Shindaiwa M254 Owner's manual

SHINDAIWA OWNER’S/OPERATOR’S MANUAL
M254 MULTIPURPOSE
TOOL CARRIER
WARNING!
Always wear eye protection when operating
this machine. To minimize the risk of injury, read this
manual and familiarize yourself with its contents.
X7502881902
02/12

2
Introduction
The Shindaiwa H4 series of hand-held
power equipmentis designed and
built to deliver superior performance
and reliability without compromise to
quality, comfort, safety or durability.
Shindaiwa engines represent the
leading edge of high-performance
engine technology, delivering
exceptionally high power with
remarkably low displacement and
weight. As an owner/operator, you’ll
soon discover for yourself why
Shindaiwa is simply in a class by itself!
Throughout this manual are special
“attention statements”.
Attention Statements
WARNING!
A statement preceded by
the triangular attention symbol and
the word “WARNING” contains
information that should be acted
upon to prevent serious bodily
injury.
CAUTION!
A statement preceded by the word
“CAUTION” contains information
that should be acted upon to pre-
vent mechanical damage.
IMPORTANT!
A statement preceded by the word
“IMPORTANT” is one that possesses
special signicance.
NOTE:
A statement preceded by the word
“NOTE” contains information that is
handy to know and may make your job
easier.
DANGER!
A statement preceded by
the triangular attention symbol and
the word “DANGER” contains infor-
mation that should be acted upon
to prevent serious injury or death.
IMPORTANT!
The operational procedures described in this manual are intended to help you get the most from this unit as well as to
protect you and others from harm. These procedures are guidelines for safe operation under most conditions, and are not
intended to replace any safety rules and/or laws that may be in force in your area. If you have questions regarding your
Shindaiwa hand held power equipment, or if you do not understand something in this manual, contact Shindaiwa at the
address printed on the back of this Manual.
ECHO, Inc. reserves the right to
make changes to products without
prior notice, and without obligation to
make alterations to units previously
manufactured.
IMPORTANT!
The information contained in these
instructions describes units available
at the time of publication.
Operational and warning labels
Contents PAGE PAGE
PAGE
WARNING!
The engine exhaust from
this product contains chemicals
known to to cause cancer, birth
defects or other reproductive
harm.
Read and follow this manual,
make sure anyone using the unit
does likewise. Failure to do so
could result in serious personal
injury or machine failure. Keep
this manual for future reference.
Always wear a hard hat to
reduce the risk of head injuries
during operation of this machine.
In addition, always wear eye and
hearing protection. Shindaiwa
recommends wearing a face
shield as additional face and eye
protection.
Wear heavy duty, non-slip
gloves.
Safety tip shoes or boots with
non-slip sole should be worn.
Safety .................................................... 3
Product Description............................ 4
Specifications....................................... 5
Emission Control................................. 5
Assembly and adjustments................. 6
Mixing fuel........................................... 8
Filling the fuel tank ............................. 9
Starting the Engine .......................... 10
Stopping the Engine.......................... 11
Operation ........................................... 11
Maintenance ...................................... 12
Long Term Storage ........................... 17
Troubleshooting Guide .................... 18
Warranty Statement .......................... 21
WARNING: Surface can be
hot. Always wear gloves when
handling this unit.

