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Stihl 441 Cm Manual

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    							MS 441 C-M
    As soon as the engine runs
    NIf the engine was started in the start 
    position } Press down trigger 
    lockout and the pull the throttle 
    trigger (2) at the same time – the 
    Master Control lever (1) moves to 
    the run position F and the engine 
    settles down to idling speed.  
    NPull the hand guard back toward the 
    front handle.
    The chain brake is now disengaged – 
    your saw is ready for operation.
    Always disengage chain brake before 
    accelerating the engine. High revs with 
    the chain brake engaged (chain locked) 
    will quickly damage the clutch and chain 
    At very low outside temperatures
    NChange over to winter operation if 
    necessary – see “Winter Operation”.
    Stopping the engine
    NMove the Master Control lever to the 
    stop position (0).
    If engine does not start
    You may have pulled the starter grip too 
    fast and too vigorously. The combustion 
    chamber is probably flooded.
    NMove the Master Control lever the 
    run positionF.
    NHold and start your saw as 
    NRemove the spark plug – see 
    "Spark Plug".
    NDry the spark plug.
    NMove the Master Control lever to the 
    stop position (0).
    NCrank the engine several times with 
    the starter to clear the combustion 
    NRefit the spark plug – see "Spark 
    NMove the Master Control lever the 
    run positionF.
    NHold and start your saw as 
    During the break-in period
    A factory new machine should not be run 
    at high revs (full throttle off load) for the 
    first three tank fillings. This avoids 
    unnecessarily high loads during the 
    break-in period. As all moving parts 
    have to bed in during the break-in 
    period, the frictional resistances in the 
    shortblock are greater during this period. 
    The engine develops its maximum 
    power after about 5 to 15 tank fillings.
    During work
    Open the throttle only when the chain 
    brake is off. Running the engine at high 
    revs with the chain brake engaged 
    (chain locked) will quickly damage the 
    engine and chain drive (clutch, chain 
    Check chain tension frequently
    A new saw chain must be retensioned 
    more frequently than one that has been 
    in use already for an extended period.
    Chain cold
    Tension is correct when the chain fits 
    snugly against the underside of the bar 
    but can still be pulled along the bar by 
    hand. Retension if necessary – see 
    "Tensioning the Saw Chain".
    219BA040 KN
    001BA186 KN
    							MS 441 C-M
    40 Chain at operating temperature
    The chain stretches and begins to sag. 
    The drive links must not come out of the 
    bar groove on the underside of the bar – 
    the chain may otherwise jump off the 
    bar. Retension the chain – see 
    "Tensioning the Saw Chain".
    The chain contracts as it cools down. If it 
    is not slackened off, it can damage the 
    crankshaft and bearings.
    After a long period of full-throttle 
    After a long period of full-throttle 
    operation, allow engine to run for a while 
    at idle speed so that the heat in the 
    engine can be dissipated by flow of 
    cooling air. This protects engine-
    mounted components (ignition, 
    carburetor) from thermal overload.
    After finishing work
    NSlacken off the chain if you have 
    retensioned it at operating 
    temperature during work.
    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 
    Short-term storage
    Wait for engine to cool down. Keep the 
    machine with a full tank of fuel in a dry 
    place, well away from sources of 
    ignition, until you need it again.Long-term storage
    See "Storing the machine"
    Varying cutting lengths, types of wood 
    and working techniques require varying 
    quantities of oil.
    Standard oil pump
    The oil delivery rate can be adjusted as 
    needed using the adjusting screw (1) 
    (on the bottom of the machine).
    Ematic setting (E), moderate oil delivery 
    rate –
    NTurn adjusting screw to "E" (Ematic 
    Increase oil delivery rate –
    NTurn the adjusting screw clockwise
    Reduce oil delivery rate –
    NTurn the adjusting screw 
    The saw chain must always be coated 
    with chain oil.
    Oil Quantity Control
    001BA157 KN
    							MS 441 C-M
    41 Oil pump with increased delivery rate 
    (available option)
    The oil pump with increased delivery 
    rate can be identified by the groove (2) 
    in the adjusting screw.
