1. Read this manual carefully until you
completely understand and can follow all
safety notes, precautions, and operating
instructions before using of the unit.
2. Do not operate this tool when you are tired,
ill, or under the influence of alchohol, drugs,
or medication.
3. Always wear eye or face protection and
hearing protection.
4. Do not wear loose clothing, jewelry, short
trousers, sandals, or go barefoot. Do not
wear anything which might be caught by
branches or moving part of the unit. Secure
hair so it is above shoulder length.
5. Never start or run the engine inside a
closed room or building. Exhaust gases
contain dangerous carbon monoxide.
6. Before starting the engine, inspect the
entire unit for loose fasteners and fuel
leakage. Make sure that the cutting
attachment is properly installed and
securely fastened.
7. Be sure the blade guard is attached in
place.
8. Fuel is highly flammable. Always keep open
flames and sparks away from the unit and
fuel depot. Do not smoke while refueling the
unit or mixing fuel.
9. When refueling the unit, make sure to stop
the engine and allow it to cool down. Wipe
spilled fuel completely from the unit. Move
T1238-93110(204)
OWNER’S MANUAL
BRUSHCUTTERS
BC2310LE
BC2610LE
BC3500WE
BC4500WE
1
2
(1)Read the owner's manual.
(2) Wear a helmet, ear protection and eye
protection.
(3)Warning / Attention
(4) Keep all children, bystanders and helpers
15 meters away from the brushcutter.
Explanation of pictorials
at least 3 meters away from fueling site
before starting the engine.
10.Check the condition of working area to
avoid any accident by hitting hidden
obstacles such as stumps, stones, cans, or
broken grass.
11.Keep bystanders and animals at least 15
meters away from the operating point, If you
are approached, immediately stop the
engine.
12.Keep firm footholds and balance at all
times. Do not use the unit where footing is
unsteady or slippery.
13.Keep cutting attachment below waist level.
14.Keep all parts of your body away from the
rotating cutting attachment and hot
surfaces.
15.Warn the operator of the danger of blade
thrust. (Kick back)
Blade thrust may occur when the spinning
blade contacts a solid object in the critical
area. A dangerous reaction may occur
causing the entire unit and operator to be
thrust violently. This reaction is called Kick
back. As a result, the operator can lose
control of the unit which can cause serious
or fatal injury. Kick back is more likely to
occur in areas where it is difficult to see the
material to be cut.
16.When inspecting or servicing the unit, make
sure to stop the engine and disconnect the
spark plug as necessary.
17.Cover the blade when the transporting or
storing the unit. Secure the unit before for
storage or transporting to prevent loss of
fuel, damage or injury.
18.When replacing cutting attachment or other
components, be sure to use the parts
supplied or recommended by KOMATSU
ZENOAH.
19.When the unit is turned off, make sure the
cutting attachment has stopped before the
unit is set down.
20.For units equipped with a clutch, be sure
the cutting attachment stops turning when
the engine idles.
21.Use only for tasks explained in the
instruction handbook.
22.Discard blades that are bent, warped,
cracked, broken or damaged in any way.
23.Instructions on stopping a coasting blade.
A blade can injure while it continues to spin
after the engine is stopped or throttle control
is released.
24.Stop the engine and blade before removing
material that is blocking or entangling the
cutting attachment.
25.Use a sharp blade. A dull blade is more
likely to snag and thrust. Replace the
fastening nut according to the
manufacturer's instruction.
26.Cut only material recommended by the
manufacturer. Do not let the blade contact
material it cannot cut, such as rocks, metal
etc.
27.Always wear safety boots, additionally a
helmet is required if there is a risk of contact
with falling objects.
For safe operation
Thank you for purchasing a KOMATSU ZENOAH product.
Before using our brushcutter, please read this manual carefully
to understand the proper use of your unit.
1-9 Minamidai, Kawagoe, Saitama, 350-1192 Japan
3 4
■ ENGINE
• Using attached 4 socket screws, secure the
connection firmly with equal force.
B: BC3500WE/BC4500WE
1. Remove the upper cap from the bracket.
2. Loosen the 4 bolts on the clamp and insert
the handles equally.
Retighten the bolts.
3. Put the handle assembly into the bracket
and put the upper cap over it. Tighten the
cap securely.
■ CONNECTING THROTTLE WIRE
1. Remove the air cleaner cover.
2. Connect the end of the throttle wire to the
joint on the top of the carburetor.
■ PROTECTOR
• Wrap the protector around the outer pipe as
shown in the figure, and fasten the magic
fastener.
■ BLADE GUARD
A: BC2310LE/BC2610LE
• Attach the guard to the bracket and fix it
with 4 screws and nuts.
B: BC3500WE/BC4500WE
• Attach the guard to the clamp on the outer
pipe just touching the gearcase. Fix it with 2
bolts.
■ INSTALLING CUTTING HEAD
1. While locking the gear shaft by inserting the
attached bar into the upper holder and the
gear box, loosen and remove the hexagon
bolt(left-handed)
2. Fit the spacer attached to the head
assembly between the upper and lower
holders. Then screw in the cutting head to
the gear shaft over the holders. Handtighten it securely.
Setup Fuel
• Keep open flames away from the
area where fuel is handled or stored.
• Mix and store fuel only in an
approved gasoline container.
• Mix a regular grade gasoline (Ieaded or
unleaded, alcohol-free) and a quality-proven
motor oil for air cooled 2-stroke gasoline
engine use.
25 : I Mix Chart
Gasoline liter 1 2 3 4 5
2-cycle oil ml. 40 80 120 160 200
Recommended mixing ratio:
Term Gasoline: Oil
Upto 20 use hours 20 : 1
After 20 use hours 25 : 1
NOTE:
Most engine troubles are caused, directly or
indirectly, by the fuel used on the machine.
