Makita EM4350RH User manual

Instruction Manual
Petunjuk Penggunaan
Ti liu hưng dn
คูมือการใชงาน
Important:
Read this instruction manual carefully before putting the Petrol Backpack Brushcutter into operation and strictly observe the safety regulations!
Preserve instruction manual carefully!
Penting:
Bacalah petunjuk penggunaan ini dengan teliti sebelum mengoperasikan Pemotong Semak Gendong Bermesin Bensin dan patuhilah dengan
ketat peraturan keselamatan yang berlaku!
Simpanlah buku petunjuk penggunaan ini dengan baik!
Quan trng:
Đc ti liu hưng dn ny mt cch cn thn trưc khi vn hnh My cắt cỏ Chạy xăng Đeo vai v tuân th nghiêm chnh cc quy đnh v
an ton!
Bo qun ti liu hưng dn mt cch cn thn!
ข้อสำคัญ:
อ่านคู่มือการใช้งานนี้อย่างระมัดระวังก่อนใช้งานเครื่องตัดหญ้าสะพายหลังแบบใช้น้ำมันและปฏิบัติตามกฎความปลอดภัยอย่างเคร่งครัด!
เก็บคู่มือการใช้งานไว้ในที่ปลอดภัย!
EM4350RH

2
Thank you very much for purchasing the MAKITA Outdoor Power Equipment.
We are pleased to recommend to you the MAKITA product which is the result of
a long development program and many years of knowledge and experience.
Please read this booklet which refers in detail to the various points that will
demonstrate its outstanding performance. This will assist you to obtain the best
possible result from your MAKITA product.
Table of Contents Page
You will note the following symbols when reading the instructions manual.
SYMBOLS
English (Original instructions)
Symbols .........................................................................2
Safety instructions .........................................................3
Technical data................................................................7
Designation of parts.......................................................8
Mounting of handle ........................................................9
Mounting of exible shaft ...............................................9
Mounting of protector...................................................10
Mounting of metal blade or nylon cutting head ............12
Before start of operation ..............................................13
Correct handling of machine........................................15
How to start and stop engine .......................................16
Resharpening the cutting tool ......................................19
Servicing instructions...................................................21
Storage ........................................................................25
Troubleshooting ...........................................................27
Read instruction manual and follow the
warnings and safety precautions!
Take particular care and attention!
Forbidden!
Keep distance!
Flying object hazard!
Kickback!
No smoking!
No open ame!
Protective gloves must be worn!
Wear sturdy boots with nonslip soles.
Steeltoed safety boots are recommended!
Keep the area of operation clear of all
persons and pets!
Wear protective helmet, eye and ear
protection!
Top permissible tool speed
Fuel (Gasoline)
Engine-manual start
Emergency stop
First Aid
ON/START
OFF/STOP

3
15 Meters
Diagrammatic gure
SAFETY INSTRUCTIONS
General Instructions
Read this instruction manual to become familiar with handling of the –
equipment. Users insufciently informed will risk danger to themselves as
well as others due to improper handling.
It is recommended only to lend the equipment to people who have proven to –
be experienced.
Always hand over the instruction manual.
First users should ask the dealer for basic instructions to familiarize oneself–
with the handling of brushcutters.
Children and young persons aged under 18 years must not be allowed to –
operate this equipment. Persons over the age of 16 years may however
use the device for the purpose of being trained while under supervision of a
qualied trainer.
Use with the utmost care and attention.–
Operate only if you are in good physical condition. Perform all work calmly –
and carefully. The user has to accept liability for others.
Never use this equipment after consumption of alcohol or drugs, or if feeling –
tired or ill.
National regulation can restrict the use of the machine.–
Intended use of the machine
This equipment is only intended for cutting grass, weeds, bushes, –
undergrowth. It should not be used for any other purpose such as edging or
hedge cutting as this may cause injury.
Personal protective equipment
The clothing worn should be functional and appropriate, i.e. it should be tight-–
tting but not cause hindrance. Do not wear either jewelry or clothing which
could become entangled with bushes or shrubs.
In order to avoid either head-, eye-, hand-or foot injuries as well as to protect –
your hearing the following protective equipment and protective clothing must
be used during operation.
Always wear a helmet where there is a risk of falling objects. The protective –
helmet (1) is to be checked at regular intervals for damage and is to be
replaced at the latest after 5 years. Use only approved protective helmets.
The visor (2) of the helmet (or alternatively goggles) protects the face from –
ying debris and stones. During operation always wear goggles, or a visor to
prevent eye injuries.
Wear adequate noise protection equipment to avoid hearing impairment (ear –
muffs (3), ear plugs etc.).
The work overalls (4) protect against ying stones and debris.–
We strongly recommend that the user wears work overalls.
Gloves (5) are part of the prescribed equipment and must always be worn –
during operation.
When using the equipment, always wear sturdy shoes (6) with a non-slip –
sole. This protects against injuries and ensures a good footing.
Starting up the brushcutter
Make sure that there are no children or other people within a working range –
of 15 meters (50 ft), also pay attention to any animals in the working vicinity.
Before use always check the equipment is safe for operation:–
Check the security of the cutting tool, the throttle lever for easy action and
check for proper functioning of the throttle lever lock.
Rotation of the cutting tool during idling speed is not allowed. Check with your –
dealer for adjustment if in doubt. Check for clean and dry handles and test
the function of the start/stop switch.

