Echo PB-750 User manual

Power Blower
Operator'sManual
MODEL PB-750
Serial Number 05001001 - 05999999
WARNING DANGER
Readrulesforsafeoperationandallinstructionscarefully. ECHOprovidesthisOperator's
Manualwhichmustbereadandunderstoodforproperandsafeoperation.
X750004870
09/02
X7501127400

2
TABLE OF CONTENTS
Introduction ...............................................................2
- The Operator's Manual .......................................2
Manual Safety Symbols and Important Information ..3
Safety .........................................................................3
- Decals .................................................................3
- InternationalSymbols.........................................4
Safety Instructions ....................................................4
- Personal Condition and Safety Equipment .........4
- ExtendedOperation/ExtremeConditions ............5
- Equipment ...........................................................5
- SafeOperation ....................................................6
EmissionControl........................................................6
Description ................................................................7
- Contents .............................................................7
Specifications.............................................................9
Assembly ................................................................. 10
- InstallBlowerPipes .......................................... 10
Pre-Operation ........................................................... 11
- Fuel ................................................................... 11
Operation ................................................................. 12
- StartingColdEngine ......................................... 12
- StartingWarmEngine ....................................... 13
- Stopping Engine ............................................... 13
- OperatingBlower .............................................. 14
Maintenance ............................................................ 15
- SkillLevels ........................................................ 15
- Maintenance Intervals ...................................... 15
- AirFilter............................................................ 16
- FuelFilter .......................................................... 16
- SparkPlug......................................................... 17
- CoolingSystem................................................. 17
- ExhaustSystem................................................. 18
- Carburetor Adjustment ..................................... 19
Troubleshooting ...................................................... 21
Storage..................................................................... 22
ServicingInformation............................................... 24
- Parts.................................................................. 24
- Service .............................................................. 24
- ECHOConsumerProductSupport.................... 24
- Warranty Registration ...................................... 24
- Additional or Replacement Manuals ................ 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© 2002 By Echo, Incorporated
All Rights Reserved.

3
POWER BLOWER
OPERATOR'SMANUAL
IMPORTANT
NOTE
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 Theenclosed message
provides information necessary for the
protection of the unit.
NOTE This enclosed message provides tips for
use, care and maintenance of the unit.
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
orderedfromyourECHOdealer. SeePARTSORDERINGinstructions
forspecificinformation.
Hot Decal (near muffler)
General Warning Decal (located on blower housing)
P/N89016006361
P/N89016009461
71 Category III
dB(A)
Measured at 50 ft. (15m) per ANSI B175.2

4
INTERNATIONAL SYMBOLS
SAFETYINSTRUCTIONS
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.
Physical Condition --
Your judgment and physical dexterity may not be good:
• if you are tired or sick,
•ifyou 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 blower.
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 face mask to protect against dust.
Hearing Protection --
ECHOrecommendswearinghearingprotectionwhenever
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 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
arecooler.
SYMBOL
Carburetor
Adjustment
-Idlespeed
Carburetor
Adjustment
-Highspeed
mixture
Emergency
Stop
Carburetor
adjustment
-Low speed
mixture
Ignition
ON/OFF Primer
Bulb
Choke Control
"Cold Start"
Position
(ChokeClosed)
Choke Control
"Run"
Position
(ChokeOpen)
DESCRIPTION SYMBOL DESCRIPTION
Hot
Surface
Read and under-
stand Operator's
Manual.
Weareyes,ears
andhead
protection
Fueland oil
mixture
Finger
Severing
Safety/Alert
Wearhand
protection.Use
twohanded.
DONOTsmoke
nearfuel.
DONOT allow
flamesorsparks
nearfuel.
Wearslip
resistantfoot
wear.
SYMBOL DESCRIPTION SYMBOL DESCRIPTION

5
POWER BLOWER
OPERATOR'SMANUAL
EXTENDED OPERATION/EXTREME CONDITIONS
Vibration and Cold --
It is believed that a condition called Raynaud’s Phenomenon, which
affects the fingers of certain individual 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
recommendedbecause the minimumexposure which mighttriggerthe
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 blower 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.
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.
• Keep exhaust area clear of flammable debris. Avoid contact during
andimmediatelyafteroperation.
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.
• Takeperiodicbreakstominimizerepeti-
tion and rest your hands.
• Reduce the speed and force with which
you do the repetitive movement.
• Do exercises to strengthen the hand and
armmuscles.
• 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
likelypermanentnerveand muscle
damage can be prevented.

