Technical Information · issue 2 of 2007
New STIHL FS 310 Clearing Saw
IssueTI 2/2007
Full text
Page 1 of 10
STIH)
Technical Information 02.2007
New STIHL FS 310 Clearing Saw – Series 4180
Contents
1. Technical Description
2. Specifications
3. Cutting Tools
4. Accessories
5. Service Accessories
6. Service Note
7. Spare Parts
1. Technical Description
The new STIHL FS 310 clearing saw with
4-MIX® engine is the latest addition to the range of
clearing saws.
The range of applications will be the same as that
for model FS 350.
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)m~ge 2 Technical Information 02.2007
1.1 STIHL 4-MIX® Engine
The 4-MIX® incorporates a patented STIHL
lubrication system. Engine lubrication is provided by
the fuel mixture of gasoline and engine oil.
Compared to a conventional four-stroke gasoline
engine, the 4-MIX® engine has no separate oil
supply in the crankcase.
The STIHL 4-MIX® engine uses the same 50:1
fuel/oil mixture as all other STIHL two-stroke
273TI003 KN
engines.
The benefits of this new concept are:
The toolless clamp enables simple adjustment of
. Standard fuel/oil mix the bike handle to suit individual requirements. The
. Efficient fuel consumption handlebar can be swivelled parallel to the drive tube
and the handles folded down to save space during
. Operates in all positions
transportation or when storing the unit.
. Good acceleration
. Compact construction and design
. Favorable power-to-weight ratio 1.3 Fuel Tank and Filler Cap
. Maintenance and service-friendly The large, translucent fuel tank allows the operator
to check the fuel level from the outside at any time.
. Reduced starting effort
1.2 Handle System with 4-Point
Antivibration System
273TI002 KN
The toolless filler cap with a hinged flap simplifies
opening and closing for easier refueling.
The 4-point antivibration system dampens
vibrations from the engine and cutting tool.
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Technical Information 02.2007 Page 3
2. Specifications 2.3 Fuel System
The STIHL 4-MIX® engine features gasoline-oil
2.1 Powerhead lubrication and must be run on a 50:1 fuel/oil
STIHL single cylinder 4-MIX® engine mixture.
Displacement: 2.22 cu.in (36,3 cm3) Fuel: Refer to the
Bore: 1.69 in (43 mm) instruction manual
Stroke: 0.98 in (25 mm) Fuel tank capacity: 24.0 fl.oz (0,71 l)
Power per to 8893: 1,9 bhp (1,4 kW) at
Carburetor:
8500 rpm
All position diaphragm carburetor with integral fuel
Torque: 1.25 ft./lb (1,70 Nm) at pump
6500 rpm
Standard setting with limiter caps
Idle speed: 2,800 rpm
Rewind starter: Single pawl system Low speed screw L: Rotates 3/4 turn
Starter rope: dia. 0.120 in, 33.5 in (no further than stop)
long (dia. 3.0 mm, 850
mm long) High speed screw H: Rotates 3/4 turn
(no further than stop)
Clutch
– clutch engages at
approximately: 3,700 rpm Basic setting without limit caps from shut-off stop
Cut-off speed without position
cutting tool (electronic
Low speed screw L: Open 2 1/2 turns
speed governor at
approximately): 10,500 +/- 200 rpm
High speed screw H: Open 4 turns
Valve clearance
Inlet: 0.004 in (0,10 mm) 2.4 Gearhead
Exhaust: 0.004 in (0,10 mm)
Gear ratio: 1:1.4
2.2 Ignition System Lubrication: STIHL gear lubricant for
brushcutters
Ignition module: with integrated electronic
(0781 120 1117)
speed governor
Initial filling: 0.52 oz (15 g)
Spark plug (radio
suppressed): NGK CMR 6 H Re-lubrication: up to 0.18 oz (5 g)
Electrode gap: 0.020 in (0,5 mm)
2.5 Weight
Dry, without cutting tool and deflector
FS 310: 15.9 lb (7,2 kg)
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3. Cutting Tools
The following cutting tools are approved:
1 STIHL SuperCut™ 40-2
mowing head 4003 710 2142 1 2
2 STIHL AutoCut® 40-2
mowing head 4003 710 2189
3 STIHL TrimCut™ 40-2
mowing head 4003 710 2193 3
4 STIHL PolyCut™ 40-3
4
mowing head 4111 710 2190
5 Grass cutting blade 230-4 4000 713 3801
6 Grass cutting blade 255-8 4000 713 3802 5 6
7 Circular saw blade 200-22
(chisel tooth) 4119 713 4200
8 Circular saw blade 200-44
(scratcher tooth) 4000 713 4200
9 Brush knife 300-3 4119 713 4100 7 8
273TI020 KN
All the cutting tools listed above must be used with
the recommended deflector and harness (see
"Cutting Tools" catalog).