3
Be aware of the danger of falling
debris.
This product conducts electricity.
Keep the product and/or operator
a minimum distance of 15 feet
(4.5 meters) away from electrical
sources and power lines.
Keep bystanders at least 50
feet (15 meters) away from the
operating unit to reduce the risk
of being struck by falling objects
or thrown debris.
The blades / cutting attachments
are SHARP! Handle with care.
Safety
Work Safely
Attachments for this unit operate at
very high speeds and can do serious
damage or injury if they are misused
or abused. Never allow a person without
training or instruction to operate this
unit!
Stay Alert
You must be physically and mentally fit
to operate this unit safely.
WARNING!
Never make unauthorized
attachment installations.
WARNING!
Never operate
power equipment of any
kind if you are tired or if
you are under the inuence of alco-
hol, drugs, medication or any other
substance that could affect your
ability or judgement.
WARNING!
Use Good Judgment
ALWAYS wear eye protection to
shield against thrown objects.
ALWAYS wear hearing protection
devices when operating this unit. Pro-
longed exposure to excessive noise
is fatiguing and could lead to impaired
hearing. The use of proper ear protec-
tion can reduce this potential hazard
NEVER operate the engine when trans-
porting the unit. Make sure cutter safety
guards are in place when transporting
this unit.
NEVER operate the engine indoors!
Make sure there is always good ven-
tilation. Fumes from engine exhaust
can cause serious injury or death.
ALWAYS make sure there are no
missing or loose fasteners and that
the stop switch and throttle controls
are working properly.
ALWAYS use the proper cutting tool
for the job.
ALWAYS clear your work area of
trash or hidden debris that could
be thrown back at you or toward a
bystander.
ALWAYS make sure the cutting
attachment tool is properly installed
and rmly tightened before operation.
NEVER use a cracked or warped
cutting attachment: replace it with a
serviceable one and make sure it ts
properly.
ALWAYS stop the engine immedi-
ately if it suddenly begins to vibrate
or shake. Inspect for broken, miss-
ing or improperly installed parts or
attachments.
ALWAYS keep the unit as clean as
practical. Keep it free of loose vegeta-
tion, mud, etc.
ALWAYS hold the unit rmly with both
hands when cutting or trimming, and
maintain control at all times.
ALWAYS keep the handles clean.
ALWAYS disconnect the spark plug
wire before performing any mainte-
nance work.
Before starting the engine make sure
the cutting attachment is not contact-
ing anything.
ALWAYS stop the engine immedi-
ately and check for damage if you
strike a foreign object or if the unit
becomes tangled. Do not operate
with broken or damaged equipment.
ALWAYS maintain the Multipurpose
Engine according to this owner’s
manual and follow the recom-
mended scheduled maintenance.
NEVER allow the engine to run at
high RPM without a load. Doing so
could damage the engine.
ALWAYS use genuine Shindaiwa
parts and accessories when repair-
ing or maintaining this unit.
NEVER modify or disable any of the
unit’s devices. Use only Shindaiwa
genuine parts for repairs and
maintenance.
WHEN transporting the unit in a
vehicle, tie it down securely to pre-
vent damage and fuel spillage.
NEVER permit a person without
training or instruction to repair or
operate this machine.
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 information, ECHO
does not recommend the use of ECHO products by anyone who has a pacemaker.

4
IMPORTANT!
Safety and Operation Information Labels: Make sure all information
labels are undamaged and readable. Immediately replace dam-
aged or missing information labels. New labels are available from
your local authorized Shindaiwa dealer.
Safety Labels
Product Description
Outer Tube
Grip
Handle
Throttle Trigger
Throttle
Interlock
Ignition Switch
Coupler
Spark Plug
Air cleaner
Fuel tank
Tank guard
Coupler Screw Knob
Latch
Latch protector
Using the accompanying
illustration as a guide,
familiarize yourself with this
unit and its various components.
Understanding your unit helps
ensure top performance, long
service life and safer operation.
WARNING!
Do not make unauthorized
modications or alterations to any of
these units or their components.
This label indicates the minimum distance between
front handle and rear grip per ANSI B175.3.

5
Specications
Engine Model M254
Dry weight (Including attachments) 4.5 kg / 9.9 lb.
Engine type 4-cycle, vertical cylinder, air cooled
Bore x stroke 34 x 27 mm / 1.3 x 1.1 in.
Displacement 24.5 cc / 1.5 cu. in.
Fuel/oil ratio 50:1 with *ISO-L-EGD or JASO FD class engine oil*
Carburetor type Diaphragm-type
Fuel tank capacity 590 ml / 20.0 oz.
Ignition One-piece electronic, program contolled
Spark plug* NGK CMR5H
Electrode Gap 0.6 mm / .024 in.
Torque 16.7 - 18.6 N∙m / 148-165 in • lbf
Air cleaner type Foam pre-filter; sealed felt main filter
Starting method Recoil
Stopping method Slide switch
Transmission type Automatic, centrifugal clutch w/bevel gear
Idle Speed 2,900 RPM
Clutch Engagement Speed 4,100 RPM
Wide Open Throttle Speed (W.O.T.) 9,600 RPM
Specifications are subject to change without notice.
An Emission Control Label is located on the engine. (This is an EXAMPLE ONLY; information on label varies by engine
FAMILY).
PRODUCT EMISSION DURABILITY (EMISSION COMPLIANCE PERIOD)
The 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.
Emission Control (Exhaust & Evaporative)
EPA 2010 and Later and/or C.A.R.B. TIER III
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 “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 may only be applicable to fuel tanks.