4
Resting•
Transport•
Refuelling•
Maintenance•
Tool replacement•
Start the brushcutter only in accordance with the instructions.
Do not use any other methods for starting the engine!–
Use the brushcutter and the tools only for such applications as specied.–
Only start the engine, after the entire assembly is done. Operation of the –
device is only permitted after all the appropriate accessories are attached!
Before starting make sure that the cutting tool has no contact with hard –
objects such as branches, stones etc. as the cutting tool will revolve when
starting.
The engine is to be switched off immediately in case of any engine problems.–
Should the cutting tool hit stones or other hard objects, immediately switch off –
the engine and inspect the cutting tool.
Inspect the cutting tool at short regular intervals for damage (detection of –
hairline cracks by means of tapping-noise test).
If the equipment gets heavy impact or fall, check the condition before –
continuing work. Check the fuel system for fuel leakage and the controls
and safety devices for malfunction. If there is any damage or doubt, ask our
authorized service center for the inspection and repair.
Operate the equipment only with the harness attached which is to be suitably –
adjusted before putting the brushcutter into operation. It is essential to adjust
the harness according to the user size to prevent fatigue occurring during
use. Never hold the cutter with one hand during use.
During operation always hold the brushcutter with both hands.–
Always ensure a safe footing.
Operate the equipment in such a manner as to avoid inhalation of the exhaust –
gases. Never run the engine in enclosed rooms (risk of gas poisoning).
Carbon monoxide is an odorless gas.
Switch off the engine when resting and when leaving the equipment –
unattended, and place it in a safe location to prevent danger to others or
damage to the machine.
Never put the hot brushcutter onto dry grass or onto any combustible–
materials.
Always install the approved cutting tool guard onto the equipment before –
starting the engine.
Otherwise contact with the cutting tool may cause serious injury.
All protective installations and guards supplied with the machine must be –
used during operation.
Never operate the engine with faulty exhaust mufer.–
Shut off the engine during transport.–
When transporting the equipment, always attach the cover to the metal blade.–
Ensure safe position of the equipment during car transportation to avoid fuel –
leakage.
When transporting, ensure that the fuel tank is completely empty.–
When unloading the equipment from the truck, never drop the Engine to the –
ground or this may severely damage the fuel tank.
Except in case of emergency, never drop or cast the equipment to the ground –
or this may severely damage the equipment.
Refuelling
Shut off the engine during refuelling, keep away from open ames and do not –
smoke.
Avoid skin contact with mineral oil products. Do not inhale fuel vapor. Always –
wear protective gloves during refuelling. Change and clean protective clothing
at regular intervals.
Take care not to spill either fuel or oil in order to prevent soil contamination–
(environmental protection). Clean the brushcutter immediately after fuel has
been spilt.
Avoid any fuel contact with your clothing. Change your clothing instantly if –
fuel has been spilt on it (to prevent clothing catching re).
Inspect the fuel cap at regular intervals making sure that it can be securely –
fastened and does not leak.
Carefully tighten the fuel tank cap. Change location to start the engine (at –
least 3 meters away from the place of refuelling).
Never refuel in closed rooms. Fuel vapors accumulate at ground level (risk of –
explosions).
Only transport and store fuel in approved containers. Make sure the fuel –
stored is not accessible to children.
Always refuel on stable at surface to avoid fuel spillage. –

