Stihl FS 80 Manual
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Stihl FS 80 Manual

Stihl FS 80 Manual

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Contents
Working Techniques ......................... 3
Handle and Harness ....................... 18
(CombiTools) .................................. 20
Split Drive Tube .............................. 21
Mounting the Bike Handle .............. 21
Mounting the Loop Handle ............. 23
Fitting the Carrying Eye* ................ 24
Mounting the Deflector ................... 25
Fuel ................................................ 30
Fueling ............................................ 31
Fitting the Harness ......................... 31
Balancing the Brushcutter .............. 32
the Engine ...................................... 33
Operating Instructions .................... 36
Cleaning the Air Filter ..................... 36
Motor Management ........................ 37
Adjusting the Carburetor ................ 37
in Muffler ......................................... 39
Checking the Spark Plug ................ 39
Lubricating the Gearbox ................. 40
and Rewind Spring ......................... 40
Storing the Machine ........................ 43
Replacing the Nylon Line ............... 44
*
see "Guide to Using this Manual"
STIHl
FS 80, FS 85, FS 85 T
Maintenance Chart ......................... 48
Parts and Controls ......................... 49
Specifications ................................. 52
Special Accessories ....................... 53
Maintenance and Repairs .............. 54
STIHL Incorporated Federal
and California Emission Control
Warranty Statement ........................ 55
english / USA
Allow only persons who understand this
manual to operate your brushcutter.
To receive maximum performance and
satisfaction from your STIHL brush-
cutter, it is important that you read and
understand the maintenance and safety
precautions, starting on page 3, before
using your brushcutter.
Contact your STIHL dealer or the STIHL
distributor for your area if you do not
understand any of the instructions in this
manual.
!
Warning!
Because a brushcutter is a high-speed
cutting tool some special safety pre-
cautions must be observed to reduce
the risk of personal injury.
Careless or improper use may cause
serious or even fatal injury. Make sure
your unit is equipped with the proper
deflector, handle and harness for the
type of cutting attachment being used.
Always wear proper eye protection.
STIHL's philosophy is to continually
improve all of its products. As a result,
engineering changes and improve-
ments are made from time to time. If the
operating characteristics or the appear-
ance of your brushcutter differs from
those described in this manual, please
contact your STIHL dealer for informa-
tion and assistance.
1

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Summary of Contents for Stihl FS 80

  • Page 1: Table Of Contents

    STIHL dealer for informa- Storing the Machine ......43 tion and assistance. Replacing the Nylon Line ....44 Sharpening Metal Cutting Tools ..45 see “Guide to Using this Manual” STIHl FS 80, FS 85, FS 85 T...

  • Page 2: Guide To Using This Manual

    STIHL dealer for Example: environment. assistance. Loosen the screw (1) Therefore, we cannot be responsible for Lever (2) ... changes, modifications or improvements not covered in this manual. FS 80, FS 85, FS 85 T...

