OWNER/OPERATOR MANUAL
LINE TRIMMER
BT25-00000 (404)
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.
WARNING
DRIVE UNIT 40400101 and up ENGINE UNIT KU40001 and up
APPLICABLE SERIAL NUMBERS :
BT250
SAFETY FIRST
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.
NOTE
CONTENTS
1. Parts location …………………………………4
2. Specifications …………………………………4
3. Warning labels on the machine ……………5
4. Symbols on the machine ……………………6
5. For safe operation ……………………………7
6. Set up …………………………………………13
7. Fuel……………………………………………14
8. Operation ……………………………………16
9. Maintenance …………………………………19
10. Storage ………………………………………24
11. Troubleshooting guide ………………………24
12. Parts list ………………………………………25
WARNING
IMPORTANT
2. Specifications
■ BT250
Overall size(LxWxH)······················································ 63.0(1600)x13.0(330)x12.0(305) in(mm)
Dry weight w/o acc.····························································································· 11.1 lbs (5.05kg)
Engine Type······················································································ Air-cooled 2-stroke gasoline
Model······································································································ Zenoah GT25N2
Displacement ······················································································· 1.6cu-in (25.4cm3)
Max. output·························································································· 1.2Hp at 8500 rpm
Fuel ······················································································· Mixture(Gasoline 50 : Oil 1)
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.
Specifications are subject to change without notice.
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. Gear case
9. Spark arrester
10. Starter knob
11. Fuel tank
12. Primer pump
13. Choke lever
14. Air cleaner cover
4
(1) Read owner's manual before operating this machine.
(2) Wear head, eye and ear protection.
(3) Warning/Attention
(4) 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.
WARNING
3. Warning labels on the machine
5
IMPORTANT
6
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
4. Symbols on the machine
CE MOTEUR EST CONFORME A LA REGLEMENTATION U.S. EPA 2005 POUR LES PETITS
MOTEURS HORS-ROUTE. DUREE DE CONFORMITE DES EMISSIONS : CATEGORIE A.
SE REFERER AU MODE D’EMPLOI POUR DE PLUS AMPLES INFORMATIONS.
FAMMILLE DE MOAMMILLE DE MOTEUR :TEUR : 5HCPS.025AD;EM 5HCPS.025AD;EM
CYLINDREE :CYLINDREE : 25cm3 DATE DE FTE DE FABRICAABRICATION :TION :
INFORMAINFORMATION IMPORTION IMPORTANTE CONCERNANT LE MOANTE CONCERNANT LE MOTEURTEUR
7
5. For safe operation
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 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.
4. Never allow children or anyone unable to fully
understand the directions given in the manual
to use the machine.
■ WORKING CONDITION
1. When using the product, you should wear proper
clothing and protective equipment.
(1) Helmet
(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 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.
8
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.
■ WORKING PLAN
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.
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.
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.
NOTE
5. For safe operation
WARNING
■ BEFORE STARTING THE ENGINE
1. The area within a perimeter of 50 feet (15m) 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
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 grass.
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 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.
IMPORTANT
5. For safe operation
9
10
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 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 Red
Max servicing dealer for repair.
■ USING THE PRODUCT
Cut only materials recommended by the
manufacturer. And use only for tasks explained
in the manual.
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.
IMPORTANT
5. For safe operation
WARNING
• 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.
■ 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 before
performing any maintenance or checking
procedures.
The metallic parts reach high temperatures
immediately after stopping the engine.
3. When replacing the cutting attachment or any
other part, or when replacing the oil or any
lubricant, always be sure to use only RedMax
products or products which have been
certified by RedMax for use with the RedMax
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 RedMax
authorized servicing dealer for assistance.
5. Do not use any accessory or attachment other
than those bearing the RedMax 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.
■ HANDLING FUEL
1. The engine of the RedMax product is designed
to run on a mixed fuel which contains highly
flammable gasoline. Never store cans of fuel or
WARNING
5. For safe operation
11
12
5. For safe operation
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.
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 10feet (3m) or more away from where it
was refueled before turning on the engine.
