Echo PB-620ST User manual

Power Blower
Operator's Manual
MODEL PB-620ST
WARNING
Read rules for safe operation and all instructions carefully. ECHO provides this
Operator's Manual, which must be read and understood for proper and safe opera-
tion.
X753003741
11/09
X7531123401

2
Copyright© 2010 By Echo, Incorporated
All Rights Reserved.
t h e o p e r a t o r 'sm a n u a l
Read and understand this manual before operation. Keep it in a safe
place for future reference. It contains specications and information
for operation, starting, stopping, maintenance, storage, and assembly
specic to this product.
ta b l e o f Co n t e n t s
Introduction.................................................................... 2
- The Operator's Manual ........................................... 2
Safety ............................................................................. 3
- Manual Safety Symbols and Important Information3
- International Symbols............................................. 3
- Personal Condition and Safety Equipment ............. 3
- Equipment Check.................................................... 6
Emission Control ........................................................... 6
Description..................................................................... 7
Contents ......................................................................... 9
Assembly........................................................................ 9
- Install Blower Pipes................................................ 9
Operation...................................................................... 10
- Fuel ....................................................................... 10
- Starting Cold Engine............................................. 12
- Starting Warm Engine........................................... 13
- Stopping Engine.................................................... 13
- Operating Blower.................................................. 14
Maintenance................................................................. 15
- Skill Levels ........................................................... 15
- Maintenance Intervals........................................... 15
- Air Filter ............................................................... 16
- Fuel Filter.............................................................. 16
- Spark Plug............................................................. 17
- Cooling System..................................................... 17
- Exhaust System..................................................... 18
- Carburetor Adjustment.......................................... 20
- High Altitude Operation ..................................... 20
Troubleshooting ........................................................... 22
Storage ......................................................................... 23
Specications ............................................................... 24
Warranty Statements .................................................... 25
Servicing Information .................................................. 28
- Parts ...................................................................... 28
- Service .................................................................. 28
- ECHO Consumer Product Support....................... 28
- Warranty Registration ........................................... 28
- Additional or Replacement Manuals .................... 28
Specications, 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.
In t r o d u C t I o n
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 nd it easy to use and full of helpful operating tips and
SAFETY messages.

3
Po w e r Bl o w e r
oP e r a t o r 'sMa n u a l
I n t e r n a t I o n a l s y m b o l s
p e r s o n a l C o n d I t I o n a n d s a f e t y e q u I p m e n t
WARNING
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.
SYMBOL
Carburetor Adjust-
ment
- Idle speed
Carburetor Adjust-
ment
- High speed
mixture
Stop
Carburetoradjust-
ment
- Low speed
mixture
Ignition
ON/OFF
Purge
Bulb
Choke Control
"Cold Start"
Position
(Choke Closed)
Choke Control
"Run"
Position
(Choke Open)
DESCRIPTION SYMBOL DESCRIPTION
Hot
Surface
Read and under-
stand Operator's
Manual.
Wear eyes, ears
and head protec-
tion
Fuel and oil
mixture
Finger
Severing
Safety/Alert
Wear hand
protection. Use
two handed.
DO NOT smoke
near fuel.
DO NOT allow
ames or sparks
near fuel.
Wear slip resis-
tant foot wear.
SYMBOL DESCRIPTION SYMBOL DESCRIPTION
Idle Speed Fast Speed
sa f e t y
m a n u a l s a f e t y s y m b o l s a n d I m p o r t a n t I n f o r m a t I o n
Throughout this manual and on the product itself, you will nd safety alerts and helpful, informational messages pre-
ceded by symbols or key words. The following is an explanation of those symbols and key words and what they mean to
you.
WARNING
The safety alert symbol accompanied by the word
“WARNING” calls attention to an act or condition
which CAN lead to serious personal injury or death
if not avoided.
CIRCLE AND SLASH SYMBOL
This symbol means the specic action
shown is prohibited. Ignoring these prohi-
bitions can result in serious or fatal injury.
CAUTION
The safety alert symbol accompanied by the word
“CAUTION” calls attention to an act or condition
which may lead to minor or moderate personal
injury if not avoided.
NOTE
This enclosed message provides tips for use, care and
maintenance of the unit.
IMPORTANT
The enclosed message provides information neces-
sary for the protection of the unit.
DANGER
The safety alert symbol accompanied by the word
“DANGER” calls attention to an act or condition
which WILL lead to serious personal injury or
death if not avoided.