5
Caution:
Kickback
Diagrammatic
gure
Diagrammatic
gure
Method of operation
Only use in good light and visibility. During the winter season beware of –
slippery or wet areas, ice and snow (risk of slipping). Always ensure a safe
footing.
Never cut above waist height.–
Never stand on a ladder.–
Never climb up into trees to perform cutting operation.–
Never work on unstable surfaces.–
Remove sand, stones, nails etc. found within the working range.–
Foreign particles may damage the cutting tool and can cause dangerous
kick-backs.
Before commencing cutting, the cutting tool must have reached full working –
speed.
When using metal blades, swing the tool evenly in half-circle from right to left, –
like using a scythe.
If grass or branches get caught between the cutting tool and guard, always
stop the engine before cleaning. Otherwise unintentional blade rotation may
cause serious injury.
Take a rest to prevent loss of control caused by fatigue. We recommend to –
take a 10 to 20-minute rest every hour.
Do not let the cutting tool touch on the ground during operation. Otherwise –
the cutting tool hit an object and may result in personal injury.
Keep the metal blade parallel with the ground during operation.–
Cutting Tools
Use an applicable cutting tool for the job in hand.–
Nylon cutting heads (string trimmer heads) are suitable for trimming lawn
grass.
Metal blades are suitable for cutting weeds, high grasses, bushes, shrubs,
underwood, thicket, and the like.
Never use other blades including metal multi-piece pivoting chains and ail
blades. Otherwise serious injury may result.
When using metal blades, avoid “kickback” and always prepare for an –
accidental kickback. See the section “Kickback.”
Kickback (blade thrust)
Kickback (blade thrust) is a sudden reaction to a caught or bound metal –
blade. Once it occurs, the equipment is thrown sideway or toward the
operator at great force and it may cause serious injury.
Kickback occurs particularly when applying the blade segment between 12 –
and 2 o’clock to solids, bushes and trees with 3 cm or larger diameter.
To avoid kickback:–
Apply the segment between 8 and 11 o’clock;•
Never apply the segment between 12 and 2 o’clock;•
Never apply the segment between 11 and 12 o’clock and between 2 and •
5 o’clock, unless the operator is well trained and experienced and does it at
his/her own risk;
Never use metal blades close to solids, such as fences, walls, tree trunks •
and stones;
Never use metal blades vertically, for such operations as edging and•
trimming hedges.
Vibration
People with poor circulation who are exposed to excessive vibration may –
experience injury to blood vessels or the nervous system. Vibration may
cause the following symptoms to occur in the ngers, hands or wrists: “Falling
asleep” (numbness), tingling, pain, stabbing sensation, alteration of skin color
or of the skin. If any of these symptoms occur, see a physician!
To reduce the risk of “white nger disease”, keep your hands warm during –
operation and well maintain the equipment and accessories.
Maintenance instructions
Have your equipment serviced by our authorized service center, always using –
only genuine replacement parts. Incorrect repair and poor maintenance can
shorten the life of the equipment and increase the risk of accidents.
The condition of the cutter, in particular of the cutting tool of the protective–
devices and also of the harness must be checked before commencing work.
Particular attention is to be paid to the metal blades which must be correctly
sharpened.
Turn off the engine and remove spark plug connector when replacing or –
sharpening cutting tools, and also when cleaning the cutter or cutting tool.

