Technical Information · issue 14 of 2002
Technical Description; Product Designations; Speci
IssueTI 14/2002
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Technical Information
14.2002
STIHL CombiSystem – Series 4137, 4140
Contents
1. Technical Description
2. Product Designations
3. Specifications
4. CombiTools
5. Scope of Supply
6. Accessories for User
7. Service Accessories
8. Repairs
9. Spare Parts
The user can combine any CombiEngine with almost any CombiTool:
CombiSystem combination = CombiEngine + CombiTool
Additional CombiTools can be ordered separately.
Multi-purpose CombiEngines make the STIHL CombiSystem highly versatile.
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)m~ge 2 Technical Information 14.2002
The basic CombiEngines ("KM") with drive tube are . CombiTool drive tube:
available with a bike handle (KM 55 and KM 85) and Rigid shaft, except FCB-KM
a loop handle (KM 55 R and KM 85 R).
. Quickly disassembled for space-saving
Any CombiTool can be attached to the transportation
CombiEngine’s short drive tube. But not all possible . Fast tool changes
tool combinations are permitted – see assignment (STIHL CombiSystem)
table in chapter 4. The quick-action coupling is
designed so that the shafts self-align without any
additional twisting and turning. Controls
The following CombiTools are currently available:
BC-KM, FCB-KM, FCS-KM, FH-KM, FS-KM with
grass cutting blade 230-4 or AutoCut 25-2, HL-KM
(0°, 30° and 0 ... 90°), HT-KM and KW-KM.
The ability to change CombiTools enables a wide
STO
range of applications to be covered.
The multi-purpose STIHL CombiSystem is
exceptionally flexible: When ordering, the customer
decides with which CombiTool he wants to equip his
CombiEngine.
461TI001 BL
CombiEngine and CombiTool take up a minimum of
space for easy transportation and storage.
. Ergonomic bike handle, functions as on FS 55 T
or FS 85 T
1. Technical Description . The control handle of the KM 85 CombiEngine
Engine, controls, handle system and the coupling is equipped with an automatic tolerance adjuster
on the drive tube are the same as on the familiar for the throttle cable.
brushcutter models with a split boom (drive tube):
KM 55 and KM 55 R: FS 55 T
KM 85 and KM 85 R: FS 85 T
Drive Tube / Drive Shafts
461TI011 BL
. The slide (arrow) below the trigger interlock
shows the user whether the tolerance adjuster
has been activated and confirms that the throttle
393TI005 KN
cable is correctly adjusted (see also 8.2)
. CombiEngine drive tube: Gearhead (CombiTools)
KM 55 / KM 55 R: flexible shaft . As on the equivalent single-purpose power tools
KM 85 / KM 85 R: rigid shaft – see 4.1
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Technical Information 14.2002 Page 3
2. Product Designations
2.1 Nameplate
461TI002 KN
1 2
The model designation is printed on the
CombiEngine nameplate, e.g. KM 85 (1),
KM 85 R, KM 55 C, KM 55 RC (2), ...
2.2 Stock Names
The power tool assemblies in the CombiSystem are
referred to as combinations.
A combination consists of a CombiEngine and a
CombiTool.
