Echo SRM - 2100SB User manual

Grass Trimmer/Brush Cutter
Operator'sManual
MODELS, Type 1E SRM - 2100SB
SerialNumber001001&Up
SRM - 2400SB
SerialNumber563000&Up
WARNING DANGER
Readrulesforsafeoperationandinstructionscarefully. ECHOprovidesanOperator'sManualanda
SafetyManual. Bothmustbereadandunderstoodforproperandsafeoperation.
X7702270600 X770000040
11/99
WARNING
The engine exhaust from this
product contains chemicals known
to the State of California to cause
cancer, birth defects or other
reproductive harm.

2
INTRODUCTION
Welcome to the ECHO family. This ECHO product was designed and manufactured to provide long life and on-the-job-
dependability. Read and understand this manual and the SAFETY MANUAL you found in the same package. You will
find both easy to use and full of helpful operating tips and SAFETY messages.
WARNING DANGER
Read rules for safe operation and instructions carefully. ECHO provides an Operator's Manual and a Safety Manual.
Both must be read and understood for proper and safe operation.
THE OPERATOR'SMANUAL –
contains specifications and information for operation, starting,
stopping, maintenance, storage and assembly specific to this product.
THE SAFETY MANUAL –
explains possible hazards involved with the use of Grass Trimmers and
Brush Cutters and what measures you should take to insure safe
operation.
Operation.......................................................................... 21
- StartingColdEngine ................................................. 21
- StartingWarmEngine ............................................... 22
- StoppingEngine........................................................ 23
Maintenance ..................................................................... 23
- SkillLevels................................................................ 23
- Maintenance Intervals .............................................. 24
- Air Filter ................................................................... 25
- Fuel Filter ................................................................. 25
- SparkPlug................................................................. 26
- CoolingSystemCleaning .......................................... 26
- Exhaust System ........................................................ 27
- Carburetor Adjustment SRM-2100SB ..................... 28
- Carburetor Adjustment SRM-2400SB ..................... 29
- Lubrication................................................................ 29
- Nylon Line Replacement .......................................... 30
- Sharpening Metal Blades .......................................... 32
Troubleshooting................................................................ 33
Storage .............................................................................. 34
ServicingInformation........................................................ 36
- Parts.......................................................................... 36
- Service ....................................................................... 36
- ECHO Consumer Product Support.......................... 36
- Warranty Card .......................................................... 36
- Additional or Replacement Manuals ........................ 36
- Manual Ordering Instructions .................................. 36
Specifications, descriptions and illustrative material in this
literature are as accurate as known at the time of
publication, but are subject to change without notice.
Illustrations may include optional equipment and
accessories, and may not include all standard equipment.
TABLE OF CONTENTS
Introduction ........................................................................ 2
- The Operator's Manual .............................................. 2
- The Safety manual ...................................................... 2
Manual Safety Symbols & Important Information ............ 3
Safety.................................................................................. 3
- General Description.................................................... 3
- Decals ......................................................................... 4
- International Symbols................................................. 5
- Equipment .................................................................. 5
- Fuel ............................................................................. 6
- Personal Condition & Safety Equipment ................... 6
- Safe Operation ............................................................ 8
- ExtendedOperation/ExtremeConditions ................... 9
Description ....................................................................... 10
- Contents ................................................................... 10
- Blade Terms & Definitions....................................... 10
- Emission Control ...................................................... 11
Specifications.................................................................... 13
Assembly.......................................................................... 14
- ECHO Approved Optional Attachments ................ 14
- Power Head Shaft / Lower Shaft Assembly ............. 15
- PlasticShield Installation.......................................... 15
- Nylon Head Installation ........................................... 16
- Front Handle Installation.......................................... 16
Pre-Operation ................................................................... 17
- Operation with Blades.............................................. 17
- Fuel ........................................................................... 19
- Equipment Check ..................................................... 20
- Determine Operation Area ....................................... 20
CopyRight©1999ByEcho,Incorporated
All Rights Reserved.

