Echo PB-461LN User manual

WARNING DANGER
Readrulesforsafeoperationandallinstructionscarefully. ECHOprovidesthis
Operator'sManualwhichmustbereadandunderstoodforproperandsafeoperation.
Power Blower
Operator'sManual
MODEL PB-461LN
X750006820
11/05
X7501129600

2
TABLE OF CONTENTS
Introduction ...............................................................2
- The Operator's Manual .......................................2
Safety .........................................................................3
- Manual Safety Symbols and Important
Information .........................................................3
- InternationalSymbols .........................................3
- Personal Condition and Safety Equipment .........3
- Equipment ...........................................................6
EmissionControl........................................................6
Description ................................................................7
Contents ....................................................................8
Assembly ...................................................................9
- InstallBlowerPipes/Stick Handle .....................9
Operation ................................................................. 10
- Fuel ................................................................... 10
- StartingColdEngine ......................................... 11
- StartingWarmEngine ....................................... 12
- Stopping Engine ............................................... 12
- OperatingBlower .............................................. 13
Maintenance ............................................................ 14
- SkillLevels ........................................................ 14
- Maintenance Intervals ...................................... 14
- Airfilter............................................................. 15
- FuelFilter .......................................................... 15
- SparkPlug......................................................... 16
- CoolingSystem................................................. 16
- ExhaustSystem................................................. 17
- Carburetor Adjustment ..................................... 18
Troubleshooting ...................................................... 20
Storage..................................................................... 21
Specifications........................................................... 22
ServicingInformation............................................... 24
- Parts.................................................................. 24
- Service .............................................................. 24
- Customer Assistance........................................ 24
- Warranty Card .................................................. 24
- Additional or Replacement Manuals ................ 24
- Manual Ordering Instructions .......................... 24
Specifications, descriptions and illustrative material in this
literature are as accurate as known at the time of publica-
tion, but are subject to change without notice. Illustrations
may include optional equipment and accessories, and may
not include all standard equipment.
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. You will find it easy to use and full of helpful operating tips and
SAFETYmessages.
THE OPERATOR'SMANUAL
Read and understand this manual before operation. Keep it in a safe
place for future reference. It contains specifications and information for
operation, starting, stopping, maintenance, storage and assembly
specific to this product.
CopyRight©2005ByEcho,Incorporated
All Rights Reserved.

3
POWER BLOWER
OPERATOR'SMANUAL
SAFETY
MANUAL SAFETY SYMBOLS AND IMPORTANT INFORMATION
IMPORTANT
NOTE
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.
INTERNATIONALSYMBOLS
Symbol
description/application Symbol form/shape Symbol
description/application
Symbol form/shape
Read and understand
Operator's Manual. Fuel and oil mixture
Symbol
description/application Symbol form/shape Symbol
description/application
Symbol form/shape
Hot
Surface Carburetor adjustment
- Idle speed Carburetor adjustment
- High speed mixture
Wear eyes, ears and
head protection
Emergency stop
Finger Severing Carburetor adjustment
- Low speed mixture
Safety/Alert
Wear hand
protection.Use
twohanded.
DONOTsmoke
nearfuel.
DONOTallow
flamesorsparks
nearfuel.
Wear slip
resistantfoot
wear.
Ignition
ON/OFF
Primerbulb
Choke Control
"Cold Start"
Position
(ChokeClosed)
Choke Control
"Run"
Position
(ChokeOpen)
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.
This symbol accompaniedby 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.
PERSONAL CONDITION AND SAFETY EQUIPMENT
WARNING DANGER
Power Blower users risk injury to themselves and others if the power blower is used improperly or safety precautions
are not followed. Proper clothing and safety gear must be worn when operating a blower.

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 blower handle. Gloves also reduce the transmission
of machine vibration to your hands.
Breathing Protection
Wear a facemask to protect against dust.
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,andJEWELRY.
Wear sturdy work shoes with nonskid soles:
• DONOTWEAROPENTOEDSHOES,
• DONOTOPERATEUNITBAREFOOTED.
Keep long hair away from engine and blower intake. Retain hair with cap or net.
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
sensations, followed by loss of color and numbness in the fingers. The following precautions are strongly recom-
mended,because the minimum exposure, whichmight trigger theailment, 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 physi-
cian before further exposing yourself to cold and vibration.