6
Never straighten or weld damaged cutting tools.
Pay attention to the environment. Avoid unnecessary throttle operation for –
less pollution and noise emissions. Adjust the carburetor correctly.
Clean the equipment at regular intervals and check that all screws and nuts –
are well tightened.
Never service or store the equipment in the vicinity of naked ames.–
Always store the equipment in locked rooms and with an emptied fuel tank.–
When cleaning, servicing and storing the equipment, always attach the cover –
to the metal blade.
Observe the relevant accident prevention instructions issued by the relevant trade associations and by the insurance companies.
Do not perform any modications to the equipment as this will endanger your safety.
The performance of maintenance or repair work by the user is limited to those activities as described in the instruction manual. All other work is
to be done by an Authorized Service Agent. Use only genuine spare parts and accessories released and supplied by MAKITA.
Use of non-approved accessories and tools means increased risk of accidents.
MAKITA will not accept any liability for accidents or damage caused by the use of non-approved cutting tools and xing devices of cutting tools,
or accessories.
First Aid
In case of accident make sure that a rst-aid box is available in the vicinity of
the cutting operations. Immediately replace any item taken from the rst aid box.
When asking for help, please give the following
information:
Place of accident–
What happened–
Number of injured persons–
Kind of injuries–
Your name–

7
TECHNICAL DATA
Model EM4350RH
Handle type Loop handle
Dimensions: length x width x height
(without exible/straight shaft part) mm 358 x 280 x 587
Mass (without plastic guard and cutting tool) kg 12.1
Volume (fuel tank) L0.8
Volume (oil tank) L0.1
Engine displacement cm343.0
Maximum engine performance kW 1.5 at 7,500 min-1
Engine speed at recommended max. spindle speed min-1 10,500
Maximum spindle speed (corresponding) min-1 7,200
Idling speed min-1 3,000
Clutch engagement speed min-1 4,000
Carburetor Diaphragm type
Spark plug type NGK CMR6A
Electrode gap mm 0.7 - 0.8
Fuel Automobile gasoline (petrol)
Engine oil API grade SF class or higher, SAE 10W-30 oil
(automobile 4-stroke engine oil)
Cutting tools (cutter blade dia.) mm 440 (with nylon cutting head), 255 (with 4-tooth blade),
255 (with 3-tooth blade), 305 (with 2-tooth blade)
Gear ratio 13/19
Due to our continuing program of research and development, the specications herein are subject to change without notice.•
Specications may differ from country to country.•

8
DESIGNATION OF PARTS
(1)
(2)
(3)
(5)
(7)
(6)
(8)
(9)
(10)
(11)
(4)
(6)
(7)
(12)
(13)
(14)
(15)
(16)
(17)
(18)
(19) (20)
(21)
DESIGNATION OF PARTS
1 Harness
2Clutch case
3Control cable
4 Flexible shaft
5 Rear grip
6 Throttle lever
7I-O switch (on/off)
8 Handle
9 Straight shaft
10 Gear case
11 Protector (Cutting tool guard)
12 Lock-off lever
13 Spark plug
14 Air cleaner
15 Exhaust mufer
16 Exhaust pipe
17 Starter knob
18 Fuel tank cap
19 Fuel tank
20 Oil cap
21 Recoil starter

9
CAUTION: Before doing any work on the equipment, always stop the engine and pull the spark plug connector off the spark plug.
Always wear protective gloves!
CAUTION: Start the engine only after having assembled it completely.
MOUNTING OF HANDLE
MOUNTING OF FLEXIBLE SHAFT
Fix the loop handle on the shaft with two screws.–
To keep a proper distance between the grips, place the handle between the –
arrow marks (1) on the shaft.
Mounting the exible shaft
1. Remove the bolt (1) from the end of the straight shaft (2).
2. Remove the cap from the exible shaft.
NOTE:
Do not lose the cap. Always put the cap when removing the exible shaft.•
3. Turn the exible shaft so that the dented part (3) of the exible shaft faces
downwards.
4. Align the square inner shaft (4) with the joint hole (5). Insert the end of the
exible shaft into the pipe holder all the way.
5. Tighten them with the bolt (1).
NOTICE:
If it is difcult to insert the exible shaft, align the square inner shaft (4) again.•
Do not pull out the inner shaft more than 35 mm (1-1/3”).•
6. Align the hole (7) on the exible shaft with the knob (8) of the clutch case (6),
and insert the other end of the exible shaft into the clutch case.
7. Make sure the knob clicks as the knob ts into the hole of the exible shaft.
To remove the exible shaft from the clutch case, pull up the knob and remove
it.
Connecting the control cable
1. Fit the end of the control cable from the control lever (2) onto the end of the
control cable from the engine (3).
2. Place the control cable from the control lever in the connector (1). And then
close the connector.
3. Make sure the throttle in the carburetor moves simultaneously when pulling
the throttle lever.
(1)
(1)
(4)
(3)
(2)
(5)
(1)
(3) (2)
(6)
(8)
(7)