  • Page 3: Safety Precautions And

    Safety Precautions and Working Techniques Warning! Most of these safety precautions and Warning! warnings apply to the use of all STIHL Because a brushcutter is The use of any brushcutter may be brushcutters. Different models may have a high-speed, fast-cutting hazardous.
  • Page 4 Therefore continual and regular users should monitor closely the condition of their hands and fingers. If any of the above symptoms appear, seek medical advice immediately. FS 80, FS 85, FS 85 T...
  • Page 5 Protect your hands with head injuries. gloves when handling the brushcutter and the cutting tool. Heavy-duty, nonslip gloves improve your grip and protect your hands. FS 80, FS 85, FS 85 T...
  • Page 6 Inspect for loose parts (nuts, and the tank venting system. throttle trigger interlock (if applicable), screws, etc.) and for cracked, bent, stopswitch, cutting tool, deflector and warped or damaged blades. harness. FS 80, FS 85, FS 85 T...
  • Page 7 (see chart in chapter on "Approved tightened and you must repeat the Combinations of Cutting Tool, Deflector, above steps. Handle and Harness"). FS 80, FS 85, FS 85 T...
  • Page 8 For specific starting instructions, see the appropriate section of your manual. Place the brushcutter on firm ground or other solid surface in an open area. Maintain a good balance and secure footing. FS 80, FS 85, FS 85 T...
  • Page 9 If you are unfamiliar with the risks associated with the particular dust or fume at issue, consult your employer, governmental agencies such as OSHA and NIOSH and other sources on hazardous materials. California and FS 80, FS 85, FS 85 T...
  • Page 10 Warning! Never attempt to operate any brush- cutter with one hand. Loss of control of the brushcutter resulting in serious or fatal injury may result. FS 80, FS 85, FS 85 T...
  • Page 11 Never use your brushcutter as a hedge trimmer. FS 80, FS 85, FS 85 T...
  • Page 12 Do not attempt any maintenance or repair work not described in your owner's manual. Have such work performed at your STIHL service shop only. Wear gloves when handling or doing maintenance on blade. FS 80, FS 85, FS 85 T...
  • Page 13 With a properly mounted guard, the built-in cutter will automatically adjust the line to its proper length. Overly long lines can overload the engine, resulting in damage to the clutch mechanism and nearby parts. FS 80, FS 85, FS 85 T...
  • Page 14 (see "Parts and Controls" chapter of this manual). FS 80, FS 85, FS 85 T...
  • Page 15 It has Improper use of a brush knife may cause 4 cutting knives with cutting edges on both sides, i.e. front and rear. it to crack, chip or shatter. FS 80, FS 85, FS 85 T...
  • Page 16 This will keep the brushcutter against the tree during the cutting operation and will reduce the risk of loss of control and possible kickout (described in the following section). FS 80, FS 85, FS 85 T...
  • Page 17 To reduce the risk of injury, extreme caution should be used when cutting with the shaded area of any rigid blade. FS 80, FS 85, FS 85 T...

  • Page 18: Approved Combinations Of

    Circular saw blades may be used only on brushcutters with a bike 16 Loop handle handle. 17 Loop handle with 18 Barrier bar 19 Bike handle 1) Not approved for FS 85 X or FS 110 X FS 80, FS 85, FS 85 T...
  • Page 19 / USA Cutting tool Deflector Handle Harness/Strap FS 80, FS 85, FS 85 T...

  • Page 20: Power Tool Attachments And Interchangeable Attachments

    STIHL power tool attachments and With straight drive tube CombiTools from the STIHL Shoulder strap not necessary CombiSystem are available for quickly converting the single purpose FS unit into other useful power tools. FS 80, FS 85, FS 85 T...

  • Page 21: Assembling The Split Drive Tube

    (3) (arrow point) must be flush with the end of the coupling sleeve. Tighten the wing screw (4) firmly. Reverse the above sequence to remove the lower part of the drive tube. FS 80, FS 85, FS 85 T...

  • Page 22: Adjusting The Throttle Cable

    (see illustration). Line up the holes (12). Fit screw and washer in control handle and tighten down firmly. On bike-handled versions only see "Guide to Using this Manual" FS 80, FS 85, FS 85 T...

  • Page 23: Mounting The Loop Handle

    Line up the holes. Insert screws (7) in holes and screw them into the barrier bar as far as stop. Go to “Securing the loop handle”. FS 80, FS 85, FS 85 T...

  • Page 24: Fitting The Carrying Eye

    Line up the carrying eye. on the square nuts (1) as far as stop. Tighten down the screw firmly. Go to “Securing the loop handle”. see “Guide to Using this Manual” see "Guide to Using this Manual" FS 80, FS 85, FS 85 T...

