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Instruction Manual
STIH)
STIHL MS 381
BA_MS381_01_U_M6.book Seite 0 Montag, 6. November 2006 10:15 10
1
EnglishBA
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Guide tSafety WorkinMountinTensionCheckiFuel ..FuelingChain LFilling CCheckiChain BInformaStartingOperatiOil QuaTaking CleaninAdjustinCheckin
lity
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MS 381
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STIHl
tion Before You Start .......... 24 / Stopping the Engine ........ 24ng Instructions .................... 28ntity Control ........................ 29Care of Guide Bar ............... 29g the Air Filter ..................... 30g the Carburetor ................ 31g the Spark Plug ................ 32
Main Parts and Controls ................. 46Specifications ................................. 47Special Accessories ....................... 47Ordering Spare Parts ..................... 48Maintenance and Repairs .............. 48Manufacturer's declaration of conformity ................................... 49Quality Certification ........................ 49
queries concerning your mach
Hans Peter Stihl
ents
o Using this Manual .............. 2Precautions and g Techniques ......................... 3g the Bar and Chain ........... 17ing the Saw Chain .............. 18
ng Chain Tension ................. 18.............................................. 19 ............................................ 20ubricant .............................. 21hain Oil Tank ...................... 22
ng Chain Lubrication ........... 22rake .................................... 23
Spark Arresting Screen in Muffler ........................................ 33Replacing Starter Rope and Rewind Spring ......................... 34Storing the Machine ....................... 36Checking and Replacing Chain Sprocket ............................... 36Maintaining and SharpeningSaw Chain ...................................... 39Maintenance Chart ......................... 43Minimize Wear and Avoid Damage ................................ 45
Dear Customer,
Thank you for choosing a quaengineered STIHL product.
This machine has been built umodern production techniquescomprehensive quality assuraEvery effort has been made to eyour satisfaction and troublefrof the machine.
Please contact your dealer or osales company if you have any
2
English
S 381
PictogAll the machinthis ma
The opare sup
SymbThe inddescribin differ
: A bwitillu
A descrrefers dcontainillustratExamp
LoosenLever (
refer to t re not elated an ts may
ssories
lly esult, ements
er from lease
cations overed
Guid
M
ramspictograms attached to the e are shown and explained in nual.
erating and handling instructions ported by illustrations.
ols in textividual steps or procedures ed in the manual may be marked ent ways:
ullet marks a step or procedure hout direct reference to an stration.
iption of a step or procedure that irectly to an illustration may item numbers that appear in the ion.le:
the screw (1) 2) ...
In addition to the operating instructions, this manual may contain paragraphs that require your special attention. Such paragraphs are marked with the symbols described below:
Warning where there is a risk of an accident or personal injury or serious damage to property.
Caution where there is a risk of damaging the machine or its individual components.
Note or hint which is not essential for using the machine, but may improve the operator’s under-standing of the situation and result in better use of the machine.
Note or hint on correct procedure in order to avoid damage to the environment.
Equipment and featuresThis instruction manual may several models with differenfeatures. Components that ainstalled on all models and rapplications are marked withasterisk (*). Such componenbe available as special accefrom your STIHL dealer.
Engineering improvementsSTIHL’s philosophy is to continuaimprove all of its products. As a rengineering changes and improvare made from time to time. If theoperating characteristics or the appearance of your machine diffthose described in this manual, pcontact your STIHL dealer for assistance.
Therefore some changes, modifiand improvements may not be cin this manual.
e to Using this Manual
3MS 381
English
observegeneraaxe or
referenprecaueven fa
Alwaysstandar
If you hmodel bHave yto operspecialoperati
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emely
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TIHL , chain
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SafetWork
Because a chainsaw is a high-speed wood-cutting tool with sharp cutters, some special safety precautions must be
d in addition to those that lly apply when working with an hand saw.
It is important that you read and understand the instruction manual before using your chainsaw for the first time and keep it in a safe place for future
ce. Non-observance of the safety tions may result in serious or tal injury.
observe local safety regulations, ds and ordinances.
ave never used this chainsaw efore:
our STIHL dealer show you how ate your chainsaw or attend a course of training in chainsaw on.
should never be allowed to use a w. Children, bystanders and should not be allowed in the ere a chainsaw is in use.
When the machine is not in use (work break), shut it off so that it does not endanger others and secure it against unauthorized use.
The chainsaw user is responsible for accidents or risks involving third parties or their property.
Do not lend or rent your chainsaw without the instruction manual. Be sure that anyone using your saw understands the information contained in this manual.
You must be rested, healthy and in good physical condition to operate a power tool.
Persons with pacemakers only:The ignition system of your unit produces an electromagnetic field of a very low intensity. This field may interfere with some pacemakers. To reduce the risk of serious or fatal injury, persons with pacemaker should consult their physician and the pacemaker manufacturer before operating this tool.
Do not operate this power tool while under the influence of any substance (drugs, alcohol) which might impair vision, dexterity or judgment.
To reduce the risk of accidentsinjury, put off the work in poor wconditions (rain, snow, ice, wind)
Use your saw for cutting wood owooden objects only.
Do not use your chainsaw for anpurpose since this may result in accidents or damage to the macNever attempt to modify your chain any way since this can be extrdangerous and may also result inaccidents or damage to the mac
Only use tools, guide bars, chainssprockets and accessories that aexplicitly approved for this chainsmodel by STIHL or are technicalidentical. If you have any questiothis respect, consult a specialist Use only high quality replacemensince there is otherwise a risk ofaccidents or damage to the mac
STIHL recommends the use of Soriginal tools, guide bars, chainssprockets and accessories. The characteristics of these componespecifically designed to match yochainsaw model and meet your performance requirements.
y Precautions and ing Techniques
4
English
S 381
ClothiWear pequipm
Do not scarvesrestrict with theconfinecap, ha
face shear plu
ble naked not
not
.
still hot h fire.
ow any elease
tilated l, wipe
s on ly.
M
ng and Equipmentroper protective clothing and ent.
Clothing must be sturdy but allow complete freedom of movement. Wear snug-fitting clothing with cut retardant inserts – a safety combination, not a coat.
wear loose-fitting garments, , jewelery or anything that could movement or become entangled saw, wood or brush. Tie up and long hair (e.g. with a hair net, rd hat, etc.).
Wear steel-toed safety boots with non-slip soles.
Wear a safety hard hat where there is a danger of head injuries from falling objects.
Wear safety glasses or a ield and hearing protection, e.g.
gs or ear muffs.
Wear heavy-duty gloves, preferably made of leather.
STIHL offers a comprehensive range of safety clothing and equipment.
Transporting the ChainsawAlways engage the chain brake and fit the chain guard (scabbard) before carrying the saw short distances. Also stop the engine before carrying the saw longer distances (more than about 50 m).
Always carry the saw by the front handle (handlebar) – with the hot muffler away from your body – the guide bar must point to the rear. To avoid serious burn injuries, avoid touching hot parts of the machine, especially the surface of the muffler.
Transporting by vehicle: When transporting in a vehicle, properly secure your saw to prevent turnover, fuel spillage and damage.
Fueling Gasoline is an extremely flammafuel. Keep clear offlames and fire. Dospill any fuel – do smoke.
Stop the engine before refueling
Do not refuel while the engine is since fuel may overflow and catc
Open the fuel cap carefully to allpressure build-up in the tank to rslowly.
Fuel your chainsaw in a well-venarea, outdoors only. If you spill fuethe saw immediately – if fuel getyour clothing, change immediate
5MS 381
English
Differendifferen
This recausingoff and
from
aw. Do unning r saw
nd th the
ual.
en the
t models may be equipped with t fuel caps.
After fueling, tighten down the screw-type fuel cap as securely as possible.
Insert the fuel cap with hinged grip (bayonet type cap) correctly in the opening, turn it clockwise as far as stop and fold the grip down.
duces the risk of unit vibrations the fuel cap to loosen or come
spill quantities of fuel.
Before StartingCheck that saw is properly assembled and in good condition – refer to appropriate chapters in the instruction manual:
– Check operation of chain brake, front hand guard
– Correctly mounted guide bar– Correctly tensioned chain– Smooth action of throttle trigger and
throttle trigger interlock – throttle trigger must return automatically to idle position
– Master control/stop switch must move easily to STOP or 0
– Check that spark plug boot is secure – a loose boot may cause arcing that could ignite combustible fumes and cause a fire
– Never attempt to modify the controls or safety devices
– Keep the handles dry and clean – free from oil and pitch – for safe control.
To reduce risk of personal injury, do not operate your saw if it is damaged or not properly assembled.
Starting the EngineStart the engine at least 3 metersthe fueling spot, outdoors only.
Your chainsaw is a one-person snot allow other persons near the rchainsaw. Start and operate youwithout assistance.
To reduce risk of chain rotation apersonal injury, lock the chain wichain brake before starting.
