115 37 95-79 (006)
OWNER’S MANUAL
BRUSHCUTTERS
BK3410FL/BK3410FL-S
BK4310FL/BK4310FL-S
Caution
• Before using our brushcutter, please
read this manual carefully to understand
the proper use of your unit.
• Keep this manual handy.
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1. Warning labels on the machine
15m (50ft)
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(1) Read owner’s manual before operating this machine.
(2) Wear head, eye and ear protection.
(3) Wear foot protection.
(4) Wear gloves.
(5) Beware of thrown objects.
(6) Warning / Attention
(7) Keep all children, bystanders and helpers 15 meters away from the machine.
IMPORTANT
If warning label peels off or becomes soiled and impossible to read, you should contact
the dealer from which you purchased the product to order new labels and affix them in
the required location(s).
WARNING
Never modify your machine.
We won’t warrant the machine, if you use the remodeled brushcutter or if you
don’t observe the proper usage written in the manual.
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2. Symbols on the machine
For safe operation and maintenance, symbols are
carved in relief on the machine. According to these
indications, please be careful not to take a mistake.
(a) The port to refuel the "MIX GASOLINE"
Position: FUEL TANK CAP
(b) The direction to close the choke
Position: AIR CLEANER COVER
(c) The direction to open the choke
Position: AIR CLEANER COVER
3. Specifications
ZENOAH Knapsack Brushcutter
Name/Type
BK3410FL/BK3410FL-S
BK4310FL/BK4310FL-S
Handle Type
Loop
Machine Weight (✽1)
kg
8.8
9.0
Outward Size (L x W x H) mm
315 x 270 x 410
Outer pipe
Applied Head
mm
1500 (FL)/1400 (FL-S) ø26
2-teeth blade(12”), 4-teeth blade, 8-teeth blade, round saw blade(10”), line head
Automatic centrifugal clutch, spiral gear
1.235 (21 : 17)
Power Transmission Method
Reduction Rate
Blade Rotating Direction
Type
Counterclockwise (from operator' s view)
Single cylinder air cooling 2-cycle gasoline engine
Displacement Volume cc
Fuel Tank Capacity
Fuel Used
33.6
41.5
1.3
Lubricating oil mixed gasoline
2-cycle engine oil
Lubricating Oil Used
Mixing rate
Engine
when using ZENOAH genuine oil (FC grade): 50:1
when using market oil (FB grade): 25:1
float, piston valve
Carburetor
Sparking Method
Spark Plug
C D I
Champion RCJ-6Y
Starting Method
Stopping Method
Recoil starter
Sparking Circuit Primary Short (push button)
(✽1) excluding cutting head, shoulder strap and fuel
Please note that due to improvement, detailed specifications of the product may differ from the information herein.
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4. Safety precautions
2. Never use the product,
1.Read this manual carefully until you
(1) When the ground is slippery or when
you can’t maintain a steady posture.
(2) At night, at times of heavy fog, or at
any other times when your field of
vision might be limited and it would be
difficult to gain a clear view of the
working area.
(3) During rain storms, during lightning
storms, at times of strong or gale-
force winds, or at any other times
when weather conditions might make
it unsafe to use the product.
completely understand and follow all
safety and operating instructions.
2.Keep this manual handy so that you
may refer to it later whenever any
questions arise. Also note, if you
have any questions which cannot be
answered herein, contact the dealer
from whom you purchased the
product.
3.Always be sure to include this manual
when selling, lending, or otherwise
transferring the ownership of this
product.
■ WORKING PLAN
4.Never allow children or anyone unable
to fully understand the directions
given in the manual to use the
machine.
1.You should never use the product
when under the influence of alcohol,
when suffering from exhaustion or
lack of sleep, when suffering from
drowsiness as a result of having
taken cold medicine or at any other
time when a possibility exists that
your judgment might be impaired or
that you might not be able to operate
the product properly and in a safe
manner.
■ WORKING CONDITION
1. When using the product, you should
wear proper clothing and protective
equipment.