■ TRANSPORTATION
1. When hand-carrying the product, cover over the
cutting part if necessary, 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 during transport.
■ INSTALLING HANDLE (SE1)
•Mount the handle to the shaft tube and clamp it
at your best operating position.
■ INSTALLING DEBRIS GUARD (SE2)
• Put the debris guard on the shaft tube near the
gear box, attach it with the screw, washer and
nut provided.
■ INSTALLING CUTTING HEAD (SE3)
1. While locking the gear shaft by inserting the
attached bar into the upper holder and the
housing.
2. Rotate the cutting head to engage threads.
Hand-tighten it securely.
6. Set up
SE1
SE2
SE3
13
14
7. Fuel
■ RECOMMENDED MIXING RATIO
GASOLINE 50:OIL 1
• Exhaust emission are controlled by the
fundamental engine parameters and
components(eq., carburation, ignition
timing and port timing) without
addition of any major hardware or the
introduction 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 89 RON
(USA/Canada: 87AL)
• If you use a gasoline of a lower octane
value than prescribed, there is a danger
that the engine temperature may rise and
an engine problem such as piston seizing
may consequently occur.
• 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
IMPORTANT
• 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
refueling the unit. Select outdoor bare
ground for fueling and move at least
3m (10ft) away from the fueling point
before starting the engine.
• The RedMax engines are lubricated by oil
specially formulated for air-cooled 2-cycle
gasoline engine use. If RedMax 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)
• Do not use BIA or TCW (2-stroke watercooling type) mixed oil.
WARNING
50:1 MIXING CHART
GASOLINE gal. 1 2345
2-CYCLE OIL fl.oz 2.6 5.2 7.8 10.4 13
GASOLINE liter 1 2345
2-CYCLE OIL ml 20 40 60 80 100
7. Fuel
15
again for at least one minute. As some
oils may be difficult to agitate depending
on oil ingredients, sufficient agitation 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 abnormally lean
mixture.
5. Put a clear indication on the outside of the
container to avoid mixing up with gasoline
or other containers.
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.
1. Select bare ground for fueling.
2. Move at least 10feet (3meters) away from
the fueling 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.
FOR YOUR 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 carburetor and result
in the engine failing to operate properly.
5. In the case of storing the product for a
WARNING
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 container, scrap it only at an authorized
repository site.
As lot 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.
NOTE
16
■ STARTING ENGINE
The cutting head will start rotating upon the
engine starts.
1. 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.
2. Push the primer pump several times until
overflown fuel flows out in the return tube. (OP1)
3. Move the choke lever to the closed position.
(OP2)
(1) Choke lever (2) A: the closed position
(3) B: the open position
4. Set the ignition switch to the “start” position.
(OP3)
(1) Ignition switch (2) Stop
(3) Start
5. While holding the unit firmly, pull out the starter
rope quickly until engine fires. (OP4)
• Avoid pulling the rope to its end or returning it by
releasing the knob. Such actions can cause
starter failures.
6. Move the choke lever to the open position
(OP2). And pull out the starter rope quickly to
restart engine. (OP4)
7. Allow the engine to warm up for several minutes
before starting operation.
1. When restarting the engine immediately after
stopping it, leave the choke open (OP2) and
push the primer pump several times (OP4).
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.
NOTE
8. Operation
OP1
(1)
A
B
(2)
(3)
OP2
OP3
OP4
WARNING
IMPORTANT
8. Operation
■ STOPPING ENGINE
1. Release the throttle lever and run the engine for
a half minute.
2. Shift the ignition switch to the STOP position.
• Except for an emergency, avoid stopping the
engine while pulling the throttle lever.
■ ADJUSTING IDLING SPEED (OP5)
1. When the engine tends stop frequently at idling
mode, turn the adjusting screw clockwise.
2. When the cutting head keeps rotating after
releasing the trigger, turn the adjusting screw
counter-clockwise.
(1) Idle adjustment screw
• Warm up the engine before adjusting the idling
speed.
