KRB650B/KRB750B/KRB750A
Back Pack Blower
Part No. 99920-2198-02
READ THIS FIRST!
For your safety, read this Owner’s Manual and understand it thoroughly before operating this POWER BLOWER.
G
eneral
A power blower is a high-speed power tool, not a toy. For your own safety and the safety of others, read and be sure you
understand all of the safety precautions contained in the Owner’s Manual before operating the power blower. Keep this
Owner’s Manual, and make it available to all persons who will be using the power blower. Periodically, review the manual
to refresh your understanding of the safety instructions contained in it.
•
Careless or improper use can cause serious injury.
Obey the safety instructions contained in this manual as well as all applicable governmental and workplace safety
standards, regulations and ordinances. Your authorized Kawasaki dealer can show you how to operate your power
blower properly.
•
High pressure of blowing air flow or small blown objects could injure eyes.
Do not direct airthe blast towards people or animals.
•
Do not allow children to operate the power blower.
Operators must have sufficient size, strength and maturity to be able to lift and operate the power blower correctly for
extended periods of use. They must also be able to read, understand and follow the safety instructions in this manual.
•
Exhaust fumes contain poisonous carbon monoxide gas.
Operate your power blower only outdoors in a well-ventilated area. Stop the engine immediately if exhaust fumes cause
you to experience symptoms of headache or nausea.
•
Gasoline is highly flammable and can be explosive under certain conditions.
Before refueling, stop the engine and allow it to cool. Do not smoke. Make sure areathe is well ventilated and free from
any source of flame or sparks, including appliances with a pilot light. Wipe up fuel spills immediately. Check for and
repair
an they fuel leaks before starting power blower.
O
perator
•
Inattention or fatigue can lead to serious injury.
Never operate the power blower under the influence of drugs or alcohol. Do not use the power blower if you are sick
or taking medication that causes drowsiness. If you get tired while using the power blower, take a break.
•
Always wear appropriate protective gear to avoid injury.
Eye protection in the form of goggles or properly fitted safety glasses must be worn. Hearing protection, such as
earplugs, should also be used. Have your hearing checked regularly. Protect your hands and feet by always wearing
heavy-duty boots and non-slip gloves when operating the power blower.
•
Loose clothing or hair can lead to injury.
Unconfined hair and loose articles of clothing such as scarves, neckties, jewelry, and so forth, can be drawn into
intake of
the
thethe power blower. Always wear sturdy close-fitting long-sleeve shirts and long pants that still allow
freedom of movement. Secure hairyour to itkeep away from blower intake.
•
Stop the engine and make sure that the
blower fan is completely stopped before cleaning, checking doing any
maintenace or working on the power blower.
•
Gasoline is highly flammable and can burn or irritate skin.
Change clothing immediately if fuel is spilled on it. Never remove fuel cap while the engine is running.
•
Be alert for signs of repetitive stress injury.
Using a power blower or any vibrating machinery over a period of time may cause numbness, burning sensations, or
other indications of injury. If you experience any such symptoms, discontinue use of the power blower and consult your
doctor.
P
ower Blower
•
Modifying the power blower may make it unsafe.
Never modify your power blower, except as advised by Kawasaki in writing. Use only Kawasaki supplied or approved
attachments and repair parts.
•
Recoil starter rope can injure you if released suddenly.
When starting the engine, grasp the recoil starter firmly by the grip. Do not grasp the starter rope itself. Always control
the rope during rewind into the
the
housing. Releasing the starter rope suddenly may allow the rope to whip around and
injure you or damage the recoil starter mechanism.
•
Proper maintenance is essential for safety.
A well-maintained power blower is safer and operates more efficiently. Regularly check power blower adjustments and
replace worn or damaged parts. A worn out or damaged muffler can emit sparks and cause a fire. Increased noise
levels can lead to hearing loss. Observe maintenance schedule in the Owner’s Manual.
•
Store power blower safely to prevent fire or equipment damage.