G RASS T RIMMER /B RUSH C UTTER
O PERATOR ' S M ANUAL
3
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.
The circle with the slash symbol means whatever is shown
within the circle is prohibited.
COUPLER
MANUAL SAFETY SYMBOLS AND IMPORTANT INFORMATION
IMPORTANT Theenclosedmessage
provides information necessary for the
protection of the unit.
NOTE Thisenclosedmessageprovidestipsfor
use, care and maintenance of the unit.
Throughout this manual and on the product itself, you will find
safety alerts and helpful, information messages preceded by
symbols or key words. The following is an explanation of those
symbols and key words and what they mean to you.
UPPER DRIVE
SHAFT
SAFETY
GENERALDESCRIPTION
IMPORTANT
See Description and Specification sections for full description and illustration of model variation in power head,
handle type, harness and debris shield/cutter head.
POWERHEAD
(W/DECALS)
FRONT
HANDLE
STOP
SWITCH
LOWERDRIVE
SHAFT
(W/DECALS)
DEBRISSHIELD
(W/DECALS)
CUTTINGATTACHMENT
(NYLONLINEHEADSHOWN)
THROTTLE
TRIGGER

4
Shaft Decal
WARNING DANGER
• This unit can be dangerous and cause serious injury if improperly
used. To reduce injury risk to operator, helpers and bystanders,
read and understand the Operator's and Safety manuals.
• Blindness can occur from objects that are thrown or ricocheted even
with shield in place. Operators, helpers and bystanders must wear
ANSI Z87.1 approved eye protection.
• Always wear hearing protection when operating unit.
• Prevent accidental contact with unit and any cutting attachment.
Maintaina15M(50ft.)radius,DANGERZONEsurroundingthe
operator. ONLY the operator, dressed in proper protective clothing
shouldbeintheDANGERZONE.
• BewareofKICKOUT(bladethrust)whenusingblades. Special
precautions are necessary for blade operation, see your Operator's
and Safety Manuals. ONLY install ECHO approved blades on
Brush Cutters (SRM) models equipped with proper blade shield,
U-handles, harness, blade collar, nut and cotter pin.
• Blade/Cutting attachment does not stop immediately after releasing
throttle. Keep hands and feet clear of blade/cutting attachment
unless engine is shut off and cutting attachment is not moving.
• INSPECTBLADESBEFOREUSE.
• DONOTUSEDAMAGED,CRACKED,BENT,DULLOR
IMPROPERLYSHARPENEDBLADES.
• Do not remove shields, modify the unit or install attachments or
parts not approved by ECHO. Approved attachment information
and replacement Operator's and Safety Manuals are available from
yourECHOdealerorbywriting:ECHO,INCORPORATED,400
OAKWOODRD.,LAKEZURICH,IL 60047.
4
DEBRISSHIELDDECAL
Metal Debris
Shield
DECALS
Locate these safety decals on your unit. The complete unit illustration,
found in the "DESCRIPTION" section, will help you locate them. 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
orderedfromyourECHOdealer. SeePARTSORDERINGinstructions
forspecificinformation.

G RASS T RIMMER /B RUSH C UTTER
O PERATOR ' S M ANUAL
5
Hot
Surface
Carburetor adjustment
- Idle speed
Carburetor adjustment
- High speed mixture
Symbol
description/application
Symbol form/shape
Read and understand
Operator's Manual.
Wear eyes, ears and
head protection
Emergency stop
Fuel and oil mixture
Finger Severing
Carburetor adjustment
- Low speed mixture
Safety/Alert
Wear hand
protection. Use
two handed.
DO NOT smoke
near fuel.
DO NOT allow
flames or sparks
near fuel.
Wear slip resistant
foot wear.
Engine choke
control.
Ignition
ON/OFF
Primer bulb
Symbol
description/application
Symbol form/shape
Symbol
description/application
Symbol form/shape
Symbol
description/application
Symbol form/shape
INTERNATIONAL SYMBOLS
EQUIPMENT
Before operation a complete check of the unit must be performed;
• 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 issecurely
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 handle and shoulder strap/or shoulder/waist harness
are adjusted for safe, comfortable operation. See Assembly Section
for proper adjustment.

