Page 1
Grass T rimmer/Brush Cutter
Operator's Manual
MODELS, SRM - 3100, 3110 Type 2/2E
SRM - 3100S Type 1/1E
Serial Number 001001 & Up
SRM - 3400 Type 1/1E
Serial Number 001001 - 541792
W ARNING
X7502124702
The engine exhaust from this
product contains chemicals known
to the State of California to cause
cancer, birth defects or other
reproductive harm.
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.
89861155832
03/00
Page 2
2
INTRODUCTION
Welcome to the ECHO family. This ECHO product was designed and manufactured to provide long life and on-the-jobdependability. 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.
W ARNING 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'S MANUAL –
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 make their use
safer.
TABLE OF CONTENTS
Introduction ........................................................................ 2
- The Operator's Manual ........................................... 2
- The Safety manual...................................................2
Manual Safety Symbols and Important Information ......... 3
Safety.................................................................................. 3
- Decals ...................................................................... 3
- International Symbols ............................................. 4
- Equipment ............................................................... 5
- Fuel.......................................................................... 5
- Personal Condition and Safety Equipment ............. 6
- Safe Operation......................................................... 7
- Extended Operation/Extreme Conditions ................ 8
Description ......................................................................... 9
- Contents .................................................................. 9
- Blade Terms and Definitions................................... 9
- Emission Control................................................... 10
Specifications.................................................................... 12
Assembly.......................................................................... 13
- Drive Shaft /Powerhead......................................... 13
- Plastic Shield Installation ...................................... 13
- Nylon Head Installation ........................................ 14
- Blade Installation................................................... 14
- Harness Clamp Installation ................................... 15
- Throttle Linkage and Ignition Leads...................... 16
- Front Handle Installation ...................................... 17
- U-Handle Installation ............................................ 17
Pre-Operation ................................................................... 20
- Operation with Blades .......................................... 20
- Fuel........................................................................ 22
- Equipment Check .................................................. 23
- Determine Operation Area .................................... 24
CopyRight© 1999 By Echo, Incorporated
All Rights Reserved.
Operation.......................................................................... 24
- Starting Cold Engine .............................................. 25
- Starting Warm Engine ............................................ 26
- Stopping Engine .................................................... 26
Maintenance ..................................................................... 27
- Skill Levels ............................................................ 27
- Maintenance Intervals ........................................... 27
- Air Filter................................................................ 28
- Fuel Filter .............................................................. 28
- Spark Plug ............................................................. 29
- Cooling System Cleaning....................................... 29
- Exhaust System ..................................................... 30
- Carburetor Adjustment Emission.......................... 31
- Carburetor Adjustment Non Emission.................. 32
- Lubrication ............................................................ 34
- Nylon Line Replacement....................................... 34
- Sharpening Metal Blades....................................... 37
Troubleshooting................................................................ 38
Storage .............................................................................. 39
Servicing Information........................................................ 40
- Parts ...................................................................... 40
- Service .................................................................. 40
- ECHO Consumer Product Support ...................... 40
- Warranty Card....................................................... 40
- Additional or Replacement Manuals..................... 40
- Manual Ordering Instructions ............................... 40
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.
Page 3
GRASS TRIMMER/BRUSH CUTTER
OPERATOR'S MANUAL
MANUAL SAFETY SYMBOLS AND IMPORTANT INFORMATION
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.
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.
IMPORTANT The enclosed message
provides information necessary for the
protection of the unit.
NOTE This enclosed message provides tips for
use, care and maintenance of the unit.
3
SAFETY
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
ordered from your ECHO dealer. See PARTS ORDERING instructions
for specific information.
DEBRIS SHIELD DECAL
Metal Debris
Shield
Page 4
4
4
Shaft Decal
W ARNING 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.
Maintain a 15M (50 ft.) radius, DANGER ZONE surrounding the
operator. ONLY the operator, dressed in proper protective clothing
should be in the DANGER ZONE.
• Beware of KICKOUT (blade thrust) when using blades. 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, Uhandles, 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.
• INSPECT BLADES BEFORE USE.
• DO NOT USE DAMAGED, CRACKED, BENT, DULL OR
IMPROPERLY SHARPENED BLADES.
• 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
your ECHO dealer or by writing: ECHO, INCORPORATED, 400
OAKWOOD RD., LAKE ZURICH, IL 60047.
INTERNA TIONAL SYMBOLS
Symbol form/shape
Symbol
description/application
"WARNING, SEE
OPERATOR'S
MANUAL
Wear eyes, ears and
head protection
Wear hand and
foot protection
Safety/Alert
Symbol form/shape
Keep bystanders and helpers
away 15 m (50 ft.).
Symbol
description/application
Hot
Surface
Finger Severing
DO NOT allow
flames or sparks
near fuel.
DO NOT smoke
near fuel.
Symbol form/shape
Symbol
description/application
Emergency stop
Carburetor adjustment
- High speed mixture
Carburetor adjustment
- Idle speed
Carburetor adjustment
- Low speed mixture
Symbol form/shape
Symbol
description/application
Fuel and oil mixture
Primer Bulb
Ignition
ON/OFF
Engine choke
control.
Page 5
GRASS TRIMMER/BRUSH CUTTER
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.
OPERATOR'S MANUAL
5
• Check that front loop handle and shoulder strap/ or shoulder/
waist harness are adjusted for safe, comfortable operation. See
Assembly Section for proper adjustment.
• Only use attachments and accessories specified by Echo for this unit.
FUEL
W ARNING DANGER
Fuel is VERY flammable. Use extreme care when mixing, storing or
handling or serious personal injury may result.
• Use an approved fuel container.
• DO NOT smoke near fuel.
• DO NOT allow flames or sparks near fuel.
• Fuel tanks/cans may be under pressure. Always loosen fuel caps
slowly allowing pressure to equalize.
• NEVER refuel a unit when the engine is HOT!
• NEVER refuel a unit with the engine running.
• DO NOT fill fuel tanks indoors. ALWAYS fill fuel tanks outdoors
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.
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. Contact your ECHO dealer for ordering
information.
Page 6
6
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.
PERSONAL CONDITION & SAFETY EQUIPMENT
W ARNING 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.
