Shindaiwa HT230 Owner's manual

HT230/DH230 HEDGE TRIMMER
Part Number 62821-94310 Rev. 8/04
WARNING! l Read this manual and familiarize yourself with its contents.
l This machine is designed for trimming hedges.
l Do not use this machine for other purposes.
l Minimize the risk of injury to yourself and others.
l Do not operate or service this machine unless you clearly
understand this manual.
l Keep this manual accessible so that you can reread it
whenever you have a question about its use.
SHINDAIWA OWNER’S/OPERATOR’S MANUAL
HT230
DH230

2
PAGE
Introduction...............................................2
Attention Statements ................................2
Safety Precautions..................................... 3
General Safety Instructions ....................4
Operational Precautions ..........................5
Operating the Hedge Trimmer................5
Specifications ............................................6
Product Description .................................6
Assembly....................................................7
Throttle Cable Adjustment....................... 9
Mixing Fuel ...............................................9
Filling the Fuel Tank ..............................10
Starting Procedure.................................. 10
Starting a Flooded Engine .....................11
Stopping the Engine ...............................12
Engine Idle Adjustment .........................12
General Maintenance ............................. 12
Long Term Storage.................................14
Muffler Maintenance.............................. 15
Cutter Blade Adjustment........................15
Troubleshooting Guide .......................... 16
Declaration of Conformity .....................19
Contents
Throughout this manual are special “at-
tention statements” surrounded by boxes
and preceded by the triangular Attention
Symbol.
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 prevent
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.
Introduction
The Shindaiwa HT230/DH230 series of
hand power tools has been designed and
built to deliver superior performance
and reliability without compromise to
quality, comfort, or durability. Shindaiwa
high performance engines represent the
leading edge of 2-cycle engine technology,
delivering exceptionally high power at
remarkable low displacement and weight.
As an owner/operator, you’ll soon discover
for yourself why Shindaiwa is simply in a
class by itself!
IMPORTANT!
The information contained in this manual
describes machines available at the time
of publication.
While every attempt has been made to give
you the very latest information about your
Shindaiwa product, there may be some dif-
ferences between your machine and what
is described here. Shindaiwa reserves the
right to make changes to products without
prior notification, and without obligation to
make alterations to machines previously
manufactured.
Read and follow this
manual and make sure
anyone using the hedge
trimmer does likewise.
Failure to do so could
result in serious in-
jury or machine failure.
Keep this manual for
future reference.
Always wear eye and
hearing protection dur-
ing the operation of this
hedge trimmer. A hard
hat will provide addi-
tional security against
falling debris.
Sound Power Level
(measure in accordance
with 2000/14/EC)
IMPORTANT!
The operational procedures described
in this manual are intended to help you
get the most from your machine, and
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 machine, or if you do not understand
something in this manual, your Shindaiwa
dealer will be glad to assist you.

3
WARNING!
n Do not operate the hedge trimmer if
you are tired, ill, or under the inu-
ence of alcohol, drugs, or medication.
nKeep bystanders at least 5 meters
(15 feet) away from the working
area during operation to reduce
their risk of being cut by the cutters
or struck by thrown debris. Stop
working immediately if a person,
especially a small child or animal
comes within the 5 meters zone.
nThe blades are sharp-handle them
with care! Wearing heavyduty
gloves will go a long way toward
protecting your hands.
n Keep your hands clear of the cutter
blades when starting the engine,
and anytime the engine is running.
n THIS MACHINE CAN CAUSE
SERIOUS INJURIES. Read
the instructions carefully for the
correct handling, preparation,
maintenance, starting and stopping
of the machine. Be familiar with all
controls and the proper use of the
machine.
WARNING!
The blades are SHARP!
Handle with care.
Keep hands clear of the cutter blades
when starting the engine. Do not oper-
ate this machine if you are tired, ill, or
under the inuence of alcohol, drugs,
or medicine.
Safety Precautions
WARNING!
The engine exhaust from this
product contains substances
which are harmful to your health.
WARNING!
THE HEDGE TRIMMER IS
NOT INSULATED AGAINST
ELECTRICAL SHOCK!
Approaching or contacting an electric
fence, power line or other electried
object could cause death or serious
injury.
Keep the hedge trimmer at least 10
meters (33 feet) away from electried
objects or branches that contact them.

