Grass Trimmer
Operator's Manual
MODELS
GT-251E
WARNING
DANGER
Readrulesforsafeoperationandinstructionscarefully. ECHOprovidesan
Operator'sManualandaSafetyManual. Bothmustbereadandunderstoodfor
properandsafeoperation.
X750007973
11/05
X7502021703
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GRASS TRIMMER
OPERATOR'S MANUAL
3
SAFETY
MANUAL SAFETY SYMBOLS AND IMPORTANT INFORMATION
Throughout this manual and on the product itself, you will find safety
alerts and helpful informational messages preceded by symbols or key
words. The following is an explanation of those symbols and key words
and what they mean to you.
This symbol accompanied by the words
WARNING and DANGER calls attention to an
act or condition that can lead to serious personal
injury to operator and bystanders.
IMPORTANT
provides information necessary for the
protection of the unit.
The enclosed message
The circle with the slash symbol means whatever is
shown within the circle is prohibited.
NOTE This enclosed message provides tips
for use, care and maintenance of the unit.
INTERNATIONAL SYMBOLS
SYMBOL FORM/
SHAPE
SYMBOL
DESCRIPTION/APPLICATION
SYMBOL
DESCRIPTION/APPLICATION
SYMBOL FORM/
SHAPE
SYMBOL
SYMBOL
DESCRIPTION/APPLICATION
SYMBOL FORM/
SHAPE
SYMBOL FORM/
SHAPE
DESCRIPTION/APPLICATION
PRIMER
BULB
Read and understand
Operator's Manual.
FUEL AND OIL
MIXTURE
EMERGENCY STOP
DO NOT EXCEED
10,000 RPM.
IGNITION
ON/OFF
WEAR EYES, EARS
AND HEAD
PROTECTION
FINGER SEVERING
WEAR SLIP
RESISTANT
FOOT WEAR.
CARBURETOR
ADJUSTMENT
- HIGH SPEED
MIXTURE
BEWARE
THROWN,
RICOCHET
OBJECTS
HOT
SURFACE
-
CARBURETOR
ADJUSTMENT
- LOW SPEED
MIXTURE
DO NOT SMOKE
NEAR FUEL.
WEAR HAND AND
FOOT PROTECTION
CARBURETOR
ADJUSTMENT
- IDLE SPEED
CHOKE CONTROL
"RUN"
POSITION
(CHOKE OPEN)
CHOKE CONTROL
"COLD START"
POSITION
DO NOT ALLOW
FLAMES OR
SPARKS NEAR
FUEL.
SAFETY/ALERT
(CHOKE CLOSED)
BEWARE
THROWN,
RICOCHET
OBJECTS
DO NOT USE
BLADES. STRING
LINE ONLY
-
KEEP BYSTANDERS AND HELPERS
AWAY 15 M (50 FT.).
PERSONAL CONDITION AND SAFETY EQUIPMENT
WARNING
DANGER
Trimmer/Brush Cutter users risk injury to themselves and others if the trimmer/brush cutter is used improperly and or
safety precautions are not followed. Proper clothing and safety gear must be worn when operating a trimmer.
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4
Physical Condition
Your judgment and physical dexterity may not be good:
• if you are tired or sick,
• if you are taking medication,
• if you have taken alcohol or drugs.
Operate unit only if you are physically and mentally well.
Eye Protection
Wear eye protection that meets ANSI Z87.1 or CE requirements whenever you operate the unit.
Hand Protection
Wear no-slip, heavy-duty work gloves to improve your grip on the handles. Gloves also reduce the transmission of
machine vibration to your hands.
Hearing Protection
ECHO recommends wearing hearing protection whenever unit is used.
Proper Clothing
Wear snug fitting, durable clothing;
• Pants should have long legs, shirts with long sleeves.
• DONOTWEARSHORTS,
• DONOTWEARTIES,SCARFS,JEWELRY.
Wear protective hair covering to contain long hair.
Wear sturdy work shoes with nonskid soles;
• DONOTWEAROPENTOEDSHOES,
• DONOTOPERATEUNITBAREFOOTED.
Hot Humid Weather
Heavy protective clothing can increase operator fatigue which may lead to heat stroke. Schedule heavy work for early
morning or late afternoon hours when temperatures are cooler.
Vibration and Cold --
It is believed that a condition called Raynaud’s Phenomenon, which affects the fingers of certain individuals, may be
brought about by exposure to vibration and cold. Exposure to vibration and cold may cause tingling and burning sensa-
tions, followed by loss of color and numbness in the fingers. The following precautions are strongly recommended,
because the minimum exposure which might trigger the ailment is unknown.
• Keep your body warm, especially the head, neck, feet, ankles,
hands, and wrists.
• Maintain good blood circulation by performing vigorous arm
exercises during frequent work breaks, and also by not smoking.
• Limit the hours of operation. Try to fill each day with jobs where
operating the unit or other hand-held power equipment is not
required.
