Zenoah Brush Cutter BC2002 User Manual

848J6093A0 (311)  
G
B
O W N ER’S MAN UAL  
BRUSHCUTTERS  
BC2002  
TR2001  
Download from Www.Somanuals.com. All Manuals Search And Download.  
G
B
SAFETY FIRST  
Instructions contained in warnings within this manual marked  
Contents  
with a  
symbol concern critical points which must be taken  
1. Parts location .................................................. 4  
2. Specifications ................................................. 4  
3. Warning labels on the machine ...................... 5  
4. Symbols on the machine ................................ 5  
5. For safe operation........................................... 6  
6. Set up ............................................................. 9  
7. Fuel ............................................................... 10  
8. Operation ...................................................... 11  
9. Maintenance ................................................. 13  
10. Storage ......................................................... 15  
11. Troubleshooting guide .................................. 16  
into consideration to prevent possible serious bodily injury, and  
for this reason you are requested to read all such instructions  
carefully and follow them without fail.  
WARNINGS IN THE MANUAL  
WARNING  
This mark indicates instructions, which must be followed in or-  
der to prevent accidents, which could lead to serious bodily in-  
jury or death.  
IMPORTANT  
This mark indicates instructions, which must be followed, or it  
leads to mechanical failure, breakdown, or damage.  
NOTE  
This mark indicates hints or directions useful in the use of the  
product.  
GB-3  
Download from Www.Somanuals.com. All Manuals Search And Download.  
1. Parts location  
5
[BC2002]  
3
(1) Primer pump  
(2) Air cleaner cover  
(3) Choke lever  
14  
2
1
5
13  
[TR2001]  
4
3
(4) Fuel tank  
(5) Starter knob  
(6) Line head  
(7) Gear case  
11  
14  
2
12  
1
9
13  
4
11  
(8) Debris guard  
(9) Loop handle  
(10) Drive shaft housing  
(11) Sholder strap hanger  
(12) Throttle lever  
(13) Ignition switch  
12  
9
10  
10  
(14) Throttle cable  
7
8
6
7
8
6
2. Specification  
Overall size (L W H) ............................ 1795 x 230 x 303 / 1795 x 340 x 303 mm  
Dry weight .................................................................................................. 4.1 / 4.7 kg  
Engine  
Type ............................................................................ Air-cooled 2-stroke gasoline  
Model ............................................................................................. Zenoah G20LS  
Displacement ........................................................................................... 21.7 cm3  
Fuel............................................................................ Mixture (Gasoline 50 : Oil 1)  
Carburetor .................................................................................... Diaphragm type  
Ignition system ................................................................................................ C.D.I  
Spark plug ........................................................................................ NGK BPMR7A  
Fuel tank capacity................................................................................................. 0.5 L  
Starter ...................................................................................................... Recoil starter  
Clutch .................................................................................................. Centrifugal type  
Reduction ratio .................................................................................................... 1.462  
Cutting head rotating direction ............................. Counter-clockwise (Operator view)  
Specifications are subject to change without notice.  
GB-4  
Download from Www.Somanuals.com. All Manuals Search And Download.  
3. Warning labels on the machine  
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).  
Read owner’s manual before operat-  
ing this machine.  
G
B
Never modify your machine.  
Wear head, eye and ear protection.  
Warning / Attention  
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.  
Keep all children, bystanders and helpers 15  
meters away from the machine.  
4. 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 make a mistake.  
The port to refuel the “MIX GASOLINE”  
Position: FUEL TANK CAP  
The direction to close the choke  
Position: AIR CLEANER COVER  
The direction to open the choke  
Position: AIR CLEANER COVER  
GB-5  
Download from Www.Somanuals.com. All Manuals Search And Download.  
5. For safe operation  
b. At night, at times of heavy fog,  
or at any other times when  
your field of vision might be  
limited and it would be diffi-  
cult to gain a clear view of the  
working area.  
c. 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.  
1. Read this manual carefully until  
you completely understand and  
follow all safety and operating  
instructions.  
2. Keep this manual handy so that  
you may refer to it later when-  
ever any questions arise. Also  
note, if you have any questions  
which cannot be answered  
herein, contact the dealer from  
whom you purchased the prod-  
uct.  
