Echo SRM-3800 TYPE1-E User manual

WARNING DANGER
READ INSTRUCTIONS CAREFULLY AND
FOLLOW RULES FOR SAFE OPERATION.
FAILURETO DO SO COULD RESULT IN
SERIOUS INJURY.
847
TRIMMER/
BRUSHCUTTER
SRM-3800
TYPE1-E
898696-43132
X750226-3801
1

- 1 -
INTRODUCTION
The ECHO Trimmer/Brushcutter, model SRM-3800
TYPE1-E is lightweight, high performance gasoline
powered rotary trimmer which is designed for
brushcutting,weedcontrolandgrasstrimminginareas
which are difficult to control by any other means.The
trimmer is equipped with a safety shoulder harness,
and the excellent balance characteristics plus the
availablepower, ensurescomfortableoperation.
RULESFOR SAFEOPERATION ................................................................................................................ 2
NOMENCLATUREOFPARTS..................................................................................................................... 3
TECHNICALDATA ...................................................................................................................................... 3
ASSEMBLING ............................................................................................................................................ 4
OPERATION ............................................................................................................................................... 6
MAINTENANCEANDCARE....................................................................................................................... 16
TROUBLESHOOTING ............................................................................................................................... 19
LONGTERMSTORAGE............................................................................................................................. 20
CONTENTS
This manual provides the information necessary for
assembly,adjustment, operationand maintenanceof
your unit.

- 2 -
SAFETY INSTRUCTIONS
1. Do Not operatethe unitwhen youare
fatigued.
2. Do Not operateif otherpeople oranimals
arein thework area.
3. Do Not operate the unit without the shield
correctly in position.
4. Do Not operatein a confinedarea.Carbon
monoxide exhaust gas is highly poisonous.
5. DoNotoperatetheunitwhile you aresmoking.
6. Always weareyeprotection goggleswhen
operatingthe unit.
7. Alwaysholdtheunitfirmlywithbothhandsand
withfingersandthumbsencircling the handles.
8. Always obeylocal ordinances regulatingthe
use of internal combustion engines in your area.
9. Always use the cutting attachments as
approvedand suppliedby ECHOInc.for your
unit.
10. Always remain alertwhen operating theunit
to avoid possible injury to yourself and other
people.
11. Alwayswearthe shoulder harnesswhen
operatingthe unit.
12. Do not operatethe unitwhile underthe
influencesof drugsor alcohol.
WARNING DANGER
1. Do Not smokewhile handlinggasoline.
2. Do Not refuel a hot engine.Wait unit it cools.
3. Do Not overfillthetank.Spiledfuelmustbewiped
up.
4. Always stopthe engine whenrefueling.
5. Always remove the fuel cap slowly in order to
relieve any pressure build up in the tank.
6. Always restart the engine at least 3 m (10 feet)
awayfrom therefueling posint.
7. Alwaysstoregasolineinanapprovedcontainer.
RULES FOR SAFE OPERATION
ATTENTION
Foryour protection whenoperatingthis unit,comly
with all Safety Rules as listed in the Operator’s
Manual.(Replacementmanuals areavailablefrom
yourECHOdealer.)
1. Do not operate unless the debris shield and
safety harness are in good condition and
properlyinstalled.
2. Donot operateif otherpersons or animals are
in the work area.
3. Donot operatewithouteye protectiongoggles
availablefromyourECHO dealer.
WARNING DANGER
SERIOUS INJURY MAY RESULT FROMTHE
IMPROPER USE OF STEEL BLADES.
COMPLYWITH ALL SAFETY INSTRUCTIONS
LISTED INTHE OPERATOR’S MANUAL AND
SUPPLIEDWITHTHE BLADES.
1.THE ECHO SAWTOOTH BLADE IS
DESIGNEDTO CUT BRUSH AND SMALL
TREES.
2.THE ECHO 8TOOTH ROTARY KNIFE BLADE
IS DESIGNEDTO CUT HEAVYWEEDS AND
GRASS.TO AVOID INJURY DUETO KICK
BACK ORBLADEFRACTURE,DO NOT USE
THIS BLADETO CUT BRUSH ORTREES.
3.ECHO INC.WILL NOT BE RESPONSIBLE
FORTHE FAILURE OF CUTTING DEVICES
WHICH HAVE NOT BEENTESTED AND
APPROVED BY ECHO FOR USEWITHTHIS
UNIT.