  • Page 25: Mounting The Deflector

    Insert M 5 x 18 screws and tighten Push the blade (5) into the upper down firmly. guide slot on the skirt and line it up with the first hole. Fit the screw and tighten it down firmly. FS 80, FS 85, FS 85 T...
  • Page 26 Pull the hose (7) (protector for tool in place of a mowing head, you shipping) off the shaft. will need the following additional parts: Nut (3), rider plate (4) and thrust washer (5) – see "Special Accessories". FS 80, FS 85, FS 85 T...
  • Page 27 Refer to instructions supplied with the Screw the cap (6) counter- mowing head. clockwise on to collar screw and tighten down firmly. Wind the nylon lines (3) around the spool (4). see "Guide to Using this Manual" FS 80, FS 85, FS 85 T...
  • Page 28 TrimCut 30-2 or PolyCut 20-3 Line feed operates only if both lines counterclockwise on to the still have a minimum length of shaft (1) as far as it will go. 1" (2.5 cm). Tighten the mowing head. FS 80, FS 85, FS 85 T...
  • Page 29 Direction of rotation is marked by arrow on inside of cutting head Fit the appropriate limit stop before deflector or limit stop. mounting the scratcher-tooth circular saw blade 200 (4 or 5). See chapter “Mounting the Deflector”. FS 80, FS 85, FS 85 T...

  • Page 30: Fuel

    When mixing, pour oil into the well. This could cause running problems canister first, and then add gasoline. or even damage the engine. For this reason it is essential that you use only name branded fuels! FS 80, FS 85, FS 85 T...

  • Page 31: Fueling

    Harness”. so as to allow any pressure build-up in the tank to release slowly. After fueling, tighten fuel cap as securely as possible by hand. see “Guide to Using this Manual” FS 80, FS 85, FS 85 T...

  • Page 32: Balancing The Brushcutter

    “Approved Combinations of Cutting Tool, Deflector, Handle and Harness”. Disconnecting brushcutter from harness Press down bar on spring hook (1). Pull clamp (2) out of the spring hook. see “Guide to Using this Manual” FS 80, FS 85, FS 85 T...

  • Page 33: Starting / Stopping The Engine

    $ – STOP (6) – to stop engine, push interlock in that order. This is the slide control in direction of c (7). slide control in direction of c (7). starting throttle poistion. FS 80, FS 85, FS 85 T...
  • Page 34 – even if the bulb is filled with press it down firmly – your thumb fuel. should be under the fan housing. Continue cranking until the engine runs. Do not stand or kneel on the drive tube! FS 80, FS 85, FS 85 T...
  • Page 35 # – and the engine settles starter rope firmly – down to idle speed. 10 to 20 pulls may be necessary. Open the throttle part way and warm up engine for a brief period. FS 80, FS 85, FS 85 T...

  • Page 36: Operating Instructions

    Install the foam element (3) in the Remove the foam and felt filter filter cover (2). elements. Place felt element (4) (lettering facing inward) in filter housing (5). Fit filter cover so that it snaps into position. FS 80, FS 85, FS 85 T...

  • Page 37: Motor Management

    With this carburetor it is only possibleto adjust the engine idle speed within fine limits.! FS 80, FS 85, FS 85 T...
  • Page 38 Warm up the engine. and accelerates smoothly. Engine stops while idling Turn idle speed screw (LA) slowly clockwise until the engine runs smoothly – the cutting tool must not rotate. FS 80, FS 85, FS 85 T...

  • Page 39: Spark Arresting Screen* In Muffler

    If screen is damaged or coked up, fit a new one. Refit the spark arresting screen. see “Guide to Using this Manual” FS 80, FS 85, FS 85 T...