6
FUEL
WARNING DANGER
FuelisVERYflammable.Useextremecarewhenmixing,storingor
handling or serious personal injury may result.
• Use an approved fuel container.
• DONOTsmokenearfuel.
• DONOTallowflamesorsparksnearfuel.
• Fuel tanks/cans may be under pressure. Always loosen fuel caps
slowly allowing pressure to equalize.
• NEVERrefuelaunitwhen theengineisHOT!
• NEVERrefuel aunitwiththeengine running.
• DONOTfill fueltanksindoors. ALWAYSfillfuel tanksoutdoors
over bare ground.
• Securely tighten fuel cap after refueling.
• Inspect for fuel leakage. If fuel leakage is found, do not start or
operate unit until leakage is repaired.
After Refueling;
• Wipe any spilled fuel from the unit.
• Move at least 3 M (10 ft.) from refueling location before starting.
After Use;
• DO NOT store a unit with fuel in its tank. Leaks can occur. Return
unused fuel to an approved fuel storage container.
3M (10 ft.)
PERSONAL CONDITION &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.
Physical Condition --
Your judgment and physical dexterity may not be good:
- if you are tired or sick,
-ifyou are takingmedication,
- if you have taken alcohol or drugs.
Operate unit only if you are physically and mentally well.

G RASS T RIMMER /B RUSH C UTTER
O PERATOR ' S M ANUAL
7
Eye Protection --
Wear eye protection that meets ANSI Z87.1 or CE requirements
whenever you operate the trimmer.
Hand Protection --
Wear no-slip, heavy duty work gloves to improve your grip on the
Brush Cutter 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,SCARVES,JEWELRY.
Wear sturdy work shoes with non-skid 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.

8
15M
(50 ft.)
SAFE OPERATION
Determine Operation Area
- Provide all operators of this equipment with the operator's manual and
instructions for safe operation.
- Review the area to be trimmed. Look for hazards that could
contribute to unsafe conditions.
- Spectators and fellow workers must be warned, and children and
animalspreventedfromcomingnearerthan15M(50ft.)while
thetrimmeris inuse.
Operation
UseProperClothing&Equipment
- Before starting the unit, equip yourself and any other personworking
within the 15M (50 ft.) Safety Zone with the required Protective
Equipment and clothing.
AvoidHotSurfaces
- During operation, the complete unit, especially the drive shaft
housing and the bearing housing may become very hot, too hot to
touch. Avoid contact during and immediately after operation.
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.

G RASS T RIMMER /B RUSH C UTTER
O PERATOR ' S M ANUAL
9
EXTENDED OPERATION/EXTREME CONDITIONS
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 sensations followed by loss of color and
numbness in the fingers. The following precautions are strongly
recommendedbecausethe minimumexposure whichmighttrigger the
ailmentisunknown.
• 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 trimmer 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.
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).AnextremeRSIconditionisCarpalTunnelSyndrome
(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.