• If you experience discomfort, redness, and swelling of the fingers
followed by whitening and loss of feeling, consult your physician
before further exposing yourself to cold and vibration.
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GRASS TRIMMER
OPERATOR'S MANUAL
5
Repetitive Stress Injuries --
It is believed that overusing the muscles and tendons of the fingers, hands, arms, and shoulders may cause soreness,
swelling, numbness, weakness, and extreme pain in those areas. Certain repetitive hand activities may put you at a high
risk for developing a Repetitive Stress Injury (RSI). An extreme RSI condition is Carpal Tunnel Syndrome (CTS), which
could occur when your wrist swells and squeezes a vital nerve that runs through the area. Some believe that prolonged
exposure to vibration may contribute to CTS. CTS can cause severe pain for months or even years.
To reduce the risk of RSI/CTS, do the following:
• Avoid using your wrist in a bent, extended, or twisted position.
Instead try to maintain a straight wrist position. Also, when
grasping, use your whole hand, not just the thumb and index finger.
• Take periodic breaks to minimize repetition and rest your hands.
• Reduce the speed and force with which you do the repetitive
movement.
• Do exercises to strengthen the hand and arm muscles.
• Immediately stop using all power equipment and consult a doctor if
you feel tingling, numbness, or pain in the fingers, hands, wrists, or
arms. The sooner RSI/CTS is diagnosed, the more likely permanent
nerve and muscle damage can be prevented.
WARNING
DANGER
Do not operate this product indoors or in inadequately ventilated
areas. Engine exhaust contains poisonous emissions and can
cause serious injury or death.
ReadtheManuals
• Provide all users of this equipment with the Operator’s Manual and
Safety Manual for instructions on Safe Operation.
Clear the Work Area
• Spectators and fellow workers must be warned, and children and
animals prevented from coming nearer than 15 m (50 ft.) while the
unit is in use.
KeepaFirmGrip
• Hold the front and rear handles with both hands, with thumbs and
fingers encircling the handles.
KeepaSolidStance
• Maintain footing and balance at all times. Do not stand on slippery,
uneven or unstable surfaces. Do not work in odd positions or on
ladders. Do not over reach.
AvoidHotSurfaces
• Keep exhaust area clear of flammable debris. Avoid contact during
and immediately after operation.
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6
EQUIPMENT
WARNING
DANGER
Use only ECHO approved attachments. Serious injury may result from the use of a non approved attachment combi-
nation. ECHO, INC. will not be responsible for the failure of cutting devices, attachments or accessories which have
not been tested and approved by ECHO. Read and comply with all safety instructions listed in this manual and safety
manual.
• Check unit for loose/missing nuts, bolts and screws. Tighten and/or replace as needed.
• Inspect fuel lines, tank and area around carburetor for fuel leaks. DO NOT operate unit if leaks are found.
• Inspect shield for damage and ensure that the cut-off knife is securely in place. Replace if either is damaged or
missing.
• Check that the cutting attachment is firmly attached and in safe operating condition.
• Check that front (loop) handle and optional shoulder/waist harness are adjusted for safe, comfortable operation. See
Assembly for proper adjustment.
• Have repairs done only by an authorized ECHO Service Dealer.
EMISSION CONTROL
EPA Phase 2
The emission control system for this engine is EM (Engine Modification).
IMPORTANTENGINEINFORMATION
ENGINE FAMILY: 5EHXS.0254ED DISPLACEMENT: 25.4 CC
EMISSION COMPLIANCE PERIOD : 300 HRS.
THIS ENGINE MEETS U.S. EPA PHASE 2 EMISSION REGULATIONS
FOR SMALL NONROAD ENGINES. REFER TO OWNER'S MANUAL
FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.
EmissionControlLabellocatedonEngine(EXAMPLEONLY,informationonlabelvariesbyFAMILY).
PRODUCT EMISSION DURABILITY
The 300 hour emission durability compliance period is the time span selected by the manufacturer certifying the
engine emissions output meets applicable emissions regulations, provided that approved maintenance procedures
are followed as listed in the Maintenance Section of this manual.
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GRASS TRIMMER
OPERATOR'S MANUAL
7
DESCRIPTION
Locate these safety decals on your unit. Make sure the decals are legible and that you understand and follow the
instructions on them. If a decal cannot be read, a new one can be ordered from your ECHO dealer. See PARTS ORDER-
INGinstructionsforspecificinformation.
18
Hot Decal (near muffler)
P/N 89016006361
17
16
15
11
12
14
6
4
13
5
10
3
2
7
1
8
9
P/N X505001930
Shaft Decal
P/N 89031748731
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8
1. POWER HEAD - Factory Assembled to the Drive Shaft assembly. Includes the Engine, Clutch, Fuel System, Ignition
System and Recoil Starter.
2. GRIP - Rear (right hand) handle.
3. STOP SWITCH - "SLIDE SWITCH" mounted on top of the Throttle Trigger Housing. Move switch FORWARD to
RUN,BACKtoSTOP.
