X7531125702
© 5/2016 ECHO Inc.
Operator’s Manual
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.
x7722271404 / x772000164
PB-755S H/T
POWER BLOWER
Burn Hazard
The muffler or catalytic muffler and surrounding cover may
become extremely hot.
Always keep clear of exhaust and muffler area, otherwise
serious personal injury may occur.
The engine exhaust from this product contains chemicals known to the
State of California to cause cancer, birth defects or other reproductive
harm.
Users of this equipment risk injury to themselves and others
if the unit is used improperly and/or safety precautions are
not followed. ECHO provides an operator’s manual. It must
be read and understood for proper and safe operation.
Failure to do so could result in serious injury.
TABLE OF CONTENTS PB-755S H/T
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TABLE OF CONTENTS
Table of Contents .............................................................................................. 2
Introduction ....................................................................................................... 3
The Operator’s Manual .............................................................................. 3
Servicing Information ........................................................................................ 3
Parts/Serial Number .................................................................................. 3
Service....................................................................................................... 3
Echo Consumer Product Support .............................................................. 3
Product Registration .................................................................................. 4
Additional or Replacement Manuals .......................................................... 4
Safety ................................................................................................................ 4
Manual Safety Symbols and Important Information ................................... 4
International Symbols ................................................................................ 5
Personal Condition and Safety Equipment ................................................ 6
Equipment................................................................................................ 10
Emission Control (Exhaust & Evaporative) .................................................... 11
CARB And EPA Emissions Control Information....................................... 11
Description ...................................................................................................... 12
Contents.......................................................................................................... 17
Assembly......................................................................................................... 18
Install Blower Pipes/Stick Handle ........................................................... 18
Install Blower Pipes ................................................................................. 19
Operation ........................................................................................................ 21
Fuel.......................................................................................................... 21
Starting Cold Engine................................................................................ 23
Starting Warm Engine.............................................................................. 24
Stopping Engine ...................................................................................... 25
Operating Blower ..................................................................................... 26
Maintenance ................................................................................................... 27
Skill Levels ............................................................................................... 28
Maintenance Intervals.............................................................................. 28
Air Filter ................................................................................................... 30
Fuel Filter................................................................................................. 30
Spark Plug ............................................................................................... 31
Cooling System........................................................................................ 31
Exhaust System....................................................................................... 32
Carburetor Adjustment............................................................................. 34
Troubleshooting............................................................................................... 36
Storage............................................................................................................ 38
Long Term Storage (Over 30 Days) ......................................................... 38
Specifications.................................................................................................. 39
Product Registration........................................................................................ 40
Notes............................................................................................................... 42
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PB-755S H/T INTRODUCTION
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 SAFETY messages.
The Operator’s Manual
Keep it in a safe place for future reference. Contains specifications and
information for safety, operation, maintenance, storage and assembly specific to
this product. Scan QR codes throughout the operator’s manual for more
information.
SERVICING INFORMATION
Parts/Serial Number
Genuine ECHO Parts and ECHO
REPOWER™ 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 and Serial Number of
the unit with you. You can find these
numbers on the engine housing. For
future reference, write them in the space
provided below.
Model 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). Dealer information is also available on our Web Site. When presenting
your unit for Warranty service/repairs, proof of purchase is required.
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.
SAFETY PB-755S H/T
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Product Registration
To ensure trouble free warranty coverage it is important that you register your
ECHO equipment on-line at www.echo-usa.com
or by filling out the product
registration sheet included in this manual. Registering your product confirms
your warranty coverage and provides a direct link between you and ECHO if we
find it necessary to contact you.
Additional or Replacement Manuals
Replacement Operator, Safety Manuals, and Parts
Catalogs are available from your ECHO dealer or at
www.echo-usa.com or by contacting ECHO Inc., 400
Oakwood Road, Lake Zurich, IL 60047 (800-673-1558).
Always check the ECHO Web Site for updated information.
Safety Videos are available from your Echo dealer. A $5.00 shipping charge
will be required for each video.
SAFETY
Manual Safety Symbols and Important Information
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.
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.
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.
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.
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PB-755S H/T SAFETY
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.
CIRCLE AND SLASH SYMBOL
This symbol means the specific action shown is prohibited.
Ignoring these prohibitions can result in serious or fatal injury.
International Symbols
Symbol Description Symbol Description
Warning, See
Operator’s Manual
Carburetor Adjustment -
High Speed Mixture
Wear Eye, Ear and
Head Protection
Carburetor Adjustment -
Idle Speed
Wear Hand
Protection
Carburetor Adjustment -
Low Speed Mixture
Safety/Alert Emergency Stop
Hot Surface Fuel and Oil Mixture
Idle speed Fast speed
Finger severing Primer Bulb
DO NOT Allow Flames
or Sparks Near Fuel
Ignition
ON / OFF
SAFETY PB-755S H/T
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Personal Condition and Safety Equipment
Users of this product risk injury to themselves and others if the unit
is used improperly and/or safety precautions are not followed.
