Technical Information · issue 37 of 2009
New STIHL FC 70 C Power Edger
IssueTI 37/2009
Full text
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STIH)
Technical Information 37.2009
New STIHL FC 70 C Power Edger – Series 4144
Contents
1. Technical Description
2. Specifications
3. Blades
4. Special Accessories
5. Servicing Accessories
6. Spare Parts
7. Repairs
The new, lightweight STIHL FC 70 RC power edger
is characterized by professonal styling and a long
service life.
The power edger is suitable for sharp-contoured
edging of lawns and cuts almost all types of grass
and weeds.
TI_37_2009_30_01_01.fm englisch / English
)m~ge 2 Technical Information 37.2009
1. Technical Description 1.3 Engine, carburetor
The FC 70 C engine with stratified scavenging and
1.1 Function of stop switch and the ignition carburetor with baffle plate are the same as those in
the FC 56.
See TI 39.2008 for further information on the engine
1 and carburetor.
1.4 Shroud
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The stop switch (1) is normally in the Run position:
The ignition is switched on – the engine is ready to
start. The ignition is switched off when the stop
switch is moved to the 0 position. The ignition is
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switched on again automatically after the engine
stops.
The shroud of the FC 70 C is designed in such a
1.2 Choke lever way that the spark plug boot (arrow) is adequately
protected without the need for an additional
protective cap.
Two holes (arrows) in the shroud enable the muffler
mounting screws to be retightened without
removing the shroud.
1
546TI001 KN
To start the engine, press in the choke lever (1) and
turn it to g (cold start) or < (warm start). After the
engine starts, the choke lever returns automatically
to F (normal run position) as soon as the interlock
lever and throttle trigger are operated. It is not
necessary for the user to move the choke lever to F
(normal run position).
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Technical Information 37.2009 Page 3
2. Specifications
2.1 Engine
Single cylinder two-stroke engine
Displacement: 1.66 cu. in. (27.2 cc)
Bore: 1.34 in (34 mm)
Stroke: 1.18 in (30 mm)
Engine power to ISO 8893: 1.2 bhp (0.9 kW)
Torque: 0.96 lb.ft. (1.30 Nm)
Idle speed: 2,800 rpm
Clutch engages at: 4,200 rpm
Cut-off speed
(rated): 10,000 rpm
Max. output shaft
speed (blade): 8,100 rpm
Rewind starter: Dual pawl system
– Starter rope: 0.106 in diameter, 39.8 in long
(2.7 mm diameter, 1010 mm long)
– Spare rope: 1.25 – 2.25 turns
2.2 Fuel System
Carburetor: All position diaphragm carburetor with integral fuel pump.
Setting data
High speed screw H (basis setting)
– without limiter cap, service shop: Open 1 1/2 turns
– with limiter cap, user: 3/4 turn counterclockwise
Low speed screw L
(standard setting): 3/4 turn counterclockwise
Idle speed screw LA: as required; the blade must not turn
Fuel tank capacity: 11.5 fl. oz. (0.34 l)
Fuel mixture: See instruction manual
Mix ratio: See instruction manual
2.3 Ignition System
Ignition module: Electronic magneto ignition
Spark plug (resistor NGK CMR 6 H
type):
Electrode gap: 0.02 in (0.5 mm)
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2.4 Dimensions
Overall length without blade: 67.0 in (1700 mm)
2.5 Weight
Dry, with deflector and blade
FC 70 C: 13.9 lbs (6.3 kg)
2.6 Gearhead
Gear ratio: 1:1.235
Lubricant: STIHL gear lubricant for brushcutters
Initial capacity: 0.5 oz (15 g)
Re-lubrication: 0.2 oz (5 g)
3. Blades
For safety reasons only the following STIHL blades
are approved for the new power edger:
1 2
2
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Item No. Description Length x Thickness Designation Part No.
1 Blade 8 in x 0.1 in 4133 / 01 4133 713 4101
(200 x 2.4 mm)
2 Blade 8 in x 0.15 in 4133 / 02 4133 713 4102
(200 x 3.8 mm)
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Technical Information 37.2009 Page 5
4. Special Accessories
4.1 General
Description Part No. Application
Skirt 4137 716 3200 Deflector
Deflector 4137 713 4503
Depth wheel 4133 712 1000
STIHL gear lubricant for brushcutters Gearhead
– 3 oz (80 g) tube 0781 120 1117
– 8 oz (225 g) tube 0781 120 1118
4.2 Blade
Description Length x Thickness Designation Part No.
