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Stihl MS 441 C, Instruction Manual, Page: 39 / 52

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Stihl MS 441 C Instruction Manual Download Page 39

MS 441

English

37

N

If the engine is down on power, 

difficult to start or runs poorly at idle 

speed, first check the spark plug.

N

Fit a new spark plug after about 100 

operating hours – or sooner if the 

electrodes are badly eroded. Install 

only suppressed spark plugs of the 

type approved by STIHL – see 

"Specifications".

Removing the spark plug

N

Move the Master Control lever to the 

stop position (0).

N

Use the combination wrench to 

open the fasteners (1) in the 

direction of the arrow.

N

Remove the carburetor box 

cover (2).

N

Pull off the spark plug boot (3).

N

Unscrew the spark plug.

Checking the Spark Plug

N

Clean dirty spark plug.

N

Check electrode gap (A) and 

readjust if necessary – see 

"Specifications".

N

Rectify the problems which have 

caused fouling of the spark plug.

Possible causes are:

–

Too much oil in fuel mix.

–

Dirty air filter.

–

Unfavorable running conditions.

WARNING

Arcing may occur if the adapter nut (1) is 

loose or missing. Working in an easily 

combustible or explosive atmosphere 

may cause a fire or an explosion. This 

can result result in serious injuries or 

damage to property.

N

Use resistor type spark plugs with a 

properly tightened adapter nut.

Installing the spark plug

N

Screw home the spark plug, fit the 

boot and press it down firmly.

N

Fit the carburetor box cover.

Spark Plug

000BA039 KN

A

1

000BA045 KN

219BA033 KN

Summary of Contents for MS 441 C

Page 1: ... STIHL MS 441 Instruction Manual ...

Page 2: ......

Page 3: ...r Nikolas Stihl Guide to Using this Manual 2 Safety Precautions 3 Reactive Forces 8 Working Techniques 9 Cutting Attachment 18 Mounting the Bar and Chain 19 Tensioning the Chain 20 Checking Chain Tension 20 Fuel 20 Fueling 21 Chain Lubricant 25 Filling Chain Oil Tank 25 Checking Chain Lubrication 26 Chain Brake 26 Winter Operation 27 Electric Handle Heating 28 Starting Stopping the Engine 28 Opera...

Page 4: ...machine or its individual components Engineering improvements STIHL s philosophy is to continually improve all of its products For this reason we may modify the design engineering and appearance of our products periodically Therefore some changes modifications and improvements may not be covered in this manual Guide to Using this Manual Fuel tank fuel mixture of gasoline and engine oil Tank for ch...

Page 5: ...lt their physician and the pacemaker manufacturer before operating this power tool Intended use The machine may only be used to saw wood and wooden objects Do not use the machine for any other purpose risk of accidents Do not modify the machine in any way this may increase the risk of personal injury STIHL excludes all liability for personal injury and damage to property caused while using unautho...

Page 6: ...s chain sprockets and accessories They are specifically designed to match your model and meet your performance requirements Refuelling Switch off the engine before refuelling Never refuel the machine while the engine is still hot the fuel may spill over risk of fire Open the fuel filler cap carefully so that any excess pressure is relieved gradually and fuel does not splash out The machine may onl...

Page 7: ...start the engine start as described in the Instruction Manual During operation Ensure you always have a firm and safe footing Take special care when the bark is wet danger of slipping Always hold the chain saw firmly with both hands Right hand on the rear handle even if you are left handed To ensure reliable control wrap your thumbs tightly around the handlebar and handle In the event of impending...

Page 8: ...red by a STIHL servicing dealer if the saw chain still continues to move during idling Ensure proper ventilation when working in trenches hollows or other confined locations risk of fatal injury from breathing toxic fumes If you feel sick have a headache vision problems e g your field of vision gets smaller hearing problems dizziness or inability to concentrate stop work immediately Such symptoms ...

Page 9: ...he fuel Check fuel cap regularly for tightness Use only spark plugs that are in perfect condition and have been approved by STIHL see Specifications Check ignition lead insulation in good condition secure connection Check that the muffler is in perfect working condition Do not use the machine if the muffler is damaged or missing risk of fire damage to hearing Never touch a hot muffler risk of burn...

Page 10: ... firmly with both hands and maintain a secure grip Always cut at full throttle Be aware of the location of the guide bar nose Do not cut with the guide bar nose Be especially careful with small tough limbs undergrowth and offshoots the saw chain may become caught in them Never cut several limbs at once Do not lean too far forward Do not cut above shoulder height Use extreme caution when re enterin...

