Shindaiwa EB633RT Owner's manual

SHINDAIWA OWNER’S/OPERATOR’S MANUAL
EB633RT BLOWER
WARNING!
Minimize the risk of injury to yourself and others!
Read this manual and familiarize yourself with the contents. Always
wear eye and hearing protection when operating this unit.
X7531124801
03/13
English................1
Spanish.........SP_1
French..........FR_1
SHINDAIWA OWNER’S/OPERATOR’S MANUAL
EB633RT BLOWER
Part Number 82050 Rev. 6/08
Minimize the risk of injury to yourself and others!
Read this manual and familiarize yourself with the
contents. Always wear eye and hearing protection
when operating this unit.
WARNING!

2
Table of ConTenTs
Introduction................................................................2
- The Operator's Manual .......................................2
Safety .........................................................................3
Manual Safety Symbols and Important Information .3
- International Symbols.........................................3
- Personal Condition and Safety Equipment ......... 3
- Equipment...........................................................6
Emission Control .......................................................6
Description.................................................................7
Contents ....................................................................8
Assembly....................................................................9
- Install Blower Pipes............................................9
Operation..................................................................10
- Fuel ...................................................................10
- Starting Cold Engine......................................... 11
- Starting Warm Engine.......................................12
- Stopping Engine................................................12
- Operating Blower..............................................13
Maintenance.............................................................17
- Skill Levels .......................................................14
- Maintenance Intervals.......................................14
- Air Filter ...........................................................15
- Fuel Filter..........................................................16
- Spark Plug.........................................................16
- Cooling System.................................................17
- Exhaust System.................................................18
- Carburetor Adjustment......................................19
- High Altitude Operation ................................19
Troubleshooting ....................................................... 21
Storage .....................................................................22
Specications ...........................................................23
Warranty Statement..................................................24
Servicing Information ..............................................28
IMPORTANT
The information contained in these instructions
describes units available at the time of publication.
ECHO Inc. reserves the right to make changes to prod-
ucts without prior notice, and without obligation to make
alterations to units previously manufactured.
InTroduCTIon
The Shindaiwa EB633RT Blower is designed and built to deliver superior performance and reliability without compro-
mise to quality, comfort, safety, or durability. Shindaiwa high performance engines represent the leading edge of 2-cycle
engine technology, and deliver exceptionally high power at remarkably low displacement and weight. As a professional
owner/operator, you’ll soon discover why Shindaiwa is simply in a class by itself.
The operaTor'smanual
Keep it in a safe place for future reference. Contains specications and
information for safety, operation, maintenance, storage, and assembly
specic to this product.
English................1
Spanish.........SP_1
French..........FR_1
SHINDAIWA OWNER’S/OPERATOR’S MANUAL
EB633RT BLOWER
PartNumber 82050 Rev. 6/08
Minimize the risk of injury to yourself and others!
Read this manual and familiarize yourself with the
contents. Always wear eye and hearing protection
when operating this unit.
WARNING!
Copyright© 2013 By Echo, Incorporated
All Rights Reserved.

3
safeTy
manual safeTy symbols and ImporTanT InformaTIon
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.
InTernaTIonal symbols
personal CondITIon and safeTy equIpmenT
WARNING
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.
WARNING
The safety alert symbol accompanied by the word
“WARNING” calls attention to an act or condi-
tion 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.
Symbol
description/application Symbol form/shape Symbol
description/application
Symbol form/shape
Read and understand
Operator's Manual. Fuel and oil mixture
Hot
Surface
Wear eyes, ears and
head protection
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/application Symbol form/shape Symbol
description/application
Symbol form/shape
Carburetor adjustment
- Idle speed
Carburetor adjustment
- High speed mixture
Emergency stop
Carburetoradjustment
- Low speed mixture
Ignition
ON/OFF
Primer bulb
Choke Control
"Cold Start"
Position
(Choke Closed)
Choke Control
"Run"
Position
(Choke Open)
Idle Speed Fast Speed

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 CSA Z94.3
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 trans-
mission of machine vibration to your hands.
Breathing Protection
Wear a facemask to protect against dust.
Hearing Protection
Shindaiwa recommends wearing hearing protection when-
ever unit is used.
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.
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, JEWELRY,
or clothing with loose or hanging items that could
become entangled in moving parts or surrounding
growth..
Wear sturdy work shoes with nonskid soles;
• DO NOT WEAR OPEN TOED SHOES,
• DO NOT OPERATE UNIT BAREFOOTED.
Wear no-slip, heavy duty work gloves.
Keep long hair away from engine and air 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.
WARNING
The ignition components of this machine generate an electromagnetic eld 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 informa-
tion, Shindaiwa does not recommend the use of Shindaiwa products by anyone who has a pacemaker.