4
General Safety Instructions
DH2317
Note the locations of fence posts and
other xed objects and avoid cutting
them.
Always wear hearing protection such as
earmuffs or earplugs.
Secure long hair so it is above
shoulder level.
Do not wear jewelry or loose
clothing that could get caught
in machinery or brush.
Make sure handgrips
are free of forign
substances such as
lubricant and pitch.
Wear appropriate clothing. It
should t snugly to minimize snagging
yet permit free movement.
Never wear shorts when operating the
hedge trimmer.
Inspect the cutting site thoroughly
prior to operation. Remove objects
that could get entangled by
the cutter blade.
Always wear eye protection such as
goggles or safety glasses.
Non-skid gloves provide a rm grip,
added protection to your hands,
and are strongly recommended.
Avoid cutting large or
extremely woody branches.
Doing so can shorten cutter
life and damage the gearcase.
Before moving to another
job site, stop the engine and
install the blade cover.
Always operate with both hands
rmly gripping the handgrips of the
machine.
Do not allow the cutters to
contact buildings or other hard
objects during operation.
Never operate this
machine if any safety
guards are missing or
damaged.
Avoid long-term operation
in very hot or very cold
weather.
If a cutter should bind
fast in a cut, stop the
engine immediately.
Remove the cause of the
bind before proceeding.
Never cut metal objects
or wire with the blade.
Always keep a proper footing and do not overreach.
Maintain your balance at all times during operation especially when
using steps or a ladder.
Wear appropriate footwear such as non-skid boots or shoes.
Never work barefooted or wear open-toed shoes or sandals.
Always be aware of your surroundings
and stay alert for possible hazards that
you may not hear due to the noise of the
machine.
Never allow children to use the
machine. Avoid operating near
bystanders.

5
nNEVER allow any person to
operate this hedge trimme who
has not been properly trained or
instructed.
nNEVER smoke or light res near
the hedge trimmer. Keep the
hedge trimmer away from exces-
sive heat. Engine fuel is very
ammable!
nBefore starting the engine move
3 meters (10 feet) away from the
fuel storage area or other readily
ammable materials. Do not put
ammable materials close to the
mufer.
nNEVER run the engine indoors,
Make sure there is always good
ventilation when running the
engine. Engine exhaust contains-
deadly poisonous carbon monox-
ide gas.
nALWAYS stop the engine before
refueling, and let the engine cool-
before refueling.
WARNING!
nSqueezing the throttle increases engine
speed, causing the clutch to engage and
operate the cutters.
nReleasing the throttle decreases engine
speed, causing the cutters to slow,
and then stop altogether as the clutch
disengages.
Operation of the Hedge Trimmer
nUse a sweeping motion when cutting,
and vary throttle settings often.
nTrim the hedge swinging the blade as
the illustration shows. At vertical cut-
ting the hedge trimmer is used with
circular pendulation, swinging up and
down close to the hedge.
n Avoid cutting material larger than 1.2
cm (1/2 inch) in diameter. Do not cut
metal objects or wire.
nSpeed adjustment, turning the maxi-
mum speed adjustment dial counter-
clockwise decreases the engine speed
when the throttle is fully squeezed.
Adjust the maximum engine speed to
suit your work. (The maximum speed
adjustment dial is preset on its maxi-
mum speed position at the factory.)
Operational Precautions
Reduce Speed
nDo not overll the fuel tank. Wipe
off any spilled fuel immediately.
After refueling, inspect the tank
to make sure its cap is threaded
on properly. Make sure there are
no fuel leaks.
nStop the engine immediately if
thehedge trimmer suddenly be-
gins to vibrate or shake. Inspect
for broken, missing, or improperly
installed parts or components.
Correct the problem before return-
ing the hedge trimmer to service.
nALWAYS disconnect the spark
plug wire before performing any
maintenance work.
nALWAYS maintain the hedge
trimmer according to this owner’s
manual and follow the recom-
mended maintenance schedule.
nNEVER modify or disable any
of the hedge trimmer’s safety
devices.
nALWAYS use genuine Shindaiwa
parts and accessories when
repairing or maintaining this
hedge trimmer. These compo-
nents have been manufactured
specically for use on this unit and
meet the specications for perfor-
mance and safety.
nMake sure the cutters are correctly
adjusted before operating the
hedge trimmer.
nNEVER attempt to adjust the cut-
ter with the engine running.
nNEVER use a cracked or broken
cutter or cutter bar; replace it with
a new or serviceable one.
nMake sure the powerhead is clean
and that the engine cooling ns
and mufer are unobstructed and
free of debris and loose vegeta-
tion.
nDo not operate the hedge trimmer
with the mufer removed.
nWhen transporting or storing the
hedge trimmer, make sure the
blade cover is attached to the
cutter.
nAlways ensure all handles and
guards are attached and secure
when using the machine.