Proper clothing and safety gear must be worn when operating unit.
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.
DO NOT Smoke Near
Fuel
Choke Control “COLD
START” Position (Choke
Closed)
Choke Control “RUN”
Position (Choke Open)
Wear slip resistant
footwear
Keep Bystanders and Helpers
Away 15 m (50 ft.).
Symbol Description Symbol Description
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PB-755S H/T SAFETY
Eye Protection
◆ Eye protection that meets ANSI Z87.1 or CE requirements
must be worn whenever you operate the unit.
◆ For additional safety, a full-face shield may be worn over
safety glasses or goggles to provide protection from sharp
branches or flying debris.
Hand Protection
Wear sturdy, no-slip, rubber work gloves to improve your grip on the handles.
Gloves also provide protection against cuts and scratches, cold environments,
and reduce the transmission of machine vibration to your hands.
Hearing/Ear Protection
ECHO recommends wearing hearing protection whenever unit is used.
Breathing Protection
Operators who are sensitive to dust or other common airborne allergens may
need to wear a dust mask to prevent inhaling these materials while operating
unit. Dust masks can provide protection against dust, plant debris, and other
plant matter such as pollen. Make sure the mask does not impair your vision,
and replace the mask as needed to prevent air restrictions.
Proper Clothing
Wear snug-fitting, durable clothing:
• Pants should have long legs, shirts should have long sleeves.
• DO NOT WEAR SHORTS.
• DO NOT WEAR TIES, SCARVES, JEWELRY, or clothing with loose or
hanging items that could become entangled in moving parts or surrounding
growth.
• Keep clothing buttoned or zipped, and keep shirt tails tucked in.
Wear sturdy work shoes with nonskid rubber soles:
• DO NOT WEAR OPEN TOED SHOES.
• DO NOT OPERATE UNIT BAREFOOTED.
Keep long hair away from engine and air intake. Retain hair with cap or net.
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.
SAFETY PB-755S H/T
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The components of this machine generate an electromagnetic field
during operation, which may interfere with some pacemakers. To
reduce the risk of serious or fatal injury, persons with pacemakers
should consult with their physician and the pacemaker
manufacturer before operating this machine. In the absence of
such information, ECHO does not recommend
the use of this
machine by anyone who has a pacemaker.
Extended Operation / Extreme Conditions
Prolonged exposure to cold and/or vibration may result in injury.
Read and follow all safety and operation instructions to minimize
risk of injury. Failure to follow instructions may result in painful
wrist/hand/arm injuries.
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 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 physician
before further exposing yourself to cold and vibration.
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PB-755S H/T SAFETY
Repetitive Stress Injuries (RSI)
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.
All over head electrical conductors and communications wires can
have electricity flow with high voltages. This unit is not insulated
against electrical current. Never touch wires directly or indirectly,
otherwise serious injury or death may result.
Do not operate this product indoors or in inadequately ventilated
areas. Engine exhaust contains poisonous emissions and can
cause serious injury or death.
SAFETY PB-755S H/T
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Read the Manual
• Provide all users of this equipment with the Operator’s Manual for instructions
on Safe Operation.
Clear the Work Area
• Clear the area of children, bystanders, and pets. At a minimum, keep all
children, bystanders, and pets outside a 15 m (50 ft) radius; outside the 15 m
(50 ft) zone, there is still a risk of injury from thrown objects. Bystanders
should be encouraged to wear eye protection. If you are approached, stop the
engine.
• Avoid blowing debris towards people, pets, open windows, or vehicles when
using unit.
• Review area to be cleared. Look for potential hazards such as stones or
metal objects.
Keep a Firm Grip
• Hold the handle in one hand, with thumb and fingers encircling the handle.
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 during and immediately after operation.
Equipment
Use only ECHO 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.
• 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.
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PB-755S H/T EMISSION CONTROL
Moving parts can amputate fingers 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.
Periodically Check fuel system (fuel lines, vent, grommet, fuel tank,
and fuel cap) for leaks 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
authorized servicing dealer before using.
EMISSION CONTROL (EXHAUST &
EVAPORATIVE)
CARB And EPA Emissions Control Information
The emission control system for the
engine is EM (engine modification)
and, if the second to last character of
the Engine Family on the Emission
Control Information label (sample
below) is “B”, “C”, “K”, or “T”, the
emission control system is EM and
TWC (3-way catalyst). The fuel tank/
fuel line emission control system is
EVAP (evaporative emissions). Evaporative emissions for California models are
only applicable to fuel tanks.
