Makita EM4250 User manual

Brush Cutter
Decespugliatore
Desbrozadora
EM4250
EM4250
I@
English I ltaliano I Spanish
RECEIVED
FER 1 4 2000
Grass Trimmer
Tagliabordi
Cortabordes
EM4251
Important:
Readthis instructionmanualcarefullybefore puttingthe BrushCuHedGrassTrimmer into operation and strictly observe the safety
regulations1
Preserveinslruclionmanualcarefullyl
Importante:
Primadi meltereinfunzione
il decespugliatore/lagliabordi, leggere attentamenle il presente manuale; rispellarerigorosamenle le norme
di sicureual
Conservare
it manualedelle islruzioniper I'usol
Importante:
Leer cuidadosamente
este manualde inslruccionesantes de poner en marchala mequinay observar estriclamenlelas normasde
segurldad.
Conservar
esle manualde inslruccionesconcuidado.
.-
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Thank you very muchfor purchasingthe MAKITA BrushCuner/Grass trimmer.
We are pleased
to recommendto you the MAKITA Brush Cuner/Grasstrimmer
which isthe result of a long developmentprogrammeand many years of
knowledgeand experience.
Pleasereadthis bookletwhich refers indetail
lo the variouspointsthat will
demonstrate its outstandingperformance. This will assistyou to obtainthe
best possibleresultfrom your MAKITA BrushCutlerlGrasstrimmer.
Table
of Contents Page
Symbols .................................................. 1
Safety instructions ..................................................... 2
Technical data ........................................
Designation ............................. 7
Mountingof ........................................... 8
Mounlingof ........................
Before start of operation .......................................... 11
Correcthandlingof machine ....
Mountingof
Resharpeningthe cuHi
Servicinginslruclions
......................................... 20
You will nole the followingsymbols when readingthe instructionsmanual.
ReadinstructionManual
Take Particularcare andAnention
Forbidden
Keepdistance
Flyingobject hazard
No Smoking
No openflame
Protective gloves must be worn
Kickback
Keepthe area of operationclear of all
personsand pets
Wear eye and ear protection
(for Grass trimmer only)
Wear protectivehelmet, eye and ear
protection(for BrushCutter only)
Donot
use metalblades
(for grasstrimmer only)
Top permissibletoolspeed
Fuel(Gasoline)
Engine-Manualstart
Emergencystop
FirstAid
Recycling
OWTART
I
0 OFFlSTOP
1

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Start the BrushCutter/Grass trimmer only in accordancewith the instructions.
-Use the BrushCuWGrass trimmer and the tools only for such applications
-Only start the BrushCutterlGrasstrimmer engine, aHer the entireassembly is
Do not useany other methodsfor startingthe engine1
as specified.
done. Operationof the device
Is onlypermittedafter all the appropriate
accessories areattached1
-Before startingmakesure that the cutting tool has no contact with hard
objects such as branches, stones etc. as the cutting
tool will revolvewhen
starting.
-The engine islobe switched
off immediatelyincase of any engine problems.
-Should the cutting
tool hitstones or other hardobjects, immediately switch off
the engine and inspect the cuttingtool.
-Inspect the cuttingtool at short regular intervalsfor damage (detectionof
hairline cracks by meansof tapping-noisetest).
-Operate the BrushCuHer/Grasstrimmer only with the shoulder strap attached
which is
to be suitably adjusted beforeputtingthe Brush CuttedGrasstrimmer
intooperation.
It isessentialto adjust the shoulder strap according to the
user's size to prevent fatigue occurringduringuse. Never hold the cutterwith
one handduring use.
hands.
Always ensure a safe footing.
inhalationof the exhaust gases. Never runthe engine
in enclosed rooms
(risk of gas poisoning). Carbon monoxide
Is an odorless gas.
-Switch
off the engine when restingandwhen leavingthe BrushCuttdGrass
trimmer unattended, andplace it ina safe locationto prevent danger to
others or damage
to the machine.
-Never putthe hot BrushCuHer/Grasstrimmer onto dry grass or onto any
combustible materials.
-The cutting
tool has to be equipped with it's appropriate guard.
Never runthe cutterwithout this guard1
-All protectiveinstallationsand guards suppliedwith the machine must be
usedduringoperalion.
-Never operate the engine with faultyexhaust muffler.
-Shut
off the engine during transport.
-During transport over longdistancesthe toolprotectionincludedwith the
equipmentmust always be used.