Do not drop start the chainsaw.The correct starting procedure isdescribed in your instruction man
Do not attempt to start the saw whsaw chain is in a cut.
6
English
S 381
DuringIn the ean emeimmediControl
Never aunatten
When tNote thfor a shthrottle
Take sp– dampground
Avoid sor in dit
Ensurefooting.
Do not distancneeded
Be partwearingyour abalarms,
To redubreak inexhaus
. may
rk area at
oke your fuel system.
as not fall), ndition see
nd
e ed. In d by
tate ssary, chain d by
M
Operationvent of impending danger or in rgency, switch off the engine ately by moving the Master / stop switch to $ or d.
llow the chainsaw to run ded.
he engine is running:at the chain continues to rotate ort period after you let go of the
trigger – flywheel effect.
ecial care in slippery conditions , snow, ice, on slopes, uneven and freshly debarked logs.
tumbling on stumps, roots, rocks ches.
you always have a firm and safe
work alone – keep within calling e of others in case help is .
icularly alert and cautious when hearing protection because ility to hear warnings (shouts, etc.) is restricted.
ce the risk of accidents, take a good time to avoid tiredness or
tion.
To reduce risk of fire, keep hot exhaust gases and hot muffler away from easily combustible materials (e.g. wood chips, bark, dry grass, fuel).Mufflers with a catalytic converter can become particularly hot.
Your chainsaw produces toxic exhaust fumes as soon as the engine is running. These fumes may be colorless and odorless and contain
unburnt hydrocarbons and benzol. Never run the engine indoors or in poorly ventilated locations, even if your model is equipped with a catalytic converter.
To reduce the risk of serious or fatal injury from breathing toxic fumes, ensure proper ventilation when working in trenches, hollows or other confined locations.
To reduce the risk of accidents, stop work immediately in the event of nausea, headache, visual disturbances (e.g. reduced field of vision), problems with hearing, dizziness, deterioration in ability to concentrate. Apart from other possibilities, these symptoms may be caused by an excessively high concentration of exhaust gases in the work area.
The mists, vapors and dusts (e.gsawdust) produced during cuttingbe dangerous to health. If the wois very dusty, wear a respirator thoffers suitable protection.
To reduce risk of fire, do not smwhile operating or standing nearchainsaw. Note that combustiblevapor may escape from the fuel
If your chainsaw is subjected to unusually high loads for which it wdesigned (e.g. heavy impact or aalways check that it is in good cobefore continuing cutting work – also “Before Starting”.
Check the fuel system for leaks amake sure the safety devices areworking properly. Do not continuoperating your saw if it is damagcase of doubt, have saw checkeyour servicing dealer.
Make sure the chain does not rowhile the engine is idling. If neceadjust idle speed properly. If the still rotates, have the saw checkeyour servicing dealer.
7MS 381
English
ReactThe mooccur dpushba
Dange
Kickbacsuddenuncontr
:
h both grip.
e guide
., tough ain.nce.
ight.e-
f you tting
or the cut .
ed ting
d a
ive Forcesst common reactive forces that uring cutting are: kickback, ck and pull-in.
rs of kickback
Kickback can result in serious or fatal injury.
k occurs when the saw is ly thrown up and back in an olled arc towards the operator.
Kickback occurs, e.g.
– when the upper quadrant of the bar nose unintentionally contacts wood or another solid object, e.g. when another limb is touched accidentally during limbing
– when the chain at the nose of the guide bar is pinched in the cut.
Quickstop chain brake:
This device reduces the risk of injury in certain situations - it cannot prevent kickback. If activated, the brake stops the saw chain within a fraction of a second – for a description of this device refer to chapter on "Chain brake" in this manual.
To reduce the risk of kickback
– Work cautiously and avoid situations which could causekickback.
– Hold the chainsaw firmly withands and maintain a secure
– Always cut at full throttle.– Be aware of the location of th
bar nose at all times.– Do not cut with the bar nose– Take special care with small
limbs, they may catch the ch– Never cut several limbs at o– Do not overreach.– Never cut above shoulder he– Use extreme caution when r
entering a previous cut.– Do not attempt plunge cuts i
are not experience in this cutechnique
– Be alert for shifting of the logother forces that may cause to close and pinch the chain
– Always cut with a correctly sharpened, properly tensionchain – the depth gauge setmust not be too large.
– Use a low kickback chain annarrow radius guide bar.
001B
A03
6 K
N
001B
A09
3 LÄ
8
English
S 381
A = Pu
Pull-in bottomcaught the woothe sawAlwayssecure
rees
reas. such ckle,
s.
ed risk ing the ted, if
a cable
oads, extra
the
M
ll-in
occurs when the chain on the of the bar is suddenly pinched, or encounters a foreign object in d. The reaction of the chain pulls forward. hold the spiked bumper ly against the tree or limb.
B = Pushback
Pushback occurs when the chain on the top of the bar is suddenly pinched, caught or encounters a foreign object in the wood. The reaction of the chain drives the saw straight back toward the operator.
To avoid pushback:
– Be alert to situations that may cause the top of the guide bar to be pinched.
– Do not twist the guide bar in the cut.
Exercise extreme caution:
– with leaners– with trees that have fallen
unfavorably between other tand are under strain
– when working in blowdown aDo not work with the chainsaw incircumstances. Use block and tacable winch or tractor.
Pull out exposed and cleared logSelect clear area for cutting.
Deadwood (dry, decayed or rottwood) represents a considerablethat is difficult to assess. Identifyextent of the dangers is complicanot impossible. Use aids such as winch or tractor in such cases.
When felling in the vicinity of rrailways, power lines, etc., takeprecautions. If necessary, informpolice, utility company or railwayauthority
001B
A03
7 K
N
A 001B
A03
8 K
N
B
9MS 381
English
Holdin
Alwayshands even if safe coaroundhandle.
CuttinDo not startingspeed cthrottle
Work cconditiogood –others
Use thechain, gmust m
side of .
ecure
heightone
001B
A03
3 K
N
g and Controlling the Saw
hold your saw firmly with both – right hand on the rear handle, you are left-handed. To ensure ntrol, wrap your fingers tightly the front handle and control
goperate your chainsaw with the throttle lock engaged. Engine annot be controlled with the
trigger in this position.
almly and carefully – in daylight ns and only when visibility is
ensure you do not endanger – stay alert at all times.
shortest possible guide bar: The uide bar and chain sprocket atch each other and your saw.
Position the saw so that your body is clear of the cutting attachment.
Always pull the saw out of the cut with the chain running.
Use your chainsaw for cutting only. It is not designed for prying or shoveling away limbs, roots or other objects.
Do not underbuck freely hanging limbs.
To reduce the risk of injury, take special care when cutting shattered wood – sharp slivers of wood may be caught and flung in your direction.
Make sure your saw does not touch any foreign materials: Stones, nails, etc. may be flung off, damage the saw chain or cause the saw to kick back unexpectedly.
If on a slope, stand on the uphill the log. Watch out for rolling logs
When working at heights:
– Always use a lift bucket – Never work on a ladder– Never work in a tree– Never work on any other ins
support– Do not work above shoulder– Never operate the saw with
hand
001B
A08
7 LÄ
001B
A08
2 K
N
10
English
S 381
Begin cand enthe woo
Never wbecausand offspikedtree or
Note wthe sawkerf. Yothe sawof contr
u want
ing
ucture,
d – do
ecial n case r rotted
M
utting with the saw at full throttle gage the spiked bumper firmly in d, and then continue cutting.
ork without the spiked bumper e the saw may pull you forwards balance. Always hold the bumper securely against the limb.
hen reaching the end of a cut that is no longer supported in the u have to take the full weight of since it might otherwise go out ol.
Felling and LimbingTo reduce the risk of accidents and injury, do not attempt felling or limbing unless you have been trained in the necessary techniques.
Observe all country-specific regulations on felling techniques.
Check that there are no other persons in the felling area – other than helpers.
Make sure no-one is endangered by falling tree – the noise of your engine may drown any warning calls.
Maintain a distance of at least 21/2 tree lengths from next felling site.
Determine direction of fall andescape paths
Select gap in stand into which yothe tree to fall.
Pay special attention to the followpoints:
– The natural lean of the tree– Any unusually heavy limb str
damage– The wind direction and spee
not fell in high winds– Sloping ground– Neighboring trees– Snow load– Soundness of tree – take sp
care if trunk is damaged or iof deadwood (dry, decayed owood)
001B
A08
8 LÄ
2 /1 2
1 1/1 2
11MS 381
English
A = DirB = Es
– Esevedire
– Repat
– Pladison
– Alwtrepre
ake hroud d
ning tion
ods for e lling
001B
A15
3 K
N
ection of fallcape paths
tablish paths of escape for ryone concerned – opposite to ction of fall at about 45°.
move all obstacles from escape hs.ce all tools and equipment a safe tance away from the tree, but not the escape paths.ays keep to the side of the falling
e and only walk away along the planned escape path.