(1) Helmet
(2) Ear protectors
2.When planning your work schedule,
allow plenty of time to rest. Limit the
amount of time over which the
product is to be used continuously to
somewhere around 30 ~ 40 minutes
per session, and take 10 ~ 20
minutes of rest between work
sessions. Also try to keep the total
amount of work performed in a single
day under 2 hours or less.
(3) Protection goggles or face
protector
(4) Thick work gloves
(5) Non-slip-sole work boots
2. And you should carry with you.
(1) Attached tools
(2) Properly reserved fuel
(3) Spare blade
(4) Things to notify your working area
(rope, warning signs)
(5) Whistle (for collaboration or
emergency)
WARNING
1.If you don’t observe the working time,
or working manner (See “USING
THE PRODUCT”), Repetitive Stress
Injury (RSI) could occur.
(6) Hatchet or saw (for removal of
obstacles)
3. Do not wear loose clothing, jewelry,
short trousers, sandals, or go barefoot.
Do not wear anything which might be
caught by a moving part of the unit.
Secure hair so it is above shoulder
length.
If you feel discomfort, redness and
swelling of your fingers or any other
part of your body, see a doctor before
getting worse.
2.To avoid noise complaints, in general,
operate product between 8 a.m. and
5 p.m. on weekdays and 9 a.m. to 5
p.m. on weekends.
■ WORKING CIRCUMSTANCE
1. Never start the engine inside a closed
room or building. Exhaust gases
NOTE
contain dangerous carbon monoxide.
Check and follow the local regulations as
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4. Safety precautions
to sound level and hours of operations for
the product.
so as to ensure that neither the cutting
part nor the throttle trigger come into
contact with any obstacle when the
engine starts.
■ BEFORE STARTING THE ENGINE
1. The area within a perimeter of 15 m of
the person using the product should be
considered a hazardous area into
which no one should enter. If
WARNING
Never place the throttle trigger into the
high-speed position when starting the
engine.
necessary, yellow warning rope,
warning signs should be placed around
the perimeter of the area. When work
is to be performed simultaneously by
two or more persons, care should also
be taken to constantly look around or
otherwise check for the presence and
locations of other people working so as
to maintain a distance between each
person sufficient to ensure safety.
2. Check the condition of working area to
avoid any accident by hitting hidden
obstacles such as stumps, stones,
cans, or broken glass.
3. After starting the engine, check to
make sure that the cutting attachment
stops rotating when the throttle is
moved fully back to its original position.
If it continues to rotate even after the
throttle trigger has been moved fully
back, turn off the engine and take the
unit to your authorized ZENOAH
servicing dealer for repair.
■ USING THE PRODUCT
IMPORTANT
IMPORTANT
Cut only materials recommended by the
manufacturer. And use only for tasks
explained in the manual.
Remove any obstacle before beginning
work.
3. Inspect the entire unit for loose
fasteners and fuel leakage. Make sure
that the cutting attachment is properly
installed and securely fastened.
4. Be sure the cutting attachment guard is
firmly attached in place.
5. Always use the harness. Adjust the
harness for comfort before starting the
engine. The harness should be
adjusted so the left hand can
1. Grip the handles firmly with both hands
using your whole hand. Place your feet
slightly apart (slightly further apart than
the width of your shoulders) so that
your weight is distributed evenly across
both legs, and always be sure to
maintain a steady, even posture while
working.
2. Keep cutting attachment below waist
level.
comfortably hold the handlebar grip
approximately waist high.
3. Maintain the speed of the engine at the
level required to perform cutting work,
and never raise the speed of the
engine above the level necessary.
4. If the unit starts to shake or vibrate,
turn off the engine and check the
whole unit. Do not use it until the
trouble has been properly corrected.
5. Keep all parts of your body away from
rotating cutting attachment and hot
surfaces.
■ STARTING THE ENGINE
1. Keep bystanders and animals at least
15 m away from the operating point. If
you are approached, immediately stop
the engine.