    With this oil pump, in setting rangea, the 
    oil tank can run empty before the fuel 
    tank, thus causing the saw chain to run 
    Nin setting rangea, fill the fuel tank 
    only half full or refill the oil tank 
    when the fuel tank is approximately 
    half emptyNTurn the guide bar over – every time 
    you sharpen the chain and every 
    time you replace the chain –  this 
    helps avoid one-sided wear, 
    especially at the nose and 
    underside of the bar.
    NRegularly clean the oil inlet hole (1), 
    the oilway (2) and the bar groove 
    NMeasure the groove depth – with the 
    scale on the filing gauge (special 
    accessory) – in the area used most 
    for cutting.If groove depth is less than specified:
    NReplace the guide bar.
    The drive link tangs will otherwise 
    scrape along the bottom of the groove – 
    the cutters and tie straps will not ride on 
    the bar rails.Taking Care of the Guide Bar
    typeChain pitch Minimum 
    groove depth
    Picco 1/4" P 0.16" (4.0 mm)
    Rapid 1/4" 0.16" (4.0 mm)
    3 1
    143BA026 KN
    3LFFR 3 PP
    5DSLG  PP
    5DSLG  PP 
    							MS 441 C-M
    42 The air filter system can be adapted to 
    different operating conditions by the 
    insertion of different air filters. 
    Retrofitting is simple.
    NHD2-Filter (black filter frame. folded 
    filter fabric) Universal filter for 
    almost all conditions of use (from 
    very dusty to wintry conditions etc.)
    NWire mesh filter (green filter 
    housing) Use in extra-ordinary 
    conditions e.g. extremely wintry 
    conditions of use - such as powder 
    snow or drift snow. Rather 
    unsuitable in very dusty conditions.
    When dry, STIHL filters attain a long 
    service life.
    NAlways use STIHL filters dryFouled air filters will impair engine 
    performance, increase fuel consumption 
    and make the machine more difficult to 
    NMove the Master Control lever to the 
    stop position0
    NUse a combination wrench to open 
    the clamps (1) in the direction of the 
    NRemove the carburetor box 
    cover (2)
    NUnscrew the twist lock (3) in the 
    direction of the arrow
    NRemover filter
    Air Filter System
    001BA210 KN
    001BA212 KN
    							MS 441 C-M
    43 If there is a noticeable loss of engine 
    NWash the filter in STIHL special-
    purpose cleaner (special 
    accessory) or a clean, non-
    flammable cleaning liquid (e.g., 
    warm soapy water) – rinse the filter 
    from inside to out under a water jet 
    – do not use high-pressure cleaners
    NDry all filter parts – do not expose to 
    extreme heat
    NDo not oil the filter
    NReinstall filterExhaust emissions are controlled by the 
    design of the fundamental engine 
    parameters and components (e.g. 
    carburation, ignition, timing and valve or 
    port timing) without the addition of any 
    major hardware.
    Basic information
    M-Tronic regulates the fuel quantity and 
    ignition timing for all operating states 
    M-Tronic stands for easy, fast starting, 
    constant optimum engine performance, 
    outstanding acceleration and automatic 
    adaptation to changes in operating 
    Manual carburetor adjustments are no 
    longer required – the carburetor does 
    not have any adjusting screws.
    Automatic adjustment
    Under extremely changed operating 
    conditions, attainment of the optimal 
    setting can be accelerated as follows:
    NCarry out five uniform cuts to length 
    under full load
    Cleaning the Air FilterEngine ManagementM-Tronic 
    							MS 441 C-M
    44 In some countries, the muffler is fitted 
    with a spark arresting screen.
    NIf engine performance deteriorates, 
    check the spark arresting screen in 
    the muffler
    NLet the muffler cool down
    NRemove screw (1)
    NPull out spark arresting screen (2)
    NClean the dirty spark arresting 
    screen, replace if damaged or 
    heavily carbonized
    NRefit the spark arresting screen
    NInsert and tighten down the screwIf the engine is down on power, difficult 
    to start or runs poorly at idling speed, 
    first check the spark plug.
    Install a new spark plug after approx. 
    100 operating hours or earlier if the 
    electrodes are badly eroded/corroded.