■ 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. (OP6)
2. You can avoid thrown debris by sweeping from
your right to the left.
WARNING
OP5
OP6
17
NOTE
(1)
NOTE
18
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.
4. Never swing the unit so hard as you are in
danger of losing your balance or control of the
unit.
5. Try to control the cutting motion with the hip
rather than placing the full workload on the arm
and hands.
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.
ADJUSTING THE LINE LENGTH
• Your brushcutters 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.
8. Operation
9. Maintenance
Maintenance, replacement, or repair of the emission control device and systems may be
performed by any non-road engine repair establishment or individual.
•Always be sure to stop the engine before inspecting the brushcutter for problems or
performing maintenance.
• Never alter the brushcutter or take the engine apart.
•When replacing parts, always be sure to use only RedMax products or products which
have been certified by RedMax for use with the RedMax brushcutter.
• Things to check before using brushcutter.
■ REFILLING TRIMMING LINE
WARNING
19
1 4 6
2 5 7
7.6m
(25')
3
0.095In
Ø2.4mm
3.8m
(12.5')
20
9. Maintenance
8 11 14
1
2
9
10 12
13
15
THIS
SIDE UP
THIS
SIDE UP
WIND
LINE
•Make sure that the engine has stopped and is
cool before performing any service to the
brushcutter. Contact with moving cutting
head or hot muffler may result in a personal
injury.
■ AIR FILTER
• The air filter, if clogged, will reduce the engine
performance. Monthly check 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. (MA1)
(1) Air filter
■ FUEL FILTER
• When the engine runs short of fuel supply, check
the fuel cap and the fuel filter for blockage.
(MA2)
(1) Fuel filter
■ SPARK PLUG
• Starting failure and mis-firing are often caused
by a fouled spark plug. Periodically clean the
spark plug and check that the spark gap is in the
correct range. For a replacement plug, use the
correct type specified by RedMax(See SPECIFICATIONS on the page 4). (MA3)
•When you take off the spark plug, twist (1) and
pull off the cap (2). (MA4)
• REPLACEMENT PLUG IS A CHAMPION
RCJ6Y OR THE EQUIVALENT, SUCH AS
BOSCH WSR8E OR NGK BPMR7A.
• Note that using any spark plugs other than those
designated may result in the engine failing to
operate properly or in the engine becoming
overheated and damaged.
• 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.
87~104 in-lbs
TIGHTENING TORQUE:
(9.8~11.8 N.m.)
IMPORTANT
9. Maintenance
MA3
MA2
(1)
MA1
MA4
21
WARNING
22
■ MUFFLER
•Inspect periodically, the muffler for loose
fasteners, any damage or corrosion. If any
sign of exhaust leakage is found, do not use
the brushcutter and have it repaired
immediately.
• Note that failing to do so may result in the
engine catching on fire.
■ SPARK ARRESTER
• The muffler is equipped with a spark arrester to
prevent red hot carbon from flying out of the
exhaust outlet. Periodically inspect and clean as
necessary with a wire brush. In the State of
California it is required by law (Section 4442 of
the California Public Resources Code) to equip a
spark arrester when a gas powered tool is used
in any forest covered, brush covered, or grass
covered unimproved land. (MA5)
(1) Spark arrester
■ INTAKE AIR COOLING VENT
•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 brushcutter 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. Note that
failing to do so could cause the muffler to
become overheated, and that this in turn
could cause the brushcutter 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
WARNING
9. Maintenance
(1)
MA5
WARNING
9. Maintenance
hours of use for blockage, and remove any
waste which has attached itself to the
brushcutter. Note that it is necessary to remove
the plug guard shown in Figure 20 in order to be
able to view the upper part of the cylinder.
• 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. (MA6)
(1) Cylinder fin
(2) Intake air cooling vent (back)
■ PROCEDURES TO BE PERFORMED AFTER
EVERY 100 HOURS OF USE
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 at the same time. (MA7)
(1) Screwdriver
(2) Muffler
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.