3. Always be sure to include this  
manual when selling, lending, or  
otherwise transferring the own-  
ership of this product.  
4. Never allow children or anyone  
unable to fully understand the  
directions given in the manual  
to use the machine.  
WORKING PLAN  
1. You should never use the prod-  
uct when under the influence of  
alcohol, when suffering from ex-  
haustion or lack of sleep, when  
suffering from drowsiness as a re-  
sult of having taken cold medicine  
or at any other time when a pos-  
sibility 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. When planning your work sched-  
ule, 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 ses-  
sion, 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.  
(2) Ear protectors  
(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”), Re-  
petitive Stress Injury (RSI) could  
occur.  
(6) Hatchet or saw (for removal of  
obstacles)  
3. Do not wear loose clothing, jew-  
elry, short trousers, sandals, or go  
barefoot. Do not wear anything  
which might be caught by a mov-  
ing 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 doc-  
tor before getting worse.  
2. To avoid noise complaints, in gen-  
eral, 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 contain dangerous carbon  
monoxide.  
NOTE  
2. Never use the product,  
a. when the ground is slippery  
or when you can’t maintain a  
steady posture.  
Check and follow the local regula-  
tions as to sound level and hours of  
operations for the product.  
GB-6  
Download from Www.Somanuals.com. All Manuals Search And Download.  
5. For safe operation  
BEFORE STARTING  
part nor the throttle come into  
contact with any obstacle when  
the engine starts.  
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 necessary, yellow  
warning rope, warning signs  
should be placed around the pe-  
rimeter 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.  
WARNING  
G
B
Never place the throttle into the  
high-speed position when starting  
the engine.  
3. After starting the engine, check  
to make sure that the cutting at-  
tachment stops rotating when the  
throttle is moved fully back to its  
original position. If it continues to  
rotate even after the throttle has  
been moved fully back, turn off  
the engine and take the unit to  
your authorized KOMATSU  
ZENOAH servicing dealer for re-  
pair.  
2. Check the condition of working  
area to avoid any accident by hit-  
ting hidden obstacles such as  
stumps, stones, cans, or broken  
glass.  
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 begin-  
ning work.  
3. Inspect the entire unit for loose  
fasteners and fuel leakage. Make  
sure that the cutting attachment  
is properly installed and securely  
fastened.  
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.  
4. Be sure the debris guard is firmly  
attached in place.  
5. Always use the shoulder strap.  
Adjust the strap for comfort be-  
fore starting the engine. The strap  
should be adjusted so the left  
hand can comfortably hold the  
handlebar grip approximately  
waist high.  
2. Keep cutting attachment below  
waist level.  
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.  
STARTING THE ENGINE  
1. Keep bystanders and animals at  
least 15 m away from the operat-  
ing point. If you are approached,  
immediately stop the engine.  
4. If the unit starts to shake or vi-  
brate, turn off the engine and  
check the whole unit. Do not use  
it until the trouble has been prop-  
erly corrected.  
5. Keep all parts of your body away  
from rotating cutting attachment  
and hot surfaces.  
6. Never touch the muffler, spark  
plug, or other metallic parts of the  
engine while the engine is in op-  
eration or immediately after shut-  
ting down the engine. Doing so  
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 into  
the start position. When starting  
the engine, place the product  
onto the ground in a flat clear area  
and hold it firmly in place so as to  
ensure that neither the cutting  
GB-7  
Download from Www.Somanuals.com. All Manuals Search And Download.  
5. For safe operation  
could result in serious burns or elec-  
trical shock.  
HANDLING FUEL  
1. The engine of the KOMATSU  
ZENOAH product is designed to  
run on a mixed fuel, which con-  
tains 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, weld-  
ing sparks, or any other source  
of heat or fire which might ignite  
the fuel.  
IF SOMEONE COMES  
1. Guard against hazardous situa-  
tions at all times. Warn adults to  
keep pets and children away from  
the area. Be careful if you are ap-  
proached. Injury may result from  
flying debris.  
2. If someone calls out or otherwise  
interrupts you while working, al-  
ways be sure to turn off the en-  
gine 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 any-  
where nearby before refueling.  
4. Wipe spilled fuel completely us-  
ing 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 en-  
gine.  