– 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.
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 with an axe. Sand, stones and other foreign objects will dull the saw chain.
– Remove large buttress roots: Make vertical cut first, then horizontal – but only if wood is sound.
Felling notch
When making the felling notch, muse of the gunning sight on the sand housing to check the plannedirection of fall.
Position your saw so that the gunsight points in exactly in the direcyou want the tree to fall.
There are several approved methmaking the felling notch – observcountry-specific regulations on fetechniques.
STIHL recommends the followingmethod:
B
001B
A04
0 K
N
A45°
45°
B
001B
A14
6 K
N
12
English
S 381
Thdire
: Madiresig
: Ma: Ch
if nImporta
– Fepla
– As– Cu
the
he
tly notch.
ameter felling
001B
A14
4 K
N
D
M
e felling notch (C) determines the ction of fall.
ke the horizontal cut – check the ction of fall with the gunning
ht.ke angle cut at about 45°.eck the felling notch and correct it ecessary.nt:
lling notch at a right angle to the nned direction of fall. close to ground as possible.t to a depth of about 1/5 to 1/3 of trunk diameter.
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 make sapwood cuts if wood is diseased.
Felling
Shout a warning before starting tfelling cut.
– Make the felling cut (D) slighhigher than bottom of felling
– Cut horizontally.– Leave approx. 1/10 of tree di
uncut between felling cut andnotch. This is the hinge.
001B
A14
3 K
N
C
C
001B
A15
0 K
N
D
13MS 381
English
– Drigooalusteand
– Thfall
– Docoufall
er than he
t – than
ood aw
s
001B
A14
8 K
N
ve wedges into the felling cut in d time. Use only wooden,
minum or plastic wedges. Never el, which can damage the chain cause kickback.
e hinge (E) helps control the ing tree. not cut through the hinge – you ld lose control of the direction of
– this could result in an accident.
– Leave a broader hinge on rotten trees.
Shout a second warning immediately before the tree falls.
Small diameter trees:simple fan cut
Apply the spiked bumper behind the hinge – pivot the saw around this point - only as far as the hinge. The spiked bumper rolls against the trunk.
Large diameter trees: sectioning method
If the diameter of the tree is greatthe length of the guide bar, use tsectioning method.
Use the spiked bumper as a pivoavoid repositioning the saw morenecessary.
First cut (1):Nose of guide bar should enter wjust behind the hinge – hold the shorizontally and swing it as far apossible.
001B
A14
5 K
N
E
E
001B
A14
7 K
N
1
14
English
S 381
When rkeep thkerf to apply th
Insert a
Last cuApply tsimple hinge!
des as
twice
d eter
ll (oak, d ned
lieve ent nge
t in the here is is the
M
epositioning for the next cut (2), e guide bar fully engaged in the keep the felling cut straight – e spiked bumper again.
wedge (3) in the cut.
t (4): he spiked bumper as for the fan cut – do not cut through the
Plunge cutting
Do not attempt plunge cuts if you are not experience in this cutting technique.
– Use a low kickback chain and exercise particular caution
– For heartwood cut– For felling leaners– For relieving cuts during bucking– For DIY projects
Begin cut (1) by applying lower portion of the guide bar nose – do not use upper portion because of risk of kickback. Cut until depth of kerf is twice the width of the guide bar.
Swing saw slowly (2) into plunge-cutting position. Take care because of the risk of kickback or pushback.
Make the plunge cut (3) very carefully. Danger of pushback.
Heartwood cut
Enlarge the plunge cut to both sishown
– if tree diameter is more thanthe length of the guide bar.
– if a large portion of heartwooremains uncut on large diamtrees.
– on trees that are difficult to febeech), to prevent heartwoosplintering and maintain plandirection of fall.
– on soft deciduous trees to retension in lying log and prevslivers in the center of the hibeing torn out of the log.
–
: Carefully make the plunge cucenter of the felling notch – ta danger of pushback at thpoint – then swing the bar indirection of the arrow.
4
2
12
3
001B
A179
KN
15MS 381
English
Limbin
– Us– Wo
wh– Do– Wa
ten– Ne
at o
When c
– Ussaw
– Nefoo
– Nethe
sult in lems in
be ause it
by:
rm
by:
ffer oms: g).
inders
ld heir bove
advice.
g
e a low kickback chain.rk with the saw supported erever possible. not work with the bar nose.tch for limbs which are under sion. ver attempt to cut several limbs nce.
utting small logs
e a sturdy and stable support – horse.
ver hold the log with your leg or t.ver allow another person to hold log or help in any other way.
Lying or standing logs under tension: Risk of pinching!
Always start relieving cut at the compression side (1).
Make relieving cut and then perform bucking cut at the tension side (2) – the saw will otherwise pinch or kick back.
If not otherwise possible, make the bucking cut from the bottom upwards (underbuck) – be wary of pushback.
Do not cut a lying log at a point where it is touching the ground because the saw chain will otherwise be damaged.
VibrationsProlonged use of the unit may revibration-induced circulation probthe hands (whitefinger disease).
No general recommendation cangiven for the length of usage becdepends on several factors.
The period of usage is prolonged
– Hand protection (wearing wagloves)
– breaks
The period of usage is shortened
– Any personal tendency to sufrom poor circulation (symptfrequently cold fingers, itchin
– Low outside temperatures.– Gripping force (a tight grip h
circulation).Continual and regular users shoumonitor closely the condition of thands and fingers. If any of the asymptoms appear, seek medical
1
001B
A15
1 K
N2
1
001B
A15
2 K
N
2
16
English
S 381
MainteServiceattempnot desHave aspecial
STIHL servicinexclusiservicinregulartraininginformachange
Use onsince thaccidenyou havconsult
STIHL originalcharactspecificchainsaperform
To reduunintenrotationand disbefore maintenExceptadjustm
n.n.
ns aw
at all ned,
ar and
roperly ly. Take oid void
p using brake
er. Do oblem n
M
nance and Repairs the machine regularly. Do not t any maintenance or repair work cribed in the instruction manual. ll other work performed by a ist dealer.
recommends that you have g and repair work carried out
vely by an authorized STIHL g dealer. STIHL dealers are ly given the opportunity to attend courses and receive technical tion bulletins on engineering s.
ly high quality replacement parts ere is otherwise a risk of ts or damage to the machine. If e any questions in this respect,
a specialist dealer.
recommends you use only STlHL replacement parts. The eristics of these parts are ally designed to match your w model and meet your ance requirements.
ce the risk of injury from tional engine startup and chain , always shut off the engine connect the spark plug boot
performing any repairs, ance or cleaning work. –
ion: Carburetor and idle speed ents.
To reduce the risk of fire, do not service or store your machine near open flames.
Check the fuel filler cap for leaks at regular intervals.
Use only a spark plug of the type approved by STIHL and make sure it is in good condition – see "Specifications".
Inspect ignition lead (insulation in good condition, secure connection).
Do not turn the engine over on the starter with the spark plug boot or spark plug removed unless the slide control / stop switch is on STOP or 0 since there is otherwise a risk of fire from uncontained sparking.
Check condition of the muffler at regular intervals to reduce the risk of fires and damage to hearing. Do not operate your machine if the muffler is damaged or missing.
Do not touch a hot muffler since burn injury will result.
Vibration behavior is influenced by the condition of the AV elements – check the AV elements at regular intervals.
Check the chain catcher –and replace it if damaged.
Shut off the engine
– before checking chain tensio– before retensioning the chai– before replacing the chain.– before rectifying problems.
Observe sharpening instructiofor safe and correct handling of schain and guide bar.Keep the chain in good conditiontimes. It must be properly sharpetensioned and well lubricated.
Always change the chain, guide bsprocket in good time.
Check condition of clutch drum periodically.
Store fuel and chain lubricant in plabelled, safety-type canisters oncare when handling gasoline. Avdirect contact with the skin and ainhaling fuel vapour.
To reduce the risk of injury, stoyour saw immediately if the chaindoes not function properly.Take your saw to your local dealnot use the chainsaw until the prhas been rectified (see chapter o"Chain Brake").
17MS 381
English
You caon this chain s
The chaof the sRollommust m
Thspr(e.is mmil
If nwroruntherepope
Pull handle.
your .
r nose.
Moun
1
001B
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003
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n run chains of different pitches chainsaw – depending on the procket (see “Specifications”):
in pitch (1) must match the pitch procket and the guide bar (for atic). The drive link gauge (2) atch the bar groove width (3).
e pitch is marked on the chain ocket and guide bar in inches g. 3/8 or .325). The groove width
arked on the guide bar in limeters (e.g. 1.6).
on-matching components of the ng pitch or drive link gauge are together on the same machine y may be damaged beyond air after a short period of ration.
: Unscrew the nuts and take off the chain sprocket cover.