6
IMPORTANTENGINEINFORMATION
ENGINE FAMILY: 1EHXS.0635RA
DISPLACEMENT: 63.3 CC
THIS ENGINE MEETS U.S. EPA PH2 AND 2000 AND
LATER CALIFORNIA EMISSION REGULATIONS FOR
S.O.R.E. REFER TO OWNER'S MANUAL FOR
MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.
SAFE OPERATION
Determine Operation Area --
• Review area to be cleared. Look for potential hazards
such as stones or metal objects.
• Spectators and fellow workers must be warned, and
children and animals prevented from coming nearer than
15m (50ft.) whilethe bloweris inuse.
• Take wind conditions into account: avoid open doors
and windows.
• Provide all operators of this equipment with the
Operator's Manual and instructions for safe operation.
• Do not point blower at people or animals.
• Start unit on ground with throttle at idle. Check that
blower pipe is not blocked by the ground or by any
objects.
WARNING DANGER
Do not operate this product indoors or in inad-
equately ventilated areas. Engine exhaust contains
poisonous emissions and can cause serious injury or
death.
KeepAFirmGrip
• Hold handle with fingers together encircling the handle.
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 perform Maintenance or Assembly procedures
with engine running.
NoiseControl
• Follow local noise regulations on sound levels and
hours of operations. Use only during appropriate hours.
• Never use a higher speed setting then necessary to
perform a task. The higher the engine speed the louder
the blower noise.
• Be a good neighbor.
AvoidHotSurfaces
• Duringoperation,themufflerorcatalyticmufflerand
surrounding cover may become extremely hot. Avoid
contact during and immediately after operation. Always
keepexhaust areaclear offlammabledebris. Allowthe
engineand muffler to completely cool before performing
any maintenance activity.
EMISSION CONTROL
California Tier 2/EPA Phase 1
The emission control system for this engine is EM (Engine Modification with catalyst).
PRODUCT EMISSION DURABILITY
The 300 hour emission durability 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.
AnEmissionControlLabelis locatedon theunit. (This isan EXAMPLEONLY, informationon labelvaries byengine
FAMILY).

7
POWER BLOWER
OPERATOR'SMANUAL
DESCRIPTION
CONTENTS
1 - PowerHead
1 - FlexPipe
1 - Pipew/swivel
1 - StraightPipe
1 - StraightPipe
1 - Operator's Manual
1 - Warranty Registration Card
1 - ECHOEmissions andWarranty Statement
1 - PlasticBag
2-Clamps w/screws
1-CableClamp
1 - BottleECHO2-StrokeOilMix
4
8
9
10
11 12
13
14
5
6
7
15
2
1
3
16
17

8
1. AIRCLEANER-Containsreplaceableairfilterelement.
2. SPARKPLUG-Providessparktoignitefuelmixture.
3. SAFETYDECAL-Listsimportantsafetyprecautions.
4. SPARKARRESTOR-CATALYTICMUFFLER/MUFFLER-Themufflerorcatalyticmufflercontrolsexhaustnoise
and emission. The spark arrestor screen prevents hot, glowing particles of carbon from leaving the muffler. Keep
exhaustareaclearofflammabledebris.
5. CHOKE - Move lever up to "Cold Start" starting position and for emergency stopping. Move lever down to run
position.
6. PRIMERBULB-Pumpingprimerbulbbeforestartingenginedrawsfreshfuelfrom thefueltank,priming thecarbure-
tor for starting. Pump primer bulb until fuel is visible and flows freely in the clear fuel tank return line. Pump bulb an
additional4or5times.
7. RECOILSTARTERHANDLE-Pullrecoilhandleslowlyuntilstarterengages,thenquicklyandfirmly. Whenengine
starts, return handle slowly. DO NOT let handle snap back or damage to unit will occur.
8. FUELTANK-Containsfuelandfuelfilter.
9. FUELTANKCAP-Coversandsealsfueltank.
10. SHOULDER HARNESS - Used to support unit on operator's back. The straps are adjustable.
11. HANDLE- Used by operator todirectand control air flow.
12. STOP SWITCH - Slide switch mounted on top of handle. Move forward to run, back to stop.
13. THROTTLETRIGGER-Springloadedtoreturntoidlewhenreleased.Duringacceleration,presstriggergradually
for best operating technique.
14. LOCKINGKNOB-Allowsoperator toadjust handlepositionfor optimumcomfort and control.
15. BLOWERPIPES-Twistlockdesign.
16. FLEXIBLEPIPE-Allowsforfullrangeofmovement.
17. THROTTLEPOSITIONLEVER-Pullbacktoincreaseenginespeed.Frictionwashersmaintainthrottleleversetting.