- 3 -
SRM-3800TYPE1-E
Dimension L × W × H cm (inch) 181.5 × 72 × 46 (71.5 × 28.4 × 18.1)
Masses kg (lbs) 8.0 (17.6):withoutshoulder harnessand cutterhead
Engine Type Air cooled two stroke single cylinder
Displacement mL(cu.inch) 37.4(2.28)
Maxrevolution r/min 10,000
Carburetor WalbrodiaphragmtypeWT
Ignition Flywheelmagneto : CDI(CapacitorDischarge Ignition)
system
Sparkplug NGK BPM7Aor CHAMPIONCJ-7Y
Starter Recoilstarter
Clutch Automatic centrifugal clutch
Fuel Mixingratio Mixture ofgasoline (Unleaded,89octane minimum)and
specially blended 50 : 1 ECHO two cycle engine oil.
Tank capacity L (FL.OZ.US) 0.95(32.2)
Drive shaft Cutter(Option) Nylon line cutterhead
assembly Cutter Circular saw, 25 cm (10 inch)
Cutter(Option) 8 cutter blade, 20 cm (8 inch)
Gearhousing 60 degree bevelgears,ratio 1:1.33 (Counter-
clockwise)
Lubrication ShellDelpena orgood quality lithiumgrease
Drive shaft High tensile solid steel, 5 bearings
Shield Metal shield mounted on the gear housing for nylon line
andmetal bladeapplications.
NOMENCLATURE OF PARTS
TECHNICAL DATA
Sparkplug
Topguard
Muffler
Chokeknob
Aircleaner
cover Starterhandle
Fuel tank
Gearhousing
Ignition switch
Drive shaft assembly
Shield
Shoulderharness
Technical data subject to change without notice.
Throttletrigger
Grip

- 4 -
ASSEMBLING
DRIVE SHAFT
•Stand engine uprignt on a level floor.
•Loosen bolts at drive shaft end of the engine.
•Fit drive shaft assembly ensuring that the drive
shaft is correctly engaged.
•Tignten bolts to fasten drive shaft assembly.
WARNING DANGER
NEVER START ENGINEWITHOUT
DRIVESHAFT ASSEMBLY INSTALLED.
THIS COULD RESULT IN SERIOUS INJURY.
Remove bolt retainer tube from end of handle
assembling bolt (8 mm).
1. Handle assembling bolt (8 mm)
2. Bolt retainer tube 1
2
Install handle assembling bracket (upper) in handle
assemblingbracket(lower)andfixhandlebytightening
handle assembling bolt (8 mm) lightly.
1. Handle assembling
bracket (upper)
2. Handle assembling
bolt (8 mm)
3. Left handle
4. Handle assembling
bracket (lower)
5. To engine
1
2
3
45
Insert right hand grip assembly into right hand U-
handle and fit it to the slot for rotation prevention of
righthandU-handle.
Fit grip assembling bolt and secure the grip firmly.
1. Right hand grip assembly
2. Slot
3. Right hand U-handle
1
2
3
1. Grip assembling bolt
1
HANDLE
Bolts

- 5 -
To eliminate loosening of throttle wire fix it to shaft
tube (2 places) and to right hand U-handle (1 place)
with wire fixing clips.
1
2
1. Wire fixing clip
2. Throttle wire
1. Right hand
U-handle
2. Wire fixing clip
3. Shaft tube
4. Throttle wire
1
2
34
Adjust each inclination of right and left handles to
adequateposition(easy to operate)andtightenfirmly
handle assembling bolt (8 mm) and 4 right handle
assemblingbolts.
Determine“Easytooperate”positionseeingillustration
below.
1. Adjustment of right handle inclination (left/right)
2. Adjustment of right handle inclination (forward/
backward)
3. Adjustment of left handle inclination (forward/
backward)
4. To engine
1
2
3
4
Loosen4righthandleassemblingboltsandinsertright
handU-handle intoright handleassembling bracket.
(toward direction of arrow )
FixtherighthandU-handlebytightening4right handle
assembling bolts lightly.
1. Right handle assembling bolt
2. Right handle assembling bracket
3. Right hand U-handle
4. To engine 1
2
34