4. FRONT HANDLE - The Front (loop) handle is factory assembled to the Drive Shaft assembly but must be reposi-
tioned for proper cutting attitude and operator comfort.
5. DRIVE SHAFT ASSEMBLY - Factory Assembled to the Power Head. Includes the Rear (right hand) Handle
Assembly, Bearing Housing Assembly, Throttle Trigger, Front (loop, left hand) Handle Assembly, Flexible Drive
Cable and Safety Decals.
6. RAPIDLOADERTM HEAD-Containsreplaceablenylontrimminglines.
7. CUT-OFFKNIFE-Trimslinetothecorrectlength(5in.). Iftrimmerisoperatedwithoutacut-offknifethelinewill
become too long - more than (5 in.) - the operating speed will slow, the engine overheat and performance will suffer.
8. DEBRIS SHIELD ASSEMBLY - Included in plastic bag (co-pack). MUST be installed on unit before use, see
Assembly Instructions. Shield assembly includes the Cut-Off Knife and Safety Decal. Mounts on the Bearing
Housing Assembly just above the cutting attachment. Helps protect the operator by deflecting debris produced
during the trimming operation.
9. THROTTLETRIGGER -Springloadedtoreturntoidlewhenreleased. Duringacceleration, presstriggergradually
for best operating technique.
10. SHOULDER HARNESS - Optional (P/N 99944200201). An adjustable strap that suspends the unit from the operator.
11. SPARKARRESTOR-CATALYTICMUFFLER/MUFFLER-Themufflerorcatalyticmufflercontrolsexhaustnoise
and emission. The spark arrestor screen prevents hot, glowing particles of carbon from leaving the muffler. Keep
exhaust area clear of flammable debris.
12. FUELTANK-Containsfuelandfuelfilter.
13. I-30RECOILSTARTER/HANDLE - i30 spring-assisted recoil starter requires 30% less pulling force than standard
recoil starter. Pull handle slowly until starter engages, then quickly and firmly. When engine starts, return handle
slowly. DO NOT let handle snap back or damage to unit will occur.
14. FUELTANKCAP-Coverandsealsfueltankopening.
15. CHOKE - Located at the rear of the air cleaner housing. Move choke lever to "Cold Start" (
cold starting. Move choke lever to "Run" ( ) position to open choke.
16. AIRCLEANER-Containsreplaceablefilterelement.
) to close choke for
17. PURGE BULB - Pumping purge bulb before starting engine draws fresh fuel from the fuel tank, purging air from the
carburetor. Pump purge bulb until fuel is visible and flows freely in the clear fuel tank return line. Pump purge bulb
an additional 4 or 5 times.
18. SPARKPLUG-Providessparktoignitefuelmixture.
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GRASS TRIMMER
OPERATOR'S MANUAL
9
CONTENTS
The ECHO product you purchased has been partially assembled for your convenience. Due to packaging restrictions,
installation of the plastic debris shield, nylon line head, and positioning of the front handle are necessary.
After opening the carton, check for damage. Immediately notify your retailer or ECHO Dealer of damaged or missing
parts. Use the contents list to check for missing parts.
* Some units may be factory pre-assembled. No assembly tools are needed and the nylon line head, plastic debris shield,
and mounting hardware, shown in the contents list, are pre-assembled to the unit. Only the front handle may need to be
re-positioned for comfortable operation.
____ - TrimmerAssembly:
____
____
-
-
PowerHead
Drive Shaft Assembly
____ - PlasticBag(Co-Pack)
____ - Operator's Manual
____ - Safety Manual
____ - Warranty Card & Limited Warranty
____ - LockingTool,P/N89751801131(headlockingtool)
____ - Safety Glasses
____ - Echo Power Blend TM 2-stroke oil sample
____ - 12pcs. 8in. x.080Pre-cutNylonLine
* __ - RapidLoaderTM 2-lineHead
* __ - Shield Assembly
* __ - Line Head Mounting Hardware:
*
* ___
* ___
* ___
- 3/8-24Locknut
- Small Washer
- Large Washer
* ___ - LockingTool,P/N89751801131(wrenchhandle)
* ___ - Wrench17x14.5,P/NX602000031
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10
ASSEMBLY
Tools Required: LockingTools(2), Wrench17x14.5(9/16in.)
Parts Required: Rapid LoaderTM Head, Large washer, Small washer,
3/8-24Locknut,(2)Pre-cutNylonLine8in.x.080in.,
Plastic Shield Assembly
WARNING
DANGER
Cut-off knife on debris shield has sharp edges. Avoid contact
when installing or removing line head.
B
A
PLASTIC SHIELD INSTALLATION
C
1. Remove cardboard tube.
2. Remove wing nut (C), washer (B), and bolt (A).
3. Snap the shield over the bearing housing.
4. Install bolt (A), washer (B) and wing nut (C).
NYLON LINE HEAD INSTALLATION
B
E
1. Remove plastic threaded shaft sleeve from threaded PTO shaft.
2. Align locating hole in upper plate with hole in bearing housing and
insert5mm(3/16in.)diameterlockingtool(A).
