Stihl FS 120 Instruction Manual
  1. Manuals
  2. Brands
  3. Stihl Manuals
  4. Brush Cutter
  5. FS 120
  6. Instruction manual

Stihl FS 120 Instruction Manual

Hide thumbs Also See for FS 120:
Table of Contents

Advertisement

Quick Links

STIHL FS 120, 120 R
2 - 42
Instruction Manual

Advertisement

Table of Contents
loading

Related Manuals for Stihl FS 120

Summary of Contents for Stihl FS 120

  • Page 1 STIHL FS 120, 120 R 2 - 42 Instruction Manual...

  • Page 2: Table Of Contents

    Minimize Wear and Avoid Damage...39 Main Parts..........40 Engineering improvements Specifications..........40 Maintenance and Repairs......41 STIHL's philosophy is to continually improve all Disposal............ 42 of its products. For this reason we may modify EC Declaration of Conformity....42 the design, engineering and appearance of our Dear Customer, products periodically.
  • Page 3 Only use cutting attachments and accessories Wear hearing protection, e.g. earplugs or ear that are explicitly approved for this power tool muffs. model by STIHL or are technically identical. If you have any questions in this respect, consult a 0458-251-0121-B...
  • Page 4 Open the fuel cap carefully to allow any pressure build-up in the tank to release slowly and avoid fuel spillage. STIHL offers a comprehensive range of personal Fuel your power tool only in well-ventilated protective clothing and equipment. areas. If you spill fuel, wipe the machine immedi‐...
  • Page 5 2 Safety Precautions and Working Techniques English – Never attempt to modify the controls or safety 2.6.1 Models with bike handle devices in any way. – Keep the handles dry and clean – free from oil and dirt – for safe control of the power tool. –...
  • Page 6 2 Safety Precautions and Working Techniques when the engine is idling, have the machine If your power tool is subjected to unusually high checked by your servicing dealer. STIHL recom‐ loads for which it was not designed (e.g. heavy mends an authorized STIHL servicing dealer.
  • Page 7 To reduce the risk of injury, a metal cutting attachment not manufactured by STIHL must not STIHL recommends the use of original STIHL be heavier, thicker, have a different shape or a metal cutting attachments. They are specifically...
  • Page 8 Use only a spark plug of the type approved by 2.13 Harness / Strap STIHL and make sure it is in good condition – see "Specifications". The harness is included in the scope of supply or Inspect the ignition lead (insulation in good con‐...
  • Page 9 The machine is thrown to the line. right or to the rear – opposite to the attachment's direction of rotation. 2.15 STIHL Polycut Mowing Head with Polymer Blades For mowing unobstructed edges of meadows (without posts, fences, trees or similar obsta‐ cles).
  • Page 10 – Inspect the brush knife at regular short inter‐ vals for signs of damage. Do not continue working with a damaged brush knife. – Resharpen the brush knife regularly and whenever it has dulled noticeably, and have it balanced if necessary (STIHL recommends a STIHL servicing dealer). 0458-251-0121-B...
  • Page 11 Use circular saw blades only with a matching operators with specialized training. limit stop of the correct diameter. STIHL recommends that you use the non-sha‐ ded area of the circular saw blade. Always start WARNING the cut with this area of the blade.

  • Page 12: Approved Combinations Of Cutting Attach- Ment, Deflector, Handle And Harness

    10 Grass cutting blade 230‑4 Cutting attachments (Ø 230 mm) 3.2.1 Mowing heads 11 Grass cutting blade 230‑8 (Ø 230 mm) 1 STIHL SuperCut 20‑2 12 Grass cutting blade 250‑40 Spezial 2 STIHL AutoCut 25‑2 (Ø 250 mm) 3 STIHL AutoCut C 26‑2 0458-251-0121-B...

  • Page 13: Approved Power Tool Attachments

    27 Full harness must be used Approved Power Tool Attachments The following STIHL attachment may be moun‐ ted to the basic power tool: ► Fasten the handlebar (1) at a distance (A) of approx. 40 cm (15 in) ahead of the engine housing on the shaft (2) ►...
  • Page 14 English 5 Mounting the Bike Handle Mounting the Control Handle ► Place handlebar (1) in the handlebar support so that the distance (B) is not more than ► Unscrew the screw (1) – the nut (2) remains in 15 cm (6 in) – the rubber handle (6) must be the control handle (3) on the left (viewing direction from engine to ►...

