Stihl MS 661 Instruction Manual
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Stihl MS 661 Instruction Manual

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Summary of Contents for Stihl MS 661

  • Page 1 STIHL MS 661 Instruction Manual...

  • Page 3: Table Of Contents

    Dear Customer, Guide to Using this Manual Specifications Safety Precautions Special Accessories Thank you for choosing a quality engineered STIHL product. Reactive Forces Ordering Spare Parts It has been built using modern Working Techniques Maintenance and Repairs production techniques and...

  • Page 4: Guide To Using This Manual

    STIHL's philosophy is to continually This Instruction Manual refers to a improve all of its products. For this Intake air baffle: summer STIHL chain saw, also called a machine reason we may modify the design, operation in this Instruction Manual.

  • Page 5: Safety Precautions

    Special safety precau- Children, animals and bystanders must injury. STIHL excludes all liability for tions must be observed remain at a distance. personal injury and damage to property when using a chain saw...
  • Page 6 (bayonet-type) in engage the chain brake and attach the have been approved by STIHL for this position, turn as far as chain scabbard. This avoids the risk of machine. If you have any questions in stop and fold the cliplock the engine starting unintentionally.
  • Page 7 Always hold the chain saw firmly with The chain saw should only be used if it both hands: Right hand on the rear is in full working order – risk of accident! handle – even if you are left-handed. To MS 661...
  • Page 8 Store the machine in a safe, dry room. regularly and correct when possible. Never touch the saw chain when the Have the machine repaired by a STIHL engine is running. If the saw chain Vibrations servicing dealer if the saw chain still becomes jammed by an object, switch continues to move during idling.
  • Page 9 In the event of a chain brake condition and have been approved by malfunction, switch off the machine STIHL – see "Specifications". Maintenance and repairs immediately – risk of injury! Consult a Check ignition lead (insulation in good servicing dealer – do not use the condition, secure connection).

  • Page 10: Reactive Forces

    Always cut at full throttle – caught or encounters a foreign object in 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 661...

  • 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 661...
  • 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 materials, dry plants or scrub. Always limb. contact your local forest authority for information on a possible fire risk. MS 661...
  • Page 13 – other than helpers. chain will otherwise be damaged. of deadwood (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 661...
  • 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 661...
  • Page 15 Make cuts at both sides of Leave a broader hinge on rotten the trunk at same height as bottom of – trees. MS 661...
  • Page 16 English The tree is felled with the felling cut (E). Begin cut by applying the lower Contact your STIHL dealer for advice on portion of the guide bar nose – do selecting the right felling wedge (length, Cut horizontally. –...
  • Page 17 Do not cut into the stabilizing strap. – stabilizing strap (3). 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 661...
  • Page 18 Keeping the saw at arm's length, cut through the stabilizing strap at a Enlarge the felling cut in direction of downward angle from outside. holding strap (2). Cut horizontally. – Do not cut into the holding strap. – MS 661...
  • Page 19 Enlarge felling cut as far as hinge (2). 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 661...

  • Page 20: Cutting Attachment

    If non-matching components are used, the cutting attachment may be damaged 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 661...

  • Page 21: Mounting The Bar And Chain

    Put on protective gloves – risk of injury Turn screw (1) to the left until the by the sharp cutters tensioner slide (2) butts against the Fit the chain starting at the nose of left end of the housing slot the guide bar MS 661...

  • Page 22: Tensioning The Chain

    Use a screwdriver to turn the still be possible to pull the chain STIHL MotoMix is blended with STIHL tensioning screw (1) clockwise until along the bar by hand. HP Ultra two-stroke engine oil for the chain fits snugly against the If necessary, retension the chain.
  • Page 23 Use only high-quality two-stroke engine protected against light and sunlight. oil – ideally STIHL HP, HP Super or Fuel mixture ages – mix only as much as HP Ultra two-stroke engine oil, as they needed for a few weeks.

  • Page 24: Fueling

    Raise the grip until it is upright. and do not overfill the tank. 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.

  • Page 25: Chain Lubricant

    Biological chain oil must be resistant to Right: Bottom of cap in correct posi- aging (e.g. STIHL BioPlus), since it will tion – inner mark is under the otherwise quickly turn to resin. This grip. It is not in line with the results in hard deposits that are difficult outer mark.

  • Page 26: Filling Chain Oil Tank

    STIHL recommends use of the STIHL The saw chain must always throw off a filling system for chain oil (special Always position the machine so that small amount of oil.

  • Page 27: Chain Brake

    It is necessary to have it serviced and maintained regularly by trained personnel. STIHL recommends that you have servicing and repair work carried Pull the hand guard back toward the out exclusively by an authorized STIHL front handle, servicing dealer. Maintain the following servicing intervals: NOTICE...

  • Page 28: Winter Operation

    (frost formation) – after starting, bring the engine up to operating NOTICE temperature at increased idle speed otherwise risk of engine malfunction due (disengage chain brake!) to overheating! If engine trouble occurs, first return the slide from winter to summer position. MS 661...

