Stihl MS 240 Instruction Manual
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Stihl MS 240 Instruction Manual

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STIHL MS 240
Instruction Manual

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  • Page 1 STIHL MS 240 Instruction Manual...

  • Page 3: Table Of Contents

    Storing the Machine Thank you for choosing a quality Safety Precautions and Working Checking and Replacing the Chain Techniques Sprocket engineered STIHL product. Cutting Attachment Maintaining and Sharpening the This machine has been built using Saw Chain modern production techniques and...

  • Page 4: Guide To Using This Manual

    Have your dealer or other Engineering improvements experienced user show you how to operate your power tool or attend a STIHL's philosophy is to continually special course in its operation. Ematic; chain oil flow improve all of its products. For this...
  • Page 5 STIHL recommends the use of STIHL The use of noise emitting power tools original tools, guide bars, chains, chain may be restricted to certain times by sprockets and accessories.
  • Page 6 Place the unit on firm ground in an open Make sure you always have good area. Make sure you have good balance balance and secure footing. and secure footing. Hold the unit securely. The cutting attachment must MS 240...
  • Page 7 – Shut off the engine and wait until the The most common reactive forces that chain comes to a complete stanstill. occur during cutting are: kickback, pushback and pull-in. – Check condition – Check sharpness. MS 240...
  • Page 8 – Be aware of the location of the guide tree or limb. bar nose at all times. – Do not cut with the bar nose. – Take special care with small, tough limbs, they may catch the chain. MS 240...
  • Page 9 Do not work above shoulder height Do not underbuck freely hanging limbs. extent of the dangers is complicated, if – Never operate your unit with one not impossible. Use aids such as a cable hand winch or tractor in such cases. MS 240...
  • Page 10 Remove large buttress roots: Make the vertical cut first, then the horizontal – but only if the wood is Maintain a distance of at least 2 1/2 tree Direction of fall sound lengths from the next felling site. MS 240...
  • Page 11 Sapwood cuts in long-fibered softwood techniques. STIHL recommends the following help prevent sapwood splintering when method: the tree falls. Make cuts at both sides of the trunk at same height as bottom of Make the horizontal cut –...
  • Page 12 This is the hinge. Drive wedges into the felling cut in good time. Use only wooden, aluminum or plastic wedges. Never steel, which can damage the chain and cause kickback. MS 240...
  • Page 13 For felling leaners – If tree diameter is more than twice – For relieving cuts during bucking the length of the guide bar. – For DIY projects – If a large portion of heartwood remains uncut on large diameter trees. MS 240...
  • Page 14 – take extra – Never cut several limbs at once. care since there is an increased danger of kickback. Make relieving cut at the compression side (1) Make bucking cut at the tension side (2) MS 240...
  • Page 15 Use only a spark plug of the type fuel vapour – health risk. approved by STIHL and make sure it is Service the machine regularly. Do not To reduce the risk of injury, shut off the in good condition –...

  • Page 16: Cutting Attachment

    Disengaging the chain brake. Cutting Attachment Mounting the Bar and Chain (side chain tensioner) STIHL is the only manufacturer in the industry to produce its own chain saws, Removing the chain sprocket cover guide bars, saw chains and chain sprockets.

  • Page 17: Mounting The Bar And Chain (Front Chain Tensioner)

    Turn the screw (1) Wear work gloves to protect your counterclockwise until the hands from the sharp cutters. tensioning nut (2) butts against the Fit the chain – start at the bar nose. left end of the housing slot. MS 240...

  • Page 18: Tensioning The Saw Chain (Side Chain Tensioner)

    Check chain tension frequently – Check chain tension frequently – see chapter on "Operating see chapter on "Operating Instructions". Instructions". MS 240...

  • Page 19: Checking Chain Tension

    STIHL engines and along the bar by hand. If STIHL two-stroke engine oil is not guarantees a long engine life. available, use only quality two-stroke oil If necessary, retension the chain.

  • Page 20: Fueling

    3 months. Exposure to light, the sun, low or high STIHL recommends you use the STIHL temperatures can quickly make the fuel filler nozzle for fuel (special accessory). mix unusable.
  • Page 21 Bottom of cap is twisted in relation to position. position. top: Turn and lock the cap clockwise – see sections on "Closing" and "Checking security of cap". Fold the grip flush with the top of the cap. MS 240...

  • Page 22: Chain Lubricant

    Take care not to spill chain oil while refilling and do not overfill the tank. STIHL recommends you use the STIHL filler nozzle for chain oil (special accessory). Close the filler cap. There must still be a small amount of oil in the oil tank when the fuel tank is empty.

  • Page 23: Checking Chain Lubrication

    "Checking Chain Tension". stopped and locked. enough: 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 240...

  • Page 24: Winter Operation

    Heated air is now drawn in from around have servicing and repair work carried the cylinder and mixed with cold air – Lift off the carburetor box cover out exclusively by an authorized STIHL this helps prevent carburetor icing. vertically. servicing dealer. Maintain the following servicing intervals: At temperatures below -10°C...

  • Page 25: Starting / Stopping The Engine

    – If the engine is warm, i.e. if it has been running for about one minute. – When the engine begins to fire. – After clearing a flooded combustion chamber. MS 240...
  • Page 26 If the engine is new or after a long under the handle. out-of-service period, it may be Put your right foot into the rear necessary to pull the starter rope several handle and press down. times to prime the fuel system. MS 240...
  • Page 27 Master Control lever (1) moves Hold and start your saw as to the run position F and the engine described. settles down to idling speed. MS 240...