: Turn screw (4) counterclockwise until the tensioner slide (5) butts against left end of housing slot.
: Disengage the chain brake: hand guard (6) toward front
Wear work gloves to protecthands from the sharp cutters
: Fit the chain – start at the ba
ting the Bar and Chain
001B
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2
3a
t = a : 2
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5
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S 381
: Fit cutpoipegholspr
: Noclochabarloc
: Reandtigh
: Go
t the ith the ust still along
hain.d more se for
see
n
143B
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the guide bar over the studs (7) –ting edges on top of bar must nt to right – and engage the of the tensioner slide in locating
e (8) – place the chain over ocket (9) at the same time.
w turn tensioning screw (10) ckwise until there is very little in sag on the underside of the – and the drive link tangs are ated in the bar groove.fit the sprocket cover – screw on the nuts only finger-t. to “Tensioning the Saw Chain”.
Retensioning during cutting work:
: Shut off the engine first –and then loosen the nuts.
: Hold the bar nose up and use screwdriver to turn tensioning screw (1) clockwise until chain fits snugly against the underside of the bar.
: While still holding the bar nose up, tighten down the nuts firmly.
: Go to chapter “Checking Chain Tension”.
A new chain has to be retensioned more often than one that has been in use for some time.
: Check chain tension frequently – see chapter "Operating Instructions".
: Shut off the engine.: Wear work gloves.: Chain must fit snugly agains
underside of the bar – and, wchain brake disengaged, it mbe possible to pull the chainthe bar by hand.
: If necessary, retension the cA new chain has to be retensioneoften than one that has been in usome time.
Check chain tension frequently –"Operating Instructions".
9 77
8 10
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Tensioning the Saw Chain
1
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Checking Chain Tensio
19MS 381
English
Your engasolin
For heacontactgasolin
STIHLSTIHL MotoMcontainoctane always
STIHL formuland gu
MotoM
MixingUnratmaengengseatan
l:
ine
storing r first,
Fuel
h-o-gine
(cc)(40)200)400)600)800)000)
gine requires a mixture of e and engine oil.
lth reasons, avoid direct skin with gasoline and avoid inhaling e vapor.
MotoMixrecommends the use of STIHL ix. This ready-to-use fuel mix s no benzol or lead, has a high rating and ensures that you use the right mix ratio.
MotoMix is specially ated for use in STlHL engines arantees a long engine life.
ix is not available in all markets.
Fuelsuitable fuels or lubricants or mix ios other than those specified y result in serious damage to the ine. Poor quality gasoline or ine oil may damage the engine, ling rings, hoses and the fuel k.
GasolineUse only high-quality brand-name gasoline with a minimum octane rating of 90 – leaded or unleaded.
If your machine is equipped with a catalytic converter, you must use unleaded gasoline.
A few tankfuls of leaded gasoline will greatly reduce the efficiency of the catalytic converter.
Engine OilUse only quality two-stroke engine oil. We recommend STIHL two-stroke engine oil since it is specially formulated for use in STlHL engines and guarantees a long engine life.
If STIHL two-stroke engine oil is not available, use only quality two-stroke oil designed for use in air cooled engines. Do not use oils designed for water cooled engines or engines with a separate lubricating system (e.g. conventional four-stroke engines).
Use only STIHL 50:1 two-stroke engine oil for the fuel mix in models with a catalytic converter.
Mix RatioSTIHL 50:1 two-stroke engine oi50 parts gasoline to 1 part oil
Other high-quality two-stroke engoils:25 parts gasoline to 1 part oil
Examples
: Use a canister approved for fuel. Pour oil into the canistethen add gasoline and mix thoroughly.
Gaso-line
STIHL engine oil50:1
Other higquality twstroke enoils:25:1
Liters Liters (cc) Liters1 0.02 (20) 0.045 0.10 (100) 0.20 (
10 0.20 (200) 0.40 (15 0.30 (300) 0.60 (20 0.40 (400) 0.80 (25 0.50 (500) 1.00 (1
20
English
S 381
StorinStore fufuel canlocation
Fuel mOnly mwork. Dthan 3 Exposutempermix unu
: Thcanma
Precan
: ClefroDiscleaccand
ht.
se
001B
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M
g Fuelel only in approved safety-type isters in a dry, cool and safe protected from light and the sun.
ix ages: ix sufficient fuel for a few weeks o not store fuel mix for longer
months.re to light, the sun, low or high atures can quickly make the fuel sable.
oroughly shake the mixture in the ister before fueling your chine.
ssure may build up in the ister – open it carefully.
an the fuel tank and canister m time to time.pose of remaining fuel and aning fluid properly in ordance with local regulations environment requirements.
: Before fueling, clean the filler cap and the area around it to ensure that no dirt falls into the tank.
: Position the machine so that the filler cap is facing up.
Take care not to spill fuel while fuelling and do not overfill the tank. STIHL recommends use of the STIHL filling system (special accessory).
Opening the cap
: Raise the grip until it is uprig
: Turn the cap counterclockwi(approx. a quarter turn).
: Remove the filler cap.
Fueling
001B
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21MS 381
English
Closin
: Fit mu
: Tusto
: Focap
If the gwith thedoes noneck, thtighteneabove s
uide entally nd bar adable nded.
sistant ) since o resin. hat are in the h and oil
guide to use
g the cap
the cap - grip upright -marks st line up.rn the cap clockwise as far as p (approx. a quarter turn).
ld the grip flush with the top of the .
rip does not lie completely flush cap and the detent on the grip t engage the recess in the filler e cap is not properly seated and d and you must repeat the teps.
Change the fuel pickup body once every year: Drain the fuel tank.: Use a hook to pull the fuel pickup
body out of the tank and take it off the hose.
: Push the new pickup body into the hose.
: Place the pickup body in the tank.
For automatic and reliable lubrication of the chain and gbar – use only an environmcompatible quality chain alubricant. Rapidly biodegrSTIHL Bioplus is recomme
Biological chain oil must be reto aging (e.g. STIHL Bioplusit will otherwise quickly turn tThis results in hard deposits tdifficult to remove, especiallyarea of the chain drive, clutcchain. It may even cause thepump to seize.
The service life of the chain and bar depends on the quality of thelubricant. It is therefore essentialonly a specially formulated chainlubricant.
001B
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165B
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Chain Lubricant
22
English
S 381
If speciyou masingle gwith a voutside
DoMerencauis e
Wanecandlub
w off a
out runs
ment within
on and g work.
n in for
ain see
ation
143B
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M
al chain lubricant is not available, y - in an emergency - use an HD rade or multigrade engine oil iscosity that suits the prevailing temperature.
not use waste oil! dical studies have shown that ewed contact with waste oil can se skin cancer. Moreover, waste nvironmentally harmfull!
ste oil does not have the essary lubricating properties is unsuitable for chain
rication.
: Thoroughly clean the oil filler cap and the area round it to ensure that no dirt falls into the tank.
: Remove the filler cap.: Refill the chain oil tank every time
you refuel.: Close 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 problem in the oil supply system: Check chain lubrication, clean the oilways, contact your servicing dealer for assistance if necessary. STIHL recommends that you have maintenance and repair work performed only by a STIHL servicing dealer.
The saw chain must always throsmall amount of oil.
Never operate your saw withchain lubrication. If the chaindry, the whole cutting attachwill be irretrievably damageda very short time. Always check chain lubricatioil level in tank before startin
Every new chain has to be brokeabout 2 to 3 minutes.
After breaking in chain, check chtension and adjust if necessary –“Checking Chain Tension”.
Filling Chain Oil Tank
001B
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Checking Chain Lubric
23MS 381
English
Lockin– in a– wh– at iThe chthe hannose byor whencertain
ed by ard high
ward and is uring
if the in any
rake
e the ward rottle chain ust be
Chain
g chain with chain braken emergency
en startingdling speedain is stopped and locked when d guard is pushed toward the bar the left hand – brake is activated by inertia in
kickback situations.
Releasing the chain brake: Pull the hand guard back toward the
front handle.
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 also activatthe inertia of the front hand guif the kickback force of the saw isenough: The hand guard is accelerated tothe bar nose – even if your left hnot behind the hand guard, e.g. dfelling cut.
The chain brake will operate onlyhand guard has not been modifiedway.
Check operation of chain bBefore starting work: Run engine at idle speed, engagchain brake (push hand guard tobar nose). Accelerate up to full thfor no more than 3 seconds – themust not rotate. The hand guard mfree from dirt and move freely.
Brake
143B
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24
English
S 381
ChainThe chwear. Itand mapersonhave thperformat the f
n
he
as
ss in ng
Full-timusers:
Semi-pusers (and con
Hobby occasio
133B
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brake maintenanceain brake is subject to normal is necessary to have it serviced intained regularly by trained
nel. STIHL recommends that you e maintenance and repair work ed by a STIHL servicing dealer
ollowing intervals:
The four positions of the Master Control lever
1 = Engine off – ignition is switched off
2 = Normal run position – engine runs or can fire
To move the Master Control lever from 2 to 3 or 4, press down the throttle trigger interlock and squeeze throttle trigger at the same time.