IMPORTANT
MA7
(1)
(2)
MA6
23
(1)
(2)
24
11. Troubleshooting guide
Case 1. Starting failure
CHECK PROBABLE CAUSES ACTION
fuel tank ➞ incorrect fuel ➞ drain it and with correct fuel
fuel filter ➞ fuel filter is clogged ➞ clean
carburetor adjustment screw ➞ out of normal range ➞ adjust to normal range
sparking (no spark) ➞ spark plug is fouled/wet ➞ clean/dry
➞ plug gap is incorrect ➞ correct (GAP: 0.6~0.7mm)
spark plug ➞ disconnected ➞ retighten
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 with correct fuel
carburetor adjustment screw
➞ out of normal range ➞ adjust to normal range
muffler,cylinder (exhaust port)
➞ carbon is built-up ➞ wipe away
air cleaner ➞ clogged with dust ➞ wash
cylinder fin, fan cover ➞ clogged with dust ➞ clean
When your unit seems to need further service, please consult with our RedMax service shop in your area.
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.
12. Parts list
NOTE :
1. Use KOMATSU ZENOAH genuine parts as specified in the parts list for repair and/or
replacement.
2. KOMATSU ZENOAH does not warrant the machines, which have been damaged by the
use of any parts other than those specified by the company.
3. When placing parts orders for repair and/or replacement, check if the model name and the
serial number are applicable to those specified in the parts list, then use parts number
described in the parts list.
4. The contents described in the parts list may change due to improvement.
5. The parts for the machine shall be supplied seven (7) years after the machine is
discontinued. [It is possible that some specific parts may be subject to change of their
delivery term and list price within the limit of seven (7) years after the machine is
discontinued. It is also possible that some parts may be available even after the limit of
seven (7) years.]
LINE TRIMMER
March. 2004
DRIVE UNIT 40400101 and up ENGINE UNIT KU40001 and up
APPLICABLE SERIAL NUMBERS :
BT250
25
12. Parts list
26
Fig.1 DRIVE UNIT BT250 (S/N 40400101 and up)
Fig.1 DRIVE UNIT BT250 (S/N 40400101 and up)
27
Key# Part Number Description Q'ty
1 BT25-50810 PIPE COMP. 1
2 BT25-50710 DRIVE SHAFT 1
3 BT25-50910 HOUSING ASSY 1
4 BT25-50610 GRIP 1
5 BT25-50510 LEVER ASSY 1
6 BT25-50520 SCREW 1
7 1855-82100 CABLE ASSY 1
8 BT25-80100 TUBE 1
9 BT25-50400 HANDLE ASSY 1
10 BT25-50410 • HANDLE 1
11 0263-90530 • SCREW 3
12 B1181-000504 • NUT 3
13 BT25-80810 GUARD ASSY 1
14 BT25-80840 • GUARD 1
15 01000-69820 • BOLT 1
16 00311-06000 • WASHER 1
17 00217-06000 • NUT 1
18 BT25-80830 • BLADE 1
19 01500-69830 • SCREW 1
20 BT25-90910 PLATE, name 1
21 BT25-90810 SPACER 1
22 BT25-90100 TAP HEAD 1
23 T3002-91190 GOGGLE 1
Key# Part Number Description Q'ty
Fig.2 ENGINE UNIT BT250 (S/N KU40001 and up)
28
12. Parts list
Fig.2 ENGINE UNIT BT250 (S/N KU40001 and up)
29
Key# Part Number Description Q'ty
1 6634401 SCREW 4
2 3075406 FRONT HOUSING 1