10
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
MODELS
SRM-2400SBSRM-2100SB
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
Ö
DESCRIPTION
The ECHO product you purchased has been factory pre-assembled for your convenience. Due to packaging restrictions,
shield installation and other assembly may be 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.
Contents List
Items
1 - Power Head w/Upper Drive Shaft Assembly
1 - Lower Drive Shaft Assembly
1 - Plastic Bag (co-pack)
- 1, Operator's Manual
- 1, Safety Manual
- 1, Warranty Registration Card
- 1, Limited Warranty Statement
- 1, Plastic shield
- 1, Tool Bag
--1, 8 mm x 10 mm wrench
--1, scrench
--1, locking tool
- 1, Nylon Trimmer Head
- 1, Safety Glasses
- 1, 2-Stroke Oil Sample, 2.6 oz.
- 1, Front Handle (L.H.) Assembly
-- 1, Plastic Bag
---1, shield plate
--- 3, 5 mm x 15 mm screws (shield mounting)
CONTENTS
BLADE TERMS &DEFINITIONS
BladeConvertible
Models(SRM-2100SB, SRM-2400SB)can beconvertedtoutilizeblades. Plastic/nylonbladesrequire a,"Blade Conver-
sion Kit", which includes a shoulder harness, and steel shield with necessary attaching hardware. Steel/metal blades also
require the, "Blade Conversion Kit", plus a "U-Handle Kit" or a Combo Kit.
IMPORTANT This sparkignition system complieswithCanadian ICES-002.

G RASS T RIMMER /B RUSH C UTTER
O PERATOR ' S M ANUAL
11
EMISSION CONTROL
Type 1E Models
12
3
5
6
7
8
9
10
11
12
13
23
4
14 15
16
17
18
19
20
21
22
The emission control system for this engine is EM
(EngineModification).
EmissionControlLabellocatedonEngine
(EXAMPLEONLY,informationonlabelvariesby
FAMILY).
IMPORTANTENGINEINFORMATION
ENGINE FAMILY: YEHXS.0254CB
DISPLACEMENT: 25.4 CC
THIS ENGINE MEETS U.S. EPA PH1 EMISSION
REGULATIONS FOR SMALL NON ROAD ENGINES.
REFER TO OWNER'S MANUAL FOR MAINTENANCE
SPECIFICATIONS AND ADJUSTMENTS.

12
1. OPERATOR'SMANUAL- Includedinplastic bag(co-pack).Read beforeoperationand keepina safeplacefor future
reference, i.e., operation, maintenance, storage and specifications.
2. SAFETYMANUAL- Included inplastic bag (co-pack).Readbefore operationtolearn proper,safeoperating techniques.
Keep in a safe place for future reference.
3. POWERHEAD-IncludestheEngine,Clutch,FuelSystem,IgnitionSystemandRecoilStarter.
4. GRIP-Rear(righthand)handle.
5. STOPSWITCH- "SLIDE SWITCH"mounted on topofthe ThrottleTriggerHousing. Move switch FORWARDtoRUN,
BACKtoSTOP.
6. UPPERDRIVESHAFTASSEMBLY-IncludestheRear(RightHand)GripAssembly,Front(LeftHand)HandleAssem-
bly,UpperFlexibleDriveCable,DriveShaftAssemblyCouplerandPowerHead.
7. FRONTHANDLE- The front (loop) handle must be assembled to the Upper Drive Shaft Assembly (some models) and
must be positioned for proper cutting attitude and operator comfort.
8. DRIVESHAFTCOUPLER-IncludesLocatorPinandClampingKnob.
9. NYLONCUTTINGATTACHMENT-Containsreplaceablenylontrimminglinethatadvanceswhenthetrimmerheadis
tapped against the ground while the head is turning at normal operating speed.
10. CUT-OFFKNIFE-Automaticallytrimslineto thecorrectlength:5"after headistappedontheground.Iftrimmeris
operated without a cut-off knife the line will become too long, the engine will overheat and engine damage may occur.
11. PLASTICDEBRISSHIELDASSEMBLY-Includedinplasticbag(co-pack).MUSTbeinstalledonunitbeforeuse,see
Assembly Instructions. Shield assembly includes the Cut-Off Knife and Safety Decal. Mounts on the Gear Housing
Assembly just above the cutting attachment. Helps protect the operator by deflecting debris produced during the trimming
operation. This shield must be replaced with the steel shield for blade use.
12. LOWERDRIVESHAFTASSEMBLY-IncludestheDebrisShieldAssembly,GearHousingAssembly,LowerFlexible
Drive Cable, Nylon Cutting Attachment and Safety Decal.
13. THROTTLETRIGGER-Springloadedtoreturntoidlewhenreleased. Duringacceleration,presstriggergraduallyfor
best operating technique.
14. ARM REST - Provides arm rest during operation and protects arm from the hot engine.
15. SPARKPLUG-Providessparktoignitefuelmixture.
16. MUFFLER/SPARKARRESTOR-Themufflercontrolstheexhaustnoisewhilethesparkarrestorpreventshot,glowing
particles of carbon from leaving the muffler where they could possibly start a fire.
17. FUELTANK-Containsfuelandfuelfilter.
18. RECOILSTARTERHANDLE-Pullrecoilstarterhandleslowlyuntilstarterengages,thenquicklyandfirmly. When
engine starts, return handle slowly. DO NOT let handle snap back or damage to unit will occur.
19. FUELTANKCAP-Coversandsealsfueltankopening.
20. PRIMERBULB-Pumpingprimerbulbbefore startingengine drawsfreshfuelfromthefueltank primingthe carburetorfor
starting. Pump the bulb 10 times until fuel is visible in clear fuel return line.
21. AIRCLEANER-Containsreplaceablefilterelement.
22. CHOKE - The choke control lever is located on the top of the air filter case. Move lever to "COLD START" to close choke
for cold starting. Move lever to the "RUN" position to open choke.
23. SAFETYVIDEO-(Notincludedwithunit)P/N99922202540Englishversiononlyisavailableatacostof$5.00fromECHO,
INC. or any authorized ECHO dealer. The video overviews safety precautions and proper operating techniques and is
supplemental to the Safety Manual. Read and understand the Safety Manual for complete information on safe operation.