10
Connecting the lead unit
Connect the lead units from the engine (1) with the lead units from the control
lever (2) as each male and female terminals are connected.
Securing the control cable
Secure the control cable (1) to the exible shaft by using two clamps (2) and
another clamp (3) as illustrated.
CAUTION:
Make sure the control cable is attached to the exible shaft properly. •
Loose cable may catch the branches etc. and result in personal injury.
Do not twine the control cable around the exible shaft. Otherwise the throttle •
may not work properly.
(1) (2)
(1)
(3)
(2)
To meet the applicable safety provisions, only the tool/protector combinations as indicated in the table must be used.
MOUNTING OF PROTECTOR
CAUTION: The appropriate protector must always be
installed, for your own safety and in order to
comply with accident prevention regulations.
Operation of the equipment without the guard
being in place is not permitted.
Do not apply other combination when using
saw-blade.
NOTE: The standard combination of cutting tool differs from
county to country.
Metal blade
Protector for metal blade
Type A Type B
Nylon cutting head
Protector for
nylon cutting head
Protector for
nylon cutting head

11
(3)
(10)
For nylon cutting head
Be sure to mount the nylon cutting head protector (10) onto the type A metal –
blade protector (3) assembled with the nylon cutting head protector.
Mount the nylon cutting head protector (10) by sliding it into place from the –
ank of the metal blade protector (3).
Remove tape adhered to cutter, which cuts nylon cord, on nylon cutting head –
protector (10).
CAUTION: Be sure to push in nylon cutting head protector (10) until it is fully
inserted.
Take care not to injure yourself on the cutter for cutting the nylon
cord.
To remove the nylon cutting head protector (10), apply a hex wrench (11) into –
the notch on the metal blade protector (3), push it in and meanwhile slide the
nylon cutting head protector (10).
(11)
(3) (2)
(1)
(9)
(6)
(8)
(7)
(5)
(4)
For metal blades
CAUTION:
Make sure that the protector tightening bolts are tightened evenly so that the •
gap between the clamp and the protector will be constant.
Otherwise, the protector sometimes may not function as specied.
(For Type A protector)
Fix the protector (3) to the clamp (2) with two bolts M6x30 (1).
(For Type B protector)
Fix the protector to the clamp (4) with two bolts M6x18 (5).
If the protector cover (6) is installed on the shaft, remove it rst as follows.
1. Remove the washers (7), bolt M6x30 (8) from protector cover.
2. Remove the protector cover by slightly spreading the n (9).
NOTE:
When changing the protector from Type B to Type A, install the protector •
cover, bolts M6x30 and washers onto the shaft before installing the protector.

12
Rotation
(5)
Mounting of metal blade with the hex wrench still in place
Mount the metal blade onto the shaft so that the guide of the receiver washer –
(4) ts in the arbor hole in the metal blade. Install the clamp washer (3), cup
(2), and secure the metal blade with the nut (1).
[Tightening torque: 20 - 30 N·m]
NOTE: Always wear gloves when handling the metal blade.
NOTE: The metal blade-fastening nut (with spring washer) is a consumable
part. If there appears any wear or deformation on the spring washer,
replace the nut.
Mounting of nylon cutting head
The clamp washer (3), cup (2), and nut (1) are not necessary for mounting –
the nylon cutting head. The nylon cutting head should go on top of the
receiver washer (4).
Insert the hex wrench (5) through the hole in the gear case and rotate the –
receiver washer (4) until it is locked with the hex wrench.
Then screw the nylon cutting head onto the shaft by turning it counter-–
clockwise.
Remove the hex wrench.–
(4)
(5)
Loosen Tighten
Be sure to use genuine MAKITA metal blades or nylon
cutting head.
The metal blade must be well polished, free of cracks or breakage. If the –
metal blade hits against a stone during operation, stop the engine and check
the blade immediately.
Polish or replace the metal blade every three hours of operation.–
If the nylon cutting head hits against a stone during operation, stop the –
engine and check the nylon cutting head immediately.
CAUTION: The appropriate protector must always be installed, for your
own safety and in order to comply with accident-prevention
regulations.
Operation of the equipment without the guard being in place is
not permitted.
The outside diameter of the cutter blade must be 300 mm
(12”) or less. Never use any blades exceeding 300 mm (12”) in
outside diameter. Cutter blades with outside diameter of 305 mm
or 12 inches can be used only for those with 2-tooth blade.
Turn the straight shaft upside down, and you can replace the metal blade or
nylon cutting head easily.
Insert the hex wrench (5) through the hole in the gear case and rotate the –
receiver washer (4) until it is locked with the hex wrench.
Loosen the nut (1) (left-hand thread) with the socket wrench and remove the –
nut (1), cup (2), and clamp washer (3).
(4)
(3)
(2)
(1)
(5)
MOUNTING OF METAL BLADE OR NYLON CUTTING HEAD