5
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
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
equIpmenT CheCk
WARNING
Use only Shindaiwa approved attachments. Serious injury may result from the use of a non-approved attachment
combination. ECHO, INC. will not be responsible for the failure of cutting devices, attachments or accessories which
have not been tested and approved by Shindaiwa. 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 Shindaiwa Service dealer.
• Do not use any attachment, accessory or replacement part unless it is recommended in this Operator's Manual.
WARNING
Operation of this equipment may create sparks that can start res. This unit is equipped with a spark arrestor to
prevent discharge of hot particles from the engine. Metal blade use also can create sparks if the blade strikes rocks,
metal, or other hard objects. Contact local re authorities for laws or regulations regarding re prevention require-
ments.
An Emission Control Label is located on the unit. (This is
an EXAMPLE ONLY; information on label varies by engine
FAMILY).
emIssIon ConTrol (exhausT &evaporaTIve)
EPA 2010 and Later and/or C.A.R.B. TIER III
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.
The emission control system for the engine is EM (engine
modication) and, if the second to last character of the
Engine Family on the Emission Control Information label
(sample below) is “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 emis-
sions). Evaporative emissions for California models are only
applicable to fuel tanks.

7
7
English
DESCRIPTION
Locate these 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 Shindaiwa dealer.
74 Category III
dB(A)
Measured at 50 ft. (15m) per ANSI B175.2
General Warning Decal
(located on top of blower housing)
Sound Label
(located on blower housing)
6
7
14
17
16
13
15
3
2
1
10
4
11 12
5
8
9
Hot Decal (near mufer)
12