-Ensure safe positionof the BrushCutter/Grass trimmer duringcar transporta-
tion
to avoid fuel leakage.
-When transportingthe BrushCutter/Grass trimmer, ensure that the fueltank
iscompletely empty.
-When unloadingthe BrushCutter/Grasstrimmer from the truck, never drop
the Engine to the ground
or this mayseverely damagethe fuel tank.
-vency,never drop or cast the BrushCuttedGrass
trimmer to the ground or this may severely damagethe BrushCutterlGrass
.- trimmer.
-Remember
to liftthe entire equipment from the groundwhen movingthe
equipment. Draggingthe fueltank ishighlydangerous and
will cause
damage and leakage of fuel, possiblycausingfire.
-During operationalways holdthe BrushCuttedGrasstrimmer with both
-Operate the BrushCutter/Grass trimmer insuch a manner as
to avoid
Refuelling
-Shut off the engine during refuelling,keepaway from open flames and do
not smoke.
-Avoid skincontactwith mineraloil products. Do not inhalefuel vapor.
Always wear protective gloves during refuelling. Change and clean
protectiveclothing at regular intervals.
-Take carenot
to spill either fuelor oilinorder to prevent soil contamination
(environmental protection). Clean the BrushCutter/Grass trimmer Immedi-
ately after fuel hasbeenspilt.
-Avoid any fuel contact with your clothing. Changeyour clothinginstantly
if
fuel hasbeen spilt on it (to prevent clothingcatchingfire).
-Inspect the fuelcap at regular intervalsmakingsurethat itcanbe securely
fastenedand does not leak.
-Carefully tightenthe fuel tank cap. Changelocationto start the engine (at
least
3 metersaway from the place of refuelling).
-Never refuelinclosedrooms. Fuelvapors accumulate at ground lever (risk of
explosions).
-Only transport and storefuel inapprovedcontainers. Makesure the fuel
stored is not accessible
to children.
3
STOP -
0
- Resting
* Transport
- Refuelling
- Maintenance
- Tool Replacement
n
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Method of Operation
-Only usethe Brushcutter/Grasstrimmer ingoodlight and visibility. During
the winter seasonbeware
of slipperyor wet areas, ice and snow (risk of
slipping). Always ensure a safe footing.
-Never cut abovewalst height.
-Never standon a ladderand runthe Brushculter/Grars trimmer.
-Never climbup Into trees to performcutting operationwith the Brushcutter/
-Never work onunstablesurfaces.
-Remove sand, stones, nailsetc. foundwithin the working range.
Grass trimmer.
Foreignparticlesmay damage the cuttingtooland can cause dangerous
kick-backs.
-Before commencingcutting, the cutting
tool must have reachedfullworking
speed.
Kickback
-When operatingthe brushcutter. uncontrolledkickback may occur.
-This is particularlythe casewhen attemptingto cut withina blade segment
-Never apply the brushcutterwithin a segment between12and
2 o'clock.
-Never apply this segment
of the brushcutter bladeto solids, such as bushes
between 12and 2 o'clock.
andtrees, etc.. having a diameter inexcess
of 3 cm or the brushcutter will be
deflectedat great forcewith the risk
of injuries.
Kickbackprevention
To avoldklckbacks, observe the followlng:
-Operation within a blade segment between
12 and 2 o'clock presentspositive
hazards, especially when usingmetalcuttingtools.
-Cutting operations within a bladesegment between 11 and
12 o'clock, and
between
2 and5 o'clock, must only be performed by trainedand experienced
operators, andthenonly at their own risk.
Easycuttingwith almost no kickback ispossiblewithin a bladesegment
between
8 and 11o'clock.
CuttingTools
Employonly the correct cutting
tool for the job inhand.
EM4250. EM4251with cutter blade (Star Blade
(4 teeth), EddyBlade (8 teeth)),
Nyloncuttinghead
For cuttingthick materials,such as weed, highgrass, bushes, shrubs,
underwood,thicket etc. (max.
2 cm dia. thickness). Perform this cuttingwork
by swinging the brushcutter evenly inhalf-circlesfrom right to left (similar
to
usinga scylhe).
Maintenanceinstructions
-The condltion
of the cutter, inparticular of the cutting tool of the protective
devices and also
of the shoulder strapmustbechecked beforecommencing
work. Particularattentionis
lo be paidto the cuttingbladeswhich must be
correctlysharpened.
sharpening cuttingtools, and also when cleaningthe cutteror cuttingtool.