3 = Warm start – this position is used to start a warm engine. The Master Control lever moves to the normal run position as soon as the throttle trigger is squeezed.
4 = Cold start – this position is used to start a cold engine.
Models with DecompressioValve: Press in the button to open t
decompression valve.The decompression valve closessoon as the engine fires.
: For this reason you must prethe button before each startiattempt.
e professional every 3 months
rofessional in agriculture struction): every 6
monthsandnal users: every 12
months
Information Before You Start
215B
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1234
Starting / Stopping theEngine
25MS 381
English
: ObchaWo
: PuTh
: PrelevtrigSePoPo(alsbee
g:etween es.ith
should
143B
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N
serve safety precautions – see pter on "Safety Precautions and rking Techniques".sh hand guard (1) forward: e chain is now locked.ss down the trigger interlock er (2) and pull the throttle ger (3) at the same time. t the Master Control to:sition 4 if engine is cold.sition 5 if engine is warmo use position 5 if the engine has n running but is still cold)
: Place your saw on the ground.: Make sure you have a firm footing –
check that the chain is not touching any object or the ground.
Bystanders must be well clear of the general work area of the saw.
: Hold the saw firmly on the ground with your left hand on the front handle – your thumb should be under the handlebar.
: Put your right foot into the rear handle and press down.
Alternative method of startin: Hold the rear handle tightly b
your legs, just above the kne: Hold the front handle firmly w
your left hand – your thumb be under the handlebar.
2
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1
3
45
143B
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26
English
S 381
: PurightheandtheDothe
: Do– gthecan
If the eseveral
ard
gaged ation. brake ne. ke quickly chain
hain rk.
143B
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ll the starter grip slowly with your t hand until you feel it engage – n give the grip a brisk strong pull push down the front handle at
same time. not pull out the starter rope all way – it might otherwise break.
not let the starter grip snap back uide it slowly and vertically into housing so that the starter rope rewind properly.
ngine is new, pull the starter times to prime the fuel system.
When engine begins to fire:
: Press the button to open the decompression valve again.
: Move Master Control lever (7) to position 5 and continue cranking.
: As soon as the engine runs, immediately blip the throttle trigger (8) – the Master Control lever (7) will move to the run position 9 and the engine will settle down to idling speed.
.
As the chain brake is still engaged, the engine must be returned to idling speed immediately – or the engine and chain brake might otherwise be damaged.
: Pull the hand guard back towthe front handle: = The chain brake is now disen– your saw is ready for operAlways disengage the chainbefore accelerating the engiHigh revs with the chain braengaged (chain locked) will damage the powerhead anddrive (clutch, chain brake).
: Observe safety precautions.: Always check operation of c
lubrication before starting wo
143B
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7
215B
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N8
95
27MS 381
English
At ver: Allo
thr
To shu: Mo
If fuel and th: Pre
dec: Pu
fue: No
rk plug. to cock and
es with ustion
nnect down er
to the the
215B
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N
y low outside temperatures:w engine to warm up at part
ottle.
t down the engine:ve Master Control lever to c
tank has been run until dry en refueled:ss the button to open the ompression valve.
ll starter rope several times until l system is primed.w start the engine.
If the engine does not start:If you did not move the Master Control lever to the "warm start" position quickly enough after the engine began to fire, the combustion chamber has flooded.
: Move Master Control (7) to run position.
: Loosen knob (10) in direction of arrow.
: Remove carburetor box cover (11).
: Pull off the spark plug boot.: Unscrew and dry off the spa: Set the Master Control lever: Press down the trigger interl
lever – open the throttle widecrank the engine several timthe starter to clear the combchamber.
: Install the spark plug and cothe spark plug boot (press itfirmly) – reassemble the othparts.
: Set the Master Control leverwarm start position – even ifengine is cold.
: Press the button to open thedecompression valve.
: Now start the engine.
215B
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7
10
11
28
English
S 381
DuringA factorat high first thrunnecebreak-ihave toperiod,engine The enpower a
DoachpowengCa
Alwbefthechaa sengcha
e
hile at n be
This nents l
ave
ork. ls ff, it t and
eriod:avoid d keep away need it
Oper
M
break-in periody new machine should not be run revs (full throttle off load) for the ee tank fillings. This avoids ssary high loads during the n period. As all moving parts bed in during the break-in the frictional resistances in the are greater during this period. gine develops its maximum fter about 5 to 15 tank fillings.
not make the mixture leaner to ieve an apparent increase in er – this could damage the ine – see “Adjusting
rburetor”.
ays disengage the chain brake ore opening the throttle. Running engine at higher revs with the in brake engaged (saw chain at
tandstill) will quickly damage the ine and chain drive (clutch, in brake).
During operationCheck chain tension frequentlyA new chain has to be retensioned more often than one that has been in use for some time.
Chain cold: Tension is correct when chain fits snugly against the underside of the bar and 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 – the chain may otherwise jump off the bar. Retension the chain – see “Tensioning the Saw Chain”!
Always slacken off the chain after finishing work. The chain contracts as it cools down. If it is not slackened off, it can damage the crankshaft and bearings.
After long period of full-throttloperation Allow engine to run for a short widle speed so that engine heat cadissipated by flow of cooling air. protects engine-mounted compo(ignition, carburetor) from thermaoverload.
After finishing work: Slacken off the chain if you h
retensioned it at operating temperature during cutting wThe chain contracts as it coodown. If it is not slackened ocould damage the crankshafbearings.
Storing your saw for a short pWait for engine to cool down. To condensation, fill the fuel tank anthe machine in a dry place, well from sources of ignition, until youagain.
Storing for a long period:See “Storing the Unit”!
ating Instructions
29MS 381
English
Differendifferencutting
: Usundoil
: E =rat(Em
: To scr
: To scrYowit
* Speci
ified:
e oove – ride on
Oil QCont
um e
mmmm
t quantities of oil are required for t bar lengths, types of wood and techniques.
e the adjusting screw (1) (on erside of machine) to vary the
feed rate as required. Ematic position, medium oil flow
e - turn adjusting screw to "E" atic position)
increase oil feed – turn adjusting ew clockwise.reduce oil feed – turn adjusting ew counter-clockwise.ur chain must always be wetted h a film of lubricant.
al accessory
: Turn the 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.
: Regularly clean the oil inlet hole (1), the oilway (2) and the bar groove (3).
: Measure groove depth – with scale on filing gauge* – in area used most for cutting.
* see “Guide to Using this Manual”
If groove depth is less than spec
: Replace the guide bar.The drive link tangs will otherwisscrape along the bottom of the grthe cutters and tie straps will not the bar rails.
uantity rol *
001B
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1
Taking Care of Guide Bar
2
001B
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N
1
3
3
Chain type
Pitch Minimgroovdepth
Picco 3/8" P 5.0 mRapid 1/4" 4.0 mRapid 3/8"; 0.325" 6.0 mRapid 0.404" 7.0 m
30
English
S 381
Dirty aiincreasstarting
If thereengine
: Moto t
: Looarr
: Recov
: Clethe
in clean, . warm
ilter.
nents.(8) and eated:g (9)
).filter in
Clean
M
r filters reduce engine power, e fuel consumption and make more difficult.
is a noticeable loss of power
ve the Master Control lever (1) he normal run position.sen knob (2) in direction of
ow.move the carburetor box er (3). an away loose dirt from around filter.
: Unscrew the slotted nuts (4).: Remove the filter (5) and separate
the two halves of the filter.: Take out the screw (6) in the
carburtetor box cover and remove the prefilter (7).
: Knock the filter out on the palm of your hand or blow it clear with compressed air from the inside outwards.
Do not use a brush to clean the fleece filter.
In case of stubborn dirt:: Wash the filter components
STIHL universal cleaner or anon-flammable solution (e.gsoapy water) and then dry.
: Always replace a damaged f
: Reassemble the filter compo: Make sure the choke shutter
torsion spring are properly sThe hook of the torsion sprinmust engage the slot (arrow
: Secure the main filter and preposition.
: Fit the carburetor box cover.
ing the Air Filter
215B
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N
1
2
34
215B
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N
5
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N6
7
31MS 381
English
GenerYour cawith a s
This is baromeconditio
It ensurmaximuoperate
Retuninchangealtitude
Adjustmchangemaximurunning
If ththedueove
or
il it is
hain
tting, ) to speed rpm ned
ean mage and
Adjus
al Informationrburetor comes from the factory tandard setting.
the optimum setting under the tric pressure and climatic ns at the factory.
es your machine will deliver m power, be fuel efficient and reliably.
g may be necessary if there is a in barometric pressure (weather, ), temperature or humidity.
ent of the high speed screw s the power output and m RPM of the engine when it is off load.
e mixture is made too lean re is a risk of engine damage to insufficient lubrication and rheating.