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 en-  
gine before performing any main-  
tenance or checking procedures.  
WARNING  
The metallic parts reach high tem-  
peratures immediately after stop-  
ping the engine.  
TRANSPORTATION  
1. When hand-carrying the product,  
cover over the cutting part if nec-  
essary, lift up the product and  
carry it paying 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 dur-  
ing transport.  
3. When replacing the cutting at-  
tachment or any other part, or  
when replacing the oil or any lu-  
bricant, always be sure to use  
only KOMATSU ZENOAH prod-  
ucts or products which have  
been certified by KOMATSU  
ZENOAH for use with the  
KOMATSU 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 KOMATSU  
ZENOAH authorized servicing  
dealer for assistance.  
5. Do not use any accessory or at-  
tachment other than those bear-  
ing the KOMATSU 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 be-  
coming damaged during opera-  
tion or the product becoming un-  
able to operate properly.  
GB-8  
Download from Www.Somanuals.com. All Manuals Search And Download.  
6. Set up  
INSTALLING HANDLE  
INSTALLING CUTTING HEAD  
G
B
1. While locking the gear shaft, by inserting the supplied  
tool into the upper holder on the gearbox, loosen and  
remove the hexagon nut (left-handed).  
2. Then screw in the cutting head to the gear shaft over  
the holders. Hand-tighten it securely.  
Install the handle to the shaft tube and clamp.  
INSTALLING DEBRIS GUARD  
Attach the guard to the bracket on the main pipe and  
fix it with 2 screws.  
BALANCE UNIT  
1. Put on strap and attach unit to strap.  
2. Slide clamp up or down until unit balances with head  
aparting from the ground when using it.  
GB-9  
Download from Www.Somanuals.com. All Manuals Search And Download.  
7. Fuel  
FUEL  
least one minute. As some oils may be difficult to  
agitate depending on oil ingredients, sufficient agi-  
tation is necessary for the engine to last long. Be  
careful that, if the agitation is insufficient, there is an  
increased danger of early piston seizing due to ab-  
normally lean mixture.  
WARNING  
Gasoline is very flammable. Avoid smoking or  
bringing any flame or sparks near fuel. Make sure  
to stop the engine and allow it cool before refuel-  
ing the unit. Select outdoor bare ground for fuel-  
ing and move at least 3 m (10 ft) away from the  
fueling point before starting the engine.  
5. Put a clear indication on the outside of the container  
to avoid mixing up with gasoline or other contain-  
ers.  
6. Indicate the contents on outside of container for easy  
identification.  
FUELING THE UNIT  
1. Untwist and remove the fuel cap. Rest the cap on a  
dustless place.  
2. Put fuel into the fuel tank to 80% of the full capacity.  
3. Fasten the fuel cap securely and wipe up any fuel  
spillage around the unit.  
• The Komatsu Zenoah engines are lubricated by oil  
specially formulated for air-cooled 2-cycle gasoline  
engine use. If Komatsu Zenoah oil is not available,  
use an anti-oxidant added quality oil expressly labeled  
for air-cooled 2-cycle engine use (JASO FC GRADE  
OIL or ISO EGC GRADE).  
WARNING  
1. Select bare ground for fueling.  
2. Move at least 10 feet (3 meters) away from the fuel-  
ing point before starting the engine.  
3. Stop the engine before refueling the unit. At that time,  
be sure to sufficiently agitate the mixed gasoline in  
the container.  
• Do not use BIA or TCW (2-stroke water-cooling type)  
mixed oil.  
FORYOUR ENGINE LIFE, AVOID:  
1. FUEL WITH NO OIL (RAW GASOLINE) – It will cause  
severe damage to the internal engine parts very  
quickly.  
2. GASOHOL – It can cause deterioration of rubber and/  
or plastic parts and disruption of engine lubrication.  
3. OIL FOR 4-CYCLE ENGINE USE – It can cause  
spark plug fouling, exhaust port blocking, or piston  
ring sticking.  
4. Mixed fuels which have been left unused for a  
period of one month or more may clog the carbu-  
retor and result in the engine failing to operate prop-  
erly.  
5. In the case of storing the product for a long period  
of time, clean the fuel tank after rendering it empty.  
