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
10.8 Mounting Metal Cutting Attach‐
ments
Keep the leaflet and packaging of the metal cut‐
ting attachment in a safe place.
WARNING
Wear protective gloves to reduce the risk of
direct contact with the sharp cutting edges.
Mount only one metal cutting attachment.
Check direction of rotation of cutting attachment
1
681BA303 KN
2
3
4
5
6
7
8
Cutting attachments 2, 4, 5 and 6 may be moun‐
ted either way round – they must be turned over
regularly to help avoid one-sided wear.
The cutting edges of cutting attachments 1, 3, 7
and 8 must point clockwise.
Direction of rotation is indicated by an arrow on
the inside of the deflector.
8
9
10
11
13
14
0000-GXX-0502-A0
12
► Fit the thrust plate (9).
► Place the cutting attachment (8) on the thrust
plate (9).
Collar (see arrow) must engage the cutting
attachment's mounting hole.
Securing the cutting attachment
► Fit the rider plate (10).
► Block the shaft (11) with the stop pin (12).
► Use the combination wrench (14) to screw the
mounting nut (13) on to the output shaft coun‐
terclockwise and tighten it down firmly.
WARNING
There is a risk of injury if the cutting attachment
works loose. If the mounting nut has become too
loose, fit a new one.
NOTICE
Remove the tool used to block the shaft.
10.9 Removing the Metal Cutting
Attachment
WARNING
Wear protective gloves to reduce the risk of
direct contact with the sharp cutting edges.
► Block the shaft (11) with the stop pin (12).
► Unscrew the mounting nut (13) clockwise.
10 Mounting the Cutting Attachment English
0458-426-8321-B 21