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► Take breaks.

► If signs of a circulatory disturbance occur:

Consult a doctor.

■ If the cutting attachment makes contact with a

foreign object during operation, the object or

parts of it may be thrown at high speed. Per‐

sons may be injured or property damaged.

► Remove foreign objects from the working

area.

■ If the rotating cutting attachment makes con‐

tact with a hard object, sparks may occur and

the cutting attachment may be damaged.

Sparks can cause fires in a flammable envi‐

ronment. Persons may be seriously or fatally

injured and property may be damaged.

► Do not use in a flammable environment.

► Make sure the cutting attachment is in a

safe condition.

■ Note that the cutting attachment continues to

rotate for a short period after you release the

trigger. They may cause serious injury to per‐

sons.

► Wait until the cutting attachment comes to a

complete stop.

■ In an emergency, the user may start to panic

and forget to take off the carrying system. This

may result in serious injury to the user.

► Practice taking off the carrying system.

4.9

Reactive Forces

0000-GXX-3025-A1

Kickout can be caused for the following reasons:

The shaded area or the black area of the rotat‐

ing metal cutting attachment comes into con‐

tact with a solid object and is suddenly braked.

The rotating metal cutting attachment gets

pinched in the cut.

The risk of kickout is greatest in the black area.

WARNING

■ These situations can abruptly decelerate or

stop rotation of the cutting attachment and

cause the cutting attachment to be thrown to

the right 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 described in

this instruction manual.

► Do not use the black area for cutting.

► Use a combination of cutting attachment,

deflector and carrying system recommen‐

ded in this instruction manual.

► Sharpen the metal cutting attachment cor‐

rectly.

► Cut with the motor running at full speed.

4.10

Transporting

WARNING

■ The gearbox can get hot during operation.

There is a risk of burn injuries.

► Do not touch a hot gearbox.

■ The trimmer may turn over or shift during

transport. This may result in personal injuries

and damage to property.

► Shut off the engine.

► If a metal cutting attachment is mounted: Fit

the transport guard.

► Secure the trimmer with lashing straps or a

net to prevent it turning over and moving.

■ The muffler and engine may be hot after a

period of operation. There is a risk of burn

injuries.

► Carry the trimmer properly balanced by the

drive tube with the cutting attachment

behind you.

4.11

Storing

WARNING

■ Children are not aware of and cannot assess

the dangers of a trimmer and can be seriously

injured.

► Shut off the engine.

► If a metal cutting attachment is mounted: Fit

the transport guard.

► Store the trimmer out of the reach of chil‐

dren.

■ Dampness can corrode the electrical contacts

on the trimmer and metal components. This

can damage the trimmer.

► Store the trimmer in a clean and dry condi‐

tion.

4.12

Cleaning, Maintenance and

Repair

WARNING

■ The cutting attachment can start rotating unin‐

tentionally if the engine is running during

cleaning, maintenance or repair operations.

English

4 Safety Precautions

10

0458-844-0101-A

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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