  • Page 29: Starting / Stopping The Engine

    There are two ways to hold the chain Adjusting the master control lever saw during starting. The throttle trigger lockout and throttle trigger must be pressed simultaneously to adjust the master control lever from run F to cold start l. MS 661...
  • Page 30 With a new engine or after a long period of disuse, with machines without an additional manual fuel pump, it may be necessary to pull the starter rope several times – to prime the fuel line. MS 661...
  • Page 31 F and the engine begins to idle minute) stop position 0 Hold and start the chain saw If the engine does not start Check if all operating elements are set correctly Check whether there is fuel in the tank and refuel if necessary MS 661...

  • Page 32: Operating Instructions

    Slacken off the chain if you have retensioned it at operating Check chain tension frequently temperature during work. A new saw chain must be retensioned more frequently than one that has been in use already for an extended period. MS 661...

  • Page 33: Oil Quantity Control

    To reduce oil flow – turn the adjusting screw NOTICE counterclockwise If an increased oil flow is no longer required, reset the adjusting screw to the standard setting. NOTICE The saw chain must always be coated with oil. MS 661...

  • Page 34: Taking Care Of The Guide Bar

    Periodically clean the oil inlet hole (1), oil outlet channel (2) and bar groove (3) Measure groove depth – using the measuring tool on the file gauge (special accessory) – in the area with the greatest wear MS 661...

  • Page 35: Cleaning The Air Filter

    Thorough filter cleaning Switching off the engine Saw chain rotates at idle speed Wash the filter in STIHL special- Check the air filter – clean or replace Turn the idle speed screw (LA) purpose cleaner (special it if necessary...

  • Page 36: Spark Plug

    Let the engine warm up electrodes are badly eroded. Install only suppressed spark plugs of the Turn the high speed adjusting type approved by STIHL – see screw (H) slightly clockwise (leaner) "Specifications". – max. up to the stop Clean dirty spark plug.

  • Page 37: Rewind Starter

    Have a damaged starter rope replaced Thoroughly clean the machine – pay by your dealer before it breaks special attention to the cylinder fins completely. STIHL recommends that and air filter. you have servicing and repair work If you use a biological chain and bar carried out exclusively by an authorized lubricant, e.g.

  • Page 38: Checking And Replacing The Chain Sprocket

    (5) including needle cage (6) from the crankshaft – with STIHL recommends use of original QuickStop Super chain brake, press STIHL chain sprockets in order to throttle trigger lockout beforehand ensure optimal functioning of the chain brake. Install spur chain sprocket / rim sprocket...

  • Page 39: Maintaining And Sharpening The Saw Chain

    The chain pitch marking (a) is embossed Sharpening angle increased vibration load, unsatisfactory in the area of the depth gauge of each STIHL saw chains are sharpened with a cutting results and increased wear. cutter. 30° sharpening angle. Ripping chains, Clean the saw chain which are sharpened with a 10°...
  • Page 40 90° electric sharpener Depth gauge setting STIHL filing gauge (special accessory, see table "Sharpening tools") – a universal tool for checking sharpening and side plate angles, depth gauge Guide the file: horizontally (at a right...
  • Page 41 – if the depth gauge gauge protrudes past the file gauge, the depth gauge must be reworked MS 661...
  • Page 42 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 661...

  • Page 43: Maintenance And Care

    Replace Fuel tank Clean Chain oil tank Clean Chain Lubrication Check Inspect, also check sharpness Chain Check chain tension Sharpen Check (wear, damage) Clean and turn over Guide bar Deburr Replace Chain sprocket Check Clean Air filter Replace MS 661...
  • Page 44 Decoke after first 139 hours of operation, then Exhaust port every 150 hours of operation 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 661...

  • Page 45: 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 46: Main Parts

    14 Front hand guard 15 Front handle (handlebar) 16 Decompression valve 17 Starter grip 18 Fuel filler cap 19 Master control lever 20 Throttle trigger 21 Throttle trigger lockout 22 Rear handle 23 Rear hand guard Machine number MS 661...

  • Page 47: Specifications

    2800 rpm lengths 40, 45, than the maximum chain speed to 50 cm according to ISO 11681 +/- 50 rpm ISO 11681. Contact the STIHL dealer 11-tooth with cutting when selecting the personal protective lengths 40, 45, 50, equipment. Ignition system...

  • Page 48: Special Accessories

    Registration, Evaluation, STIHL lubricating grease – Authorisation and Restriction of The guide bar and saw chain are subject STIHL filler nozzle for fuel – helps – Chemical substances. to normal wear and tear. When avoid spills and overfilling during...

  • Page 49: Maintenance And Repairs

    2000/14/EC and has been approved by STIHL for this power tool or approved disposal site for environment- developed and built in compliance with are technically identical. Only use high- friendly recycling.
  • Page 50 English Certification No.: K-EG-2012/6332 The technical documentation has been retained by: ANDREAS STIHL AG & Co. KG Product approval The year of construction and the serial number are shown on the machine. Waiblingen, 01.01.2013 ANDREAS STIHL AG & Co. KG p p.
  • Page 52 0458-758-0121-A englisch www.stihl.com *04587580121A* 0458-758-0121-A...

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