Standard Setting(without tachometer)
: Shut off the engine.: Check the air filter and clean or
replace it if necessary.: Carefully screw both adjusting
screws down onto their seats (clockwise).
: Open high speed screw (H) one full turn.
: Open the low speed screw (L) one full turn.
If you do not have a tachometer, do not set the high speed screw any leaner by turning it beyond the standard setting.
Fine Tuning (with tachometer): Check the air filter and clean
replace it if necessary.: Check chain tension.: Start the engine and run unt
warm.: Adjust idle speed correctly (c
must not rotate).: Starting from the standard se
use the high speed screw (Hadjust the maximum engine with a tachometer to 12,500(with bar and properly tensiochain).
If the mixture is made too lthere is a risk of engine dadue to insufficient lubricationoverheating.
ting the Carburetor
215B
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LH
32
English
S 381
Adjus
Engine
: Opfull
: Tuclothetur
Chain
: Opfull
: Tucourunqua
ult to , first
ngine".
g
000B
A00
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N
M
ting Idle Speed
stops while idling
en the low speed screw (L) one turn.rn the idle speed screw (LA) ckwise until chain begins to run – n turn it back one quarter of a n.
runs when engine is idling
en the low speed screw (L) one turn.rn the idle speed screw (LA) nterclockwise until chain stops ning – then turn screw another rter turn in the same direction.
Erratic idling behavior, poor acceleration(even though the low speed screw is opened one turn)
Idle setting is too lean.
: Turn the low speed screw (L) counterclockwise until engine runs and accelerates smoothly.
It is usually necessary to change the setting of the idle speed screw (LA) after every correction to the low speed screw (L).
If engine is down on power, difficstart or runs poorly at idle speedcheck the spark plug.
: Remove the spark plug – see "Starting / Stopping the E
: Clean dirty spark plug.: Check electrode gap (A) and
readjust if necessary – see "Specifications".
215B
A01
1 K
N
L
Checking the Spark Plu
33MS 381
English
: Recau
– To – Dir– Un
: FitabsooeroInsof tsee
To redand fir
: If thdeton
er, reen in
own.
casing
ual”
in
538B
A003
KN
ctify the problems which have sed fouling of spark plug:much oil in fuel mix.ty air filter.favorable running conditions.
a new spark plug after out 100 operating hours – or ner if the electrodes are badly ded. tall only suppressed spark plugs he type approved by STIHL – "Specifications".
uce the risk of arcing e:
e spark plug comes with a achable adapter nut (1), screw it firmly.
On all spark plugs: : Always press the boot (2) firmly on
to the spark plug (3).
: If the engine is down on powcheck the spark arresting scthe muffler.
: Wait for the muffler to cool d: Take out the screw (1).: Remove the muffler exhaust
(2).
* see “Guide to Using this Man
1
000B
A04
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N
3
000B
A05
0 K
N
2
Spark Arresting ScreenMuffler*
1 1
1 1
2
34
English
S 381
: Puscr
: CleIf thcar
: Rethe
ope (5)
from re the e grip.
h the ide
or and and
215T
I014
KN
M
ll out the spark arrestingeen (3).an the spark arresting screen.e screen is damaged or heavily
bonized, fit a new one.fit the spark arresting screen and muffler exhaust casing.
: Remove the screws (1). : Lift the fan housing from the
crankcase and pull it away to sideways.
: Use a screwdriver or suitable pliers to carefully remove the spring clip (2) from the starter post.
: Carefully remove the rope rotor with washer (3) and pawl (4).The rewind spring may pop out during this procedure – take care to avoid injury.
: Use a screwdriver to pry the rout of the starter grip.
: Remove the remaining ropethe rotor and grip, making susleeve is not pushed out of th
: Thread the new rope througtop of the starter grip and gubushing (6).
: Pull the rope through the rotsecure it with a simple overhknot.
538B
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3
Replacing Starter Rope and Rewind Spring
1
11
215B
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N
43
2
215B
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N
6
5
35MS 381
English
: Cores
: Slipit bloo
: Fit : Fit
pos: Us
to istapawpoiillu
and
be part e fan
y, wear work
ly g.
h a few
at rope rotor bearing bore with in-free oil. rotor over the starter post – turn
ack and forth to engage anchor p of the rewind spring.the pawl (4) in the rope rotor.the washer (3) on the starter t.
e a screwdriver or suitable pliers nstall the spring clip (2) on the rter post and engage it on the l’s peg – the spring clip must
nt clockwise as shown in the stration.
Tensioning the Rewind Spring
: Make a loop in the unwound starter rope and use it to turn the rope rotor seven full revolutions in the direction of the arrow.
: Hold the rotor steady – pull out and straighten the twisted rope.
: Release the rope rotor.: Let go of rope slowly so that it winds
onto the rotor.
The starter grip must locate firmly in the rope guide bushing. If the grip droops to one side: Increase spring tension by adding one more turn.
When the starter rope is fully extended it must still be possible to rotate the rotor another half turn. If this is not the case, the spring is overtensioned and could break.
: Take one turn of rope off the rotor in such a case.
Replacing a Broken RewindSpring: Remove the rope rotor.
: Remove the spring housing parts of the spring.The bits of spring might still under tension and could fly awhen you take them out of thcover. To reduce risk of injureye and face protection andgloves.
: Use a screwdriver to carefulremove the parts of the sprin
: Lubricate the new spring witdrops of non-resinous oil.
43
2
215B
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N
215B
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N
36
English
S 381
: Fit plaspr
: Re: Ten: Re
dow
: If thdurcouout
cover,
ront
et
after
arks han ould ou can cial pth of .
riginal ct
g
001B
A12
1 K
N
M
the new spring housing – bottom te must face up – engage outer ing loop on lug.fit the rope rotor.sion the rewind spring.
fit the fan housing and tighten it n firmly.
e spring pops out of the housing ing installation: Refit it in the nterclockwise direction, starting side and working inwards.
For periods of about 3 months or longer:
: Drain and clean the fuel tank in a well ventilated area.
: Dispose of remaining fuel and cleaning solution properly in accordance with local environmental requirements.
: Run engine until carburetor is dry, this helps prevent the carburetor diaphragms sticking together.
: Remove the saw chain and guide bar, clean them and spray with corrosion inhibiting oil.
: Thoroughly clean the unit, pay special attention to the cylinder fins and air filter.
: If you use a biological chain and bar lubricant, e.g. STIHL BioPlus, completely fill the chain oil tank.
: Store the unit in a dry and high or locked location, out of the reach of children and other unauthorized persons.
: Remove the chain sprocket chain and guide bar.
: Disengage the chain brake:Pull hand guard toward the fhandle.
Replacing the Chain Sprock
– Replace the chain sprocket using two Oilomatic chains.
– Replace sooner if the wear mon the sprocket are deeper tapprox. 0.5 mm since this wreduce the life of the chain. Yuse a reference gauge (SpeAccessories) to check the dethe wear marks on sprockets
It is best to use two chains inrotation with one sprocket.
STIHL recommends the use of oSTIHL sprockets to ensure correoperation of the chain brake.
215B
A01
7 K
N
Storing the Machine Checking and ReplacinChain Sprocket
37MS 381
English
Rim Sp
: Usthe
: Tak: Ex
druins
: Rewit
: Recra
orm (9) pulling
r clutch r gear
om the
gear n or
215B
A02
0 K
N
9
rocket
e a screwdriver to remove E-clip (1).e off the washer (2).
amine the splines on the clutch m – if wear marks are severe, tall a new clutch drum.place the rim sprocket (3) h cavities facing outward.fit the washer and E-clip on the nkshaft.
Spur Sprocket, Clutch Drum
: Use a screwdriver to remove the E-clip (1).
: Take off the washer (2). : Use circlip pliers (Special
Accessories) to remove the circlip (4).
: Take out the screws (5).: Remove the side plate (6) and
cover (7) with cover washer (8).
: Remove the oil pump drive wby rotating it clockwise whileit off the pump shaft.
: Remove the spur sprocket odrum (10) with sprocket, spu(11) and needle cage (12) frcrankshaft.
Check serviceability of spur and worm. Replace any wordamaged parts.
1 215B
A01
9 K
N8
5
67
524
10
11
12
38
English
S 381
Install i
: CleneeSTAc
: Pusprgea
: Enrotpus
: LubwitAc
: Fit plafirm
: Inssprloc
: Rewit
: Fit cra
M
n the reverse sequence:
an the stub of the crankshaft and dle cage and lubricate with
lHL grease (Special cessories).sh the needle cage, spur ocket and clutch drum with spur r onto the crankshaft.
gage the oil pump drive worm by ating it counterclockwise while hing it onto the pump shaft.ricate the worm and spur gear
h STlHL grease (Special cessories).the cover, cover washer and side te, fit screws and tighten down ly.
tall the circlip on the spur ocket – each end of the ring must ate on the top of a tooth.place the rim sprocket (3) h cavities facing outward.the washer and E-clip on the nkshaft.