Take special care not to mix a motor oil for 4stroke engine use.
BC3500WE
BC4500WE
BC3500WE
BC4500WE
■ HANDLE
A: BC2310LE/BC2610LE
• Put the handle onto the main pipe and fix it
with 4 screws.
5
■ STARTING THE ENGINE
Take care that the cutting head will start
rotating upon the engine starts.
A: BC2310LE/BC2610LE/BC3500WE/BC4500WE
1. Push the primer pump(1) several times until
overflown fuel flows out in the clear tube.
2. Move the choke lever(2) to the closed
position.
3. Set the engine switch(a) to the " I " position.
Set the throttle lever to the start position (12-3).
Use
BC2310LE
BC2610LE
BC3500WE
BC4500WE
■ STOPPING THE ENGINE
1. Release the throttle lever.
2. Move the engine switch to the "O" position.
■ LINE HEAD USAGE
1. 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.
2. Keep the debris guard attached in place
at all times when the unit is operated.
TRIMMING GRASS AND WEEDS
• 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.
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 brushcutters is equipped with a semiauto type nylon line head that allows the
operator to advance the line without
WARNING
■ CUTTING WORK
• By using the shoulder strap, hang the unit
on your right side. Adjust the strap length so
that the cutting head may become parallel
to the ground.
• Choose a suitable recommended cutting
attachment according to the object to be
cut. Never use other cutting attachment not
approved by KOMATSU ZENOAH.
4. Place the unit on a flat, firm place. Keep the
cutting head clear of everything around it.
5. While holding the unit firmly, pull out the
starter rope quickly.
6. After the engine has started, open the
choke guradually and allow the engine to
warm up. Pull the throttle lever to unlock it.
■ ADJUSTMENTS
• Throttle cable: The normal play is 1 or 2 mm
when measured at the carburetor side end.
Readjust with the cable adjuster(1) as required.
• Engine idling speed: It is normal that the
engine keeps running without the blade
rotation, when the throttle lever is released.
When the engine speed is too high or too
slow, readjust the idle set screw (2).
BC2310LE
BC2610LE
BC3500WE
BC4500WE
■ REFILLING TRIMMING LINE
1. For replacement line, use a diameter of
.095in (2.4mm). The spool is capable for a
line upto 27ft (8m) on the 4” head, and 46ft
(14m) on the 6” head. Avoid using a larger
line as it may cut down the trimming
performance. For safety reasons, do not
use metal line.
2. Pinch the slotted area on the both sides of
the spool housing to unhook the bottom
cap. (F1)
3. Take out the spool and pull off the old line.
Put one end of new line through the spool
holes and pull it until the length is equal
between each part of the line. (F2)
4. Wind up the line in the correct as indicated
on the spool. (F3)
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. (F4)
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.
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.
Before cleaning, inspecting, or repairing
the unit, make sure that the engine has
stopped and is cool.
6
Maintenance
■ SPARK PLUG
• Starting failure and mis-firing are often
caused by a fouled spark plug. Periodically
clean the spark plug, and replace with a
new one as required.
Model Type of Plug Spark Gap
BC2310LE Champion RCJ-8Y
BC2610LE Champion RCJ-6Y
BC3500WE
NGK BPMR7A
BC4500WE
■ GEARCASE
• Supply multi-purpose grease at every 25
hours of use.
1. Remove the cutter holders.
2. Charge grease until waste grease appears
around the gear shaft.
■ AIR FILTER
• A clogged air filter will reduce the engine
performance. Check periodically and clean
the filter element in warm, soapy water as
required. Dry completely before installing. If
the element is broken or shrunk, replace
with a new one.
7
MODEL CODE Unit BC2310LE BC2610LE BC3500WE BC4500WE NOTE
Overall size
Length mm 1830 1830 1850 1860
Width mm 230 230 630 630
Height mm 240 240 465 465
Dry Weight Kg 5.0 5.1 7.0 7.3
Engine Model ✽ G23LS G26LS G34L-D G43L-D
Displacement cc 22.5 25.4 33.6 41.5
Carburetor ✽ Diaphragm Diaphragm Diaphragm Diaphragm
Fuel (Mixture ratio) ✽ 25:1 (Gasoline and 2cycle oil)
Fuel Tank capacity litter 0.61 0.75 0.74 0.94
Service range rpm 5000~8000 5000~8000 5000~8000 5000~8000
Spark plug ✽ BPMR7A BPMR7A BPMR7A BPMR7A
Clutch system ✽ Two-shoe Centrifugal-Type
Anti-vibration system
Housing ✽ Yes Yes Yes Yes
Handle-bracket ✽ No No Yes Yes
Gearhead
Neck angle deg 60 60 60 60
Reduction ratio ✽ 1.357 1.357 1.357 1.357
Blade Rotation ✽ Counter-clockwise
Handle Type ✽ Loop Loop Both Both
Throttle lever ✽ Trigger Type (With Safety-lock)
Standard cutter ✽ Nylon Nylon Nylon Nylon
Harness Type ✽ Single Single Double Double
Quick release ✽ Yes Yes Yes Yes
Standard Accessories
Goggle ✽● ● ● ●For transportation
Tool-kit ✽● ● ● ●
Owner's manual ✽● ● ● ●
Specifications are subject to change without notice
Specifications
■ MAINTENANCE BEFORE STORAGE
• Old fuel left in the carburetor may cause
starting failure. When a series of operation
finished, make sure to empty the fuel tank
and drain the carburetor.
• Check all parts and the functions. If the
failured or damaged parts have been found,
replace them with new ones.
0.6 ~ 0.7 mm
■ FUEL FILTER
• When the engine runs short of fuel supply,
check the fuel strainer for blockage.
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