An Emission Control Label is located
on the engine. (This is an EXAMPLE
ONLY, information on label varies by
engine FAMILY).
DESCRIPTION PB-755S H/T
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Product Emission Durability (Emission Compliance Period)
The 50 or 300 hour emission 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.
DESCRIPTION
PB-755S H
Locate the safety decal(s) on your unit. Make sure the decal(s) is legible and
that you understand and follow the instructions on it. If a decal cannot be read, a
new one can be ordered from your ECHO dealer. See PARTS ORDERING
instructions for specific information.
13
12
13
1
3
6
7
10
11
2
1
8
9
4
5
Hot Decal General Warning DecalSound Label
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PB-755S H/T DESCRIPTION
1. SPARK PLUG - Provides spark to ignite fuel mixture.
2. SAFETY DECAL - Lists important safety precautions.
3. SPARK ARRESTOR MUFFLER OR SPARK ARRESTOR MUFFLER
WITH CATALYST - The muffler controls exhaust noise and emission. The
spark arrestor screen prevents hot, glowing particles of carbon from
leaving the muffler. Keep exhaust area clear of flammable debris.
4. CHOKE - Move lever UP to close choke ( ) (starting position) and for
emergency stopping. Move DOWN to open choke ( ) (run position).
5. 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 flows freely in the clear fuel tank return line. Pump
purge bulb an additional 4 or 5 times.
6. RECOIL STARTER HANDLE - Pull recoil handle slowly until recoil starter
engages, then quickly and firmly. When engine starts, return handle slowly.
DO NOT let handle snap back or damage to unit will occur.
7. FUEL TANK - Contains fuel and fuel filter.
8. FUEL TANK CAP - Covers and seals fuel tank.
9. AIR CLEANER - Contains replaceable air filter element.
10. HANDLE - Rotates downward for throttle control access. Spring loaded for
flexible operation.
11. BLOWER PIPES - Exclusive positive locking system.
12. SHOULDER HARNESS - Used to support unit on operator's back. The
straps are adjustable.
13. THROTTLE POSITION LEVER/STOP SWITCH - Combination stop switch
and variable speed throttle lever. 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.
DESCRIPTION PB-755S H/T
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PB-755S T
Locate the safety decal(s) on your unit. Make sure the decal(s) is legible and
that you understand and follow the instructions on it. If a decal cannot be read, a
new one can be ordered from your ECHO dealer. See PARTS ORDERING
instructions for specific information.
13
14
16
15
17
2
3
8
9
6
7
1
4
5
11
12
10
Sound Label
Hot Decal
General Warning Decal
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PB-755S H/T DESCRIPTION
1. SPARK PLUG - Provides spark to ignite fuel mixture.
2. SAFETY DECAL - Lists important safety precautions.
3. SPARK ARRESTOR MUFFLER OR SPARK ARRESTOR MUFFLER
WITH CATALYST -The muffler controls exhaust noise and emission. The
spark arrestor screen prevents hot, glowing particles of carbon from
leaving the muffler. Keep exhaust area clear of flammable debris.
4. CHOKE - Move lever UP to close choke ( ) (starting position) and for
emergency stopping. Move DOWN to open choke ( ) (run position).
5. 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 flows freely in the clear fuel tank return line. Pump
purge bulb an additional 4 or 5 times.
6. RECOIL STARTER HANDLE - Pull recoil handle slowly until recoil starter
engages, then quickly and firmly. When engine starts, return handle slowly.
DO NOT let handle snap back or damage to unit will occur.
7. FUEL TANK - Contains fuel and fuel filter.
8. FUEL TANK CAP - Covers and seals fuel tank.
9. AIR CLEANER - Contains replaceable air filter element.
10. THROTTLE POSITION LEVER - Pull back to increase engine speed.
Friction washers maintain throttle lever setting.
11. STOP SWITCH - Slide switch mounted on top of handle. Move forward to
run, back to stop.
12. HANDLE - Used by operator to direct and control air flow.
13. SHOULDER HARNESS - Used to support unit on operator's back. The
straps are adjustable.
14. THROTTLE TRIGGER - Spring loaded to return to idle when released.
During acceleration, press trigger gradually for best operating technique.
15. LOCKING KNOB - Allows operator to adjust handle position for optimum
comfort and control.
16. BLOWER PIPES - Exclusive positive locking system.
17. FLEXIBLE PIPE - Allows for full range of movement.
CONTENTS PB-755S H/T
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CONTENTS
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.