6
4 - 6 mm
Outer tube
Hex screws
Handle
Moutning
plate
Throttle assembly
Adjusting the handle
4 - 6
mm
Loosen the fasteners on the air lter cover
Adjusting throttle trigger free play
Assembly and adjustments
Prior to assembly
This Shindaiwa Multipurpose Tool Car-
rier comes fully assembled. You only
need attach the accessory tool of your
choice to the powerhead. Your Multi-
purpose tool carrier includes:
IMPORTANT!
The terms “left”, “left-hand”, and
“LH”; “right”, “right-hand”, and “RH”;
“front” and “rear” refer to directions as
viewed by the operator during normal
operation.
Throttle trigger free play
The thro ttle trigger free play should be
approximately 4 - 6 mm. Make sure that
the throttle trigger operates smoothly
without binding. If it becomes neces-
sary to adjust the trigger free play,
follow the procedures and illustrations
that follow.
1. Loosen the air cleaner cover knobs
and remove the air cleaner cover.
2. Turn the cable adjuster in or out as
required to obtain proper free play
4-6 mm (3/16-1/4 inch).
3. Reinstall the air cleaner cover.
■Operator’s manual
■Assembly Tool(s)
Handle
Your Shindaiwa Multi-Purpose Tool
Carrier comes with the handle
installed. It can be re-adjusted for oper-
ator comfort in the following manner.
1. Loosen the four hex screws..
2. Rotate/slide handle assembly to best
position for operator comfort, usually
25 cm (10 in.) ahead of the throttle
assembly.
3. Tighten hex screws in a crisscross
manner.
Cable
Adjuster

7
Assembling tube sections
1. Place powerhead/lower tube assem-
bly on a clean, flat surface so that
both assemblies fit end to end. The
powerhead/lower tube assembly
should be facing positioned with the
locking hole in the tube end facing
up.
Assembly and adjustments (continued)
2. Slip off the protective cover from the
end of the tool, and loosen the cou-
pler screw knob.
3. Insert the tool assembly into the cou-
pler, with the tool decal facing up,
until the line of the decal is flush with
the end of the coupler.
4. Twist the tool assembly back and
forth until you are sure it snaps in
place by the coupler latch.
5. When the two tube halves are locked
together, press down on the spring-
loaded latch protector and tighten
the coupler screw knob.
CAUTION!
Keep the open ends of the tubes
clean and free of debris!
CAUTION!
Verify that there is no gap between
the latch protector and coupler.
When the two tube halves are locked together, press down on the spring-loaded latch protector
Tool assembly
Lower tube assembly
Coupler
Latch
Coupler screw
knob
Locking hole
Latch protector (extended)
Latch Protector (lowered)
Coupler Screw Knob
Coupler
Insert the tool assembly into the coupler
Press latch
1. With the unit on a clean, flat surface,
loosen the coupler screw. The spring-
loaded coupler protector should pop up.
2. Press down on the latch with your finger
or thumb. This releases the coupler lock.
3. Pull the upper tube assembly out of the
coupler.
Disassembling the tube sections
Press down on the latch with your nger or thumb

8
WARNING!
Alternative fuels, such as E15 (15% ethanol), E-85 (85% ethanol) or any fuels not meeting Shindaiwa
requirements are NOT approved for use in Shindaiwa 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.
Hybrid 4TM Mixture Oil - Engine oil meeting ISO-L-EGD (ISO/CD 13738) and J.A.S.O. M345/FD standards must be
used. Shindaiwa highly recommends using Shindaiwa Red ArmorTM engine oil in all Shindaiwa Hybrid 4TM engines 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. 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 certied
oil will void the engine warranty.
Mixing Fuel
Examples of 50:1 mixing quantities
IMPORTANT!
Shindaiwa Red ArmorTM engine oil may be mixed at 50:1 ratio for application
in all Shindaiwa 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.
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.

