Page 1
SHINDAIWA OWNER’S/OPERATOR'S MANUAL
AHS2510 ARTICULATED
HEDGE TRIMMER
WARNING!
Always wear eye and ear protection when operating this machine!
To minimize the risk of injury to yourself
and others, read this manual and familiarize yourself with its contents.
Part Number 68800-94313 Rev. 3/07
Page 2
2
Introduction
DO NOT OPERATE THIS UNIT�
IF YOU ARE TIRED, ILL OR�
UNDER THE INFLUENCE OF�
ALCOHOL, DRUGS, OR�
MEDICATION.�
�
The Shindaiwa AHS2510 Articulated
Hedge Trimmer is designed and built to
deliver superior performance and reliability without compromise to quality, comfort,
safety or durability.
Shindaiwa’s high-performance engines
represent the leading edge of all position
4-cycle 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!
The procedures described in this manual
are intended to help you get the most from
your machine 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
power tool, or if you do not understand
something in this manual, your Shindaiwa
dealer will be glad to assist you.
You may also contact Shindaiwa, Inc.
at the address printed on the back of this
Manual.
Contents
Introduction ................................................ 2
Attention Statements ................................. 2
Safety Instructions ..................................... 2
Safety Equipment and Labels ................... 3
Operating Precautions ............................... 3
Operating the Hedge Trimmer ................. 4
Specifications .............................................. 5
Product Description ................................... 5
Assembly ..................................................... 6
Adjusting the Cutter Assembly ................. 7
Mixing Fuel ................................................ 8
Starting the Engine .................................... 9
Stopping the Engine ................................ 10
Adjusting Engine Idle .............................. 10
Maintenance ............................................. 11
Cutter Blade Adjustment ......................... 12
Long Term Storage .................................. 13
Troubleshooting Guide ........................... 15
Emission System Warranty ..................... 18
Page
Attention Statements
Throughout this manual are special attention statements.
DANGER!
A statement preceded by the triangular
attention symbol and the word “DANGER” indicates an imminently hazardous situation which, if not avoided,
WILL result in death or serious injury!
WARNING!
A statement preceded by the
triangular attention symbol and the
word “WARNING” indicates a potentially hazardous situation which, if not
avoided, COULD result in death or
serious injury.
CAUTION!
A statement preceded by the word
“CAUTION” contains information that
should be acted upon to avoid damage
to the machine.
IMPORTANT!
A statement preceded by the word
“IMPORTANT” is one that possesses
special signicance.
NOTE:
A statement preceded by the word “NOTE”
contains information that is handy to know
and may make your job easier.
Read and follow this manual, make
sure anyone using the trimmer
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.
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
trimmer to reduce the risk of being
struck by falling objects or thrown
debris.
The blades are SHARP! Handle
with care.
Safety Instructions
DANGER!
THE ARTICULATED HEDGE
TRIMMER IS NOT INSULATED
AGAINST ELECTRICAL SHOCK!
Approaching or contacting electrical
lines with the trimmer could cause
death or serious injury. Keep the trimmer at least 33 feet (10 meters) away
from electrical lines or branches that
contact electrical lines.
WARNING!
The engine exhaust from this product
contains chemicals known to the State
of California to cause cancer, birth
defects or other reproductive harm.
An articulated hedge trimmer has the
potential to cause serious personal injury
to the operator or bystanders if misused,
abused or mishandled. To reduce the risk
of injury, you must maintain control at all
times, and observe all safety precautions
during operation. Never permit a person
without training or instruction to operate
this trimmer!
Stay Alert
You must be physically and mentally fit to
operate this unit safely.
WARNING!
Never operate
power equipment of any
kind if you are tired or if you are under
the inuence of alcohol, drugs, medication or any other substance that could
affect your ability or judgement.
IMPORTANT!
The information contained in these instructions describes machines available
at the time of publication. While every
attempt has been made to provide the
latest information about your Shindaiwa
product, there may be some differences
between your AHS2510 and what is described here. Shindaiwa Inc. reserves the
right to make changes to products without
prior notice and without obligation to
make alterations to machines previously
manufactured.
Page 3
Safety Equipment and Labels
Shaft Safety Label
Stop
Switch
Throttle
Interlock
Handle
Cutter Guard
Cutter Blade
Scabbard
IMPORTANT!
Caution, Danger, Warning, and
Operation Information Labels:
Make sure all information labels are
undamaged and readable. Immediately replace damaged or missing
information labels. New labels are
available from your local authorized
Shindaiwa dealer.
Figure 1
Operating Precautions
n Never transport the articulated
hedge trimmer or leave it unattended with the engine running.
An engine that’s running could be
accidently accelerated causing the
blades to oscillate.
n Make sure the cover is in place
when transporting the articulated
hedge trimmer.
n Always make sure the cutter attach-
ment is properly installed and rmly
tightened before operation.
n Inspect for broken, missing or
improperly installed parts or attachments.
n Never use a cracked or warped
cutter or cutter bar: replace it with
a serviceable one and make sure it
ts properly.
n Make sure there are no missing or
loose fasteners, and that the stop
switch and throttle controls are
working properly.