D
C
3. Place large washer (B) then line head (C) on threaded shaft,
followed by small metal washer (D) and locknut (E).
4. Install3/8-24locknutusing14.5mm(9/16in.)wrench. Turnlocknut
clockwise, and tighten securely.
A
IMPORTANT
Remember to remove the locking tool.
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GRASS TRIMMER
OPERATOR'S MANUAL
11
NYLON LINE INSTALLATION
1. Shut engine off. Lay unit on the ground with head assembly up.
2. Remove old nylon line through center recess of head.
3. Thread new lines through outside holes (A) in housing until ends
meet in center of recess.
NOTE
Insert cutting line ends to center of head recess to insure easy
removal of used lines.
A
FRONT (LOOP) HANDLE
NOTE
A
Label shows minimum spacing for front handle location.
NOTE
Front handle is pre-installed. Re-positioning and tightening is all
that is required.
1. Position front handle (A) in comfortable operating position and
tighten wing nut (B). The cutting attachment should be 5-7.5 cm
(2-3 in.) above the ground and as level as possible.
B
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12
OPERATION
Fuel to Oil Mix - 50:1 Ratio
NOTICE:Useofunmixed,improperlymixed,orfuelolderthan90
days, (stale fuel), may cause hard starting, poor performance, or
severe engine damage and void the product warranty. Read and
follow instructions in the Storage section of this manual.
U.S.
METRIC
GAS
GAS
OIL
OIL
cc.
Gallons
Fl. oz.
Liter
FUEL
Fuel Requirements
1
2
5
2.6
5.2
13
4
8
20
80
160
400
Gasoline - Use 89 Octane [R+M/2] (mid grade or higher) gasoline
known to be good quality. Gasoline may contain up to 15% MTBE
(methyl tertiary-butyl ether). Gasohol containing methyl (wood) alcohol
is NOT approved.
Mixing Instructions
1. Fill an approved fuel container with half
of the required amount of gasoline.
2. Add the proper amount of 2-stroke oil
to gasoline.
3. Close container and shake to mix oil
with gasoline.
TwoStrokeOil-Atwo-strokeengineoilmeetingISO-L-EGD(ISO/CD
13738) and J.A.S.O. FC Standards must be used. Echo brand premium
Power Blend TM Universal 2-Stroke Oil meets these standards. Engine
problems due to inadequate lubrication caused by failure to use an
ISO-L-EGDandJ.A.S.O.FCcertifiedoil,suchasEchopremiumPower
Blend TM, will void the two-stroke engine warranty. (Emission related
parts only are covered for two years, regardless of two-stroke oil used,
per the statement listed in the Emission Defect Warranty Explanation.)
4. Add remaining gasoline, close fuel
container,andremix.
IMPORTANT
Spilled fuel is a leading cause of
hydrocarbon emissions. Some states
may require the use of automatic fuel
shut-off containers to reduce fuel
spillage.
IMPORTANT
EchopremiumPowerBlendTM Universal2-StrokeOilmaybemixed
at 50:1 ratio for application in all Echo engines sold in the past
regardless of ratio specified in those manuals.
Handling Fuel
After use
• DO NOT store a unit with fuel in its
tank. Leaks can occur. Return unused
fuel to an approved fuel storage
container.
WARNING
FuelisVERYflammable.Useextremecarewhenmixing,storingor
DANGER
handling or serious personal injury may result.
• Use an approved fuel container.
Storage - Fuel storage laws vary by locality.
Contact your local government for the laws
affecting your area. As a precaution, store
fuel in an approved, airtight container. Store
in a well-ventilated, unoccupied building,
away from sparks and flames.
• DONOTsmokenearfuel.
• DO NOT allow flames or sparks near fuel.
• Fuel tanks/cans may be under pressure. Always loosen fuel caps
slowly allowing pressure to equalize.
• NEVERrefuelaunitwhentheengineisHOTorRUNNING!
• DO NOT fill fuel tanks indoors. ALWAYS fill fuel tanks outdoors
over bare ground.
IMPORTANT
• DO NOT overfill fuel tank. Wipe up spills immediately.
• Securely tighten fuel tank cap and close fuel container after
refueling.
• Inspect for fuel leakage. If fuel leakage is found, do not start or
operate unit until leakage is repaired.
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.
• Move at least 3m (10 ft.) from refueling location before starting
the engine.
IMPORTANT
Stored two-stroke fuel may separate.
ALWAYS shake fuel container
thoroughly before each use.
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GRASS TRIMMER
OPERATOR'S MANUAL
13
STARTING COLD ENGINE
WARNING
DANGER
The attachment will operate immediately when the engine starts and
could result in loss of control and possible serious injury. Keep
movable parts of the attachment off the ground and away from
objects that could become entangled or thrown.
A
1. Stop Switch
Move stop switch button (A) away from the STOP position.
2. Choke
Move choke (B) to “Cold Start” (
) Position.