Next, activate the engine and empty the carburetor  
of the composite fuel.  
6. In the case of scrapping the used mixed oil con-  
tainer, scrap it only at an authorized repository site.  
RECOMMENDED MIXING RATIO  
GASOLINE 50 : OIL 1  
Exhaust emission are controlled by the funda-  
mental engine parameters and components (eq.,  
carburation, ignition timing and port timing) with-  
out addition of any major hardware or the intro-  
duction of an inert material during combustion.  
• These engines are certified to operate on unleaded  
gasoline.  
• Make sure to use gasoline with a minimum octane  
number of 89RON (USA/Canada: 87AL).  
• If you use a gasoline of a lower octane value than  
prescribed, there is a danger that the engine tem-  
perature may rise and an engine problem such as  
piston seizing may consequently occur.  
Note: As for details of quality assurance, read the description in  
the section Limited Warranty carefully. Moreover, normal wear and  
change in product with no functional influence are not covered by  
the warranty. Also, be careful that, if the usage in the instruction  
manual is not observed as to the mixed gasoline, etc. described  
therein, it may not be covered by the warranty.  
• Unleaded gasoline is recommended to reduce the  
contamination of the air for the sake of your health  
and the environment.  
• Poor quality gasolines or oils may damage sealing  
rings, fuel lines or fuel tank of the engine.  
HOW TO MIX FUEL  
• Pay attention to agitation.  
1. Measure out the quantities of gasoline and oil to be  
mixed.  
2. Put some of the gasoline into a clean, approved fuel  
container.  
3. Pour in all of the oil and agitate well.  
4. Pour in the rest of gasoline and agitate again for at  
GB-10  
Download from Www.Somanuals.com. All Manuals Search And Download.  
8. Operation  
STARTING ENGINE  
WARNING  
WARNING  
The product is equipped with a centrifugal clutch  
mechanism, so the cutting attachment begins to ro-  
tate as soon as the engine is started by putting the  
throttle into the start position.When starting the en-  
gine, place the product onto the ground in a flat clear  
area and hold it firmly in place so as to ensure that  
neither the cutting part nor the throttle come into con-  
tact with any obstacle when the engine starts.  
The cutting head will start rotating upon the engine  
starts.  
G
B
1. Feed fuel into the fuel tank and tighten the cap se-  
curely.  
2. Rest the unit on a flat, firm place. Keep the cutting  
head off the ground and clear of surrounding objects,  
as it will start rotating upon starting of the engine.  
3. Push the primer pump several times until overflown  
fuel flows out in the clear tube.  
IMPORTANT  
Avoid pulling the rope to its end or returning it by re-  
leasing the knob. Such actions can cause starter fail-  
ures.  
7. Move the choke lever downward to open the choke.  
And restart engine.  
8. Allow the engine to warm up for a several minutes  
before starting operation.  
(1) Choke lever (2) Close (3) Open  
(4) Purimer pump  
NOTE  
4. Move the choke lever to the closed position.  
5. Set the ignition switch to the “I” position. Set the throttle  
lever to the start position (1 2 3).  
1. When restarting the engine immediately after stop-  
ping it, leave the choke open.  
Place the unit on a flat, firm place.  
Keep the cutting head clear of everything around it.  
2. Overchoking can make the engine hard to start due  
to excess fuel. When the engine failed to start after  
several attempts, open the choke and repeat pulling  
the rope, or remove the spark plug and dry it.  
Stop  
Start  
1
3. Ignition switch  
STOPPING ENGINE  
T
R
TA  
S
Stop  
Start  
Ignition switch  
2
T
R
A
T
S
6. While holding the unit firmly, pull out the starter rope  
quickly until engine fires.  
1. Release the throttle lever and run the engine for half  
a minute.  
2. Shift the ignition switch to the STOP position.  
IMPORTANT  
Except for an emergency, avoid stopping the engine  
while pulling the throttle lever.  
GB-11  
Download from Www.Somanuals.com. All Manuals Search And Download.  
8. Operation  
ADJUSTING THROTTLE CABLE  
TRIMMING GRASS AND WEEDS  
The normal play is 1 or 2 mm when measured at the  
carburetor side end. Readjust with the cable adjuster  
as required.  