6
Specications
Familiarize yourself with your machine and its various components. Understanding your machine helps ensure top performance,
long service life, and safer operation.
HT230/EC1-30 DH230/EC1-24
SHT230EC
2-cycle, horizontal cylinder, air cooled
5.6 kg 5.7 kg
32mm x 28mm
22.5 cm3
8,000 min-1 (rpm)
0.75 kW
3,000 min-1 (rpm)
11,500 min-1 (rpm)
50:1
600 cm3
Walbro, WYJ
Fully Electronic, transistor controlled
NGK BMR6A
Semi-wet Type
Recoil Starter
Slide Switch
1070 x 260 x 220mm 1080 x 250 x 210mm
74 dB (A)
96 dB (A) 97dB (A)
84 dB (A) 86 dB (A)
105 dB (A)
5.7/6.5m/s23.8/4.8m/s2
6.8/8.7m/s27.2/10.7m/s2
Model Name.......................................................................................................................
Engine Model.........................................................................................................
Engine Type .......................................................................................................................
Dry Weight (excluding cutting attachment)...................................................................
Bore x Stroke......................................................................................................................
Displacement......................................................................................................................
Engine Speed at Maximum Power Output......................................................................
Maximum Power Output ..................................................................................................
Engine Speed at Idling ......................................................................................................
Maximum Engine Speed...................................................................................................
Fuel/Oil Ratio.....................................................................................................................
Fuel Tank Capacity ............................................................................................................
Carburator...........................................................................................................................
Ignition System ..................................................................................................................
Spark Plug...........................................................................................................................
Air Cleaner..........................................................................................................................
Starting Method.................................................................................................................
Stopping Method................................................................................................................
Dimensions (L x W x H) ...................................................................................................
Sound Pressure Level *...........................................................................................Idling
Racing
Sound Power Level * ...............................................................................................Idling
Racing
Vibration Level (Front/Rear)* .............................................................................Idling
Racing
*Sound PressureLevel: in accordancewith ISO11201 *Sound PowerLevel:in accordance withISO3744 *Vibration Level:inaccordancewithEN28662-1
Product Description
Prior to Assembly
Before assembling this product, please
make sure you have all the components
required for a complete unit:
nEngine assembly (powerhead)
nCutter and gearcase assembly
nRear handle
nFront handle
nBolt package
n Tool kit including, allen wrenches,
screwdriver, combination spark plug/
13mm wrench, 8mm and 10mm wrench
(HT230 only).
Carefully inspect all components for
damage.
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 of this product.
IMPORTANT! WARNING!
Do not make unauthorized
modications or alterations
to this machine or any of its
components or accessories.
DH230
HT230
Guide Bar Front Handle
Safety Guard
Cutter
Speed Adjustment Dial
Throttle Rear Handle
Recoil Starter
ON-OFF
Switch Fuel Cap
Cover
Fuel Tank Gearcase
Air Cleaner Cover
Choke
ON-OFF
Switch
Fuel Cap
Cover
Fuel Tank
Air Cleaner Cover
Choke
Protector
Guide Bar Front Handle
Safety Guard
Cutter
Mufer
Throttle
Trigger
Rear
Handle
Recoil Starter

7
Assembly
1) Temporarily remove the 5mm x 12mm
index bolt.
2) Loosen, but do not remove, the 5mm x
25mm clamp screw, and verify that the
D- washer (shim) is oriented as shown.
3) Position the rear handle assembly as
shown. Starting from the rear of the
trimmer, push the throttle cable, igni-
tion wire, and ground wire through the
handle mounting bracket.
4) Slide the rear handle into the handle
mounting bracket until it bottoms. Use
care to avoid pinching or otherwise
damaging the wires and cable installed
in Step 3.
nAlign the hole in the rear handle with
the matching hole in the handle mount-
ing bracket, and then install and firmly
tighten the 5mm x 12mm index bolt.
n Tighten the 5mm x 25mm clamp screw
firmly.
HT230
(a) Attaching the Rear Handle
to the Gearcase Orient the gearcase assembly to the
powerhead as shown, and secure with the
three 6mm x 16mm screws.
1) Securely tighten Screws A and B.
2) Push Screw C through the eye terminal
in the throttle control ground wire, and
then install and firmly tighten the screw
to the powerhead.
(b) Installing the Powerhead on the
Gearcase
IMPORTANT!
Improper shoulder bolt adjustment can
shorten gearcase life drastically! Blade
durability and cutting performance are
affected by shoulder bolt adjustment.
(c) Install the Front Handle
The front handle is installed over a 5mm
stud on the guide bar, as well as a special
6mm x 30mm shoulder bolt assembly
that is also used for guide bar adjustment.
When installing the front handle, it is
extremely important to maintain correct bar
adjustment as described below:
1) Install the 5mm flange nut over the stud
on the guide bar, and then tighten the
nut firmly.
2) Hand-tighten the shoulder bolt, and
then loosen the shoulder bolt 1/2- turn.
3) Install the 6mm washer and lock nut on
the shoulder bolt but do not tighten the
lock nut at this time.
4) While holding the shoulder bolt with a
wrench, firmly tighten the lock nut.
Rear Handle
Assembly
Index Bolt
D-washer
Throttle Cable,
Ignition, and
Ground Wires
Clamp Screw
WARNING!
Incorrect assembly could expose the operator to serious injury! Read
and follow assembly instructions carefully.
Powerhead
Screw C
Screws A
and B
5mm
Flange
Nut
6mm Nut
and Washer
Front
Handle
Stud
Shoulder Bolt
(adjust from below)

