Stihl MS 381 Instruction Manual
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Stihl MS 381 Instruction Manual

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STIHL MS 381
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  • Page 1 STIH) STIHL MS 381 Instruction Manual...

  • Page 2: Table Of Contents

    Muffler ........33 Thank you for choosing a quality Working Techniques ......3 Replacing Starter Rope engineered STIHL product. Mounting the Bar and Chain ... 17 and Rewind Spring ......34 This machine has been built using Tensioning the Saw Chain ....18 Storing the Machine .......

  • Page 3: Guide To Using This Manual

    Engineering improvements in different ways: individual components. STIHL’s philosophy is to continually Note or hint which is not essential A bullet marks a step or procedure improve all of its products. As a result, for using the machine, but may...

  • Page 4: Safety Precautions And Working Techniques

    Have your STIHL dealer show you how their physician and the pacemaker STIHL recommends the use of STIHL to operate your chainsaw or attend a manufacturer before operating this tool.
  • Page 5 Keep clear of naked Clothing must be sturdy flames and fire. Do not but allow complete STIHL offers a comprehensive range of spill any fuel – do not freedom of movement. safety clothing and equipment. smoke. Wear snug-fitting clothing with cut retardant Stop the engine before refueling.
  • Page 6 – Keep the handles dry and clean – free from oil and pitch – for safe control. To reduce risk of personal injury, do not operate your saw if it is damaged or not properly assembled. MS 381...
  • Page 7 To reduce the risk of accidents, take a caused by an excessively high break in good time to avoid tiredness or concentration of exhaust gases in the exhaustion. work area. MS 381...
  • Page 8 – the depth gauge setting must not be too large. – Use a low kickback chain and a narrow radius guide bar. Kickback occurs when the saw is suddenly thrown up and back in an uncontrolled arc towards the operator. MS 381...
  • Page 9 When felling in the vicinity of roads, the top of the guide bar to be railways, power lines, etc., take extra pinched. precautions. If necessary, inform the police, utility company or railway – Do not twist the guide bar in the cut. authority MS 381...
  • Page 10 Use the shortest possible guide bar: The – Do not work above shoulder height chain, guide bar and chain sprocket – Never operate the saw with one must match each other and your saw. hand MS 381...
  • Page 11 – Snow load – Soundness of tree – take special care if trunk is damaged or in case of deadwood (dry, decayed or rotted wood) Maintain a distance of at least 2 tree lengths from next felling site. MS 381...
  • Page 12 – observe B = Escape paths country-specific regulations on felling techniques. – Establish paths of escape for everyone concerned – opposite to STIHL recommends the following direction of fall at about 45°. method: – Remove all obstacles from escape paths. –...
  • Page 13 Do not make sapwood cuts if wood is Important: notch. This is the hinge. diseased. – Felling notch at a right angle to the planned direction of fall. – As close to ground as possible. – Cut to a depth of about the trunk diameter. MS 381...
  • Page 14 – this could result in an accident. bumper rolls against the trunk. First cut (1): Nose of guide bar should enter wood just behind the hinge – hold the saw horizontally and swing it as far as possible. MS 381...
  • Page 15 – there is a danger of pushback at this Make the plunge cut (3) very carefully. point – then swing the bar in the Danger of pushback. direction of the arrow. MS 381...
  • Page 16 If not otherwise possible, make the bucking cut from the bottom upwards (underbuck) – be wary of pushback. Do not cut a lying log at a point where it is touching the ground because the saw chain will otherwise be damaged. MS 381...
  • Page 17 Use only a spark plug of the type Have all other work performed by a – before retensioning the chain. approved by STIHL and make sure it is specialist dealer. – before replacing the chain. in good condition – see "Specifications".

  • Page 18: Mounting The Bar And Chain

    Fit the chain – start at the bar nose. they may be damaged beyond repair after a short period of operation. MS 381...

  • Page 19: Tensioning The Saw Chain

    Check chain tension frequently – see and screw on the nuts only finger- often than one that has been in use for "Operating Instructions". tight. some time. Go to “Tensioning the Saw Chain”. Check chain tension frequently – see chapter "Operating Instructions". MS 381...