39MS 381
English
CorrecA propethroughvery litt
Do not chain aeffort reproducand a h
: Cle: Ch
link: Re
of tparorigIt iswitspeincpartookicres
g tools
MainSaw
le (°)B856085
689B
A02
1 K
N
tly sharpened chainrly sharpened chain slices wood effortlessly and requires le feed pressure.
work with a dull or damaged s it will increase the physical quired, cause high vibrations,
e unsatisfactory cutting results igher rate of wear.
an the chain.eck the chain for cracks in the s and damaged rivets.place any damaged or worn parts he chain and match the new ts to the shape and size of the inal parts. absolutely essential to comply
h the angles and dimensions cified below. If the saw chain is orrectly sharpened – and in ticular if the depth gauge is set low – there is a risk of increased kback of the chainsaw, with ulting risk of injury.
The chain pitch (e.g. 3/8") is marked on the depth gauge end of each cutter.
Use only special saw chain sharpening files. Other files have the wrong shape and cut.
Select file diameter according to chain pitch – see table “Sharpening Tools”.
You must observe certain angles when resharpening the chain cutter.
A = Filing angleB = Side plate angle
Cutter shapes:Micro = Semi-chiselSuper = Full chisel
The specified angles A and B areobtained automatically if the recommended files or sharpeninand correct settings are used.
taining and SharpeningChain
3/8
689B
A02
0 K
N
Chain type AngA
Rapid-Micro (RM) 30Rapid-Super (RS) 30Picco-Micro (PM/PMN) 30
A
B
40
English
S 381
Furthersame ounevenstraightbreak.
As thesafter su
: UsA file housed fo"Sharpangles
ke ble – le are
t right nd file ked on lder on e.
689B
A01
8 K
N90°
689B
A04
3 K
N
M
more, the angles must be the n all cutters. If angles are : Chain will run roughly, not in a line, wear quickly and finally
e requirements can be met only fficient and constant practice:
e a file holderlder (special accessory) must be r manual resharpening (see table ening Tools"). The correct filing are marked on the file holder.
For checking angles
Use a STlHL filing gauge (special accessory – see table "Sharpening Tools"). This is a universal tool for checking the filing and side plate angles, depth gauge setting and cutter length. It also cleans the guide bar groove and oil inlet holes.
File correctly: Select sharpening tools according
to chain pitch.: Clamp the bar in a vise if necessary.: Lock the chain – push hand guard
forward.: To rotate the chain, pull the hand
guard against the front handle to disengage the chain brake. On models with QuickStop Super, also press down the throttle trigger interlock lever.
: Sharpen chain frequently, taaway as little metal as possitwo or three strokes of the fiusually enough.
: Hold the file horizontally (aangle to side of guide bar) aaccording to the angles marthe file holder. Rest the file hothe top plate and depth gaug
689B
A02
5 K
N
90°60°85° 70° 80°
0°
35°
10°
30°
689B
A02
2 K
N
41MS 381
English
: Alwout
: Thforlift bac
: Avdriv
: Rowh
: Usbur
: Ch
All cutte
If the cuthey wimakes cause i
: Finall lencondongrin
ed
he en the
he rojects pth
ntil it is
689B
A04
7 K
N68
9BA
051
KN
ays file from the inside to the side of the cutter.e file only sharpens on the ward stroke – the file off the cutter on the kstroke.
oid touching the tie straps and e links with the file.
tate the file at regular intervals ile filing to avoid one-sided wear.e a piece of hardwood to remove rs from cutting edge.eck angles with the filing gauge.
rs must be the same length.
tters are not the same length, ll have different heights. This the chain run roughly and can t to break.
d the shortest cutter and then file other cutters back to the same gth. This can be very time suming – it is best to have it e in the workshop on an electric der.
Depth gauge setting
The depth gauge determines the height at which the cutter enters the wood and thus the thickness of the chip removed.
Specified distance or setting between depth gauge and cutting edge = a:
This setting may be increased by 0.2mm (0.008") for cutting softwood in mild weather season – no frost.
Lowering depth gaugesThe depth gauge setting is reducwhen the chain is sharpened.
: Use a filing gauge to check tsetting every time you sharpchain.
: Place a filing gauge (1) that matches the chain pitch on tchain – if the depth gauge pfrom the filing gauge, the degauge has to be lowered.
: File down the depth gauge ulevel with the filing gauge.
Chain pitch Depth gaugesetting “a“
Inch (mm) mm (inch)1/4 (6.35) 0.65 (0.026)3/8 PMN (9.32) 0.45 (0.018)3/8 PM (9.32) 0.65 (0.026)0.325 (8.25) 0.65 (0.026)3/8 (9.32) 0.65 (0.026)0.404 (10.26) 0.80 (0.031)
689B
A02
3 K
N
a
1
42
English
S 381
: FileparmalowgauThchagau
ive link along
umped k must crease
hain chain
riod, n a
SharpeChain p ng kit2)
inch1/4 10273/8 PMN 10263/8 P 10270.325 10283/8 10290.404 1030
1) Use 2) cons
M
the top of the depth gauge allel to the stamped service rking (see arrow) – but do not er the highest point of the depth ge in this process.
e kickback tendency of the insaw is increased if the depth ges are too low.
: Place filing gauge on the chain – highest point of depth gauge must be level with the filing gauge.
PM 1, RM2:Rear hump of tie strap (with service marking) is lowered along with the depth gauge.
RSC3, RMC3, PMC3:The upper part of the humped dr(with service marking) is loweredwith the depth gauge.
The other parts of the triple-htie strap and humped drive linnot be filed since this may inthe kickback tendency of thechainsaw.
: After sharpening, clean the cthoroughly, remove filings orgrinding dust – lubricate the thoroughly.
: Before long out-of-service peclean the chain and store it iwell-oiled condition.
689B
A04
4 K
N
689B
A05
2 K
Nning Tools (special accessories)itch Round file Ø Round file File holder Filing gauge Flat file1) Sharpeni
(mm) mm (inch) Part No. Part No. Part No. Part No. Part No.(6.35) 4.0 (5/32) 5605 772 4006 5605 750 4327 1110 893 4000 0814 252 3356 5605 007(9.32) 4.0 (5/32) 5605 772 4006 5605 750 4327 0000 893 4000 0814 252 3356 5605 007(9.32) 4.0 (5/32) 5605 772 4006 5605 750 4327 1110 893 4000 0814 252 3356 5605 007(8.25) 4.8 (3/16) 5605 772 4806 5605 750 4328 1110 893 4000 0814 252 3356 5605 007(9.32) 5.2 (13/64) 5605 772 5206 5605 750 4329 1110 893 4000 0814 252 3356 5605 007(10.26) 5.5 (7/32) 5605 772 5506 5605 750 4330 1106 893 4000 0814 252 3356 5605 007
triangular file 0811 421 8971 for PM1 and RM2isting of file holder with round file, flat file and filing gauge
43MS 381
English
1) STIbe d
2) see
Main
Pleaseoperatcuttingtropicause th if
dam
aged
as re
quire
d
Comple
ThrottleControl
Chain bX
Pickup b
X
Fuel tan
Chain o
Chain lu
Saw cha
X
Guide bX
X
Chain s
Air filterX
Antivibr
Cooling
Cylinde
HL recommends that this work one by a STIHL servicing dealer
"Chain brake"
tenance Chart
note that the following maintenance intervals apply for normal ing conditions only. If your daily working time is longer than normal or conditions are difficult (very dusty work area, resin-rich wood, l wood etc.), shorten the specified intervals accordingly. If you only
e saw occasionally, extend the intervals accordingly. befo
re
star
ting
wor
k
afte
r fin
ishi
ngw
ork
or d
aily
afte
r eac
hre
fuel
ing
stop
wee
kly
mon
thly
ever
y 12
mon
ths
if pr
oble
m
te machineVisual inspection (condition, leaks) X X
Clean X
trigger, trigger interlock, Master Check operation X X
rakeCheck operation X X
Have checked by servicing dealer1)2)
ody/filter in fuel tank
Check X
Clean, replace filter element X X
Replace pickup body X X
k Clean X
il tank Clean X
brication Check X
in
Inspect, also check sharpness X X
Check chain tension X X
Sharpen
ar
Check (wear, damage) X
Clean and turn over
Deburr X
Replace X
procket Check X
Clean X
Replace X
ation elementsInspect X X
Have replaced by servicing dealer1) X
inlets Clean X
r fins Clean X X
44
English
S 381
1) STIbe d
2) Firmof pmorope
* see
Pleaseoperatcuttingtropicause th as
requ
ired
CarbureX
Spark p
All acce(not adj X
Spark a
Chain c
Safety l
M
HL recommends that this work one by a STIHL servicing dealerly tighten cylinder base screws
rofessional saws (3.4 kW or e) after 10 to 20 hours of ration
“Guide to Using this Manual“
note that the following maintenance intervals apply for normal ing conditions only. If your daily working time is longer than normal or conditions are difficult (very dusty work area, resin-rich wood, l wood etc.), shorten the specified intervals accordingly. If you only
e saw occasionally, extend the intervals accordingly. befo
re
star
ting
wor
k
afte
r fin
ishi
ngw
ork
or d
aily
afte
r eac
hre
fuel
ing
stop
wee
kly
mon
thly
ever
y 12
mon
ths
if pr
oble
m
if da
mag
ed
torCheck idle adjustment – chain must not rotate X X
Readjust idle
lugReadjust electrode gap X
Replace after about 100 operating hours
ssible screws and nuts usting screws) 2) Retighten
rresting screen* in mufflerInspect X
Clean or replace X
atcherCheck X
Replace X
abel Replace X
45MS 381
English
Observhelps rewear an
The pomaintaiand attmanua
The uscausedprecauinstructin partic
– Altpro
– Usarethe
– Uswh
– Uscom
– Cocondef
earsubject ring with e type placed
:
MinimAvoid
ing the instructions in this manual duce the risk of unnecessary d damage to the power tool.