13
Inspection and rell of engine oil
Perform the following procedure, with the engine cooled down.–
Assure that the engine is on a at horizontal surface and conrm if the oil –
level is between the lower (1) or upper (2) limit of the oil indicator.
If the oil level is below the lower limit, remove the oil cap and add oil.–
The area surrounding the external marks is transparent, so the amount of oil –
inside can be checked without having to remove the oil cap. However, if oil
pipe becomes extremely dirty, visibility may be lost, and oil level will have to
be checked against stepped section on inside of oil pipe.
You may need to rell oil approximately every 10 operating hours (every 10 –
refuellings).
If the oil changes in color or mixes with dirt, replace it with new one. (For the
interval and method of replacement, refer to P 21.)
Recommended oil: SAE 10W-30 oil of API Classication, Class SF or higher (4-stroke engine for automobile)
Oil volume: Approx. 0.10L
NOTE: If the engine is not positioned as illustrated on a horizontal surface, an inaccurate indication of oil level may occur and oil may be
overlled. Filling oil above the upper limit may cause oil contamination and/or white smoke.
Replacement of oil: “Oil cap”
Remove dust or dirt near the oil rell port, and detach the oil cap.–
Keep the detached oil cap free of sand or dust. Otherwise, any sand or dust adhering to the oil cap may cause irregular oil circulation or –
wear on the engine parts, which will result in troubles.
BEFORE START OF OPERATION
(1) Keep the engine level, and detach the oil cap.
(2) Fill with oil to upper limit mark.
Use oil bottle when lling.
(1)
(2)
(3) Securely tighten the oil cap. Insufcient tightening may cause oil leakage.

14
(1)
(2)
(3)
Refuelling
WARNING: Shut off the engine before refuelling, keep away
from open ames and do not smoke.
Loosen the tank cap (1) a little to release the tank pressure.–
Remove the tank cap, and refuel. DO NOT ll fuel more than fuel upper limit –
(3).
Wipe the outside of the tank cap to prevent debris from entering into the fuel–
tank.
After refuelling, securely tighten the tank cap. –
NOTE:
If there is any aw or damage on the tank cap, replace it.•
The tank cap wears out in course of time. Replace it every two to three years.•
DO NOT put fuel in the oil ll port.•
Note
Do not replace oil with the engine in a tilted position.•
Filling with oil while engine is tilted leads to overlling which causes oil contamination and/or white smoke.•
After relling oil
Wipe with a rag any spilled oil immediately. –
REFUELLING
Handling of fuel
It is necessary to handle fuel with utmost care. Fuel may contain substances similar to solvents. Refuelling must be performed in a sufciently
ventilated room or in the open air. Never inhale fuel vapor, and keep fuel away from you. If you touch fuel repeatedly or for a long time, the
skin becomes dry, which may cause skin disease or allergy. If fuel enters into the eye, clean the eye with fresh water. If your eye remains still
irritated, consult your doctor.
Storage period of fuel
Fuel should be used within a period of 4 weeks, even if it is kept in a special container in a well-ventilated and shaded area.
Otherwise, fuel may deteriorate in one day.
STORAGE OF MACHINE AND REFILL TANK
Keep the machine and tank at a cool place free from direct sunshine.–
Never keep the fuel in a car.–
Fuel
The engine is a four-stroke engine. Be sure to use an unleaded automobile gasoline 87 or higher octane ((R+M)/2). It may contain no more than
10% alcohol (E-10).
Points for fuel
Never use a gasoline mixture which contains engine oil. Otherwise, it will cause excessive carbon accumulation or mechanical troubles. –
Use of deteriorated oil will cause irregular start-up. –