3 6635301 SCREW CLUTCH 2
4 6969601 WASHER CURVED 2
5 3075603 CLUTCH ASSY 1
6 6969501 WASHER PLAIN 2
7 6968901 NUT 1
8 6457403 ROTOR 1
9 4309501 CRANKCASE&SHAFT ASSY 1
10 6968501 • BEARING 2
11 5987501 • SEAL 1
12 9071301 GASKET CASE 1
13 6968401 • RING 1
14 5687401 • SEAL 1
15 6634801 • SCREW 3
16 3075003 • CRANKCASE ASSY 1
17 3090101 CRANKSHAFT ASSY 1
18 6457303 PISTON 1
19 6969001 RING 2
20 6969101 CLIP RING 2
21 6968701 WASHER 2
22 6997001 NEEDLE BEARING 1
23 6230101 WRIST PIN 1
24 6968801 KEY 1
25 4300401 PULLEY ASSY 1
26 6634701 BOLT MAFFLER 2
27 3074802 MUFFLER & arrester 1
28 6300206 MUFFLER GASKET 1
29 6457003 CYLINDER 1
30 9071102 GASKET INSULATOR 1
31 6634502 SCREW TORX 1
32 5994702 INSULATOR 1
33 9071103 GASKET CABURETOR 1
34 6634402 SCREW TORX 2
35 3074502 CARBURETOR 1
36 6970001 CLIP HOSE 1
37 6969901 CLIP HOSE 1
38 5688002 PLASTIC RUBBER TUBING 1
39 3078001 PRIMER ASSY 1
40 3097402 CHOKE LEVER&PLATE ASSY 1
41 6634501 • SCREW TORX 1
42 5994601 • CHOKE PLATE 1
43 4315001 • CARBURETOR PLATE 1
44 5945801 • CHOKE LEVER 1
45 6634601 BOLT CARBURETOR 2
46 5687301 ELEMENT 1
Key# Part Number Description Q'ty
47 3099904 COVER ASSY 1
48 5946101 KNOB 1
49 9506501 DECAL 1
50 9506009 DECAL(To Start) 1
51 9506011 DECAL(caution) 1
52 8714402 SPARK PLUG 1
53 6634201 CAP SCREW 2
54 6635102 SCREW TORX 2
55 6300221 PLATE FIN 1
56 9070901 GASKET CYLINDER 2
57 5947001 REAR HOUSING 1
58 6656301 SCREW TORX 3
59 3075304 RECOIL ASSY 1
60 6635101 SCREW TORX 4
61 9506401 DECAL STARTER 1
62 9506010 DECAL(E Start) 1
63 9509001 DECAL(EMISSION) 1
64 3075804 TANK&CAP ASSY 1
65 3075705 • TANK ASSY 1
66 3075904 • • FILTER 1
67 5687901 • • PlPE RETURN 1
68 5688001 • • PlPE FUEL 1
69 5687801 • • TANK GROMMET 1
70 5835901 • • TANK 1
71 6976501 • • CLIP 1
72 3075803 • CAP ASSY 1
73 6635401 BOLT TORX 3
74 6634901 BOLT TORX 2
75 2917803 COIL&BOOT ASSY 1
76 2914301 LEAD ASSY(BLACK) 1
77 2914302 LEAD ASSY(RED) 1
78 5946201 SPACER 2
79 6996901 WASHER 2
80
848-EU0-53D0
CUSHION 1
81 01252-30630 BOLT 1
82 1565-12140 NUT 1
83 2630-31950 SCREW 1
84 1484-86280 WASHER 1
85 5883-32160 SCREW 1
EMISSION-RELATED PARTS, FOR TWO (2) YEARS FROM THE DATE OF ORIGINAL DELIVERY OF THE UNIT,
KOMATSU ZENOAH AMERICA INC. (THE COMPANY),
THROUGH ANY RedMax DEALER, WILL REPAIR OR REPLACE, FREE OF CHARGE, FOR THE ORIGINAL AND EACH
SUBSEQUENT PURCHASER, ANY PART OR PARTS FOUND TO BE DEFECTIVE IN MATERIAL AND/OR
WORKMANSHIP. EMISSION-RELATED PARTS ARE:
THE CARBURETOR ASSY, COIL ASSY, ROTOR, SPARKPLUG,
AIR FILTER, FUEL FILTER, INTAKE MANIFOLD, AND THE GASKETS
ALL OTHER PARTS EXCEPT ABOVE PARTS, FOR TWO (2) YEARS OF HOME USE, NINETY (90) DAYS FOR COMMERCIAL
USE FROM THE DATE OF ORIGINAL PURCHASE, THE COMPANY, THROUGH RedMax DEALER, WILL REPAIR OR
REPLACE, FREE OF CHARGE, FOR THE ORIGINAL PURCHASER, ANY PART OF PARTS FOUND TO BE DEFECTIVE IN
MATERIAL AND/OR WORKMANSHIP. THIS IS THE EXCLUSIVE REMEDY.