Blade 8 in x 0.1 in 4133 / 01 4133 713 4101
(200 x 2.4 mm)
Blade 8 in x 0.15 in 4133 / 02 4133 713 4102 Special accessory
(200 x 3.8 mm)
4.3 Servicing aids
Description Part No. Application
STIHL balancer 5910 850 2600 Balancing the blade
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5. Servicing Accessories
5.1 Special servicing tools
Special servicing tools are listed in the STIHL Series
4144 Powerhead, STIHL Series 4144 Components
and STIHL KombiTools shop manuals.
No new or additional special tools are required for
the FC 70 C.
5.2 Servicing aids
Description Part No. Application
Starter rope, 39.8 in (1010 mm) 4137 195 8200 Rewind starter
Carburetor parts kit 4241 007 1002 Zama C1M-S145
Zama C1M-S146 (California only)
STIHL gear lubricant for Shaft in drive tube
hedge trimmers
– 3 oz (80 g) tube 0781 120 1109
– 8 oz (225 g) tube 0781 120 1110
STIHL gear lubricant for Gearhead
brushcutters
– 3 oz (80 g) tube 0781 120 1117
– 8 oz (225 g) tube 0781 120 1118
STIHL assembly paste Paste contains molybdenum sulfide and
– 1.8 oz (50 g) tube 0781 130 1014 graphite; for lubricaton between crankshaft
stub and clutch drum
Standard commercial solvent-based Cleaning crankshaft stubs and flywheel taper
degreasant containing no chlorinated or (see TI 25.2005)
halogenated hydrocarbons
6. Spare Parts
Spare parts documentation available for market
launch of FC 70 C.
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Technical Information 37.2009 Page 7
7. Repairs
If the machine is started in the course of repairs, it is
essential to observe all country-specific safety
regulations and the safety precautions in the
instruction manual.
7.1 Service manuals
The following service manuals can be used for
repair procedures on the FC 70 C:
For the engine, controls and drive tube For the gearhead
of the FC 70 C (4144 powerhead) of the FC 70 C
Service manual Service manual Service manual
Series 4144 Powerhead Series 4144 Components KombiTools
0455 938 0123 0455 545 0123 0455 227 0123
7.2 Tightening torques 7.4 Serial number
The tightening torques are also listed in the above
service manuals.
Also see chapter b 7.5.3
7.3 Starting after a long period of storage
Problems with starting may be experienced if the
machine is stored for several months at
temperatures below 41 °F (5 °C).
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In such a case, press the manual fuel pump several
times to prime the carburetor. Then wait a few
minutes before attempting to start the engine.
The serial number is applied to the underside of the
Recommendation:
engine housing in the two positions shown in the
Before storing for a prolonged period, always run
illustration.
the engine until the carburetor is dry. This helps
prevent the carburetor diaphragms sticking together
– see also chapter on "Storing the Machine" in the
instruction manual.
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7.5 Service Notes Note on OH 723 press fluid
OH 723 press fluid produces a lubricating film which
7.5.1 Hose barb connectors on carburetor
simplifies assembly. The lubricant evaporates after
a short period – the hose is then tight.
Never use fuel, oil or grease as a lubricant for this
purpose. Fuel, oil and grease do not evaporate – the
hose may loosen or become detached.
7.5.2 Piston
The piston has two piston rings.
7.5.3 Control handle
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The carburetor has two hose barb connectors
(arrows) for the fuel hoses. Observe the following
procedures to guarantee the tightness of the fuel
system:
. To avoid damaging hose barb connectors, pull
off and push on fuel hoses in line with the
connector by hand where possible – do not use 1
sharp-edged pliers, screwdrivers, etc. and do 1
not cut open fuel hoses with a knife or similar
tools.
. Do not re-use fuel hoses after removal. Always
replace with new hoses – fuel hoses may be
over-stretched during removal.
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. Fit new fuel hoses dry or with the aid of OH 723
press fluid – 0781 957 9000. Other press fluids 1
are not approved and may result in damage to
the fuel hoses. The control is screwed to the engine housing and
. Coat the ends of the hose and the connectors shroud and can be replaced.
with OH 723 press fluid and push the new hoses The screws (1) must be tightened to a torque of
onto the hose barb connectors. 2.6 lb.ft. (3.5 Nm).
7.6 Repair Times
The repair times table for the FC 70 C is the same
as that for the FC 56, see TI 39.2008.
© ANDREAS STIHL AG & Co. KG, 2009 Technical Documentation
D1/MTK-ke
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