Stihl FS 450 Instruction Manual
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Stihl FS 450 Instruction Manual

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STIHL FS 400, 450
Instruction Manual

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  • Page 1 STIHL FS 400, 450 Instruction Manual...

  • Page 3: Table Of Contents

    Maintenance and Care Minimize Wear and Avoid Damage Main Parts Specifications Maintenance and Repairs Disposal This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process with electronic systems. FS 400, FS 450...

  • Page 4: Safety Precautions And Working Techniques

    Engineering improvements keep it in a safe place for future reference. Non- observance of the Operate decompression STIHL's philosophy is to continually instruction manual may valve improve all of its products. For this result in serious or even reason we may modify the design, fatal injury.
  • Page 5 Only use cutting attachments and Wear heavy-duty work accessories that are explicitly approved gloves made of durable for this power tool model by STIHL or material (e.g. leather). are technically identical. If you have any questions in this respect, consult a...
  • Page 6 English STIHL offers a comprehensive range of Transporting by vehicle: Properly secure Before Starting personal protective clothing and your power tool to prevent turnover, fuel equipment. spillage and damage. Check that your power tool is properly assembled and in good condition – refer...
  • Page 7 Hold the unit / stop switch to STOP or 0. securely. The cutting attachment must be clear of the ground and all other obstructions because it may begin to run when the engine starts. FS 400, FS 450...
  • Page 8 – do not run the engine Be particularly alert and cautious when unnecessarily, accelerate the engine wearing hearing protection because only when working. your ability to hear warnings (shouts, alarms, etc.) is restricted. FS 400, FS 450...
  • Page 9 Do not continue using or attempt to Clean grass and plant residue off the STIHL recommends the use of original repair damaged or cracked cutting cutting attachment mounting at regular STIHL metal cutting attachments. They attachments by welding, straightening or intervals –...
  • Page 10 Maintenance and Repairs Use only a spark plug of the type To reduce the risk of injury, a metal approved by STIHL and make sure it is cutting attachment not manufactured by Service the machine regularly. Do not in good condition – see "Specifications".
  • Page 11 – less risk of damaging tree bark. mowing line – risk of injury. with a quick-release system. The mowing head comes with an STIHL Polycut Mowing Head with instruction leaflet. Refill the mowing Polymer Blades head with nylon line as described in the instruction leaflet.
  • Page 12 Brush Knife For cutting matted grass, wild growth and scrub and thinning young stands with a stem diameter of no more than 2 cm – do not cut thicker stems – risk of accidents. FS 400, FS 450...
  • Page 13 – always keep the cutting attachment below hip Before starting the cut, accelerate the level during this process. engine up to full throttle. Perform cut with uniform pressure. FS 400, FS 450...
  • Page 14 These areas of the blade should only be used by experienced operators with specialized training. STIHL recommends that you use the non-shaded area of the circular saw blade. Always start the cut with this area of the blade.

  • Page 15: Approved Combinations Of Cutting Attachment, Deflector, Limit Stop And Harness

    English Approved Combinations of Cutting Attachment, Deflector, Limit Stop and Harness Cutting Attachment Deflector, Limit Stop Harness FS 400, FS 450...
  • Page 16 (250 mm dia.) items 14 and 15 11 Brush knife 305-2 Spezial 25 Limit stop for circular saw blades, items 16 and 18 (305 mm dia.) 12 Brush knife 300-3 (300 mm dia.) for FS 450 only FS 400, FS 450...

  • Page 17: Mounting The Bike Handle

    Tighten down the clamping screw Go to "Adjusting the Throttle Cable". the lower clamp. firmly. Transport and storage position: Loosen the clamping screw, turn the handlebar in line with the drive tube and fold the handles down. FS 400, FS 450...

  • Page 18: Adjusting The Throttle Cable

    Press down the throttle trigger lockout (1) and squeeze the throttle trigger (2) (full throttle) – this sets the throttle cable correctly. FS 400, FS 450...
  • Page 19 Remove dirt from joints on gearbox and deflector – make sure that no dirt gets into the screw holes in the gearbox. Place the deflector on the gearbox (6). Insert the screws (7) and tighten them down firmly. FS 400, FS 450...

  • Page 20: Mounting The Cutting Attachment

    The mounting hardware is fitted to the Checking the Thrust Plate gearbox for transportation and must be removed before mounting a cutting attachment. The thrust plate is necessary for mounting all cutting attachments to the gearbox. FS 400, FS 450...
  • Page 21 Also check for contamination when changing the cutting attachment and clean thoroughly if necessary. Remove all cutting attachment mounting hardware from the gearbox for this purpose. FS 400, FS 450...
  • Page 22 Mounting the cutting attachment Removing and Installing Metal Cutting WARNING Fit the guard ring for mowing Attachments applications. If the mounting nut has become too loose, fit a new one. Before removing and installing metal cutting attachments: FS 400, FS 450...
  • Page 23 Unscrew the mounting nut clockwise. Pull the cutting attachment with its mounting hardware off the gearbox. Place the shredder blade (1) in position – the cutting edges must Place the cutting attachment (1) in point upwards. position. FS 400, FS 450...

  • Page 24: Fuel

    If the mounting nut has become too loose, fit a new one. Use only high-quality two-stroke engine STIHL MotoMix uses STIHL HP Ultra oil – preferably STIHL HP, HP Super or two-stroke engine oil for an extra long HP Ultra, which are specially formulated engine life.

  • Page 25: Fueling

    30 days. Exposure to light, the sun, low or high temperatures can quickly make the fuel mix unusable. STIHL MotoMix may be stored for up to 2 years without any problems. Before fueling, clean the filler cap...