Always remember that the TIP of the line does cut-  
ting. 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.  
.04 in  
(1)  
(1 ~ 2 mm)  
(1) Cable adjuster  
ADJUSTING IDLING SPEED  
2. You can avoid thrown debris by sweeping from your  
left to the right.  
3. 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.  
(1) Idle adjusting screw  
1. When the engine tends to stop frequently at idling  
mode, turn the adjusting screw clockwise.  
4. Never swing the unit so hard as you are in danger of  
losing your balance or control of the unit.  
2. When the cutting head keeps rotating after releasing  
the trigger, turn the adjusting screw counter-clockwise.  
5. Try to control the cutting motion with the hip rather  
than placing the full workload on the arm and hands.  
NOTE  
6. 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.  
Warm up the engine before adjusting the idling speed.  
CUTTING WORK (LINE HEAD USAGE)  
WARNING  
ADJUSTING THE LINE LENGTH  
Your brush cutter 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.  
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.  
Each time the head is bumped, the line advances  
about 25 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.  
2. Keep the debris guard in place at all times when  
the unit is operated.  
GB-12  
Download from Www.Somanuals.com. All Manuals Search And Download.  
9. Maintenance  
Every Every Every  
25 50 100  
hours hours hours  
after after after  
Before  
use  
System/components  
Procedure  
Note  
fuel leaks, fuel spillage  
fuel tank, air filter, fuel filter  
wipe out  
inspect/clean  
see adjusting  
G
B
replace, if necessary  
replace carburetor  
idle adjusting screw  
spark plug  
idling speed (p. 22)  
clean and readjust  
if necessary  
GAP: .025 in (0.6 ~ 0.7 mm)  
plug gap  
replace, if necessary  
cylinder fins, intake air cooling vent clean  
muffler, spark arrester, cylinder exhaust port clean  
throttle lever, ignition switch  
check operation  
replace if  
cutting parts  
something’s wrong  
grease  
gear case  
screws/nuts/bolts  
debris guard  
tighten/replace  
make sure to attach  
not adjusting screws  
FUEL FILTER  
WARNING  
When the engine runs short of fuel supply, check the  
fuel cap and the fuel filter for blockage.  
Make sure that the engine has stopped and is cool  
before performing any service to the machine. Con-  
tact with moving cutting head or hot muffler may  
result in a personal injury.  
AIR FILTER  
The air filter, if clogged, will reduce the engine perfor-  
mance. Check and clean the filter element in warm,  
soapy water as required. Dry completely before in-  
stalling. If the element is broken or shrunk, replace  
with a new one.  
(1) Fuel filter  
(1) Air filter  
GB-13  
Download from Www.Somanuals.com. All Manuals Search And Download.  
9. Maintenance  
SPARK PLUG  
GEAR CASE  
Starting failure and misfiring are often caused by a  
fouled spark plug. Clean the spark plug and check  
that the plug gap is in the correct range. For a re-  
placement plug, use the correct type specified by  
KOMATSU ZENOAH.  
The reduction gears are lubricated by multipurpose,  
lithium-based grease in the gear case. Supply new  
grease every 25 hours of use or more often depend-  
ing on the job condition.  
Remove the bolt opposit to the grease nipple before  
installing new grease to arrange for old grease to exit.  
0.6~0.7 mm  
REPLACEMENT PLUG IS A NGK BPMR7A.  
INTAKE AIR COOLING VENT  
WARNING  
IMPORTANT  
Note that using any spark plug other than those des-  
ignated may result in the engine failing to operate prop-  
erly or in the engine becoming overheated and dam-  
aged.  
To install the spark plug, first turn the plug until it is  
finger tight, then tighten it a quarter turn more with a  
socket wrench.  
Never touch the cylinder, muffler, or spark plugs  
with your bare hands immediately after stopping  
the engine. The engine can become very hot when  
in operation, and doing so could result in severe  
burns.  
When checking the machine to make sure that it  
is okay before using it, check the area around the  
muffler and remove any wood chips or leaves  
which have attached themselves to the  
brushcutter. Failing to do so could cause the muf-  
fler to become overheated and that in turn could  
cause the engine to catch on fire. Always make  
sure that the muffler is clean and free of wood  
chips, leaves, and other waste before use.  