2. The product is equipped with a
centrifugal clutch mechanism, so the
cutting attachment begins to rotate as
soon as the engine is started by putting
the throttle trigger into the start
6. Never touch the muffler, spark plug, or
other metallic parts of the engine while
the engine is in operation or
position. When starting the engine,
place the product onto the ground in a
flat clear area and hold it firmly in place
immediately after shutting down the
engine. Doing so could result in
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4. Safety precautions
serious burns or electrical shock.
■ HANDLING FUEL
1. The engine of the ZENOAH product is
designed to run on a mixed fuel, which
contains highly flammable gasoline.
Never store cans of fuel or refill the
tank of the unit in any place where
there is a boiler, stove, wood fire,
electrical sparks, welding sparks, or
any other source of heat or fire which
might ignite the fuel.
■ IF SOMEONE COMES
1. Guard against hazardous situations at
all times. Warn adults to keep pets and
children away from the area. Be careful
if you are approached. Injury may
result from flying debris.
2. If someone calls out or otherwise
interrupts you while working, always be
sure to turn off the engine before
turning around.
2. Never smoke while operating the unit
or refilling its fuel tank.
3. When refilling the tank, always turn off
the engine and allow it to cool down.
Take a careful look around to make
sure that there are no sparks or open
flames anywhere nearby before
refueling.
4. Wipe spilled fuel completely using a
dry rag if any fuel spillage occurs
during refueling.
5. After refueling, screw the fuel cap back
tightly onto the fuel tank and then carry
the unit to a spot 3 m or more away
from where it was refueled before
turning on the engine.
■ MAINTENANCE
1. In order to maintain your product in
proper working order, perform the
maintenance and checking operations
described in the manual at regular
intervals.
2. Always be sure to turn off the engine
and disconnect the spark plug wire
before performing any maintenance or
checking procedures.
WARNING
The metallic parts reach high
temperatures immediately after
stopping the engine.
■ TRANSPORTATION
1. When hand-carrying the product, cover
over the cutting part if necessary, lift up
the product and carry it paying
3. When replacing the cutting attachment
or any other part, or when replacing
the oil or any lubricant, always be sure
to use only ZENOAH products or
products which have been certified
by ZENOAH for use with the
attention to the blade.
2. Never transport the product over rough
roads over long distances by vehicle
without removing all fuel from the fuel
tank. If doing so, fuel might leak from
the tank during transport.
ZENOAH product.
4. In the event that any part must be
replaced or any maintenance or repair
work not described in this manual must
be performed, please contact a
representative from the store nearest
ZENOAH authorized servicing dealer
for assistance.
5. Do not use any accessory or
attachment other than those bearing
the ZENOAH mark and recommended
for the unit.
6. Under no circumstances should you
ever take apart the product or alter it in
any way. Doing so might result in the
product becoming damaged during
operation or the product becoming
unable to operate properly.
WARNING
■ CONTROLLING BLADE THRUST
Blade thrust can cause serious
personal injury. Carefully study this
section. It is important that you
understand what causes blade thrust,
how you can reduce the chance of
blade thrust and how you can remain
in control of the unit if blade thrust
does occur.
1. What causes blade thrust:
Blade thrust can occur when the moving
blade contacts an object that it cannot cut.
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4. Safety precautions
This contact causes the blade to stop for
an instant and then suddenly move or
”bounce” away from the object that was
hit. The operator can lose control of the
unit and the blade can cause serious
personal injury to the operator or any
person nearby if the blade contacts any
part of the body.
2. How you can reduce the chance of
blade thrust:
(1) Recognize that blade thrust can
happen. By understanding and
knowing about bounce, you can help
eliminate the element of surprise.
(2) Cut fibrous weeds and grass only. Do
not let the blade contact materials it
cannot cut such as hard, woody vines
and brush or rocks, fences, metal, etc
(3) Be extra prepared for blade thrust if
you must cut where you cannot see
the blade making contact such as in
areas of dense growth.