To avoid fuel leakage and fire hazard, always empty the fuel tank and r theun carburetor dry before storing your power
blower. Old fuel can clog the carburetor and lead to hard starting or poor running conditions. Store
your
power blower in
a dry, secure location out of the reach of children. When transporting poyour wer blower in a vehicle, take precautions
to secure it against damage from falling over and fuel spillage.
Whenever you see the symbols shown below, heed their
instructions!
Always follow safe operating and maintenance practices.
This warning symbol identifies special instruc-
tions or procedures which, if not correctly fol-
lowed, could result in personal injury, or loss of
life.
CAUTION
This caution symbol identifies special instruc-
tions or procedures which, if not strictly ob-
served, could result in damage to, or destruction
of equipment.
NOTE
This note symbol indicates points of particular interest
for more efficient and convenient operation.
WARNING
EMISSION CONTROL INFORMATION
Fuel Information
THIS ENGINE IS CERTIFIED TO OPERATE ON UNLEADED REGULAR GRADE GASOLINE ONLY.
A minimum of 87 octane of the antiknock index is recommended. The antiknock index is posted on service station
pumps in the U.S.A.
Emission Control Information
To protect the environment in which we all live, Kawasaki has incorporated exhaust emission control system
(EM) in
an
compliance with applicable regulations of the United States Environmental Protection Agency and the California
Air
Resources Board. Also, depending on when your engine was produced, it may have an assigned emissions durability
period.
* See below for the engine emissions durability period that may apply to your engine.
Exhaust Emission Control System
This system reduces the amount of pollutants discharged into the atmosphere by the exhaust of this engine. The fuel,
ignition and exhaust systems of this engine have been carefully designed and constructed to ensure an efficient engine
with low exhaust pollutant levels.
Engine Emissions Durablity Period
California All Other States
Model Year - 2000 and later Engines less than 50 cc
Durability Period - 300 hours Model Year -
-
2002 and later
Durability Period - 300 hours
Engines 50 cc and more
Model Year 2004 and later
Durability Period - 300 hours
* If your engine has an assigned emissions durability period it will be located on the certification label attached
to the engine (IMPORTANT ENGINE INFORMATION : useful life hours).
Maintenance and Warranty
Proper maintenance is necessary to ensure that your power blower will continue to have low emission levels. This
Owner’s
Manual contains those maintenance recommendations for your engine. Those items identified by the Periodic
Maintenance Chart are necessary to ensure compliance with the applicable standards.
As the owner of this power
blower
,
you have the responsibility to make sure that the recommended maintenance is
carried out according to the instructions in this Owner’s Manual at your own expense.
The Kawasaki Limited Emission Control System Warranty requires that you return your to an authorized
Kawasaki dealer for remedy under warranty. Please read the warranty carefully, and keep it valid by complying with the
owner
’s
obligations it contains.
Tampering with Emission Control System Prohibited
Federal law and California state law prohibits the following acts or the causing thereof: (1) the removal or rendering
inoperative by any person other than for purposes of maintenance, repair, or replacement, of any device or element of
design incorporated into any new engine for the purposes of emission control prior to its sale or delivery to the ultimate
purchaser or while it is in use, or (2) the use of the engine after such device or element of design has been removed or
rendered inoperative by any person.
Among those acts presumed to constitute tampering are the acts listed below.
Do not tamper with the original emission related parts.
•
Carburetor and internal parts
•
Spark plug
•
Magneto or electronic ignition system
•
Fuel Filter
•
Muffler or any internal portion of the muffler
•
Air cleaner element
ITEM Specification
Valve Clearance Not Applicable
Not Adjustable
Not Adjustable
Not Adjustable
Ignition Timing
Idle Speed 2,500 r/min (rpm)
Idle Mixture Screw
High Mixture Screw
Spark Plug Gap 0.6 0.7 mm (0.024 0.028 in.)
power blower
FOREWORD
We are pleased you have chosen the Kawasaki Power Blower.
This Owner ’s
Owner ’s Manual.