3M (10 FT.)
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 trimmer.
Hand Protection
Wear no-slip, heavy duty work gloves to improve your grip on the
Trimmer/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.
Page 7
GRASS TRIMMER/BRUSH CUTTER
Proper Clothing
Wear snug fitting, durable clothing;
• Pants should have long legs, shirts with long sleeves.
• DO NOT WEAR SHORTS,
• DO NOT WEAR TIES, SCARVES, JEWELRY.
Wear sturdy work shoes with non-skid soles;
• DO NOT WEAR OPEN TOED SHOES,
• DO NOT OPERATE UNIT BAREFOOTED.
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.
OPERATOR'S MANUAL
7
SAFE OPERATION
Determine Operation Area
• Provide all operators of this equipment with the Operator's Manual
and insturctions for safe operation.
• Do not operate this product indoors or in inadequately ventilated
areas.
• 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
animals prevented from coming nearer than 15M (50 ft.) while the
trimmer is in use.
Operation
Use Proper Clothing & Equipment
• Before starting the unit, equip yourself and any other person working
within the 15M (50 ft.) Safety Zone with the required Protective
Equipment and clothing.
15M
(50 ft.)
Avoid Hot Surfaces
• 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.
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8
Keep A Firm Grip
• Hold the front and rear handles with both hands with thumbs and
fingers firmly encircling the handles
Keep A Solid Stance
• 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.
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
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 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). 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.
Page 9
GRASS TRIMMER/BRUSH CUTTER
OPERATOR'S MANUAL
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
Contents List
9
Items
1 - Power Head
1 - 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, 8mm x 10mm wrench
--1, scrench
--1, locking tool
--1, L-Hex Wrench
- 1, Nylon Trimmer Head
- 1, Safety Glasses
- 1, 2-Stroke Oil Sample, 2.6 oz.
- 1, Shoulder Harness w/hip pad
- 1, Shoulder Harness w/o hip pad
- 1, Front Handle (L.H.) Assembly
- 1, Plastic Bag
--1, shield plate
--3, 5mm x 18mm screws (shield mtg.)
--1, metal shield
--1, bracket
- 1, Plastic Bag
-- 3, 5mm x 15mm screws (shield mount)
-- 2, 5mm x 8mm screws (bracket to shield)
-- 4, 5mm nuts
-- 4, 5mm lockwashers
MODELS
3100S/3400 3110 TYPE 2E
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3100 TYPE 2E
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BLADE
TERMS AND DEFINITIONS
Blade Capable
All Models include the "Blade Conversion Kit", therefore they are capable of using plastic/nylon blades when the steel
shield is installed and the shoulder harness is used. If steel/metal blades are used, the "U-Handle Kit" must be installed.
Dedicated Blade Capable
Model SRM-3110 includes both the "Blade Conversion Kit", and "U-Handle Kit".
Page 10
10
EMISSION CONTROL
The emission control system for this engine is EM (Engine Modification).
Emission Control Label located on Engine
(EXAMPLE ONLY, information on label varies by FAMILY).
19
18
17
20
25
24
23
21
IMPORTANT ENGINE INFORMATION
ENGINE FAMILY: SEH034U824RA
DISPLACEMENT: 30.5 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.
1
2
13
14
15
22
8
9
10
7
12
7
5
6
5
4
11
3
26
3
16
Page 11
GRASS TRIMMER/BRUSH CUTTER
OPERATOR'S MANUAL
1. OPERATOR'S MANUAL - Included in plastic bag (co-pack). Read before operation and keep in a safe place for future reference,
i.e., operation, maintenance, storage and specifications.
2. SAFETY MANUAL - Included in plastic bag (co-pack). Read before operation and keep in a safe place for future reference to
learn proper, safe operating techniques.
3. POWER HEAD - Includes the Engine, Clutch, Fuel System, Ignition System and Recoil Starter.
4. GRIP - Rear (right hand) handle.
5. STOP SWITCH "SLIDE SWITCH" mounted on top of the Throttle Trigger Housing. Move switch FORWARD to RUN, BACK to STOP.
6. FRONT HANDLE - The Front (loop) handle is not factory assembled to the Drive Shaft assembly (some models) and must be
positioned for proper cutting attitude and operator comfort.
7. DRIVE SHAFT ASSEMBLY - Includes the Rear (right hand) Handle assembly, Gear Housing assembly, Front (loop, left hand)
Handle assembly, Flexible Drive Cable (SRM-3100S, 3400 have solid steel drive shaft) and Safety Decal.
8. NYLON CUTTING ATTACHMENT - Contains replaceable nylon trimming line that advances when the trimmer head is tapped
against the ground while the head is turning at normal operating speed.
9. CUT-OFF KNIFE - Automatically trims line to the correct length: 5" after head is tapped on the ground. If trimmer is operated
without a cut-off knife the line will become too long, the engine will overheat and engine damage may occur.
10. PLASTIC 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 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.
11
11. THROTTLE TRIGGER - Spring loaded to return to idle when released. During acceleration, press trigger gradually for best
operating technique.
12. U-HANDLE - Required for metal blade operation.
13. BLADE - Circular blade for grass, weed or brush cutting applications. Harness, metal shield & U-handles required for blade
operation.
14. METAL BLADE SHIELD - Required when unit is equipped with blades. Do not operate unit without shield.
15. SHOULDER HARNESS - An adjustable strap that suspends the unit from the operator. Using the strap reduces operator fatigue.
16. HIP PAD - Used to protect hip/leg and clothing when using U-handle equipped unit.
17. CHOKE - The choke control is located on the top of the air filter case. Pull choke knob up to close the choke for cold starting.
Push knob down for the "RUN" position.
18. SPARK PLUG - Provides spark to ignite fuel mixture.
19. ARM REST - Provides arm rest during operation and protects arm from the hot engine.
20. MUFFLER/SPARK ARRESTER - The muffler controls the exhaust noise while the spark arrester prevents hot, glowing particles
of carbon from leaving the muffler where they could possibly start a fire.