8
8
English
AIR CLEANER - Contains replaceable air lter element.
SPARK PLUG - Provides spark to ignite fuel mixture.
SAFETY DECAL - Lists important safety precautions.
SPARK ARRESTOR - CATALYTIC MUFFLER / MUFFLER - 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.
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.
CHOKE - Move lever up to "Cold Start" ( ) starting position and for emergency stopping. Move lever down to Run
position ( ).
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 purge bulb an
additional 4 or 5 times.
FUEL TANK - Contains fuel and fuel lter.
FUEL TANK CAP - Covers and seals fuel tank.
BLOWER PIPES - Exclusive positive locking system.
THROTTLE POSITION LEVER - Pull back to increase engine speed. Friction washers maintain throttle lever setting.
STOP SWITCH - Slide switch mounted on top of handle. Move forward to run, back to stop.
SHOULDER HARNESS - Used to support unit on operator's back. The straps are adjustable.
HANDLE - Used by operator to direct and control air ow.
THROTTLE TRIGGER - Spring loaded to return to idle when released. During acceleration, press trigger gradually for
best operating technique.
LOCKING KNOB - Allows operator to adjust handle position for optimum comfort and control.
FLEXIBLE PIPE - Allows for full range of movement.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
ConTenTs
___ 1 - Power Head
___ 1 - Flex Pipe
___ 1 - Pipe w/swivel
___ 1 - Straight Pipe
___ 1 - Straight Pipe
___ 1 - Operator's Manual
___ 1 - Warranty Registration Card
___ 1 - Plastic Bag
___ 2 - Clamps w/screws
___ 1 - Guide Loop
1. AIR CLEANER - Contains replaceable air lter element.
2. SPARK PLUG - Provides spark to ignite fuel mixture.
3. SAFETY DECAL - Lists important safety precautions.
4. 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.
5. 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.
6. CHOKE - Move lever up to "Cold Start" ( ) starting position and for emergency stopping. Move lever down to
Run position ( ).
7. 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 purge
bulb an additional 4 or 5 times.
8. FUEL TANK - Contains fuel and fuel lter.
9. FUEL TANK CAP - Covers and seals fuel tank.
10. BLOWER PIPES - Exclusive positive locking system.
11. THROTTLE POSITION LEVER - Pull back to increase engine speed. Friction washers maintain throttle lever
setting.
12. STOP SWITCH - Slide switch mounted on top of handle. Move forward to run, back to stop.
13. SHOULDER HARNESS - Used to support unit on operator's back. The straps are adjustable.
14. HANDLE - Rotates downward for throttle control access. Spring loaded for exible operation.
15. THROTTLE TRIGGER - Spring loaded to return to idle when released. During acceleration, press trigger gradu-
ally for best operating technique.
16. LOCKING KNOB - Allows operator to adjust handle position for optimum comfort and control.
17. FLEXIBLE PIPE - Allows for full range of movement.
ConTenTs
___1 - Power Head
___1 - Flex Pipe
___1 - Pipe w/swivel
___1 - Straight Pipe
___1 - Straight Pipe
___1 - Operator's Manual
___1 - Emission Control Warranty Statement
___1 - Warranty Registration Card
___1 - Plastic Bag
___ 2 - Clamps w/screws
___ 1 - Guide Loop
8
English
AIR CLEANER - Contains replaceable air lter element.
SPARK PLUG - Provides spark to ignite fuel mixture.
SAFETY DECAL - Lists important safety precautions.
SPARK ARRESTOR - CATALYTIC MUFFLER / MUFFLER - 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.
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.
CHOKE - Move lever up to "Cold Start" ( ) starting position and for emergency stopping. Move lever down to Run
position ( ).
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 purge bulb an
additional 4 or 5 times.
FUEL TANK - Contains fuel and fuel lter.
FUEL TANK CAP - Covers and seals fuel tank.
BLOWER PIPES - Exclusive positive locking system.
THROTTLE POSITION LEVER - Pull back to increase engine speed. Friction washers maintain throttle lever setting.
STOP SWITCH - Slide switch mounted on top of handle. Move forward to run, back to stop.
SHOULDER HARNESS - Used to support unit on operator's back. The straps are adjustable.
HANDLE - Used by operator to direct and control air ow.
THROTTLE TRIGGER - Spring loaded to return to idle when released. During acceleration, press trigger gradually for
best operating technique.
LOCKING KNOB - Allows operator to adjust handle position for optimum comfort and control.
FLEXIBLE PIPE - Allows for full range of movement.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
ConTenTs
___ 1 - Power Head
___ 1 - Flex Pipe
___ 1 - Pipe w/swivel
___ 1 - Straight Pipe
___ 1 - Straight Pipe
___ 1 - Operator's Manual
___ 1 - Warranty Registration Card
___ 1 - Plastic Bag
___ 2 - Clamps w/screws
___ 1 - Guide Loop
8
English
AIR CLEANER - Contains replaceable air lter element.
SPARK PLUG - Provides spark to ignite fuel mixture.
SAFETY DECAL - Lists important safety precautions.
SPARK ARRESTOR - CATALYTIC MUFFLER / MUFFLER - 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.
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.
CHOKE - Move lever up to "Cold Start" ( ) starting position and for emergency stopping. Move lever down to Run
position ( ).
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 purge bulb an
additional 4 or 5 times.
FUEL TANK - Contains fuel and fuel lter.
FUEL TANK CAP - Covers and seals fuel tank.
BLOWER PIPES - Exclusive positive locking system.
THROTTLE POSITION LEVER - Pull back to increase engine speed. Friction washers maintain throttle lever setting.
STOP SWITCH - Slide switch mounted on top of handle. Move forward to run, back to stop.
SHOULDER HARNESS - Used to support unit on operator's back. The straps are adjustable.
HANDLE - Used by operator to direct and control air ow.
THROTTLE TRIGGER - Spring loaded to return to idle when released. During acceleration, press trigger gradually for
best operating technique.
LOCKING KNOB - Allows operator to adjust handle position for optimum comfort and control.
FLEXIBLE PIPE - Allows for full range of movement.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
ConTenTs
___ 1 - Power Head
___ 1 - Flex Pipe
___ 1 - Pipe w/swivel
___ 1 - Straight Pipe
___ 1 - Straight Pipe
___ 1 - Operator's Manual
___ 1 - Warranty Registration Card
___ 1 - Plastic Bag
___ 2 - Clamps w/screws
___ 1 - Guide Loop