(4) Keep the blade sharp. A dull blade
increase the chance of blade thrust.
(5) Avoid feeding the blade too rapidly.
The blade can bounce away from
material being cut if the blade is fed
faster than its cutting capability.
(6) Cut only from your right to your left.
(7) Keep your path of advance clear of
material that has been cut and other
debris.
3. How you can maintain the best
control:
(1) Keep a good, firm grip on the unit with
both hands. A firm grip can help
neutralize bounce. Keep your right
and left hands completely around the
respective handles.
(2) Keep both feet spread apart in a
comfortable stance and yet braced for
the possibility that the unit could
bounce. Do not overreach. Keep firm
footing and balance.
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5. Set up
insert the liner into the clutch housing, being careful
to make sure that the hole on the end of the liner is
facing directly upwards. When the hole reaches a
point directly below the stopper, you will hear a
clicking sound as the stopper moves into the hole to
fix the liner into place. (SE4)
WARNING
•
•
Assemble each part correctly. Wrong assembly
might cause an accident.
If you cannot do the assembling yourself, consult
the shop where you bought this product.
■ ATTACHING THE SHOULDER STRAP (SE1)
1. Pass the ring of the shoulder strap through the
hook(A) and fix it by the bolt securely.
2. Set the hook(B) of each shoulder strap to the D-rings
on the frame.
SE4
(1) Clutch housing
(2) Stopper
(3) Angular hole
(4) Hole
(5) Liner
SE1
(A) UPPER SIDE
(B) LOWER SIDE
(1) Hook (A)
(2) Bolt (M5x12)
(3) Hook (B)
• If you experience any difficulty in inserting the liner,
pull out the liner, rotate the flexible shaft slightly, and
try inserting it again.
(4) D-ring
• Once the liner has been inserted, pull on the liner to
make sure that the stopper is properly engaged.
IMPORTANT
■ ATTACHING THE LINER
1. Remove the bolt located on the joint of the outer
pipe. (SE2)
2. Match the groove of the liner with the threaded hole
and fix with screw securely. (SE2)
After connecting the inner shaft to the shaft of the main
pipe, try to pull out the flexible shaft by hand to make
sure the flexible shaft does not come off.
■ ATTACHING THE THROTTLE CABLE
WARNING
SE2
(1) Bolt
After fitting the wire, check if the wire sleeve is
correctly fitted to the wire stopper. It is dangerous
if the wire sleeve is out of the wire stopper because
the engine speed will not decrease even if the
throttle lever is released.
(2) Joint
(3) Groove
• Align the throttle cable along with the liner and tie it
with band. (SE5)
3. While rotating the flexible shaft located on the
opposite end from the liner, insert the flexible shaft
into the joint until it is tightly connected. (Note that it
is normal at this time for the flexible shaft not to
project from the liner.) (SE3)
SE5
(1) Band
(2) Throttle cable
(3) Tie loosely
SE3
(1) Flexible shaft
(2) Liner
(3) Clutch housing
1. Hook the cable and into the hole of the throttle lever.
And set the cable in the lever as shown in the picture.
(SE6)
4. To connect the clutch housing to the liner, lay the
liner out straight, align the flexible shaft with the
angular hole on the side of the clutch drum, and
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5. Set up
2. Attach the lever as shown in the picture and screw it
securely. (SE6)
(1) Loop handle
(2) Screw
SE8
(3) Washer
(4) Nut
(5) Throttle lever
(6) Right hand grip
SE6
(1) Throttle lever
(2) Hole
(3) Throttle cable
(4) Screw
(5) Nut
WARNING
Stop tightening the screws when the gap A
becomes zero.
■ ATTACHING THE DEBRIS GUARD
WARNING
Never use the machine without the debris guard.