Combinations are ordered by quoting the stock
name which is made up as follows: Model
designation of the CombiEngine, e.g. KM 85 R, and
the designation of the CombiTool, e.g. HL-KM
0...90°, i.e. KM 85 R HL 0...90°
Further examples:
. KM 85 R HT
= KM 85 CombiEngine (loop handle) with
HT-KM CombiTool
. KM 85 FS GSB 230-4
= KM 85 CombiEngine (bike handle) with
FS-KM CombiTool and grass cutting
blade 230-4
. KM 55 RC FS AutoCut 25-2
= KM 55 CombiEngine (loop handle and
catalytic converter) with FS-KM CombiTool and
AutoCut 25-2 mowing head
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)m~ge 4 Technical Information 14.2002
3. Specifications
3.1 Powerhead
3.1.1 Engine
Single cylinder two-stroke engine
KM 55, KM 55 R KM 85, KM 85 R
3 25.4 cm3
Displacement: 27.2 cm
Bore: 34 mm 34 mm
Stroke: 30 mm 28 mm
Engine power to ISO 8893: 0.75 kW (1.0 bhp) at 7,000 rpm 0.95 kW (1.3 bhp) at 8,500 rpm
Engine speeds: see 3.1.2 see 3.1.2
Rewind starter: Single pawl system Single pawl system
Starter rope: 3 mm dia., 1060 mm long 3 mm dia., 850 mm long
Clutch engages at: 4,200 rpm 4,000 rpm
3.1.2 Fuel System
Carburetor: All position diaphragm carburetor with integral fuel pump
High speed screw H (standard setting)
- without cap (service) Open 1 1/2 turns
- with cap (user) 3/4 turn counterclockwise
Low speed screw L (standard setting) Open 1 full turn
Idle speed screw LA as required
Idle speed 2,800 1/min
Cut-off speed without tool
(electronic speed governor) 9,500 rpm (KM 55 / KM 55 R)
10,500 rpm (KM 85 / KM 85 R)
Fuel
KM 55, KM 55 R KM 85, KM 85 R
Fuel tank capacity: 0.33 l (330 cm3 ) 0.44 l (440 cm3)
Fuel mix: Brand-name regular gasoline (leaded or unleaded) and
branded two-stroke engine oil
Mix ratio: 50:1 with STIHL 50:1 two-stroek engine oil
25:1 with other brand-name two-stroke engine oils
3.1.3 Ignition System
Ignition module: with integral electronic speed governor
Spark plug (suppressed): Bosch WSR 6 F or NGK BPMR 7 A
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Technical Information 14.2002 Page 5
3.2 Weight
CombiEngine Weight
without CombiTool dry
from 4.0 kg, depending on version
CombiTool Weight
without CombiEngine with tool and deflector
BC-KM 3.0 kg
FCB-KM 2.3 kg
FCS-KM 2.7 kg
FH-KM 2.7 kg
FS-KM 1.15 kg
without cutting tool and deflector fo
HL-KM 0° 2.3 kg
HL-KM 30° 2.65 kg
HL-KM 0 ... 90° 2.95 kg
HT-KM 1.8 kg
KW-KM 6.15 kg
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4. CombiTools
4.1 CombiTools
The following CombiTools are available:
1 FH-KM power scythe 7 FS-KM brushcutter with
grass cutting blade 230-4
2 HL-KM 0° 2) hedge cutter
8 FCS-KM 1) power edger
HL-KM 0...90° 1) hedge cutter
3
9 FCB-KM 1) power edger
4 HL-KM 30° 1) hedge cutter
10 BC-KM cultivator
5 HT-KM 2) pole pruner
11 KW-KM 2) PowerSweep
6 FS-KM brushcutter with AutoCut 25-2
1) Only of limited suitability for version with bike handle (for ergonomic reasons)
2) Not approved for version with bike handle
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Technical Information 14.2002 Page 7
4.2 Cuting Tools for FS-KM CombiTool
The FS-KM CombiTool is available with the
following cutting tools:
1 STIHL AutoCut 25-2 4002 710 2108
mowing head
2 Grass cutting blade 230-4 4001 713 3801
1 2
461TI003 BL
4.3 Assignment of CombiEngine / Combi-
Tools / Handles / Barrier Bar
4.3.1 Available Combinations
Combi Handle CombiTool
Engine
BC-
KM
FS-
KM
FS-
KM
FH-
KM
fo FCB- FCS- HL-
KM KM KM
HL-
KM
HL-KM HT-
0...90° KM
KW-
KM
Auto GSB* 0° 30°
Cut 230-4
25-2
KM 55 ++ ++ ++ ++ + + - + + - -
KM 85 ++ ++ ++ ++ + + - + + - -
461TI013 BL
KM 55 R ++ ++ ++ ++ ++ ++ ++ ++ ++ ++ ++
KM 85 R ++ ++ ++ ++ ++ ++ ++ ++ ++ ++ ++
461TI007 BL
++ very suitable
+ limited suitability for ergonomic reasons
- not approved
* grass cutting blade
The barrier bar is supplied with loop-handled
CombiEngines so that they can be used with all
CombiTools without the need for any retrofitting.