wer tool must be operated, ned and stored with the due care ention described in this owner’s l.
er is responsible for all damage by non-observance of the safety tions, operating and maintenance ions in this manual. This includes ular:
erations or modifications to the duct not approved by STIHL.ing tools or accessories which neither approved or suitable for product or are of a poor quality.ing the product for purposes for ich it was not designed. ing the product for sports or
petitive events.nsequential damage caused by tinuing to use the product with ective components.
Maintenance WorkAll the operations described in the "Maintenance Chart" must be performed on a regular basis. If these maintenance operations cannot be performed by the owner, they should be performed by a servicing dealer.
STIHL recommends that you have maintenance and repair work carried out only by an authorized STIHL servicing dealer. STIHL servicing dealers are able to attend regular training courses and receive technical information bulletins on the latest engineering changes.
If these operations are not carried out as specified, the user assumes responsibility for any damage that may occur. Among other things, this includes:
– Damage to the engine due to neglect or deficient maintenance (e.g. of air and fuel filters), incorrect carburetor adjustment or inadequate cleaning of cooling air inlets (intake ports, cylinder fins).
– Corrosion and other consequential damage resulting from improper storage.
– Damage to the product resulting from the use of poor quality replacement parts.
Parts Subject to Wear and TSome parts of the power tool are to normal wear and tear even duregular operation in accordance instructions and, depending on thand duration of use, have to be rein good time. Among other parts, this includes
– Saw chain, guide bar– Drive components (Clutch,
clutch drum, chain sprocket)– Filters (air, oil, fuel)– Starter mechanism– Spark plug– Components of anti-vibration
system
ize Wear and Damage
46
English
S 381
ck
ual"
Main
M
1 Carburetor box cover twist lo 2 Carburetor adjusting screws 3 Spark plug boot 4 Decompression valve* 5 Chain brake 6 Chain sprocket 7 Chain sprocket cover 8 Chain tensioner 9 Chain catcher 10 Spiked bumper 11 Guide bar 12 Oilomatic saw chain # Serial number
13 Oil tank filler cap 14 Muffler with spark arresting
screens*15 Front hand guard 16 Front handle (handlebar)17 Starter grip18 Fuel tank filler cap 19 Master Control lever 20 Throttle trigger 21 Throttle trigger interlock 22 Rear handle 23 Rear hand guard
* see "Guide to Using this Man
Parts and Controls
4
8
538B
A00
1 K
N
#1 2
3
56
79
10
11
12
17
1615
13
14 21
22
2320
19
18
538B
A00
2 K
N
47MS 381
English
EnginSTIHL
1) Weidlinsam
2) Low
during
ore pecial
DisplacBoreStrokeMS 381Engineto ISO
MS 381Engineto ISO
Idle speMaximuengine and cha
SoundLpeq toSoundLweq toVibratimeasuto ISO Left haRight h
Spec
esingle cylinder two-stroke engine
ighted equivalent level includes g, full load and racing with the e duration of exposure compression engine
Magneto ignition system,electronic
Spark plug (suppressed) Bosch WSR 6 F, NGK BPMR 7 A,Electrode gap: 0.5 mm
CarburetorAll position diaphragm carburetor with integral fuel pump
Fuel tank capacity: 0.68 l (680 cm3)
Oil tank capacity: 0.36 l (360 cm3)
Weight (without cutting attachment)6.6 kg
Cutting Attachment:Guide barsRollomatic, Duromatic
Cutting lengthsRollomatic 37, 40, 45, 50, 55 and 63 cmDuromatic 37, 40, 45, 50, 55 and 63 cm
Oilomatic chain9.32 mm (3/8") RapidDrive link gauge: 1.6 mm
Chain sprockets7 and 8-tooth rim sprockets 7-tooth spur sprocket
Chain lubricationFully automatic, speed-controlled rotary piston oil pump. Additional manual oil flow control
File holder with round file
Filing gauge
Reference gauges
STIHL lubricating grease
STIHL filler nozzle for STIHL canisters
helps avoid spills and overfilling refueling.
Contact your STIHL dealer for minformation on these and other saccessories.
ement 72.2 cm3
52 mm34 mm
power 7293 3.9 kW
(5.3 HP) N2)
power 7293 3.6 kW
(4.9 HP)ed 2,400 rpmm permissible speed with bar in 12,500 rpm
pressure level ISO 22868
1) 102,3 dB (A) power level ISO 9207 1) 113,9 dB (A)on rement aeq 7505 1)
ndle 5.2 m/s2
andle 7.1 m/s2
ifications Special Accessories
48
English
S 381
Pleasenumbethe guidspacesorderin
The guto normWhen pquote tand na
Model
Serial n
Guide b
Chain p
arry work
out
carried er. aining e
y use en r tool ly use order amage
enuine
ified by Hl l (. n small
Orde irs
M
enter your saw model, serial r as well as the part numbers of e bar and saw chain in the
provided. This will make re-g simpler.
ide bar and saw chain are subject al wear and tear. urchasing these parts, always
he saw model, the part numbers mes of the parts.
umber
ar part number
art number
Users of this machine may only cout the maintenance and servicedescribed in this user manual. All other repairs must be carried by a servicing dealer.
STIHL recommends that all maintenance and repair work be out by an authorized STIHL dealSTIHL dealers regularly attend trcourses and are supplied with thnecessary technical information.
When repairing the machine, onlreplacement parts which have beapproved by STIHL for this poweor are technically equivalent. Onhigh-quality replacement parts into avoid the risk of accidents or dto the machine.
STIHL recommends the use of gSTIHL replacement parts.
Original STlHL parts can be identthe STIHL part number, the STIlogo and the STlHL parts symboThe symbol may appear alone oparts.
ring Spare Parts Maintenance and Repa
49MS 381
English
ANDREBadstr.71336
certify tbelow
conformDirectiv
The promanufafollowinEN ISOEN 550
The mepower lto Directhe ISO
measur115 dBguaran116 dB
he
ctured ents of f
y, rvice.
CategoMake:Model:Serial iDisplac
Manuof co
000B
A02
6
AS STIHL AG & Co. KG 115Waiblingen
hat the new machine described
s to the specifications of es 98/37/EC and 89/336/EEC.
duct has been developed and ctured in compliance with the g standards: 11681-1, EN 61000-6-1, 12
asured and guaranteed sound evel was determined according tive 2000/14/EC, Annex V, using 9207 standard.
ed sound power level: (A) teed sound power level: (A)
Technical documents deposited at: ANDREAS STIHL AG & Co. KGProduktzulassung(Product Licensing)
The CE type examination was carried out by
Deutsche Prüfstelle für Land- und Forsttechnik (DPLF)Postfach 41 03 5634114 Kassel
Certification number K-EG-2003/3756
See CE label for machine’s year of manufacture.
Waiblingen, September 12, 2006
ANDREAS STIHL AG & Co. KG
ElsnerDirector Group Product Management
All STIHL products comply with thighest quality standards.
An independent organization hascertified that all products manufaby STIHL meet the strict requiremthe ISO 9001 standard for qualitymanagement systems in terms oproduct development, materials purchasing, production, assembldocumentation and customer se
ry: ChainsawSTIHLMS 381
dentification: 1119ement: 72,2 cm3
facturer's declaration nformity
Quality Certification
50
English
MS 381
51MS 381
English
52
English
MS 381
0458 538 0121 A
englisch / English
BA_MS381_01_U_M6.book Seite 1 Montag, 6. November 2006 10:15 10