  • Page 15: Mounting The Loop Handle

    6 Mounting the Loop Handle English Mounting the Loop Handle Fastening the Throttle Cable Mounting Loop Handle with NOTICE Barrier Bar Do not kink the throttle cable or lay it in tight radii – make sure the throttle trigger moves freely. ►...

  • Page 16: Adjusting The Throttle Cable

    English 7 Adjusting the Throttle Cable Securing the Loop Handle ► Position the clamp (6) against the drive tube. ► Place the barrier bar (2) in position as shown. ► Line up the holes. ► Insert the screws (7) in the holes and screw them into the barrier bar (2) as far as stop.

  • Page 17: Fitting The Carrying Ring

    8 Fitting the Carrying Ring English Fitting the Carrying Ring Polymer Version ► Use a suitable tool to push the slide to the end of the slot (see illustration). ► Press down the trigger lockout (1) and squeeze the throttle trigger (2) (full throttle position) –...

  • Page 18: Mounting The Deflector

    English 9 Mounting the deflector Mounting the deflector Fitting the Skirt and Blade Mounting the Deflector WARNING Risk of injury from thrown objects and contact with the cutting attachment. These parts must be fitted to the deflector (1) when you use a mowing head.

  • Page 19: Mounting The Cutting Attachment

    10 Mounting the Cutting Attachment English Mounting the Limit Stop WARNING Risk of injury from thrown objects and contact with the cutting attachment. Always fit the limit stop (6) when you use a circular saw blade. ► Position the limit stop (6) on the gearbox flange.
  • Page 20 English 10 Mounting the Cutting Attachment 10.3 Blocking the Shaft ► Take the thrust washer (3) off the shaft (4). Do not remove the thrust plate (5). 10.5 Mounting the Cutting Attach‐ ment WARNING Use a deflector that matches the cutting attach‐ ment –...
  • Page 21 10 Mounting the Cutting Attachment English 10.8 Mounting Metal Cutting Attach‐ WARNING ments Direction of rotation is indicated by an arrow on Keep the leaflet and packaging of the metal cut‐ the inside of the deflector. ting attachment in a safe place. WARNING Wear protective gloves to reduce the risk of direct contact with the sharp cutting edges.

  • Page 22: Fuel

    (9). 11 Fuel 11.2.2 Engine Oil If you mix the fuel yourself, use only STIHL two- Your engine requires a mixture of gasoline and stroke engine oil or another high-performance engine oil. engine oil in accordance with JASO FB, JASO...

  • Page 23: Fueling

    STIHL filler nozzle for fuel (special acces‐ unusable. sory). ► Open the tank cap. STIHL MotoMix may be stored for up to 2 years ► Fill up with fuel. without any problems. ► Closing the Tank Cap ► Thoroughly shake the mixture in the canister before fueling your machine.
  • Page 24 English 13 Fitting the Harness 13.2 Full Harness 13.3 Attaching Machine to Harness ► Put on the harness (1) and close the locking The type and style of the harness and carabiner plate (3). (spring hook) depend on the market. ►...

  • Page 25: Balancing The Machine

    14 Balancing the Machine English 13.4 Disconnecting Machine from Harness ► Loosen the screw (1). ► Slide the carrying ring (2) along the drive tube. ► Tighten the screw moderately. ► Press down the bar on the carabiner (1) and ►...

  • Page 26: Starting / Stopping The Engine

    English 15 Starting / Stopping the Engine 15.1.2 Control handle on shaft Circular saw blades ► should "hover" about 20 cm (8 in) above the ground. When the correct floating position has been reached: ► Tighten down the screw on the carrying ring firmly.
  • Page 27 15 Starting / Stopping the Engine English NOTICE Do not stand or kneel on the shaft! ► Set the choke knob (8) to: if the engine is cold for warm start – also use this position if the engine has been running but is still cold. ►...