9
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 con-
tainer. Store in a well-ventilated, unoccupied building,
away from sparks and ames.
IMPORTANT!
Stored fuel may separate. ALWAYS shake fuel con-
tainer thoroughly before each use.
Mixing Instructions
1. Fill an approved fuel container with half of the re-
quired amount of gasoline.
2. Add the proper amount of engine oil to gasoline.
3. Close container and shake to mix oil with gasoline.
4. Add remaining gasoline, close fuel container, and
remix.
IMPORTANT!
Spilled fuel is a leading cause of hydrocarbon emis-
sions. 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.
1. Place the blower on a at, level
surface.
2. Clear any dirt or other debris from
around the fuel ller cap.
Filling the Fuel Tank
CAUTION!
Slowly remove the fuel cap only
after stopping the engine.
WARNING!
Minimize the Risk of Fire
■NEVER smoke or light res near
the engine.
■ALWAYS stop the engine and
allow it to cool before refueling.
■ALWAYS Wipe all spilled fuel
and move at least 3 meters (10
feet) from the fueling point and
source before starting.
■NEVER place ammable material
close to the engine mufer.
■NEVER operate the engine
without the mufer and spark
arrester screen in place and in
good working condition.
■FUEL IS HIGHLY FLAMMABLE.
■ALWAYS store gasoline in
a container approved for
ammable liquids.
■ALWAYS inspect the unit
for fuel leaks before each
use. During each rell,
check that no fuel leaks
from around the fuel cap
and/or fuel tank.
If fuel leaks are evident,
stop using the unit imme-
diately. Fuel leaks must be
repaired before using the
unit.
■ALWAYS move the unit
at least 3 meters (10 feet)
away from a fuel storage
area or other readily am-
mable materials before
starting
the engine.
3. Remove the fuel cap, and ll the
tank with clean, fresh fuel.
4. Reinstall the fuel ller cap and
tighten rmly.
5. Wipe away any spilled fuel before
starting the blower.

10
Slide ignition to ON
ON
Throttle Lock
Button
Make sure the
attachment is clear
of obstructions!
...and pull recoil
starter handle
upward
Hold
the unit
rmly...
Open
After engine starts, move choke to OPEN
position
Close
choke
Set the choke trigger to the CLOSED
position
Starting the Engine
IMPORTANT!
Engine ignition is controlled by a two position switch mounted on the throttle housing labeled, “I” for ON or START and “O” for OFF
or STOP.
1. Slide the ignition switch to the “ON”
position.
2. Set the throttle trigger to the “fast
idle”:
a. Squeeze the throttle trigger
toward the handgrip on the shaft
tube.
b. Depress and hold the throttle lock
button.
c. While depressing the throttle lock
button, release the throttle trigger.
3. Press the primer bulb until fuel can
be seen flowing in the transparent
WARNING!
Never start the engine from
the operating position.
return tube.
4. Set the choke trigger to the CLOSED
position if engine is cold.
5. While holding the outer tube firmly
with left hand. Use your other hand
to slowly pull the recoil starter han-
dle until resistance is felt, then pull
IMPORTANT!
The primer system only pushes fuel
through the carburetor. Repeatedly
pressing the primer bulb will not ood
the engine with fuel.
CAUTION!
Do not pull the recoil starter to the
end of the rope travel. Pulling the
recoil starter to the end of the rope
travel can damage the starter.
WARNING!
The cutting attachment may
move when the engine is started!
IMPORTANT!
If the engine fails to start after sev-
eral attempts with the choke in the
closed position, the engine may
be ooded with fuel. If ooding is
suspected, refer to the ”Starting
a Flooded Engine” section of this
manual.
quickly to start the engine.
6. When the engine starts, slowly move
the choke trigger to the “OPEN”
position. (If the engine stops after
the initial start, close the choke and
restart.)
7. Operating the throttle will automati-
Press primer bulb...
Primer Bulb
WARNING!
The attachment will operate immediately when the engine starts, and could result in possible serious injury. Keep mov-
able parts of the attachment away from objects that could become entangled or thrown, and surfaces that could cause
loss of control.
Throttle Trigger