21. FUEL TANK - Contains fuel and fuel filter.
22. RECOIL STARTER HANDLE - 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.
23. FUEL TANK CAP - Covers and seals fuel tank opening.
24. PRIMER BULB - Pumping primer bulb before starting engine draws fresh fuel from the fuel tank priming the carburetor for
starting. Pump the bulb 10 times until fuel is visible in clear fuel return line.
25. AIR CLEANER - Contains replaceable filter element.
26. SAFETY VIDEO - (Not included with unit) P/N 99922202540 English version only is available at a cost of $5.00 from ECHO,
INC. or any authorized ECHO dealer. The video overviews safety precautions and proper operating techniques and is supplemen-
tal to the Safety Manual. Read and understand the Safety Manual for complete information on safe operation.
Page 12
12
SPECIFICATIONS
MOD EL SR M-3100 2/2E SR M-3100S 1/1E SR M -3110 2/2E SR M-3400 1/1E
Length 1500 mm (59.0 in.) 1500 m m (59.0 in.) 1500 mm (59.1 in.) 1530 m m (60.2 in.)
Width 330 mm (13.0 in.) 330 mm (13.0 in.) 600 mm (23.6 in.) 330 m m (13.0 in.)
Height 260 m m (14.2 in.) 260 mm (14.2 in.) 420 mm (16.5 in.) 260 m m (10.2 in.)
W e i g ht (d ry) w /C utte r
Head
Engine Type
Bore 36.0 mm (1.42 in.) 36.0 mm (1.42 in.) 36.0 mm (1.42 in.) 38.0 mm (1.50 in.)
Stroke 30.0mm (1.18 in.) 30.0mm (1.18 in.) 30.0mm (1.18 in.) 30.0mm (1.18 in.)
Displacement 30.5 cc (1.89 cu. in.) 30.5 cc (1.89 cu. in.) 30.5 cc (1.89 cu. in.) 34.0 cc (2.08 cu. in.)
E xhaus t Spark Arrestor Muffler
Carburetor Walbro diaphragm model WT w/purge
Ignition System Flywheel magneto, capacitor discharge
Spark Plug NGK B PM -7A, (Gap 0.65 mm (0.026 in.)
Fuel Mixed (Gasoline and Two-stroke Oil)
Fuel/Oil Ratio 50:1 EC HO High Performance, two-stroke air cooled engine oil
Gasoline
Oil 50:1 EC HO High Performance, two-stroke air cooled engine oil
Fuel Tank Capacity
Starter System Automatic Recoil Starter
6.3 kg (13.9 lb.) 7.0 kg (15.4 lb.) 6.8 kg (14.9 lb.) 7.1 kg (15.7 lb.)
Air cooled, two-stroke, single cylinder gasoline engine
89 Octane unleaded. DO NOT use fuel containing methyl alcohol, more than
10% ethyl alcohol or 15% MTBE.
0.8 lit. (27.1 US fl. oz.)
Clutch Centrifugal Type
Drive Shaft 1/4" Flex Shaft
Rotating Direction Counter Clockwise viewed from top
C u tte r H e a d Nylon line head (2-line)
Handles* Front-Loop, Right Grip Standard on SRM-3100, 3100S, 3400
U-Handle Standard (SRM-3110)
Shoulder Harness Standard
Idle S peed 2400 - 3000 RPM
Wide Open Throttle
Speed (W.O.T.) with
Nylon Line Head
Wide Open Throttle
Speed (W.O.T.) with
Blade
7mm Spline
Steel S haft
9500 - 11000 RPM
8500 - 9500 RPM
1/4" Flex Shaft
* Install and use U-Handle when operating any model with blade.
8mm Spline
Steel S haft
Page 13
ASSEMBLY
GRASS TRIMMER/BRUSH CUTTER
OPERATOR'S MANUAL
13
DRIVE
Tools Required: 8mm x 10mm Open End Wrench, 4 mm Hex
Wrench
Parts Required: Power head, Drive shaft Assembly
1. Stand powerhead upright on a level surface.
2 . Loosen, the two (2) bolts at engine drive shaft clamps, and
3 . Carefully fit driveshaft assembly to engine making sure that
4 . Turn drive shaft housing until locating hole lines up with location
SHAFT/POWER HEAD
remove center drive shaft location bolt (A).
inner drive shaft engages into clutch mount..
NOTE
Lower bearing housing and head assembly must be in line
with the engine.
hole in clamp and install center drive shaft location bolt (A).
A
5 . Tighten two (2) drive shaft clamp bolts (B).
PLASTIC SHIELD INSTALLATION
(for Nylon Line Operation)
Tools Required: Screwdriver.
Parts Required: Plastic Shield, Shield Plate, three (3) 5mm x 18mm
screws.
A
B
B
Page 14
14
NOTE
The plastic shield is for use with the Nylon Line Head only. Install
Metal Shield when using plastic or metal blades.
1. Install the shield on the bottom of the bearing housing flange.
2 . Place shield plate on shield, align holes and install three (3)
screws.
NYLON LINE HEAD INSTALLATION
Tools Required: Head Locking Tool, 17x19mm Scrench
Parts Required: Nylon Line Head.
1 . Align locking hole in upper plate (B) with notch in edge of gear
housing and insert head locking tool (A).
2 . Remove split pin from hole in PTO shaft.
3 . Remove 10mm nut by turning it clockwise (as viewed from underside
of grass shield) with 17x19mm scrench.
4 . Remove lower plate. Retain lower plate, 10mm nut and split pin for
future use.
5 . Be sure upper plate (B) remains on PTO shaft.
6 . Thread line head onto PTO shaft by turning it counter clockwise
until head is tight against upper plate (B).
B
A
BLADE INSTALLATION
All Models.
IMPORTANT
If non-standard monofilament head, METAL/PLASTIC blade or cultivator etc. is used, THE CARBURETOR
MUST BE RE-SET or serious engine damage may occur. See "Carburetor Adjustment" page 31 - 32 and "Specification" page 12 of this manual for proper adjustment setting.
W ARNING DANGER
You must install a U-Handle Kit and Blade Conversion kit before operating this unit using metal blades, otherwise
serious injury may result.
Install Metal Shield
Tools Required: 8mm x 10mm Open End Wrench, Screwdriver, Scrench.