Manual is provided to aid you in the safe and reliable operation of your power blower. READ AND
To ensure a long, trouble-free life for your Power Blower, give it proper care and maintenance in accordance with
this
or by any means, electronic mechanical photocopying, recording or otherwise, without the prior written permisson of
Kawasaki Motors Corp., U.S.A. Although every possible care has been taken
to make this manual as complete and accurate
as possible, Kawasaki cannot guarantee against errors and omissions. Due
to improvements in design and performance
during production, procedures and specifications are subject to change without prior notice. Illustrations are provided for general
reference purposes, and may differ from actual product aspects and components.
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any from
KAWASAKI MOTORS Corp.,U. S. A.
2005
First Edition (1) : August 2005 (I)
UNDERSTAND IT THOROUGHLY BEFORE OPERATING YOUR POWER BLOWER.
TABLE OF CONTENTS
Specifications..............................................................................8
Assembly and Preparation .........................................................9
Dealer/Owner Assembly Parts................................................9
Assembly.................................................................................9
Fuel and Oil...........................................................................10
Operating Instructions .............................................................. 12
Location of Parts...................................................................12
Location of Labels ................................................................ 14
Starting the Engine ............................................................... 15
Warming Up..........................................................................18
Operation...............................................................................18
Stopping the Engine..............................................................21
Maintenance and Adjustment...................................................23
Periodic Maintenance Chart..................................................23
Air Filter Service....................................................................25
Fuel Filter Service.................................................................26
Spark Plug Service...............................................................27
Spark Arrester Cleaning Service ..........................................28
Storage.....................................................................................29
Troubleshooting Guide..............................................................30
Specifications
Model
KRB650B KRB750B/KRB750A
Type Backpack type Backpack type
Max. Air volume m
3
/min (CFM) 17.4 (620) 20.4 (720)
45.4 (2.78) 64.7 (3.96)
Max. Air speed m/s (MPH) 79.6 (178) 89.0 (200)
8.7 (19.1)
2.0 (67.6) 2.0 (67.6)
9.4 (20.7)
MetricLength x Width x
Height
365 x 485 x 475
(in.) (14.4 x 19.1 x 18.7)
365 x 485 x 475
(14.4 x 19.1 x 18.7)
Weight kg (lbs)
Engine
Type
Forced air cooled 2-stroke,
horizontal shaft, gasoline engine
Forced air cooled 2-stroke,
horizontal shaft, gasoline engine
Displacement ml (cu. in)
Carburetor Diaphragm type
Ignition Solid state ignition
Spark plug NGK BPMR7A
Starter Recoil starter
Diaphragm type
Solid state ignition
NGK BPMR7A
Recoil starter
Fuel Mixing ratio
50 parts of regualr unleaded
gasoline to 1 part of 2-stroke
engine oil by volume
50 parts of regualr unleaded
gasoline to 1 part of 2-stroke
engine oil by volume
Tank capacity L (fl.oz)
SPECIFICATIONS 8
Assembly and Preparation
Dealer/Owner Assembly Parts Assembly
STRAIGHT
PIPE
END
PIPE
SWIVEL
PIPE
3.2 in(
KRB750B/750A
)
3.0 in(KRB650B)
BANDS(S)
FLEXIBLE
PIPE
OPERATOR'S
MANUAL
WARRANTY
REGISTRATION CARD
KRB650B/KRB750B
GOGGLES
HIP BELT
BOX SPANNER
4.0 in
BANDS(S)
KRB750A
9 ASSEMBLY AND PREPARATION
SWIVEL PIPE
FLEXIBLE PIPE
END PIPE
FUEL TANK
BAND
ENGINE
AIR
CLEANER
RETURN PIPE
PRIMER
BULB
STRAIGHT
PIPE
THROTTLE
LEVER
BROWER
HOUSING
RECOIL STARTER
SWIVEL PIPE
FLEXIBLE PIPE
END PIPE
FUEL TANK
BAND
ENGINE
AIR
CLEANER
PRIMER
BULB
STRAIGHT
PIPE
HANDLE
BROWER
HOUSING
RECOIL STARTER
RETURN PIPE
ARM ASSEMBLY
•
Position the throttle lever assembly so that it will be
comfortable for the operator and then tighten the clamp
•
Install the straight pipes and the bent pipe (nozzle) with
a quarter turn to lock them in place.
screw firmly.
