Home > Stihl > Saw > Stihl 241 Cm Manual

Stihl 241 Cm Manual

    Download as PDF Print this page Share this page

    Have a look at the manual Stihl 241 Cm Manual online for free. It’s possible to download the document as PDF or print. UserManuals.tech offer 52 Stihl manuals and user’s guides for free. Share the user manual or guide on Facebook, Twitter or Google+.

    							MS 241 C-M
    English
    29
    Opening
    NRaise handle.
    NTwist filler cap counterclockwise 
    (approx. 1/4 turn).
    Markings on filler cap and housing must 
    align.NRemove the filler cap.
    Refueling
    Take care not to spill fuel while fueling 
    and do not overfill the tank – leave 
    approx. 1/2" (13 mm) air space.
    Closing
    Handle is in an upright position:
    NPosition filler cap – markings on filler 
    cap and housing must align.
    NPush the filler cap down as far as it 
    will go.NPush the filler cap down and twist it 
    clockwise until it engages.
    Then the markings on filler cap and 
    housing will align.
    NFlip the handle down.
    001BA236 KN
    001BA232 KN
    001BA234 KN
    001BA237 KN
    001BA234 KN
    001BA233 KN
    001BA231 KN
    001BA235 KN 
    						
    							MS 241 C-M
    English
    30 Filler cap is now closed.
    If the filler cap will not engage into the 
    tank housing
    The base of the filler cap is rotated in 
    relation to the upper part.
    NLook at the black alignment marks 
    on the top of the filler cap.NWith the filler cap in the filling neck, 
    twist it counterclockwise until it 
    drops into its seat.
    NContinue to twist the filler cap 
    counterclockwise (approx. 1/4 turn) 
    – this will twist the base of the cap 
    into the correct position.
    NWhile pushing down on the cap, 
    twist the filler cap clockwise and 
    close it – see section "Closing."For automatic and reliable lubrication of 
    the chain and guide bar – use only an 
    environmentally compatible quality 
    chain and bar lubricant. Rapidly 
    biodegradable STIHL BioPlus is 
    recommended.
    NOTICE
    Biological chain oil must be resistant to 
    aging (e.g. STIHL BioPlus),  since it will 
    otherwise quickly turn to resin. This 
    results in hard deposits that are difficult 
    to remove, especially in the area of the 
    chain drive and chain. It may even cause 
    the oil pump to seize.
    The service life of the chain and guide 
    bar depends on the quality of the 
    lubricant. It is therefore essential to use 
    only a specially formulated chain 
    lubricant.
    WARNING
    Do not use waste oil. Renewed contact 
    with waste oil can cause skin cancer. 
    Moreover, waste oil is environmentally 
    harmful.
    NOTICE
    Waste oil does not have the necessary 
    lubricating properties and is unsuitable 
    for chain lubrication. Left: Base of filler cap is rotated – 
    interior marking (1) is aligned 
    with the exterior marking.
    Right: Base of filler cap is in the cor-
    rect position – interior 
    marking is below the clip. It 
    does not align with the exte-
    rior marking.
    001BA241 KN
    1
    001BA238 KN
    001BA239 KN
    &KDLQ/XEULFDQW 
    						
    							MS 241 C-M
    English
    31
    Preparations
    NThoroughly clean the oil filler cap 
    and the area around it to ensure that 
    no dirt falls into the tank.
    NPosition the machine so that the 
    filler cap is facing up.
    NOpen the filler cap.
    Filling chain oil tank
    NRefill the chain oil tank every time 
    you refuel.
    Take care not to spill chain oil while 
    refilling and do not overfill the tank.
    NClose the filler cap.
    There must still be a small amount of oil 
    in the oil tank when the fuel tank is 
    empty.
    If the oil level in the tank does not go 
    down, the reason may be a fault in the oil 
    supply system: 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 
    dealer.
    The saw chain must always throw off a 
    small amount of oil.
    NOTICE
    Never operate your saw without chain 
    lubrication. If the chain runs dry, the 
    whole cutting attachment will be 
    irretrievably damaged within a very short 
    time. Always check chain lubrication and 
    the oil level in the tank before starting 
    work.
    Every new chain has to be broken in for 
    about 2 to 3 minutes.
    After breaking in the chain, check chain 
    tension and adjust if necessary – see 
    "Checking Chain Tension".
    Filling Chain Oil Tank
    001BA158 KN
    &KHFNLQJ&KDLQ/XEULFDWLRQ
    143BA024 KN 
    						