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Technical Information 02.2007 Page 5
4. Accessories
Part Name Part No. Application
Transport guard for 4116 790 3901 Brush knife Special 300-3
metal cutting tools
4119 790 3906 Grass cutting blade 230-4, 255-8,
4119 790 3901 Circular saw blade 200-44 (scratcher tooth), 200-22 (chisel
tooth)
Nylon line for mowing see “Cutting Tools” catalog
heads
Starter rope (3mmx200FT 0000 930 2211 Rewind starter
Roll)
STIHL gear lubricant for Gearhead
brushcutters
– 3 oz (80 g) tube 0781 120 1117
– 8 oz (225 g) tube 0781 120 1118
5. Service Accessories
5.1 Special Servicing Tools
Part Name Part No. Application
Assembly drift 1110 893 4700 Removing clutch
Press sleeve 1120 893 2400 Removing bearing from clutch drum
Press sleeve 1108 893 2405 Installing bearing in clutch drum
Other special servicing tools are listed in the following service manuals:
Assembly Service Manual
Powerhead, control handle STIHL Series 4180 Powerhead
Handle, drive tube, gearhead
and deflector STIHL FS 120, 200, 300, 350, 400, 450, FR 350, 450
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5.2 Servicing Aids
Part Name Part No. Application
Valve clearance adjusting kit 4180 007 1005 Checking, adjusting valve clearance
Set of gaskets 4180 007 1015 Engine
Carburetor parts kit 4180 007 1061 Carburetor
Lubricating grease
(8 oz (225 g) tube) 0781 120 1111 Oil seals
Press fluid (100 ml bottle) 0781 957 9000 Rubber elements of AV system
Dirko HT sealant, red 0783 830 2000 Sealing engine pan/cylinder, cylinder/cam gear
(3.2 oz (90 g) tube) cover
Standard commercial, solvent- Cleaning crankshaft
based degreaser (see TI 25.2005)
6. Service Note
If the machine is to be operated during repair
please refer to the unit instruction manual
regarding proper safety and operation.
6.1 Servicing Antivibration System
6.1.1 Removing
. Remove the control handle and bike handle.
273TI018 KN
1
. Remove the retainers from the AV housing
and remove the throttle cable.
2
273TI005 KN
. Push snap hooks (arrows) inwards and lift away
the cover (1).
273TI006 KN
. Loosen screw (1) and slide the support (2)
forwards.
. Remove the rubber buffers (3).
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Technical Information 02.2007 Page 7
1
b
a
a
b
273TI009 KN
273TI007 KN
1
. Slide the AV housing forwards. . Fit the rubber buffers (1) in the AV housing.
. Remove rubber buffers from fan housing. . Coat the buffer bore (a) and peg (b) with press
fluid.
. Inspect rubber buffers for damage and replace if
necessary. . Install support in the direction of the AV housing
so the pegs (b) locate in the buffer bores (a).
6.1.2 Installing
1
b
a
a a
273TI010 KN
a
273TI008 KN
b
1
. Install support in the direction of the AV housing
. Fit the rubber buffers (1) in the AV housing.
until the AV gap ’a’ is 0.20 in (0.5 mm).
. Coat the buffer bore (a) and peg (b) with press
. Tighten down the screw (1) to a torque of
fluid.
3.32 ft./lb (4,5 Nm).
. Install AV housing in the direction of the engine
. Fit the throttle cable and clip the retainers in
so the pegs (b) locate in the buffer bores (a).
position.
. Fit the cover and push it home until the snap
hooks fully engage.
. Install bike and control handle.
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6.2 Servicing the Clutch Drum and Bearing
6.2.1 Removing
. Remove the antivibration system.