WARNING!
n Make sure there is always good
ventilation when operating the
articulated hedge trimmer. Fumes
from engine exhaust can cause serious injury or death. Never run the
engine indoors!
n Never smoke or light res near the
hedge trimmer. Keep the trimmer
away from excessive heat. Engine
fuel is very ammable and re could
lead to serious personal injury or
property damage.
n Make sure the cutters are correctly
adjusted before operating the articulated hedge trimmer (see page 13
for cutter adjustment procedures).
Never attempt cutter adjustment
with the engine running!
n Before starting the engine, make
sure the cutter is not contacting
anything.
n Stop the machine immediately if it
suddenly begins to vibrate or shake.
n Always stop the engine immediately
and check for damage if you strike
a foreign object or if the machine
becomes tangled. Do not operate
with broken or damaged equipment.
n When cutting a branch that is under
tension, be alert for spring-back so
that you will not be struck by the
moving branch.
n If a cutter should bind fast in a cut,
shut off the engine immediately.
Push the branch or tree to ease the
bind and free the cutter.
n Always stop the engine and allow
it to cool before refueling. Avoid
overlling and wipe off any fuel that
may have spilled.
3
Page 4
4
CAUTION!
n Always maintain the articulated
hedge trimmer according to this
owner’s manual and follow the
recommended scheduled maintenance.
n Never modify or disable any of the
hedge trimmer’s safety devices.
n Always use genuine Shindaiwa
parts and accessories when repairing or maintaining this machine.
n Do not make unauthorized modi-
cations to the articulated hedge
trimmer.
n Never allow the engine to run at
high RPM without a load. Doing so
could damage the engine.
n When transporting the hedge trim-
mer in a vehicle, tie it down securely
to prevent fuel spillage or damage
to the machine.
n Always stop the engine and allow
it to cool before refueling. Avoid
overlling and wipe off any fuel that
may have spilled.
n Never place ammable material
close to the engine mufer and
never run the engine without the
spark arrestor screen in place.
n Always clear your work area of
trash or hidden debris to help ensure good footing.
n Keep the cutters sharp and properly
adjusted.
n Keep the articulated hedge trimmer
as clean as possible. Keep it free of
loose vegetation, mud, etc.
Operating the Articulated Hedge Trimmer
Always wear a hard hat to reduce
the risk of head injuries during
operation of this machine.
Secure long hair
so it is above
shoulder level.
Wear non-slip heavy-duty
gloves to improve your
grip on the trimmer handle.
Wear snug-tting clothes
that also permit freedom of
movement. NEVER wear
shorts!
Keep a proper footing and do not
overreach—maintain your balance
at all times during operation.
Wear sturdy footwear with nonslip
soles to provide good footing.
Steel-toed safety boots are recommended. Never operate machine
bare-footed.
Always wear eye and hearing protection. Shindaiwa recommends wearing
a face shield as additional face and
eye protection.
Always operate with
both hands rmly gripping the machine.
Keep bystanders at least 50 feet
(15 meters) away from the operating trimmer to reduce the risk of
being struck by falling objects or
thrown debris.
Figure 2
Page 5
Prior To Assembly
Product Description
Using Figure 3 as a guide, familiarize yourself with the Shindaiwa AHS2510 articulated hedge trimmer and its various components. Understanding your machine helps
ensure top performance, longer service life,
and safer operation.
Before assembling, make sure you have
all the components required for a complete
unit:
n Engine/outer tube assembly
n Gearcase/cutter assembly
n Kit with this manual and tool kit for
routine maintenance.
n Cutter blade scabbard
Carefully inspect all components for damage.
WARNING!
Do not make unauthorized modications or alterations to your articulated
hedge trimmer or its components.
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.
Stop Switch
Throttle
Trigger
Recoil
Starter
Figure 3
Spark
Plug
Fuel Tank Guard
Powerhead Assembly
Handle
Grip
Fuel Tank
Guard
Air Filter
Assembly
Fuel Tank
Hedge Trimmer Cutter
Assembly
Cutter
Assembly
Adjustment
Lever
Handle
Latch Lock
Latch
Release
Gearcase
Outer
Tube
Cutter Guard
Cutter Blade
Scabbard
Hedge Trimmer
Cutter Assembly
Cutter Bar and
Cutter Blades
Specications
Model Name............................................................................AHS2510
Engine Model...........................................................................SF2510E
Engine Type................................4-cycle, vertical cylinder, air cooled
Dry Weight....................................................................6.2 kg/13.6 lbs.
Bore x Stroke.................................................34 x 27 mm/1.34 X1.06”
Displacement. ............................................................24.5cc/1.5 cu. in.
Engine Speed at Maximum Power Output............7,500 rpm (min-1)
Maximum Power Output ..............................................1.1 hp/0.8 kW
Engine Speed at Idling ............................................3,000 rpm (min-1)
Maximum Engine Speed ......................................10,500 rpm (min-1)
Fuel/Oil Ratio ...........................................50:1 with Premium 2-cycle
air cooled mixing oil
Fuel Tank Capacity.........................................................590 ml/20 oz.