    							MS 241 C-M
    English
    32
    Locking chain with chain brake
    –in an emergency
    –when starting
    –at idling speed
    The chain is stopped and locked when 
    the hand guard is pushed toward the bar 
    nose by the left hand – or when brake is 
    activated by inertia in certain kickback 
    situations.
    Releasing the chain brake
    NPull the hand guard back toward the 
    front handle.
    NOTICE
    Always disengage chain brake before 
    accelerating engine and before starting 
    cutting work. The only exception to this 
    rule is when you check operation of the 
    chain brake.
    High revs with the chain brake engaged 
    (chain locked) will quickly damage the 
    powerhead and chain drive (clutch, 
    chain brake).
    The chain brake is designed to be 
    activated also by the inertia of the front 
    hand guard
    if the forces are sufficiently high. The 
    hand guard is accelerated toward the 
    bar nose - even if your left hand is not 
    behind the hand guard, e.g. during a felling cut. The chain brake will operate 
    only if it has been properly maintained 
    and the hand guard has not been 
    modified in any way.
    Check operation of chain brake
    Before starting work: Run engine at idle 
    speed, engage the chain brake (push 
    hand guard toward bar nose). 
    Accelerate up to full throttle for no more 
    than 3 seconds – the chain must not 
    rotate. The hand guard must be free 
    from dirt and move freely.
    Chain brake maintenance
    The chain brake is subject to normal 
    wear. It is necessary to have it serviced 
    and maintained regularly by trained 
    personnel, such as your STIHL servicing 
    dealer, at the following intervals:
    Chain Brake
    143BA011 KN
    143BA012 KN
    )XOOWLPHXVDJH HYHU\
    PRQWKV
    3DUWWLPHXVDJH HYHU\
    PRQWKV
    2FFDVLRQDOXVDJH HYHU\
    PRQWKV 
    						
    							MS 241 C-M
    English
    33
    Pre-heating carburetor
    NRemove the shroud – see "Shroud"
    At temperatures under +50 °F (+10 °C)
    NUsing a screwdriver, pry the shutter 
    out of thes (summer operation) 
    position
    NPlace the shutter with the opening in 
    the direction of the chain saw in 
    ther position (winter operation) – 
    shutter must audibly snap into place
    NFit the shroud – see "Shroud"Heated air is now drawn in from around 
    the cylinder and circulates around the 
    carburetor – this helps prevent 
    carburetor icing.
    At temperatures above +70 °F (+20 °C)
    NEnsure that the shutter is always 
    returned to position s (summer 
    operation), otherwise the engine 
    may malfunction due to overheating
    At temperatures below +14 °F (-
    10 °C)
    Under extreme winter conditions 
    (temperatures below +14 °F (-
    10 °C), 
    powdered or drifting snow), it is 
    recommended to use the "cover plate 
    mounting kit" (special accessory). The 
    mounting kit keeps out powdered or 
    drifting snow.
    NIf the chain saw is extremely cold 
    (frost formation) – after starting, 
    bring the engine up to operating 
    temperature at medium speed 
    (disengage chain brake!)
    Mounting the cover plate (special 
    accessory)
    NInsert cover plate (1) with both tabs 
    (arrows) and fasten with screws (2)When the mounting kit is used, the 
    shutter must be in the winter position.
    If engine trouble occurs, first check 
    whether use of the cover plate is 
    necessary.
    Winter Operation
    2410BA012 KN
    2410BA013 KN
    2410BA014 KN
    1 
    						
    							MS 241 C-M
    English
    34
    Positions of Master Control Lever
    STOP or † – Master Control lever must 
    be pushed in direction of STOP or † to 
    switch off ignition. The Master Control 
    lever springs back to the run positionF 
    when it is released.
    WARNING
    The ignition is switched on again 
    automatically after the engine stops. 
    Engine can be started by operating the 
    rewind starter.
    Normal run position(F) – engine runs or 
    can fire.
    Start} – the engine is started in this 
    position.
    Setting the Master Control Lever
    To move the Master Control lever from 
    the run positionF to start}, depress 
    the trigger lockout and the throttle trigger 
    and hold them in that position – set the 
    Master Control lever to start} and let 
    go of the throttle trigger and trigger 
    lockout.
    The Master Control lever moves from 
    the start position (}) to the run 
    position (F) when you press down the 
    throttle trigger lockout and squeeze the 
    throttle trigger at the same time.
    To switch off the engine, move the 
    Master Control lever in the direction of 
    STOP o r  † – when released, the Master 
    Control lever springs back to the run 
    positionF.
    Holding the Saw
    There are two ways of holding the saw 
    when starting.On the ground 
    NPlace your saw on the ground. 
    Make sure you have a firm footing – 
    check that the chain is not touching 
    any object or the ground.
    NHold the saw firmly on the ground 
    with your left hand on the front 
    handle – your thumb should be 
    under the handle.
    NPut your right foot into the rear 
    handle or your right heel on the rear 
    hand guard and press down.
    Starting / Stopping the 
    Engine
    1166BA025 AM
    2410BA025 KN 
    						