  • Page 28: Operating Instructions

    Check chain tension frequently stop position (0). A new saw chain must be retensioned Change over to winter operation if more frequently than one that has been necessary – see “Winter in use already for an extended period. Operation”. MS 240...

  • Page 29: Oil Quantity Control

    Always slacken off the chain again after finishing work. The chain contracts as it cools down. If it is not slackened off, it can damage the crankshaft and bearings. MS 240...

  • Page 30: Taking Care Of The Guide Bar

    (special accessory) – in the area used most for cutting. Chain type Pitch Minimum groove depth Picco 3/8" P 5.0 mm Rapid 1/4“ 4.0 mm Rapid 3/8“; 0.325“ 6.0 mm Rapid 0.404“ 7.0 mm MS 240...

  • Page 31: Cleaning The Air Filter

    Clean away loose dirt from around outwards. the filter. If filter is caked with dirt: Wash the filter in STIHL special cleaner (special accessory) or a clean, non-flammable solution (e.g. warm soapy water) and then dry. Do not use a brush to clean the fleece filter.

  • Page 32: Adjusting The Carburetor

    Turn the idle speed screw (LA) counterclockwise until the chain stops moving – then turn it another 1/4 turn in the same direction. If the chain continues moving when the engine is idling, have your saw checked and repaired by your servicing dealer. MS 240...

  • Page 33: Spark Arresting Screen In Muffler

    50 : 1 mixture of unleaded gasoline speed, first check the spark plug. If the engine is down on power, and STIHL two-stroke engine oil or check the spark arresting screen in Fit a new spark plug after about 100 equivalent two-stroke engine oil –...

  • Page 34: Replacing The Starter Rope And Rewind Spring

    Carefully remove the rope rotor with washer (3) and pawl (4). – Dirty air filter. – Unfavorable running conditions. The rewind spring may pop out and uncoil during this operation – take care to avoid risk of injury. MS 240...
  • Page 35 Refit the cap in the grip. – see illustration. overtensioned and could break. Thread the rope through the rotor Take one turn of the rope off the and secure it with a simple rotor. overhand knot. Refit the fan housing. MS 240...

  • Page 36: Storing The Machine

    STIHL recommends use of original Fit the rope rotor and tension the STIHL chain sprockets in order to rewind spring. ensure optimal functioning of the chain Refit the fan housing and secure it in brake.

  • Page 37: Maintaining And Sharpening The Saw Chain

    Maintaining and sprocket Sharpening the Saw Chain Clean crankshaft stub and needle Sawing effortlessly with a properly cage and lubricate with STIHL sharpened saw chain lubricant (special accessory) Slide needle cage onto the A properly sharpened saw chain cuts crankshaft stub...
  • Page 38 The chain pitch marking (a) is embossed ping chain) in the area of the depth gauge of each Tooth shapes cutter. STIHL filing gauge (special accessory, Micro = semi-chisel tooth see table "Sharpening tools") – a Marking (a) Chain pitch...
  • Page 39 To remove file burr, use a piece of (6.35) 0,65 (0.026) hardwood 3/8 P (9.32) 0,65 (0.026) Check angle with file gauge 0.325 (8.25) 0,65 (0.026) All cutters must be equally long. (9.32) 0,65 (0.026) 0.404 (10.26) 0,80 (0.031) MS 240...
  • Page 40 0814 252 3356 5605 007 1029 0.404 (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 240...

  • Page 41: Maintenance And Care

    Chain Lubrication Check Inspect, also check 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 Check Anti-vibration elements Have replaced by dealer MS 240...
  • Page 42 Clean, replace if necessary Check Chain catcher Replace Safety labels Replace STIHL recommends a STIHL servicing dealer. Firmly tighten down the cylinder base screws of professional saws (3.4 kW or more) after 10 to 20 hours of operation. MS 240...

  • Page 43: Minimize Wear And Avoid Damage

    English servicing dealer. STIHL dealers are Minimize Wear and Avoid regularly given the opportunity to attend 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 44: Main Parts

    15 Front hand guard 16 Front handle (handlebar) 17 Decompression valve (depending on model) 18 Starter grip 19 Fuel filler cap 20 Master Control lever 21 Throttle trigger 22 Throttle trigger interlock 23 Rear handle 24 Rear hand guard Serial number MS 240...

  • Page 45: Specifications

    Right handle: 4.4 m/s Cutting Attachment The K-factor in accordance with Directive 2006/42/EC is 2.5 dB(A) for STIHL single cylinder two-stroke engine the sound pressure level and sound Rollomatic guide bars Displacement: 41.6 cm power level; the K-factor in accordance with Directive 2006/42/EC is 2.0 m/s...

  • Page 46: Special Accessories

    English – STIHL lubricating grease Special Accessories Ordering Spare Parts – STIHL filler nozzle for fuel – helps avoid spills and overfilling during Please enter your saw model, serial refueling Chain scabbard number as well as the part numbers of –...

  • Page 47: Maintenance And Repairs

    When repairing the machine, only use Directives 2006/42/EC, 2004/108/EC replacement parts which have been and 2000/14/EC and has been approved by STIHL for this power tool or Elsner developed and manufactured in are technically identical. Only use high- compliance with the following...

  • Page 48: Quality Certification

    All STIHL products comply with the highest quality standards. An independent organization has certified that all products manufactured by STIHL meet the strict requirements of the ISO 9001 standard for quality management systems in terms of product development, materials purchasing, production, assembly, documentation and customer service.
  • Page 49 English MS 240...
  • Page 50 English MS 240...
  • Page 52 0458-165-0121 englisch www.stihl.com *04581650121* 0458-165-0121...

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