9
POWER BLOWER
OPERATOR'SMANUAL
SPECIFICATIONS
MODEL ----------------------------------------------- PB-750
Length------------------------------------------------- 375mm(14.76in.)
Width-------------------------------------------------- 470mm (18.5in.)
Height ------------------------------------------------- 527mm(20.75in.)
Weight (dry) ------------------------------------------ 11.4 kg(25.1lb.)
Engine Type ------------------------------------------ Air cooled, two-stroke, single cylinder gasoline engine
Displacement ----------------------------------------- 63.3cc(3.86cu.in.)
Bore---------------------------------------------------- 48.0mm(1.89in.)
Stroke-------------------------------------------------- 35.0mm(1.38in.)
Carburetor -------------------------------------------- WalbroDiaphragm,modelWYKw/primerbulb
Ignition System -------------------------------------- Flywheel Magneto, capacitor discharge ignition type
SparkPlug -------------------------------------------- NGKBPM-8YGap0.65mm(0.026in.)
ExhaustSystem -------------------------------------- SparkArrestorMuffler
Fuel ---------------------------------------------------- Mixed(GasolineandTwo-strokeOil)
Fuel/OilRatio ----------------------------------------- 50:1ECHOHighPerformance,two-strokeaircooledengineoil
Gasoline ----------------------------------------------- 89 Octane unleaded. DO NOT use fuel containing methyl alcohol, more
than10% ethylalcohol or15%MTBE.
Oil ------------------------------------------------------ 50:1ECHOHighPerformance,two-strokeaircooledengineoil
FuelTankCapacity ---------------------------------- 2.07lit.(70.0USfl.oz.)
RecoilStarterSystem -------------------------------- AutomaticRecoilStarterCentrifugalType
Idle Speed--------------------------------------------- 2400-3200 (RPM)
Wide Open Throttle Speed ------------------------- 6800-7300 (RPM)
MaximumAirSpeed
(Measured at pipe end) ----------------------------- 338KM/H (210mph)
AverageAirVolume
(Measured at pipe end) ----------------------------- 18.1cu.m/min.(640cu.ft./min.)
MaximumAirVolume
(Measured at housing) ------------------------------ 34.0cu.m/min.(1200cu.ft./min.)
Sound Level at 50 ft. dB(A) scale
perANSIB175.2 ------------------------------------- 71dB(A)

10
ASSEMBLY
WARNING DANGER
Never perform maintenance or assembly procedures with engine
running or serious personal injury may result.
INSTALL BLOWER PIPES
1. Assemble clamps (A) onto both ends of flexible pipe (B).
2. Assemble straightpipewithswivel (C)intoflexiblepipe(B).
3. Position throttle linkage so cable passes between the elbow (G)
and frame and runs along the top of the flexible pipe. Remove clamp
screw (D) on handle (E). Spread clamp and install onto straight pipe
withswivel(C).
4. Assembleflexiblepipe(B)toelbow(G)onblower.
NOTE
A light lubricant may be used to ease assembly of flexible pipe to
blowerelbow.
5. Tighten clamps (A).
6. Install throttle wire ties in second groove (F) at each end of flexible
pipe.
7. Move handle (E) to desired position. Tighten knob (H) hand tight
and tighten clamp screw (D).
8. Assemble straight pipe (J) to pipe with swivel (C), turning straight
pipe counter-clockwise to lock in place. Assemble straight pipe (K)
to straight pipe (J) the same way.
9. Make sure all clamps are tight.
BC
D
A
G
A
B
A
G
F
E
JC
K
H
D
E