    							MS 241 C-M
    English
    35 Between knees or thighs
    NHold the rear handle tightly between 
    your legs, just above the knees.
    NHold the front handle firmly with 
    your left hand – your thumb should 
    be under the handle.
    Cranking
    NPull the starter grip slowly with your 
    right hand until you feel it engage – 
    and then give it a brisk strong pull 
    and push down the front handle at 
    the same time. Do not pull out the 
    starter rope to full length – it might 
    otherwise break. Do not let the 
    starter grip snap back. Guide it 
    slowly back into the housing so that 
    the starter rope can rewind properly. 
    Machines without additional manual fuel 
    pump: If the engine is new or after a long 
    out-of-service period or if the tank has 
    been run dry (engine stops), it may be 
    necessary to pull the starter rope several 
    times to prime the fuel system.Starting the Saw
    WARNING
    Bystanders must be well clear of the 
    general work area of the saw.
    Versions with manual fuel pump
    NPress the manual fuel pump bulb at 
    least five times – even if the bulb is 
    already filled with fuel.
    Versions with decompression valve
    NPress in the button to open the 
    decompression valve.
    The decompression valve closes as 
    soon as the engine fires. For this reason 
    you must press in the button before each 
    starting attempt.
    2410BA002 KN
    241BA003 KN
    2410BA020 KN
    2410BA021 KN 
    						
    							MS 241 C-M
    English
    36 All models
    NPush the hand guard (1) forward – 
    the chain is locked.
    NDepress the throttle trigger 
    lockout (2) and throttle trigger (3) 
    and hold them in that position – 
    move Master Control lever (4) to 
    start position (}) and let go of the 
    throttle trigger and throttle trigger 
    lockout at the same time.
    NHold and start your saw as 
    described.
    As soon as the engine runs
    NPress down trigger lockout and the 
    pull the throttle trigger (3) at the 
    same time – the Master Control 
    lever (4) moves to the run 
    position (F) and the engine settles 
    down to idling speed.
    NPull the hand guard back towards 
    the front handle.
    The chain brake is now disengaged – 
    your saw is ready for operation.
    NOTICE
    Always disengage chain brake before 
    accelerating the engine. High revs with 
    the chain brake engaged (chain locked) 
    will quickly damage the clutch and chain 
    brake.
    At very low outside temperatures
    NChange over to winter operation if 
    necessary – see “Winter Operation”.
    Stopping the Engine
    NMove the Master Control lever in the 
    direction of STOP or † – when 
    released, the Master Control lever 
    springs back to the normal run 
    positionF.
    If engine does not start
    NCheck that all settings are correct.
    NCheck that there is fuel in the tank 
    and refuel if necessary.
    NCheck that the spark plug boot is 
    properly connected.
    NRepeat the starting procedure.
    or:
    It is possible that the fuel-air mixture in 
    the combustion chamber is over-rich 
    and has flooded the engine.
    NRemove the spark plug – see 
    "Spark Plug".
    NDry the spark plug.
    3
    2
    1
    4
    0001BA039 KN
    4
    3
    2
    0001BA040 KN
    STOP
    001BA186 KN
    4
    0001BA041 KN
    STOP 
    						
    							MS 241 C-M
    English
    37 NHold the saw on the ground.
    NPush the Master Control lever as far 
    as stop in direction of STOP or † 
    and hold it there.
    WARNING
    An ignition spark may occur if the Master 
    Control lever is not held against STOP 
    or †.
    NOperate the rewind starter several 
    times.
    NRelease the Master Control lever – it 
    springs back to the run positionF.
    NInstall the spark plug – see "Spark 
    Plug".
    NHold and start your saw as 
    described.
    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
    NOTICE
    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 
    brake).
    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".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".
    NOTICE
    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 
    operation
    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.
    NOTICE
    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.
    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.
    Operating Instructions 
    						
    							MS 241 C-M
    English
    38 Long-term storage
    See "Storing the machine"
    Varying cutting lengths, types of wood 
    and work techniques require varying 
    amounts of oil.
    The oil flow can be adjusted as needed 
    using the adjusting screw (1) (on the 
    bottom of the machine).
    Ematic position (E), medium oil flow –
    NTurn adjusting screw to E (Ematic 
    position)
    To increase oil flow –
    Nturn the adjusting screw clockwise
    To reduce oil flow –
    Nturn the adjusting screw 
    counterclockwise
    NOTICE
    The saw chain must always be coated 
    with oil.NTurn 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 
    (3).
    NMeasure the groove depth – with the 
    scale on the filing gauge (special 
    accessory) – in the area used most 
    for cutting.
    Oil Quantity Control
    001BA157 KN
    1
    7DNLQJ&DUHRIWKH*XLGH%DU
    2
    3 1
    143BA026 KN 
    						
    All Stihl manuals Comments (0)

    Related Manuals for Stihl 241 Cm Manual