Page 11: ...o recognise the danger Use aids such as winches or draglines When felling close to roads rail lines power lines etc work with particular care If necessary notify police power companies or railway authorities Sawing and felling work including all related work plunge cutting limbing etc may only be carried out by persons who have been specially trained and instructed Persons who are not experienced ...

Page 12: ...ormation on a possible fire risk If on a slope stand on the uphill side of the log Watch out for rolling logs When working at heights Always use a lift bucket Never work on a ladder or in a tree Never work on an insecure support Do not work above shoulder height Never operate your power tool with one hand Begin cutting with the saw at full throttle and engage the spiked bumper firmly in the wood a...

Page 13: ...eck that there are no other persons in the felling area other than helpers Make sure no one is endangered by the falling tree the noise of your engine may drown any warning calls Maintain a distance of at least 2 1 2 tree lengths from the next felling site Determine direction of fall and escape path Select gap in stand into which you want the tree to fall Pay special attention to the following poi...

Page 14: ...watch out for falling limbs and watch the top of the tree Preparing work area at base of tree First clear the tree base and work area from interfering limbs and brush to provide a secure footing Clean lower portion of tree base e g with an axe sand stones and other foreign objects will dull the saw chain Make the vertical cut first then the horizontal but only if the wood is sound Felling Notch Pr...

Page 15: ... the planned direction of fall if necessary correct direction of fall by re cutting the felling notch Sapwood cuts Sapwood cuts in long fibered softwood help prevent sapwood splintering when the tree falls Make cuts at both sides of the trunk at same height as bottom of felling notch to a depth of about 1 10 of trunk diameter On large diameter trees cut to no more than width of guide bar Do not ma...

Page 16: ...ge cut the sight helps keep the hinge horizontal i e the same thickness all round To do this hold the plunge cutting sight parallel to the chord of the felling notch Felling wedges Make use of wedges as soon as possible i e providing they do not interfere with cutting Drive wedge into felling cut with a suitable tool Use only aluminum or plastic wedges never steel Steel wedges can seriously damage...

Page 17: ...ally at the same level as the felling cut B Large diameter trees Perform this felling cut when the tree diameter is greater than the length of the guide bar Shout a warning before starting the felling cut N Engage the spiked bumper at the required height of the felling cut and use it as a pivot avoid repositioning the saw more than necessary N The guide bar nose enters the wood 1 before it reaches...

Page 18: ...g cut Felling Cut with Holding Strap Leaner A Small diameter trees Perform this felling cut when the tree diameter is smaller than the length of the guide bar N Plunge the guide bar into the trunk until it emerges at the other side N Enlarge the felling cut E in direction of hinge 1 Cut horizontally Do not cut into the hinge N Enlarge the felling cut in direction of holding strap 2 Cut horizontall...

Page 19: ...ap 3 Do not cut into the holding 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 N Engage the spiked bumper behind the hinge and use it as a pivot avoid repositioning the saw more than necessary N The guide bar nose enters the wood 4 before it reaches the holding strap hold the saw horizontally and swing it as far as pos...

Page 20: ...dard with a chain scabbard that matches the cutting attachment If guide bars of different lengths are mounted to the saw always use a chain scabbard of the correct length which covers the complete guide bar The length of the matching guide bars is marked on the side of the chain scabbard Guide bars longer than 90 cm require one scabbard extension Guide bars longer than 120 cm require two scabbard ...

Page 21: ...harp cutters N Fit the chain start at the bar nose N Fit the guide bar over the studs 1 the cutting edges on the top of the bar must point to the right N Engage the peg of the tensioner slide in the locating hole 2 place the chain over sprocket 3 at the same time N Turn the tensioning screw 4 clockwise until there is very little chain sag on the underside of the bar and the drive link tangs are en...

Page 22: ... has been in use for some time N Check chain tension frequently see chapter on Operating Instructions Your engine requires a mixture of gasoline and engine oil WARNING For health reasons avoid direct skin contact with gasoline and avoid inhaling gasoline vapor STIHL MotoMix STIHL recommends the use of STIHL MotoMix This ready to use fuel mix contains no benzol or lead has a high octane rating and ...

Page 23: ... safe location protected from light and the sun Fuel mix ages only mix sufficient fuel for a few weeks work Do not store fuel mix for longer than 30 days Exposure to light the sun low or high temperatures can quickly make the fuel mix unusable STIHL MotoMix may be stored for up to 2 years without any problems N Thoroughly shake the mixture in the canister before fueling your machine WARNING Pressu...

