Stihl MS 291 Instruction Manual
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Stihl MS 291 Instruction Manual

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Summary of Contents for Stihl MS 291

  • Page 1 STIHL MS 271, 291 Instruction Manual...

  • Page 3: Table Of Contents

    Spark Arresting Screen in Muffler Spark Plug Storing the Machine This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process with electronic systems. MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 4: Guide To Using This Manual

    Direction of chain travel NOTICE Caution where there is a risk of damaging the machine or its individual components. Ematic; chain oil flow adjustment Tension saw chain MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 5: Safety Precautions

    The user is responsible for avoiding caused while using unauthorised injury to third parties or damage to their attachments. property. MS 271, MS 271 C, MS 291, MS 291 C...
  • Page 6 Clean plastic parts with a cloth. Harsh engine is still hot – the fuel may spill over pump (on machines so equipped). If detergents can damage the plastic. – risk of fire! MS 271, MS 271 C, MS 291, MS 291 C...
  • Page 7 – danger of immediately by moving the Master injury due to the rotating saw chain. Control lever / stop switch to STOP, 0 or †. MS 271, MS 271 C, MS 291, MS 291 C...
  • Page 8 Check the fuel system for leaks and Switch off the motor, engage the chain advice. make sure the safety devices are brake and attach the chain scabbard. working properly. Never continue using MS 271, MS 271 C, MS 291, MS 291 C...
  • Page 9 Use only spark plugs that are in perfect In the event of a chain brake condition and have been approved by malfunction, switch off the machine STIHL – see "Specifications". immediately – risk of injury! Consult a MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 10: Reactive Forces

    Be aware of the location of the guide – the wood, the chain saw may suddenly bar nose Do not cut with the guide bar nose – MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 11: Working Techniques

    In these cases, do not use a chain saw – use a hoist, winch or dragline instead. Pull out trunks that are lying about and have been cut free. Whenever possible, deal with them in open areas. MS 271, MS 271 C, MS 291, MS 291 C...
  • Page 12 If there is a risk of fire, do not and off balance. Always engage the use your chainsaw near combustible spiked bumper securely in the tree or limb. MS 271, MS 271 C, MS 291, MS 291 C...
  • Page 13 (dry, decayed or rotted wood) Make sure no-one is endangered by the falling tree – the noise of your engine may drown any warning calls. MS 271, MS 271 C, MS 291, MS 291 C...
  • Page 14 On steep slopes, plan escape – routes parallel to the slope. When walking away along the – escape path, watch out for falling limbs and watch the top of the tree. MS 271, MS 271 C, MS 291, MS 291 C...
  • Page 15 Make cuts at both sides of Leave a broader hinge on rotten the trunk at same height as bottom of – trees. MS 271, MS 271 C, MS 291, MS 291 C...
  • Page 16 Use a low kickback chain and Select felling wedges that suit the exercise particular caution diameter of the tree and width of the kerf (felling cut (E)). MS 271, MS 271 C, MS 291, MS 291 C...
  • Page 17 Do not cut into the stabilizing strap. – Continue the felling cut on the other side of the trunk. Make sure the second cut is at the same height as the first cut. MS 271, MS 271 C, MS 291, MS 291 C...
  • Page 18 Enlarge the felling cut in direction of strap horizontally at the same level holding strap (2). as the felling cut. Cut horizontally. – Do not cut into the holding strap. – MS 271, MS 271 C, MS 291, MS 291 C...
  • Page 19 Do not cut into the hinge. – Enlarge felling cut as far as holding strap (3). Do not cut into the holding strap. Shout a second warning immediately – before the tree falls. MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 20: Cutting Attachment

    Depending on the model, the scabbard beyond repair after a short period of extension either comes standard with operation. the saw or is available as a special accessory. MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 21: Mounting The Bar And Chain (Side Chain Tensioner)

    (2) butts against the left end of WARNING the housing slot. Wear work gloves to protect your hands from the sharp cutters. Fit the chain – start at the bar nose. MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 22: Mounting The Bar And Chain (Quick Chain Tensioner)

    Position the tensioning gear (1) against the guide bar (3) so that the stud (4) projects through the upper hole and the short guide peg (5) locates in the lower hole. MS 271, MS 271 C, MS 291, MS 291 C...
  • Page 23 Turn the guide bar so that the tensioning gear is facing you. Fit the chain sprocket cover so that the wingnut locates on the collar screw (3). MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 24: Tensioning The Saw Chain (Side Chain Tensioner)

    Instructions". some time. Check chain tension frequently – Check chain tension frequently – see chapter on "Operating see chapter on "Operating Instructions". Instructions". MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 25: Fuel

    Use a canister approved for storing Use only high-quality brand-name fuel. Pour oil into canister first, then gasoline with a minimum octane rating add gasoline and mix thoroughly. of 90 – leaded or unleaded. MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 26: Fueling

    The marks on the tank cap and fuel tank STIHL recommends you use the STIHL are then in alignment. filler nozzle for fuel (special accessory). Fill up with fuel. MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 27: Chain Lubricant

    Waste oil does not have the necessary lubricating properties and is unsuitable Turn the cap clockwise and lock it in for chain lubrication. position – see section on "Closing". MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 28: Filling Chain Oil Tank