15
CORRECT HANDLING OF MACHINE
A
B
(2)
(1)
(3) (4)
(5)
(6)
WARNING: Failure to maintain complete control of the machine at all could result in serious bodily injury or DEATH.
1. Put the harness on your back, and close the buckle (1).
To fasten the waist strap, pull the end of the strap (A).
To loosen it, pull up the end of the fastener (2) (B).
2. Adjust the shoulder strap (3) to a length that is comfortable to work.
To fasten the strap, pull the end of the strap.
To loosen it, pull up the end of the fastener (4).
3. Adjust the stabilizer strap of the shoulder and hip (5, 6). To fasten the strap,
pull the end of the strap. To loosen it, pull up the end of the fastener.
4. Roll redundant straps and fasten them with the loop and hook fastener.
Attachment of harness
Adjust the harness for shouldering the engine comfortably during operation.
(1)

16
Observe the applicable accident prevention regulations!
STARTING
Move at least 3 m away from the place of refuelling. Place the unit on the ground taking care that the cutting tool does not come into contact
with the ground or any other objects.
A: Cold start
1) Set this machine on a at space.
2) Set the I-O switch (1) to OPERATION (2).
HOW TO START AND STOP ENGINE
(1)
(2)
(3)
3) Choke lever
Close the choke lever.
Choke opening:
Full closing in cold or when the engine is cold. –
Full or half opening if the engine is a bit warm, such as restarting engine –
just after stopping during warm-up operation.
4) Primer pump
Continue to push the primer pump (3) until fuel comes into the primer pump.
(In general, 7 to 10 pushes.)
If the primer pump is pushed excessively, an excess of gasoline returns to
the fuel tank.
CLOSE
(1)
Releasing the machine
To release the machine, squeeze the sides of the buckle (1) and take off the harness.–
Be extremely careful to maintain control of the machine at this time. Do not allow the machine to be deected toward you or anyone in the
work vicinity.

17
NOTE:
Do not pull the throttle lever unnecessarily when the engine is not running. It may cause ooding of fuel in the engine, and may cause the •
engine difcult to start up.
In case of ooding of the fuel, remove the spark plug and pull the starter handle slowly to remove excess fuel. Also, dry the electrode section •
of the spark plug.
If the engine res and stops, or stops soon after starting, return the choke lever to the OPEN position, and pull the starter knob a few times •
again to start the engine.
If the choke lever is left in the CLOSE position, and the starter knob merely pulled repeatedly, too much fuel will be sucked in, and the engine •
will become difcult to start.
Do not race the engine in warm-up operation unnecessarily.•
B: Warm start
1) Keep the choke lever full open.
2) Push the primer pump repeatedly.
3) Keep the throttle lever at the idling position.
4) Pull the starter knob strongly.
You can also restart the engine while carrying the tool on your back.
CAUTION:
Make sure that the cutting tool is not touching while restarting. –
Do not pull the throttle lever when restarting. Otherwise the cutting tool starts –
rotating.
Hold the handle with your right hand, and pull the starter knob strongly.
OPEN
5) Recoil starter
Make sure you have a rm footing.
Hold the unit with your left hand and press it down rmly.
CAUTION: Do not stand or kneel on the throttle cable. The internal
wire may be pulled and the cutting tool may start rotating
unintentionally.
Do not open the throttle.
Pull the starter knob gently until a certain resistance is felt. Then, return the
starter knob, and pull it strongly.
Never pull the rope to the full extension. Once the starter knob is pulled,
never release your hand immediately. Hold the starter knob until it returns to
its original point.
6) Choke lever
Once engine starts, set choke lever to the OPEN position.
Open the choke lever gradually while checking the engine operation. Be –
sure to open the choke lever to the full in the end.
In cold or when the engine is cooled down, never open the choke lever –
suddenly. Otherwise the engine may stop.
7) Warm-up operation
Continue warm-up operation for 2 to 3 minutes.
NOTICE: Do not pull the throttle lever unnecessarily while the engine
is not running. It may cause fuel leak from the air cleaner. If it
happens, wipe leaked fuel off. Also, open the air cleaner cover
and clean the element and the air cleaner plate.
STOPPING
1) Release the throttle lever (2) fully, and when the engine rpm has lowered,
set the I-O switch (1) to STOP the engine will now stop.
2) The cutting tool continues to rotate a while after stopping the engine. Wait
until it stops completely.
(1)
(2)
STOP