Carburetor............................................Walbro WYL diaphragm type
Ignition System , Fully electronic, program controlled
Specifications are subject to change without notice.
Spark Plug.....................................................................NGK CMR5H
Air Filter .................................................Non-reversible, heavy duty,
two-stage, filter element
Starting Method...........................................................Recoil Star ter
Stopping Method ............................................................Slide Switch
Cooling System ..................................................................Forced Air
Transmission Type........................... Automatic, centrifugal clutch
with bevel gear
Blade Length ...........................................................567 mm/22.3 in.
Cutter Drive.......................................................................Spur Gear
Gear Lubricant ..............................................Lithium Based Grease
Standard Equipment : Tool kit containing a spark plug wrench,
4mm hex wrench, and 8 x 10 mm spanner
Optional Equipment : Harness and bracket, front handle
5
Page 6
6
Assembly
Connect the Powerhead/Outer
Tube to the Gearcase
1. Place the powerhead/outer Tube Assembly on a clean, flat surface, spark
plug facing up.
2. Use the 4mm hex wrench to loosen the
tube clamp and index screw. Verify that
the D-shaped shim washer is positioned
as shown in Figure 4.
Gearcase/Cutter
Assembly
Tube
Clamp
CAUTION!
Do not remove the D-shaped shim
washer! The shim washer prevents
damage from overtightening the tube
clamp screw.
3. Slide the outer tube into the tube clamp
until the tube bottoms. If installation is
difficult, rotate the outer tube or main
shaft slightly until you feel the mainshaft splines engage with the gearcase.
CAUTION!
Do not force the shaft tube into the
gearcase! Excessive force can damage the shaft tube and mainshaft.
4. Position the outer tube so that the index
hole on the outer tube is aligned with
the index screw on the gearcase tube
clamp.
Outer Tube
Index
Figure 4
Hole
5. Using finger pressure only, thread the
index screw into the index hole located
on the outer tube until it bottoms out.
6. Tighten the index screw and the clamp
screw firmly.
Index Screw
D-Washer
Clamp Screw
Mainshaft
NOTE:
It may be necessary to twist the outer tube
slightly for the index screw to be inserted fully.
Page 7
Adjusting the Hedge Trimmer Cutter Assembly
2. With the index finger of your left
WARNING!
The cutter blades are very sharp.
Do not grasp the blades with your
hands. Do not allow the blades to
contact your body.
IMPORTANT!
Always use gloves when working near the
cutter assembly.
Adjustment Lever
Latch Release
Latch Lock
hand, press the latch lock. With your
left thumb, press the latch release.
See Figure 6.
Figure 6
3. While holding the latch release down,
pivot the cutter assembly using the
adjustment lever until it is at the desired
cutting angle.
Travel Limiter
Various blade
positions possible
The cutter assembly
can be adjusted to
10 different positions ranging from
90° to 225° from the
outer tube as shown.
Always make sure
the lock latch is
securely locked after
each adjustment.
Figure 8
Figure 5
1. With your right hand, grasp the outer
tube near the handle. With your left
hand, grip the adjustment lever on the
cutter assembly. See Figure 5.
IMPORTANT!
The latch lock provides an interlock to
help prevent inadvertent depression of
the latch release.
Figure 7
NOTE:
The AHS2510 Articulated hedge trimmer is
equipped with a travel limiter that prevents
the cutter assembly from rotating outside of
the 90°- 225° range. See Figures 7 and 8.
Adjusting Cutter Assembly for
Storage or Transportation
4. Release the latch lock and the latch
release. Make sure the latch lock and
the latch release return securely to the
straight ahead position.
5. Remove the scabbard from the cutter
blade. The engine now may be started
(refer to page 10 for procedures).
7
Page 8
8
Mixing Fuel
CAUTION!
Some gasolines contain alcohol as
an oxygenate! Oxygenated fuels may
cause increased operating temperatures. Under certain conditions,
alcohol-based fuels may also reduce
the lubricating qualities of some mixing
oils. Never use any fuel containing
more than 10% alcohol by volume!
Generic oils and some outboard motor
oils may not be intended for use in
high-performance air cooled engines,
and should never be used in your
Shindaiwa Articulated Hedge Trimmer!
Filling the Fuel Tank
n Use only fresh, clean unleaded gasoline
with an octane rating of 87 or above.
n Mix all fuel with Shindaiwa Premium
ONE 2-cycle Mixing Oil at a gasoline/
oil ratio of 50:1 (1-gallon of gasoline to
2.6 oz. mixing oil).
IMPORTANT!
Mix only enough fuel for your immediate
needs! If fuel must be stored longer than
30 days, it should rst be treated with a
stabilizer such as StaBil™.
CAUTION!
This engine is certied to operate on
a 50:1 mixture consisting of unleaded
gasoline and ISO-L-EGD or JASO FC
class 2-cycle mixing oil only.
WARNING!
Minimize the risk of re!
n STOP engine before refueling.
n ALWAYS allow the engine to cool
before refueling!
n Wipe all spilled fuel and move the
engine at least 10 feet (3 meters)
from the fueling point and source
before restarting!
n NEVER start or operate this
unit if there is a fuel leak.
n NEVER start or operate this
unit if the carburetor, fuel lines, fuel
tank and/or fuel tank cap
are damaged.
n NEVER smoke or light any res
near the engine or fuel source!
n NEVER place any ammable mate-
rial near the engine mufer!
n NEVER operate the engine without
the mufer and spark arrester in good
working condition.