Fuel and Oil
Type:
The fuel is mixture of gasoline and oil. A 50 to 1 mixture
is recommended (50 parts gasoline to 1 part oil). Mix it
thoroughly before pouring it into the power blower fuel
tank.
CAUTION
Alcohol or "gasohol" may damage the engine.
The power blower is designed to run on a 50-to-1
mixture of regular unleaded gasoline (87 octane)
and quality TC class 2–stroke oil or JASO FC
class for air-cooled engines.
The octane rating of gasoline is a measure of its
resistance to detonation or "knocking". Use a gasoline
with an octane rating equal to or higher than that shown
in the table below. The Antiknock Index is an average of
the Research Octane No. (RON) and the Motor Octane
No. (MON). The Antiknock Index is posted on service
station pumps in the U.S.A. If the Antiknock Index is not
posted, be sure the Research Octane No. is adequate.
Minimum
Octane Rating Method
Rating
(RON
+
MON)
Antinock Index
2
87
Researc h Octane Number (RON) 91
Recommended engine oil: High quality 2-stroke air
cooled engine oil
JASO service Clasification: FC class
•
•
Connect the fixible pipe to the blower housing using a
4 inch band. Tighten the band securely.
•
Slip the throttle lever assembly over the end of the swivel
pipe and temporarily tighten the clamp screw.
•
Push the throttle cable clamp over the flexible pipe and
hang the throttle wire housing from one of its ends.
Connect the swivel pipe to the flexible pipe using a 3.2
inch (for KRB750B/750A) and 3.0 inch (for KRB650B)
band. Tighten the band securely.
HIP BAND
BACK PADSERIAL NUMBER
(BLOWER HOUSING)
SHOULDER
STRAPS
ASSEMBLY AND PREPARATION 10
NOTE
Do not use the gasoline that has been stored longer
than two months.
To ensure proper starting at low ambient temperatures,
use fresh,
Filling the Tank:
winter grade fuel.
•
Level the engine before fueling.
•
Open the fuel tank cap and fill the tank with 50:1 gas/
oil pre-mixed fuel.
•
Pour slowly to avoid "spit back” and allow air to escape
from the tank.
Recommended Mixing Ratio (50:1)
Gasoline 2 stroke oil
Gal Liter OZ mL
1 3.79 2.6 76
2 7.6 5.1 152
3 11.4 7.8 228
4 15.1 10.4 304
5 18.9 13.0 380
6 22.7 15.6 456
Pour the measured amount of 2-stroke oil into an approved
gasoline container and add the specified amount of gasoline
to the container.
Mixing:
Gasoline is highly flammable and can be explo-
sive under certain circumstances.
Never overfill the thetank so that fuel rises into
filler neck. Heat may thecause fuel to expand
and overflow through vents in thethe tank cap.
After refueling, make sure cap is closed securely.
If gasoline is spilled on engine or tank, wipe it off
immediately.
WARNING
11 ASSEMBLY AND PREPARATION
Operating Instructions
Location of Parts
A. Blower housing
B. Flexible pipe
C. Swivel pipe
D. Trigger lever assembly
E. Straight pipe
F. Nozzle
G. Handle
H. Engine assembly
A. Shoulder harnss
B. Back pad
C. Hip band
D. Throttle lever
E. Set lever with Engine switch
OPERATING INSTRUCTIONS 12
D
D
B
B
G
A
A
H
E
C
F
C
E
KRB650B/KRB750B
13 OPERATING INSTRUCTIONS
A. Blower housing
B. Flexible pipe
C. Swivel pipe
D. Handle
E. Straight pipe
F. Nozzle
G. Handle
H. Engine assembly
A. Shoulder harnss
B. Back pad
C. Hip band
D. Handle
E. Engine switch
F. Throttle lever
KRB750A
D
B
G
A
H
E
C
F
D
B
A
C
E
F
14
Location of Labels
A. Handle
B. Emission certification label
C. Warning label
A. Engine cover
B. Air filter assmbly/Carburetor
C. Recoil starter
D. Recoil starter grip
E. Priming pump
F. Fuel tank
G. Tank cap
H. Muffler (with spark arrester)
I . Spark plug/Spark plug cap
J. Choke lever
K. Serial number label
OPERATING INSTRUCTIONS
G
J
B
I
K
A
A
B
H
F
C
C
D
E
15
•
Move the throttle finger lever through its full range of
motion. It must move smoothly all the way, as shown,
without sticking or binding.