  • Page 40: Lubricating The Gearbox

    SAE adapter nut, it must be attached.) A loose connection between spark plug boot and ignition wire connector in the boot may create arcing that could ignite combustible fumes and cause a fire. FS 80, FS 85, FS 85 T...
  • Page 41 (8) engages. the rope through the top of the grip Insert screw and tighten down and the rope bush (7). securely. Refit the cap in the grip. Go to "Tensioning the rewind spring". FS 80, FS 85, FS 85 T...
  • Page 42 – spring loop and bend it to size if release the rotor – necessary. let go of rope slowly so that it winds Go to "Tensioning the rewind onto the rotor. spring". FS 80, FS 85, FS 85 T...

  • Page 43: Storing The Machine

    To do this, push the upper mounting boss under the shroud – line up the tank and push lower part of cover onto the tank. Insert and tighten down the housing screws. Secure cable lug in position (if fitted). FS 80, FS 85, FS 85 T...

  • Page 44: Replacing The Nylon Line

    Bend the ends of the lines over the Winding nylon line onto spool edge of the holes to form a hook. A prewound spool – see “Special Accessories” – may be installed to save the following procedure. FS 80, FS 85, FS 85 T...

  • Page 45: Sharpening Metal Cutting Tools

    Check that the compression spring three strokes of the file are usually as stop. is installed (see “Mounting the enough. Mount the mowing head on the cutting tool”, “Mounting the mowing machine. head”). FS 80, FS 85, FS 85 T...
  • Page 46 – see “Special Accessories” – and maintain a filing angle of 30° (C). Sharpen cutting edge as shown by the lines (D) in the illustration. FS 80, FS 85, FS 85 T...
  • Page 47 (3). Maintain a sharpening angle of 30° (A). File back the cutting edge parallel to the lines on the sharpening template. Do not sharpen cutting edges (4) even if they are nicked in places. FS 80, FS 85, FS 85 T...

  • Page 48: Maintenance Chart

    All accessible screws and nuts (not adjusting Retighten screws) Anti-vibration element Have replaced Visual inspection Replace Metal cutting tools Sharpen Check tightness of cutting tool Check Gearbox lubrication Replenish 1) by STIHL dealer see “Guide to Using this Manual“ FS 80, FS 85, FS 85 T...
  • Page 49 19 Coupling sleeve 20 Barrier bar* 21 Loop handle 22 Drive tube 23 Lower drive tube (stub shaft) 24 Clamp* (carrying ring) (T model only) Serial number see "Guide to Using this Manual" FS 80, FS 85, FS 85 T...
  • Page 50 Slide Control Secures the lower part of the drive For starting throttle, run and stop. tube (stub shaft). Keeps the throttle partially open during starting, switches the engine’s ignition off to stop the engine. FS 80, FS 85, FS 85 T...
  • Page 51 6. Metal cutting tool. The cutting attachment, i. e. blade, made from metal for different purposes (special accessory). FS 80, FS 85, FS 85 T...

  • Page 52: Specifications

    Stroke: 1.10 in (28 mm) Fuel mix: See “Fuel” Power according to ISO 8893: 1.3 bhp (0.95 kW) Idle speed: 2,800 rpm Max. engine speed: 10,500 rpm see “Guide to Using this Manual” FS 80, FS 85, FS 85 T...
  • Page 53 (chisel tooth) Sharpening templates (metal and plastic), for 9 Not approved for loop-handled Contact your STIHL dealer for the latest FS 80, FS 85 and FS 85 T without information on these and other special barrier bar accessories. Mounting hardware for...
  • Page 54 STIHL replacement parts. Original STlHL parts can be identified by the STIHL part number, the STIHl STIHl STIHl STIHl logo and the STlHL parts symbol ( The symbol may appear alone on small parts. FS 80, FS 85, FS 85 T...
  • Page 55 FS 80, FS 85, FS 85 T...
  • Page 56 Warranty Service servicing dealer. Emission test may be performed either at STIHL Incorporated Bring the product to any authorized or at any independent test laboratory. STIHL servicing dealer and present the signed warranty card. FS 80, FS 85, FS 85 T...

This manual is also suitable for:

Fs 85Fs 85 t

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