- 6 -
SHIELD
Fit the shield on the gear housing and tighten screws
with washers (Seven points) as shown.
SHOULDER HARNESS
•Fit the shoulder starp to the swivel hook, and
adjustthelengthofstarpandorthelocaionclamps
tomaintain thecutter head parallelto theground.
Shoulderstrap
assembly
Quickrelease
latch
Waist pad
Oil 1
50
Gasoline
GENERAL CHECK
•Eneure that all nuts, screws and bolts installed
areproperlytightened.
FUELSTATEMENT
GASOLINE : Use 89 octane ( ) gasoline or
gasoholknowntobegoodquality.Gasoholmaycontain
maximum 10% ethyl (grain) alcohol or 15% MTBE
(methyltertiary-butylether).Gasoholcontainingmethyl
(wood)alcohol isnotapproved.
R+M
2
OPERATION
2
4
5
673
1
OIL : ECHO brand premium two-stroke 50:1 oil is
reguirred.
Mixoiland gasoline /gasoholaccordingtoinsturctions
on the oil container label.
•Remove the cover.
•Removenut (A)and onewasher fromthrottle
cable.
•Insert throttle cable througn the hole of bracket
asshown.
•Replacewasherandnut(A)fingertignt,andattach
theinner cable toswivel on throttleleverensuring
that the nipple fits into socket provided on one
side of slot.
•Tighten nut (A) to secure in this position.
•Check that throttle operates freely and returns to
idleposition.
•Do not loosen nut (B) unnecessarily, since it has
been located properly at the factory.
•Reinstall air filter and cover.
•Connect stop lead and ground lead by couplers .
Theengineisdeliveredwiththrottlecable(engine side)
separated,assemblethecabletocarburetorasfollows.
THROTTLE CABLE
Nut(B) Nut (A)
Swivel
Stoplead
Ground
lead
MIXING :Follow directions on the oil container.

- 7 -
STARTING COLD ENGINE
•Slide switch to START/RUN position as shown.
•Push purge bulb 3 or 4 times (or until constant
flow of fuel is visible in fuel return line.)
•Pull choke knob up to COLD START (Close)
position.
•Pullrecoil starteruntilthe enginefires.Now, push
choke knob to RUN (open) position, and if
necessary, restart the engine again and allow to
warm up for a few minutes before using.
•Afteridling,graduallyopenthrottleandcutterblade
will start to operate as the engine attains clutch
engagementspeedof 3,500r/min approximately.
NOTE
Recoil starter : Use short pulls - only 1/2 - 2/3 of
starter rope for starting.Do not let starter rope
snap back in .
Always hold the unit firmly.
STARTINGWARM ENGINE
•When engine is warm, start it by pulling recoil
starterropewith switchpositionedatSTART/RUN.
(Keepchokelever inRUN (open)position)
•Ifengine doesnot start in a fewtries, followsame
procedures as starting a cold.
Throttletrigger Ignition switch
Throttle
control lockout
HOLDTHEUNITFIRMLY.
STOPPING ENGINE
•Releasethrottle triggerand allowto runat an idle
speed.
•Side ignition switch to “STOP” position.
Purgebulb
Fuelreturn line
COLDSTART
(Close)
RUN
(Open)
Chokeknob
US METRIC
GAS OIL GAS OIL
GAL. FL.OZ. L mL
1 2.6 4 80
2 5.1 8 160
5 12.8 20 400
Fuel mix chart
(50: 1) IMPORTANT
Stored fuel ages. Do not mix more fuel than
you expect to use in thirty (30) days, ninety
(90) days when a fuel stabilizer is added.
Stored two-stroke fuel may separata. ALWAYS
shake fuel container thoroughly before each
use.