1. Place the trimmer on a flat, level surface.
2. Clear any dirt or other debris from
around the fuel filler cap.
3. Remove the fuel cap, and fill the fuel
tank with a clean, fresh fuel mixture.
DO NOT OVERFILL.
4. Install and firmly tighten the fuel cap.
Page 9
Starting the Engine
IMPORTANT!
Engine ignition is controled by a two
position switch mounted on the throttle
housing labeled, "I" for ON or START and
"O" for OFF or STOP.
ON
Make sure the
cutting attach-
ment
is clear of
obstructions!
IMPORTANT!
If the engine fails to start after several
attempts with the choke in the closed
position, the engine may be ooded
with fuel. If ooding is suspected,
move the choke lever to the open position
and repeatedly pull the recoil starter to
remove excess fuel and start the engine.
If the engine still fails to start, refer to the
troubleshooting section of this manual.
Throttle Lock
Button
Figure 9
1. Slide the ignition switch to the “ON”
position. See Figure 9.
2. Set the throttle lever to the “fast idle”;
a. Squeeze the throttle lever 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 lever.
Then release the throttle lock button.
See Figure 9.
Return Tube
Primer Bulb
Figure 10
3. Press the primer bulb until fuel can be
seen flowing in the transparent return
tube.
IMPORTANT!
The primer system only pushes fuel
through the carburetor. Repeatedly
pressing the primer bulb will not ood the
engine with fuel.
4. Set the choke
Closed
lever to the
CLOSED position if engine is
cold.
Figure 12
5. While holding the outer tube firmly
with left hand. Use your other hand
to slowly pull the recoil starter handle
until resistance is felt, then pull quickly
to start the engine.
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 blades may move (oscillate) when the engine is started. Keep
away from the cutter assembly while
starting the engine!
6. When the engine starts, slowly move
the choke lever to the "OPEN" position.
See Figure 13. (If the engine stops
after the initial start, close the choke
and restart.)
Open
When the Engine Starts...
n After the engine starts, allow the engine
to warm up at idle 2 or 3 minutes before
operating the unit.
n Advancing the throttle makes the cut-
ting attachment oscillate faster; releasing the throttle permits the attachment
to stop oscillating. If the cutting attachment continues to oscillate when the
engine returns to idle, carburetor idle
speed should be adjusted (see "Adjusting Engine Idle" on the next page).
Starting A Flooded Engine
1. Disconnect the spark plug lead and use
the spark plug wrench to remove the
spark plug (turn counter clockwise to
remove).
2. Slide the ignition switch to the “O”
(STOP) position.
If the spark plug is fouled or soaked with
fuel, clean the plug as necessary.
3. Open the choke (Figure 13) and fully
depress the throttle lever with your left
hand, then pull the starter handle rapidly with your right hand to clear excess
fuel from the combustion chamber.
4. Reinstall the spark plug and tighten it
firmly. If a torque wrench is available,
torque the spark plug to 148–165 in.-lb
(170–190 kg/cm).
5. Repeat the starting procedure for a
warm engine.
6. If the engine still fails to start, refer to
the troubleshooting section near the
end of this manual.
Figure 11
Figure 13
WARNING!
Never start the engine from the operating position.
9
Page 10
10
Stopping the Engine
OFF
Figure 14
Adjusting Engine Idle
Idle the engine briefly before stopping
(about 2 minutes), then slide the ignition
switch to the “O” (Engine OFF) position.
WARNING!
The cutting blades must NEVER move
(oscillate) at engine idle! If the idle
speed cannot be adjusted by the procedure described here, return the unit
to your Shindaiwa dealer for inspection.
NOTE:
Carburetor fuel mixture adjustments are
preset at factory and cannot be serviced in
the field.
Figure 15
The engine must return to idle speed
whenever the throttle lever is released.
Idle speed is adjustable, and must be set
low enough to permit the engine clutch to
disengage the cutting attachment.
Idle Adjusting
Screw
Idle Speed Adjustment
1. Place the unit on the ground and start
the engine, then allow it to idle 2-3 minutes until warm.
2. If the cutting blades oscillate when the
engine is at idle, reduce the idle speed
by turning the idle adjustment screw
counter-clockwise. See Figure 15.
3. If a tachometer is available, the engine idle
speed should be final adjusted to 3,000
(±300) rpm (min-1).
Page 11
General Maintenance
IMPORTANT!
MAINTENANCE, REPLACEMENT, OR
REPAIR OF EMISSION CONTROL DEVICES AND SYSTEM MAY BE PERFORMED
BY ANY REPAIR ESTABLISHMENT OR
INDIVIDUAL. HOWEVER, WARRANTY
REPAIRS MUST BE PERFORMED BY A
DEALER OR SERVICE CENTER AUTHORIZED BY SHINDAIWA CORPORATION
AND 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 THE WARRANTY CLAIM.