8
DH230
(1) Attaching the Rear Handle
to the Gearcase Assembly
1) Slide the rear handle onto the rear flange of
the cutter/gearcase assembly. Make sure
the throttle cable and ignition and ground
wires do not bind during assembly.
2) Make sure the mating holes between the
rear handle and the gearcase are aligned,
then secure the rear handle using two
6mm x 35mm socket head cap screws and
washers.
IMPORTANT!
The washers used on the front handle
and the rear handle are not the same.
The washers for the rear handle are black
for identication.
Incorrect
assembly
could expose
the operator
to serious
injury! Read
and follow
assembly
instructions
WARNING!
Collar
Rear
Handle
Cushion
Cushion
Before attaching the rear handle,
make sure the rear handle
cushions are located correctly.
Viewed from
the bottom
Throttle Cable,
Ignition and Ground
Wires
Rear Handle
Assembly
Cutter/Gearcase
Assembly
6mm x 35mm
Socket Head
Capscrews and
Washers (washers
black for identication)
(2) Install the Front Handle
1) Locate the front handle onto the cutter/
gearcase assembly as shown.
2) Secure the handle using two 6mm x 35mm
socket head capscrews and washers.
(3) Installing the Powerhead on
the Gearcase
Orient the gearcase assembly and power-
head as shown and secure with the three
6mm x 16mm screws (Screws A, B, and C).
1) Securely tighten Screws A and B.
2) Push Screw C through the eye termi-
nal in the throttle control ground wire
(black), and then install and firmly
tighten the screw to the powerhead.
6mm Nuts and Washers
Front Handle
Screw C
(6 x 16mm)
Powerhead
Screws A and B
(6 x 16mm)

9
1) Loosen the air cleaner cover retaining
screw, and remove the air cleaner cover.
2) Working from the bottom of the trimmer,
push the throttle cable through the cable
adjustment fitting. Rotate the carburetor
throttle about 450and place the cable
terminal in the throttle fitting.
3) Measure free play at the end of the
throttle lever. If necessary, turn the cable
adjustment fitting in or out until throttle
lever free play is approximately 5-10mm
(0.2-0.4 inch).
4) Firmly connect the two ignition wires
as shown and tuck the wire behind the
gasket.
5) Replace the air cleaner cover, and tighten
the cover retaining screw securely.
Throttle Cable Adjustment
Mixing Fuel
n When mixing fuel, combine 2-cycle
Engine Oil with gasoline at a ratio of 50:1.
nUse only fresh, clean unleaded gasoline
with an octane rating of 87 or above.
CAUTION!
n This engine is certied to operate on
a 50:1 mixture consisting of un-
leaded gasoline and 2-cycle mixing
oil only.
nSome motor fuels contain alcohol as
an oxygenate! Oxygenated fuels
may cause increased operating
temperatures. Under certain condi-
tions, alcohol-based fuels may also
reduce the lubricating qualities of
some mixing oils.
nNever use any fuel containing more
than 10% alcohol by volume! When
an oxygenated fuel must be used, a
fuel containing MTBE is to be pre-
ferred over an alcohol based fuel.
Throttle Lever Free Play
HT230 DH230
5 ~ 10mm
(0.2 ~ 0.4”) 5 ~ 10mm
(0.2 ~ 0.4”)
Throttle Fitting
Air Cleaner Cover
Throttle Cable
Adjuster
Ground Wire
Screw C
Ignition Wire
(red)
Ignition Wire
Connection
Throttle Cable
Terminal
Gasket
The Hedge Trimmer should now be assembled.
nGeneric oils and some outboard mo-
tor oils may not be intended for use
in high-performance air cooled 2-
cycle engines, and should never be
used in your Shindaiwa trimmer!
n Mix only enough fuel for your imme-
diate needs! If fuel must be stored
longer than 30 days, it should rst
be treated with a stabilizer such as
StaBil™.