PB-755S H
____ 1 - Power Head
____ 1 - Flex Pipe
____ 1 - Pipe w/Swivel
____ 1 - Straight Pipe
____ 1 - Straight Pipe
____ 1 - Operator's Manual
____ 1 - Warranty Statement
____ 2 - Clamps w/Screws
____ 1 - Stick Handle
____ 1 - Bolt 6x45 mm
____ 1 - Washer 6 mm
____ 1 - Wing Nut
PB-755S T
____ 1 - Power Head
____ 1 - Flex Pipe
____ 1 - Pipe w/Swivel
____ 1 - Straight Pipe
____ 1 - Straight Pipe
____ 1 - Operator's Manual
____ 1 - Warranty Statement
____ 2 - Clamps w/Screws
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PB-755S H/T ASSEMBLY
ASSEMBLY
PB-755S H
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. Assemble swivel pipe (C) into
flexible pipe (B) and tighten
clamp (A).
3. Assemble flexible pipe (B) to
elbow (D) on blower and
tighten clamps (A).
Note: A light lubricant may be
used to ease assembly
of flexible pipe to blower
elbow.
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 (H)
should be angled away from
operator.
7. Position stick handle (H) for
comfortable operation.
Tighten wing nut (E).
A
B
A
D
C
B
A
A
G
E
G
F
H
ASSEMBLY PB-755S H/T
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8. Assemble straight pipe (K)
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 firm. Do not
force connection.
9. Assemble straight pipe with
decal (J) to straight pipe (K)
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 reinstall according to instructions 8 & 9.
PB-755 T
Never perform maintenance or assembly procedures with engine
running or serious personal injury may result.
Install Blower Pipes
1. Assemble clamps (A) and (G)
onto both ends of flexible pipe
(B).
Note:
Clamp with cable guide
loop (G) fits elbow end of
flexible pipe.
Note: A light lubricant may be
used to ease assembly of
flexible pipe to blower
elbow.
2. Assemble flexible pipe to
elbow (D) on blower. Position
clamp with cable guide loop
(G) on outside of flexible pipe
and tighten clamp.
C
K
J
A
B
G
G
G
D
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PB-755S H/T OPERATION
Note: Hang handle freely from
blower to assure throttle
cable is not twisted
before installing handle
(E).
3. Position throttle cable along
the outside of elbow. Loosen
knob (H) on handle (E). Align
notches in handle with tabs
(F) and install onto swivel pipe
(C) past long ridges in pipe.
4. Assemble swivel pipe into
flexible pipe and tighten clamp
(A).
5. Clip throttle cable into throttle cable guide loop.
6. Move handle (E) to desired position. Tighten knob (H) hand tight.
7. Assemble straight pipe (K)
onto swivel pipe, until you feel
light resistance. Do not force
connection. Hold swivel pipe
and turn straight pipe
clockwise, engaging positive
locking channels, until
connection is firm. Do not
force connection.
8. Assemble straight pipe with
decal (J) to straight pipe as in
step 7.
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 instructions 7 & 8
.
OPERATION
Moving parts can amputate fingers 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.
H
E
C
F
C
K
J
E
OPERATION PB-755S H/T
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Operation of this equipment may create sparks that can start
fires around dry vegitation. This unit is equipped with a spark
arrestor to prevent discharge of hot particles from the
engine. Contact local fire authorities for laws or regulations
regarding fire prevention requirements.
Fuel
Diesel fuels and alternative fuels, such as E-15 (15% ethanol), E-85
(85% ethanol) or any fuels not meeting ECHO requirements are
NOT approved for use in ECHO 2-stroke gasoline engines. Use of
diesel or alternative fuels may cause performance problems, loss
of power, overheating, fuel vapor lock, and unintended machine
operation, including, but not limited to, improper clutch
engagement. Diesel or alternative fuels may also cause premature
deterioration of fuel lines, gaskets, carburetors and other engine
components.
Fuel Requirements
Gasoline - Use 89 Octane [R+M/2] (mid grade or higher) gasoline known to be
good quality. Gasoline may contain up to 10% Ethanol (grain alcohol) or 15%
MTBE (methyl tertiary-butyl ether). Gasoline containing methanol (wood
alcohol) is NOT approved. ECHO brand Power Fuel
™
is 93 octane, ethanol-free
fuel premixed with ECHO Red Armor
®
engine oil at 50:1 ratio. Use of ECHO
Power Fuel
™
is recommended to extend engine life in all air-cooled 2-stroke
and 2/4-stroke hybrid engines.
Two Stroke Oil - A two-stroke engine oil meeting ISO-L-EGD (ISO/CD 13738)
and J.A.S.O. FD
Standards must be used. Echo brand premium Power Blend
X
™
Universal 2-Stroke Oil meets these standards. Engine problems due to
inadequate lubrication caused by failure to use an ISO-L-EGD (ISO/CD 13738)
and J.A.S.O. M345-FD certified oil, such as Echo premium Power Blend X
™
,
will void the two-stroke engine warranty.
Echo premium Power Blend X
™
Universal 2-Stroke Oil may be mixed at
50:1 ratio for application in all Echo engines sold in the past regardless
of ratio specified in those manuals.