-Turn
off the engine and removespark plugconnector when replacingor
4
A
Caution:
,, Kickback
Diagrammatic
i
Diagrammatic
flgure
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Neverstraighten or weld damaged cutting tools.
-Operate the Brushcutter/Grass trimmer withas little noiseandcontamination
-Clean the Brushcutler/Grass trimmer at regularintervalsand check that all
-Never serviceor store the Brush cutter/Grasstrimmer inthe vicinity of
-Always store the Brush cutter/Grass trimmer Inlocked rooms and with an
as possible. Inparticular check the correctsetting of the carburetor.
screws and nuts are well tightened.
nakedflames.
emptiedfueltank.
Observethe relevantaccident prevention instructionsissued by the relevant
trade associations and by the insurance companies.
Do notperform any modificationsonthe Brushculler/Grass trimmer as this
will endanger your safety.
The performanceof maintenance or repair work by the user is limited
to those
activities
as described Inthe instructionmanual. All otherwork is to be done
by an Authorized Service Agent.
Use only genuine spare partsand
accessories released andsupplied by MAKITA.
Use of non-approvedaccessories and
tools means increased risk of
accidents.
MAKlTA will not accept any liability
for accidents or damagecausedby the
use of non-approvedcutting
tools and fixing devices of cuttingtools, or
accessories.
FirstAid
Incase of accident make sure that a first-aid box is availableinthe vicinityof
the cuttingoperations. Immediatelyreplaceany itemtaken from the first aid
box.
When asking for help, please give thefollowing information:
-Place of accident
-What happened
-Number
of injuredpersons
-Kind of injuries
-Your name
0
EU Conformity Declaration
The undersigned, Yasuhiko Kanzakl, as authorized by MAKITA
INTERNATIONALEUROPELTD., Michigan Drive.Tongwell. Milton
Keynes,BucksMK15
BJD, U.K., declarethatthe MakitaMachines,
Packaging
The MAKITA Brush cuRer/Grasstrimmer will be deliveredin DNO protective
cardboard boxes
to prevent transportdamage. Cardboardis a basic raw
materialand is therefore consequently reusable or suitable for recycling
..
(waste paper recycling).
Type :
5
manufacturedby Robinconforms to the basic safelyand health
requirements
of the applicableEUguidelines:
EU Machineguideline98/37/EG
EU EMCguideline89/336/EWG(modifiedby91/263/EWG,92/31/
EWGand93/68/EWG)
The
most important standards applied to properly meet the
requirementsof the above EUguidelineswere:
EN
11806, ClSPR 12, EN50082-1,DIN VDE0879TI.
MiltonKeynes, 18.9.99
For MAKITA INTERNATIONALEUROPE LTD.
3-
YasuhikoKanzaki
ManagingDirector
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Model
Dimensions : length x widthx height (without cuttingblade) mm
Mass (without plasticguard and cuttingblade) kg
Volume (fueltank) cm3
Volume (oiltank) cm3
Engine displacement cm3
I 24.5
EM4251 EM4250
Loophandle U handle
176Ox6OOx405
1760~330x265
5.2 5.4
500
80
Maximumengine performance kw
min'
Maximumspindle speed (corresponding) min"
Engine
speed at recommended maw. spindlespeed
Maximumfuel co&umption
kslh
Maximumspecific fuel consumption Slkh
0.66 at 7000min
8500
6500
330
408
Idlingspeed min" 3000
Clutchengagementspeed min"
Ignitionsystem type
Carburetor type
Solidstale ignition
3750
WALBRO WYL
mm
Idling mls2
0.7 - 0.8
2.59 4.72
Spark plug type
-~
Idling ' mk2
Racingor W.0.T mls2
Electrode gap
3.26
3.83
7.24 7.56
Vibration per
IS0 7916"
87.7
97.7
Right handle
(Reargrip)
Lefthandle
(Front grip)
87.7
97.7
NGK CMR6A
Racingor W.0.T
m/s* I 6.27 I 4.7
Soundpressure level average
to IS07917''
Soundpower levelaverage
to IS010884')
Fuel
Engine Oil
db(A)
db(A)
Gear ratio
6
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EM4250
Brush Cutter
d
7
-
;B
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
20
21
24
25
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-
DESIGNATION OF PARTS
Fuel Tank
RewindStarter
Air Cleaner
1-0 Switch(onloffl
Spark
Plug
ExhaustMuffler
ClutchCase
RearGrip
Hanger
Handle
ControlLever
ControlCable
Shaft
Protector
Gear CaselHeadCase
HandleHolder
Cutter Blade
NylonCuttingHead
FuelFillerCap
Starter Knob
Exhaust Pipe
Oil Gauge

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CAUTION: Beforedoingany work onthe brushcutter, always stop the engine
and pullthe spark plugconnector
off the spark plug.