Parts Required: Metal Shield, Bracket, 3- 5mm x 15mm screws w/captivated flat and lockwasher (metal shield to gear
housing), 2- 5mm x 8mm screws, 4- 5mm nuts, 4- 5mm lockwashers (bracket to shield and bracket to gear housing).
Page 15
GRASS TRIMMER/BRUSH CUTTER
1 . If necessary, remove nylon line head and plastic shield.
2 . Loosely attach bracket (A) to shield (B) and attach to bottom of
gear housing (C) with screws and nuts provided. Tighten all
attaching hardware.
Install Blade
Tools Required: Locking Tool, scrench.
Parts Required: Upper Plate w/ 20mm pilot, Lower Plate, 10mm Nut w/
LH threads, 2mm x 25mm Split Pin (cotter pin).
3 . Install upper plate (D) on splined PTO shaft. Blade installation
requires use of Upper Plate (D) with 20mm pilot (SRM-3100
models), 25.4mm pilot (SRM-3400 models).
4 . Place Blade (E) over upper plate pilot, install the Lower Plate (F)
and 10mm LH nut (G). Tri-Cut Blade (H) is installed with Glide
Cup (J).
OPERATOR'S MANUAL
BLADE UPPER PLATE
15
5 . Insert Locking Tool (K) through hole in upper plate and notch in
gear housing to prevent splined shaft from turning. Tighten nut
and secure with Split Pin (L).
HARNESS CLAMP INST ALLATION
NOTE
Some models require installation of Harness Clamp. If your unit
does not have a clamp, follow these directions.
Tools Required: Screwdriver, 8mm x 10mm Open End Wrench.
Parts Required: Harness Clamp, 4mm x 18mm Hexagon Head, Bolt,
Link.
6. Remove shield and gear housing as an assembly.
a. Loosen two (2) screws (B) that clamp the gear housing to the
drive shaft housing.
b. Remove locating screw (C) found at the top of the gear
housing. Pull shield and gear housing assembly from the drive
shaft assembly.
C
B
B
IMPORTANT
Prevent flexible drive cable/shaft from sliding from drive shaft
housing. If cable/shaft does slide free, clean dirt from cable/shaft
and re-lubricate cable only with lithium based grease prior to
re-assembly.
Page 16
16
7 . Remove front handle.
a. Remove four (4) screws and nuts and handle support from
handle.
b. Remove front handle.
8 . Install harness clamp.
a. Slightly spread clamp and slide up shaft.
b. Install single link using spacer, DO NOT tighten at this time.
9. Install gear housing and shield and front handle.
10 . Balance unit.
a. Put on harness and attach unit to harness.
b. Slide clamp up or down until unit balances with head
approximately 50-75mm (2in-3in) from the ground.
c. Tighten clamp screw.
THROTTLE LINKAGE AND IGNITION LEADS
Tools Required: 8mm x 10mm open end wrench
1 . Close choke and remove air filter cover.
2. Loosen nut (A) and place threaded end of throttle linkage in
bracket slot. Finger tighten nut (A).
3. Place inner cable in slot of carburetor swivel (B) and tighten
nut (A).
4 . Check throttle for freedom of movement and that wide open throttle
/ low idle extremes are adjusted properly. If adjustment cannot be
achieved with adjusting nuts, consult with your Echo Dealer for
correct adjustment procedure.
5 . Connect ignition leads (C).
6 . Install air filter and cover.
A
B
C
Page 17
GRASS TRIMMER/BRUSH CUTTER
FRONT HANDLE INSTALLATION
Tools Required: Screwdriver.
Parts Required: Front Handle Assembly
1 . Position front handle on drive shaft, DO NOT tighten screws yet.
2 . Position front handle for comfortable operation and secure screws.
OPERATOR'S MANUAL
17
U-HANDLE INSTALLATION
Tools Required: 8mm x 10mm Open End Wrench, Screwdriver.
Parts Required: SRM-3100 Series U-Handle Kit P/N 35130455730.
SRM-3400 Series U-Handle Kit P/N 35130455830.
NOTE
On model SRM-3110 use Steps 1, 11 through 16 only.
1 . Close choke and remove air filter cover.
2 . Disconnect two (2) ignition stop leads (C).
3 . Remove inner throttle linkage from carburetor swivel (B).
4 . Loosen nut (A) and remove throttle linkage from bracket.
A
C
B
Page 18
18
5 . Loosen screws (D) and remove center shaft location bolt (E).
6 . Loosen two (2) rear handle screws (F) and pull rear handle (G) from
the drive shaft assembly.
7 . Loosen screw and pull harness clamp (H) from drive shaft
assembly.
8 . Loosen four (4) screws and remove front handle (J).
9 . Position lower U-Handle Bracket (K) 400mm (15-3/4 inches) from
engine end of drive shaft. Secure with three (3) 5mm x 30mm bolts.
10 . Position harness hook 220mm (8-5/8 inches) from engine end of
drive shaft assembly. DO NOT tighten at this time.
11. Install upper U-Handle and bracket on lower bracket and secure
with one (1) 8mm x 55mm bolt (L) and large circular washer.
E
G
J
400 mm (15-3/4 in.)
D
D
H
F
H
ENGINE
END
K
L
220 mm
(8-5/8 in.)
Page 19
GRASS TRIMMER/BRUSH CUTTER
12. Secure throttle linkage and ignition leads to drive shaft with cable
ties supplied.
13. Install power head and align gear box, power head and
U-handles. Tighten all screws.
14. Place throttle linkage in slot in bracket. One nut and washer
on each side of bracket. Finger tighten both nuts (A).
15 . Attach inner cable to swivel (B). Check throttle for freedom
of movement and that wide open throttle / low idle extremes
are adjusted properly. If adjustment cannot be achieved with
adjusting nuts, consult with your Echo Dealer for correct
adjustment procedure.
OPERATOR'S MANUAL
A
19
B
16. Attach ignition leads (C).
17 . Balance unit.
a. Put on harness and attach unit to harness.
b. Slide harness clamp (M) up or down until unit balances with
head approximately 50-75mm (2in. - 3in.) from the ground.
c. Tighten harness clamp screw.
