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► Depress the manual fuel pump (1) at least 5

times.

► If the engine is warm: Leave the choke lever

(2) in position  .

► If the engine is at ambient temperature: Push

in the choke lever (2) at the edge and set it in
position  .

0000-GXX-4729-A0 

NOTICE

■ The brushcutter can be damaged if you press

it into the ground with your foot or knee .

► Press the brushcutter against the ground

with your left hand. Do not stand or kneel

on the shaft.

► Press the brushcutter against the ground with

your left hand.

► Pull the starter grip slowly with your right hand

until you feel it engage.

► Pull the starter grip quickly and allow the

starter rope to rewind several times until the

engine runs.

► If the choke lever (2) is in the position  :

briefly press the throttle lever lockout (3) and

the throttle trigger (4).
The choke lever (2) springs to position  . The

engine runs at idling speed.

► If the engine is cold: Warm up engine by

briefly opening the throttle.

► If the cutting attachment rotates when the

engine is idling: Rectify the malfunction.

Throttle cable adjustment is not correct.

► If the engine does not start: Move the choke

lever (2) to position   and try again to start

the engine.

► If the engine is flooded: Try to start the engine

again with the choke lever (2) in the   position.

9.2

Shut off the engine

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► Release the throttle trigger (1) and throttle trig‐

ger lockout (2).

The cutting attachment comes to a standstill.

► Depress the stop switch (3).

The engine stops.

► If the engine does not stop:

► Move the choke lever to position  .

The engine stops.

► Do not use your trimmer and contact a

STIHL servicing dealer for assistance.

There is a malfunction in the brushcutter.

As long as the stop switch is pressed, the ignition

is switched off. After the stop switch has been

released again, the ignition is switched on again.

10 Testing the Trimmer

10.1

Checking the controls

Throttle trigger lockout and throttle trigger

► Shut off the engine.

► Attempt to pull the trigger without depressing

the lockout lever.

► If the trigger can be pulled: Do not use your

trimmer and contact your STIHL dealer for

assistance.

The throttle trigger lockout is defective.

► Press the throttle trigger lockout and keep

pressed.

► Depress the throttle trigger.

► Release the throttle trigger and throttle trigger

lockout.

► If the trigger or trigger lockout is stiff or does

not spring back to the idle position: Do not use

your trimmer and contact your STIHL dealer

for assistance.

Trigger or trigger lockout is faulty.

Throttle cable adjustment

► Start the engine.

► Attempt to pull the trigger without depressing

the lockout lever.

10 Testing the Trimmer

English

0458-844-0101-A

15

Summary of Contents for FS 491 C-M

Page 1: ...STIHL FS 491 C M Instruction Manual 2 23...

Page 2: ...themselves to a sus tainable and responsible handling of natural resources This user manual is intended to help you use your STIHL product safely and in an environmentally friendly manner over a long...

Page 3: ...er 14 Throttle trigger Controls the engine speed 15 Throttle trigger lockout Unlocks the throttle trigger 16 Stop switch Shuts off the engine 17 Wing screw The wing screw secures the handlebar to the...

Page 4: ...otects the user from contact with metal cutting attachments 3 3 Icons Meanings of symbols that may be on the trimmer and the deflector This icon denotes the fuel tank This symbol denotes the manual fu...

Page 5: ...des Do not use this deflector for circular saw blades 4 1 4 Guard for shredder blades Meanings of warning signs and labels on the deflector for shredder blades Do not sse this deflector for shredder b...

Page 6: ...ous injury to the user Tie up and confine long hair above your shoulders Objects can be thrown at high speed during operation This may result in injury to the user Wear close fitting safety glasses Su...

Page 7: ...t a STIHL dealer for assistance Close the fuel tank cap If the brushcutter is dirty Clean the brush cutter Never attempt to modify your brushcutter Exception Mounting one of the combina tions of cutti...

Page 8: ...r fatally injured and property may be damaged Protect fuel mixture and gasoline from heat and fire Do not spill fuel mixture or gasoline If fuel is spilled Wipe up fuel with a cloth and do not attempt...

Page 9: ...immer Operate the trimmer alone Keep the cutting attachment close to the ground Watch out for obstacles Work standing on the ground and keep your balance If you start feeling fatigue Take a break If y...

Page 10: ...or in the direction of the user black arrow The user can lose control of the trim mer This can result in serious or fatal injuries Hold the trimmer firmly with both hands Use the working techniques de...

Page 11: ...y to the user Wear work gloves made from resist ant material 5 Preparing Trimmer for Operation 5 1 Preparing the Brushcutter for Operation The following steps must be performed before commencing work...

Page 12: ...ar as stop and hold it depressed Rotate the mowing head until the stop pin engages in position The shaft is now blocked Unscrew the mowing head clockwise Remove the thrust plate Remove stop pin 6 4 Re...

Page 13: ...nsert the stop pin in the bore up to the limit stop and hold it depressed Rotate the metal cutting attachment clockwise until the stop pin engages in position The shaft is now blocked Unscrew the moun...

Page 14: ...Two stroke engine oil 1 l gasoline 60 ml Two stroke engine oil 3 l gasoline 100 ml Two stroke engine oil 5 l gasoline Pour two stroke engine oil into a clean approved fuel canister first and then add...

Page 15: ...again with the choke lever 2 in the position 9 2 Shut off the engine 2 3 1 0000097402_001 Release the throttle trigger 1 and throttle trig ger lockout 2 The cutting attachment comes to a standstill De...

Page 16: ...engine housing and an air filter with plastic webbing The accessories and User Manual are available from a STIHL servicing dealer 11 2 Summer Operation The shutter must be set to summer mode when wor...

Page 17: ...ceably C Release the throttle trigger The engine runs at idling speed The brushcut ter is calibrated and ready for use Shut off the engine 11 4 Holding and Controlling the Brushcutter 1 2 0000097031 0...

Page 18: ...ing attachment If a metal cutting attachment is mounted Fit the matching transport guard 13 Transporting 13 1 Transporting the Trimmer Shut off the engine If a metal cutting attachment is mounted Fit...

Page 19: ...grease can be seen on the end of the screw plug 2 Screw in the tube of STIHL gear lubri cant 1 Squeeze 5 g of STIHL gear grease into the gear housing Unscrew the tube of STIHL gear lubri cant 1 Refit...

Page 20: ...uel in the fuel tank The pickup body is not located in the right place Contact a STIHL servicing dealer 18 2 Replacing air filter The air filter cannot be cleaned The air filter must be replaced if it...

Page 21: ...A Sound power level Lw measured according to ISO 22868 112 dB A Vibration level ahv measured according to ISO 22867 Control handle 2 8 m s Left handle 3 4 m s For information on compliance with Employ...

Page 22: ...spare parts and accessories accordingly STIHL cannot warrant for the use of those parts Original STIHL spare parts and original STIHL accessories are available from STIHL dealers 22 Disposal 22 1 Disp...

Page 23: ...hi nery Safety Regulations 2008 Electromagnetic Compatibility Regulations 2016 and Noise Emis sion in the Environment by Equipment for use Outdoors Regulations 2001 and has been manu factured in compl...

Page 24: ...www stihl com 04588440101A 04588440101A 0458 844 0101 A 0458 844 0101 A...

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