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 tting, durable clothing;
• Pants should have long legs, shirts with long sleeves.
• DO NOT WEAR SHORTS,
• DO NOT WEAR TIES, SCARVES, and JEWELRY.
Wear sturdy work shoes with nonskid soles:
• DO NOT WEAR OPEN TOED SHOES,
• DO NOT OPERATE UNIT BAREFOOTED.
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 ngers of certain individuals, may be
brought about by exposure to vibration and cold. Exposure to vibration and cold may cause tingling and burning sen-
sations, followed by loss of color and numbness in the ngers. 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 ll 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 ngers
followed by whitening and loss of feeling, consult your physician
before further exposing yourself to cold and vibration.

5
Po w e r Bl o w e r
oP e r a t o r 'sMa n u a l
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
animals prevented from coming nearer than 15 m (50 ft.) while
the unit is in use.
• Take wind conditions into account: avoid open doors and win-
dows.
• Do not point blower at people or animals.
Keep a Firm Grip
• Hold the front and rear handles with both hands, with thumbs and
ngers encircling the handles.
Keep a Solid Stance
• Maintain footing and balance at all times. Do not stand on slip-
pery, 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 ammable debris. Avoid contact dur-
ing and immediately after operation.
Repetitive Stress Injuries
It is believed that overusing the muscles and tendons of the ngers, 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
nger.
• 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 doc-
tor if you feel tingling, numbness, or pain in the ngers, hands,
wrists, or arms. The sooner RSI/CTS is diagnosed, the more
likely permanent nerve and muscle damage can be prevented.

6
PRODUCT EMISSION DURABILITY (EMISSION COMPLIANCE PERIOD)
The 300 hour emission compliance period is the time span selected by the manufacturer certifying the engine emis-
sions output meets applicable emissions regulations, provided that approved maintenance procedures are followed as
listed in the Maintenance Section of this manual.
e q u I p m e n t C h e C k
WARNING
Use only ECHO approved attachments. Serious injury may result from the use of a non-approved attachment com-
bination. 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.
• 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.
An Emission Control Label is located on the unit. (This is an EXAMPLE ONLY, information on label varies by engine
FAMILY).
WARNING
Moving parts can amputate ngers or cause severe injuries. Keep hands, clothing and loose objects away from all
openings.
• ALWAYS stop engine, disconnect spark plug, and make sure all moving parts have come to a complete stop
before removing obstructions, clearing debris, or servicing unit.
• DO NOT start or operate unit unless all guards and protective covers are properly assembled to unit.
• NEVER reach into any opening while the engine is running. Moving parts may not be visible through openings.
WARNING
Check fuel system for leaks due to fuel tank damage, especially if the unit is dropped. If damage or leaks are found,
do not use unit, otherwise serious personal injury or property damage may occur. Have unit repaired by an autho-
rized servicing dealer before using.
em I s s I o n Co n t r o l (e x h a u s t &e v a p o r a t I v e )
EPA 2010 and Later and/or C.A.R.B. TIER III
The emission control system for the engine is EM/TWC (Engine Modication and 3-way Catalyst) and for the fuel tank
the Control System is EVAP (Evaporative Emissions) or N (for nylon tank). Evaporative emission may be applicable to
California models only.

7
Po w e r Bl o w e r
oP e r a t o r 'sMa n u a l
Locate the safety decals on your unit. Make sure the decals are legible and that you understand and follow the instruc-
tions on them. If a decal cannot be read, a new one can be ordered from your ECHO dealer. See PARTS ORDERING
instructions for specic information.
de s C r I p t I o n
1
2
3
4
5
6
7
10
15
11
12
13
14
Hot Decal (near mufer)
P/N X505002310
P/N 89016009461
General Warning Decal (located on top of blower housing)
Return to Idle
P/N X505000950
RETURN TO IDLE
BEFORE
SHUTTING OFF
Sound Label (located on blower housing)
72 Category III
dB(A)
Measured at 50 ft. (15m) per ANSI B175.2
P/N X508000150
8
9