Mufer
WARNING!
Before performing any maintenance,
repair, or cleaning work on the
machine, make sure the engine and
cutting attachment are completely
stopped. Disconnect the spark plug
wire before performing service or
maintenance work.
WARNING!
Non-standard parts may not operate
properly with your unit and may cause
damage and lead to personal injury.
IMPORTANT!
Using non-standard replacement parts
could invalidate your Shindaiwa warranty.
WARNING!
Operating the engine without a mufer
or with a mufer that is damaged or im-
properly installed can increase engine
noise sufciently to cause hearing loss.
Daily Maintenance
Prior to each work day, perform the following:
n Remove all dirt and debris from the
engine, check the cooling fins and air
cleaner for clogging, and clean as necessary. See Figure 16.
Keep cooling
ns clean
Keep air
passages
clean
This machine must never be operated with
a faulty or missing spark arrestor 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.
WARNING!
Always wear gloves when
working around the cutter assembly.
n Clean any debris or dirt from the hedge
trimmer cutter blades. Lubricate the
blades before use and after refueling.
Check the cutters for damage or incorrect adjustment.
n Check for loose or missing screws or
components. Make sure the cutter attachment is securely fastened.
n Check the entire machine for leaking
fuel or grease.
n Make sure nuts, bolts, and screws (ex-
cept carburetor adjusting screws) are
tight.
Spark Plug
Keep the spark plug and wire connections
tight and clean.
Figure 16
n 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 overheating, fire, or premature
wear.
11
Page 12
12
Cutter Blade Adjustment
WARNING!
The cutter blades are very sharp!
Always wear gloves when working
around the cutter assembly.
CAUTION!
Operating the trimmer with worn or
improperly adjusted cutters will reduce
cutter performance and may also damage your machine.
Cutting performance of your machine depends a great deal on proper cutter blade
adjustment. Properly adjusted blades will
oscillate freely yet help prevent binding of
cut material between blades.
10-Hour Maintenance
(more frequently in dusty
conditions)
1. Remove the air cleaner cover by loosening the thumb screws and lifting up. See
Figure 18A.
2. Remove and inspect the pre-filter. If the
pre-filter is torn or other wise damaged,
replace it with a new one. See Figure 18B.
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 filter
element.
Adjust blades as follows (Figure 17):
1. Loosen all blade locknuts at least one
full turn.
2. Tighten each blade shoulder bolt firmly,
and then loosen the shoulder bolts 1/4
to 1/2 turn.
3. Working from the gearcase end, lock
each bolt in place by firmly tightening
its locknut while preventing the shoulder bolt from turning.
When shoulder bolt adjustment is correct,
there should be a gap of
0.25–0.50 mm between the cutter blades
and the flat washers, and the flat washer
beneath each bolt head should turn freely.
Unscrew
Fasteners
Figure 18A
IMPORTANT!
Direct the air stream at the inside face of
the lter only!
6. Install the filter element, pre-filter and
cover in the reverse order of removal.
Guide Bar
Cutter Blades
Figure 17
Filter
Element
Figure 18B
Shoulder
Bolt
Locknut
Washer
(should turn
freely)
Pre-Filter
CAUTION!
Never operate the unit if the air cleaner
assembly is damaged or missing!
10/15-Hour Maintenance
CAUTION!
Before removing the spark plug, clean
the area around the plug to prevent dirt
and dust from getting into the engine’s
internal parts.
Every 10 to 15 hours
of operation:
n Remove and clean the spark plug.
See Figure 19. Adjust the spark plug
electrode gap to 0.024-inch (0.6 mm).
If the plug must be replaced, use only:
NGK CMR5H or equivalent.
Clean the spark
plug and check
the gap at the
electrode.
0.024 inch
(0.6 mm)
Figure 19
n Lubricate the cutter assembly gear-
box by pumping one or two strokes
of lithium-base grease into the grease
fitting using a lever-type grease gun.
See Figure 20.
CAUTION!
Overlubricating can cause the gearbox
to operate sluggishly and can cause
grease to leak out.
Gearbox Grease
Fitting
Figure 20
Page 13
50-Hour Maintenance
Every 50 hours of operation
(more frequently in dusty or
dirty conditions):
n Remove and clean the cylinder cover
and clean dirt and debris from the cylinder cooling fins.
n Lubricate the gearcase. To perform
this operation, first remove the gearcase
from the outer tube as follows:
Gearcase
Outer Tube
Figure 21
Clamp Bolt
Gearcase
Index Bolt
CAUTION!
Do not remove the D-shaped shim
washer from the gearcase clamp! The
shim washer prevents damage from
overtightening the tube clamp screw.
a. Loosen the gearcase clamp bolt.
b. Remove the index bolt from the
gearcase.
c. Slide the gearcase out of the tube.
Using a grease gun, pump lithium-base
grease (about 10 grams) into the grease
fitting on the gearcase until you see old
grease being purged from the gearcase
(Figure 22). Purged grease will be
visible in the outer tube cavity. Clean
up excess grease, then reassemble the
gearcase onto the outer tube. Make sure
the index bolt fits into the hole on the
outer tube. Securely tighten both bolts.