9
9
English
WARNING
Never perform maintenance or assembly procedures with en-
gine running or serious personal injury may result.
INsTAll bloWeR pIpes
Place guide loop (G) across elbow clamp, and turn until clips fully
engage clamp band.
Assemble clamps (A) onto both ends of exible pipe (B).
NOTE
Clamp with cable guide loop (G) ts elbow end of exible pipe.
Assemble swivel pipe (C) into exible pipe (B).
NOTE
Assure throttle cable is not twisted before installing handle (E).
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.
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.
Clip throttle cable into throttle cable guide loop (G).
Move handle (E) to desired position. Tighten knob (H) hand tight.
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.
Assemble straight pipe (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.
1.
2.
3.
4.
5.
6.
7.
8.
9.
e
I
C
e
b
H
F
D
G
e
H
G
AA
b
G
C
G
Assembly

10
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.
fuel
WARNING
Alternative fuels, such as E-15 (15% ethanol), E-85 (85% ethanol) or any fuels not meeting Shindaiwa requirements
are NOT approved for use in Shindaiwa 2-stroke gasoline engines. Use of 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. 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.
For increased engine protection, Shindaiwa recommends using Shindaiwa Red ArmorTM engine oil to protect the engine
from harmful carbon build up, maintain engine performance, and increase engine life. Shindaiwa Red ArmorTM engine
oil exceeds ISO-L-EGD and J.A.S.O. M345/FD performance requirements.
IMPORTANT
Shindaiwa OneTM 2-Stroke oil or Red ArmorTM engine oil may be mixed at 50:1 ratio for application in all Shin-
daiwa engines sold in the past, regardless of ratio specied in those manuals.
IMPORTANT
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. Use of unmixed, improperly mixed, or stale fuel, may cause hard starting, poor performance,
or severe engine damage and void the product warranty. Read and follow instructions in the Long Term Storage
section of this manual.
operaTIon
WARNING
Operation of this equipment may create sparks that can start res. is unit is equipped with a spark arrestor to
prevent discharge of hot particles from the engine. Metal blade use also can create sparks if the blade strikes rocks,
metal, or other hard objects. Contact local re authorities for laws or regulations regarding re prevention require-
ments.
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.

11
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.
After use
• DO NOT store a unit with fuel in its tank. Leaks can occur. Return
unused fuel to an approved fuel storage container.
Storage - Fuel storage laws vary by locality. Contact your local govern-
ment 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 ames.
IMPORTANT
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.
IMPORTANT
Stored two-stroke fuel may separate. ALWAYS shake fuel con-
tainer thoroughly before each use.
Handling Fuel
DANGER
Fuel is VERY ammable. 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 ames 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 ll fuel tanks indoors. ALWAYS ll fuel tanks outdoors over bare ground.
• DO NOT overll 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 3m (10 ft.) from refueling location before starting the engine.
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.

