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