- 8 -
WARNING DANGER
DO NOT ALLOW EITHER PEOPLE OR
ANIMALS INTOTHEWORK AREA.
ALWAYSWEAR SAFETY GOGGLESWHEN
CUTTING.
DRESS PROPERLY - AVOID LOOSE
CLOTHING.
WHEN GRASS ORWEEDS HAVE CLOGGED
THECUTTER HEAD AFFECTING NORMAL
OPERATION,FIRST,STOPTHE ENGINE AND
THEN REMOVETHE DEBRIS.
OPERATING INSTRUCTIONS (METAL
BLADES and OPTIONAL NYLON LINE)
Yourbrushcutter/trimmer,has beendesignedandcon-
structed to give you years of trouble-free service and
relieve you of the many back-aching tasks normally
associated with grass trimming, weed control and
brushcutting. Nevertheless, in common with all other
poweroperated tools,theOwner and/orOperatorhas
a definite responsibility to maintain the safe working
conditionof theunitas providedby the manufacturer,
and to ensure also the safe operating procedures as
prescribedbycommonsenseandthismanual.Please,
therefore,readandunderstandthe instructionsaslisted
hereunder,andonPage2,inordertopreventaccidents
andpossibleinjury.
WARNING DANGER
••
••
•BEFORE STARTING UPTHE ENGINE,MAKE
SURETHATTHE CUTTER BLADE IS NOT
CONTACTING ANYTHING.
••
••
•WHENTWO OR MORE OPERATORS ARE
WORKINGTOGETHER,ENSURETHAT A
SAFE DISTANCE IS KEPT BETWEEN
THEM.
OPERATINGTHETRIMMER
•Adjust handle to a convenient position for cutting
as instructed on page 5.
•Allowtheengine towarmup at afastidle for afew
minutes.
•Increaseengine speedas necessary.
•When mowingshrubs,weeds, orgrass, swingthe
cutterhead from righttoleft asyoumove forward.
- Avoid striking any obstruction such as rocks,
stonesor treestumpswhich candamagethe
cutter head .
Do not cut into the ground.
- Toavoiddamage totheengine,donotrun the
engineunloaded atfull throttle.
•In the event that the cutter strikes an obstruction
or is otherwise prevented from rotating in normal
operation, the clutch will slip to prevent possible
enginedamage.Inthiscase,stopthe engine, free
the cutter and then start the operation again.

- 9 -
WARNING DANGER
GRASS/WEEDTRIMMERS CAN THROW
GRAVEL,STONE,WOOD CHIPS,GLASS,AND
PLASTIC OR METAL OBJECTS.THE DEBRIS
SHIELD BEHINDTHETRIMMER HEAD STOPS
MUCH OFTHE DEBRIS, BUT CANNOT
PREVENTTHE OPERATOR FROM BEING
STRUCK BY SOME DEBRIS.READTHE RULES
FOR SAFE OPERATION INTHE OPERATOR’S
MANUALTHATYOU RECEIVEDWITHYOUR
ECHOTRIMMER.AISO, FOLLOW AII
INSTRUCTIONS INTHIS INSTRUCTION SHEET.
ECHO 2-LINE MANUALTRIMMER HEAD
(OPTION)
1. ReadtheOperator’sManualcarefully.Bethroughly
familiar with the controls and proper use of the
trimmer.
Know how to stop the unit and disengage the
controls.
2. Neverallowchildren tooperatethe trimmer.
3. Never allow adults to use the trimmer unless they
have received prpper instructions. Be sure the
operator is properly attired and wears the type of
foot, leg, head, eye and ear protection
recommended both in your ECHO Operator's
ManualandbyyourECHOServicing Dealer.
4. Always wear eye protection that conforms to
A.N.S.I.Z87.1-1979.
1.REPLACING LINE
A. Remove spool by turning knob clockwise, “right”,
andseparatingparts.
B. Threada6m(20 feet)lengthof2.4mm(.095inch)
or 2.7 mm (.105 inch) ECHO line through hole in
spool so that ends are the same length.
C. Windbothendsoflinetightlyandevenly clockwise
(see arrows on spool), and wind from side to side
without twisting the lines.
D. Secure ends of line temporarily with about 15 cm
(6inch) extendingout.
NOTE
Keep line tight on spool.
A. Snapspoolinto housingwhilepulling linethrough
eyelets with about 15 cm (6 inch) extending out.
CAUTION
Knob tightens counterclockwise,“left”.
B. Fasten spool to housing with shaft bolt, spring,
andknob.
2.REPLACING SPOOL
1C
1D
HOUSING
BOLT
SPRING
KNOB
1B
2A
15 cm (6 inch)
SPOOL
2B