12
11
English
fuel, ConTInued
After use
• DO NOT store a unit with fuel in its tank. Leaks can occur. Return
unused fuel to an approved fuel storage container.
Storage
Fuel storage laws vary by locality. Contact your local government for
the laws affecting your area. As a precaution, store fuel in an approved,
airtight container. Store in a well-ventilated, unoccupied building, away
from sparks and ames.
IMPORTANT
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.
Fuel to Oil Mix-50:1 Ratio
U.S. METRIC
GAS OIL GAS OIL
Gallons Fl.oz. Liter cc.
1 2.6 4 80
2 5.2 8 160
5 13 20 400
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 rmly.
Throttle Lever/Stop Switch
Move throttle lever (A) forward to idle position. Slide stop switch (B)
forward to run position.
Choke
Move choke (C) up to "Cold Start" position ( ).
Purge Bulb
Pump purge bulb (D) until fuel is visible and ows freely in the clear
fuel tank return line. Pump bulb an additional 4 or 5 times.
Recoil Starter
Pull recoil starter handle (E) until engine res (5 or 6 pulls maximum).
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.
1.
2.
3.
4.
5.
b
a
IMPORTANT
Stored two-stroke fuel may separate.
ALWAYS shake fuel container thoroughly
before each use.
d
C
C
e
11
English
fuel, ConTInued
After use
• DO NOT store a unit with fuel in its tank. Leaks can occur. Return
unused fuel to an approved fuel storage container.
Storage
Fuel storage laws vary by locality. Contact your local government for
the laws affecting your area. As a precaution, store fuel in an approved,
airtight container. Store in a well-ventilated, unoccupied building, away
from sparks and ames.
IMPORTANT
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.
Fuel to Oil Mix-50:1 Ratio
U.S. METRIC
GAS OIL GAS OIL
Gallons Fl.oz. Liter cc.
1 2.6 4 80
2 5.2 8 160
5 13 20 400
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 rmly.
Throttle Lever/Stop Switch
Move throttle lever (A) forward to idle position. Slide stop switch (B)
forward to run position.
Choke
Move choke (C) up to "Cold Start" position ( ).
Purge Bulb
Pump purge bulb (D) until fuel is visible and ows freely in the clear
fuel tank return line. Pump bulb an additional 4 or 5 times.
Recoil Starter
Pull recoil starter handle (E) until engine res (5 or 6 pulls maximum).
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.
1.
2.
3.
4.
5.
b
a
IMPORTANT
Stored two-stroke fuel may separate.
ALWAYS shake fuel container thoroughly
before each use.
d
C
C
e
11
English
fuel, ConTInued
After use
• DO NOT store a unit with fuel in its tank. Leaks can occur. Return
unused fuel to an approved fuel storage container.
Storage
Fuel storage laws vary by locality. Contact your local government for
the laws affecting your area. As a precaution, store fuel in an approved,
airtight container. Store in a well-ventilated, unoccupied building, away
from sparks and ames.
IMPORTANT
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.
Fuel to Oil Mix-50:1 Ratio
U.S. METRIC
GAS OIL GAS OIL
Gallons Fl.oz. Liter cc.
1 2.6 4 80
2 5.2 8 160
5 13 20 400
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 rmly.
Throttle Lever/Stop Switch
Move throttle lever (A) forward to idle position. Slide stop switch (B)
forward to run position.
Choke
Move choke (C) up to "Cold Start" position ( ).
Purge Bulb
Pump purge bulb (D) until fuel is visible and ows freely in the clear
fuel tank return line. Pump bulb an additional 4 or 5 times.
Recoil Starter
Pull recoil starter handle (E) until engine res (5 or 6 pulls maximum).
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.
1.
2.
3.
4.
5.
b
a
IMPORTANT
Stored two-stroke fuel may separate.
ALWAYS shake fuel container thoroughly
before each use.
d
C
C
e
E