5
POWER BLOWER
OPERATOR'SMANUAL
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
riskfordeveloping a Repetitive StressInjury(RSI).An extreme RSI conditionisCarpal 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 pre-
vented.
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.
Read the Manuals
• 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
animalspreventedfromcomingnearerthan15m(50ft.)while the
unit is in use.
• Take wind conditions into account: avoid open doors and
windows.
• Do not point blower at people or animals.
Keep a Firm Grip
• Hold the front and rear handles with both hands, with thumbs
and fingers 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.
Avoid Hot Surfaces
• Keep exhaust area clear of flammable debris. Avoid contact
duringandimmediately afteroperation.

6
PRODUCTEMISSIONDURABILITY
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.
EMISSION CONTROL
California Tier III
The emission control system for this engine is EM/TWC (Engine Modification and Catalyst).
IMPORTANTENGINEINFORMATION
ENGINEFAMILY: 5EHXS.0444KA DISPLACEMENT: 44.0CC
EMISSIONCOMPLIANCEPERIOD:300HRS.
EMISSION COMPLIANCE PERIOD: 300 Hours
THIS ENGINE MEETS U.S. EPA PH2 AND 2005 - 2006
CALIFORNIA EMISSION REGULATIONS FOR SOREs.
REFER TO OWNER'S MANUAL FOR MAINTENANCE
SPECIFICATIONS AND ADJUSTMENTS.
EQUIPMENT CHECK
WARNING DANGER
Use only ECHO approved attachments. Serious injury may result from the use of a non-approved attachment
combination. 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.
• Do not use blower if any part is missing or damaged.
• Have repairs done only by an authorized ECHO Service dealer.
• Do not use any attachment, accessory or replacement part unless it is recommended in this Operator's Manual.
AnEmissionControlLabelis located on the unit. (This is an EXAMPLE ONLY,informationonlabelvariesbyengine
FAMILY).

7
POWER BLOWER
OPERATOR'SMANUAL
4
5
6
7
8
13
DESCRIPTION
14
P/N89016006361
P/N89016009461
65 Category I
dB(A)
Measured at 50 ft. (15m) per ANSI B175.2
P/N89061721260
P/NX508000120
Spark Plug Cover Label
Hot Decal (near muffler)
General Warning Decal (located on top of blower)
Sound Label (located on blower housing)
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. SeePARTSORDERINGinstructionsforspecificinformation.

8
1. AIRCLEANER-Containsreplaceableairfilterelement.
2. SPARKPLUG- Providesspark to ignitefuel mixture. Sparkplug is locatedunder the coveron LN models.
3. SPARKARRESTOR-CATALYTICMUFFLER/MUFFLER-Themufflerorcatalyticmufflercontrolsexhaust
noise and emission. The spark arrestor screen prevents hot, glowing particles of carbon from leaving the muffler.
Keepexhaust areaclearofflammable debris.
4. RECOILSTARTERHANDLE-Pullrecoilhandleslowlyuntilstarterengages,thenquicklyandfirmly. When
engine starts, return handle slowly. DO NOT let handle snap back or damage to unit will occur.
5. PURGEBULB- Pumping purge bulbbefore starting engine draws freshfuel 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.
6. CHOKE - Move lever up to Cold Start ( ) starting position and for emergency stopping. Move lever down to
Run position ( ).
7. FUELTANKCAP-Coversandsealsfueltank.
8. BLOWERPIPES-Twistlockdesign.
9. THROTTLEPOSITIONLEVER/STOPSWITCH-Combinationstopswitchandvariablespeedthrottlelever.
When the lever is moved all the way forward the blower is at Wide Open Throttle (W.O.T.). When the lever is
moved rearward to detent, the blower is at idle. When the lever is moved rearward past the idle detent the blower will
stop.
10. SAFETYDECAL-Listsimportantsafetyprecautions.
11. THROTTLEHANDLE-Rotatesdownwardforthrottlecontrolaccess.Springloadedforflexibleoperation.
12. SHOULDER HARNESS - Supports unit on operator's back. Pull down on loose ends of straps to position unit for
comfortable operation. Loosen straps to remove the unit.
13. FLEXIBLEPIPE-Allowsforfullrangeofmovement.
14. STICKHANDLE- Providescomfortablegripfordirectingairflow.
CONTENTS
__ 1 - PowerHead
__ 1 - FlexPipe
__ 1 - PipewithSwivel
__ 1 - StraightPipe
__ 1 - CurvedPipe
__ 1 - Operator's Manual
__ 1 - Warranty Registration Card
__ 1 - ECHOEmissionsandWarrantyStatement
__ 2 - Clampsw/screws
__ 1 - StickHandle Assembly
__ 1 - EchoPowerBlendTM 2-strokeoilsample