C
3. Purge Bulb
Pump purge bulb (C) until fuel is visible and flows freely in the clear
fuel tank return line. Pump bulb an additional 4 or 5 times.
B
D
4. Recoil Starter
Lay the unit on a flat area and keep movable attachment parts clear
of all obstacles. Firmly grasp right hand grip with left hand and fully
depress throttle trigger to wide open position. Rapidly pull recoil
starterhandle/rope(D)untilenginefires(ormaximumfive[5]pulls).
5. Choke
After engine fires or five (5) pulls, move choke lever (B) back to
“Run” (
) position. Hold throttle trigger fully depressed and pull
recoil starter handle/rope until engine starts and runs. Allow engine
to run at partial throttle for approximately 10 seconds. Release
throttle trigger and allow unit to warm up at idle for several minutes.
NOTE
If engine does not start with choke in “Run” position after 5 pulls,
repeat instructions.
6. Throttle
After engine warm up, gradually depress throttle trigger to increase
engine RPM to operating speed.
B
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14
STARTING WARM ENGINE
The starting procedure is the same as Cold Start except DO NOT close
the choke, and do not depress throttle trigger to wide open position.
A
WARNING
DANGER
The attachment should not move at idle, otherwise serious personal
injury may result.
NOTE
C
If attachment moves, readjust carburetor according to “Carburetor
Adjustment” instructions in this manual or see your ECHO Dealer.
1. Stop Switch
Move stop switch button (A) away from the STOP position.
2. Purge Bulb
Pump purge bulb (C) until fuel is visible and flows freely in the clear
fuel tank return line. Pump bulb an additional 4 or 5 times.
D
3. Recoil Starter
Lay the unit on a flat area and keep movable attachment parts clear
of all obstacles. Rapidly pull recoil starter handle/rope (D) until
engine fires.
NOTE
If engine does not start after 5 pulls, use Cold Start Procedure.
STOPPING ENGINE
1. Throttle
A
Release throttle and allow engine to return to idle before shutting
off engine.
2. Stop Switch
Move stop switch button (A) backward to STOP position.
WARNING
DANGER
If engine does not stop when stop switch is moved to STOP
position, close choke (B) - COLD START position - to stall engine.
Have your ECHO dealer repair stop switch before using trimmer
again.
B
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GRASS TRIMMER
OPERATOR'S MANUAL
15
MAINTENANCE
Your ECHO trimmer is designed to provide many hours of trouble free service. Regular scheduled maintenance will help
your trimmer achieve that goal. If you are unsure or are not equipped with the necessary tools, you may want to take your
unit to an ECHO Service Dealer for maintenance. To help you decide whether you want to DO-IT-YOURSELF or have the
ECHO Dealer do it, each maintenance task has been graded. If the task is not listed see your Echo dealer for repairs.
SKILL LEVELS
Level1=
Level2=
Level3=
Easy to do. Most required tools come with unit.
Moderate difficulty. Some specialized tools may be required.
Experiencerequired.Specializedtoolsarerequired.ECHOrecommends
that the unit be returned to your ECHO dealer for servicing.
ECHO offers REPOWERTM Maintenance Kits and Parts to make your maintenance job easier. Just below each task
heading are listed the various part numbers required for that task. See your ECHO dealer for these parts.
MAINTENANCE INTERVALS
3
6
REQ'D
SKILL
LEVEL
DAILY OR
BEFORE
USE
YEARLY
600
HOURS
COMPONENT/
SYSTEM
MAINTENANCE
PROCEDURE
EVERY
REFUEL
MONTHS
OR 90
HOURS
MONTHS
OR 270
HOURS
Recommended Echo Dealer Maintenance Procedures
Inspect/Clean/Decarbon
Do-It-Yourself Maintenance Procedures
Cylinder Exhaust Port
3
I / C
R*
I
Air Filter
Inspect/Clean/Replace
Inspect/Clean
1
2
1
1
2
2
2
1
2
1
I / C
I / C
Choke
Fuel Filter
Inspect/Replace
Inspect/Replace
Inspect/Clean
R *
Fuel System, Leaks
Cooling System
Muffler Spark Arrestor
Drive Shaft
I
I / R *
I / C
Inspect/Replace
Grease
I / R *
I (1)
Recoil Starter Rope
Spark Plug
Inspect/Clean
I / C *
I / R *
I / R *
Inspect/Clean
I / C
R *
Screws/Nuts/Bolts
Inspect/Tighten/Replace
MAINTENANCE PROCEDURE LETTER CODES: I = INSPECT, R = REPLACE, C = CLEAN
IMPORTANT NOTE - Time intervals shown are maximum. Actual use and your experience will determine the frequency
of required maintenance.
MAINTENANCE PROCEDURE NOTES:
* All recommendations to replace are based on the finding of damage or wear during inspection.
(1) Apply ECHO® LUBETM yearly.
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16
AIR FILTER
Level1.
