Zenoah BT251 User Manual
848-J25-93A1 (704)
OWNER/OPERATOR MANUAL
LINE TRIMMER
BT251
WARNING
The engine exhaust from this product
contains chemicals known to the State
of California to cause cancer, birth
defects or other reproductive harm.
WARNING
Before using our products, please
read this manual carefully to
understand the proper use of your
unit.
SAFETY FIRST
NOTE
IMPORTANT
WARNING
Instructions contained in warnings within this
manual marked with a symbol concern
critical points which must be taken 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
This mark indicates instructions which must be
followed in order to prevent accidents which could
lead to serious bodily injury or death.
This mark indicates instructions which must be
followed, or it leads to mechanical failure,
breakdown, or damage.
This mark indicates hints or directions useful in the
use of the product.
CONTENTS
1. Parts location …………………………………3
2. Specifications …………………………………3
3. Warning labels on the machine ……………4
4. Symbols on the machine ……………………4
5. For safe operation ……………………………5
6. Set up…………………………………………11
7. Fuel……………………………………………12
8. Operation ……………………………………14
9. Maintenance …………………………………17
10. Storage ………………………………………22
11. Troubleshooting guide………………………22
12. Disposal………………………………………22
13. Limited warranty ……………………………23
1. Parts location
1. Loop handle
2. Ignition switch
3. Throttle cable
4. Throttle lever
5. Drive shaft housing
6. Debris guard
7. Cutting line head
8. Bearing case
9. Spark arrester
10. Starter knob
11. Fuel tank
12. Primer pump
13. Choke lever
14. Air cleaner cover
2. Specifications
■ BT251
Overall size(LxWxH)························································ 67.9(1725)x9.4(240)x19.5(495) in(mm)
Dry weight w/o acc.····························································································· 11.0 lbs (5.01kg)
Engine Type······················································································ Air-cooled 2-stroke gasoline
Model····················································································································· GT25N
Displacement ······················································································· 1.6cu-in (25.4cm3)
Max. output·························································································· 1.2Hp at 8500 rpm
Fuel ······················································································· Mixture(Gasoline 50 : Oil 1)
(when using ZENOAH genuine oil)
Carburetor ··················································································· Walbro Diaphragm type
Spark plug ································································································· NGK BPMR7A
Fuel tank capacity······························································································ 22.3 fl.oz (0.62
Transmission··········································································· Centrifugal clutch, Rigid driveshaft
Reduction ratio ····················································································································· 1.000
Cutting head rotating direction······························································ Clockwise(Operator view)
Durability period····················································································································50hrs.
Standard Accessories
3.5 in. 2-line Head ····································································································· 1 pc.
Tool set·······················································································································1 set
Specifications are subject to change without notice.
)
3
WARNING
IMPORTANT
15
m
(50ft)
(1) (2) (3) (4) (5) (6) (7)
3. Warning labels on the machine
(1)Read owner's manual before operating 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 brushcutter
If warning label peel off or become 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).
Never modify your brushcutter.
We won't warrant the machine, if you use the remodeled brushcutter or you don't observe
the proper usage written in the manual.
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.
(a)The port to refuel the "MIX GASOLINE"
Position: FUEL TANK CAP
(b)The direction A to close the choke
The direction B to open the choke
Position: AIR CLEANER COVER
(c) This unit is fitted with only flexible line cutter.
Never use cutting blade made of metal or
plastic.
Position: DEBRIS GUARD
4
5. For safe operation
1. Read this manual carefully until you
2. Keep this manual handy so that you may refer
3. Always be sure to include this manual when
4. Never allow children or anyone unable to fully
■ WORKING CONDITION
1. When using the product, you should wear proper
(1)Helmet
(2)Ear protectors
(3)Protection goggles or face protector
(4)Thick work gloves
(5)Non-slip-sole work boots
completely understand and follow all safety
and operating instructions.
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.
selling, lending, or otherwise transferring the
ownership of this product.
understand the directions given in the manual
to use the machine.
clothing and protective equipment.
2. And you should carry with you.
(1)Attached tools and files
(2)Properly reserved fuel
(3)Spare blade
(4)Things to notify your working area (rope,
warning signs)
(5)Whistle (for collaboration or emergency)
(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.
■ WORKING CIRCUMSTANCE
1. Never start the engine inside a closed room or
building. Exhaust gases contain dangerous
carbon monoxide.
2. Never use the product,
a. when the ground is slippery or when you can’t
maintain a steady posture.
5
NOTE
WARNING
5. For safe operation
■ WORKING PLAN
1. You should never use the product when under
2. When planning your work schedule, allow plenty
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 difficult 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.
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.
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.
6
1. If you don’t observe the working time, or
working manner (See ■USING THE
PRODUCT), Repetitive Stress Injury(RSI)
could occur.
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 8a.m. and 5p.m. on
weekdays and 9a.m. to 5p.m. weekends.
Check and follow the local regulations as to sound
level and hours of operations for the product.
IMPORTANT
5. For safe operation
■ BEFORE STARTING THE ENGINE
1. The area within a perimeter of 50 feet (15m) of
2. Check the condition of working area to avoid any
Remove any obstacle before beginning work.
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
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.
accident by hitting hidden obstacles such as
stumps, stones, cans, or broken grass.
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 debris guard is firmly attached in
place.
5. If the cutting head is the metal blade, use the
shoulder strap. Adjust the strap for comfort
before starting the engine. The strap should be
adjusted so the left hand can comfortably hold
the handlebar grip approximately waist high.
■ STARTING THE ENGINE
1. Keep bystanders and animals at least 50feet
(15m) 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 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 part nor the
throttle come into contact with any obstacle
when the engine starts.
7
IMPORTANT
WARNING
5. For safe operation
Never place the throttle into the high speed
position when starting the engine.
3. After starting the engine, check to make sure
■ USING THE PRODUCT
Cut only materials recommended by the
manufacturer. And use only for tasks explained
in the manual.
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 has been moved fully back, turn off the
engine and take the unit to your authorized
ZENOAH servicing dealer for repair.
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.
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 start 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.
6. Never touch the muffler, spark plug, or other
metallic parts of the engine while the engine is in
operation or immediately after shutting down the
engine. Doing so could result in serious burns or
electrical shock.
8
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