10
Filling the Fuel Tank
WARNING!
Minimize the risk of re!
Handle fuel with extreme care since
it is highly ammable!
nAlways allow the engine to cool
before refueling!
nWipe all spilled fuel and move the
machine at least 3 meters (10 feet)
from the fueling point before re-
starting!
WARNING!
Do not inhale fuel fumes as
they are toxic!
1. Place the unit on the ground or on a flat
surface.
2. Clear any dirt or other debris from around
the fuel filler cap.
3. Remove the fuel cap slowly, and fill the
fuel tank with clean, fresh fuel mixture.
4. Replace and firmly tighten the fuel cap.
5. Wipe up any spilled fuel from the power-
head before starting the engine.
Starting Procedure
IMPORTANT!
Engine ignition is controlled by a two-po-
sition switch mounted on the throttle body
labeled “I” for ON or START and “O” for
OFF or STOP.
2. Set the throttle lever to the “fast idle” posi-
tion by performing the following.
4. Move the choke lever forward to the
“closed” position to choke the engine.
WARNING!
KEEP CLEAR OF THE CUTTING
ATTACHMENT DURING STARTING
OPERATIONS! THE CUTTERS MAY
MOVE WHEN THE ENGINE IS
STARTED
nPlace the trimmer on the ground
during all starting operations.
nMake sure you have a secure foot-
ing, and keep a rm grip on the
machine as well.
nKeep all bystanders and pets well
clear of the trimmer during starting
operations.
a. Depress and hold the throttle lockout
lever, then squeeze the throttle lever.
b. Depress and holdthe throttlelock button.
c. While depressing the throttle lock but-
ton, release the throttle lockout lever and
throttle lever.
Control Positions (Cold Engine)
1. Move the ignition switch rearward to the
“I” or START position.
Ignition ON
Ignition Switch
HT230
DH230
Ignition ON
Ignition
Switch
HT230
DH230
Throttle
Lock
Fast Idle
Button
Throttle Trigger
Fast Idle
Button
Throttle
Lock
Throttle
Trigger
Primer Bulb (viewed
from rear)
Choke Closed
nNever smoke or light any res near
the unit or fuels!
nNever place any ammable material
near the engine mufer!
nNever operate the unit without the
mufer in place and properly func-
tioning!
nNever operate the unit if fuel system
components are damaged or are
leaking.
3. Prime the carburetor by depressing the
carburetor primer bulb 4 or 5 times until
you see clear fuel flowing through the
transparent primer bulb.

11
Control Positions
1. Move the ignition stop switch rearward to
the “I” or START position.
2. Set the throttle lever to the “fast idle” posi-
tion as in Step 2, previous page.
3. Move the choke lever back (rearward)
to the “open” position.
Start the Engine
CAUTION!
The recoil starter can be easily dam-
aged by abuse.
nAlways engage the starter before at-
tempting to crank the engine.
nNever pull the starter cord to its full
length.
nAlways rewind the starter cord slowly.
1. Place the machine on the ground. Grip the
engine cover with your left hand and the
starter handle with your right hand.
2. Pull the starter handle slowly toward you
until you feel the starter mechanism
engage.
3. Start the trimmer by pulling the starting
handle rapidly outward.
When the engine starts or res...
1. Open the choke by moving the choke
lever backward (toward the fuel tank).
2. If the engine does not continue to run,
repeat the appropriate starting proce-
dures for a cold or warm engine.
3. When the engine starts, clear excess fuel
from the combustion chamber by accel-
erating the engine several times with the
throttle lever.
4. Operating the throttle will automatically
disengage the fast idle setting.
If the engine does not start
nRepeattheappropriate startingprocedure
for a cold or warm engine.
nIf the engine still fails to start, use the pro-
cedures for “Starting a Flooded Engine”.
1. Disconnect the spark plug lead, then use
the spark plug wrench to remove the
sparkplug (counterclockwisetoremove).
3. Set the ignition switch to the “O ” or
STOP position and open the choke. Fully
depress the throttle lever with your left
hand and pull the starter handle rapidly
with your right hand several times to
clear excess fuel from the engine com-
bustion chamber.
Starting a Flooded Engine
4. Replace the spark plug and tighten it
firmly with the spark plug wrench. If a
torque wrench is available, torque the
spark plug to 16.7-18.6 N∙m (170-190
kg-cm).
5. Repeat the starting procedures for a
warm engine.
6. If the engine still fails to start or fire,
refer to the troubleshooting chart at
the end of this manual.
(Warm Engine)
WARNING!
The cutting attachment will
move when the engine ac-
celerates!
CAUTION!
Incorrect spark plug installation can
result in serious engine damage!
WARNING!
Move the ignition switch
forward to the “O” or STOP
position.
WARNING!
Burn danger from hot engine!
Allow engine to cool before
removing spark plug.
2.Ifthe spark plug isfouledorissoaked with
fuel, clean or replace the plug as neces-
sary. For spark plug specifications and
gapping procedure. See Page 13.
Choke Open
Cover
Spark Plug
Lead
Spark Plug
STOP
Position
Choke Open