11
POWER BLOWER
OPERATOR'SMANUAL
PRE-OPERATION
FUEL
Fuel Requirements
Gasoline- Use 89Octane [R+M/2 ](midgrade or higher)gasoline
known to be good quality. Gasoline may contain up to 15% MTBE
(methyltertiary-butylether). Gasohol containing methyl (wood) alcohol
is NOT approved.
TwoStrokeOil-Atwo-strokeengineoilmeetingISO-L-EGD(ISO/CD
13738)and J.A.S.O.FCStandards,must beused. EchobrandPremium
50:1 oil meets these standards. Engine problems due to inadequate
lubricationcausedbyfailuretousean ISO-L-EGDand J.A.S.O.FC
certifiedoil,suchasEchoPremium50:1Two-strokeOil,willvoidthe
two-stroke engine warranty. (Emission related parts only are covered
for two years, regardless of two-stroke oil used, per the statement listed
intheEmissionDefectWarrantyExplanation.)
IMPORTANT
EchoPremium2-StrokeOilmaybemixedat50:1ratioforapplica-
tion in all Echo engines sold in the past regardless of ratio
specified in those manuals.
Mixing Instructions
1. Fill an approved fuel container with half of the required amount of
gasoline.
2. Add 2-stroke oil to gasoline.
3. Close container and shake to mix oil with gasoline.
4. Addremaininggasolineandremix.
5. Install fuel container cap and wipe any spilled fuel from container
and surrounding area.
Handling Fuel
WARNING DANGER
FuelisVERYflammable.Useextremecarewhenmixing,storingor
handling or serious personal injury may result.
• Use an approved fuel container.
• DONOTsmokenearfuel.
• DONOT allowflames orsparksnear fuel.
• Fuel tanks/cans may be under pressure. Always loosen fuel
caps slowly allowing pressure to equalize.
• NEVERrefuel aunit whenthe engineis HOT!
• NEVERrefuel aunit withtheengine running.
• DONOTfillfueltanksindoors.ALWAYSfillfueltanks
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.ContactyourECHOdealer
fororderinginformation.
After Refueling -
• Wipe any spilled fuel from the unit.
• Moveat least3 m(10 ft.)from refueling
location before starting.
Afteruse-
• 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.
IMPORTANT
Storedfuel ages. Donotmix more fuel
than you expect to use in thirty (30)
days, ninety (90) days when a fuel
stabilizerisadded.
Stored two-stroke fuel may separate.
ALWAYS shake fuel container thor-
oughly before each use.

12
D
OPERATION
• Provide all operators of this equipment with the Operator's Manual
and instructions for safe operation.
• Check unit for loose nuts, bolts and screws daily.
• 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 unit
firmly.
STARTING COLD ENGINE
1. Move throttle lever (A) forward to idle position.Slide stop switch
(B) forward to run position.
2. Close Choke- ColdStart.
Move choke (C) up to "Cold Start" position ( ).
3. PrimerBulb-Prime.
Pumpprimerbulb (D) until fuel is visible and flows freelyinthe
clear fuel tank return line. Pump bulb an additional 4 or 5 times.
4. Pull recoil starter handle (E) and engine should start.
5. Move choke (C) down to run position ( ), and if necessary,
restart engine.
NOTE
If engine does not start after 5 pulls, repeat cold start procedures.
NOTE
Allow engine to warm up before use.
E
C
B
A

13
POWER BLOWER
OPERATOR'SMANUAL
STARTING WARM ENGINE
1. Move throttle lever (A) forward to idle position.
2. Slide stop switch (B) forward to run position. Pull recoil starter
handle (C) and engine should start. Do not use choke (D)
NOTE
If engine does not start after 5 pulls, use cold start procedures.
STOPPING ENGINE
1. Move throttle lever (A) forward to idle position. Allow engine to
return to idle before shutting off engine.
IMPORTANT
Allow engine to return to idle before shutting off engine.
2. Move stop switch (B) to "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.
C
D
B
A
B
A

14
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. Allow the engine to warm up at a fast idle for a few minutes.
3. Use lower speed to blow dry leaves from a lawn or flower bed.
4. Additional speed may be necessary to clean grass and leaves from
walks, patios and drives.
5. 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.