9
POWER BLOWER
OPERATOR'SMANUAL
ASSEMBLY
WARNING DANGER
Never perform maintenance or assembly procedures with engine
running or serious personal injury may result.
INSTALL BLOWER PIPES / STICK HANDLE
1. Assemble clamps (A) onto both ends of flexible pipe (B).
2. Assembleswivelpipe(C)intoflexible pipe (B) and tighten clamp
(A).
3. Assemble flexible pipe (B) to elbow (D) on blower and tighten
clamp(A).
NOTE
A light lubricant may be used to ease assembly of flexible pipe to
blowerelbow.
4. Loosen wing nut (E) completely and open stick handle clamp.
5. Align notches (F) in handle clamp with tabs (G).
6. Slide stick handle onto swivel pipe (C). Stick handle should be
angled away from operator.
7. Position stick handle (H) for comfortable operation, and tighten
wingnut(E).
8. Assemble straight pipe (I) to swivel pipe (C), turning straight pipe
clockwisetolock in place.
9. Assemble curved pipe (J) to straight pipe (I) turning curved pipe
(J)clockwisetolockinplace.
I
J
C
C
AA
B
B
D
H
E
G
F
G

10
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.
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, airtight container. Store
in a well-ventilated, unoccupied building,
away from sparks and flames.
IMPORTANT
Storedfuelages. Do not mixmorefuel
than you expect to use in thirty (30)
days, ninety (90) days when a fuel
stabilizeris added.
IMPORTANT
Stored two-stroke fuel may separate.
ALWAYS shake fuel container
thoroughly before each use.
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004
OPERATION
FUEL
Fuel Requirements
Gasoline-Use89Octane [R+M/2] (mid grade orhigher)gasoline
known to be good quality. Gasoline may contain up to 15% MTBE
(methyltertiary-butyl ether). Gasohol containing methyl (wood)
alcohol is NOT approved.
TwoStrokeOil-Atwo-strokeengineoilmeetingISO-L-EGD(ISO/CD
13738)and J.A.S.O.FC Standards must be used. Echo brandpremium
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
BlendTM,willvoidthetwo-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.)
IMPORTANT
EchopremiumPowerBlendTMUniversal2-StrokeOilmaybemixed
at 50:1 ratio for application in all Echo engines sold in the past
regardless of ratio specified in those manuals.
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.
• NEVERrefuelaunitwhentheengineisHOTorRUNNING!
• DONOT fill fuel tanks indoors.ALWAYS fill fuel tanks outdoors
over bare ground.
•DONOToverfillfueltank. Wipeupspillsimmediately.
• 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.
• Move at least 3m (10 ft.) from refueling location before starting
the engine.
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.
4. Add remaining gasoline, close fuel container,and remix.