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PB-755S H/T OPERATION
Handling Fuel
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 or RUNNING!
◆ DO NOT fill fuel tanks indoors. ALWAYS fill fuel tanks
outdoors over bare ground.
◆ DO NOT overfill fuel tank. Wipe up spills immediately.
◆ 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 3 m (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.
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.
Fuel to Oil Mix – 50:1 Ratio
US Metric
Gas Oil Gas Oil
Gallons Oz. Liter CC.
12.65100
25.210200
51325500
OPERATION PB-755S H/T
22 X7531125702
© 5/2016 ECHO Inc.
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.
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.
Stored two-stroke fuel may separate. ALWAYS shake fuel container
thoroughly before each use.
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 unit firmly.
- PB-755S H
1. Throttle Lever
Move throttle position lever (A) to
IDLE DETENT position.
- PB-755S T
1. Throttle Position / Stop Switch
Button
Move throttle position lever (A)
forward to IDLE position. Slide
stop switch (B) forward to RUN
position.
PB-755S H
A
PB-755S T
B
A
X7531125702 23
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PB-755S H/T OPERATION
- PB-755S H and T
2. Choke
Move choke (C) up to COLD
START ( ) position.
3. Purge Bulb
Pump purge bulb (D) 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
Pull recoil starter handle (E) until engine fires (5 or 6 pulls maximum).
5. Choke
Move choke (C) down to RUN ( ) position, and if necessary, restart engine.
Note: If engine does not start after 5 pulls, move choke to COLD START
( ) position, and repeat steps 4 & 5.
Note: Allow engine to warm up before use.
Starting Warm Engine
The starting procedure is the same as Cold Start except DO NOT close the
choke.
- PB-755S H
1. Throttle Lever
Move throttle position lever (A) to
IDLE DETENT position.
- PB-755S T
1. Throttle Position / Stop Switch
Button
Move throttle position lever (A)
forward to IDLE position. Slide
stop switch (B) forward to RUN
position.
C
E
D
PB-755S H
A
PB-755S T
B
A
OPERATION PB-755S H/T
24 X7531125702
© 5/2016 ECHO Inc.
- PB-755S H and T
2. Recoil Starter
Pull recoil starter handle (E) and
engine should start. Do not use
choke (C).
Note: If engine does not start
after 5 pulls, use cold start
procedures.
Stopping Engine
- PB-755S H
1. Throttle Lever
Move throttle position lever (A) to
IDLE DETENT position and allow
engine to return to idle before
shutting off engine.
2. Throttle Lever
Move throttle position lever (A) to
STOP (O) position.
- PB-755S T
1. Throttle Position / Throttle
Position Lever
Release throttle trigger (C). Move
Throttle Position Lever (A)
forward to IDLE position and
allow engine to return to idle
before shutting off engine.
2. Stop Switch Button
Slide stop switch (B) to STOP position.
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 unit again.
C
E
PB-755S H
A
PB-755S T
B
A
C
X7531125702 25
© 5/2016 ECHO Inc.
PB-755S H/T OPERATION
Operating Blower
Engine exhaust IS HOT, and contains Carbon Monoxide (CO), a
poison gas. Breathing CO can cause unconsciousness, serious
injury, or death. Exhaust can cause serious burns. ALWAYS
position unit so that exhaust is directed away from your face and
body.
Always wear safety glasses, hearing protection and a face filter
mask or serious personal injury may result. Do not point the blower
pipe in the direction of people or pets.
Use reduced speed only when performing light-duty tasks or to comply
with local noise regulations. Continuous low speed operation may allow
fuel/oil residue to build-up on the piston and cause rapid build-up of
carbon on the spark arrestor screen, resulting in overheating and engine
damage. To reduce harmful build-up, run engine at wide open throttle for
at least 5 minutes every hour, and inspect/clean the spark arrestor
screen after approximately 40 hours of operation.
Read the Safety Section carefully.
To avoid engine damage due to over-revving, do not block blower pipe.
1. Use only during appropriate hours.
2. Allow the engine to warm up at a fast idle for a few minutes.
3. PB-755S H
Set engine speed with throttle
lever (A).
PB-755S H
A
MAINTENANCE PB-755S H/T
26 X7531125702
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PB-755S T
Control engine speed with
throttle trigger (C), or throttle
position lever (A). Rotate throttle
position lever forward for lower
speed, back for higher speed.
4. Use lower speed to blow dry
leaves from walks, patios and
drives.
5. Additional speed may be necessary to clean grass and leaves from a lawn
or flower bed.
6. Higher speed may be necessary to move gravel, dirt, snow, bottles or cans
from a driveway, street, parking lot or stadium.
7. Always stop unit using stop engine procedure.
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. Keep debris on your property.