Gearcase
Figure 22
Grease Fitting
Servicing the fuel lter
CAUTION!
Make sure you do not pierce the fuel
line with the end of the hooked wire.
The line is delicate and can be damaged easily.
n Use a wire hook to extract the fuel filter
from inside the fuel tank (Figure 23). Inspect the fuel filter element. If it shows
signs of contamination from debris,
replace it with a genuine Shindaiwa
replacement fuel filter element. Before
reinstalling the filter, inspect the fuel
line. If you discover damage or deterioration, the unit should be removed from
service until it can be inspected by a
Shindaiwa-trained service technician.
Hooked
Wire
Figure 23
Filter Element
139/150-Hour Maintenance
Maintenance after rst 139-hours,
then every 150-hours thereafter.
n Combustion chamber should be decar-
bonized, and the valve clearance should
be adjusted. It is highly recommended
that this is done by a Shindaiwa-trained
service technician.
n Replace the spark plug annually: Use
only NGK CMR5H or equivalent resistor type spark plug of the correct heat
range. Set spark plug electrode gap to
0.024-0.028 inch (0.6 -0.7 mm).
NOTE:
The NGK CMR5H also meets the requirements for electro magnetic compliance (EMC).
Valve Adjustment
1. Remove cylinder cover, rocker arm
cover, and set piston at TDC-compresion.
CAUTION!
n Performing a valve adjustment
incorrectly may cause hard starting
and/or can damage the engine.
n If you are unfamiliar with this engine
or uncomfortable with this procedure, consult with an authorized
Shindaiwa servicing dealer.
2. Loosen adjuster locknut so that the 2.5
mm Allen socket head adjustment screw
can turn freely.
3. Insert feeler gauge (.004” for both intake
and exhaust) 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 adjustment screw in
place with Allen driver, tighten locknut
with wrench.
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 locknut. Readjust
as necessary.
7. Replace rocker arm cover gasket to assure proper sealing and install cover.
IMPORTANT!
If new gasket is not available and/or old
gasket is not damaged, old gasket may
be reused. Never use cracked or damaged gaskets!
13
Page 14
14
Spark Arrester Screen Maintenance
If the engine becomes sluggish and low on
power, check and clean the spark arrester
screen.
WARNING!
Never operate the unit with a damaged
or missing mufer or spark arrester!
Operating with missing or damaged
spark arrester is a re hazard and
could also damage your hearing.
1. With a 3 mm hex wrench remove the
4 engine cover screws and the engine
cover. See Figure 24.
2. With a 4 mm hex wrench remove the
3 muffler bolts and the muf fler. See
Figure 24.
3. With a small flat bladed screwdriver
remove the 2 screws holding the
spark arrester screen and cover to
the muffler. See Figure 24.
4. Remove the screen and clean it with a
stiff bristle br ush.
5. Inspect the cylinder exhaust port for
any carbon buildup.
Engine Cover
Screws
Figure 24
6. Reassemble the spark arrester, muffler
and engine cover in the reverse order of
disassembly.
Engine
Cover
Mufer
Mufer
Gasket
Mufer Bolts
Spark Arrester
Screen
Spark Arrester
Cover
Screws
Cover
IMPORTANT!
If you note excessive carbon buildup,
consult your servicing dealer.
Long Term Storage
Whenever the machine will not be used
for 30 days or longer, use the following
procedures to prepare it for storage:
n Clean external parts thoroughly and
apply a light coating of oil to all metal
surfaces.
CAUTION!
Gasoline stored in the carburetor for extended periods can cause
hard starting, and could also lead to
increased service and maintenance
costs.
NOTE
Damage resulting from stale or contaminated
fuel is not covered by the Shindaiwa warranty
policy.
n Drain all the fuel from the carburetor
and the fuel tank.
IMPORTANT!
All stored fuels should be stabilized with a
fuel stabilizer such as STA-BIL®.
n Remove the spark plug and pour about
1/4 ounce of 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.
n Before storing the machine, repair or
replace any worn or damaged par ts.
n Remove the air cleaner element from
the carburetor and clean it thoroughly
with soap and water. Rinse and dry
thoroughly, then add a few drops of oil
and work it in. Reassemble.
n Store the machine in a clean, dust-free
area.
Page 15
Troubleshooting Guide
Does the engine crank?
Faulty recoil starter.
Fluid in the crankcase.
Internal damage.
Consult with an authorized servicing dealer.
Consult with an authorized servicing dealer.
Consult with an authorized servicing dealer.
NO
Good compression?
Loose spark plug.
Excess wear on cylinder, piston, rings.
Valves not seating.
Tighten and re-test.
NO
YES
Does the tank contain
fresh fuel of the proper
grade?
Refill with fresh, clean unleaded gasoline with
a pump octane of 87 or higher mixed with
a 2-cycle air cooled mixing oil that meets or
exceeds ISO-L-EGD and/or JASO FC classified
oils at 50:1 gasoline/oil ratio.
Fuel incorrect, stale or contaminated;
mixture incorrect.
NO
YES
Is fuel visible and moving
in the return line when
priming?
Check for clogged fuel filter and/or vent.