Tools required: 25or50mm(1or2in.) Cleaningbrush
Parts required: 90008REPOWERTM AirandFuelFilterKit
1. Close choke (Cold Start Position (
). This prevents dirt from
entering the carburetor throat when the air filter is removed. Brush
accumulated dirt from the air filter area.
2. Remove the air filter cover. Lightly brush debris from filter. If filter
is fuel soaked, deformed, or very dirty, replace it.
3. If filter can be reused, be certain it:
• fits tightly in the air filter cavity.
• is installed with the original side out.
NOTE
Carburetor adjustment may be needed after air filter cleaning/
replacement. See Carburetor Adjustment Section.
FUEL FILTER
Level1.
Tools required: 200-250 mm ( 8 - 10 in.) length of wire with one end
bent into a hook, clean rag, funnel, and an approved
fuel container.
Parts required: 90008REPOWERTM AirandFuelFilterKit
WARNING
DANGER
FuelisVERYflammable.Useextremecarewhenmixing,storingor
handling.
1. Use a clean rag to remove loose dirt from around fuel cap and
empty fuel tank.
2. Use the “fuel line hook” to pull the fuel line and filter from the tank.
3. Remove the filter from the line and install the new filter.
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GRASS TRIMMER
OPERATOR'S MANUAL
17
SPARK PLUG
Level2.
Tools Required: T-Wrench, feeler gauge, soft metal brush
Parts Required: REPOWERTM Tune-UpKit P/N90074C
IMPORTANT
UseonlyNGKBPM-8Ysparkplug(BPMR-8YinCanada)other-
wise severe engine damage may occur.
1. Remove spark plug and check for fouling, worn and rounded
center electrode.
2. Clean the plug or replace with a new one. DO NOT sand blast to
clean. Remaining sand will damage engine.
0.65 mm
(0.026 in.)
3. Adjust spark plug gap by bending outer electrode.
4. Tightensparkplugto150-170kg/cm(130-150in.lb.).
COOLING SYSTEM
Level2.
Tools required: 3&4mmHexWrench, 25or50mm(1or2in.)
cleaning brush
Parts Required: None if you are careful.
IMPORTANT
To maintain proper engine operating temperatures, cooling air
must pass freely through the cylinder fin area. This flow of air
carries combustion heat away from the engine.
Overheating and engine seizure can occur when:
• Air intakes are blocked, preventing cooling air from reaching the
cylinder.
• Dust and grass build up on the outside of the cylinder. This build up
insulates the engine and prevents the heat from leaving.
Removal of cooling passage blockages or cleaning of cooling fins is
considered “Normal Maintenance.” Any failure attributed to lack of
maintenance is not warranted.
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18
A
1. Remove spark plug lead (A).
2. Removeairfiltercover(B).
B
3. Remove one (1) muffler cover screw and muffler cover (C).
4. Remove two (2) screw and engine cover (D).
C
D
IMPORTANT
DO NOT use a metal scraper to remove dirt from the cylinder fins.
5. Use brush to remove dirt from the cylinder fins.
6. Remove grass and leaves from the grid between the recoil starter
and fuel tank.
7. Assemble components in reverse order.
EXHAUST SYSTEM
Spark Arrestor Screen
Level2.
Tools Required: Cross Head Screwdriver, Soft Metal Brush,
4mmHexWrench
Parts Required: Spark Arrestor Screen, Gasket
1. Remove spark plug lead.
C
2. Remove one (1) muffler cover screw and muffler cover.
B
3. Place piston at Top Dead Center (TDC) to prevent carbon/dirt from
entering cylinder.
A
4. Remove spark arrestor screen cover (A), gaskets (B), and screen
(C)frommufflerbody.
5. Clean carbon deposits from muffler components.
6. Replace screen if it is cracked, plugged or has holes burned
through.
7. Assemble components in reverse order.
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GRASS TRIMMER
OPERATOR'S MANUAL
19
Cylinder Exhaust Port
Level3.
IMPORTANT
The cylinder exhaust port must be inspected and cleaned of excess
carbon every 3 months or 90 hours of operation in order to
maintain this engine within the emissions durability period. ECHO
strongly recommends that you return your unit to your ECHO
dealer for this important maintenance service.
CARBURETOR ADJUSTMENT
Engine Break-In
New engines must be operated a minimum duration of two tanks of fuel
break-in before carburetor adjustments can be made. During the break-in
period your engine performance will increase and exhaust emissions will
stabilize. Idle speed can be adjusted as required.
High Altitude Adjustment
High altitude adjustment is not required for proper operation of this
engine.
Level2.
Tools required: Screwdriver,tachometer(EchoP/N99051130017)
Parts required: None.
NOTE
Do not adjust carburetor unless necessary. If you have difficulty,
see your ECHO dealer.
Adjustment Screws
Idle Speed (A)
Controls throttle opening at idle.
B
Low(LO)Speed(B) Controls amount of fuel at low speed and
supplementary fuel for smooth progression from
idle to high speed.
C
High(HI)Speed(C) Controls amount of fuel at full throttle
A
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20
Before Adjustment
Check that:
• Air filter is clean and properly installed.