Always wear protectivegloves1
CAUTION: Start the brushcutteronly after havingassembled itcompletely.
For machines with U Handle models
-Insert the handle bar intothe handle holder, making sure that the boss inthe
-ARer the handle bar is inplace, tightenthe four bolls (M5 x 25).
NOTE: Besue the
bolts are tight, but do notovertighten,
handle holder fits intothe hole inthe handle.
-Fit the controlcable (togetherwith the earthcord) to the handlewith
two clips
-Avoid any tendency of the controlcableloloopat the handle bar.
(3).
For machines with Loop Handle
-Fix a barrier to the leH side of the machine together with the handlefor
-Do not adjust positionof the loophandle looclose tothe controlgrip. Keep
operator'sprotection.
not less than 25cmdistance betweenthe handle and the grip.
(adistancecollar
is providedfor this purpose.)
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To meetthe applicablesafety provisions,only the tool/
protector combinations as indicatedinthe tablemust
be used.
Be sureto usegenuineMAKITA cutterblades
or nyloncuttinghead.
-The cutter blade musl be well polished,free of
cracksor breakage.
If the cutter blade hits against a
stone duringoperation, stop the engine and check
the bladeimmediately.
-Polish or replacethe cutter blade
every three hours
of operation.
-If the nyloncutting headhitsagainst a stone during
operation, stopthe engine end check the nylon
cuttingheadimmediately.
CAUTION: The appropriateprotector must always be
installed,for your own safety and inorder
to comply with accident-prevention
regulations.
Operationof the equipment without the
guard being in place
Is not permitted.
For EM4250
-The outsidediameter of the cutter blade must be
230mm (9-1/16'). Never
use any bladessurpassing
230mm (9-1/16") inoutside diameter.
EM4250
Protector for metalblades
Protectorfor metalblades
(Use bladdcord of protectorcutter)for metal
Star Blade
PART
NO. 6208501400 PARTNO. 6258038000 PARTNO. 625805000
EM4251
Protectorfor cord cutter
Nyloncuttinghead Protectorfor cord cutter
(Use of protectorfor metal
bladdcordcutter)
PART
NO. 6218014001 PARTNO. 6218008003 PART NO. 6258047002
For EM4250, EM4251
-Install the clamp (3) on the shaft so that the projection of the clamp (3) is
insertedinto the openingbetweenthe gear case (1) and the shaft
Securethe protector
(4) withthe installatlonbolts M6 x 30 (2) andscrew
M5
x 8 (5).
Use of protectorfor metalblade / cord cutter.
-In use of the metalblade, fastenthe protector (4) to the clamp (3) with two
bolts M6 x 30 (2).
-In use of the cord cutter, insert the protector (2) intothe protector (I), and
fastenthem with two screw (4) and two nuts
(3).
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Turn the machine upside down, and you canreplacethe cutter bladeeasily.
For EM4250, EM4251
-Insert the hexwrench through lhehole in the gear case and rotatethe
-Loosen the nut (1) (lefl-handthread) with the socket wrench and removethe
receiverwasher
(3) untilit is lockedwith the hex wrench.
nut
(l), and clampwasher (2).
For EM4250with the hex wrench still inplace.
-Mount the cutter blade onto the shafl so that the guide of the receiverwasher
(3) fitsinthe arbor hole inthe cutter blade. Installthe clamp washer (2) and
secure the cutter blade with the nut (1).
(Tightening
lorque: 13 - 23 N-m]
NOTE: Always wear gloves when handlingthe cutter blade.
NOTE: The cutterblade-fasteningnut (withspringwasher) is aconsumable
part.
If there appears any wear or deformation onthe springwasher,
replacethe nut.
Mounting of nyloncutting head
For EM4251
-To installthe nyloncutting head (7). removethe tightening nut (8).
-Insert the socket-headwrench (11) throughthe hole inthe gear case and
turn the supportwasher untilit will be lockedwith its notch (12) (or the shaft
will be locked).
clockwise.