18
ADJUSTMENT OF IDLE SPEED
When it is necessary to adjust the idle speed, perform it by the carburetor adjusting screw.
CHECKUP OF IDLE SPEED
Set the idle speed to 3,000 min– -1.
If it is necessary to change the idle speed, use a phillips head screw driver on
the screw illustrated on the right.
To increase the idle speed, turn the adjusting screw clockwise. –
To reduce the idle speed, turn the adjusting screw counterclockwise.
The carburetor is factory adjusted. However, after several use the idle speed –
need to be re-adjusted.
(1)
(2)
PREVENTION FROM CARBURETOR ICING
CAUTION: When environmental temperature is higher than 10°C, always
return the shutter to normal (sun mark) setting. Otherwise the
engine may be damaged by overheating.
When the environmental temperature is low and humidity is high, water vapor
may freeze inside the carburetor and the engine drives unsteadily (carburetor
icing). Change the setting of the shutter as follows if necessary.
1. Remove the screw (1).
2. Change the direction of the shutter (2) as follows:
− Environment temperature is higher than 10°C: Set the shutter in normal
position (sun mark).
− Environment temperature is equal or lower than 10°C: Set the shutter in
anti-icing position (snow mark).
3. Tighten the screw.

19
(1)
(3)
(2)
(4)
(3)
Replacing the nylon cord (BUMP & FEED)
WARNING:
Make sure that the cover of the nylon cutting head is secured to the housing
properly as described below. Failure to properly secure the cover may cause
the nylon cutting head to y apart resulting in serious personal injury.
1. Press the latches (1) on the housing (2) inwards and lift upward to remove
the cover (3).
2. Release the nylon cord from the eyelet. And remove the spool (4) from the
cover. Discard any of the remaining nylon cord.
CAUTION: The cutting tools shown in the illustration are not to be
sharpened. Manual resharpening will result in imbalances of the
cutting tool causing vibrations and damage to the equipment.
NOTE: To increase the service life of the cutter blade it may be turned over
once, until both cutting edges have become blunt.
RESHARPENING THE CUTTING TOOL
NYLON CUTTING HEAD
The nylon cutting head is a dual line trimmer head that has bump & feed
mechanism.
The nylon cutting head feeds out the nylon cord after tapping the trimmer head
on the ground.
Operation
Increase the nylon cutting head speed to approx. 6,000 min– -1.
Bump the nylon cutting head lightly on the ground.
The most effective cutting area is shown by the shaded area.–
If the nylon cord does not feed out, rewind/replace the nylon cord by following –
the procedures described under “Replacing the nylon cord.”
Most effective cutting area
(5)
3. Hook the middle of the new nylon cord to the notch (5) located at the center
of the spool between the 2 channels.
One side of the cord should be about 80 mm (3”) longer than the other side.
Wind both ends rmly around the spool in the direction of arrow mark on the
spool.
80 mm (3”)

20
(7)
5. Mount the spool in the cover as holding notches meet the eyelets (7).
Unhook the ends of the cord from their temporary position and feed the
cords through the eyelets.
(8)
(7)
(1)
(1)
6. Align the square slits (8) on the housing with the eyelets (7). Then push the
housing rmly onto the cover to secure it. Make sure the latches (1) fully
spread in the cover.
(6)
4. Wind all but about 100 mm (4”) of the cords, leaving the ends temporarily
hooked through notches (6).