Be Smart - be a good neighbor.
MAINTENANCE
Moving parts can amputate fingers 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. Allow unit to cool before
performing service. Wear gloves to protect hands from sharp
edges and hot surfaces.
Your ECHO unit is designed to provide many hours of trouble free service.
Regular scheduled maintenance will help your unit 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. Common tools may be required.
Level 2 = Moderate difficulty. Some specialized tools may be required.
PB-755S T
A
C
X7531125702 27
© 5/2016 ECHO Inc.
PB-755S H/T MAINTENANCE
ECHO offers REPOWER
TM
Maintenance Kits and Parts to make your
maintenance job easier.
Maintenance Intervals
IMPORTANT NOTE - Time intervals shown are maximum. Actual use and your
experience will determine the frequency of required maintenance.
MAINTENANCE PROCEDURE NOTES:
(1) Low evaporative fuel tanks DO NOT require regular maintenance to maintain
emission integrity.
* Replacement is recommended based on the finding of damage or wear during
inspection
COMPONENT/SYSTEM
MAINTENANCE
PROCEDURE
REQ’D
SKILL
LEVEL
Daily or Before Use
Air Filter Inspect/Clean* 1
Choke Shutter Inspect/Clean * 1
Fuel System Inspect (1) 1
Cooling System Inspect/Clean 2
Recoil Starter Rope Inspect/Clean* 1
Screws/Nuts/Bolts Inspect/Tighten/Replace* 1
Every Refuel
Fuel System Inspect (1) 1
3 Months
Air Filter Replace* 1
Fuel Filter Inspect* 1
Fuel Cap Gasket Inspect* 1
Spark Plug Inspect/Clean/Replace* 1
Muffler Spark Arrestor Inspect/Clean/Replace* 2
Cylinder Exhaust Port Inspect/Clean/Decarbon 2
Yearly
Fuel Filter Inspect/Replace* 1
Fuel Cap Gasket Replace* 1
MAINTENANCE PB-755S H/T
28 X7531125702
© 5/2016 ECHO Inc.
Air Filter
Level 1.
1. Close choke (COLD START [ ]
position). This prevents dirt from
entering the carburetor throat
when the air filter is removed.
Brush accumulated dirt from air
cleaner area.
2. Remove air filter cover (A).
Brush dirt from inside cover.
3. Remove air filter (B) and lightly
brush debris from filter. Replace
filter if it is damaged, fuel
soaked, very dirty, or the rubber
sealing edges are deformed.
4. If filter can be reused, be certain it:
• Fits tightly in the air filter cavity
• Is installed with the original side out
5. Install air filter cover.
Fuel Filter
Level 1.
Fuel is VERY flammable. Use extreme care when mixing, storing or
handling, or serious personal injury may result.
1. Use a clean rag to remove loose
dirt from around fuel cap and
empty fuel tank.
2. Pull the fuel filter (B) from the fuel
tank.
3. Remove the filter from the line and
install the new filter.
Parts Required:
REPOWER
TM
TUNE UP KIT.
Parts Required:
REPOWER
TM
TUNE UP KIT.
A
B
B
X7531125702 29
© 5/2016 ECHO Inc.
PB-755S H/T MAINTENANCE
Note: Federal EPA regulations require all model year 2012 and later
gasoline powered engines produced for sale in the United States
to be equipped with a special low permeation fuel supply hose
between the carburetor and fuel tank. When servicing model
year 2012 and later equipment, only fuel supply hoses certified
by EPA can be used to replace the original equipment supply
hose. Fines up to $37,500 may be enforced for using an un-
certified replacement part.
Spark Plug
Level 2.
Use only NGK BPM-8Y spark plug (BPMR-8Y in Canada) otherwise
severe engine damage may occur.
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 150-170 kgf • cm (130-150 in • lbf).
Cooling System
Level 2.
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.
Parts Required:
REPOWER
TM
Tune-Up Kit
Parts Required: None if you are careful.
0.65 mm (0.026 in.)
MAINTENANCE PB-755S H/T
30 X7531125702
© 5/2016 ECHO Inc.
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. Brush accumulated debris from intake grill between backpack frame and
blower housing.
Cleaning Cylinder Fins
1. Disconnect spark plug lead from
spark plug, and remove engine
cover.
2. Clean cylinder fins (A) to allow
cooling air to pass freely.
3. Install engine cover and attach
spark plug lead.
Exhaust System
Spark Arrestor Screen
Level 2.
Carbon deposits in muffler will cause a drop in engine output and
overheating. Spark arrestor screen must be checked periodically.
Parts Required: Spark Arrestor Screen, Gasket
A
X7531125702 31
© 5/2016 ECHO Inc.
PB-755S H/T MAINTENANCE
1. Remove spark plug lead from
spark plug, and remove engine
cover.