■ ADJUSTING THROTTLE CABLE
• Attach the guard to the clamp on the outer pipe just
touching the gearcase. Fix it with 2 bolts. (SE9)
• Proper play of the throttle cable is 1–2mm. Place the
throttle lever to the lowest speed position (i.e. fully
released status). Pull the throttle cable lightly with
fingers to check its play. Readjust the position of
cable adjuster if the play is too large or too small. To
readjust, slacken a lock nut. Turn the cable adjuster
clockwise to increase the play, or counterclockwise to
decrease the play. Lock the cable adjuster with the
lock nut after readjustment. (SE7)
SE9
(1) Bolt (M5x25)
(2) Clamp
(3) Debris guard
(4) Place to be
attached for blade
use
(5) Place to be
attached for line
head
SE7
(1) Cable adjuster
(2) Lock nut
(3) Throttle cable
■ BLADE
WARNING
• Do not install or remove the blade while the
engine is in operation.
■ ATTACHING THE HANDLE
• Use ZENOAH’s genuine replacement blades and
metal fixtures when installing the blade.
• When installing or removing the blade, fix the
machine securely, and wear robust gloves.
• The blade turns counterclockwise (viewed from
the gear case). When using an inside-out blade,
check the direction of the blade before installing
it. In particular, if you install a chip saw in the
wrong direction, the chips might break and
scatter.
NOTE
The loop handle should be located between the arrow
mark and the throttle lever.
• Attach the loop handle as shown in the
accompanying diagram. Note that it is recommended
that you attach the handle so that the handle is
located some 30–40cm away from the front end of
the right-hand grip. (SE8)
1. Loosen the bolt remove holder A and holder B from
the gear case. (SE10)
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5. Set up
(Note that this is a left-turning screw.)
■ LINE HEAD (SE11) (SE13)
IMPORTANT
SE10
(1) Bar
Since the resistance of the nylon cutter is larger than
that of the metal cutter, wrong operation of the nylon
cutter will cause the clutch to overheat, deform and be
damaged. When using the nylon cutter, carefully note
the following.
(2) Holder B
(3) Holder A
• Use ZENOAH’s genuine nylon cutter. When using a
commercially-available nylon cutter, make sure that it
is no longer than 10 cm in external shape.
• Make sure that the length of the nylon cord is 17 cm
or shorter.
2. Attach the cover (SE11,(11)) and fix it with screw.
3. Insert blade between cutter holder A and cutter
holder B. (SE11)
4. Attach cover and spring washer. (SE11)
5. Screw the bolt to fix them into place. (SE11)
• Keep the engine rotating at high speed while
working.
Tightening torque:
14.7~19.6 N-m
(150~200kgf-m)
1. Detach bolt (1), spring washer (2), washer(3), bolt
cover (4) and cover (11).
2. Put holder B (5) to holder A (9).
Screw arbor bolt (12) in holder B (5).
3. Then attach the cutting head to the gear shaft over
the holders. Hard-tighten it securely.
SE11
(1) Bolt
(2) Spring Washer
(3) Washer
(4) Bolt cover
(5) Holder B
(6) Blade
SE13
(1) Arbor bolt
(2) Holder B
(3) Holder A
(7) Gear shaft
(8) Bar
(9) Holder A
(10) Gear case
(11) Cover preventing
grass from getting
caught up
IMPORTANT
Look at the blade from above, and make sure that the
direction in which the blade is mounted is correct.
(SE12)
SE12
(1) Rotating direction
11
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6. Fuel
WARNING
• Gasoline is very flammable. Avoid smoking or
bringing any flame or sparks near fuel.
• Wipe up all spills before starting the engine.
• Make sure to stop the engine and allow it cool
before refueling the unit.
• Keep open flames away from the area where fuel
is handled or stored.
IMPORTANT
• Never use oil for 4 cycle engine use or water cooled
2-cycle engine.
• Never use "FUEL WITH NO OIL (RAW GASOLINE)".
• Never use fuel laced with water.
• Mixed fuels which have been left unused for a period
of one month or more may clog the carburetor or
result in the engine failing to operate properly. Put
remained fuel into an air-tight container and keep it in
the dark and cool room.
