RedMax BCZ2450S, BCZ2450T User Manual

848-J9T-93A0 (901)

U
S

F
R

E
S

OWNER'S/OPERATOR'S
MANUAL

MODE D’EMPLOI MANUAL DE

INSTRUCCIONES

BRUSHCUTTERS

DEBROUSSAILLEUSE

DESBROZADOR

APPLICABLE SERIAL NUMBERS :

DRIVE UNIT 90200101 and up
ENGINE UNIT 90200101 and up

NUMEROS DE SERIE APPLICABLES :

BOITE DE COMMANDES 90200101 et au-delà
MOTEUR 90200101 et au-delà

NÚMEROS DE SERIE APLICABLES:

UNIDAD DE ACCIONAMIENTO

90200101

y superior

UNIDAD DE MOTOR

90200101

y superior

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

AVERTISSEMENT

AVERTISSEMENT

ADVERTENCIA

ADVERTENCIA

Before using our products,
please read this manual carefully
to understand the proper use of
your unit.

WARNING

For BCZ2450T:
This trimmer is designed for use
as a trimmer only.
Metal blades should never be
used on this trimmer.

Los gases de escape del motor de
este producto contienen
sustancias químicas conocidas
por el Estado de California como
causantes de cáncer,
malformaciones en recién nacidos
y otros problemas de
reproducción.

Les échappements du moteur de
ce produit contiennent des
produits chimiques connus par
l’Etat de Californie comme étant
responsables de cancers,
d’anomalies congénitales et
d’autres atteintes à l’appareil
reproducteur.

Antes de usar nuestros productos,
lea detenidamente este manual a
fin de familiarizarse con el uso
correcto de este aparato.

ADVERTENCIA

Para BCZ2450T:
Este desbrozador se concibe para
un uso exclusivo como
desbrozador.
Las cuchillas metálicas no deben
nunca utilizarse sobre este
desbrozador.

Avant d’utiliser cette

ce produit

,
veuillez lire attentivement ce
manuel afin de bien comprendre le
bon fonctionnement de cet
appareil.

AVERTISSEMENT

Pour BCZ2450T:
Cette débroussailleuse est conçue
pour un usage exclusif comme
débroussailleuse.
Les lames métalliques ne doivent
être jamais utilisées sur cette
débroussailleuse.

BCZ2450T

BCZ2450S

Use as a trimmer only
Utilisée comme débroussailleuse seulement
Utilizado como desbrozador solamente

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BCZ2450S/T

U
S

848-J9T-93A0 (901)

OWNER'S/OPERATOR'S
MANUAL

BRUSHCUTTERS

APPLICABLE SERIAL NUMBERS :

DRIVE UNIT 90200101 and up
ENGINE UNIT 90200101 and up

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.

WARNING

For BCZ2450T:
This trimmer is designed for use
as a trimmer only.
Metal blades should never be
used on this trimmer.

BCZ2450T

Use as a trimmer only

BCZ2450S

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BCZ2450S/T

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

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 .................................................................................9

7. Fuel...................................................................................10

8. Operation..........................................................................12

9. Maintenance.....................................................................14

10. Storage.............................................................................16

11. Disposal............................................................................16

12. Optional blade usage........................................................17

13. Troubleshooting guide......................................................20

Contents

1. Read this brushcutter Owner/Operator
Manual carefully. Be sure you
understand how to operate this unit
properly before you use it. Failure to do
so could result in serious injury.

2. Be sure to keep this manual handy so
that you may refer to it later whenever
any questions arise. Also note that you
are requested to contact the dealer from
whom you purchased the product for
assistance the event that you have any
questions which cannot be answered
herein.

3. Always be sure to include this manual
when selling, lending, or otherwise
transferring the ownership of this
product.

4. Do not lend or rent your machine
without the owner's manual.

5. Be sure that anyone using your unit
understands the infomation contained in
this manual.

6. Never let a child under 13 years old use
the machine.

WARNING

WARNING

IMPORTANT

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BCZ2450S/T

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1. Parts location

■ BCZ2450S/BCZ2450T

Overall size(LxWxH) ····················································································· 71.3(1810)x9.0(228)x11.5(292) in(mm)
Dry weight ··········································································· 11.1 lbs (5.02kg) (11.9 lbs (5.40kg) Including tap head)
Engine Type·················································································································· Air-cooled 2-stroke gasoline

Model················································································································································· GZ23N
Displacement ··················································································································· 1.5cu-in (23.6cm

3

)

Max. output ························································································· 1.15Hp (0.858kW)at 8000/min

-1

(rpm)

Idle speed······················································································································3000±200/min

-1

(rpm)

Fuel ··················································································································· Mixture(Gasoline 50 : Oil 1)

(when using RedMax/ZENOAH genuine oil)
Carburetor ··············································································································· Walbro Diaphragm type
Spark plug ································································································································NGK CMR7H

Fuel tank capacity····························································································································21.3 fl.oz (0.63 )
Transmission········································································································ Centrifugal clutch, Rigid driveshaft
Reduction ratio

BCZ2450S············································································································································ 1.462
BCZ2450T················································································································································ 2.1

Cutting head rotating direction·············································································· Counter-clockwise(Operator view)
Durability period···············································································································································300hrs.
Standard Accessories

4 in. 2-line Head ···································································································································· 1 pc.
Goggle··················································································································································· 1 pc.
Tool Kit ·················································································································································· 1 pc.

Specifications are subject to change without notice.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

1. Loop handle

2. Suspention point

3. Stop switch

4. Throttle cable

5. Throttle trigger

6. Shaft tube

7. Cutting attachment guard

8. Cutting line head

9. Gear case

10. Spark arrester

11. Starter knob

12. Fuel tank

13. Primer

14. Choke lever

15. Air cleaner cover

2. Specifications

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BCZ2450S/T

3. Warning labels on the machine

For safe operation and maintenance, symbols
are carved in relief on the machine. According
to these indications, please be careful not to
take a mistake.