13
12
English
sTarTInG
Warm
enGIne
Throttle Lever/Stop Switch
Move throttle lever (A) forward to idle position. Slide stop switch (B)
forward to run position.
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.
1.
2.
sToppInG enGIne
Throttle Trigger/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 engine off.
Stop Switch
Slide stop switch (B) to Stop position.
WarnInG
If engine does not stop when stop switch is moved to STOP position,
close choke - COLD START position - to stall engine. Have your
Shindaiwa dealer repair stop switch before using blower again.
1.
2.
b
a
b
a
C
C
e
12
English
sTarTInG Warm enGIne
Throttle Lever/Stop Switch
Move throttle lever (A) forward to idle position. Slide stop switch (B)
forward to run position.
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.
1.
2.
sToppInG enGIne
Throttle Trigger/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 engine off.
Stop Switch
Slide stop switch (B) to Stop position.
WarnInG
If engine does not stop when stop switch is moved to STOP position,
close choke - COLD START position - to stall engine. Have your
Shindaiwa dealer repair stop switch before using blower again.
1.
2.
b
a
b
a
C
C
e
12
English
sTarTInG Warm enGIne
Throttle Lever/Stop Switch
Move throttle lever (A) forward to idle position. Slide stop switch (B)
forward to run position.
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.
1.
2.
sToppInG enGIne
Throttle Trigger/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 engine off.
Stop Switch
Slide stop switch (B) to Stop position.
WarnInG
If engine does not stop when stop switch is moved to STOP position,
close choke - COLD START position - to stall engine. Have your
Shindaiwa dealer repair stop switch before using blower again.
1.
2.
b
a
b
a
C
C
e
11
English
fuel, ConTInued
After use
• DO NOT store a unit with fuel in its tank. Leaks can occur. Return
unused fuel to an approved fuel storage container.
Storage
Fuel storage laws vary by locality. Contact your local government for
the laws affecting your area. As a precaution, store fuel in an approved,
airtight container. Store in a well-ventilated, unoccupied building, away
from sparks and ames.
IMPORTANT
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.
Fuel to Oil Mix-50:1 Ratio
U.S. METRIC
GAS OIL GAS OIL
Gallons Fl.oz. Liter cc.
1 2.6 4 80
2 5.2 8 160
5 13 20 400
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 rmly.
Throttle Lever/Stop Switch
Move throttle lever (A) forward to idle position. Slide stop switch (B)
forward to run position.
Choke
Move choke (C) up to "Cold Start" position ( ).
Purge Bulb
Pump purge bulb (D) until fuel is visible and ows freely in the clear
fuel tank return line. Pump bulb an additional 4 or 5 times.
Recoil Starter
Pull recoil starter handle (E) until engine res (5 or 6 pulls maximum).
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.
1.
2.
3.
4.
5.
b
a
IMPORTANT
Stored two-stroke fuel may separate.
ALWAYS shake fuel container thoroughly
before each use.
d
C
C
e
E

14
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. 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 ower bed.
6. 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.
WARNING
Always wear safety glasses, hearing protection, a face lter 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.
operaTIng blower
A
C
IMPORTANT
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 every 40 hours of
operation.
WARNING
Engine exhaust IS HOT, and contains Carbon Monoxide (CO), a poison gas. Breathing CO can cause unconscious-
ness, serious injury, or death. Exhaust can cause serious burns. ALWAYS blow exhaust away from your face and body.

15
IMPORTANT
MAINTENANCE, REPLACEMENT OR REPAIR OF EMISSION CONTROL DEVICES AND SYSTEMS
MAY BE PERFORMED BY ANY REPAIR ESTABLISHMENT OR INDIVIDUAL, HOWEVER, WARRANTY
REPAIRS MUST BE PERFORMED BY A DEALER OR SERVICE CENTER AUTHORIZED BY ECHO COR-
PORATION THE USE OF PARTS THAT ARE NOT EQUIVALENT IN PERFORMANCE AND DURABIL-ITY
TO AUTHORIZED PARTS MAY IMPAIR THE EFFECTIVENESS OF THE EMISSION CONTROL SYS-TEM
AND MAY HAVE A BEARING ON THE OUTCOME OF A WARRANTY CLAIM
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. Wear gloves to protect hands from sharp edges and
hot surfaces.
maInTenanCe
skIll levels
Level 1 = Easy to do. Common tools may be required.
Level 2 = Moderate difculty. Some specialized tools may be required.
maInTenanCe InTervals
COMPONENT / SYSTEM MAINTENANCE
PROCEDURE
REQ'D
SKILL
LEVEL
DAILY OR
BEFORE USE
EVERY
REFUEL 3 MONTHS YEARLY
Air Filter Inspect/Clean 1I / C * R *
Choke Shutter Inspect/Clean 1I / C
Fuel Filter Inspect/Replace 1I * I / R *
Fuel Cap Gasket Inspect/Replace 1I * R *
Fuel System Inspect/Replace 1I (1) * I (1) *
Spark Plug Inspect/Clean/Replace 1I / C / R *
Cooling System Inspect/Clean 2I / C
Muffler Spark Arrestor Inspect/Clean/Replace 2I / C / R *
Cylinder Exhaust Port Inspect/Clean/Decarbon 2I / C
Recoil Starter Rope Inspect/Clean 1I / C *
Screws/Nuts/Bolts Inspect/Tighten/Replace 1I *
* All recommendations to replace are based on the finding of damage or wear during inspection.
MAINTENANCE PROCEDURE LETTER CODES: I = INSPECT, R = REPLACE, C = CLEAN
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.