Priming pump not functioning properly.
Replace fuel filter or vent as required; restart.
Consult with an authorized servicing dealer.
NO
Is there spark at the spark
plug wire terminal?
The ignition switch is in “O” (OFF)
position.
Shorted ignition ground.
Faulty ignition unit.
Move switch to “I” (ON) position and restart.
NO
YES
YES
Check the spark plug.
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.
Crank the engine with the plug removed,
reinstall the plug, and restart.
Clean and regap the plug to 0.024 - 0.028
inch (0.6 - 0.7 mm). Restart.
Replace the plug with an NGK CMR5H or
equivalent resistor type spark plug of the
correct heat range. Set spark plug electrode
gap to 0.024-0.028 inch (0.6-0.7 mm).
YES
What To Check Possible Cause Remedy
ENGINE DOES NOT START OR HARD TO START
15
Page 16
16
Troubleshooting Guide (continued)
Is the engine overheating?
Operator is overworking the unit.
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.
Cut at a slower rate.
Consult with an authorized servicing dealer.
Refill with fresh, clean unleaded gasoline with
a pump octane of 87 or higher mixed with
a 2-cycle air cooled mixing oil that meets or
exceeds ISO-L-EGD and/or JASO FC classified
oils at 50:1 gasoline/oil ratio.
Clean, repair or replace as necessary.
Consult with an authorized servicing dealer.
What To Check Possible Cause Remedy
Engine is rough at all
speeds. May also have
black smoke and/or
unburned fuel at the
exhaust.
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.
Valve clearance set incorrectly.
Service the air cleaner element.
Tighten or replace.
Repair or replace filter and/or fuel line.
Replace the fuel. See page 8.
Consult with an authorized servicing dealer.
Engine is knocking.
Overheating condition.
Improper fuel.
Carbon deposits in the combustion
chamber.
Valve clearance set incorrectly.
See above.
Check fuel octane rating; check for presence of
alcohol in the fuel (pg. 8). Refuel as necessary.
Consult with an authorized servicing dealer.
LOW POWER OUTPUT
ADDITIONAL PROBLEMS
Page 17
Troubleshooting Guide (continued)
Poor acceleration.
Clogged air filter.
Clogged fuel filter.
Lean fuel/air mixture.
Idle speed set too low.
Clean the air filter.
Replace the fuel filter.
Consult with an authorized servicing dealer.
Adjust: 3,000 (5300) rpm (min-1)
Symptom Possible Cause Remedy
Engine stops abruptly.
Switch turned off.
Fuel tank empty.
Clogged fuel filter.
Water in the fuel.
Shorted spark plug or loose terminal.
Ignition failure.
Piston seizure.
Reset the switch and restart.
Refuel. See page 8.
Replace fuel filter.
Drain; replace with clean fuel. See page 8.
Clean and replace spark plug, tighten
the terminal.
Replace the ignition unit.
Consult with an authorized servicing dealer.
Engine difficult to shut of f.
Ground (stop) wire is disconnected or
switch is defective.
Overheating due to incorrect spark plug.
Overheated engine.
Test and replace as required.
Idle engine until cool.
Clean and regap the plug to 0.024 - 0.028
inch (0.6 - 0.7 mm). Correct plug: NGK CMR5H
or equivalent resistor type spark plug of the
correct range.
Idle engine until cool.
Cutting attachment
rotates at engine idle.
Engine idle too high.
Broken clutch spring or worn clutch
spring boss.
Loose attachment holder.
Set idle: 3,000 (±300) rpm (min-1)
Replace spring/shoes as required, check
idle speed.
Inspect and re-tighten holders securely.
Engine will not idle down.
Engine idle set too high.
Engine has an air leak.
Set idle: 3,000 (±300) rpm (min-1)
Consult with an authorized servicing dealer.
Top of engine is getting
dirty and oily.
Valve cover is leaking. Consult with an authorized servicing dealer.
Excessive vibration.
Warped or damaged cutting attachment.
Loose gearcase.
Bent main shaft/worn or damaged
bushings.
Trimmer line not wound properly on spool.
Inspect and replace attachment as required.
Tighten gearcase securely.
Inspect and replace as necessary.
Rewind trimmer line.
Cutting attachment will
not move.
Shaft not installed in powerhead or
gearcase.
Broken shaft.
Damaged gearcase.
Inspect and reinstall as required.
Consult with an authorized servicing dealer.
ADDITIONAL PROBLEMS
ADDITIONAL PROBLEMS
17
Page 18
18
The following statement only applies to United States and its territories
Shindaiwa Corporation
Federal Emission Design And Defect Limited Warranty
Utility And Lawn And Garden Engines
Shindaiwa Corporation warrants to the initial purchaser and each
subsequent owner, that this utility equipment engine (herein
engine) is designed, built and equipped to conform at the time of
initial sale, to all applicable regulations of the U.S. Environmental
Protection Agency (EPA), and that the engine is free of defects in
materials and workmanship that would cause this engine to fail
to conform with EPA regulations during its warranty period. This
emission warranty is applicable in all States, except the State of
California.