  • Page 20: Fuel

    STlHL engines 0.20 (200) 0.40 (400) and guarantees a long engine life. 0.30 (300) 0.60 (600) If STIHL two-stroke engine oil is not 0.40 (400) 0.80 (800) Mixing Fuel available, use only quality two-stroke oil 0.50 (500) 1.00...

  • Page 21: Fueling

    Take care not to spill fuel while fuelling Pressure may build up in the and do not overfill the tank. STIHL canister – open it carefully. recommends use of the STIHL filling Clean the fuel tank and canister system (special accessory).

  • Page 22: Chain Lubricant

    Rapidly biodegradable STIHL Bioplus is recommended. Biological chain oil must be resistant to aging (e.g. STIHL Bioplus) since it will otherwise quickly turn to resin. This results in hard deposits that are difficult to remove, especially in the...

  • Page 23: Filling Chain Oil Tank

    STIHL recommends that you Always check chain lubrication and have maintenance and repair work oil level in tank before starting work. performed only by a STIHL servicing dealer. Every new chain has to be broken in for about 2 to 3 minutes.

  • Page 24: Chain Brake

    High revs with the chain brake engaged (chain locked) will quickly damage the powerhead and chain drive (clutch, chain brake). MS 381...

  • Page 25: Information Before You Start

    It is necessary to have it serviced and maintained regularly by trained personnel. STIHL recommends that you have the maintenance and repair work performed by a STIHL servicing dealer at the following intervals: The four positions of the Full-time professional...
  • Page 26 Position 4 if engine is cold. under the handlebar. Position 5 if engine is warm (also use position 5 if the engine has Put your right foot into the rear been running but is still cold) handle and press down. MS 381...
  • Page 27 As the chain brake is still engaged, several times to prime the fuel system. lubrication before starting work. the engine must be returned to idling speed immediately – or the engine and chain brake might otherwise be damaged. MS 381...
  • Page 28 – even if the engine is cold. Move Master Control (7) to run Press the button to open the position. decompression valve. Loosen knob (10) in direction of Now start the engine. arrow. Remove carburetor box cover (11). MS 381...

  • Page 29: Operating Instructions

    (clutch, slackened off, it can damage the from sources of ignition, until you need it chain brake). crankshaft and bearings. again. Storing for a long period: See “Storing the Unit”! MS 381...

  • Page 30: Oil Quantity Control

    (1), the oilway (2) and the bar groove (3). Measure groove depth – with scale on filing gauge* – in area used most for cutting. * Special accessory see “Guide to Using this Manual” MS 381...

  • Page 31: Cleaning The Air Filter

    English Cleaning the Air Filter In case of stubborn dirt: Wash the filter components in STIHL universal cleaner or a clean, non-flammable solution (e.g. warm soapy water) and then dry. Always replace a damaged filter. Reassemble the filter components. Make sure the choke shutter (8) and...

  • Page 32: Adjusting The Carburetor

    Open the low speed screw (L) one overheating. full turn. If you do not have a tachometer, do not set the high speed screw any leaner by turning it beyond the standard setting. MS 381...

  • Page 33: Checking The Spark Plug

    Turn the idle speed screw (LA) see "Starting / Stopping the Engine". counterclockwise until chain stops Clean dirty spark plug. running – then turn screw another quarter turn in the same direction. Check electrode gap (A) and readjust if necessary – see "Specifications". MS 381...

  • Page 34: Spark Arresting Screen In Muffler

    If the engine is down on power, Install only suppressed spark plugs check the spark arresting screen in of the type approved by STIHL – the muffler. see "Specifications". Wait for the muffler to cool down. Take out the screw (1).

  • Page 35: Replacing Starter Rope And Rewind Spring

    Carefully remove the rope rotor with washer (3) and pawl (4). Pull the rope through the rotor and secure it with a simple overhand The rewind spring may pop out knot. during this procedure – take care to avoid injury. MS 381...

  • Page 36: Stihl

    When the starter rope is fully extended it must still be possible to rotate the rotor another half turn. If this is not the case, the spring is overtensioned and could break. Take one turn of rope off the rotor in such a case. MS 381...