C
M
Page 20
20
PRE - OPERATION
OPERATION
Preparing the Trimmer/Brush Cutter for Blade Use
WITH BLADES
W ARNING DANGER
Blade use DEMANDS specific Brush Cutter configuration. Operation without specified shield and harness can result
in serious personal injury.
Plastic and Nylon Blades Require "Blade Conversion Kit"
(metal shield [A] and shoulder harness [B]).
A
B
Steel/Metal Blades Require "Blade Conversion Kit" PLUS a
"U-Handle Kit." (C)
SRM-3100 Series P/N 35130455730
SRM-3400 Series P/N 35130455830
C
Choosing the Correct Blade
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.
Plastic/Nylon Blades may be used where ever the nylon line head
is used. DO NOT use this blade for heavy weeds or brush!
Page 21
GRASS TRIMMER/BRUSH CUTTER
8 Tooth Weed/Grass Blade is designed for grass, garden debris and
thick weeds. DO NOT use this blade for brush or heavy woody growth,
3/4" in. (19 mm) diameter or larger.
SRM-3100 Series P/N 69600120331
SRM-3400 Series P/N 69600121431
Brush/Clearing Blade is designed for cutting brush and woody growth
up to 3" in. (76 mm) diameter.
SRM-3100 Series P/N 69500120330
SRM-3400 Series P/N 69500121431
OPERATOR'S MANUAL
21
Use Shoulder/Waist Harness (P/N 30100052131) Use of the Shoulder/
Waist Harness is recommended for ALL Trimmer/Brush Cutter use, not
just Blade operation. The Shoulder/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.
Page 22
22
FUEL
Fuel Requirements
Gasoline - Use 89 Octane [ ] (mid grade or higher) gasoline or
gasohol known to be good quality. Gasohol may contain up to 10%
Ethyl (grain) alcohol or 15% MTBE (methyl tertiary-butyl ether).
Gasohol containing methyl (wood) alcohol is NOT approved.
Two Stroke Oil - A two-stroke engine oil meeting ISO-L-EGD Standard
(ISO/CD 13738), must be used. Echo brand Premium 50:1 oil meets this
standard. Engine problems due to inadequate lubrication caused by
failure to use an ISO-L-EGD approved oil, such as Echo Premium 50:1
Two-stroke Oil, 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 EPA Phase I/California Emission
Defect Warranty Explanation.)
Mixing - Follow directions on the oil container.
Handling Fuel
R + M
2
W ARNING DANGER
Fuel is VERY flammable. Use extreme care when mixing, storing or
handling or serious personal injury may result.
• Use an approved fuel container.
• DO NOT smoke near fuel.
• DO NOT allow flames or sparks near fuel.
• Fuel tanks/cans may be under pressure. Always loosen fuel
caps slowly allowing pressure to equalize.
• NEVER refuel a unit when the engine is HOT!
• NEVER refuel a unit with the engine running.
• DO NOT fill fuel tanks indoors. ALWAYS fill fuel tanks
outdoors 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.
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. Contact your ECHO dealer for ordering
information.
Page 23
GRASS TRIMMER/BRUSH CUTTER
After Refueling;
- Wipe any spilled fuel from the unit.
- Move at least 3 M (10 ft.) from refueling location before starting
the engine.
After use;
- DO NOT store a unit with fuel in its tank. Leaks can occur.
Return unused fuel to an approved fuel storage container.
OPERATOR'S MANUAL
23
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.
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 container 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.
3M (10 FT.)
SMTWTF S
1234567
8 9 10 1112 13 14
1516 17 18 19 20 21
2223 24 25 26 27 28
2930 31
• 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.
Page 24
24
• Check that front (loop) handle and shoulder strap/ or shoulder/
waist harness are adjusted for safe, comfortable operation. See
Assembly Section for proper adjustment.
DETERMINE OPERATION AREA
• 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
animals prevented from coming nearer than 15M (50 ft.) while the
trimmer is in use.
• Before starting the unit, equip yourself and any other person working
within the 15M (50 ft.) Safety Zone with the required Protective
Equipment and clothing.
15M (50 ft.)
OPERATION
W ARNING DANGER
Do not operate this product indoors or in inadequately ventilated
areas. Engine exhaust contains poisonous emissions which can
cause serious injury or death.
• Provide all operators of this equipment with the Operator's Manual
and instructions for safe operation.
• 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.
Page 25
GRASS TRIMMER/BRUSH CUTTER
STARTING COLD ENGINE
W ARNING DANGER
The cutting attachment should not rotate at idle. If attachment
rotates, readjust carburetor according to "Carburetor Adjustment"
instructions in this manual or see your ECHO Dealer, otherwise
serious personal injury may result.
1. Stop Switch - Start/Run.
Move stop switch button (A) forward away from the STOP
position.
2. Close Choke - Cold Start.
Move choke (B) to "Cold Start" Position.
3. Primer Bulb -Prime.
Pump primer bulb (C) 10 times. Fuel will be visible and flow freely in
the clear fuel tank return line.
OPERATOR'S MANUAL
A
25
W ARNING DANGER
Inspect starting area for hazards such as rocks, glass, debris etc.
which could be thrown by the cutting attachment when starting.
Keep helpers and bystanders at least 15M (50 ft.) from starting area,
otherwise serious personal injury may result.
4 . Lay the trimmer on a flat clear area. Firmly grasp throttle grip
with left hand and rapidly pull recoil starter handle/rope (D) until
engine fires.
5 . After engine fires, move choke lever to “Run” position and pull
recoil starter handle/rope (D) until engine starts and runs. 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 4 and 5.
6 . After engine warm up, gradually depress throttle trigger to increase
engine RPM to operating speed.
B
C
D
D
Page 26
26
STARTING WARM ENGINE
W ARNING DANGER
The cutting attachment should not rotate at idle. If attachment
rotates, readjust carburetor according to "Carburetor Adjustment"
instructions in this manual or see your ECHO Dealer, otherwise
serious personal injury may result.
1. Stop Switch - Start/Run. Move stop switch button (A) away from
the STOP position.
2. Start - Pull Rope. Lay the trimmer on a flat clear area and pull
the recoil starter handle (D) until the engine fires.
NOTE
If engine does not start after 5 pulls, use Cold Start Procedure.