16
15
English
aIr fIlTer
Level 1.
Tools required: 25 - 50mm (1 - 2 in.) cleaning brush
NOTE
Always brush dirt and debris away from air cleaner area prior to
cleaning air lter.
Brush dirt off air cleaner area. Keep dirt away from engine and air
intake grid.
Remove air lter cover. Brush dirt from inside cover and away from
edges of air lter.
Check air lter seal for tight t with air lter case.
Remove air lter from case. Use care to prevent dirt and debris from
falling into air lter case.
Inspect lter element and seal. Replace lter if any of these problems
are present:
•Air lter seal does not t tightly against case
•Air lter seal is distorted, worn, or damaged
•Air lter element has holes or other damage
•Air lter element is saturated with dirt
•Air lter element is soaked with fuel mix
If air lter is in good condition and can be cleaned and reused, lightly
brush debris from air lter element, or blow lter element clean using
low pressure (40 psi or less) compressed air directed at inside of lter.
IMPORTANT
When using compressed air, always direct air stream at inside sur-
face of lter so dust and debris will be blown out of lter. Keep air
nozzle 6 - 8 inches away from lter to prevent damage to lter.
Install air lter in case, and replace cover.
NOTICE
Actual replacement interval for air lter depends on operating con-
ditions. Operation in dustier applications requires more frequent
cleaning and replacement. Continued operation with a damaged
or excessively dirty lter will allow dirt and debris to enter engine,
and result in poor performance, rapid engine wear, and premature
engine failure.
1.
2.
3.
4.
5.
6.
7.
aIr fIlTer
Level 1.
Parts Required: Air Filter
NOTE
Always brush dirt and debris away from air cleaner area prior to
cleaning air lter.
1. Brush dirt off air cleaner area. Keep dirt away from engine and
air intake grid.
2. Remove air lter cover. Brush dirt from inside cover and away
from edges of air lter.
3. Check air lter seal for tight t with air lter case.
4. Remove air lter from case. Use care to prevent dirt and debris
from falling into air lter case.
5. Inspect lter element and seal. Replace lter if any of these prob-
lems are present:
•Air lter seal does not t tightly against case
•Air lter seal is distorted, worn, or damaged
•Air lter element has holes or other damage
•Air lter element is saturated with dirt
•Air lter element is soaked with fuel mix
6. If air lter is in good condition and can be cleaned and reused,
lightly brush debris from air lter element, or blow lter element
clean using low pressure (40 psi or less) compressed air directed
at inside of lter.
IMPORTANT
When using compressed air, always direct air stream at inside sur-
face of lter so dust and debris will be blown out of lter. Keep air
nozzle 6 - 8 inches away from lter to prevent damage to lter.
7. Install air lter in case, and replace cover.
NOTICE
Actual replacement interval for air lter depends on operating con-
ditions. Operation in dustier applications requires more frequent
cleaning and replacement. Continued operation with a damaged
or excessively dirty lter will allow dirt and debris to enter engine,
and result in poor performance, rapid engine wear, and premature
engine failure.

17
fuel fIlTer
Level 1.
Parts Required: Fuel Filter
DANGER
Fuel is VERY ammable. 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. Use the “fuel line hook” to pull the fuel line and lter from the
tank.
3. Remove the lter from the line and install the new lter.
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 certied by EPA can be used to replace
the original equipment supply hose. Fines up to $37,500 may be enforced for using an un-certied replacement part.
16
English
fuel fIlTer
Level 1.
Tools required: 200 - 250 mm (8 - 10 in.) length of wire with one end
bent into a hook, clean rag, funnel, and an approved fuel container
DANGer
Fuel is VERY ammable. Use extreme care when mixing, storing
or handling.
Use a clean rag to remove loose dirt from around fuel cap and
empty fuel tank.
Use the “fuel line hook” to pull the fuel line and lter from the tank.
Remove the lter from the line and install the new lter.
1.
2.
3.
spArk pluG
Level 1.
Tools required: 19mm Spark Plug deep socket, Feeler gauge
IMPORTANT
Use only BPMR-8Y spark plug otherwise severe engine damage
may occur.
Remove spark plug , and check for fouling, worn and rounded center
electrode.
Clean the plug or replace with a new one. DO NOT sand blast to clean.
Remaining sand will damage engine.
Adjust spark plug gap by bending outer electrode.
Tighten spark plug to 150-170 kg/cm (130-150 in. lb.).
1.
2.
3.
4. 0.65 mm
(0.026 in.)
0.65 mm
(0.026 in.)
spark plug
Level 2.
Parts Required: Spark Plug
IMPORTANT
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).