  • Page 37: Storing The Machine

    Accessories) to check the depth of the wear marks on sprockets. It is best to use two chains in rotation with one sprocket. STIHL recommends the use of original STIHL sprockets to ensure correct operation of the chain brake. MS 381...

  • Page 38: Stihl

    Replace the rim sprocket (3) Take out the screws (5). and worm. Replace any worn or with cavities facing outward. Remove the side plate (6) and damaged parts. Refit the washer and E-clip on the cover (7) with cover washer (8). crankshaft. MS 381...

  • Page 39: Stihl

    Install the circlip on the spur sprocket – each end of the ring must locate on the top of a tooth. Replace the rim sprocket (3) with cavities facing outward. Fit the washer and E-clip on the crankshaft. MS 381...

  • Page 40: Maintaining And Sharpening Saw Chain

    – there is a risk of increased Super = Full chisel kickback of the chainsaw, with The specified angles A and B are resulting risk of injury. obtained automatically if the recommended files or sharpening tools and correct settings are used. MS 381...

  • Page 41: Stihl

    Rest the file holder on To rotate the chain, pull the hand the top plate and depth gauge. guard against the front handle to disengage the chain brake. On models with QuickStop Super, also press down the throttle trigger interlock lever. MS 381...

  • Page 42: Stihl

    (9.32) 0.45 (0.018) (9.32) 0.65 (0.026) 0.325 (8.25) 0.65 (0.026) (9.32) 0.65 (0.026) 0.404 (10.26) 0.80 (0.031) File down the depth gauge until it is level with the filing gauge. MS 381...

  • Page 43: Stihl

    5605 772 5506 5605 750 4330 1106 893 4000 0814 252 3356 5605 007 1030 1) Use triangular file 0811 421 8971 for PM1 and RM2 2) consisting of file holder with round file, flat file and filing gauge MS 381...

  • Page 44: Maintenance Chart

    Chain sprocket Check Clean Air filter Replace Inspect Antivibration elements Have replaced by servicing dealer Cooling inlets Clean Cylinder fins Clean 1) STIHL recommends that this work be done by a STIHL servicing dealer 2) see "Chain brake" MS 381...

  • Page 45: Stihl

    Chain catcher Replace Safety label Replace 1) STIHL recommends that this work be done by a STIHL servicing dealer 2) Firmly tighten cylinder base screws of professional saws (3.4 kW or more) after 10 to 20 hours of operation see “Guide to Using this Manual“...

  • Page 46: Minimize Wear And Avoid Damage

    – Saw chain, guide bar precautions, operating and maintenance only by an authorized STIHL servicing – Drive components (Clutch, instructions in this manual. This includes dealer. STIHL servicing dealers are able...

  • Page 47: Main Parts And Controls

    15 Front hand guard 16 Front handle (handlebar) 17 Starter grip 18 Fuel tank filler cap 19 Master Control lever 20 Throttle trigger 21 Throttle trigger interlock 22 Rear handle 23 Rear hand guard see "Guide to Using this Manual" MS 381...

  • Page 48: Specifications

    Fuel tank capacity: 0.68 l (680 cm (5.3 HP) Oil tank capacity: 0.36 l (360 cm MS 381 N Contact your STIHL dealer for more Weight (without cutting attachment) Engine power information on these and other special 6.6 kg to ISO 7293 3.6 kW...

  • Page 49: Ordering Spare Parts

    Model When repairing the machine, only use replacement parts which have been approved by STIHL for this power tool Serial number or are technically equivalent. Only use high-quality replacement parts in order to avoid the risk of accidents or damage Guide bar part number to the machine.

  • Page 50: Manufacturer's Declaration Of Conformity

    An independent organization has certified that all products manufactured The measured and guaranteed sound Elsner by STIHL meet the strict requirements of power level was determined according Director the ISO 9001 standard for quality to Directive 2000/14/EC, Annex V, using...

  • Page 51: Stihl

    English MS 381...

  • Page 52: Stihl

    English MS 381...
  • Page 53 English MS 381...

  • Page 54: Stihl

    0458 538 0121 A englisch / English...

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