• Please ask for “mixed gasoline for air-cooled 2-cycle
engines” at your nearest gas station, or use fuel
made by putting unleaded gasoline for automobiles
and air-cooled 2-cycle engine oil into a mixing
container in accordance with the following ratios and
then shaking to mix well.
Mixing ratios:
When using Zenoah genuine 2-cycle oil (FC grade):
50:1 (100 ml of oil for
every 5 liters of gasoline)
When using commercially available 2-cycle oil (FB
grade):
25:1(160 ml of oil for
every 4 liters of gasoline)
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7. Operation
■ REFUELING
WARNING
WARNING
• Keep the throttle lever set always to the idling
position when starting or stopping the engine, or
moving the machine. If the throttle lever is set to
any position other than the idling position, the
blade will begin to rotate, causing danger.
• The engine might start after a delay. Hold the unit
until it starts.
• Refuel the fuel tank in a flat place outdoors. Avoid
smoking or bringing any flame or spark near the
fuel, and stub out any cigarette.
• When refueling the fuel tank while using this
machine, make sure to stop the engine and allow
it to cool before refueling the fuel tank.
• Make sure to tighten the fuel-tank cap firmly.
• Wipe up all fuel spills with a dry cloth before
starting the engine.
WARNING
• Before starting the engine, check the entire unit
for troubles such as looseness in installing the
handle, malfunctioning of the throttle lever,
looseness in installing the blade, and fuel leaks.
• When starting the engine, place the machine on
the ground and hold it securely. Since the blade
might touch the ground or object near the
machine, do not start the engine while holding up
the machine with one hand.
IMPORTANT
Fill the fuel tank to roughly 80% of its capacity.
If filled too full, the fuel may leak from the tank cap while
using this machine.
1. Place the brushcutter to be refueled in a flat place
outdoors, and make sure it is stable.
• Do not start the engine with the throttle lever kept
pulled because the blade will immediately begin
to move upon starting the engine. When starting
the engine, place the machine on a flat and firm
place, and keep all objects away from the blade.
• When starting the engine, keep all objects away
from the machine so that the blade does not
touch the ground.
2. Unscrew the fuel-tank cap a little, and allow the
difference of atmospheric pressure between the
inside and outside of the fuel tank to equalize.
3. Remove the fuel-tank cap, and fill fuel little by little up
to roughly 80%.
4. After filling the fuel, close the fuel-tank cap tightly,
and make sure that the fuel does not leak.
• If the blade continues to rotate even after the
throttle lever is returned to the idling position,
stop the engine and check the idling adjustment
screw of the throttle wire and the carburetor.
• When the engine has started, make sure that the
blade does not move. If the blade continues to
move, stop the engine, and check the idling
adjustment screw of the throttle wire and the
carburetor.
OP1
(1) Tank cap
(2) Fuel tank
(1)
(2)
• While using the machine, hold the grips of the
machine with both hands, and keep your eyes on
the blade.
■ STARTING THE ENGINE
• Do not touch the metal part of the engine body
and the muffler while using the machine or
immediately after stopping using it, otherwise you
might suffer burns.
• Do not touch the spark plug or plug cord while
using the machine, otherwise you might suffer an
electric shock.
WARNING
• Before starting the engine after filling with fuel,
move the machine at least 3 m away from where it
was refueled.
Starting the engine where the machine was
refueled might cause a fire.
• Do not start the engine indoors or in any place
which is not well ventilated. Otherwise, you might
suffer carbon monoxide poisoning which could
injure you.
IMPORTANT
If you repeat the starting operation with the choke
closed, the electrode of the spark plug may become wet
and the engine might not start. If this happens, open the
choke, set the throttle lever to the almost fully-open
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7. Operation
position and pull out the starter rope repeatedly, or try
the starting operation again after removing the spark
plug and drying the electrode.
IMPORTANT
Do not pull out the starter rope up to its end, and do not
let the knob jump out of the right hand otherwise it may
not return to its original position.
1. Open the fuel cock. (OP2)
2. Move the choke lever to the closed position. (OP2)
5. After the engine has started, open the choke
gradually.