11
■After the engine starts, allow the
engine to warm up at idle 2 or 3 min-
utes before operating the unit.
When the Engine Starts... ■After the engine is warm, pick up the
unit and clip on the shoulder strap, if so
equipped.
Starting A Flooded Engine
Slide ignition to OFF
OFF
Idle the engine briefly before stopping
(about 2 minutes), then slide the ignition
switch to the “O” (Engine OFF) position.
Stopping the Engine
Operation
NEVER operate the unit with the
cutting attachment shield or other
protective devices removed!
Use only authorized Shindaiwa parts
and accessories with your Shindaiwa
unit. Do not make modifications to
this unit without written approval from
Shindaiwa.
ALWAYS make sure the cutting
attachment is properly installed and
firmly tightened before operation.
NEVER use a cracked or warped cutting
attachment: replace it with a serviceable
one.
Checking Unit Condition
ALWAYS make sure the cutting attach-
ment fits properly into the appropriate
attachment holder. If a properly installed
attachment vibrates, replace the attach-
ment with new one and re-check.
ALWAYS stop the engine immediately
and check for damage if you strike a
foreign object or if the unit becomes
tangled. Do not operate with broken or
damaged equipment.
NEVER allow the engine to run at high
RPM without a load. Doing so could dam-
age the engine.
NEVER operate a unit with worn or
damaged fasteners or attachment
holders.
WARNING!
A cutting attachment shield
or other protective device is no
guarantee of protection against rico-
chet. YOU MUST ALWAYS GUARD
AGAINST FLYING DEBRIS!
1. Slide the ignition switch to the “I” (ON) position.
2. Open the choke, put the throttle trigger in the full throttle position, then clear excess fuel from the combustion chamber by
cranking the engine several times.
3. If the engine still fails to start or fire, refer to the troubleshooting flow chart at the end of this manual.
WARNING!
Moving parts can amputate ngers or cause severe injuries. Keep hands, clothing and loose objects away from
all openings. Always stop engine, disconnect spark plug, and make sure all moving parts have come to a complete stop
before removing obstructions, clearing debris, or servicing unit.
WARNING!
Engine exhaust IS HOT, and contains Carbon Monoxide (CO), a poison gas. Breathing CO can cause uncon-
sciousness, serious injury, or death. Exhaust can cause serious burns. ALWAYS position unit so that exhaust is directed
away from your face and body..
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 requirements.
■Advancing the throttle makes the cutting
attachment move faster; releasing the
throttle permits the attachment to stop
moving. If the cutting attachment con-
tinues to move when the engine returns
to idle, carburetor idle speed should be
adjusted (see “Adjusting Engine Idle”.).

12
Adjust the shoulder strap so the
shoulder pad rests comfortably on the
off-side shoulder and the cutting path
of the cutting attachment is parallel to
the ground. Make sure all hooks and
adjustment devices are secure.
Shoulder strap
NOTE:
Although a shoulder strap accessory
is not required for use with a grass
unit, a shoulder strap can increase
operator comfort during extended
periods of operation.
Maintenance
WARNING!
Before performing any main-
tenance, repair, or cleaning work on
the unit, make sure the engine and
cutting attachment are completely
stopped. Disconnect the spark plug
wire before performing service or
maintenance.
WARNING!
Non-standard accessories,
cutting attachment, or replacement
parts may not operate properly with
your unit and may cause damage and
lead to personal injury.
IMPORTANT!
MAINTENANCE, REPLACEMENT OR REPAIR OF EMISSION CONTROL DEVICES AND SYSTEMS MAY BE PER-
FORMED BY ANY REPAIR ESTABLISHMENT OR INDIVIDUAL; HOWEVER, WARRANTY REPAIRS MUST BE PER-
FORMED BY A DEALER OR SERVICE CENTER AUTHORIZED BY ECHO, INC. THE USE OF PARTS THAT ARE NOT
EQUIVALENT IN PERFORMANCE AND DURABILITY TO AUTHORIZED PARTS MAY IMPAIR THE EFFECTIVENESS OF
THE EMISSION CONTROL SYSTEM AND MAY HAVE A BEARING ON THE OUTCOME OF A WARRANTY CLAIM.
Spark Plug
Keep the spark plug and wire connec-
tions tight and clean.
Fasteners
Make sure nuts, bolts, and screws
(except carburetor adjusting screws)
are tight.
Mufer
This unit must never be operated with
a faulty or missing spark arrester or
muffler. Make sure the muffler is well
secured and in good condition. A worn
or damaged muffler is a fire hazard and
may also cause hearing loss.
General maintenance
NOTE:
Using non-standard replacement
parts could invalidate your Shindaiwa
warranty.
Air Filter
The H4 engine that powers your
Shindaiwa model is a hybrid 4-stroke
engine. As a hybrid, the engine is
lubricated by oil mixed with the gaso-
line and air from the carburetor that
moves through and around the internal
parts of the engine in a similar way
that a 2-stroke engine is lubricated.
Without the heavy duty 2-stage air
filter equipped on all H4 engines, dust
and dirt could also move through the
engine, decreasing engine life, increas-
ing valve wear and the need for more
frequent valve adjustments. To keep
your H4 engine strong and reliable,
Shindaiwa recommends that you check
and service the air filter as instructed
in the 10-Hour Maintenance.