-
-Then screw Ihenyloncuttingheadonto the shaft by turning it counter-
-Remove the socket-headwrench.
-Make sure that the bladeis the leftway up.
P
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Rotation
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Inspectionand Refill of EngineOil
-Perform the following procedure, with the engine cooled down.
-While keepingthe enginelevel, removethe oil gauge, and confirmthat the oil isfilledwithin the upper and lower limit marks.
When the oil is inshort insucha way that the oilgauge touches the oilonly by itstip, inparticular with the oilgauge remaining insertedinthe
crankcasewithout screwing-in(Fig.
1). refillnewoil near the port (Fig. 2).
-For reference, the oil refill time isabout 10h (IO times or 10 tanks of oil refill).
-If the oil changes in color or mixes with dirt, replaceit with new one. (For the intervaland method of replacement, refer to P 17)
Recommended oil: SAE IOW-30oil of API Classification, Class SF or higher (4-cycleengine for automobile)
oil volume: Approx. 8Occ
Polnt 1 In Replacement of Oil “011 Gauge”
-Remove dust or dirt near the oilrefillport, and detach the oilgauge.
-Keep the detached
oil gauge free of sand or dust. Otherwise, any sand or dust adhering to the oilgauge may cause irregular oil
circulationor wear onthe engine parts, which will resultintroubles.
-As anexample
to keepthe oil gauge clean, it isrecommendedto insertthe oilgauge on its knob side intothe engine cover, as shown
in Fig3
If oil adheres around
Fg.1
Fig3
I1
, . ./.
Fig.:!
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(1) Keep the engine level,and detachthe oilgauge.
(2) Filloilup to the edgeof the oil refillport. (Refer
lo Fig2of the preceding
page).
Feedoilwith the lubricant refillcontainer.
(3) Securely tightenthe oilgauge. Insufficienttightening may cause oil
leakage.
L
Polnt 2 In Replacement of 011: “If oll spllls out”
-If oilspillsout belweenthe fuel tank andengine mainunit, the oil is sucked intothrough the cooling air intakeport, which will
contaminate the engine.
Be sure lo wipe out spilt oil before start of operation.
REFUELING
HandllngofFuel
It is necessary lo handlefuel with utmostcare. Fuelmay containsubstances similar to solvents. Refuelingmust be performedina sufficien
ventilatedroom or inthe open air. Never inhalefuel vapor, and keep fuel away from you.
if you touchfuelrepeatedly or for a longtime, the
skin becomes dry, which may cause skindiseaseor allergy.
If fuel enters into the eye, cleanthe eye with fresh water. If your eye remains
stillirritated,consult your doctor.
Storage Periodof Fuel
Fuelshould
be usedupwithin a period of 4 weeks, even if it is kept ina specialcontainer inawell-ventilatedshade.
If a specialcontainer is not usedor if the container Is not covered, fuel may deteriorate inone day.
-
.
Fuel
The engine isa four-strokeengine.
Be sure to usean automobile gasoline (regulargasoline or premiumgasoline).
Polnts
for Fuel
-Never useagasolinemixture which contains engine oil. Otherwise, it will cause excessivecarbon accumulationor mechanical troubles.
-Use of deterioratedoilwill cause irregular Startup.
Refueling
WARNING: INFLAMMABLES STRICTLY PROHIBITED
Gasollneused: Automobile gasoline (unleadedgasoline)
-Loosen the tank cap a little
so that there will be no difference Inatmospheric
-Detach the tank cap, and refuel,dischargingair by tiltingthe fueltank
so that
pressure.
the refuelport
will be orientedupward. (Never refillfuelfull to the oil refill
Port.)
entering intothe fueltank.
-Wipe well the periphery of the tank capto prevent foreign matter from
-After refueling, securelytighten the tank cap.
12
Fuel
-
t

Attachment of shoulder strap
-Adjust the strap length so that the culter blade willbe kept parallel with the
ground.
Detachment
For EM4251
-In anemergency,pullthe releasebelt (1) strongly upward, and you can
detach the machine from you.
Be extremely careful lo maintaincontrol of the machine at this time. Do not
allowthe machine to be deflectedtoward you or anyone inthe work vicinity.
WARNING:Failure to maintaincomplete control
of the machineat allcould
resultinserious bodily injuryor DEATH.
For
EM4250
-In case of emergency,removethe emergencydetachment lever (2) by pulling
strongly with a finger. The machinesilldetach from body.