The barrier bar must be mounted before the
CombiEngine is handed over to the customer. This
enables the customer to use his unit for all
applications.
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4.4 Assignment of Cutting Tools to
FS-KM CombiTool
Combi Handle FS-KM CombiTool with
Engine
Mowing head Grass cutting Brush knife Circ. saw blade
blade
KM 55 ++ ++ - -
KM 85 ++ ++ ++ ++
461TI013 BL
KM 55 R ++ ++ - -
KM 85 R ++ ++ ++ -
461TI007 BL
++ very suitable
- not approved
5. Scope of Supply
The customer orders a combination consisting of a The second package, printed with an illustration of
CombiEngine and the required CombiTool. Every the CombiTool, contains:
possible combination can be ordered using a
. Drive tube
specific number.
. Complete CombiTool
Delivery is always in 2 packages:
The first package, printed with an illustration of the . Instruction manual
CombiEngine, contains: If the CombiTool is an FS-KM, the package also
. CombiEngine includes, depending on the version, either
. Loop handle with barrier bar or . an AutoCut 25-2 with special deflector for
bike handle (for mowing) mowing heads
. Combination wrench or
. Safety glasses . a grass cutting blade 230-4 with universal
deflector
. Instruction manual
. Harness (country-specific)
Every CombiSystem combination therefore
comes with two instruction manuals which must
be observed. The customer must be informed
accordingly.
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Technical Information 14.2002 Page 9
5.1 Converting Interchangeable Attachments Interchangeable attachment combinations can be
The previous interchangeable attachments must not converted to CombiTool combinations by
be used with the new CombiEngines because they exchanging the instruction manual.
do not include the appropriate instruction manual for
CombiTools.
Previous Part No. Instruction Manual New Part No. Instruction Manual
0458 400 xx21 FCB (attachment) 0458 471 xx21 FCB-KM
0458 406 xx21 FCS (attachment) 0458 472 xx21 FCS-KM
0458 402 xx21 HT (attachment) 0458 473 xx21 HT-KM
0458 381 xx21 BC 35 0458 474 xx21 BC-KM
0458 401 xx21 HL (attachment) 0458 475 xx21 HL-KM
0458 226 xx21 FH (attachment) 0458 476 xx21 FH-KM
0458 224 xx21 KW (attachment) 0458 477 xx21 KW-KM
xx = country code
6. Accessories for User
Part Name Part No. Application
Carrying bag 4137 903 3300 For convenient transportation of
CombiEngine with loop handle
and FS-KM or FC-KM CombiTool
461TI012 BL
Other accessories as for single-purpose power
tools.
7. Service Accessories
7.1 Special Servicing Tools
Special servicing tools are listed in the service
manuals for the CombiEngines and CombiTools.
7.2 Servicing Aids
. As for single-purpose power tools
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)m~ge 10 Technical Information 14.2002
8. Repairs
If the machine is started up in the course of
repairs, it is essential to observe all country-
specific safety regulations and the safety
precautions outlined in the instruction manual.
8.1 Service Note
A system of service manuals is available for
servicing and repairing STIHL CombiEngines and
CombiTools:
Service Manual Service Manual
Basic Engine Machine Components
4137 4137
Service Manual
CombiTools
Service Manual Service Manual
Basic Engine Machine Components
4140 4140
For each CombiEngine there is a service manual for
the basic engine and a service manual for the
machine components.
The chapters "Servicing the Carburetor",
"Troubleshooting" and "Standard Repairs“ are
included in the respective service manuals. See
also STIHL Service Training System "Diagnosis“.
The "Carburetors" and "Standard Repairs,
Troubleshooting" handbooks are no longer
necessary.