13
Prior to each work day, perform
the following:
■Remove all dirt and debris from the
engine, check the cooling fins and
air cleaner for clogging, and clean
as necessary.
■Clean any debris or dirt from the
cutting attachment.
■Check the entire unit for leaking
fuel or grease.
■Check for loose or missing screws
or components. Make sure the cut-
ter attachment is securely fastened.
■Make sure nuts, bolts, and screws
(except carburetor idle speed
adjusting screws) are tight.
■Carefully remove any accumulations
of dirt or debris from the muffler
and fuel tank. Check cooling air
intake area at base of crankcase.
Remove all debris. Dirt build-up in
these areas can lead to engine over-
heating, fire, or premature wear.
Daily maintenance
Remove all dirt and debris from the engine, check the cooling ns and air cleaner for
clogging, and clean as necessary
Cooling ns
Air
intake
Cooling ns
Maintenance (continued)
10 hour maintenance
Loosen
thumbscrews
(more frequently in dusty
conditions)
1. Remove the air cleaner cover by
loosening the two thumbscrews.
2. Remove and inspect the pre-filter. If
the pre-filter is torn or otherwise dam-
aged, replace it with a new one.
3. Clean the pre-filter with soap and
water. Let dry before reinstalling.
4. Inspect the air cleaner element. If
the element is damaged or distorted,
replace it with a new one.
5. Tap filter gently on a hard surface to
dislodge debris from element or use
compressed air from the inside to
blow debris out and away from the air
cleaner element.
6. Install the air cleaner element, pre-
filter and cover in the reverse order of
removal.
Air lter
element
Pre-lter
IMPORTANT!
Direct the air stream at the inside face
of the lter only!
CAUTION!
Never operate the unit if the air
cleaner assembly is damaged or
missing!

14
spark plug gap--all models
Remove the spark
plug and adjust the
gap at the electrode
10/15 hour maintenance
0.6 mm
(0.024 inch)
Remove and replace the fuel filter
element.
■Use a hooked wire to extract the fuel
filter from inside the fuel tank. Inspect
the fuel filter element. If it shows signs
of contamination, replace with a genu-
ine Shindaiwa replacement fuel filter
element.
Fuel lter element
Hooked wire
50 hour maintenance
Maintenance (continued)
CAUTION!
Make sure you do not pierce the fuel
line with the end of the hooked wire.
The line is delicate and can be dam-
aged easily.
NOTE:
The NGK CMR5H also meets the
requirements for electro magnetic
compliance (EMC).
■Replace the spark plug annually:
Use only NGK CMR5H or equiva-
lent resistor type spark plug of the
correct heat range. Set spark plug
electrode gap to 0.6 mm (0.024
inch).
CAUTION!
Before removing the spark plug,
clean the area around the plug to
prevent dirt and debris from getting
into the engine’s internal parts.
Remove and clean or replace the
spark plug.
■Clean the spark plug. Adjust elec-
trode gap according to the values
listed in the ”Specifications” section.
If the spark plug must be replaced,
use only the type recommended in
”Specifications” or equivalent resis-
tor type spark plug of the correct
heat range.
Remove and inspect spark plug
■Before reinstalling the new filter
element, inspect the condition of all
the fuel system components (fuel
pick-up line, fuel return line, tank
vent line, tank vent, fuel cap and fuel
tank).
■If damage, splitting or deteriora-
tion is noted, the unit should be
removed from service until it can
be inspected or repaired by a Shin-
daiwa-trained service technician.
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.

15
Valve adjustment
135-Hour Maintenance
IMPORTANT!
If a new gasket is not available and/
or the old gasket is not damaged, the
old gasket may be reused. Never use
cracked or damaged gaskets!
6. Turn engine over several times, and
return to TDC-compression. Recheck
with proper feeler gauge to make sure
clearance adjustment did not change
as a result of tightening the locknut.
Readjust as necessary.
7. Replace rocker arm cover gasket
to assure proper sealing and install
cover.
1. Remove cylinder cover, rocker arm
cover, and spark plug. Rotate the
crankshaft while observing the pis-
ton through the spark plug open-
ing. When the piston is at the top of
the compression stroke (TDC), the
valves can be adjusted.
2. Loosen adjuster locknut so that the
2.5 mm Allen socket head adjustment
screw can turn freely.
3. Insert 0.10 mm (0.004”) feeler gauge
between valve stem tip and rocker
arm.
4. Turn adjustment screw (clockwise =
tighter, counter-clockwise = looser)
until feeler gauge is almost snug. Back
off just enough to allow gauge to slip
out with limited resistance.
5. While holding the adjustment screw in
place with the Allen driver, tighten the
locknut with a wrench.
CAUTION!
■Performing a valve adjustment
incorrectly may cause hard
starting and/or can damage the
engine.
■If you are unfamiliar with this
engine or uncomfortable with
this procedure, consult with an
authorized Shindaiwa servicing
dealer.
Maintenance (continued)
■Combustion chamber should be
decarbonized, and the valve clear-
ance should be adjusted. It is highly
recommended that this is done
by a Shindaiwa-trained service
technician.
■Replace the spark plug annually:
Use only the type recommended in
the ”Specifications” section or an
equivalent resistor type spark plug
of the correct heat range. Set spark
plug electrode gap to 0.6 mm.
IMPORTANT!
The valve clearance should be adjusted. It is highly recommended that this
is done by a Shindaiwa-trained service technician.