Check the intake air cooling vent and the area  
around the cylinder cooling fins after every 25  
hours of use for blockage, and remove any waste  
which has attached itself to the brushcutter. Note  
that it is necessary to remove the engine cover  
shown in (MA5) in order to be able to view the up-  
per part of the cylinder.  
15 ~ 220 kgf-cm  
TIGHTENING TORQUE:  
(15.3 ~ 22.4 N.m.)  
MUFFLER  
WARNING  
Inspect periodically, the muffler for loose fasteners,  
IMPORTANT  
If waste gets stuck and causes blockage around the  
intake air cooling vent or between the cylinder fins, it  
may cause the engine to overheat, and that in turn  
may cause mechanical failure on the part of the  
brushcutter.  
any damage or corrosion. If any sign of exhaust leak-  
age is found, stop using the machine and have it re-  
paired immediately.  
Note that failing to do so may result in the engine  
catching on fire.  
(1) Intake air cooling vent  
GB-14  
Download from Www.Somanuals.com. All Manuals Search And Download.  
9. Maintenance  
PROCEDURES TO BE PERFORMED AFTER  
EVERY 100 HOURS OF USE  
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.  
G
B
1. Remove the muffler, insert a screwdriver into the vent,  
and wipe away any carbon buildup. Wipe away any  
carbon buildup on the muffler exhaust vent and cylin-  
der exhaust port at the same time.  
4. Wind up the line in the correct direction as indicated  
on the spool.  
2. Tighten all screws, bolts, and fittings.  
3. Check to see if any oil or grease has worked its way  
in between the clutch lining and drum, and if it has,  
wipe it away using oil-free, lead-free gasoline.  
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.  
REFILLING TRIMMING LINE  
1. For rep lac ement line, use a d iameter of  
2.4 mm. The spool is capable for a line upto  
6 m on the 4" head. Avoid using a larger line as it may  
cut down the trimming performance.  
WARNING  
For safety reasons, do not use metal reinforced line.  
6. While holding the spool against the housing, pull the  
line ends to release them from the slot.  
2. Pinch the slotted area on the both sides of the spool  
housing to unhook the bottom cap.  
7. Line up the slot on the bottom cap with the hook on  
the housing, press the cap against the housing until it  
clicks.  
10. Storage  
Aged fuel is one of major causes of engine starting failure. Before storing the unit, empty the fuel tank and run the  
engine until it uses all the fuel left in the fuel line and the carburetor. Store the unit indoor taking necessary measures  
for rust prevention.  
GB-15  
Download from Www.Somanuals.com. All Manuals Search And Download.  
11. Troubleshooting guide  
Case 1. Starting failure  
CHECK  
fuel tank  
fuel filter  
PROBABLE CAUSES  
incorrect fuel  
fuel filter is clogged  
ACTION  
drain it and use correct fuel  
clean  
carburetor adjustment screw out of normal range  
adjust to normal range  
clean/dry  
correct (GAP: 0.6 ~ 0.7 mm)  
retighten  
sparking (no spark)  
spark plug  
spark plug is fouled/wet  
plug gap is incorrect  
disconnected  
Case 2. Engine starts but does not keep running/hard re-starting  
CHECK  
PROBABLE CAUSES  
ACTION  
fuel tank  
incorrect fuel or staled fuel drain it and use correct fuel  
carburetor adjustment screw out of normal range  
muffler, cylinder (exhaust port) carbon is built-up  
adjust to normal range  
wipe away  
wash  
air cleaner  
clogged with dust  
clogged with dust  
cylinder fin, fan cover  
clean  
When your unit seems to need further service, please consult with our KOMATSU ZENOAH® service shop in your area.  
Limited warranty  
Should any failure occur on the product under normal oper-  
ating conditions within the applicable warranty period, the  
failed part will be replaced or repaired free of charge by a  
KOMATSU ZENOAH® authorized dealer.  
WARRANTY MAINTENANCE OR REPAIRS, AND SHALL  
NOT REDUCE THE WARRANTY OBLIGATION OF THE  
COMPANY.  
THE COMPANY IS LIABLE FOR DAMAGES TO OTHER  
ENGINE COMPONENTS CAUSED BY THE FAIRURE OF A  
WARRANTED PARTS STILL UNDER WARRANTY.  