Page 24: ... with fuel Closing Grip must be vertical N Fit the cap positioning marks on tank cap and filler neck must be in alignment N Press the cap down as far as stop N While holding the cap depressed turn it clockwise until it engages in position N Fold the grip flush with the top of the cap Checking security of cap The lug on the grip must fully engage the recess arrow Left Tank cap without symbols Right...

Page 25: ...d lock the cap clockwise see sections on Closing and Checking security of cap Tank cap with markings and symbols Opening N Raise the grip until it is upright N Turn the cap counterclockwise about a quarter turn Marks on tank cap and fuel tank must line up N Remove the cap Filling up with fuel Take care not to spill fuel while fueling and do not overfill the tank STIHL recommends you use the STIHL ...

Page 26: ...isted in relation to top N Remove the cap from the fuel tank and check it from above N Place the cap on the opening and rotate it counterclockwise until it engages the filler neck N Continue rotating the cap counterclockwise about a quarter turn this causes the bottom of the cap to be turned to the correct position N Turn the cap clockwise and lock it in position see section on Closing 001BA234 KN...

Page 27: ... the oil filler cap and the area around it to ensure that no dirt falls into the oil tank N Always position the machine so that the filler cap is facing upwards N Open the filler cap Filling the chain oil tank Standard oil pump N Fill the chain oil tank each time the fuel tank has been filled Oil pump with increased delivery rate available option It is necessary to check and refill the oil tank fr...

Page 28: ...the hand guard toward the bar nose with your left hand or by inertia in certain kickback situations The chain is stopped and locked Releasing the chain brake N Pull the hand guard back toward the front handle NOTICE Always disengage chain brake before accelerating the engine except when checking its operation and before starting cutting work High revs with the chain brake engaged chain locked will...

Page 29: ...Now the carburetor is pre heated by the preheater plate this helps prevent carburetor icing N At temperatures above 20 C always return the slide to the summer position NOTICE otherwise risk of engine malfunction due to overheating If engine trouble occurs first return the slide from winter to summer position Air filter system N Retrofit new air filter if necessary see Air filter system At temperat...

Page 30: ...long periods of operation The heating system is maintenance free Positions of the master control lever Stop 0 engine off ignition is switched off Run F Engine running or can start Warm start n this position is for starting the warm engine the master control lever returns to run when the throttle trigger is squeezed Cold start l this position is for starting the cold engine Adjusting the master con...

Page 31: ...e was flooded Holding the chain saw There are two ways to hold the chain saw during starting On the ground N Place the chain saw securely on the ground assume a steady stance the saw chain must not touch any objects and also must not touch the ground N With the left hand on handlebar press the chain saw firmly against the ground thumb wrapped around the handlebar N Place your right foot into the r...

Page 32: ...the fuel line Starting the chain saw WARNING There must not be anyone within the swivel range of the chain saw N Press the button the decompression valve will be opened The decompression valve is closed automatically when the engine fires for the first time For this reason press the button again before each additional starting attempt N Push the hand guard 1 forwards the saw chain is blocked N Sim...

Page 33: ... very low temperatures N Let the engine warm up briefly with the throttle slightly open N if necessary configure for winter operation see Winter Operation Switching off the engine N Move the master control lever to the stop position 0 If the engine does not start The master control lever was not returned from the position cold start l to warm start n in time the engine may be flooded N Move the ma...

Page 34: ...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 da...

Page 35: ...e can be identified by the groove 2 in the adjusting screw With this oil pump in setting range a the oil tank can run empty before the fuel tank thus causing the saw chain to run dry N in setting range a fill the fuel tank only half full or refill the oil tank when the fuel tank is approximately half empty N Flip the bar after each sharpening and each time the chain is changed to avoid uneven wear...

Page 36: ...filter fabric Universal filter for almost all conditions of use from very dusty to wintry conditions etc N Wire 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 N Always use STIHL filters dry Fouled air filters will i...

Page 37: ...ose to extreme heat N Do not oil the filter N Reinstall filter General Information The carburetor comes from the factory with a standard setting This setting provides an optimum fuel air mixture under most operating conditions With this carburetor it is only possible to correct the adjusting screws within fine limits Standard Setting N Shut off the engine N Check the air filter and clean or replac...

Page 38: ...y correction to the low speed screw L Fine tuning for operation at high altitude A slight correction of the setting may be necessary if engine does not run satisfactorily N Carry out the standard setting N Warm up the engine N Turn high speed screw H slightly clockwise leaner no further than stop NOTICE After returning from high altitude reset the carburetor to the standard setting If the setting ...