A
STOPPING ENGINE
1. Release Throttle. Allow engine to idle for a minute.
2. Stop Switch - Stop. Move stop switch button backward to STOP
position.
W ARNING DANGER
If engine does not stop when stop switch is moved to STOP
position, close choke - COLD START position - to stall engine.
Have your ECHO dealer repair stop switch before using trimmer
again.
D
A
Page 27
GRASS TRIMMER/BRUSH CUTTER
OPERATOR'S MANUAL
27
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
Level 1 = Easy to do. Most required tools come with unit.
Level 2 = Moderate difficulty. Some specialized tools may be required.
Level 3 = Experience required. Specialized tools are required. ECHO recommends that
the unit be returned to your ECHO dealer for servicing.
ECHO offers REPOWER
TM
Maintenance Kits and Parts to make your maintenance job easier. Below each task heading
are listed the various part numbers required for that task. See your ECHO dealer for these parts.
MAINTENANCE INTER VALS
/TNENOPMOC
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ERUDECORP
D'QER
LLIKS
LEVEL
ROYLIAD
EROFEB
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YREVE
LEUFER
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SHTNOM
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Page 28
28
AIR FILTER
Level 1.
Tools required: 25-50mm (1in. or 2in.) medium bristle paint brush.
Parts required: 90030 REPOWERTM AIR & FUEL FILTER KIT.
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 cleaner area.
2 . Remove the air cleaner cover. Clean and inspect the element for
damage. If element is fuel soaked and very dirty, replace.
3 . If element can be cleaned and reused, be certain it:
•still fits the cavity in the air cleaner cover.
•is installed with the original side out.
NOTE
Carburetor adjustment may be needed after air filter cleaning/
replacement.
FUEL FILTER
Level 1.
Tools required: Fuel line hook. 203-254mm (8in.-10in.) length of wire
with one end bent into a hook. Clean rag, funnel, and an approved fuel
container.
Parts required: 90030 REPOWERTM AIR & FUEL FILTER KIT.
W ARNING DANGER
Fuel is VERY flammable. Use extreme care when mixing, storing or
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.
Page 29
GRASS TRIMMER/BRUSH CUTTER
SPARK PLUG
Level 2.
Tools Required: Scrench (combination socket wrench & screw driver)
Feeler gauge, preferably a wire gauge. Brush.
Parts Required: Spark Plug, NGK BPM-7A
P/N 15901010630.
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.
3. Adjust spark plug gap by bending outer electrode.
4 . Tighten spark plug to 145-155 kg/cm (125-135 in. lb.).
OPERATOR'S MANUAL
0.65 mm
(0.026 in.)
29
COOLING SYSTEMS CLEANING
Level 2.
Tools required: Cross Head Screwdriver, 3 MM Hex Wrench, Pointed
Wood Stick, 25-50mm (1in.-2in.) medium bristle paint 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.
SRM-3100, 3110 Type 2/2E
1 . Remove spark plug lead and throttle cable end from the carburetor
swivel.
2 . Remove the four screws that retain the engine cover (A). Two at
the top of the recoil starter, two on either side of the front. Lift the
cover from the engine and lay to the front of the trimmer.
NOTE
The throttle linkage remains assembled to the cover and the spark
plug lead and grommet remain installed.
A
Page 30
30
All Models
3 . Use the wooden stick or brush to remove dirt from the cylinder
fins.
4 . Remove grass and leaves from the grid between the recoil starter
and fuel tank.
NOTE
On SRM-3100, 3110 Type 2E models only, when installing the
engine cover, be certain the tab of the metal deflector shield is in the
slot of the cover.
EXHAUST SYSTEM
Spark Arrestor Screen
Level 2.
Tools Required: Cross Head Screwdriver. Scrench. Soft metal brush.
Wooden carbon scraper. 3mm and 4mm Hex Wrench.
Parts Required: Screen P/N 14590555730
Lid Gasket P/N 14586655730
SRM-3100, 3110 Type 2/2E
1A. Remove engine cover (A). See “Cleaning Cooling System” pages
29 & 30 for step by step instructions.
E
D
C
Page 31
GRASS TRIMMER/BRUSH CUTTER
SRM- 3100S, 3400 Type 1/1E
1 B. Remove three (3) screws retaining muffler cover (B).
All Models
2 . Place piston at Top Dead Center (TDC) to prevent carbon/dirt
from entering cylinder.
3 . Remove screen holder (C), gasket (D) and screen (E) from muffler
body.
4 . Clean carbon deposits from screen and muffler components.
5 . Replace screen if it is cracked, plugged or has holes burned
through.
OPERATOR'S MANUAL
B
D
C
31
E
CARBURETOR ADJUSTMENT
Emissions Models (With Limiter Caps)
Level 2.
Tools required: Screwdriver, Tachometer (ECHO P/N 99051130017).
Parts required: None.
NOTE
Every unit is run at the factory and the carburetor is set in compliance with EPA Phase 1 and California Emission Regulations. In
addition, the carburetor is equipped with HI and LO needle
adjustment limiters that prevent settings outside acceptable limits.
1 . Before adjusting the carburetor, clean or replace the air filter and
spark arrester screen.
2 . Trimmer line must be extended to the cut-off knife.
3. Start engine and run for several minutes to reach operating
temperature.
4 . Stop engine. Turn HI speed needle (A) CCW (counter clockwise)
to stop. Turn LO speed needle (B) midway between full CCW and
CW (clockwise) stops.
5 . Idle Speed Adjustment.
• Start engine and turn idle speed adjustment screw (C) CW
until the cutting attachment begins to turn, then turn the screw
CCW until attachment stops turning. Turn screw (C) CCW an
additional 1/4 turn.
Page 32
32
6 . Accelerate to full throttle for 2-3 seconds to clear excess fuel
from engine then return to idle. Accelerate to full throttle to check
for smooth transition from idle to full throttle. If engine hesitates,
turn LO needle (B) CCW an additional 1/8 turn and repeat acceleration. Continue adjusting until smooth acceleration results.
7 . Check HI speed RPM at W.O.T. (Wide Open Throttle). HI speed
RPM should be set to the specifications found on Page 12
"Specifications" of this manual for the type of cutting attachment
on this unit.