2. Remove spark arrestor covers
(A), gaskets (B), and spark
arrestor screen (C) from muffler.
Replace screen if plugged with
carbon deposits.
Note: When cleaning carbon
deposits, be careful not to
damage the catalytic
element inside muffler.
3. Install spark arrestor screen and
cover.
4. Install engine cover and attach
spark plug lead.
Exhaust Port Cleaning
Level 2.
1. Remove spark plug lead from
spark plug, and remove engine
cover.
2. Place piston at top dead center.
Remove muffler (A) and heat
shield (B).
3. Use a wood or plastic scraping
tool to clean deposits from
cylinder exhaust port.
Never use a metal tool to scrape carbon from the exhaust port. Do not
scratch the cylinder or piston when cleaning the exhaust port. Do not
allow carbon particles to enter the cylinder.
Parts Required: As needed: heat shield
A
B
C
A
B
MAINTENANCE PB-755S H/T
32 X7531125702
© 5/2016 ECHO Inc.
4. Inspect heat shield, and replace
if damaged.
5. Install heat shield and muffler.
6. Tighten muffler mounting bolts
(or nuts) to 110-150 kgf • cm
(95-130 in • lbf).
7. Install engine cover and attach
spark plug lead.
8. Start engine, and warm to
operating temperature.
9. Stop engine, and re-tighten
mounting bolts (or nuts) to specifications.
10. Install muffler cover.
Carburetor Adjustment
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 Operation
This engine has been factory adjusted to maintain satisfactory starting,
emission, and durability performance up to 1,100 feet above sea level (ASL)
(96.0 kPa). To maintain proper engine operation and emission compliance
above 1,100 feet ASL the carburetor may
need to be adjusted by an authorized
ECHO service dealer.
If the engine is adjusted for operation above 1,100 feet ASL, the
carburetor must be re-adjusted when operating the engine below 1,100
feet ASL, otherwise severe engine damage may result.
Level 2.
Note: Every unit is run at the factory and the carburetor is set in
compliance with emission regulations. Carburetor adjustments,
other than idle speed, must be performed by an authorized
ECHO dealer.
Idle Adjustment
Before adjustment make sure that:
Parts Required: None
X7531125702 33
© 5/2016 ECHO Inc.
PB-755S H/T MAINTENANCE
• Air filter is clean and properly installed.
• Spark arrestor screen and muffler are free of carbon.
• Blower pipes are installed.
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. Check idle speed and reset if
necessary. If a tachometer is
available, idle speed screw (A)
should be set to the
specifications found on
“Specifications” Page of this manual. Turn idle screw (A) clockwise to
increase idle speed; counter clockwise to decrease idle speed.
A
TROUBLESHOOTING PB-755S H/T
34 X7531125702
© 5/2016 ECHO Inc.
TROUBLESHOOTING
ENGINE PROBLEM TROUBLESHOOTING CHART
Problem Check Status Cause Remedy
Engine
cranks -
starts
hard/
doesn’t
start
Fuel at
carburetor
No fuel at
carburetor
Fuel strainer
clogged
Fuel line
clogged
Carburetor
Clean or replace
Clean or replace
See your Echo
dealer
Fuel at
cylinder
No fuel at
cylinder
Carburetor
See your Echo
dealer
Muffler wet
with fuel
Fuel Mixture
too rich
OPEN choke
Clean/replace air
filter
See your Echo
dealer
Spark at
end of plug
wire
No spark
Stop switch
OFF
Electrical prob-
lem
Interlock switch
Turn switch to
ON
See your Echo
dealer
See your Echo
dealer
Spark at
plug
No spark
Spark gap
incorrect
Covered with
carbon
Fouled with
fuel
Plug defective
Adjust to 0.65mm
(0.026 in.)
Clean or replace
Clean or replace
Replace plug
X7531125702 35
© 5/2016 ECHO Inc.
PB-755S H/T TROUBLESHOOTING
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.
Engine
runs,
but dies
or
does not
acceler-
ate
properly
Air filter Air filter dirty Normal wear Clean or replace
Fuel filter Fuel filter dirty
Contaminants/
residues in fuel
Replace
Fuel vent
Fuel vent
plugged
Contaminants/
residues in fuel
Clean or replace
Spark Plug
Plug dirty/
worn
Normal wear
Clean and adjust
or replace
Carburetor
Improper
adjustment
Vibration
See your Echo
dealer
Cooling
System
Cooling
system dirty/
plugged
Extended oper-
ation in dirty/
dusty locations
Clean
Spark
Arrestor
Screen
Spark arrestor
screen
plugged
Normal wear Replace
Engine
does not
crank
N/A N/A
Internal engine
problem
See your Echo
dealer
Engine
runs,
blower
doesn't
work or
is weak/
uneven
Blower
pipe
Pipe clogged
Build-up of
debris
Unclog
Pipe loose Vibration Tighten
Pipe
damaged
Wear/Misuse Replace
ENGINE PROBLEM TROUBLESHOOTING CHART
Problem Check Status Cause Remedy
STORAGE PB-755S H/T
36 X7531125702
© 5/2016 ECHO Inc.