Be extremely careful
to maintaincontrolof the machine at this time. Do not
allowthe machine
to be deflectedtoward you or anyone inthe work vicinity.
WARNING: Failureto maintaincomplete control
of the machineat allcould
resultinserious bodilyInjuryor DEATH.
1
Observethe applicableaccident preventionregulationsl
START I N G
Move at least3m away from the place of refuelling. Place the brushcutter on a cleanpiece of ground takingcarethat the cuaing tool does
not come intocontact with the ground or any other objects.
AColdstart
1) Set this machineon a flat space.
13
Thronle contrqdial

For machinewith U Handle or Loop Handle
1) Set the 1-0 switch (1) to OPERATION.
2) Choke lever
Close the chokelever.
Chokeopening:
- Fullclosing incold or when the engine iscold.
- Fullor half openinginrestartjust after stopof operation.
Primerpump
Continueto push the primer pump untilfuelenters intothe primer pump. (In
general, fuel enters intothe primer pumpby
7 to 10 pushes.)
If the primer pump is pushedexcessively, an excess of gasolinereturnsto
the fueltank.
Recoilstarter
- Pullthe start knob gently untilit ishard to pull (compressionpoint).
- Neverpullthe ropeto the full. Oncethe start knob is pulled, never
Then, returnthe start knob, and pullit strongly.
releaseyour handimmediately. Holdthe start knob untilitreturnsto its
original point.
Choke lever
Whenthe engine starts, open the chokelever.
- Openthe choke lever progressivelywhile checkingthe engine
- Incold or when the engineis cooleddown, never open the choke lever
operation. Besure to openthe choke lever to the full inthe end.
suddenly. Otherwise, the enginemay stop.
Warm-upoperation
Cohtinue warm-upoperationfor
2 to 3 minutes.
9
Note: -If the starter handle is pulledrepeatedly when the choke lever remains at "START"position, the engine will not start easily due to
excessivefuel intake.
electrodesection
of the spark plug.
-In case of excessive fuel intake. removethe spark plug and pullthe starter handle slowly to removeexcess fuel.
Also, dry the
Caution
during Operation:
If the throttlelever is openedfully ina no-loadoperation, the engine rotationis increasedto 10,000min or more. Never operate the engine
a higher speedthan requiredandat anapproximate speed of
6,000 - 8,500min I.
14

B: Startupafterwarm-up operation
1) Pushthe primer pumprepeatedly.
2) Keepthe throttlelever at the Idlingposition.
3) Pull the recoilstarter strongly.
4) If it isdifficult lo start the engine, openthe thronle by about ID.
Pay enenlion to the cutter blade which may rotate.
Attention
In Operation
When the engineisoperatedupside down, white smoke may come out from the muffler.
STOPPING
1) Releasethe throttle lever (6) fully, andwhen the engine rpm haslowered,
2) Beaware that the cutting head may not stop immediatelyand allowit to
set the 1-0 switchto STOP the engine will now stop.
slow down fully.
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ADJUSTMENT OF LOW-SPEED ROTATION (IDLING)
When it Is necessary lo adjust the low-speedrotation(idling),perform it by the carburetoradjusting screw.
CHECKUP OF LOW-SPEED ROTATION
-Set the low-speedrotationto 3000mln-'.
If it is necessary to changethe rotationspeed, regulatethe adjusting screw
(illustratedon the lefl), with Phillipsscrewdriver.
Turnthe adjustingscrew to the lefl. and the engine rotalionwill drop.
readjustit. please contact Authorized ServiceAgent.
-Turn the adjustingscrew
to the right. and the engine rotationwill increase.
-The carburetoris generallyadjusted beforeshipment.
If it is necessary lo
CAUTION: The cutting tools mentionedbelow must only be resharpenedby
an authorizedfacility. Manualresharpeningwill resultinimbal-
ances of the cullingtool causingvibrationsand damage
IO the
equipment.
-cutter blade (star blade
(4 teeth), eddy blade (8 teeth))
An expert resharpeningand balancingservice is provided by Authorized
Service Agents.
NOTE: To increasethe service lifeof the cutter blade (star blade, eddy blade)
it may be turned over once, untilbothcutting edges have become
blunt.
15
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NYLON CUlTING HEAD
The nyloncuttingheadisa dualstringtrimmer head capable of bothautomatic
and bump
i% feed mechanisms.