15
POWER BLOWER
OPERATOR'SMANUAL
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 LEVEL
Level1= Easy to do. Most required tools come with unit.
Level2= Moderate difficulty. Some specialized tools may be 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.
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MAINTENANCE INTERVALS

16
AIR FILTER
Level1.
Tools required: 25 -50mm(1-2in.)mediumbristlepaintbrush.
Parts required: AirFilterP/N13030508360
NOTE
Cleandaily.
1. Close choke (Cold Start Position). This prevents dirt from
entering the carburetor throat when the air filter is removed.
Brushaccumulateddirt 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.
FUEL FILTER
Level1.
Tools required: Fuellinehook.200-250mm(8-10in.)lengthofwire
with one end bent into a hook. Clean rag, funnel, and
an approved fuel container.
Parts required: FuelFilter P/N13120519830
WARNING DANGER
FuelisVERYflammable.Useextremecarewhenmixing,storingor
handling.
1. Use a clean rag to remove loose dirt from around fuel cap and
emptyfuel tank.
2. Use the “fuel line hook” to pull the fuel line and filter from the
tank.
3. Remove the filter fromthe line and installthe new filter.

17
POWER BLOWER
OPERATOR'SMANUAL
SPARK PLUG
Level1.
Tools required: 3/4 in. Spark Plug deep socket, Feeler gauge
(preferablyawiregauge),
Parts Required: SparkPlug,NGKBPM-8YP/N15901019830
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.Remainingsandwilldamageengine.
3. Adjust spark plug gap by bending outer electrode.
4. Tightensparkplugto145-155kg/cm(125-135in.lb.).
COOLING SYSTEMS CLEANING
Level2.
Tools required: 25-50mm (1-2in.) mediumbristlepaintbrush, Cross
HeadScrewdriver, Pointed WoodStick.
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.
Cleaning Grill
1. Removeaccumulated debrisfrom intakegrill between backpack
frame and blower housing.
0.65 mm
(0.026 in.)

18
Cleaning Cylinder Fins
1. Remove spark plug.
2. Remove engine cover (four screws), pull cover away from engine.
3. Loosely install spark plug to prevent debris from entering engine
during cleaning.
4. Clean cylinder fins (A) to allow cooling air to pass freely.
EXHAUST SYSTEM
Spark Arrestor Screen
Level2.
Tools required: CrossHead Screwdriver
Parts Required: SparkarrestorscreenP/NA310000000
WARNING DANGER
Do not perform maintenance on engine or muffler until engine and
muffler are completely cool, otherwise serious personal injury may
result.
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 (four screws).
2. Remove spark arrestor cover (A) and spark arrestor screen (B) from
muffler. Replace screen if plugged with carbon deposits.
3. Install spark arrestor screen and cover.
4. Install spark plug and engine cover.
A
A
B

19
POWER BLOWER
OPERATOR'SMANUAL
Cylinder Exhaust Port
Level3.
IMPORTANT
The cylinder exhaust port must be inspected and cleaned of excess
carbon every 3 months or 90 hours of operation in order to maintain
this engine within the emissions durability period. ECHO strongly
recommends that you return your unit to your ECHO dealer for this
importantmaintenance service.
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 is not required for proper operation of this
engine.
Level2.
Tools required: Screwdriver,tachometer(EchoP/N99051130017)
Parts required: None.
NOTE
Do not adjust carburetor unless necessary. If you have difficultly,
seeyourECHOdealer.
BeforeAdjustment
Checkthat:
• Air filter is clean and properly installed.
• Spark arrestor screen is free of carbon.
• Blowerpipesare installed.
1. Start engine, run at idle for one minute.
2. Complete warm up by running at full throttle for 5 minutes, operat-
ing choke twice to clear air from carburetor chambers.
3. Check idle speed and reset if necessary. If a tachometer is available,
idle speed screw (A) should be set to the specifications found on
Page 8 "Specifications" of this manual. Turn idle screw (A)
clockwise to increase idle speed; counter clockwise to decrease idle
speed.
4. Use a tachometer to adjust idle speed to specifications found on
page 9.
A

20
TROUBLESHOOTING
WARNING 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.
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