6. Allow the engine to run for 2 to 3 minutes to warm up.
OP2
(1) Fuel cock
(2) Close
(3) Open
■ STOPPING THE ENGINE
(4) Choke lever
(5) Close
WARNING
(6) Open
• Stop the engine immediately in an emergency.
• The blade rotates by inertia for a while after the
engine has stopped. Do not touch the blade until the
engine has stopped completely.
• Do not touch the muffler or spark plug with bare
hands immediately after the engines has stopped.
Otherwise you may suffer burns because the muffler
and spark plug are extremely hot.
NOTE
When restarting immediately after stopping the engine,
move the choke lever to the open position.
1. Return the throttle lever to the idling position.
2. Push the engine switch button. (OP5)
3. Close the fuel cock.
3. Set the throttle lever to the idling position. (OP3)
OP3
(1) Idling
OP5
(2) Full throttle
(1) Engine switch button
NOTE
When restarting immediately after stopping the engine,
move the throttle lever to the idling position.
IMPORTANT
4. Place the machine on a flat and firm place, and make
sure to keep the blade clear of everything around it.
Then, holding the main pipe with your left hand, put
your right foot on the frame, and pull out the starter
knob with your right hand quickly. (OP4)
If you stop the engine while keeping the revolution
speed high, the engine could become damaged. Return
the throttle lever to its original position and reduce the
engine speed before stopping the engine except in an
emergency.
OP4
■ EQUIPPING THE SHOULDER STRAP (OP6)
1. Hold the main pipe with your right hand. Hang the left
strap on your left shoulder.
2. Change your hand to hold the main pipe with your left
hand. Hang the right strap on your right shoulder.
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7. Operation
OP6
OP8
(1) Area of the blade
where the machine is
prone to blade thrust
WARNING
■ CUTTING OPERATION
• When using this machine, read and obey the
precautions and instructions described in “Safety
precautions” (pages 5 to 8) of this manual.
• Before shouldering the main body of the
brushcutter, return the throttle lever to the idling
position and make sure the blade has stopped
rotating.
• When shouldering the main body of the
brushcutter, be careful that the throttle wire does
not get tangled, and that the blade does not touch
the ground.
WARNING
• Always wear eye protection such as safety
goggles. Never lean over the rotating cutting
head. Rocks or other debris could be thrown into
eyes and face and cause serious personal injury.
• Keep the debris guard attached in place at all
times when the unit is operated.
BLADE USAGE (OP7)
1. Always cut by guiding the head from your right to left.
2. A metal blade cut best up to the point 1/3 from the
edge. Use that area for cutting shrubs, tough and
thick weeds. For cutting young grass, you can use up
to 2/3 from the tip of blade.
3. Adjust the engine speed according to the cutting
objects. Cut the young grass at middle speed, and
cut shrubs or tough and thick weeds at high speed.
WARNING
This product employs a plot type carburetor. If the
engine is tilted too much, the fuel in the breather or
carburetor of the fuel tank might leak out. Do not tilt
the engine upward or downward during cutting, or
when storing or transporting the brushcutter.
WARNING
OP7
Be careful not to hit the blade against any object
during cutting. Hitting the blade against stones, etc.
might damage the blade and driving unit, or bend
the main pipe.
(1) For branches and
trees
(2) For grass and weeds
(3) Direction of cutting
(4) Direction of rotation
LINE HEAD USAGE
• Always remember that the TIP of the line does
cutting. You will achieve better results by not
crowding the line into the cutting area. Allow the unit
to trim at its own pace.
1. Hold the unit so the head is off the ground and is
tilted about 20 degrees toward the sweep direction.
2. Use full throttle when cutting.
3. You can avoid thrown debris by sweeping from your
left to the right.
IMPORTANT
Operating at low speed makes it easier for grass,
weeds, or twigs to become caught up in the blades, and
also it makes the shaft and clutch wear down more
quickly.