STORAGE
During operation the muffler or catalytic muffler and surrounding
cover become hot. Always keep exhaust area clear of flammable
debris during transportation or when storing, otherwise serious
property damage or personal injury may result.
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.
Do not store in enclosure where fuel fumes may accumulate or
reach an open flame or spark.
2. Place the stop switch in the “OFF” position.
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 fuel tank completely. Press purge bulb 6 -7 times to remove
remaining fuel from carburetor then drain the tank again. Close choke, start
and run the engine until it stops due to lack of fuel.
7. Allow engine to cool then remove the spark plug and pour 7 cc (1/4 oz.) of
fresh, clean, two-stroke engine oil into the cylinder through the spark plug
hole.
8. Pull the recoil starter handle 2-3 times to distribute the oil inside the engine.
9. 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.
10. Install the spark plug (do not connect ignition cable).
11. Remove blower pipe assembly from unit.
X7531125702 37
© 5/2016 ECHO Inc.
PB-755S H/T SPECIFICATIONS
SPECIFICATIONS
MODEL PB-755S H PB755S T
Length 375 mm (14.8 in.)
Width 488 mm (19.0 in.)
Height 527 mm (20.8 in.)
Weight (dry) 11.9 kg (26.2 lb.)
Engine Type Air cooled, two-stroke, single cylinder gasoline engine
Bore 48.0 mm (1.89 in.)
Stroke 35.0 mm (1.38 in.)
Displacement 63.3 cc (3.86 cu. in.)
Exhaust
Spark arrestor muffler or spark arrestor muffler with
catalyst
Carburetor Diaphragm w/purge pump
Ignition System Flywheel magneto, capacitor discharge ignition type
Spark Plug NGK BPM-8Y (Gap 0.65 mm (0.026 in.))
Fuel Mixed (Gasoline and Two-stroke Oil)
Fuel/Oil Ratio
50:1 Power Blend X
TM
or ECHO Red Armor
®
ISO-L-EGD
(ISO/CD 13738) and J.A.S.O. M345- FD
, two-stroke, air-
cooled engine oil.
Gasoline
Use 89 Octane unleaded. Do not use fuel containing
methyl alcohol, more than 10% ethyl alcohol or 15%
MTBE. Do not use alternative fuels such as E-15 or E-85.
Oil
Power Blend X
TM
or ECHO Red Armor
®
Premium
Universal 2-Stroke Oil
Fuel Tank Capacity 2.0 lit. (67.7 US fl. oz.)
Starter System Automatic Recoil Starter, centrifugal type
Idle Speed 2,600 RPM
Wide Open Throttle Speed
(W.O.T.)
7,050 RPM
Average Air Speed w/pipes 87.17 m/sec (195 mph)
Maximum Air Speed w/pipes 104.16 m/sec (233 mph)
Air Volume 18.43 m
3
/min. (651 cu. ft./min.)
Sound Level at 50 ft. dB(A)
scale per ANSI B175.2
74 dB(A)
PRODUCT REGISTRATION PB-755S H/T
38 X7531125702
© 5/2016 ECHO Inc.
PRODUCT REGISTRATION
Thank you for choosing ECHO Power Equipment
Please go to http://www.echo-usa.com/Warranty/Register-Your-ECHO to
register your new product on-line. It's FAST and EASY! NOTE: your
information will never be sold or misused by ECHO, Inc. Registering your
purchase enables us to contact you in the unlikely event of a service update or
product recall, and verifies your ownership for warranty consideration.
If you do not have access to the Internet, you can complete the form below and
mail to:
ECHO Inc., Product Registration, PO Box 1139, Lake Zurich IL 60047.
X7531125702 39
© 5/2016 ECHO Inc.
PB-755S H/T PRODUCT REGISTRATION
PRODUCT REGISTRATION PB-755S H/T
40 X7531125702
© 5/2016 ECHO Inc.
X7531125702 41
© 5/2016 ECHO Inc.
PB-755S H/T PRODUCT REGISTRATION
NOTES PB-755S H/T
42 X7531125702
© 5/2016 ECHO Inc.
NOTES
X7531125702 43
© 5/2016 ECHO Inc.
PB-755S H/T NOTES
ECHO, INCORPORATED
400 Oakwood Road
Lake Zurich, IL 60047
www.echo-usa.com
(H) P43114001001/P43114999999
(T) P43214001001/P43214999999