For parts listed under PAR TS COVERED, the dealer authorized
by Shindaiwa Corporation will, at no cost to you, make the necessary diagnosis, repair, or replacement of any defective emission-related component to ensure that the engine complies with
applicable U.S. EPA regulations.
MANUFACTURERS WARRANTY COVERAGE
When sold within the U.S., this engine’s emission control system is
warranted for a period of two (2) years from the date this product is first
delivered to the original retail purchaser.
OWNER’S WARRANTY RESPONSIBILITIES
As the engine owner, you are responsible for the performance of the
required maintenance listed in your owner’s manual. Shindaiwa Corporation recommends that you retain all receipts covering maintenance on
your engine, but Shindaiwa Corporation cannot deny a warranty claim
solely for the lack of receipts or for your failure to ensure the performance of all scheduled maintenance.
As the engine owner, you should however be aware that Shindaiwa
Corporation may deny your warranty coverage if your engine or a part
has failed due to abuse, neglect, improper maintenance or unapproved
modifications.
You are responsible for presenting your engine to the nearest dealer
authorized by Shindaiwa Corporation when a problem exists.
If your Shindaiwa Dealer is unable to answer questions regarding your
warranty rights and responsibilities, you should then contact your
Shindaiwa Distributor.
For the name and telephone number of the Shindaiwa Distributor in your
area, please call Shindaiwa Inc. at (503) 692-3070 between the hours of
8:00 AM and 5:00 PM Pacific Standard Time.
PARTS COVERED
Listed below are the parts covered by the Federal Emission Design and
Defect Warranty. Some parts listed below may require scheduled maintenance and are warranted up to the first scheduled replacement of that
part. The warranted parts include:
1. Carburetor Internal Components
• Valve Assembly-throttle, Jet, Metering Diaphragm
2. Ignition System Components
• Ignition Coil
• Flywheel Rotor
The emission control system for your particular Shindaiwa engine may
also include certain related hoses and connectors.
MAINTENANCE AND REPAIR REQUIREMENTS
You are responsible for the proper use and maintenance of the engine.
You should keep all receipts and maintenance records covering the
performance of regular maintenance in the event questions arise. These
receipts and maintenance records should be transferred to each subsequent owner of the engine. Shindaiwa Corporation reserves the right to
deny warranty coverage if the owner has not properly maintained the
engine. Shindaiwa Corporation will not deny warranty repairs, however,
solely because of the lack of repair, maintenance or failure to keep maintenance records.
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 SHINDAIWA CORPORATION 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.
If other than the parts authorized by Shindaiwa Corporation are used
for maintenance replacements or for the repair of components affecting
emission control, you should assure yourself that such parts are warranted by their manufacturer to be equivalent to the parts authorized by
Shindaiwa Corporation in their performance and durability.
OBTAINING WARRANTY SERVICE
All repairs qualifying under this limited warranty must be per formed by a
dealer authorized by Shindaiwa Corporation
If any emission-related part is found defective during the warranty
period, it is your responsibility to present the product to an authorized
Shindaiwa dealer. Bring your sales receipts showing the date of purchase for this engine. The dealer authorized by Shindaiwa Corporation
will perform the necessary repairs or adjustments within a reasonable
amount of time and furnish you with a copy of the repair order. All parts
and accessories replaced under this warranty become the proper ty of
Shindaiwa Corporation
To locate an authorized Shindaiwa dealer near you, contact your
Shindaiwa Distributor. For the name and telephone number of the
Shindaiwa Distributor in your area, please call Shindaiwa Inc. at (503)
692-3070 between the hours of 8:00 AM and 5:00 PM Pacific Standard
Time.
THIS WARRANTY IS ADMINISTERED BY
Shindaiwa Inc.
11975 S.W. Herman Rd.
Tualatin OR. 97062
(503) 692-3070
LIMITATIONS
The Federal Emission Design and Defect Warranty shall not cover any of
the following:
(a) conditions resulting from tampering, misuse, improper adjust-
ment (unless they were made by the dealer or service center
authorized by Shindaiwa Corporation during a warranty repair),
alteration, accident, failure to use the recommended fuel and oil,
or not performing required maintenance services,
(b) the replacement parts used for required maintenance services,
(c) consequential parts used for required maintenance services,
(d) diagnosis and inspection fees that do not result in eligible war-
ranty service being performed, and
(e) any non-authorized replacement part, or malfunction of autho-
rized parts due to use of non-authorized par ts.
Page 19
NOTES
19
Page 20
Shindaiwa Inc.
11975 S.W. Herman Rd.
Tualatin, Oregon 97062 USA
Telephone: 503 692-3070
Fax: 503 692-6696
www.shindaiwa.com
Shindaiwa Corporation
Head Office:
6-2-11, Ozuka-Nishi
Asaminami-Ku, Hiroshima
731-3167, Japan
Telephone: 81-82-849-2220
Fax: 81-82-849-2481
© 2007 Shindaiwa, Inc.
Part Number 68800-94313
Revision 3/07
Printed in Japan
Shindaiwa Tornado is a trademark,
and Shindaiwa is a registered trademark
of Shindaiwa, Inc.
Specifications subject to change without notice.
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