G RASS T RIMMER /B RUSH C UTTER
O PERATOR ' S M ANUAL
13
SPECIFICATIONS
* Install and use U-Handle when operating any model with blade.
**The RPM range shown applies for all attachments. Refer to your attachment Operator's Manual "Specifications"
section for proper RPM specifications.
MODEL SRM-2100SB SRM-2400SB
Shaft Length 1500 mm (59 in.)
Unit Width 330 mm (13.0 in.)
Unit Height 300 mm (11.8 in.) 360 mm (12.4 in.)
Weight (dry) w/cutting
attachment 5.4 kg (11.9 lb.) 5.6 kg (12.4 lb.)
Engine Type Air cooled, two-stroke, single cylinder gasoline engine
Bore 32.2 mm (1.27 in.) 34.0 mm (1.34 in.)
Stroke 26.0 mm (1.04 in.)
Displacement 21.2 cc (1.29 cu. in.) 23.6 cc (1.44 cu. in.)
Exhaust System Spark Arrestor Muffler
Carburetor Zama Diaphragm model C1U w/purge Walbro Diaphragm model WYJ w/purge
Ignition System CDI(capacitor discharge ignition)
Spark Plug NGK BPMR-7A Gap 0.65 mm (0.026 in.) NGK BPMR-7A Gap 0.65 mm (0.026 in.)
Fuel Mixed (Gasoline and Two-stroke Oil)
Fuel/Oil Ratio 50:1 ECHO High Performance, 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 50:1 ECHO High Performance, two-stroke air cooled engine oil
Fuel Tank Capacity 0.4 lit. (14.0 US fl. oz.)
Starter System Automatic Recoil Starter
Clutch CentrifugalType
Drive Shaft (upper & lower) 1/4 in. Flex Shaft
Rotating Direction Counter clockwise viewed from top
Cutting Attachment Nylon line head (2-line) with .095 in. Cross FireTM line capacity 13 m (40 ft.)
Handles* Front - Loop, Rear - Grip, when operating with standard line head
Shoulder Harness Optional
Idle Speed (RPM) 2700 - 3300
Wide Open Throttle
Speed (**RPM) 8300 - 9500