WARRANTY PERIOD: 1 year (6 months if used profession-  
ally, and 30 days if used for rental purpose) from the date of  
initial purchase.  
THE WARRANTY DOES NOT APPLY TO THOSE UNITS  
WHICH HAVE BEEN DAMAGED BY NEGLIGENCE OF IN-  
STRUCTION LISTED IN THE OWNER/OPERATOR MANUAL  
FOR PROPER USE AND MAINTENANCE OF THE UNITS  
ACCIDENT MISHANDLING, ALTERATION, ABUSE, IM-  
PROPER LUBULICATION, USE OF ANY PARTS OR ACCES-  
SARIES OTHER THAN THOSE SPECIFIED BY THE COM-  
PANY, OR OTHER CAUSES BEYOND THE CONPANY’S  
CONTROL.  
THE PURCHASER SHALL BEAR COSTS OF TRANS-  
PORTING THE UNIT TO AND FROM THE KOMATSU  
ZENOAH DEALER.  
THE PURCHASER SHALL NOT BE CHARGED FOR DIAG-  
NOSTIC LABOR WHICH LEADS TO THE DETERMINATION  
THAT A WARRANTED PART IS DEFECTIVE, IF THE DIAG-  
NOSTIC WORK IS PERFORMED AT THE KOMATSU  
ZENOAH DEALER.  
THIS WARRANTY DOES NOT COVER THOSE PARTS RE-  
PLACED BY NORMAL WEAR OR HARMLESS CHANGES  
IN THEIR APPEARANCE.  
THE PURCHASER OR OWNER IS RESPONSIBLE FOR THE  
PERFORMANCE OF THE REQUIRED MAINTENANCE AS  
DEFINED BY THE MANUFACTURER IN THE OWNER/OP-  
ERATOR MANUAL.  
THERE ARE NO OTHER EXPRESS WARRANTIES.  
ANY WARRANTED PART WHICH IS NOT SCHEDULED FOR  
REPLACEMENT AS REQUIRED MAINTENANCE, OR  
WHICH IS SCHEDULED ONLY FOR REGULAR INSPECTION  
TO THE EFFECT OF REPAIR OR “REPLACE AS NECES-  
SARY” SHALL BE WARRANTED FOR THE WARRANTY PE-  
RIOD. ANY WARRANTED PART WHICH IS SCHEDULED  
FOR REPLACEMENT AS REQUIRED MAINTENANCE  
SHALL BE WARRANTED FOR THE PERIOD OF TIME UP  
TO THE FIRST SCHEDULED REPLACEMNET POINT FOR  
THE PART.  
IMPLIED WARRANTIES INCLUDING THOSE OF MER-  
CHANTABILITY AND FITNESS FOR A PARTICULAR PUR-  
POSE ARE LIMITED TO TWO (2) YEARS OF HOME USE  
[ONE (1) YEAR FOR ANY OTHER USE] FROM THE ORIGI-  
NAL DELIVERY DATE.  
LIABILITIES FOR INCIDENTAL OR CONSEQUENTIAL  
DAMAGE UNDER ANY AND ALL WARRANTIES ARE  
EXCLUDED.  
IF YOU NEED TO OBTAIN MORE INFORMATION, PLEASE  
C A L L YO U R N EA REST SERVI C E C EN TER,  
OR CHECK PLEASE KOMATSU ZENOAH WEB SITE  
ANY REPLACEMENT PART THAT IS EQUIVALENT IN PER-  
FORMANCE AND DULABILITY MAY BE USED IN NON-  
GB-16  
Download from Www.Somanuals.com. All Manuals Search And Download.  

Weil McLain Boiler EG User Manual
Westinghouse Flat Panel Television WD40FX1450 User Manual
Wolf Oven SO36U S User Manual
Xerox Fax Machine Fax Sharing User Manual
Yamaha CD Player CDX 890 User Manual
Yamaha DVD Player DVD S661 User Manual
Yamaha Motorcycle FJR13ADC User Manual
ZALMAN Computer Accessories TNN 500AF User Manual
Zenoah Chainsaw G455AVS User Manual
Zenoah Paint Sprayer NS531 User Manual