  • Page 26: Fitting The Full Harness

    Push the new pickup body into the hose. Circular saw blades should "hover" Place the pickup body in the tank. about 20 cm above the ground. FS 400, FS 450...

  • Page 27: Starting / Stopping The Engine

    Press the manual fuel pump is running or can start bulb (9) at least five times – even if the bulb is filled with fuel. START – ignition is switched on – the engine can start FS 400, FS 450...
  • Page 28 If you did not turn the choke knob to e The slide control moves to the quickly enough after the engine began to normal run position ?F – and the fire, the combustion chamber is flooded. engine settles down to idle speed. FS 400, FS 450...

  • Page 29: Operating Instructions

    For longer out-of- fuel pump bulb at least five times – service periods – see "Storing the even if the bulb is filled with fuel. Machine". Set the choke knob according to engine temperature. Start the engine. FS 400, FS 450...

  • Page 30: Adjusting The Carburetor

    Carry out the standard setting. turn the screw another 1/2 to 1 full Warm up the engine. turn in the same direction. Turn high speed screw (H) slightly clockwise (leaner) – no further than stop. FS 400, FS 450...

  • Page 31: Winter Operation

    Push the cover (3) into the summer position. Remove the standard air filter (1) and install the special filter (2) for winter operation. Push the cover (3) up against the underside of the filter cover. This is the winter position. FS 400, FS 450...

  • Page 32: Electric Handle Heating

    – or sooner if the Switching on the handle heating electrodes are badly eroded. Install (depending on model) only suppressed spark plugs of the type approved by STIHL – see "Specifications". Clean dirty spark plug. Check electrode gap (A) and Removing the Spark Plug readjust if necessary –...

  • Page 33: Engine Running Behavior

    Lubricating the Gearbox properly tightened adapter nut. Installing the spark plug If engine running behavior is Use STIHL gear lubricant (special unsatisfactory even though the air filter accessory) for lubrication. is clean and the carburetor and throttle Screw home the spark plug, fit the cable are properly adjusted, the cause boot and press it down firmly.

  • Page 34: Storing The Machine

    Dispose of fuel properly in Resharpen with a grinder or have balanced as necessary – STIHL accordance with local the work done by a dealer – STIHL recommends a STIHL servicing environmental requirements. recommends a STIHL servicing dealer.

  • Page 35: Maintaining The Mowing Head

    The thermoplastic cutting blades are If necessary, remove the mowing engages – and allow it to spring referred to as "blades" in the following. head. back. Pull ends of the lines outward. FS 400, FS 450...
  • Page 36 WARNING To reduce the risk of injury, always shut off the engine before installing the blades. Remove the mowing head. Replace blades as shown in the illustrated instructions. Mount the mowing head on the machine. FS 400, FS 450...

  • Page 37: Maintenance And Care

    Cooling inlets Clean Have checked by servicing dealer Spark arrestor in muffler Have cleaned or replaced by servicing dealer All accessible screws and nuts (not adjust- Retighten ing screws) Check Antivibration elements Have replaced by servicing dealer FS 400, FS 450...
  • Page 38 (very dusty work area, etc.), shorten the specified intervals accordingly. Visual inspection Cutting attachment Replace Check tightness Metal cutting attachment Sharpen Check Gearbox lubrication Replenish Safety labels Replace STIHL recommends an authorized STIHL servicing dealer. not in all versions, market-specific FS 400, FS 450...

  • Page 39: Minimize Wear And Avoid Damage

    English servicing dealer. STIHL dealers are Spark plug – Minimize Wear and Avoid regularly given the opportunity to attend Antivibration elements Damage – training courses and are supplied with the necessary technical information. Observing the instructions in this manual helps reduce the risk of unnecessary If these maintenance operations are not wear and damage to the power tool.

  • Page 40: Main Parts

    Carrying strip Manual fuel pump Choke knob 10 Filter cover 11 Fuel tank 12 Spark plug boot 13 Decompression valve 14 Muffler 15 Starter grip 16 Carburetor adjusting screw 17 Tank cap 18 Guard plate Serial number FS 400, FS 450...

  • Page 41: Specifications

    English Specifications Engine STIHL single cylinder two-stroke engine FS 400 Shredder blade Displacement: 40.2 cc Shredder deflector (for shredder Bore: 40 mm blade only) Stroke: 32 mm Engine power to 1.9 kW (2.6 bhp) ISO 8893: at 9,000 rpm Idle speed:...
  • Page 42 FS 400 with short shaft: 1635 mm FS 450: 2.2 m/s 1.7 m/s FS 450: 1765 mm Ignition System FS 450 with short shaft: 1635 mm with metal mow- Handle, Handle, ing attachment left right FS 450 with long shaft:...

  • Page 43: Guide To Using This Manual 2 Ec Declaration Of Conformity

    Take the product, FS 450 K replacement parts which have been accessories and packaging to an approved by STIHL for this power tool or approved disposal site for environment- FS 450 L are technically identical. Only use high- friendly recycling.
  • Page 44 FS 400: 114 dB(A) all FS 450: 115 dB(A) Technical documents deposited at: ANDREAS STIHL AG & Co. KG Produktzulassung (Product Licensing) The year of manufacture and serial number are applied to the product. Done at Waiblingen, 11.03.2016 ANDREAS STIHL AG & Co. KG...
  • Page 45 English FS 400, FS 450...
  • Page 46 English FS 400, FS 450...
  • Page 48 0458-255-0121-B englisch www.stihl.com *04582550121B* 0458-255-0121-B...

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