14
ASSEMBLY
ECHO APPROVED OPTIONAL ATTACHMENTS
WARNING DANGER
Use only ECHO approved attachments for these models. Serious injury may result from the use of non approved
attachment combinations. Read and comply with all safety instructions listed in this manual and attachment manual.
ECHO, INC. will not be responsible for the failure of cutting devices, attachments or accessories which have not been
tested and approved by ECHO for use with these units.
Model SRM-2100SB SRM-2400SB
SRM Edger Attachment #99944200470 √√
SRM Cultivator Attachment #99944200510 √√
SRM Trimmer Attachment #99944200540 √√
SRM Hedge Clipper Attachment
#99944200480 √
SRM Power PrunerTM Attachment
#99944200530 √√
ProSweepTM Attachment #99944200550 √
ProThatchTM Attachment #99944200560 √

G RASS T RIMMER /B RUSH C UTTER
O PERATOR ' S M ANUAL
15
POWER HEAD SHAFT/LOWER SHAFT ASSEMBLY
Tools Required: None
Parts Required: Power Head Shaft, LowerShaftAssembly
1. Set Power Head/Shaft Assembly on a level surface.
2. Loosen clamping knob (A).
3. Pull locator pin (B) and rotate counter clockwise 1/4 turn to lock
out position.
4. Carefully fit lower drive shaft assembly into coupler (C) to decal
assembly line (D), making sure that the inner lower drive shaft
engages into the upper drive shaft mount.
NOTE
Lower bearing housing and head assembly must be in line with the
engine.
5. Rotate locator pin (B) 1/4 turn clockwise to engage lower drive shaft
hole. Insure locator pin is fully engaged by gently twisting lower
drive shaft. Locator pin should snap flush in coupler. Full engage-
ment will prevent further shaft rotation.
6. Secure lower shaft assembly to coupler by tightening clamping
knob (A).
PLASTIC SHIELD INSTALLATION
(ForNylonLineOperation)
Tools Required: Screwdriver.
Parts Required: PlasticShield,ShieldPlate,three(3)5mmx15mm
screws.
NOTE
The plastic shield is for use with the Nylon Line Head only. Install
Metal Shield when using plastic or metal blades.
1. Snap the shield on the bottom of the bearing housing flange.
2. Place shield plate on shield, align holes and install three (3) screws.
A
C
B
D
B
C
A

16
NYLON LINE HEAD INSTALLATION
Tools Required: HeadLockingTool
Parts Required: NylonLineHead.
1. Align locking hole in upper plate (B) with notch in edge of gear
housing and insert head locking tool (A).
2. RemoveplasticsleevefromP.T.O.shaft(C).
3. Be sure upper plate (B) remains on P.T.O. shaft.
4. Thread line head onto P.T.O. shaft by turning it counter clockwise
until head is tight against upper plate (B).
5. Removelockingtool(B).
FRONT HANDLE INSTALLATION
Tools Required: Screwdriver.
Parts Required: Front Handle Assembly
1. Assemble front handle on drive shaft, DO NOT tighten screws yet.
2. Position front handle for comfortable operation and secure screws.
A
B
C

G RASS T RIMMER /B RUSH C UTTER
O PERATOR ' S M ANUAL
17
PRE - OPERATION
OPERATION WITH BLADES
Preparing the Trimmer/Brush Cutter for Blade Use
WARNING DANGER
Blade use DEMANDS specific Brush Cutter configuration. Operation without specified shield and harness can result
in serious personal injury. Follow installation instructions included in optional kits.
PlasticandNylonBladesRequire"BladeConversionKit,"P/N99922200410
(metal shield [A] and shoulder harness [B]).
Steel/MetalBladesRequire:
SRM-2100SB"CombinationBlade"and"U-HandleKit"P/N99944200451.
SRM-2400SB"CombinationBlade"and"U-HandleKit"P/N99944200521.
WARNING DANGER
The type of Blade used MUST be matched to the type and size of material cut. An improper or dull blade can cause
serious personal injury. Blades MUST be sharp. Dull blades increase the chance of kick out and injury to yourself
and bystanders.
Choosing the Correct Blade
Plastic/Nylon Blades may be used where ever the nylon line head
is used. DO NOT use this blade for heavy weeds or brush!
C
AB