12
WARNING!
Non-standard parts may
not operate properly with
your unit and may cause damage
and lead to personal injury.
Stopping the Engine
1. Cool the engine by allowing it to idle for
2 - 3 minutes.
2. Move the ignition switch forward to the
“O” or STOP position.
Engine Idle Adjustment
WARNING!
The cutters must NEVER
engage at engine idle speeds!
If the idle speed cannot be
adjusted by the procedure described
here, return the trimmer to your dealer
for inspection.
The engine must return to idle speed when-
ever the throttle lever is released. Idle speed
is adjustable, and must be set low enough to
permit the engine clutch to disengage the
cutters.
Idle Speed Adjustment
1. Place the unit on the ground, then start
the engine and allow it to idle 2-3 min-
utes until warm.
3. If a tachometer is available, the engine idle
speed should be adjusted to 3,000 min-1
(rpm).
4. Carburetor fuel mixture adjustments are
preset at the factory and cannot be ser-
viced in the field.
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 SHINDAIWA KOGYO CO., LTD.
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.
General 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 maintnenance work.
NOTE:
Using non-standard replacement parts could
invalidate your Shindaiwa warranty.
WARNING!
The cutters can continue
oscillating after the engine is
switched off.
WARNING!
Know how to stop the machine
quickly in an emergency.
Ignition Switch
Ignition Stop (O)
HT230
DH230
Ignition Stop (O)
Ignition Switch
Reduce Idle
Speed
Idle Adjustment Screw
2. If the cutters move when the engine is at
idle, reduce idle speed by turning the idle
adjustment screw counterclockwise.

13
Prior to each work day, perform the following:
WARNING!
To reduce re hazard, keep
the engine and mufer free of
debris, leaves, or excessive grease.
nLubricate the cutters with oil before
use, and after refueling.
nCheck the cutters for damage or
improper adjustment, and adjust or
replace as necessary.
nCarefully remove any accumulations
of dirt or debris from the muffler and
fuel tank. Dirt build-up in these areas
can lead to engine overheating, fire, or
premature wear.
Mufer
This unit must never be operated with a
faulty or missing spark arrester or muf-
fler. 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.
Spark Plug
Keep the spark plug and wire connections
tight and clean.
Fasteners
Make sure nuts, bolts, and screws (except
carburetor adjusting screws) are tight.
Daily Maintenance
Clean debris from
tank and mufer
Inspect cooling
ns, and clean as
required
Clean around
spark plug
Lubricate
cutters
Check cutters for
damage and correct
adjustment
Inspect/clean air lter
element
10-15 Hour Maintenance
Every 10 hours of operation, (more
frequently in dusty or dirty conditions):
Remove the air cleaner element from the
air cleaner housing and clean it thoroughly
with soap and water. Rinse and dry
thoroughly. Add a few drops of oil and
work it in, then reassemble.
Every 10 to 15 hours of operation:
nRemove and clean the spark plug.
Adjust the spark plug electrode gap to
0.6 mm (0.024-inch). If the plug must be
replaced, use only:
NGK BMR6A or an equivalent spark
plug of the correct heat range.
Clean the spark plug and check the
gap at the electrode.
0.6 mm
(0.024 inch)
CAUTION!
Do not operate the unit if the air
cleaner or element is damaged, or if
the element is wet.
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.
Air Cleaner
Element
Air Cleaner
Cover
Cover
Clean Debris
Keep intake
clean
Keep cooling
ns clean
nClean any debris or dirt from the hedge
trimmer cutter blades. Lubricate the
blades before use and after refueling.
Check the cutters for damage or incor-
rect adjustment.
nCheck for loose or missing screws or
components. Make sure the cutter at-
tachment is securely fastened.
nCheck the entire unit for leaking fuel or
grease.