    The wrong fuel mix (too much engine oil 
    in the gasoline), a dirty air filter and 
    unfavorable running conditions (mostly 
    at part throttle etc.) affect the condition 
    of the spark plug. These factors cause 
    deposits to form on the insulator nose 
    which may degrade performance.
    Removing the spark plug
    NMove the Master Control lever to the 
    stop position (0).
    NUse the combination wrench to 
    open the fasteners (1) in the 
    direction of the arrow.
    NRemove the carburetor box 
    cover (2).NPull off the spark plug boot (3).
    NUnscrew the spark plug.
    Checking the spark plug
    NClean the spark plug if it is dirty
    NCheck the electrode gap (A) and 
    readjust if necessary – see 
    NUse only resistor type spark plugs of 
    the approved range
    Correct the problems that have caused 
    fouling of the spark plug:
    –too much oil in fuel mix,
    –dirty air filter,
    –unfavorable running conditions, e.g. 
    operating at part throttle.
    Spark Arresting Screen in 
    MufflerSpark Plug
    000BA039 KNA 
    							MS 441 C-M
    To reduce the risk of fire and burn injury, 
    use only spark plugs authorized by 
    STIHL. Always press the spark plug 
    boot (1) snugly onto the spark plug 
    terminal (2).
    Do not use a spark plug with a 
    detachable SAE adapter terminal (3). 
    Arcing may occur that could ignite 
    combustible fumes and cause a fire. 
    This can result in serious injuries or 
    damage to property. 
    NOnly use resistor type spark plugs 
    with solid, non-threaded terminals
    Installing the spark plug
    NScrew home the spark plug, fit the 
    boot and press it down firmly.
    NFit the carburetor box cover.For periods of 3 months or longer
    NDrain and clean the fuel tank in a 
    well ventilated area.
    NDispose of fuel properly in 
    accordance with local 
    environmental requirements.
    NRun the engine until the carburetor 
    is dry – this helps prevent the 
    carburetor diaphragms sticking 
    NRemove the saw chain and guide 
    bar, clean them and spray with 
    corrosion inhibiting oil.
    NThoroughly clean the machine – pay 
    special attention to the cylinder fins 
    and air filter.
    NIf you use a biological chain and bar 
    lubricant, e.g. STIHL BioPlus, 
    completely fill the chain oil tank.
    NStore the machine in a dry, high or 
    locked location, out of the reach of 
    children and other unauthorized 
    219BA033 KN
    							MS 441 C-M
    46 NRemove chain sprocket cover, saw 
    chain and guide bar.
    NRelease chain brake – pull hand 
    guard against the front handle
    Fit new chain sprocket
    –after use of two saw chains or 
    –if the wear marks (arrows) are 
    deeper than 0.02 in (0.5 mm) – 
    otherwise the service life of the saw 
    chain is reduced – use check gauge 
    (special accessory) to test
    Using two saw chains in alternation 
    helps preserve the chain sprocket.
    Use only STIHL original chain sprockets 
    to help ensure reliable functioning of the 
    chain brake.NUse a screwdriver to remove the E-
    clip (1)
    NRemove the washer (2)
    NRemove rim sprocket (3) (if so 
    equipped), clutch drum (4) and 
    needle cage (6).
    NInspect transport profile for rim 
    sprocket on the clutch drum (4) – if 
    there are also heavy signs of wear, 
    also replace the clutch drum
    NRemove clutch drum with integrated 
    spur chain sprocket (5) (if so 
    equipped) including needle cage (6) 
    from the crankshaft – for 
    powerheads with Quickstop Plus 
    chain brake system, depress 
    throttle trigger lockout beforehand
    Install spur chain sprocket / rim sprocket
    NClean crankshaft stub and needle 
    cage and lubricate with STIHL 
    lubricant (special accessory)
    NSlide needle cage onto the 
    crankshaft stub
    NAfter refitting, turn the clutch drum 
    and/or spur chain sprocket approx. 
    1 full turn so that the carrier for the 
    oil pump drive engages
    NRefit the rim sprocket – cavities 
    toward the outside
    NRefit washer and E-clip on the 
    crankshaftChecking and Replacing the 
    Chain Sprocket
    001BA121 KN
    001BA122 KN
    1 2
    2 3 6 
    							MS 441 C-M
    47 Sawing effortlessly with a properly 
    sharpened saw chain
    A properly sharpened saw chain cuts 
    through wood effortlessly even with very 
    little pushing.