- 10 -
INSTALLATION OF NYLON LINE HEAD
(OPTION)
Set the nylon line head to the drive shaft and tighten
by turning as shown.
CUTTINGPROCEDURES
SHOULDER HARNESS
•Install the harness over the both shoulders and
adjust shoulder straps so that the quick release
latch rests low on the right hand side.
•Attach the trimmer/brushcutter to the harness by
means of the quick release latch.
•Make some practice sweeps as with a trimmer
andreadjusttheharnessasnecessaryforcomfort
and to maintain the cutter parallel to the ground.
WARNING DANGER
IN CASE OF EMERGENCY,PULLTHE QUICK
RELEASE LATCHTO DISCONNECTTHE
TRIMMER FROMTHE HARNESS.
Lockingtool
OPERATING INSTRUCTIONS nylon line
1. Alwaysuse theend ofthe linefor cutting. Forcing
the cutter head too close to the work will result in
reducedefficiency andbroken line.
2. Maintain the line at the recommended length of
12.5 to 15 cm ( 5 to 6 inch ). A longer line will
reduce engine speed, a shorter line may result in
enginedamage.
3. The trimmer head rotates counterclockwise.
Alwayscutwiththeheadtiltedtotherighttodeflect
debrisaway fromthe operator.
4. Always observe the SAFETY RULES on Page 2
when using the unit.
Upperfixing plate
TIGHTEN
Cutting
head
PULL
Quick
release
latch

- 11 -
TRIMMING
The nylon line will allow you to trim along walls and
fencelines.Always trytotrimfrom righttoleft,walking
behind the unit and parallel to the wall or fence, thus
deflectingdebrisaway fromthe operator.
EDGING
1. The nylon line is intended only to cut grass and
should not be used to cut a normal edging trench
along stone or concrete driveway etc.
2. Tilt the unit vertically as illsutrated and use only
theline tipto removeunwanted growth.
MOWING
•The nylon line will effectively mow large areas of
heavygrassand/or weeds. Usethestandard12.5
- 15 cm ( 5 - 6 inch) of line and operate at full
throttle.
•Whenmowingcultivatedareassuchaslawnshold
the cutter head pararell to the gound to avoid
scalping.
SCALPING
1. The cleaning of weeds and grass right down to
the earth can be accomplished very easily with
the nylon line.
2. Scalpingaround treesandbrushesis particularly
effective,butcareshouldbeexercisednottobruise
the bark of young and sensitive growth.
3. In flower beds, always remenber that the nylon
line will cut in a complete circle to avoid cutting
flowersinstead of weeds.
TREE
SWEEPING
1. Sweeping grass and other debris from a hard
surface can be done very quickly.