16
Engine
Cover
Screws
Engine Cover
Mufer
Mufer Gasket
Mufer Bolts
Spark Arrester Screen
Spark Arrester Cover
Cover Screws
1. Remove the engine cover.
If the engine becomes sluggish and low
on power, check and clean the spark
arrester screen.
IMPORTANT!
If you note excessive carbon buildup,
consult with an authorized Shindaiwa
servicing dealer.
Maintenance (continued)
Mufer Maintenance
WARNING!
Never operate the unit with
a damage or missing mufer or spark
arrester! Operating with a missing
or damaged spark arrester is a re
hazard and could also damage your
hearing.
2. Remove the muffler.
3. Remove the spark arrester screen and
cover.
4. Clean the screen with a stiff bristle
brush.
5. Inspect the cylinder exhaust port for
any carbon buildup.
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 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.
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.
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 Shindaiwa dealer.
6. Reassemble in the reverse order of
disassembly.

17
Whenever the unit will not be used for
30 days or longer, use the following
procedures to prepare it for storage:
■Clean external parts thoroughly.
■Drain all the fuel from the carbure-
tor and the fuel tank.
Long Term Storage ■Remove remaining fuel from the
fuel lines and carburetor with the
fuel drained from the fuel tank. To
do so:
1. Prime the primer bulb until no
more fuel is passing through.
2. Start and run the engine until it
stops running.
3. Repeat steps 1 and 2 until the
engine will no longer start.
■Remove the spark plug and pour
about 7mL (¼ oz.) of 2-cycle mix-
ing oil into the cylinder through
the spark plug hole. Slowly pull
the recoil starter 2 or 3 times so oil
will evenly coat the interior of the
engine. Reinstall the spark plug.
CAUTION!
Gasoline stored in the carburetor
for extended periods can cause
hard starting, and could also lead to
increased service and maintenance
costs.
■Before storing the unit, repair or
replace any worn or damaged parts.
■Remove the air cleaner element
from the carburetor and clean it
thoroughly with soap and water, let
dry and reassemble the element.
■Store the unit in a clean, dust-free
area.
Adjusting Engine Idle
The engine must return to idle speed
whenever the throttle trigger is
released. Idle speed is adjustable, and
must be set low enough to permit the
engine clutch to disengage the cutting
attachment.
WARNING!
The cutting attachment
must NEVER move at engine
idle! If the idle speed cannot
be adjusted by the procedure
described here, return the unit
to your Shindaiwa dealer for
inspection.
Idle Speed Adjustment
1. Place the unit on the ground, then
start the engine, and then allow it to
idle 2-3 minutes until warm.
2. If the attachment moves when the
engine is at idle, reduce the idle
speed by turning the idle adjustment
screw counter-clockwise.
3. If a tachometer is available, adjust
idle. Check Specifications page for
correct idle speed
NOTE:
Carburetor fuel mixture adjustments
are preset at factory and cannot be
serviced in the eld.
IMPORTANT!
All stored fuels should be stabilized
with a fuel stabilizer such as STA-BIL.
Idle
Ajust-
ment
Screw