    Never use a dull or damaged saw chain 
    – this leads to increased physical strain, 
    increased vibration load, unsatisfactory 
    cutting results and increased wear.
    NClean the saw chain
    NCheck the saw chain for cracks and 
    damaged rivets
    NReplace damaged or worn chain 
    components and adapt these parts 
    to the remaining parts in terms of 
    shape and level of wear – rework 
    Carbide-tipped (Duro) saw chains are 
    especially wear-resistant. For an optimal 
    sharpening result, STIHL recommends 
    STIHL servicing dealers.
    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!
    Chain pitch
    The chain pitch marking (a) is embossed 
    in the area of the depth gauge of each 
    The diameter of file to be used depends 
    on the chain pitch – see table 
    "Sharpening tools".
    The angles of the cutter must be 
    maintained during resharpening.Sharpening and side plate angles
    ASharpening angle
    STIHL saw chains are sharpened with a 
    30° sharpening angle. Ripping chains, 
    which are sharpened with a 10° 
    sharpening angle, are exceptions. 
    Ripping chains have an X in the 
    BSide plate angle
    The correct side plate angle results 
    automatically when the specified file 
    holder and file diameter are used.
    The angles must be identical for all 
    cutters in the saw chain. Varying angles: 
    Rough, uneven running of the saw 
    chain, increased wear – even to the 
    point of saw chain breakage.Maintaining and Sharpening 
    the Saw Chain
    Marking (a)Chain pitch
    Inches mm
    1 or 1/4 1/4 6.35
    6, P or PM 3/8 P 9.32
    2 or 325 0.325 8.25
    3 or 3/8 3/8 9.32
    4 or 404 0.404 10.26
    689BA027 KN
    H J 30 50
    H J 36 56
     30; 50; 
    689BA021 KN 
    							MS 441 C-M
    File holder
    NUse a file holder
    Always use a file holder (special 
    accessory, see table "Sharpening tools") 
    when sharpening saw chains by hand. 
    File holders have markings for the 
    sharpening angle.
    Use only special saw chain files! Other 
    files are unsuitable in terms of shape 
    and type of cutting.
    To check the angles
    STIHL filing gauge (special accessory, 
    see table "Sharpening tools") – a 
    universal tool for checking sharpening 
    and side plate angles, depth gauge 
    setting, and tooth length, as well as 
    cleaning grooves and oil inlet holes.
    Proper sharpening
    NSelect sharpening tools in 
    accordance with chain pitch
    NClamp guide bar if necessary
    NBlock saw chain – push the hand 
    guard forward
    NTo advance the saw chain, pull the 
    hand guard toward the handlebar: 
    The chain brake is disengaged. 
    With the Quickstop Plus chain brake 
    system, additionally press the 
    throttle trigger lockout
    NSharpen frequently, removing little 
    m a t e r i a l  –  t w o  o r  t h r e e  s t r o k e s  o f  t h e  
    file are usually sufficient for simple 
    NGuide the file: horizontally ( a t  a  r i g h t  
    angle to the side surface of the 
    guide bar) in accordance with the 
    specified angle – according to the markings on the file holder – rest the 
    file holder on the tooth head and the 
    depth gauge
    NFile only from the inside outward
    NThe file only sharpens on the 
    forward stroke – lift the file on the 
    NDo not file tie straps and drive links
    NRotate the file a little periodically in 
    order to avoid uneven wear
    NTo remove file burr, use a piece of 
    NCheck angle with file gauge
    All cutters must be equally long.
    With varying cutter lengths, the cutter 
    heights also vary and cause rough 
    running of the saw chain and chain 
    NAll cutters must be filed down equal 
    to the length of the shortest cutter – 
    ideally, one should have this done 
    by a servicing dealer using an 
    electric sharpener
    Depth gauge setting
    The depth gauge determines the depth 
    to which the cutter penetrates the wood 
    and thus the chip thickness.
    689BA025 KN
    001BA203 KN
    689BA018 KN
    689BA043 KN
    689BA023 KN
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