A separate service manual is available for servicing
and repairing the CombiTools.
This means that three service manuals are required
for a tool combination consisting of a CombiEngine
and a CombiTool.
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Technical Information 14.2002 Page 11
8.2 Automatic Throttle Cable
Tolerance Adjuster (KM 85 only)
The KM 85 CombiEngine with bike handle is 4
equipped with an automatic throttle cable tolerance
adjuster.
461TI010 BL
STO
2
Remedy (4): Use a suitable tool to push the slide to
the bottom of the slot (position A).
1
461TI008 BL
The throttle cable can now be set correctly by
activating the tolerance adjuster (see above).
The throttle cable is set correctly by pressing down
the trigger interlock (1) and squeezing the throttle 8.3 Tightening Torques
trigger (2). The tightening torques for the CombiEngines and
CombiTools are listed in their respective service
manuals.
A
461TI009 BL
The position of the slide (3) below the trigger
interlock indicates the condition of the throttle cable:
A At bottom of slot: Throttle cable not adjusted
B Not at bottom of slot: Throttle cable adjusted
If the tolerance adjuster is accidentally activated,
e.g. by squeezing the throttle trigger while
unpacking or assembling the unit, the throttle cable
is no longer properly adjusted.
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)m~ge 12 Technical Information 14.2002
8.4 Repair Times
The specified repair times assume that the work is Note: The following table can be used as a
performed by trained personnel in a properly supplement to the STIHL repair times table.
equipped service workshop.
The repair times are given in minutes.
8.4.1 CombiEngines
# Repair procedure KM 55 / KM 85 /
KM 55 R KM 85 R
1 Remove and refit engine 10 20
2 Crankcase, pressure test* 55 110
3 Crankshaft, bearings, pressure 55 110
test*
4 Oil seals, pressure test* 55 70
5 Crankcase leakage test, test run 55 40
6 Cylinder, piston, pressure test* 55 55
7 Ignition system, contact* 10 10
8
9
Fuel supply, tank vent, test run
Manifold or flange, pressure test
10
10
10 Carburetor, check* 25 30
11 Handle and throttle control 10 10
12 Rewind starter, test run 15 15
13 Clutch, test run 20 20
14 Muffler 10 10
15 Air filter 5 5
16 Stop switch, test run 20 10
17 Clutch housing - 25
18 Drive tube 25 25
19 Replace gearhead or bearing 5 5
housing
20 Limit stop or deflector 5 10
21 Drive shaft 10 15
22 Fuel tank 10 5
23 Check compression pressure - -
24 Adjust valve clearance - -
25 Replace crankcase, bottom half - -
26 Replace crankshaft - -
27 Replace cylinder, piston - -
28 Oil supply - -
29 Oil pump, test run - -
* Test run under load
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Technical Information 14.2002 Page 13
8.4.2 CombiTools
# Repair procedure BC- FCB- FCS- FH- FS- HL- HT- KW-
KM KM KM KM KM KM KM KM
1 Clutch housing - - 20 20 20 20
2 Drive tube 15 15 15 15 15 15 15
3 Replace gearhead or bearing 5 5 4
housing 5 5 5 5
4 Limit stop or deflector 5 5 - 10 - -
5 Drive shaft 10 10 15 15 15 15 15
6 Gearbox cover 10 10
7 Spur gear 15 15
8 Connecting rod 15 15
9 Guide screw 5 5
10 Blade 20 20
11 Guide 20 20
12 Pinion - -
13 Needle cage
or deep-groove ball bearing - 20
14
15
Axle
Replace sweeper drum assembly
fo - -
5
16 Replace sweeper belt 10
17 Replace sleeve on drive tube 5
9. Spare Parts
The illustrated parts lists for the KM 55 / KM 55 R
and KM 85 / KM 85 R CombiEngines and
CombiTools will be available for the market launch.
All CombiTools are listed in the parts list for
CombiTools (0452 227 1323).
© 2002 Andreas Stihl AG & Co. Technical Documentation
Waiblingen D1/MTK-na 7591
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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.