18
Pump
No output/low output.
Pump is internally damaged.
Poor output at higher
suction lifts
Symptom Possible Cause
Suction strainer or hose is clogged or
damaged. (NOTE: liner-type hoses can also
collapse internally).
Remedy
Clean or replace components as required.
Consult with an authorized Shindaiwa
servicing dealer.
Pump was not primed.
Pump head too high.
Suction hose too long.
Air leak in suction hose.
Prime pump.
Move discharge pipe.
Use shortest suction length possible.
Tighten all connections.
Air leak in suction hose.
Air leakage in pump.
Worn pump impeller or volute.
Engine not operating at full rpm.
Tighten all connections.
Inspect and repair as required.
Repair or replace components as required.
Consult with an authorized Shindaiwa
servicing dealer.
Troubleshooting Guide
Vaporlock.
Valve adjustment.
Engine hot/heat soaked.
Low fuel quality.
Valve clearance too tight.
Valve clearance too loose.
Let cool completely and restart.
Refill with fresh, clean unleaded gasoline with a pump octane
of 89 or higher mixed with an air cooled engine oil that
meets or exceeds ISO-L-EGD and/or JASO FD classified oils
at 50:1 gasoline/oil ratio.
Consult with an authorized Shindaiwa
servicing dealer. Adjust valves.
What To Check Possible Cause Remedy
ENGINE DOES NOT START OR HARD TO START

19
Troubleshooting Guide
NO
NO
NO
NO
Does the engine crank?
Good compression?
Does the tank contain fresh
fuel of the proper grade?
Is fuel visible and moving
in the return line when
priming?
Is there spark at the spark
plug wire terminal?
Check the spark plug.
Faulty recoil starter.
Fluid in the crankcase.
Internal damage.
Loose spark plug.
Excess wear on cylinder,
piston, rings.
Fuel incorrect, stale, or
contaminated; mixture incorrect.
Check for clogged fuel filter
and/or vent.
Priming pump not functioning properly.
The ignition switch is in
“O” (OFF) position.
Shorted ignition ground.
Faulty ignition unit.
If the plug is wet, excess
fuel may be in the cylinder.
The plug is fouled or improperly
gapped.
The plug is damaged internally
or of the wrong size.
Consult with an authorized Shindaiwa servicing dealer.
Tighten and re-test.
Consult with an authorized Shindaiwa
servicing dealer.
Refill with fresh, clean unleaded gasoline with a pump octane
of 89 or higher mixed with an air cooled engine oil that
meets or exceeds ISO-L-EGD and/or JASO FD classified oils
at 50:1 gasoline/oil ratio.
Replace fuel filter or vent as required.
Re-start.
Consult with an authorized Shindaiwa
servicing dealer.
Move switch to “I” (ON) position
and re-start.
Consult with an authorized Shindaiwa
servicing dealer.
See "Starting a Flooded Engine"
Clean and gap the spark plug. Check the Specifications
section for the correct plug and gap for your unit. Restart.
Replace the spark plug. Check the Specifications section for
the correct plug and gap for your unit. Restart.
NO
YES
What To Check Possible Cause Remedy
ENGINE DOES NOT START
YES
YES
YES
YES

20
Is the engine overheating?
Engine is rough at all
speeds. May also have
black smoke and/or
unburned fuel at the
exhaust.
Carburetor mixture is too lean.
Improper fuel ratio.
Fan, fan cover, cylinder fins dirty
or damaged.
Carbon deposits on the piston or
in the muffler.
Clogged air cleaner element.
Loose or damaged spark plug.
Air leakage or clogged fuel line.
Water in the fuel.
Piston seizure.
Faulty carburetor and/or diaphragm.
Overheating condition.
Improper fuel.
Carbon deposits in the
combustion chamber.
Consult with an authorized Shindaiwa
servicing dealer.
Refill with fresh, clean unleaded gasoline with a pump octane
of 89 or higher mixed with an air cooled engine oil that meets
or exceeds ISO-L-EGD and/or JASO FD classified oils at 50:1
gasoline/oil ratio.
Clean, repair or replace as necessary.
Consult with an authorized Shindaiwa
servicing dealer.
Service the air cleaner element.
Tighten or replace the spark plug.
Check the Specifications section for the correct plug and gap
for your unit.
Repair or replace fuel filter and/or
fuel line.
Refill with fresh, clean unleaded gasoline with a pump octane
of 89 or higher mixed with an air cooled engine oil that meets
or exceeds ISO-L-EGD and/or JASO FD classified oils at 50:1
gasoline/oil ratio.
Consult with an authorized Shindaiwa servicing dealer.
Consult with an authorized Shindaiwa
servicing dealer.
Refill with fresh, clean unleaded gasoline with a pump octane
of 89 or higher mixed with an air cooled engine oil that meets
or exceeds ISO-L-EGD and/or JASO FD classified oils at 50:1
gasoline/oil ratio.
Consult with an authorized Shindaiwa
servicing dealer.
What To Check Possible Cause Remedy
LOW POWER OUTPUT
Engine is knocking.
Troubleshooting Guide (continued)