8
1. SAFETY DECAL - Lists important safety precautions.
2. SPARK PLUG - Provides spark to ignite fuel mixture.
3. SPARK ARRESTOR MUFFLER OR SPARK ARRESTOR MUFFLER WITH CATALYST - The mufer or
catalytic mufer controls exhaust noise and emission. The spark arrestor screen prevents hot, glowing particles of
carbon from leaving the mufer. Keep exhaust area clear of ammable debris.
4. RECOIL STARTER HANDLE - Pull recoil handle slowly until starter engages, then quickly and rmly. When
engine starts, return handle slowly. DO NOT let handle snap back, or damage to unit will occur.
5. AIR CLEANER - Contains replaceable air lter element.
6. FUEL TANK CAP - Covers and seals fuel tank.
7. SHOULDER HARNESS - Used to support unit on operator's back. The straps are adjustable.
8. CHOKE - Choke is located on the side of the air cleaner. Move choke lever to "COLD START" ( ) to close
choke for cold starting. Move choke lever to "RUN" ( ) position to open choke.
9. PURGE BULB - Pumping purge bulb before starting engine draws fresh fuel from the fuel tank, purging air from
the carburetor. Pump purge bulb until fuel is visible and ows freely in the clear fuel tank return line. Pump bulb an
additional 4 or 5 times.
10. LOCKING KNOB - Allows operator to adjust handle position for optimum comfort and control.
11. HANDLE - Used by operator to direct and control air ow.
12. COMBINATION THROTTLE POSITION /STOP SWITCH BUTTON - Controls engine speed and turns
ignition on or off. Forward position - STOP. First detent position - IDLE. Move button back to increase speed,
forward to decrease speed. Use Throttle Position Button to set and hold blower speed for continuous operation.
13. THROTTLE TRIGGER - Spring-loaded Throttle Trigger controls engine speed. Releasing Trigger returns engine
to speed setting set by Throttle Position Stop Switch Button. Always release trigger and allow engine to return to
idle before shutting off with Throttle Position Stop Switch Button. Use Throttle Trigger to vary blower speed set-
tings for intermittent operation.
14. BLOWER PIPES - Exclusive positive locking system.
15. FLEXIBLE PIPE - Allows for full range of movement.

9
Po w e r Bl o w e r
oP e r a t o r 'sMa n u a l
Co n t e n t s
____ 1 - Power Head
____ 1 - Flex Pipe
____ 1 - Pipe w/swivel
____ 1 - Straight Pipe
____ 1 - Straight Pipe w/decal
____ 1 - Operator's Manual
____ 1 - Warranty Registration Card
____ 1 - Plastic Bag
____ 2 - Clamps w/screws
____ 1 - Guide Loop
WARNING
Never perform maintenance or assembly procedures with engine
running or serious personal injury may result.
I n s t a l l b l o w e r p I p e s
1. Place guide loop (G) across elbow clamp, and turn until clips fully
engage clamp band.
2. Assemble clamps (A) onto both ends of exible pipe (B).
NOTE
Clamp with cable guide loop (G) ts elbow end of exible pipe.
3. Assemble swivel pipe (C) into exible pipe (B).
NOTE
Assure throttle cable is not twisted before installing handle (E).
4. Position cable between the elbow (D) and frame and along the top
of the exible pipe. Loosen knob (H) on handle (E). Align notch in
handle with tabs (F). Install onto swivel pipe (C) past long ridges
in pipe.
as s e m b l y
GG
E
B
H
F
D
G
AA
B
C

10
5. Assemble exible pipe (B) to elbow (D) on blower and tighten
clamps (A). Position guide loop (G) on inside (blower side) of
exible tube.
NOTE
A light lubricant may be used to ease assembly of exible pipe to
blower elbow.
6. Clip throttle cable into throttle cable guide loop (G).
7. Move handle (E) to desired position. Tighten knob (H) hand tight.
8. Assemble straight pipe (I) onto swivel pipe (C), until you feel light
resistance. Do not force connection. Hold swivel pipe and turn
straight pipe clockwise, engaging positive locking channels, until
connection is rm. Do not force connection.
9. Assemble straight pipe with decal (J) to straight pipe (I) as in step
8.
NOTE
Blower use will eventually loosen pipe connections. Exclusive
positive locking system allows pipes to be tightened. If loosening
occurs, remove two straight pipes and install according to instruc-
tions 8 & 9.
op e r a t I o n
G
EI
J
C
E
H
WARNING
Operation of this equipment may create sparks that can start res around dry vegetation. This unit is equipped with a
spark arrestor and a spark arrestor may be required. The operator should contact local re agencies for laws or regu-
lations relating to re prevention requirements.
f u e l
NOTICE: Use of unmixed, improperly mixed, or fuel older than 90 days, (stale fuel), may cause hard starting, poor
performance, or severe engine damage and void the product warranty. Read and follow instructions in the Storage
section of this manual.
WARNING
Moving parts can amputate ngers or cause severe injuries. Keep hands, clothing and loose objects away from all
openings. Always stop engine, disconnect spark plug, and make sure all moving parts have come to a complete stop
before removing obstructions, clearing debris, or servicing unit. Blower housing may contain shredder blades and
other sharp edges that can cause serious injuries if touched, even if engine is off and blades are not moving. Wear
gloves to protect hands from sharp edges and hot surfaces.