- 12 -
WARNING DANGER
1. SERIOUS INJURY MAY RESULT FROMTHE
IMPROPER USE OF STEEL BLADES. READ
AND COMPLYWITH SAFETY
INSTRUCTIONS LISTED INTHIS MANUAL.
2. THE EIGHTTOOTH BLADE IS DESIGNED
SPECIALLYTO CUTWEED AND GRASS.TO
AVOID INJURY DUETOKICKBACKOR
BLADE FRACTURE,DO NOT USETHIS
BLADETO CUT BRUSH ORTREES.
3. ECHO INC.WILL NOT BE RESPONSIBLE
FORTHE FAILURE OF CUTTING DEVICES
WHICH HAVE NOT BEENTESTED AND
APPROVED BY ECHO FOR USEWITHTHIS
UNIT.
6. SHOULDTHE BRUSHCUTTER BE OPER-
ATED FOR AN EXTENDED PERIOD OF HIGH
TEMPERATURES,THE GEAR BOX MAY
BECOMEVERY HOT. IFTOO HOTTOTOUCH,
ALLOWTHE UNITTO COOL DOWN,CHECK
THE LUBRICATION AS PER
‘MAINTENANCE’AND CONTINUETO
OPERATE IF IN ORDER.
7. TO AVOID ENGINE DAMAGE,DO NOT RUN
ON FULLTHROTTLEWITHOUT LOAD.
8. DO NOT OPERATETHE BRUSHCUTTER
WITHOUTTHE HARNESS AND DEBRIS
SHIELD CORRECTLY FITTED.
9. ALWAYS INSPECTTHEWORK AREA AND
REMOVE ANY FOREIGN OBJECTS.
SAFETYPRECAUTIONS
1. ALWAYS USETHECORRECT BLADE FOR
THE JOB AS RECOMMENDED.
2. BE CAREFUL NOTTO HIT ROCKS,STONES,
TREE STUMPS OR ANY FOREIGN OBJECT
WHICH MAY DAMAGETHE BLADE.
3. DO NOT CUT INTOTHE GROUNDTO AVOID
DULLINGTHE BLADE.
4. ALWAYS STOPTHE ENGINE AND EXAMINE
THE BLADE AFTER STRIKING AN
OBSTRUCTION.DO NOT OPERATEWITH A
BLADEWHICH IS BLUNT,BENT,
FRACTURED,OR DISCOLORED DUETO
OVERHEAT.
5. INTHE EVENT,THATTHE BLADE STRIKES
AN OBSTRUCTION,OR IS OTHERWISE
PREVENTED FROM ROTATING IN NORMAL
OPERATION,THECENTRIFUGAL CLUTCH
WILL SLIPTO PREVENT ENGINE DAMAGE.
INTHIS CASE,STOPTHE ENGINE, FREE
AND EXAMINETHE BLADE AND IF IN
GOOD ORDER,RESUME OPERATION.
WARNING DANGER
STEEL BLADE OPERATIONS
Your ECHOTrimmer/Brushcutter isdesigned for fast,
efficient weed and brush control in areas which are
otherwiseinaccessabletopowerequipment.Standard
configuration includes a handle bar and nylon line
headforlighttrimming andweedclearing.Two special
steel blades are available as options and
recommended for use in extended heavy weed and
brushclearing operations: 
1.Blade: weed and grass 8 tooth 20 cm (8 inch)
diameter
2.Blade: brush 80 tooth 25 cm (10 inch) diameter

- 13 -
SHOULDER HARNESS
•Install the harness over the both shoulders and
adjust shoulder straps so that the quick release
latch rests low on the right hand side.
•Attach the trimmer/brushcutter to the harness by
means of the quick release latch.
•Makesome practice sweepsaswith ascytheand
readjusttheharnessasnecessaryforcomfortand
to maintain the cutter parallel to the ground.
WARNING DANGER
IN CASE OF EMERGENCY,PULLTHE QUICK
RELEASE LATCHTO DISCONNECTTHE
TRIMMER FROMTHE HARNESS.
SHIELD
When using a metal blade. Use same as Nylon line.
PULL
Quick
release
latch

- 14 -
INSTALLINGTHE BLADE
1. The installation of the 8 tooth weed/grass blade
(option)andthe80toothbrushisexactlythe same.
Lockingtool
Boxwrench
TIGHTEN
3. Removethenylonlinelinehead,iffitted,byturning
in a clockwise direction.
4. Install the blade ensuring that it is centered
correctly on the fixing plate.
5. Fit the lower fixing plate and tighten the locking
nut using the box wrench supplied in the tool kit.
Gearhousing
Adapter
plate(Upeer)
Locking
tool
Nut
Split pin
Adapter
plate (Lower)
Assemble cutter blade properly
NOTE
•The drive shaft is fitted with left hand threads,
thereforeturn counterclockwiseto tightenas
illustrated.
•Always use a new split pin to secure the
locking nut.
Split pin 2 × 22 mm
PartNo.898502-01130.
Upperfixing plate
Lockingtool
2. Rotate the drive shaft until the holes in the upper
fixing plate and the gear box are aligned. Insert
the locking tool.
Lowerfixing plate
Split pin
6. Fit a new split pin as supplied in the tool kit to
secure the locking nut.
Weed/GrassBlade
(8tooth)
BrushBlade
(80tooth)