273TI014 KN
. Remove the circlip from the fan housing.
1 273TI011 KN
1
. Loosen the screw (1).
. Remove powerhead from drive tube.
273TI019 KN
2 3
. Use press sleeve (1) 1120 893 2400 to remove
the ball bearing from the fan housing.
6.2.2 Installing
273TI012KN
2
. Remove screws (2) and the fan housing. 1
. Remove the circlip (3) from the clutch drum.
1
273TI015 KN
. Use the press sleeve (1) 1110 893 2405 to
press the ball bearing into the fan housing.
273TI013 KN
. Fit the circlip in the fan housing.
. Use assembly drift (1) 1110 893 4700 to press
the clutch drum from the ball bearing.
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Technical Information 02.2007 Page 9
6.3 Checking Valve Clearance
1 Check valve clearance after the first 139 hours of
operation and adjust if necessary. Check and adjust
valve clearance only when the engine is cold, using
the “Valve clearance adjusting kit“ 4180 007 1005,
consisting of feeler gauge, sealing ring and gasket.
6.4 Leakage Test
273TI016 KN
Defective oil, and gaskets or cracks in castings may
allow extra air to enter the engine and lean out the
fuel, oil and air mixture.
. Use the assembly drift (1) 1110 893 4700 to
press the clutch drum into the ball bearing. This may upset the lubricating process and cause
unit failure.
. Fit the circlip on the clutch drum.
The engine should be checked for leaks with the
. Install the fan housing to the engine.
STIHL pressure vacuum pump.
. Install the powerhead onto the drive tube
properly index.
. Tighten down the fan housing screws to a torque
of 6.23 ft./lb (8,5 Nm).
. Fit the antivibration system – adjust the AV gap
(see 6.1.2 Installing).
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6.5 Service Note and Tightening Torques .
The following service manuals are available for Reparaturvorgang FS 310
servicing procedures and tightening torques: 1 Replace short block. 50
2 Replace crankcase, crankcase
Assembly Service Manual
gasket or re-seal crankcase. Includes
Powerhead, control STIHL Series 4180 air leak test. 100
handle Powerhead 3 Replace crankshaft main bearing(s).
Handle, drive tube, STIHL FS 120, 200, 300, Includes air leak test. 100
gearhead and deflector 350, 400, 450, 4 Replace crankshaft seal(s). Includes
FR 350, 450 air leak test. 70
5 Perform engine air leak test. 25
6.6 Repair Times
6 Replace cylinder and/or piston.
The specified repair times assume that the work is Includes air leak test and repair of
performed by trained personnel in a properly components causing failure. 100
equipped service workshop. 7 Replace ignition module or flywheel.
Repair times are quoted in minutes. Includes stop circuit test. 25
This table for the FS 310 can be added to the STIHL 8 Replace fuel tank line, tank vent, or
repair times table. fuel pick-up body. 15
9 Replace intake manifold or intake
6.7 Serial Number flange. 20
10 Repair or replace carburetor.
Includes fuel system testing. 30
11 Repair throttle control 25
12 Repair or replace rewind starter 15
13 Repair or replace clutch, clutch shoes
or clutch springs 30
14 Replace muffler 15
15 Replace air filter or filter housing 15
16 Repair or replace stop switch.
273TI017 KN
Includes circuit testing 20
17 Replace clutch housing. 20
18 Replace drive shaft and/or drive tube. 20
The serial number is located on the side of the
19 Replace bearing liner in drive tube. 20
engine pan as shown in the illustration.
20 Replace limit stop or deflector. 15
21 Replace gearbox assembly. 15
7. Spare Parts
22 Replace fuel tank. 15
Dedicated parts documentation is available for the 23 Adjust valve clearance. 15
new machine.
24 Clean exhaust valve with STIHL de-
carbonizing liquid. Includes leak-
down test. 25
25 Replace intake or exhaust valve.
Includes. leak-down test. 100
26 Replace gears and/or bearings in
gearbox. 25
40 Miscellaneous repairs and other
repairs not listed. 15
45 Handling allowance only-no labor. 10
50 No labor. 0
© ANDREAS STIHL AG & Co. KG, 2007 Technical Documentation
D1/MTK-bl
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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.