8 . Check idle speed and reset if necessary. If a tachometer is avail-
able, idle speed should be set to the specifications found on page
12 "Specifications" of this manual.
W ARNING DANGER
When carburetor adjustment is completed, the cutting attachment
should not turn at idle, otherwise serious personal injury may
result.
CARBURETOR ADJUSTMENT
Non Emission Models (Without Limiter Caps)
Tools Required: Screwdriver, Tachometer (ECHO P/N 90051130017).
NOTE
If carburetor has limiter caps follow "Carburetor Adjustment"
procedures for Type 1E models on previous page.
Idle Speed Adjustment
Turn "idle" speed adjustment screw (C) CW (clockwise) until cutting
attachment begins to turn, then turn screw out CCW (counter clockwise) until attachment stops turning. Turn screw out, CCW an additional 1/4 turn.
W ARNING DANGER
Cutting attachment must not turn when unit is idling, otherwise
serious personal injury may result.
Basic Setting
1 . Stop engine and turn both LO (B) and HI (A) needles in, CW until
they stop and are lightly seated.
Important
DO NOT over tighten needles. Forcing them to tighten will damage
the carburetor.
2 . Turn LO (B) needle out, CCW 1-1/8 turns. Turn HI (A) needle out
CCW 1-1/8 turns.
Page 33
GRASS TRIMMER/BRUSH CUTTER
Fine Tuning
(Requires Accurate Tachometer)
1 . Start engine and allow to warm to operating temperature (minimum
2 - 3 minutes) varying engine speed from idle to full throttle.
2 . Always begin fine tuning with LO (B) needle.
a. Lean drop-off - With engine idling, turn LO (B) needle slowly
CW (in) to lean drop-off point. RPM will increase, then
abruptly drop-off. Note this position. (1)
b. Rich drop-off - With engine idling, slowly turn LO (B) needle
CCW (out) to rich drop-off point. RPM will increase then
gradually slow and drop-off. Note this position. (2)
c. Final setting - Set needle at mid point between lean rich drop-
off points. (3)
d. Turn needle 1/8 turn CCW (out) making mixture slightly
richer. (4)
OPERATOR'S MANUAL
33
3. HI speed adjustment.
Adjust HI (A) needle with tachometer. Refer to Wide Open
Throttle RPM settings listed in "Specifications" on page 12.
4 . Check idle speed and reset if necessary. If tachometer is available,
idle speed should be set to the specifications found on page 12
"Specifications" of this manual.
W ARNING DANGER
When carburetor adjustment is completed, the cutting attachment
should not turn at idle, otherwise serious personal injury may
result.
Page 34
34
LUBRICA TION
Level 1.
Tools Required: 8 mm Open End Wrench, Screwdriver, Clean Rag.
Parts Required: Lithium Base Grease.
Gear Housing
1 . Clean all loose debris from gear box.
2 . Remove plug (A) and check level of grease.
3 . Add grease if necessary, DO NOT over fill.
Drive Shaft
SRM-3100, 3110 Type 2/2E Only
1 . Loosen two (2) screws (B) and remove center locating screw (C).
Pull gear box and shield from drive shaft.
A
C
B
2 . Pull flexible cable from the drive shaft housing, wipe clean and
recoat with a thin coating of [1/2 oz. (15 ml)] of high temperature
automotive grease.
3 . Slide the flexible cable back in the drive housing. DO NOT get
dirt on the flex shaft.
4. Install the gear housing and shield assembly.
NYLON LINE REPLACEMENT
(SRM-3100, 3110 Type 2/2E)
Level 1
Tools Required: Head locking tool (if head is to be removed)
Parts Required: ECHO 0.095" Nylon Trimmer Line 12m (40 feet) long.
1 . Hold drum (A) and turn spool (B) CW (clockwise) until it stops.
Pull spool from drum. DO NOT push in on spool when turning.
Page 35
GRASS TRIMMER/BRUSH CUTTER
2 . Use one piece of new nylon line (C) 12m (40 ft.) long and thread
through the molded loop (D) on the spool. Pull line tight and
adjust so one end is 15 cm (6 in.) longer than the other.
3. Hold spool with the tap knob in your hand and opening toward
you. Place index finger between the two lines and wind line
clockwise tightly and evenly.
4 . Stop when approximately 15-20 cm (6" - 8") line (C) remains and
place ends of line in notches (E) in spool (B).
OPERATOR'S MANUAL
35
5. Feed ends of line through housing eyelets (F) and place spool (B)
over drive (G). Align pegs (H) on drive with notches in spool and
push spool into drum.
6 . Pull on both lines until they come free from notches (E) in spool.
7 . Hold drum (A) firmly and turn spool (B) CCW (counterclockwise)
until it stops. DO NOT push in on spool when turning.
8 . Pull both lines out and trim to cut-off knife length.
Page 36
36
NYLON LINE REPLACEMENT
SRM-3100S, 3400
Tools Required: Head locking tool (if head is to be removed)
Parts Required: ECHO 0.105 in. Nylon Trimmer Line 15m (50 feet) long.
1. Shut engine off. Lay unit on the ground with head assembly up.
2 . Hold head firmly and push in cover tabs (A) to remove spool.
3 . Use one piece of nylon line (B) and thread through the molded
loop (C) on the spool spindle until ends are even.
4. Hold spool with the tap knob in your hand and opening toward
you. Place index finger between the two lines and wind line
clockwise tightly and evenly.
A
A
C
B
5 . When approximately 15-20 cm ( 6- 8in.) of line remains, place lines
in spool notches (D).
6. Place spool in housing against spring; thread line ends through
housing eyelets (E).
7. Align cover tabs with tab holes in housing and push until tabs
snap lock into place.
8 . Pull on both lines until they come free from notches in spool.
9 . Index line out by pushing tap knob and trim to cut-off knife length.
D
D
E
E
Page 37
GRASS TRIMMER/BRUSH CUTTER
SHARPENING METAL BLADES
Three styles of metal blades are approved for use on the ECHO
Brushcutter. The 8-tooth blade can be sharpened during normal
maintenance. The clearing blade and 80 tooth blade require professional service.