OP9
WARNING
When using a metal blade, do not cut grass with the
right half of the blade. Otherwise, the machine might
blade thrust, causing a serious injury.
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7. Operation
4. Use a slow, deliberate action to cut heavy growth.
The rate of cutting motion will depend on the material
being cut. Heavy growth will require slower action
than will light growth.
5. Never swing the unit so hard as you are in danger of
losing your balance or control of the unit.
6. Try to control the cutting motion with the hip rather
than placing the full workload on the arm and hands.
7. Take precautions to avoid wire, grass and dead, dry,
long-stem weeds from wrapping around the head
shaft. Such materials can stall the head and cause
the clutch to slip, resulting in damage to the clutch
system if repeated frequently.
ADJUSTING THE LINE LENGTH
• Your brushcutter is equipped with a semi- auto type
nylon line head that allows the operator to advance
the line without stopping the engine. When the line
becomes short, lightly tap the head on the ground
while running the engine at full throttle.
• Each time the head is bumped, the line advance
about 1 inch (25.4 mm). For better effect, tap the
head on bear ground or hard soil. Avoid bumping in
thick, tall grass as the engine may stall by overload.
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8. Maintenance
■ BLADE
of the spool.
• Sharpen each cutting edge and make sure the
bottom corner is rounded. (MA1)
4. Wind up the line in the correct direction as indicated
on the spool.
• Do not cool the blade with water in case of using
grinder. It may cause cracks on blade.
5. Hook each end of the line in the slot on the edge of
the spool, and then put the ends through the eyelets
on the housing. Make sure that the spring and the
washers are in place.
MA1
6. While holding the spool against the housing, pull the
line ends to release them from the slot.
7. Line up the slot on the bottom cap with the hook on
the housing, press the cap against the housing until it
clicks.
■ REFILLING TRIMMING LINE (MA2)
WARNING
1. For replacement line, use a diameter of .095in
(2.4mm). The spool is capable for a line upto 20ft
(6m) on the 4” head. Avoid using a larger line as it
may cut down the trimming performance.
Make sure that the engine has stopped and is cool
before performing any service to the machine.
Contact with moving cutting head or hot muffler
may result in a personal injury.
MA2
■ AIR CLEANER
Take off the air-cleaner cover and remove the dust
inside the air cleaner every 25 hours of use.
When the air-cleaner element has become extremely
contaminated, clean it thoroughly with warm water
including a neutral detergent. Install it after drying it
completely.
When the air-cleaner element has become deformed or
damaged, replace it with a new one.
Part No.: Z1418-82130
IMPORTANT
If the air-cleaner element becomes clogged, the output
of the engine decreases and fuel consumption worsens.
If you continue to operate the machine without an air-
cleaner element, or with an air-cleaner element which
has been deformed or damaged, the inside of the
engine will wear severely.
MA3
(1) Air-cleaner
element
WARNING
For safety reasons, do not use metalreinforced line.
2. Pinch the slotted area on the both sides of the spool
housing to unhook the bottom cap.
3. Take out the spool and pull off the old line. Fold new
line so that one half line is 4.7in.(12cm) shorter than
another half. And then, hook bended end in the slot
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8. Maintenance
■ FUEL FILTER
MA5
WARNING
When you mount or dismount the fuel filter, be
careful not to damage the rubber packing. A
damaged rubber packing or insufficient mounting of
the fuel filter will cause fuel to leak.
Check how heavily the fuel filter is clogged from the
fueling port of the fuel tank every 25 hours of use.
If the fuel filter is clogged with dust, empty the fuel tank,
take the fuel filter out, and clean it with a brush, etc.
IMPORTANT
If you use the plug wrench to start tightening the spark
If the clogging of the fuel filter cannot be removed or the plug, the thread might become damaged.
fuel filter is damaged, replace it with a new one.
■ AIR COOLING VENT
Part No.: T1154-85100
WARNING
IMPORTANT
Do not put any waste into the intake air-cooling vent
If the fuel filter is clogged, the engine rotation speed
might not |