- 15 -
HEAVYWEED CUTTING
•Install the 8 tooth 20 cm (8 inch) blade. (option)
•Observingall precautions aslistedin thismanual,
start the engine and using full throttle, swing the
blade in an arc as you move forward slowly.The
cutterrotatescounterclockwise and thedebriswill
bepushedbackwardssotheworkareawillalways
be visible.
SMALLTREES
•The unit will effectively cut small trees up to 7.5
cm (3 inch) diameter using the 80 tooth 25 cm
(10inch) diameter newblade.
•Before attempting to cut, ensure that the falling
tree will fall away from you, and if necessary, tie
arope tothetree andhave an assistantpull itina
safedirection.
•Do not attempt to “plunge cut”, i.e. using the
brushcutter like an axe. It is not necessary and
may cause serious damage to the brushcutter.
•Brace your feet firmly on the ground and cut with
the left hand side of the blade.
CAUTION
1. Always cut on full throttle.
2. Never try cutting with a blunt blade.
BRUSHCUTTING
•Install the 80 tooth blade.
•Proceed exactly as for weed and grass cutting.

- 16 -
MAINTENANCE AND CARE
-ALWAYSKEEPTHE UNITCLEAN-
Air filter
Cover
AIR FILTER
•Cleanbefore usingthe unit.
- Removethecover.(forairfilterandcarburetor)
- Take off the air filter.
- Brush off dust lightly or wash it in suitable
cleaningfluid.
- When you wash it in a solvent, dry it
completely before putting back in place.
FUEL STRAINER
•Checkperiodically.
- Do not allow dust to enter into fuel tank.
- Cloggedstrainerwillcausedifficultyinstarting
engineor abnormalities inengine
performances.
- Pick up fuel strainer through fuel inlet port
with a piece of steel wire or the like.
- When strainer is dirty, wash it in suitable
cleaning fluid or replace it.
Fuelstrainer
MUFFLER AND EXHAUST PORT (SAM)
•Cleanas necessary.
•Carbon deposits in cylinder exhaust port and
mufflerwill reduceengine output.
- Muffler can be removed by taking off muffler
cover.
- Be careful not to scratch cylinder or piston
whencleaning cylinderexhaustport.
Usenon-ferrous plastic orwood.
•Check loose nuts and screws on the muffler part
beforeevery use.
Retighten them firmly if necessary.
Mufflercover
Lid
Screen
CYLINDER FINS
•Checkperiodically.
•Cloggedfins will result in poor engine cooling.
•Remove dirt and dust from between fins to let
cooling air pass easily.

- 17 -
Highsppedneedle (H)
Lowspeedneedle (L)
Idlespeed adjustmentscrew
WARNING DANGER
CUTTINGATTACHMENT MUST NOTTURNOR
MOVEWHEN UNIT IS IDLING.
CARBURETORADJUSTMENT
Every unit is run at the factory and the carburetor is
set in compliance with California Emission Regula-
tions, In addition, the carburetor is equipped with “H”
(HighSpeedNeedle)and“L”(LowSpeedNeedle)nee-
dle adjustment limiters that prevent settings outside
acceptable limits.
1. Before adjusting carburetor clean or replace air
filterand muffler,“Spark Arrestor Screen”.
2. Make sure the cutting attachment such as hedge
clipperbladesorcircularsawareproperlyadjusted.
Trimmer line should be extended to cut-off knife.
3. Start engine and run several minutes to bring to
operating temperature. Flash choke twice during
warm-up to clear any air from the fuel system.
4. Stopengine.Turn“H”speed needleCCW(counter
clockwise) to stop.Turn “L” speed needle midway
betweenfull CW(clockwise) stop andCCW stop.
5. IdleSpeed Adjustment
•Start engine,turn“idle”speed adjustment
screw CW until the saw chain begins to turn,
then turn screw out CCW until attachment
stopsturning.Turnscrewout, CCW, an
addtional1/4 turn.
SPARK PLUG
•Checkperiodically.
•Standard spark plug gap is 0.6 - 0.7 mm
(0.024- 0.028in).
•Replaceifeitherelectrodeiswornoriftheinsulator
is fouled by oil or other deposits.
•TORQUE = 14.2 - 15.2 N⋅⋅
⋅⋅
⋅m (125 - 135 in.lb)
CAUTION
Do not over torque.
0.6 - 0.7mm (.024 - .028 in.)
Gear
housing
Bolt
GEAR HOUSING
•Remove the bolt every 50 hours and check.
•Replenish as necessary, but do not overfill.
- Shell delpena or good quality lithium multi
grease is recommendable.