18
8ToothWeed/GrassBladeP/N69600120331isdesignedforgrass,
garden debris and thick weeds. DO NOT use this blade for brush or
heavywoodygrowth,3/4"in.(19mm)diameterorlarger.
Brush/ClearingBlade P/N69500120331 isdesignedforcuttingbrush
and woody growth up to 3" in. (76 mm) diameter.
UseShoulder/WaistHarness P/N99944200200TheShoulder/Waist
Harness when used in a trimming operation with nylon line head
suspends the trimmer from the operator's shoulder and reduces operator
fatigue.
During blade operation, the same fatigue reduction is achieved. Safety
to the operator is also enhanced by preventing blade contact with the
operator's hands and feet by restricting trimmer movement.
NOTE
In case of Emergency, pull up on the Quick Release Collar to
disconnect the trimmer from the harness.

G RASS T RIMMER /B RUSH C UTTER
O PERATOR ' S M ANUAL
19
Handling Fuel --
WARNING DANGER
FuelisVERYflammable.Useextremecarewhenmixing,storingor
handling or serious personal injury may result.
• Use an approved fuel container.
• DONOTsmokenearfuel.
• DONOTallowflamesorsparksnearfuel.
• Fuel tanks/cans may be under pressure. Always loosen fuel caps
slowly allowing pressure to equalize.
• NEVERrefuelaunitwhen theengineisHOT!
• NEVERrefuel aunitwiththeengine running.
• DONOT fillfuel tanksindoors.ALWAYSfillfueltanksout
doors over bare ground.
• Securely tighten fuel cap after refueling.
• Inspect for fuel leakage. If fuel leakage is found, do not start or
operate unit until leakage is repaired.
After Refueling –
• Wipe any spilled fuel from the unit.
• Move at least 3M (10 ft.) from refueling location before starting.
After Use –
• DO NOT store a unit with fuel in its tank. Leaks can occur. Return
unused fuel to an approved fuel storage 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,
air tight container. Store in a well ventilated, unoccupied building, away
from sparks and flames. Do not store fuel longer than 30 days.
FUEL
Fuel Requirements --
Gasoline - Use 89 Octane [ ] gasoline known to be good quality.
Gasolinemaycontainupto 10%Ethanol(grainalcohol)or 15%MTBE
(methyltertiary-butylether). Gasolinecontaining methanol(wood
alcohol) is NOT approved.
TwoStrokeOil-Atwo-strokeengineoilmeeting ISO-L-EGDStandard
(ISO/CD13738),mustbeused.EchobrandPremium50:1oilmeetsthis
standard. Engine problems due to inadequate lubrication caused by
failuretouseanISO-L-EGDapprovedoil,suchasEchoPremium50:1
Two-strokeOil, willvoidthetwo-strokeengine warranty. (Emission
related parts only are covered for two years, regardless of two-stroke
oil used, per the statement listed in the EPA Phase I/California Emission
DefectWarrantyExplanation.)
Mixing-Follow directions on the oil container.
R + M
2
3M (10 ft.)

20
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.
IMPORTANT
Stored two-stroke fuel may separate. ALWAYS shake fuel con-
tainer thoroughly before each use.
EQUIPMENT CHECK
Before operation a complete check of the unit must be performed;
• 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 handle and shoulder strap or shoulder/waist
harness are adjusted for safe, comfortable operation. See Assembly
section for proper adjustment.
SMTWTF S
1234567
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28
29 30 31
DETERMINE OPERATION AREA
• Review the area to be trimmed. Look for hazards that could contrib-
ute to unsafe conditions.
• Spectators and fellow workers must be warned, and children and
animalspreventedfromcomingnearerthan15M (50ft.) whilethe
trimmerisinuse.
15M
(50 ft.)