Stihl MS 311 Instruction Manual
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Stihl MS 311 Instruction Manual

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STIHL MS 311, 391
Instruction Manual

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Summary of Contents for Stihl MS 311

  • Page 1 STIHL MS 311, 391 Instruction Manual...

  • Page 3: Table Of Contents

    Maintaining and Sharpening the Saw Chain Maintenance and Care Main Parts Specifications Ordering Spare Parts This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process with electronic systems. MS 311, MS 391...
  • Page 4 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 Keep bystanders, especially children, injury. STIHL excludes all liability for and animals away from the work area. personal injury and damage to property The user is responsible for avoiding...
  • Page 6 (bayonet-type) in chain scabbard. This avoids the risk of have been approved by STIHL for this position, turn as far as the saw chain starting unintentionally. machine. If you have any questions in stop and fold the cliplock this respect, consult a servicing dealer.
  • 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 311, MS 391...
  • Page 8 Check condition and secure fitting – regularly and correct when possible. Store the machine in a safe, dry room. Check sharpness Have the machine repaired by a STIHL – servicing dealer if the saw chain still Never touch the saw chain when the Vibrations continues to move during idling.
  • 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 311, MS 391...
  • Page 10 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 311, MS 391...

  • 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 311, MS 391...
  • 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 311, MS 391...
  • Page 13 – be especially careful with trunk damage or Make sure no-one is endangered by the deadwood (brittle, rotten or dead falling tree – the noise of your engine wood) may drown any warning calls. MS 311, MS 391...
  • Page 14 Plan escape paths on slopes – parallel to the slope When walking away along the – escape path, watch out for falling limbs and watch the top of the tree. MS 311, MS 391...
  • Page 15 Sapwood cuts in long-fibered softwood planned – risk of accident! help prevent sapwood splintering when With rotten trunks, leave a wider the tree falls. Make cuts at both sides of – hinge the trunk at same height as bottom of MS 311, MS 391...
  • Page 16 (E)). – higher than bottom of felling until the depth of the kerf is twice the Contact the STIHL dealer for the notch (C). width of the guide bar selection of the felling wedge (suitable The holding strap (F) or stabilizing Swing the machine slowly into the length, width and height).
  • Page 17 Do not cut into the hinge – opposite side of the trunk. Make the felling cut up to the Ensure that the second cut is at the stabilizing strap (2) same level as the first cut. MS 311, MS 391...
  • Page 18 Felling Cut with Holding Strap (Leaner) A) Thin trunks Implement this felling cut when the trunk diameter is smaller than the cutting length of the chainsaw. MS 311, MS 391...
  • Page 19 (2) Do not cut into the hinge – Make the felling cut up to the holding strap (3) Do not cut into the holding strap. Shout a second warning immediately – before the tree falls. MS 311, MS 391...

  • 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 311, MS 391...

  • Page 21: Mounting The Bar And Chain

    (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 311, MS 391...

  • Page 22: Tensioning The Chain

    STIHL MotoMix Retensioning during cutting work: Shut off the engine. Shut off the engine. Wear work gloves to protect your STIHL recommends the use of STIHL hands. Loosen the nuts. MotoMix. This ready-to-use fuel mix The chain must fit snugly against contains no benzol or lead, has a high Hold the bar nose up.

  • Page 23: Fueling

    Engine Oil can quickly make the fuel mix unusable. If you mix the fuel yourself, use only STIHL MotoMix may be stored for up to STIHL two-stroke engine oil or another 2 years without any problems. high-performance engine oil in...
  • Page 24 Take care not to spill fuel while fueling 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 the fuel tank.

  • 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: Checking Chain Lubrication

    Check chain lubrication, clean the oilways, contact your dealer for assistance if necessary STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing Locking the chain dealer.

  • Page 27: Winter Operation

    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: Loosen screws (1)

  • Page 28: Starting / Stopping The Engine

    In case of erratic idling behavior or poor (arrows) and fasten with the squeezed. acceleration screws (2) Choke shutter closed (l) – this position Turn the low speed screw (L) is used to start a cold engine. 1/4 turn counterclockwise MS 311, MS 391...
  • Page 29 Starting throttle position (n) if the engine is warm, i.e. if it has – been running for about one minute. after engine begins to fire, – after clearing a flooded combustion – chamber. MS 311, MS 391...
  • Page 30 – out-of-service period, it may be been running for about one minute. necessary to pull the starter rope several Hold and start your saw as times to prime the fuel system. described. MS 311, MS 391...
  • Page 31 If you have moved the Master Control lever from the starting throttle position (n) to the stop position (0) – depress the trigger lockout and throttle trigger at the same time. MS 311, MS 391...