The nyloncuttingheadwill automaticallyfeed out the proper length
of nylon
cord by the changes incentrifugalforce caused by increasingor decreasing
rpms. However, to cut soft grass more efficiently,bump the nyloncutting
headagainst the ground to feed
out extracordas indicatedunder operation
section.
Operatlon
-Increase the nyloncutting headspeedto approx. 6,000min’.
Low speed (under 4,800min-‘) is not suitable. the nyloncord will not feed out
properlyat
low speed.
-The most effective cutting area is shown by the shadedarea.
If the nyloncord does not feed out automaticallyproceedas follows:
1. Releasethe throttlelever to runthe engine idle andthen squeeze the
throttle leverfully. Repeat this procedure untilthe nyloncord feeds out to
the proper length.
2.
If the nyloncord istoo short to feed out automaticallywith the above
procedure, bumpthe knob
of the nyloncutting headagainst the ground to
feed out the nyloncord.
3. If the nylon cord does not feed out with procedure 2, rewindheplacethe
nyloncord by followingthe proceduresdescribedunder ‘Replacing the
nyloncord“.
Repiaclng the ngon cord
-First, stop the engine.
-Press onthe housinglatchesinwardto lift
off the cover, then removethe
spool.
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Spool 80mm(3- 1 IS”)
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-Hook the center of newnyloncord into the notch inthe center of the spool,
with one end
of the cordextending about 80mm (3-1/8”) morethanthe other.
Then wind bothends firmly around the spool inthe direction
of the head
rotation(left-handdirectionIndicatedby LHand right-handdirectionby RH
onthe side of the
spool).
-Wind all but about 100mm (3-15/16”) of the cords, leavingthe ends tempo-
rarily hookedthrougha notch onthe side
of the spool.
-Mount the spool Inthe housing
so that the grooves and protrusions on the
spool matchup with those inthe housing. Keepthe side with letterson the
spoolvisible on the top. Now, unhookthe ends
of the cordfrom their
temporary positionand feed the cords throughthe eyelets to come out
of the
housing.
16
Most effective cutting area
Fullspeed
Idlespeed
LKnob
Y /
Latches
Press
Press
- For left hand rotati
Spool
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-Align the protrusionon the underside of the cover with the slots of the
eyelets.
Then push cover firmly Onto the housing
to secure it.
eaL Cover
-1 Protrusion
Slot of eyelet
CAUTION: Before doingany work onthe BrushcuHer/Grasstrimmer, always stop the engine and pullthe plug cap
off the spark plug (see
"checkingthe spark plug').
Always wear protectivegloves1
To ensure a longservicelife and to avoid any damage to the equipment, the following servicingoperations should be performedat regular
intervals.
Dallycheckup
and malntenance
-Before operation, check the machinefor
loose screws or mlssing parts. Pay particular attention to the tightnessof the cutter blade or
-Before operation, always check for clogging
of the cooling air passage and the cylinder fins.
-Perform the followingwork dailyafter use:
nylon culling head.
Clean them
if necessary.
- Clean the Brushcutler/Grasstrimmer externally and inspect for damage.
- Clean the air filter. When working under extremely dusty conditions, clean the filter the severall times a day.
- Check the blade or the nyloncuttingheadfor damage and makesure it isfirmly mounted.
Check that there issufficient differencebetweenidlingand engagementspeed
lo ensure that the cutting tool is at a standstill while the
engine is Idling(if necessaryreduce idling speed).
If under idling conditionsthe tool shouldstill continueto run, consult your nearestAuthorized Service Agent.
-Check the functioning
of the 1-0 switch, the lock-offlever, the controllever, and the look button.
REPLACEMENT OF ENGINE OIL
Deterloratedengine oil will shortenthe life of the slidingand rotatingparts lo a great extent. Be sure lo check the periodand quantity of
replacement.
ATTENTION : Ingeneral, the engine mainunit and engine oilstillremainhot just after the engine is stopped. Inreplacement of oil,
confirm that the engine mainunitand engine oibare sufficientlycooled down. Otherwise, there may remaina risk
of
scald.
Interval
of replacement : Initially, every 20 operatinghours, and subsequently every 50 operatinghours
Recommended
011 : SAEIOW-30oil of API ClassificationSF Class or higher (4-strokeengineoilfor automobile)
Inreplacement,performthe following procedure.
1) Confirm that the tank cap is tightened securely.
2) Detachthe oil gauge.
Keepthe oilgauge free from dust or dirt.