• Spark arrestor screen and muffler are free of carbon.
• Rapid LoaderTM head with (2) new .080 x 8 in. lines is installed.
Initial Adjustment
1. With engine off, turn HI speed screw (C) counterclockwise to stop.
2. Turn LO speed screw (B) midway between stops.
3. Turn idle screw (A) until tip of screw just touches throttle plate;
then turn three (3) turns clockwise.
Final Adjustment
IMPORTANT
Limiter caps prevent exceeding emission limits and over rich
adjustment, but not over lean adjustment, which can cause engine
failure: Do not exceed recommended HI speed engine R.P.M.
during operation, or for long periods during adjustment.
B
C
1. Start engine, run at idle for one minute.
2. Complete warm up by running at full throttle for 5 minutes, operat-
ing choke twice to clear air from carburetor chambers.
3. Run at idle and accelerate to check for smooth transition from idle
to high speed; if engine hesitates, turn LO speed screw (B)
counterclockwise 1/8th of a turn at a time until acceleration is
smooth.
A
4. Use a tachometer to adjust idle speed to specifications found on
page 24.
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GRASS TRIMMER
OPERATOR'S MANUAL
21
LUBRICATION
Level1.
Tools Required: 8 mm Open-end wrench, screwdriver, clean rag
Parts Required: ECHO® LUBETM 8oz.(P/N91014)orLithiumBase
Grease
1. Remove plastic shield.
B
A
2. Loosen bearing housing locating screw (A), at the top of the
housing, remove mounting screw (B).
3. Pull the flexible drive shaft (C) from the housing, wipe clean and re-
coat with a thin coating 1/2 oz. (15 ml) of grease.
4. Slide the flexible drive shaft back in the drive housing being careful
not to get dirt on the flexible drive shaft.
C
5. Install the bearing housing and shield.
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22
TROUBLESHOOTING
ENGINE PROBLEM TROUBLESHOOTING CHART
Status Cause
Problem
Check
Remedy
Clean or replace
Fuel at
carburetor
No fuel at carburetor Fuel strainer clogged
Fuel line clogged
Clean or replace
Carburetor
See your Echo dealer
Fuel at cylinder
No fuel at cylinder
Carburetor
See your Echo dealer
Muffler wet with fuel Fuel Mixture too rich
Open choke
Engine
cranks -
starts hard/
doesn't
Clean/replace air filter
Adjust carburetor
See your Echo dealer
Spark at end
of plug wire
No spark
No spark
Stop switch off
Electrical problem
Interlock switch
Turn switch to ON
See your Echo dealer
See your Echo dealer
start
Spark at plug
Spark gap incorrect
Covered with carbon
Fouled with fuel
Adjust to .65mm (0.026 in.)
Clean or replace
Clean or replace
Plug defective
Replace plug
Air filter
Air filter dirty
Normal wear
Clean or replace
Fuel filter
Fuel filter dirty
Contaminants/residues in Replace
fuel
Fuel vent
Fuel vent plugged
Plug dirty/worn
Contaminants/residues in Clean or replace
fuel
Engine runs,
but dies or
does not
Spark Plug
Normal wear
Clean and adjust or replace
accelerate
properly
Carburetor
Improper adjustment Vibration
Adjust
Clean
Cooling System
Cooling system
dirty/plugged
Extended operation in
dirty/dusty locations
Spark Arrestor
Screen
Spark arrestor
screen plugged
Normal wear
Replace
Engine does
not
N/A
N/A
Internal engine problem
See your Echo dealer
crank
WARNING
DANGER
Fuel vapors are extremely flammable and may cause fire and/or explosion. Never test for ignition spark by ground-
ing spark plug near cylinder plug hole, otherwise serious personal injury may result.
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GRASS TRIMMER
OPERATOR'S MANUAL
23
STORAGE
Long Term Storage (over 30 days)
WARNING
DANGER
During operation the muffler or catalytic muffler and surrounding cover become hot. Always keep exhaust area clear
of flammable debris during transportation or when storing, otherwise serious property damage or personal injury may
result.
Do not store your unit for a prolonged period of time (30 days or longer) without performing protective storage mainte-
nance which includes the following:
1. Store unit in a dry, dust free place, out of the reach of children.
WARNING
DANGER
Do not store in enclosure where fuel fumes may accumulate or reach an open flame or spark.
2. Place the stop switch in the "OFF" position.
7. Remove the spark plug and pour 7 cc (1/4 oz.) of
fresh, clean, two-stroke engine oil into the cylinder
through the spark plug hole.
3. Remove accumulation of grease, oil, dirt and debris
fromexteriorofunit.
A. Place a clean cloth over the spark plug hole.
4. Perform all periodic lubrication and services that are
required.
B. Pull the recoil starter handle 2-3 times to distribute
the oil inside the engine.
5. Tighten all the screws and nuts.
C. Observe the piston location through the spark plug
hole. Pull the recoil starter handle slowly until the
piston reaches the top of it's travel and leave it
there.