Before sharpening, CLOSELY inspect blade for cracks (look at the
bottom of each tooth and the center mounting hole closely), missing
teeth and bending. If ANY of these problems are discovered, replace
the blade.
When sharpening a blade, always remove the same amount of materials
from each tooth to maintain balance. A blade that is not balanced will
cause unsafe handling due to vibration and can result in blade failure.
8-tooth Blade
Tool required: Flat file (preferred). Electric grinder if special care is
used. Round (rat tail) file for gullet (radius).
OPERATOR'S MANUAL
37
1 . File each tooth at a 30 degree angle a specific number of times,
eg. 4 strokes per tooth. Work your way around the blade until
all teeth are sharp.
2 . DO NOT file the 'gullet' (radius) of the tooth with the flat file.
The radius must remain. A sharp corner will lead to a crack and
blade failure.
IMPORTANT
If an electric grinder is used, use care not to overheat teeth, do not
allow tips/tooth to glow red or turn blue. DO NOT place blade in
cooling water. This will change the temper of the blade and could
result in blade failure.
3. After sharpening teeth, check each tooth radius for evidence of a
square (sharp) corner. Use the round (rat tail) file to renew the
radius.
Page 38
38
TROUBLESHOOTING
Problem
Eng i ne -- s ta rts ha rd
Engine -- does not start Cause Remedy
Engine
Cranks
Engine
does not
crank
Fuel at
carburetor
Fuel at
cylinder
Spark at end
of plug wire
Spark at plug No spark
No fuel at
carburetor
No fuel at
cylinder
Muffler wet
with fuel
No sp ark
at end of
plug wire
at plug
Fuel strainer clogged
Fuel line clogged
Carburetor
Carburetor See your ECHO dealer
Fuel Mixture is too rich Open choke
Stop switch off
Electrical problem
Interlock switch
Spark gap incorrect
C o vere d wi th ca rbo n
Fouled with fuel
Spark plug defective
Internal engine problem See your ECHO dealer
Clean
Clean
See your ECHO dealer
Clean/replace air filter
Adjust carburetor
See your ECHO dealer
Turn switch on
See your ECHO dealer
See your ECHO dealer
Adjust 0.65mm (0.026in.)
Clean or replace
Clean or replace
Replace plug
Engine
runs
Dies or accelerates poorly Air filter dirty
Fuel filter dirty
F uel vent plugged
Spark plug
Carburetor
Cooling system plugged
Spark arrestor screen
plugged
Clean or replace
Replace
Replace
Clean and adjust/replace
Adjust
Clean
Clean
W ARNING DANGER
Fuel vapors are extremely flammable and may cause fire and/or explosion. Never test for ignition spark near an
open spark plug opening, otherwise serious personal injury may result.
Page 39
GRASS TRIMMER/BRUSH CUTTER
OPERATOR'S MANUAL
STORAGE
Long Term Storage (over 30 days)
Do not store your unit for a prolonged period of time (30 days or longer) without performing protective storage maintenance which includes the following:
1 . Store unit in a dry, dust free place, out of the reach of children.
W ARNING DANGER
Do not store in enclosure where fuel fumes may accumulate or reach an open flame or spark.
2. Place the stop switch (A) in the "STOP" position.
39
3 . Remove accumulation of grease, oil, dirt and debris from exterior of
unit.
4 . Perform all periodic lubrication and services that are required.
5. Tighten all the screws and nuts.
6. Drain the fuel tank completely and pull the recoil starter handle
several times to remove fuel from the carburetor.
7 . Remove the spark plug and pour 7 cc (1/4 oz.) (1/2 tablespoon) of
fresh, clean, two-stroke engine oil into the cylinder through the
spark plug hole.
A. Place a clean cloth over the spark plug hole.
B . Pull the recoil starter handle 2-3 times to distribute the oil inside
the engine.
C. Observe the piston location through the spark plug hole. Pull
the recoil handle slowly until the piston reaches the top of its
travel and leave it there.
8. Install the spark plug (do not connect ignition cable).
A
Page 40
SERVICING INFORMATION
PARTS
Genuine ECHO Parts and ECHO Re Power Parts and Assemblies for
your ECHO products are available only from an Authorized ECHO
Dealer. When you do need to buy parts always have the Model
Number, Type Number and Serial Number of the unit with you. You can
find all three numbers on the engine housing. For future reference,
write them in the space provided below.
Model No. ____________Type 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). When presenting your unit for Warranty
service/repairs, proof of purchase is required.
DEALER?
Call
1-800-432-ECHO
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
Consumer Product Support Department at 1-800-673-1558 from 8:00 am
to 5:00 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 - 5 Mon - Fri C.S.T.
WARRANTY CARD
This card is our means of registering all original owners of ECHO
equipment. The card plus proof of purchase provides you the assurance that authorized warranty work will be done. It also provides a
direct link between you and ECHO if we find it necessary to contact
you.
ADDITIONAL OR REPLACEMENT MANUALS
Safety Manuals are available, free of charge, from your ECHO dealer
or by contacting Echo Incorporated, 400 Oakwood Road, Lake Zurich,
IL 60047
ECHO Incorporated
400 Oakwood Road
Lake Zurich, IL 60047
Operator's and Parts Manuals are available for purchase from
your ECHO dealer or directly from ECHO. [See ordering instructions at
the end of this manual.]
Technical Publications Orders
Safety Video is available from your dealer. A $5.00 shipping charge
will be required.
ORDERING INSTRUCTIONS
To obtain a Parts Catalog or Operator's Manual send a check or money order for $2.00 per Parts Catalog or $1.50 per
Operator's Manual made payable to ECHO, INCORPORATED. State on a sheet of paper model number and serial number
of the ECHO unit you have, part number of the manual (if known), your name and address and mail to address above.
Available Parts Lists
SRM-3100/3100S/3110 TYPE 1/1E S/N 001001 & UP PART NUMBER 99922202566
SRM-3400 TYPE 1/1E S/N 001001 & UP PART NUMBER 99922202732
SRM-3100/3110 TYPE 2E S/N 001001 & UP PART NUMBER 99922202889
ECHO, INCORPORATED
400 OAKWOOD ROAD
LAKE ZURICH, IL 60047
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