14
Gearcase Lubrication Schedule
Every 20 Hours
Connect a grease gun to the grease fitting
on the left side of the gearcase. Top off
the gearcase grease level by adding a
high quality lithium-based grease. Three
pumps of the grease gun handle should
be adequate. DO NOT OVERFILL THE
GEARCASE!
Long Term Storage
nThoroughly clean the exterior of the
machine.
nRemove all clippings and other debris
from the cylinder fins and other
components (as previously described
under Daily Maintenance).
nDrain all unused fuel from the fuel tank,
and then clear the carburetor and fuel
lines by running the trimmer until it
stops from lack of fuel.
IMPORTANT!
All stored fuel should be stabilized with
fuel stabilizer such as STA-BIL™
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.
50-Hour Maintenance
Remove the gearcase cover. Use solvent
and a soft brush to remove all old grease
from the gearcase. To refill, hand-pack
the gearcase with approximately 40–50
grams of high quality lithium-based grease
(50–70% of capacity). DO NOT OVERFILL!
nUse a hooked wire to extract the fuel
filter from inside the fuel tank. 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.
(30 days or longer)
CAUTION!
Over-lubricating may cause the
gearcase to run slower than normal,
and may also cause leakage from
excess grease.
CAUTION!
Never store this unit with any fuel
remaining in the tank, fuel lines or
carburetor!
NOTE:
Your Shindaiwa warranty does not include
coverage for damage caused by stale or
contaminated fuels.
nRemove the spark plug, and pour about
7 grams of 2-cycle mixing oil into the
cylinder through the spark plug hole.
Before reinstalling the spark plug,
slowly pull the recoil starter 2–3 times to
distribute the oil over the cylinder wall.
nService the air cleaner element as
previously described in the daily
maintenance section of this manual.
n Repair or replace any damaged
components as required, and then store
the unit in a clean, dry, and dust-free area.
(more frequently in dusty or dirty
conditions or before long-term storage):
VIEWED FROM THE BOTTOM
Gearcase
Grease
Fitting
VIEWED FROM THE BOTTOM
DO NOT REMOVE
CONRODS!
Gearcase
Cover
socket-head
Capscrews
Hooked
Wire
Filter Element

15
Cutter Blade Adjustment
Cutter performance of this unit depends in
great measure on cutter blade clearance.
Properly adjusted blades will oscillate
freely yet help prevent binding of cut
material between blades. Adjust blades as
follows:
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.
Guide Bar Locknut
Cutter Blades
Shoulder
Bolt
Washer
(should turn
freely)
Seasonally (or whenever you
experience hard starting or poor
performance):
WARNING!
Never operate this machine
with a damaged or missing
mufer or spark arrester!
Operating with missing or damaged
exhaust components is a re hazard,
and may also damage your hearing.
nHard starting or a gradual loss of
performance can be caused by carbon
deposits lodged in the muffler’s spark
arrester screen. Remove the spark
arrester screw and remove the screen
from the muffler with the point of a
small pliers. Thoroughly clean the
screen with a stiff bristle brush. A
damaged or otherwise unserviceable
screen must be replaced. Reinstall by
gently tapping the screen into place and
retightening the screw.
nIf carbon accumulations in the muffler
or cylinder are severe or if you do not
notice an improvement in performance
after servicing, return the trimmer to
your Shindaiwa dealer for inspection.
Mufer Maintenance
WARNING!
The cutter blades are very
sharp! Always wear gloves when
working around the cutter assembly!
Mufer
Arrester Screen
Arrester
Screw
CAUTION!
Operating the hedge trimmer with worn
or improperly adjusted cutters will re-
duce cutter performance and may also
damage this unit.

16
Engine Does Not Start
Troubleshooting Guide
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 is old or contaminated.
Clogged fuel lter and/or vent.
Carburetor primer failure.
The ignition switch is in OFF ("O").
Faulty ignition ground.
Faulty transistor unit.
If the plug is wet, excess fuel may be in
the cylinder.
The plug may be fouled or improperly
gapped.
The plug may be damaged internally or
is the wrong size.
Consult with an authorized Shindaiwa dealer.
Tighten and re-test.
Consult with an authorized Shindaiwa dealer.
Rell with clean fresh unleaded gasoline
with a pump octane of 87 or higher, mixed
with a Premium 2-cycle Engine Oil at a
50:1 gasoline/oil ratio. Re-start.
Clean or replace lter/vent as required.
Re-start.
Consult with an authorized Shindaiwa dealer.
Move switch to ON ("I") and re-start.
Consult with an authorized Shindaiwa dealer.
Crank the engine with the plug removed
and the ignition switch off. Replace the
plug, and re-start.
Clean and re-gap the plug to 0.024 inch
(0.6mm). Re-start.
Replace the plug with a NGK BMR6A.
Re-start.
NO
NO
NO
NO
NO
What to check Possible Cause Remedy