18
CoolIng sysTem
Level 2.
Parts Required: None, if you are careful.
IMPORTANT
To maintain proper engine operating temperatures, cooling air
must pass freely through the cylinder n area. This ow 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 ns is
considered “Normal Maintenance.” Any failure attributed to lack of
maintenance is not warranted.
Cleaning Grill
1. Remove accumulated debris from intake grill between backpack
frame and blower housing.
Cleaning Cylinder Fins
1. Remove spark plug lead from spark plug, and remove engine
cover.
2. Clean cylinder ns (A) to allow cooling air to pass freely.
3. Install engine cover and attach spark plug lead.
17
English
CoolInG sysTem
Level 2.
Tools required: 25 - 50mm (1 - 2 in.) cleaning brush, Cross Head
Screwdriver
Parts Required: None, if you are careful.
IMPORTANT
To maintain proper engine operating temperatures, cooling air must
pass freely through the cylinder n area. This ow 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 ns is
considered “Normal Maintenance.” Any failure attributed to lack of
maintenance is not warranted.
Cleaning Grill
Remove accumulated debris from intake grill between backpack frame
and blower housing.
Cleaning Cylinder Fins
Remove spark plug and engine cover (four screws), pull cover away
from engine.
Clean cylinder ns (A) to allow cooling air to pass freely.
Install engine cover and spark plug.
1.
1.
2.
3.
A

19
exhausT sysTem
Spark Arrestor Screen
Level 2.
Parts Required: Spark arrestor screen, Gaskets
WARNING
Do not perform maintenance on engine or mufer until engine and
mufer are completely cool, otherwise serious personal injury may
result.
IMPORTANT
Carbon deposits in mufer will cause a drop in engine output and
overheating. Spark arrestor screen must be checked periodically.
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 mufer. Replace screen if plugged with carbon
deposits.
NOTE
When cleaning carbon deposit, be careful not to damage the cata-
lytic element inside mufer.
3. Install spark arrestor screen, gaskets, and cover.
4. Install engine cover and attach spark plug lead.
18
English
eXhausT sysTem
Spark Arrestor Screen
Level 2.
Tools required: Cross Head Screwdriver
Parts Required: Spark arrestor screen, Gaskets
WaRNING
Do not perform maintenance on engine or mufer until engine
and mufer are completely cool, otherwise serious personal
injury may result.
IMPORTANT
Carbon deposits in mufer will cause a drop in engine output and
overheating. Spark arrestor screen must be checked periodically.
Remove spark plug and engine cover (four screws).
Remove spark arrestor covers (A), gaskets (B), and spark arrestor screen
(C) from mufer. Replace screen if plugged with carbon deposits.
NOTE
When cleaning carbon deposit, be careful not to damage the cata-
lytic element inside mufer.
Install spark arrestor screen and cover.
Install spark plug and engine cover.
Cylinder Exhaust Port
Level 3.
IMPORTANT
The cylinder exhaust port must be inspected and cleaned of excess
carbon every 3 months or 90 hours of operation in order to main-
tain this engine within the emissions durability period. Shindaiwa
strongly recommends that you return your unit to your Shindaiwa
dealer for this important maintenance service.
1.
2.
4.
5.
a
b
C

20
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 ad-
justed by an authorized Shindaiwa service dealer.
IMPORTANT
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.
A
B
Exhaust Port Cleaning
Level 2
Parts Required: As needed: Heat Shield
1. Remove spark plug lead from spark plug, and remove engine
cover.
2. Place piston at top dead center. Remove mufer (A) and heat
shield (B).
3. Use a wood or plastic scraping tool to clean deposits from cylin-
der exhaust port.
IMPORTANT
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.
4. Inspect heat shield, and replace if damaged.
5. Install heat shield and mufer.
6. Tighten mufer mounting bolts (or nuts) to 95-130 in•lbf
(110-150 kgf•cm).
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 to specications.