- 18 -
6. Accelerateto fullthrottlefor 2- 3 secondsto clear
any excess fuel in the engine, then return to idle.
Accelerate engine to full throttle to check for
smoothtransitionfromidletohighspeed. If engine
hesitatesturn“L”needleCCW1/8 turn andrepeat
acceleration. Continue adjustment until smooth
accelerationresults.
7. Check idle speed and reset if necessary as
described in item 5.
EIGHT CUTTER BLADE
•Useonlythebladedesignatedbythemanufacturer
for this model.
•When crack is noticed on the blade, never use it,
but replace with a new one.
•Roundtheteethbottomfor1-2 mm radius inorder
to avoid the crack using a round file.
- Roundedpart isnot tobesharpened.
- Sharpen each cutter equally so as to retain
the balance of the blade.
- Insharpeningtheedgebyuseofagrinder,do
notcool thecutter abruptlyby immersingit in
water.
30°Cutteredge
Notsharpened
2R
2mm Toothbottom
MAGNETO
TheunitisincorporatedwithaCDI(CapactiorDischarge
Ignition) system, which does not require adjustment
of ignition timing and the contact breaker point gap.
Ensurewire connectionsand couplers assembling.
CAUTION
When strarting, idling adjustment speed
should be adjusted not to rotate the cutting
attachment. Correct idle speed is adjusted
2,900 to 3,100 r/min. Or 1/4 turn counter
clockwise from the point the cutting
attachment stops moving.When there is some
trouble with the carburetor,refer to your
distributor or dealer.

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Fuel strainer clogged Clean.
Fuel pipe clogged Clean.
Suction insufficient Make sufficient.
Strainer clogged Clean.
Carburetor out of order Disassemble and check.
C.D.I. module defective Remove and replace.
Ignition coil defective Remove and replace.
Wire connection defective Reconnect.
High-tension cord connection Repair as necessary.
defective
Switch is grounded Switch on.
Insulator cracked Replace plug.
Spark gap incorrect Adjust.
Covered with carbon Clean or replace.
Fouled with fuel Clean or replace.
Starting procedures incorrect Start correctly.
Low and high speed needle Readjust.
setting too lean
Metering lever spring too strong Readjust
Fuel pump diaphram defective Replace.
Fuel passage clogged with dust Disassemble and clean.
Fuel leaking from fixing Retighten all screws.
surfaces of carburetor
Air valve, fuel tank cap Replace or clean.
does not work normally
Fuel pump does not operate Check impulse drilling.
Fuel inlet needle valve Clean.
clogged with dust
Metering lever spring not placed Correct.
in dent of lever This is because fuel mixture
is too rich.
Muffler sticky Start the engine several
with fuel times with choke shutter fully
open and run at fast idle until
engine does not smoke.
Bearing damaged Disassemble and replace.
Piston and/or cylinder seized Disassemble and replace.
Crankshaft worn Disassemble and replace.
Crankshaft contacting Disassemble and replace.
crankcase
TROUBLE SHOOTING
Fuel is not
reaching
carburetor
Starting procedures correct
Accelera-
tion and
low speed
function
defective
No spark at high
tension cord end
No spark at plug
Fuel is not
reaching
cylinder
Fuei is reaching cylinder
There is spark at plug
There is spark at high tension cord end
Fuel does
not keep
running
Carburetor
overflow
Engine does
not crank
Table1
Poorperformance ofthe engineand/or trimmingmechanism cannormallybe preventedbycarefully following
instructions.
Poor performances can easily be corrected even by a beginner.
When the engine does not function properly check the following three (3) points first.
•Isengine compression adequate?
•Is fuel system in good condition and is enough fuel being supplied?
•Is electrical system in good condition and is spark plug operating normally?
When there is serious trouble with the unit, do not try to repair it yourself but have your distributor or dealer do it
for you.For detailed TROUBLE SHOOTING refer to tables 1 and 2.Locate the problem on the following charts
andrepair asnecessary.
Engine cranks
Engine does not start (or, is difficult to start)
There is fuel in the tank
Fuel is reaching carburetor