11
POWER BLOWER
OPERATOR'SMANUAL
STARTING COLD ENGINE
• Recoil starter: Use short pulls - only 1/2-2/3 of rope length for
starting. Do not allow the rope to snap back in. Always hold the
unitfirmly.
• Rotate throttle handle downward to a comfortable operating
position.
1. Throttle Lever
Movethrottle lever(A)toIDLEDETENT position.
2. Choke
Move choke (B) up to Cold Start position ( ).
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.
4. Recoil Starter
Pullrecoil starter handle(D) until enginefires (5 pulls).
5. Choke
Move choke (B) down to run position ( ), and if necessary,
restart engine.
NOTE
If engine does not start after 5 pulls, repeat instructions 2 - 5.
NOTE
Allow engine to warm up before use.
A
D
B
C

12
STARTING WARM ENGINE
1. Throttle Lever
Movethrottle lever(A)toIDLEDETENT 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.
3. Recoil Starter
Pull recoil starter handle (D) and engine should start. Do not use
choke(B).
NOTE
If engine does not start after 5 pulls, use cold start procedures.
STOPPING ENGINE
1. Throttle Lever
Move throttle lever (A) to idle detent position and allow engine to
return to idle before shutting off engine.
2. Move throttle lever (A) to "O" (Stop) position.
WARNING 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 blower
again.
A
A
C
D

13
POWER BLOWER
OPERATOR'SMANUAL
OPERATING BLOWER
WARNING DANGER
Always wear safety glasses, hearing protection, a face filter mask
and take all safety precautions or serious personal injury may
result.
Do not point the blower pipe in the direction of people or pets.
Read the Safety Section carefully.
IMPORTANT
To avoid engine damage due to over-revving, do not block
blower pipe opening.
1. Use only during appropriate hours.
2. Make sure all blower pipes are installed.
3. Allow the engine to warm up at a fast idle for a few minutes.
4. Set engine speed with throttle (A).
5. Use lower speed to blow dry grass and leaves from walks, patios
and drives.
6. Additional speed may be necessary to clean leaves from a lawn or
flowerbed.
7. Higher speed may be necessary to move gravel, dirt, snow, bottles
or cans from a driveway, street, parking lot or stadium.
NOTE
Never use a higher speed setting than necessary to perform a task.
Remember, the higher the engine speed, the louder the blower noise.
Minimize dust by using blower at lower speeds and by dampening
material with water/mist when necessary. Keep debris on your
property.
Be Smart - be a good neighbor.
A

14
MAINTENANCE
Your ECHO blower is designed to provide many hours of trouble free service. Regular scheduled maintenance will help
your blower 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 task is not listed, see your ECHO Dealer for repairs.
SKILL LEVELS
Level1= Easy to do. Most required tools come with unit.
Level2= Moderatedifficulty. Some specialized tools maybe required.
Level3= Experiencerequired.Specializedtoolsarerequired.Echorecommends
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
/TNENOPMOC
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15
POWER BLOWER
OPERATOR'SMANUAL
WARNING DANGER
Allow the engine and muffler to completely cool before performing
any maintenance activity.
AIR FILTER
Level1.
Tools required: 25mm-50mm(1-2in.)cleaningbrush.
Parts required: TuneUpKitP/N90071
NOTE
Cleandaily.
1. Closechoke,removeaircleanercover,airfilter,andsilencer.
2. Clean and inspect air filter 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.
4. Wash silencer in suitable solvent such as dish washing solution.
5. Drysilencerbeforereinstalling.
FUEL FILTER
Level1.
Tools required: 200-250mm(8-10in.)lengthofwirewithoneend
bent into a hook, clean rag, funnel, and an approved
fuelcontainer.
Parts required: TuneUpKitP/N90071
WARNING DANGER
FuelisVERYflammable.Useextremecarewhenmixing,storingor
handling.
1. Use a clean rag to remove loose dirt from around fuel cap and
emptyfueltank.
2. Use the “fuel line hook” to pull the fuel line and filter from the
tank.
3. Removethefilter from the lineand install the newfilter.

