Instruction Manual
Table Of Contents
- STIHL FS 91, 91 R
- 1 Guide to Using this Manual
- 2 Safety Precautions and Working Techniques
- 2.1 Clothing and equipment
- 2.2 Transporting the machine
- 2.3 Refueling
- 2.4 Before starting
- 2.5 Starting the engine
- 2.6 Holding and guiding the machine
- 2.7 While working
- 2.8 Using mowing heads
- 2.9 When using metal cutting attachments
- 2.10 Vibrations
- 2.11 Maintenance and Repairs
- 2.12 Symbols on Deflectors
- 2.13 Shoulder Strap/Harness
- 2.14 Mowing Head with Nylon Line
- 2.15 STIHL Polycut Mowing Head with Polymer Blades
- 2.16 Risk of Kickout (Blade Thrust) with Metal Cutting Attachments
- 2.17 Grass Cutting Blade
- 2.18 Brush Knife
- 2.19 Circular Saw Blade
- 3 Approved Combinations of Cutting Attachment, Deflector, Handle and Harness
- 4 Approved Power Tool Attachments
- 5 Mounting the Bike Handle
- 6 Mounting the Loop Handle
- 7 Adjusting the Throttle Cable
- 8 Fitting the Carrying Ring
- 9 Mounting the deflector
- 10 Mounting the Cutting Attachment
- 10.1 Placing power tool on the ground
- 10.2 Mounting Hardware for Cutting Attachments
- 10.3 Blocking the Shaft
- 10.4 Removing the Mounting Hardware
- 10.5 Mounting the Cutting Attachment
- 10.6 Fitting Mowing Head with Screw Mounting
- 10.7 Remove the mowing head.
- 10.8 Mounting Metal Cutting Attachments
- 10.9 Removing the Metal Cutting Attachment
- 11 Fuel
- 12 Fueling
- 13 Fitting the Harness
- 14 Balancing the Machine
- 15 Starting / Stopping the Engine
- 16 Transporting the Unit
- 17 Operating Instructions
- 18 Replacing the Air Filter
- 19 Adjusting the Carburetor
- 20 Spark Arresting Screen in Muffler
- 21 Spark Plug
- 22 Engine Running Behavior
- 23 Lubricating the Gearbox
- 24 Storing the Machine
- 25 Sharpening Metal Cutting Blades
- 26 Maintaining the Mowing Head
- 27 Maintenance and Care
- 28 Minimize Wear and Avoid Damage
- 29 Main Parts
- 30 Specifications
- 31 Maintenance and Repairs
- 32 Disposal
- 33 EC Declaration of Conformity
15.2.1 Cranking
0000-GXX-0479-A0
0000-GXX-0480-A0
► Place the unit on the ground: It must rest
securely on the engine support and the deflec‐
tor.
► If fitted: Remove the transport guard from the
cutting attachment.
To reduce the risk of accidents, check that the
cutting attachment is not touching the ground of
any other obstacles.
► Make sure you have a firm footing, either
standing, stooping or kneeling.
► Hold the unit firmly on the ground with your left
hand and press down – do not touch the throt‐
tle trigger or lockout lever – your thumb should
be under the fan housing.
NOTICE
Do not stand or kneel on the drive tube.
0000-GXX-0481-A0
► Hold the starter grip with your right hand.
► Pull the starter grip slowly until you feel it
engage and then give it a brisk strong pull.
NOTICE
Do not pull out the starter rope all the way – it
might otherwise break.
► Do not let the starter grip snap back. Guide it
slowly back into the housing so that the starter
rope can rewind properly.
► Continue cranking until the engine runs.
15.2.2 As soon as the engine runs
002BA664 KN
► Press down the throttle trigger lockout and
open the throttle – the choke knob moves to
the run position F. After a cold start, warm up
the engine by opening the throttle several
times.
WARNING
There is a risk of injury if the cutting attachment
runs when the engine is idling. Adjust the carbu‐
retor so that the cutting attachment does not run
when the engine is idling – see “Adjusting the
Carburetor”.
Your machine is now ready for operation.
15.3 Stopping the Engine
► Depress the momentary contact stop switch –
the engine stops – release the stop switch – it
springs back to the run position.
15 Starting / Stopping the Engine English
0458-426-8321-B 27