6. Drain the fuel tank completely and pull the recoil
starter handle several times to remove fuel from the
carburetor.
8. Install the spark plug (do not connect spark plug
cable).
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24
SPECIFICATIONS
MODEL ----------------------------------------------------- GT-251E
Length ------------------------------------------------------- 1,510mm(59.4in.)
Width-------------------------------------------------------- 315mm(12.4in.)
Height ------------------------------------------------------- 545mm(21.5in.)
Weight(dry)w/CutterHead (GT251E) ----------------- 4.77kg(10.5lb.)
Engine Type ------------------------------------------------ Air cooled, two-stroke, single cylinder gasoline engine
Bore ---------------------------------------------------------- 34.0mm(1.34in.)
Stroke-------------------------------------------------------- 28.0mm(1.10in.)
Displacement ----------------------------------------------- 25.4cc(1.55cu.in.)
Exhaust(GT-251E) ----------------------------------------- SparkArrestorMuffler
Carburetor -------------------------------------------------- Zama diaphragmw/purge
Ignition System -------------------------------------------- Flywheel magneto, capacitor discharge ignition
SparkPlug -------------------------------------------------- NGKBPMR-8Y 0.65mm(0.026in.)
Fuel ---------------------------------------------------------- Mixed(GasolineandTwo-strokeOil)
Fuel/OilRatio ----------------------------------------------- 50:1 two-stroke air cooled engine oil
Gasoline ----------------------------------------------------- 89 Octane unleaded. DO NOT use fuel containing methyl alcohol,
more than 10% ethyl alcohol or 15% MTBE.
Oil ------------------------------------------------------------ PowerBlendTM PremiumUniversal2-StrokeOil
Fuel Tank Capacity ---------------------------------------- 0.40lit.(13.5USfl.oz.)
RecoilStarterSystem -------------------------------------- i-30 Automatic Recoil Starter
Clutch ------------------------------------------------------- CentrifugalType
DriveShaft -------------------------------------------------- 6.35mm(1/4in.)FlexShaft
RotatingDirection ----------------------------------------- Clockwiseviewedfromtop
Cutter Head ------------------------------------------------- Rapid LoaderTM 2-line Head with .080 in. (12 pieces)
Handle ------------------------------------------------------- Left-D-Loop,Right-Grip
Shoulder Harness ------------------------------------------ Optional99944200201
IdleSpeed(RPM) ------------------------------------------ 2,500-3,000
Wide Open Throttle Speed with
TrimmerHead(RPM) -------------------------------------- 7,300-9,300
IMPORTANT
This spark ignition system complies with Canadian ICES-002
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GRASS TRIMMER
OPERATOR'S MANUAL
25
NOTES
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26
NOTES
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GRASS TRIMMER
OPERATOR'S MANUAL
27
NOTES
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SERVICING INFORMATION
PARTS/SERIAL NUMBER
GenuineECHOPartsandECHOREPOWER™PartsandAssembliesfor
your ECHO products are available only from an Authorized ECHO
Dealer. When you do need to buy parts always have the Model
Number and Serial Number of the unit with you. You can find these
numbers on the engine housing. For future reference, write them in the
space provided below.
Model No. _____________ SN. ____________
SERVICE
Service of this product during the warranty period must be performed
by an Authorized ECHO Service Dealer. For the name and address of
the Authorized ECHO Service Dealer nearest you, ask your retailer or
call:1-800-432-ECHO(3246). Dealerinformationisalsoavailableonour
Web Site. When presenting your unit for Warranty service/repairs,
proof of purchase is required.
DEALER?
Call
1-800-432-ECHO
or
ECHO CONSUMER PRODUCT SUPPORT
If you require assistance or have questions concerning the application,
operation or maintenance of this product you may call the ECHO
ConsumerProductSupportDepartmentat1-800-673-1558from8:30am
to 4:30 pm (Central Standard Time) Monday through Friday. Before
calling, please know the model and serial number of your unit to help
your Consumer Product Support Representative.
CONSUMER PRODUCT
SUPPORT
1-800-673-1558
8:30 - 4:30 Mon - Fri C.S.T.
WARRANTY REGISTRATION
You may register your Echo equipment using the warranty registration
direct link between you and ECHO if we find it necessary to contact
you.
ADDITIONAL OR REPLACEMENT MANUALS
Safety Manuals in English/Spanish or English/French are available, free of charge, from your ECHO dealer or at
Operator'sandPartsManualsareavailableby:
• Downloadingfreefromwww.echo-usa.com
• Purchasing from your Echo Dealer.
• Manuals are available by sending a written request stating the model number and serial number of your Echo unit,
part number of the manual, your name and address, and mail to the address below.
Safety Videos are available from your Echo dealer. A $5.00 shipping charge will be required for each video.
ECHO, INCORPORATED
400 OAKWOOD ROAD
LAKE ZURICH, IL 60047-1564
WWW.ECHO-USA.COM
10001001/10999999
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