16
SPARK PLUG
Level2.
Tools required: 3/4 in. Spark Plug deep socket, Feeler gauge
Parts Required: TuneUpKitP/N90071
IMPORTANT
UseonlyNGKBPM-8Ysparkplug(BPMR-8YinCanada)
otherwise severe engine damage may occur.
1. Remove spark plug cover and spark plug, check for fouling, worn
and rounded center electrode.
2. Clean the plug or replace with a new one. DO NOT sand blast to
clean.Remainingsandwilldamageengine.
3. Adjust spark plug gap by bending outer electrode.
4. Tightensparkplugto150-170kg/cm(130-150in.lb.).
5. Install spark plug cover.
IMPORTANT
Always reinstall spark plug cover, otherwise engine cooling will
be greatly reduced, and engine failure will result.
COOLING SYSTEMS CLEANING
Level2.
Tools required: 25- 50mm (1 - 2in.) cleaning brush, cross head
screwdriver
Parts Required: None, if you are careful.
IMPORTANT
To maintain proper engine operating temperatures, cooling air
mustpass freely through the cylinder fin area. This flow of air
carriescombustion 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.
Cleaning Grill
1. Removeaccumulateddebrisfromintakegrillbetweenbackpack
frame and blower housing.
INTAKE
GRILL
0.65 mm
(0.026 in.)

17
POWER BLOWER
OPERATOR'SMANUAL
Cleaning Cylinder Fins
1. Remove spark plug cover and spark plug.
2. Remove engine cover (five screws), pull cover away from engine,
and tie temporary knot in starter rope. Clean cylinder fins to allow
cooling air to pass freely.
IMPORTANT
Always reinstall spark plug cover, otherwise engine cooling will
be greatly reduced, and engine failure will result.
EXHAUST SYSTEM
Spark Arrestor Screen
Level2.
Tools required: Cross head screwdriver, Soft metal brush
Parts Required: Spark arrestor screen, Gaskets (3)
IMPORTANT
Carbon deposits in muffler will cause a drop in engine output and
overheating. Spark arrestor screen must be checked periodically.
1. Remove spark plug and engine cover (five screws).
IMPORTANT
Exactplacementofexhaustgasketsonmuffleriscritical.Carefully
note orientation of each gasket when removing and installing.
2. Remove spark arrestor cover (A), gaskets (B), (C), (D), and spark
arrestorscreen(E)frommuffler.
NOTE
When cleaning carbon deposits, be careful not to damage the
catalyticelementinsidemuffler.
3. Clean carbon deposits from muffler components.
NOTE
The exhaust gasket outlets should be partially restricted. The
gaskets will be properly assembled when all six (6) small round holes
areinalignment.
4. Replace screen if it is cracked, plugged, or has holes burned
through.
5. Assemble components in reverse order.
DCB
A
E

18
CARBURETORADJUSTMENT
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 may be required for proper operation of this
engine.
IMPORTANT
For engine operation above 2,000 feet, turn the high-speed needle
lean (CW) until the engine runs between 6,200 and 7,200 RPM. Then
turn the low-speed needle lean (CW) until the engine does not
hesitate on acceleration.
For engine operation below 2,000 feet, turn the high-speed needle
rich(CCW)until the engine runsbetween 6,200and7,200 RPM.
Then turn the low-speed needle rich (CCW) until the engine does
not hesitate on acceleration.
DONOTREMOVELIMITERCAPS!
Level2.
Tools required: Screwdriver,tachometer(EchoP/N99051130017)
Parts required: None.
NOTE
Do not adjust carburetor unless necessary. If you have difficulty,
seeyourECHOdealer.
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
ECHOdealer forthisimportantmaintenanceservice.

19
POWER BLOWER
OPERATOR'SMANUAL
Adjustment Screws
Idle Speed (A) Control throttle opening at idle.
Low(LO)Speed(B) Controls amount of fuel at low speed and
supplementary fuel for smooth progression from
idle to high speed.
High(HI)Speed(C) Controls amount of fuel at full throttle
Before Adjustment
Checkthat:
• Air filter is clean and properly installed.
• Spark arrestor screen and exhaust port are free of carbon
• Blowerpipesareinstalled
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
Limitercapsprevent exceeding emission limitsandoverrich
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.
1. Start engine, run at idle for one minute.
2. Complete warm up by running at full throttle for 5 minutes,
operating 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.
4. Use a tachometer to adjust idle speed to specifications found on
page22.
A
B
C

20
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TROUBLESHOOTING
WARNING DANGER
Fuel vapors are extremely flammable and may cause fire and/or explosion. Never test for ignition spark by grounding
spark plug near cylinder plug hole, otherwise serious personal injury may result.