    – see Close the filler cap. "Checking Chain Tension". There must still be a small amount of oil in the oil tank when the fuel tank is empty. MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 29: Chain Brake

    The hand guard is accelerated toward the bar nose – even if your left hand is not behind the hand guard, e.g. during felling cut. MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 30: Winter Operation

    (winter operation) – arrow points toward symbol r – shutter must audibly snap into place In the winter operation position, the tip of the arrow (1) is visible. MS 271, MS 271 C, MS 291, MS 291 C...
  • Page 31 – has been running for approx. one minute) When the engine has fired for the – first time After ventilation of the combustion – chamber, if the engine was flooded MS 271, MS 271 C, MS 291, MS 291 C...
  • Page 32 – to prime the fuel line. MS 271, MS 271 C, MS 291, MS 291 C...
  • Page 33 F and the engine begins to idle Position warm start n If engine is warm (once the engine – has been running for approx. one minute) Hold and start the chain saw MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 34: Operating Instructions

    A new saw chain must be retensioned – afterwards simultaneously press the more frequently than one that has been throttle trigger lockout and the throttle in use already for an extended period. trigger. MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 35: Taking Care Of The Guide Bar

    Slacken off the chain if you have retensioned it at operating Chain type Chain pitch Minimum temperature during work. groove depth Picco 1/4“ P 4.0 mm Rapid 1/4“ 4.0 mm MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 36: Shroud

    Refitting the shroud Refit the shroud and tighten the screws HD2 filter (black filter frame, pleated filter material) for extreme wintry conditions (e.g. powder or drifting snow) or very dusty work areas. MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 37: Cleaning The Air Filter

    If knocking it out or blowing it clear is not Allow air filter to dry. sufficient to remove stubborn dirt, or if Install the air filter. the filter fabric is sticky, perform the following steps: MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 38: Adjusting The Carburetor

    Speed erratic when idling; poor screw (L) clockwise as far as acceleration (despite standard setting of possible – then turn it 1/4 turn low speed adjusting screw) counterclockwise The idle setting is too lean. MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 39: Spark Arresting Screen In Muffler

    "Specifications". Rectify the problems which have caused fouling of the spark plug. Possible causes are: Too much oil in fuel mix. – Dirty air filter. – Unfavorable running conditions. – MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 40: Storing The Machine

    Insert the spark plug through the brake. grommet and screw it in by hand. Tighten down the spark plug, fit the boot and press it down firmly. Install the shroud – see "Shroud". MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 41: Maintaining And Sharpening The Saw Chain

    – risk of injury! Clean crankshaft stub and needle cage and lubricate with STIHL lubricant (special accessory) Slide needle cage onto the crankshaft stub MS 271, MS 271 C, MS 291, MS 291 C...
  • Page 42 Rough, uneven running of the saw setting, and tooth length, as well as chain, increased wear – even to the cleaning grooves and oil inlet holes. point of saw chain breakage. MS 271, MS 271 C, MS 291, MS 291 C...
  • Page 43 The depth gauge determines the depth guide bar) in accordance with the to which the cutter penetrates the wood specified angle – according to the and thus the chip thickness. MS 271, MS 271 C, MS 291, MS 291 C...
  • Page 44 (10.26) 5.5 (7/32) 5605 772 5506 5605 750 4330 1106 893 4000 0814 252 3356 5605 007 1030 consisting of file holder with round file, taper square file and file gauge MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 45: Maintenance And Care

    Check Check, pay attention to sharpness Saw chain Check chain tension Sharpen Check (wear, damage) Clean and turn over Guide bar Deburr Replace Chain sprocket Check Clean Air filter Replace MS 271, MS 271 C, MS 291, MS 291 C...
  • Page 46 STIHL recommends STIHL servicing dealers During initial use of professional chain saws (with a power output of 3.4 kW or more), tighten the cylinder block screws after 10 to 20 hours of operation MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 47: Main Parts

    20 Starter grip 21 Fuel filler cap 22 Master control lever 23 Throttle trigger 24 Throttle lever lock 25 Rear handle 26 Rear hand guard Serial number According to version MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 48: Specifications

    Rollomatic E guide bars Fuel System Cutting lengths: 37, 40, 45 cm All position diaphragm carburetor with Pitch: 3/8" (9.32 mm) integral fuel pump Groove width: 1.6 mm Nose sprocket: 11-tooth MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 49: Ordering Spare Parts

    Handle, left right modified in any way. MS 271: 4.5 m/s 4.5 m/s MS 291: 4.5 m/s 4.5 m/s MS 291 C: 4.5 m/s 4.5 m/s MS 271, MS 271 C, MS 291, MS 291 C...

  • Page 50: Maintenance And Repairs

    EN ISO 11681-1, EN 55012, EN 61000-6-1 The measured and guaranteed equivalent sound power level has been determined in accordance with Directive 2000/14/EC, Annex V, and standard ISO 9207. MS 271, MS 271 C, MS 291, MS 291 C...
  • Page 51 The year of construction and the serial number are shown on the machine. Done at Waiblingen, 28.10.2016 ANDREAS STIHL AG & Co. KG p p. Thomas Elsner Director Product Management and Services MS 271, MS 271 C, MS 291, MS 291 C...
  • Page 52 0458-574-8321-D englisch www.stihl.com *04585748321D* 0458-574-8321-D...

This manual is also suitable for:

Ms 271

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