THE PURCHASER SHALL BEAR COSTS OF TRANSPORTING THE UNIT TO AND FROM THE RedMax DEALER.
THE PURCHASER SHALL NOT BE CHARGED FOR DIAGNOSTIC LABOR WHICH LEADS TO THE DETERMINATION
THAT A WARRANTED PART IS DEFECTIVE, IF THE DIAGNOSTIC WORK IS PERFORMED AT THE RedMax DEALER.
THE PURCHASER OR OWNER IS RESPONSIBLE FOR THE PERFORMANCE OF THE REQUIRED MAINTENANCE AS
DEFINED BY THE MANUFACTURER IN THE OWNER/OPERATOR MANUAL.
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
NECESSARY" SHALL BE WARRANTED FOR THE WARRANTY PERIOD.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.
ANY REPLACEMENT PART THAT IS EQUIVALENT IN PERFORMANCE AND DULABILITY MAY BE USED IN NONWARRANTY 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 FAILURE OF A
WARRANTED PARTS STILL UNDER WARRANTY.
THE WARRANTY DOES NOT APPLY TO THOSE UNITS WHICH HAVE BEEN DAMAGED BY NEGLIGENCE OF
INSTRUCTION LISTED IN THE OWNER/OPERATOR MANUAL FOR PROPER USE AND MAINTENANCE OF THE UNITS,
ACCIDENTAL MISHANDLING, ALTERATION, ABUSE, IMPROPER LUBULICATION, USE OF ANY PARTS OR ACCESSARIES
OTHER THAN THOSE SPECIFIED BY THE COMPANY, OR OTHER CAUSES BEYOND THE CONPANY'S CONTROL.
THIS WARRANTY DOES NOT COVER THOSE PARTS REPLACED BY NORMAL WEAR OR HARMLESS CHANGES IN
THEIR APPEARANCE.
THERE ARE NO OTHER EXPRESS WARRANTIES.
IMPLIED WARRANTIES INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE LIMITED TO TWO (2) YEARS HOME OF USE, NINETY (90) DAYS FOR COMMERCIAL USE FROM THE ORIGINAL
DELIVERY DATE.
LIABILITIES FOR INCIDENTAL OR CONSEQUENTIAL DAMAGE UNDER ANY AND ALL WARRANTIES
ARE EXCLUDED.
SOME STATES DO NOT ALLOW LIMITATION ON HOW LONG AN IMPLIED WARRANTY LASTS OR EXCLUSION OR
LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMINATION OR EXCLUSION MAY
NOT APPLY TO YOU.
THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY
FROM STATE TO STATE.
IF YOU NEED TO OBTAIN INFORMATION ABOUT THE NEAREST SERVICE CENTER, PLEASE CALL KOMATSU
ZENOAH AMERICA INC. AT (770)-381-5147.
IMPORTANT: YOU WILL RECEIVE A WARRANTY REGISTRATION CARD AT TIME OF PURCHASE.PLEASE FILL
OUT THE CARD AND SEND IT TO RedMax / KOMATSU ZENOA AMERICA WITHIN SEVEN (7) DAYS.BE SURE TO KEEP
A COPY FOR YOUR RECORDS.
RedMax
LIMITED WARRANTY
KOMATSU ZENOAH AMERICA INC.