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17
I Fyeltank cap I
auge
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3) Placewaste or paper near the oil refill port.
or paper
4) Detachthe oilgauge, anddrainoil, tilting the mainunit towardthe oil refill
PO"..
Drainoil ina container.
5) Keepthe engine level, and feed newoil up to the edge of the oilrefillport.
Inrefill, use a lubricantrefillcontainer.
6) After refill, securelylightenthe oil gauge. Insufficienttighteningof the oil
gaugewill lead
looil leakage.
POINTSON OIL
- Never discard replaced engineoil ingarbage, earthor sewageditch. Disposal of oil is regulatedby law. Indisposal,always follow
- Oil will deteriorate even when it is kept unused. Perform inspectionand replacement at regular intervals(replace with new oil
I
the relevantlaws and regulations. For any pointsremainingunknown, contactAuthorizedSewiceAgent.
every
6 months).
I Set the cut part to this position(toplefl)
CLEANING OF AIR CLEANER
A DANGER:lNFLAMMABLESSTRlCTLYPROHIBITED
Intervalof Cleaning and Inspection:Daily (every 10 operating hours)
-Remove the air cleanercover-fixingbolts.
-Pull the cover lower side and detach the air cleaner cover.
-Turn the choke lever
lo the full closeside, and keep the carburetor off from
dust or dirt.
-Detach the element, wash itwith tepidwater-dilutedneutraldetergent, and
dry
it up. Remountthe element according to the linesindicated InFig.4.
-Use waste andwipe out oil adhering
to the air cleaner cover and plate
breather.
-Immediately after cleaningisfinished, attachthe cleaner cover and tighten it
with fixing bolts. (Inremounting. first place the upper claw, and then the
lower claw.)
Plat
Une(slash-lined)
Fig.4
18

CHECKING THE SPARK PLUG
-Only use the supplied universalwrench lo removeor to install the spark
-The gap belweenthe two electrodes of Ihespark plug should be0.7-0.8mm
(0.028"-0.032"). If the gap is too wide or too narrow, adjustit. If the spark
plugisclogged with carton or fouled, clean itthoroubhlyor replace
it.
plug.
CAUTION: Never touch the spark plugconnector while the engine is running
(danger
of hlgh voltage electric shock).
SUPPLY OF GREASE TO GEAR CASE
-supply grease (Shell Alvania 2 or equivalent)to the gear case throughthe
grease holeevery
30 hours. (GenuineMAKITA greasemay be purchased
from your MAKITAdealer.)
CLEANING OF FUEL FILTER
WARNING: INFLAMMABLESSTRICTLYPROHIBITED
Intervalof Cleaning and Inspection:Monthly (every 50 operatinghours)
Suctionhead In thefueltank
-The fuelfiller (1) of the suction headisused to filler the fuel requiredby the
carburetor.
-A periodicalvisual inspectionof the fuel filler is to be conducted. For that
purposeopenthe tank cap, use a wire hook and pull out the suctionhead
throughthe tank opening. Filtersfound to havehardened, been pollutedor
clogged
up are to be replaced.
exceeded. Itisthereforeimportant to replace the fuel filter at least quarterly
to ensure satisfactory fuel supply to the carburetor.
-Insufficient fuelsupply can resultinthe admissiblemaximumspeed being
REPLACEMENT OF FUEL PIPE
CAUTION: INFLAMMABLESSTRICTLYPROHIBITED
Interval of Cleaningand Inspection:Daily (every 10 operatinghours)
Replacement:Annually (every
,200 operating hours)
Replacethe
fuel plpe everyyear, regardless of operating frequency. Fuel .
leakagemay leadto fire.
If any leakageis detected duringinspection,replacethe oil pipeimmediately.
INSPECTION OF BOLTS, NUTS AND SCREWS
-Retighten loose bolts, nuts, etc.
-Check for fuel andoil leakage.
-Replace damaged parts with new ones for safety operation.
CLEANING OF PARTS
-Keep the engine always clean.
-Keep the cylinder fins
free of dust or dirt. Dust or dirt adhering lo the fins will
cause seizure.
0.7mm-OBmm
(0.028"-0.0327
Fuel pipe
REPLACEMENT OF GASKETS AND PACKINGS
Inreassemblingafter the engine is dismounted, be sure lo replacethe gaskets and packingswith new ones.
Any mainlenance of adjustment work that is not Includedand describedinthis manualisonly
to be performed by Authorized ServiceAgents.
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