Page 39: ...e spark plug Checking the Spark Plug N Clean dirty spark plug N Check electrode gap A and readjust if necessary see Specifications N Rectify the problems which have caused fouling of the spark plug Possible causes are Too much oil in fuel mix Dirty air filter Unfavorable running conditions WARNING Arcing may occur if the adapter nut 1 is loose or missing Working in an easily combustible or explosi...

Page 40: ...ocket after use of two saw chains or earlier if the wear marks arrows are deeper than 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 STIHL recommends use of original STIHL chain sprockets in order to ensure optimal functioning of the chain brake N Use a screwdriver to remo...

Page 41: ...chain components and adapt these parts to the remaining parts in terms of shape and level of wear rework accordingly Carbide tipped Duro saw chains are especially wear resistant For an optimal sharpening result STIHL recommends STIHL servicing dealers WARNING Compliance with the angles and dimensions listed below is absolutely necessary An improperly sharpened saw chain especially depth gauges tha...

Page 42: ...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 N Select sharpening tools in accordance with chain pitch N Clamp guide bar if necessary N Block saw chain push the hand guard forward N To advance the saw chain pull the ...

Page 43: ...stance can be increased by up to 0 2 mm 0 008 Lowering the depth gauges The depth gauge setting is lowered when the cutter is sharpened N Check the depth gauge setting after each sharpening N Lay the appropriate file gauge 1 for the chain pitch on the saw chain and press it against the cutter to be checked if the depth gauge protrudes past the file gauge the depth gauge must be reworked Saw chains...

Page 44: ...auge Taper square file Sharpening set1 Inches mm mm Inches Part number Part number Part number Part number Part number 1 4P 6 35 3 2 1 8 5605 771 3206 5605 750 4300 0000 893 4005 0814 252 3356 5605 007 1000 1 4 6 35 4 0 5 32 5605 772 4006 5605 750 4327 1110 893 4000 0814 252 3356 5605 007 1027 3 8 P 9 32 4 0 5 32 5605 772 4006 5605 750 4327 1110 893 4000 0814 252 3356 5605 007 1027 0 325 8 25 4 8 ...

Page 45: ...f damaged as required Complete machine Visual inspection condition leaks X X Clean X Throttle trigger trigger lockout choke lever stop switch Master Control lever depending on version Check operation X X Chain brake Check operation X X Have checked by servicing dealer1 X Manual fuel pump if fitted Check X Have repaired by servicing dealer1 X Pickup body filter in fuel tank Check X Clean replace fi...

Page 46: ...operation then every 150 hours of operation X Safety labels Replace X 1 STIHL recommends a STIHL servicing dealer 2 Firmly tighten down the cylinder base screws of professional saws 3 4 kW or more after 10 to 20 hours of operation The following maintenance intervals apply to normal usage and operating conditions If your daily working time is longer or operating conditions are difficult very dusty ...

Page 47: ...r STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer STIHL dealers are regularly given the opportunity to attend training courses and are supplied with the necessary technical information If these maintenance operations are not carried out as specified the user assumes responsibility for any damage that may occur Among other par...

Page 48: ...t 9 Chain sprocket cover 10 Chain catcher 11 Chain tensioner 12 Bumper spike 13 Guide bar 14 Oilomatic saw chain 15 Oil filler cap 16 Muffler 17 Front hand guard 18 Front handle handlebar 19 Starter grip 20 Fuel tank twist lock 21 Master Control lever 22 Throttle trigger 23 Throttle trigger interlock 24 Rear handle 25 Rear hand guard Serial number Main Parts 18 14 6 5 2 3 11 10 4 8 13 1 7 9 12 21 ...

Page 49: ...cal substances For information on compliance with the REACH regulation EC No 1907 2006 see www stihl com reach Exhaust Emissions The CO2value measured in the EU type approval procedure is specified at www stihl com co2 The measured CO2value was determined on a representative engine in accordance with a standardized test procedure under laboratory conditions and does not represent either an explici...

Page 50: ...rs must be carried out by a servicing dealer STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer STIHL dealers are regularly given the opportunity to attend training courses and are supplied with the necessary technical information When repairing the machine only use replacement parts which have been approved by STIHL for this po...

Page 51: ...1 EN 55012 EN 61000 6 1 The measured and guaranteed equivalent sound power level has been determined in accordance with Directive 2000 14 EC Annex V and standard ISO 9207 Measured sound power level Guaranteed sound power level The EC type approval test was carried out at the DPLF Deutsche Prüf und Zertifizierungsstelle für Land und Forsttechnik NB 0363 Spremberger Straße 1 D 64823 Groß Umstadt The...

Page 52: ...www stihl com 04582190121A 0458 219 0121 A 0458 219 0121 A englisch G ...

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