  • Page 28: Transporting The Unit

    English 16 Transporting the Unit 16.2 230 mm Grass Cutting Blades ► Let the engine warm up briefly 15.5 If Engine Does Not Start 15.5.1 Choke Knob If you did not move the choke knob quickly enough to e after the engine began to fire, the engine is flooded.
  • Page 29 16 Transporting the Unit English 16.3 250 mm Brush Knives 16.4 Grass Cutting Blades up to 260 mm ► Disconnect wire rod from the transport guard. ► Swing wire rod outwards. ► Fit the transport guard on the cutting attach‐ ment from below.

  • Page 30: Operating Instructions

    English 17 Operating Instructions ► Swing wire rod into position. ► Hook wire rod to the transport guard. 16.5 Circular Saw Blades ► Swing wire rod outwards. ► Fit transport guard on saw blade from below, making sure the limit stop is properly seated in the recess.

  • Page 31: Air Filter

    18 Air filter English 19 Adjusting the Carburetor 17.2 During Operation After a long period of full throttle operation, allow 19.1 General Information the engine to run for a short while at idle speed The carburetor comes from the factory with a so that engine heat can be dissipated by the flow standard setting.

  • Page 32: Spark Plug

    English 20 Spark Plug 19.4.2 Cutting attachment rotates when the type approved by STIHL – see "Specifica‐ engine is idling tions". ► Turn the idle speed screw (LA) counterclock‐ 20.1 Removing the Spark Plug wise until the cutting attachment stops moving ►...

  • Page 33: Engine Running Behavior

    ► Remove the screw plug (1). ► If no grease can be seen on the inside of the screw plug (1): Screw the tube (2) of STIHL gear lubricant (special accessory) into the filler hole.
  • Page 34 English 23 Replacing the Starter Rope and Rewind Spring 23.2 Replacing the Starter Rope ► Thread the rope through the rotor and secure it with a simple overhand knot. ► Remove the spring clip (2). ► Coat the rope rotor bearing bore with non-res‐ ►...

  • Page 35: Storing The Machine

    – rotor and spring housing. To reduce the risk of STIHL recommends a STIHL servicing dealer. injury, Wear a face shield and work gloves. ► Sharpen frequently, take away as little metal as possible –...

  • Page 36: Maintaining The Mowing Head

    ► Tap it on the ground once – fresh line is cutting attachment for out-of-balance on a advanced and the blade on the deflector trims STIHL balancer (special accessory) or have it it to the right length. checked by a dealer and re-balanced as nec‐...

  • Page 37: Inspection And Maintenance By User

    28.1 Maintenance Work WARNING STIHL recommends that you have servicing and repair work carried out exclusively by an author‐ To reduce the risk of injury, always shut off the ized STIHL servicing dealer.

  • Page 38: Maintenance And Care

    English 29 Maintenance and Care 29 Maintenance and Care The following intervals apply for normal operating conditions. The specified intervals must be short‐ ened accordingly when working for longer than nor‐ mal or under difficult cutting conditions (extensive dust, etc.). Complete machine Visual inspection (condi‐...

  • Page 39: Minimize Wear And Avoid Damage

    (extensive dust, etc.). 1)STIHL recommends STIHL dealers2)see chapter "Inspection and Maintenance by Dealer", section "Antivibration Elements" 30 Minimize Wear and Avoid for any damage that may occur. Among other...

  • Page 40: Main Parts

    English 31 Main Parts 31 Main Parts 1 Fuel cap 2 Choke knob 3 Carburetor adjusting screws 4 Manual fuel pump 1 Drive tube 5 Starter grip 2 Mowing head 6 Spark plug boot 3 Deflector for mowing heads only 7 Muffler 4 Line limiting blade 8 Throttle trigger...

  • Page 41: Maintenance And Repairs

    FS 120 technical information. Handle, left Handle, When repairing the machine, only use replace‐ right ment parts which have been approved by STIHL with mowing head 6.3 m/s 5.0 m/s for this power tool or are technically identical. with metal mowing 4.9 m/s...

  • Page 42: Disposal

    Done at Waiblingen, 03.02.2020 ANDREAS STIHL AG & Co. KG STIHL products must not be thrown in the gar‐ bage can. Take the product, accessories and packaging to an approved disposal site for envi‐ ronment-friendly recycling.
  • Page 43 35 EC Declaration of Conformity English 0458-251-0121-B...
  • Page 44 *04582510121B* 0458-251-0121-B...

This manual is also suitable for:

Fs 120 r

Table of Contents