  • 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 311, MS 391...

  • Page 33: Oil Quantity Control

    (special accessory) – in the area with the greatest wear NOTICE Chain type Chain pitch Minimum The chain must always be wetted with a groove depth film of lubricant. Picco 1/4“ P 4.0 mm Rapid 1/4“ 4.0 mm MS 311, MS 391...

  • Page 34: Cleaning The Air Filter

    Always replace a damaged filter. the filter housing and turn it clockwise at the same time until it Cleaning the air filter engages – the "STIHL" name must Wash the filter in STIHL special be horizontal. cleaner (special accessory) or a Install the shroud.

  • Page 35: Adjusting The Carburetor

    – then back it off 1 1/2 turns. Standard setting B carefully clockwise until it is against its seat, then turn it back 1 full turn High speed screw (H) = 3/4 – Low speed screw (L) = 1/4 – MS 311, MS 391...

  • Page 36: Spark Arresting Screen In Muffler

    A slight correction of the setting may be necessary if the engine does not run satisfactorily: Carry out standard setting. Warm up the engine. Turn high speed screw (H) slightly clockwise (leaner) – no further than stop. MS 311, MS 391...

  • Page 37: Spark Plug

    Install Pull off the spark plug boot only suppressed spark plugs of the WARNING type approved by STIHL – see Unscrew spark plug "Specifications". Arcing may occur if the adapter nut (1) is loose or missing. Working in an easily...

  • Page 38: Storing The Machine

    (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

    Compliance with the angles and dimensions listed below is absolutely necessary. An improperly sharpened saw chain – especially depth gauges that are too low – can lead to increased kickback tendency of the chain saw – risk of injury! MS 311, MS 391...
  • Page 40 With the Quickstop Super chain Sharpening angle Use a file holder brake system, additionally press the STIHL saw chains are sharpened with a Always use a file holder (special throttle trigger lockout 30° sharpening angle. Ripping chains, accessory, see table "Sharpening tools") Sharpen frequently, removing little which are sharpened with a 10°...
  • Page 41 – if the depth gauge gauge protrudes past the file gauge, the depth gauge must be reworked The depth gauge determines the depth to which the cutter penetrates the wood and thus the chip thickness. MS 311, MS 391...
  • 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 311, MS 391...

  • Page 43: Maintenance And Care

    Lubricating oil tank Clean Chain lubrication check Check, pay attention to sharpness Saw chain Checking the chain tension sharpen Check (wear, damage) Clean and turn over Guide bar Deburr replace Chain sprocket check Clean Air filter replace MS 311, MS 391...
  • Page 44 Safety information label replace STIHL recommends STIHL servicing dealer When using professional chainsaws (with a power output of 3.4 kW or more) for the first time, tighten the cylinder block screws after 10 to 20 hours of operation MS 311, MS 391...

  • Page 45: Main Parts

    Screen, not available in all markets) 16 Front hand guard 17 Front handle (handlebar) 18 Starter grip 19 Fuel filler cap 20 Master Control Lever 21 Throttle trigger 22 Throttle trigger lockout 23 Rear handle 24 Rear hand guard Serial Number MS 311, MS 391...

  • Page 46: Specifications

    27.5 m/s Fully automatic, speed-controlled oil Chain speed at maximum pump with rotary piston. Additional power: 21.7 m/s STIHL single cylinder two-stroke engine manual oil flow control Noise and Vibration Data MS 311 Oil tank capacity: 350 cc (0.35 l) Displacement: 59.0 cc...

  • Page 47: Guide To Using This Manual 2 Maintenance And Repairs

    Serial number determined on a representative engine approved by STIHL for this power tool or in accordance with a standardized test are technically identical. Only use high- procedure under laboratory conditions quality replacement parts in order to...

  • Page 48: Safety Precautions 3 Disposal

    Type: MS 311 MS 311: K-EG-2009/5202 MS 391 MS 391: K-EG-2009/5143 STIHL products must not be thrown in Serial identification the garbage can. Take the product, The technical documentation has been number: 1140 accessories and packaging to an retained by:...
  • Page 49 English MS 311, MS 391...
  • Page 50 English MS 311, MS 391...
  • Page 52 0458-542-8321-C www.stihl.com *04585428321C* 0458-542-8321-C...

This manual is also suitable for:

Ms 391

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