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
–
Mounting hardware for cutting attachments
(rider plate, nut, etc.)
–
Deflectors for cutting attachments
–
Clutch
–
Filters (air, fuel)
–
Rewind starter
–
Spark plug
–
Antivibration elements
29 Main Parts
3
2
10
9
10
8
9
11
13
12
14
0000-GXX-0514-A0
15
20
19
15
8
1
4
5
6
#
7
16
17
18
14
21
21
1 Tank Cap
2 Carburetor Adjusting Screw
3 Starter Grip
4 Manual Fuel Pump
5 Cover
6 Muffler with Spark Arresting Screen
7 Machine Support
8 Throttle Trigger
9 Stop Switch
10 Throttle Trigger Lockout
11 Bike Handle
12 Handle Support
13 Wing Screw
14 Throttle Cable Retainer
15 Carrying Ring
16 Choke Knob
17 Air Filter Cover
18 Fuel Tank
19 Loop Handle
20 Barrier Bar (country specific)
21 Drive Tube
# Serial Number
5
5
8
1
2
6
4
7
2
3
1
1
9
1
002BA644 KN
4
1 Drive tube
2 Mowing head
3 Deflector for mowing heads only
4 Line limiting blade
5 Deflector for all mowing attachments
6 Skirt for mowing heads
7 Metal mowing attachment
8 Circular saw blade
9 Limit stop for circular saw blades only
30 Specifications
30.1 Engine
Single cylinder four-stroke engine with mixture
lubrication
Displacement:
28.4 cc
Bore: 38 mm
Stroke: 25 mm
Engine power to ISO 8893: 0.95 kW (1.3 bhp) at
7,000 rpm
Idle speed: 2,800 rpm
Cut-off speed (rated): 9,500 rpm
Max. output shaft speed
(cutting attachment):
7,150 rpm
Valve clearance
Inlet valve: 0.10 mm
Exhaust valve: 0.10 mm
29 Main Parts English
0458-426-8321-B 37