Starting the Engine
A.
B. Throttle lever
Set lever with engine switch
Checking throttle operation
•
•
Turn the set lever to the " "marked position with
"Click". (Engine switch turn to "on" condition automatically)
Move the throttle lever to a half way position and hold
the position by pressing down the set lever.
CAUTION
Engine speed can not be adjusted if the throttle
lever does not move smoothly all the way and
without binding.
OPERATING INSTRUCTIONS
•
Place the power blower on firm ground.
Starting the engine
KRB650B/KRB750B
B
A
OPERATING INSTRUCTIONS 16
A. Choke lever
B. Priming pump
The recoil starter rope can cause injury if it is
released suddenly. When starting the engine,
grasp the recoil starter firmly by the grip. Do not
grasp the starter rope itself. Always control the
rope during rewind into the housing. Releasing
the starter rope suddenly may allow the rope to
whip around and injure you or damage the recoil
starting mechanism.
WARNING
B
A
•
•
Turn the engine switch to ON position "
Set the throttle lever at 1/2 speed.
KRB750A
•
Turn the choke lever up to the full closed position.
•
Slowly push the priming pump several times until
fuel
•
comes out.
When the engine is already warm or on hot days, set
the choke lever halfway or fully open position.
The fuel that overflows by pushing the priming pump
returns to the fuel tank.
1/2 SPEED
START
STOP
17 OPERATING INSTRUCTIONS
A. Choke lever
NOTE
Should the engine fail to start, do not try to pull the recoil
starter too many times with the choke lever closed. This
will cause the fuel to flood into the cylinder and make
starting even more difficult. In this case, turn the choke
lever to the fully opened position and repeat the starting
procedure.
•
After starting, vary the engine speed a few times, to
draw out the remaining air in the carburetor.
A. Handle
B. Recoil starter grip
•
•
Hold the power blower by grasping and pushing down
the handle with your left hand.
Pull the recoil starter grip slowly to engage the starter,
then give a short, quick pull.
•
Gradually turn the choke lever down to the open
position and return the throttle lever to the idling
position. If the engine fires, but does not run
continuously, repeat the starting procedure with the
choke lever fully to the open position.
B
A
A
OPERATING INSTRUCTIONS 18
A. Idle Screw
Operation
Highly-pressurized air will blow out of the nozzle
if the engine is not idling at the proper speed
when carrying the power blower on your back.
To prevent injury, never point the nozzle at any
person or animal while the blower engine is
running.
WARNING
Warming Up
•
After allowing a few minutes warming-up period, run
the engine at the idling speed.
Idling speed is about 2,500 rpm.
CAUTION
Allow sufficient warm-up time to prevent engine
damage. The power blower should be run at idle
speed for a few minutes to allow it to warm up
before applying a load. This will allow oil to reach
all engine parts, and allow piston clearance to
reach design specifications.
•
•
Turn the idle screw counter-clockwise to decrease the
engine speed if idling speed is higer than 2,500 rpm.
Turn the idle screw clockwise to increase engine idle
speed if it does not run continuously.
A
19 OPERATING INSTRUCTIONS
•
•
•
Loosen the clamp bolt.
Settle the trigger lever assembly at a comfortable
position.
Tighten the clamp bolt firmly by hand.
A. Hip band
B. Shoulder harness
B B
A
A. Tigger lever assembly
•
This power blower is designed to allow the operator to
control engine speed and air flow direction using only
the right hand on the trigger lever assembly.
•
•
Carry the power blower on your back.
Fasten the hip band for comfortable operation.
NOTE
Proper use of the shoulder harness is important for
effective power blower operation.
A
KRB650B/KRB750B
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