17
Is the engine overheating?
Engine is rough at all speeds.
May also have black smoke
and/or unburned fuel at the
exhaust.
Engine is knocking.
Operator is overworking the unit.
Carburetor mixture is too lean.
Improper fuel/oil ratio.
Fan, fan cover, cylinder ns dirty or
damaged.
Carbon deposits on the piston or in the
mufer.
Clogged air lter.
Loose or damaged spark plug.
Air leakage or clogged fuel line.
Fuel is old or contaminated.
Piston seizure.
Faulty carburetor and/or diaphragm.
Overheating condition.
Improper fuel.
Carbon deposits in the combustion
chamber.
Cut at a slower rate.
Consult with an authorized Shindaiwa
dealer.
Rell with clean fresh unleaded gasoline with
a pump octane of 87 or higher, mixed with
a Premium 2-cycle Engine Oil at a 50:1
gasoline/oil ratio.
Clean, repair or replace as necessary.
Consult with an authorized Shindaiwa
dealer.
Clean or replace the air lter.
Tighten or replace.
Repair or replace lter and/or fuel line.
Rell with clean fresh unleaded gasoline with
a pump octane of 87 or higher, mixed with
a Premium 2-cycle Engine Oil at a 50:1
gasoline/oil ratio.
Consult with an authorized Shindaiwa
dealer.
Consult with an authorized Shindaiwa
dealer.
See "Overheating" above.
Check fuel octane rating; check for presence
of alcohol in the fuel. Refuel as necessary.
Consult with an authorized Shindaiwa
dealer.
Low Power Output
Troubleshooting Guide (continued)
What to check Possible Cause Remedy

18
Poor acceleration.
Engine stops abruptly.
Engine difcult to shut off.
Cutting attachment rotates at
engine idle.
Excessive vibration.
Clogged air lter.
Clogged fuel lter.
Carburetor mixture too lean.
Idle speed set too low.
Switch turned off.
Fuel tank empty.
Clogged fuel lter.
Water in the fuel.
Shorted spark plug or loose terminal.
Ignition failure.
Piston seizure.
Ground (stop) wire is disconnected, or
switch is defective.
Overheating due to incorrect spark
plug.
Overheated engine.
Engine idle too high.
Broken clutch spring or worn clutch
spring boss.
Warped or damaged guide bar or cutters.
Damaged gearcase.
Shoulder bolts/cutters worn or out of
adjustment.
Clean the air lter.
Replace the fuel lter.
Return trimmer to the dealer.
Adjust: 3000 (
±
250) rpm (min-1)
Reset the switch and re-start.
Refuel.
Replace lter.
Drain; replace with clean fuel. (See page 9).
Clean and replace spark plug, tighten the
terminal.
Replace the ignition unit.
Consult with an authorized Shindaiwa
dealer.
Test and replace as required.
Clean and regap to 0.024" Correct plug;
NGK BMR6A
Idle engine until cool.
Set idle: 3000 (±250) rpm (min-1)
Replace spring/shoes as required, check
idle speed.
Inspect and replace as required.
Consult with an authorized Shindaiwa
dealer.
Adjust or replace replace as required.
Additional Problems
Troubleshooting Guide (continued)
What to check Possible Cause Remedy

19
Declaration of Conformity
DECLARATION
OF
CONFORMITY
We hereby declare the Shindaiwa Hedge Trimmer,
Model HT230 (HT230/EC1-30, DH230/EC1-24)
meets the following respective requirements.
Council Directives: Standard taken:
89/336/EEC as amended EN 292 parts 1&2
98/37/EC as amended EN 774
2000/14/EC as amended CISPR 12
2002/88/EC as amended
Measured sound power level: 105dB (A)
Guaranteed sound power level: 106dB (A)
Technical documentation is kept by:
K. Maeda DIV. Manager
Engineering Research and Development DIV.
Shindaiwa Kogyo Co., Ltd.
Head office : 6-2-11, Ozuka—Nishi, Asaminami—Ku,
Hiroshima, 731—3167, Japan
TEL: [phone], FAX: [phone]
19th August. 2004
Shindaiwa Kogyo Co., Ltd.
T. Yoshitomi
DIV. Manager Head office : 6-2-11, Ozuka—Nishi, Asaminami—Ku,
Quality Assurance DIV. Hiroshima, 731—3167, Japan
TEL: [phone], FAX: [phone]

NOTES:
Shindaiwa Inc.
11975 S.W. Herman Rd.
Tualatin, Oregon 97062 USA
Telephone: [phone]
Fax: [phone]
www.shindaiwa.com
Shindaiwa Kogyo Co., Ltd.
Head Office:
6-2-11, Ozuka-Nishi
Asaminami-Ku, Hiroshima
731-3167, Japan
Telephone: [phone]
Fax: [phone]
©2004 Shindaiwa, Inc.
Part Number 62821-94310
Revision 8/04
Printed in Japan
Shindaiwa is a registered trademark
of Shindaiwa, Inc.
Specifications subject to change without notice.