK-na
Technical Documentation 6215 Page 2 of 6
Page 3 of 6
Page 4 of 6
Page 5 of 6
Page 6 of 6
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.