4344 Shackleford Road Suite 500
Norcross, Georgia 30093
Pièces en rapport avec les émissions de gaz d'échappement : KOMATSU ZENOAH AMERICA INC., par
l'intermédiaire de n'importe quel revendeur RedMax, réparera gratuitement ou remplacera gratuitement pour
l'acheteur initial et chaque acheteur successif toute(s) pièce(s) se révélant de constitution et/ou de montage
défectueux pendant deux (2) ans à compter de la date initiale de livraison d’une unité. Les pièces en rapport avec les
émissions de gaz d'échappement sont:
l'assemblage carburateur, l'assemblage bobine, le rotor, la bougie,
le filtre à air, le filtre à carburant, la tubulure d'admission et les joints
Toutes les pièces autres que celles mentionnées ci-dessus, deux (2) ans d'utilisation domestique, quatre-vingt-
dix (90) jours d'utilisation commerciale, à compter de la date d'achat initial. La société, par l'intermédiaire d'un
distributeur RedMax, réparera ou remplacera toute(s) pièce(s), sans frais et au bénéfice de l'acheteur original, en
prenant en charge les frais de pièces et/ou de main d'œuvre. Telles sont les limites de la garantie.
Le coût du transport de l'unité jusqu'au revendeur RedMax et depuis celui-ci sera à la charge de l'acheteur.
L'acheteur ne supportera pas le coût de main d'oeuvre du diagnostic qui amène à la conclusion qu'une pièce
garantie est défectueuse, si ce diagnostic est effectué chez le revendeur RedMax.
L’acheteur ou propriétaire a pour responsabilité d’effectuer l’entretien obligatoire tel que défini par le fabricant dans le
manuel du propriétaire/de l'utilisateur.
Toute pièce garantie dont le remplacement n'est pas prévu dans le cadre de l’entretien obligatoire, ou pour laquelle
est seulement prévue une inspection périodique pour "remplacement ou réparation si nécessaire" sera garantie pour
la période de garantie. Toute pièce garantie arrivée à l’échéance de son premier remplacement prévu sera garantie
jusqu’à celui-ci.
Toute pièce de rechange équivalente en performance ou en durabilité peut être utilisée pour l’entretien hors-garantie
ou les réparations hors-garantie, et ce sans réduire l’obligation de garantie incombant à la société.
La société sera tenue responsable des dommages aux autres composants du moteur causés par la défaillance de
pièce(s) garantie(s) en période de garantie.
La garantie ne s'applique pas aux unités endommagées par suite de: négligence dans la mise en oeuvre des
instructions spécifiées dans le manuel du propriétaire/de l'utilisateur en vue d’une utilisation et d’un entretien correct,
fausse manœuvre accidentelle, modification, utilisation abusive, lubrification incorrecte, utilisation de pièces ou
d’accessoires autres que ceux spécifiés par la société, ou autres causes hors du contrôle de la société.
Cette garantie ne couvre pas les pièces remplacées en raison de leur usure normale ou de changements
d’apparence sans effets.
Il n'existe aucune autre garantie explicite.
Les garanties implicites, y compris la valeur marchande et la valeur d'usage pour une utilisation particulière, sont
limitées deux (2) ans d'utilisation domestique, quatre-vingt-dix (90) jours d'utilisation commerciale, à compter de la
date originale de livraison.
Les responsabilités pour les dommage conséquents ou incidents sont exclues de toutes les garanties.
Certaines provinces n'autorisant pas les limitations à la durée des garanties implicites, ou les exclusions ou
limitations relatives aux dommages incidents ou conséquents, la limitation indiquée ci-dessus peut ne pas vous être
applicable.
Cette garantie vous donne des droits juridiques spécifiques, et vous pouvez également jouir d’autres droits variant
d'une province à l'autre.
Si vous désirez obtenir des informations sur le centre de service le plus proche, veuillez appeler KOMATSU
ZENOAH AMERICA INC. au (770)-381-5147
Note importante: vous recevrez une carte d'enregistrement de garantie au moment de l'achat. Veuillez la remplir et
l'adresser à RedMax / KOMATSU ZENOAH AMERICA sous sept (7) jours en prenant soin de conserver une copie
pour vous.
RedMax
Garantie limitée
KOMATSU ZENOAH AMERICA INC.
4344 Shackleford Road Suite 500
Norcross, Georgia 30093
Printed in U.S.A.
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