(a) The port to refuel the "MIX GASOLINE"
Position: FUEL TANK CAP

(b) The direction to close the choke
Position: AIR CLEANER COVER

(c) The direction to open the choke

Position: AIR CLEANER COVER

(1) Read owner/operator manual before operating this machine.
(2) Wear head, eye and ear protection.
(3) Warning! Danger of kickback.
(4) Beware of thrown objects.
(5) Warning/Attention
(6) 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.
Do not attach any metal blade to BCZ2450T.
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

4. Symbols on the machine

15

m

(50ft)

(1)(

2

)(

3

)(

4

)(

5

)(

6

)

*1: The year will be changed every year of manufacturing.
*2: The initial number will be changed every year of

manufacturing.

*3: SP : Sealed tank made of HDPE or PE.

USE JASO FD OR ISO L-EGD GRADE 50:1 OIL

MANUFACTURED:

THIS ENGINE MEETS U.S. EPA AND CALI­ FORNIA EXH / EVP REGS FOR

2009*1

S.O.R.E.

ENGINE FAMILY :

9HQZS.0244XY*2 DISPL.:

24cc

EMISSION CONTROL SYSTEM :

EXH;EM/EVP;SP*

3

COMPLIANCE PERIOD : 300 HOURS

REFER TO OPERATOR'S MANUAL FOR MAINTE­NANCE, SPECIFICATIONS AND ADJUSTMENTS.

EMISSION CONTROL INFORMATION

ZENOAH AMERICA INC.

■ EMISSION CONTROL

An emission control label is located on the engine.

IMPORTANT

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BCZ2450S/T

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•A brushcutter or trimmer can be
dangerous if used incorrectly or
carelessly, and can cause serious or
fatal injury to the operater or others. It
is extremely important that you read
and understand the contents of this
Owner's manual.

• Under no circumstances may the
design of the machine be modified
without the permission of the
manufacturer. Always use genuine
accessories and parts. Non-authorized
modifications and/or accessories or
parts can result in serious personal
injury or the death of the operator or
others.

• 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. Also try to keep the total
amount of work performed in a single
day under 2 hours or less.

• If you don’t observe the working time,
or working manner (See p5), 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.

■ Basic safety rules

1. Never operate the product when you are
fatigued, ill, or upset, or under the
influence of madication that may make you
drowsy, or if you are under the influence
of alcohol or drugs.

2. Never use the product;
a: When the ground is slippery or when

you can't maintain a steady posture.

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.

3. Wear the following protective equipments
when operating the product.

a: Approved helmet to reduce the risk of

falling objects.

WARNING

5. For safe operation

b: Approved ear protection to reduce the

risk of hearing loss.

c: Approved (ANSI Z87.1.) eye protection

and foot protection to reduce the risk of
injury associated with thrown objects.

d: Face filter mask in dusty conditions to

reduce the risk of injury associated with
the inhalation of dust.

e: Wear sturdy rubber-soled shoes or

shoes with some other form of anti-slip
protection to help protect you against
falling.

f: Wear thick anti-vibration gloves to

reduce the risk of whitefinger disease.

g: Do not wear loose clothing, scarves,

neck chains, unconfineed long hair, and
like to reduce the risk of injury
associated with objects being drawn into
air intake and rotating parts.

Personal protective equipment cannot
eliminate the risk of injury but it will reduce
the degree of injury.

4. The ignition system of your unit produces
an electromagnetic field of a very low
intensity. This field may interfere with some
pacemakers. To reduce the risk of serious
or fatal injury, persons with pacemaker
should consult their physician and the
pacemaker munufacturer before operating
this tool.

5. The area within a perimeter of 50 feet (15
meters) 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.

6. Avoid using the product where stable
footing and balance are not assured.

7. All product service, other than the items
listed in the Owner's Manual, should be
performed by competent service
personnel.

8. Always shut off the engine before setting it
down.

9. Start the engine only in well ventilated
areas. Never start or run the engine inside
a closed room or building and potentially
explosive atmosphere. Exhaust fumes

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BCZ2450S/T

contain dangerous carbon monoxide.

10. Never to touch the spark plug or plug cord
while the engine is in operation Doing so
may result in being subjected to an
electrical shock.

11.Never to touch the muffler, spark plug,
other metallic parts of the engine or
engine cover while the engine is in
operation or immediately after shutting
down the engine. These metallic parts
and engine cover reach high
temperatures during operation and doing
so could result in serious burns.

12.To reduce the risk of injury associated
with contacting rotating parts, stop the
engine before installing or removing
attachments. Always disconnect the spark
plug before performing maintenance or
accessing movable parts.

■ Before use

1. Each time before starting the engine,

inspect the entire unit to see if every part
is in good order and is securely tightened
in place. If any damage is found in the fuel
line, the exhaust line, or the ignition wiring,
do not use the product until it has been
repaired.

2. Before starting operation, always make

sure that the cutting attachment and the
debris guard are properly installed and
securely fastened.

3. If the cutting head is the metal blade,

change the guard and handle as shown in
the Owner's manual (see P17).

4. 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.

■ Starting the engine

1. Keep bystanders and animals at least 50

feet (15 meters) away from the operating
point. If you are approached, immediately
stop the engine.

2. The product is equipped with centrifugal

clutch mechanism, so the cutting
attachment could rotate as soon as the
engine is started. When starting the
engine, place the product onto the ground
in a flat clear area and hold it firmly in

IMPORTANT

5. For safe operation

place so as to ensure that neither the
cutting part nor the throttle come into
contact with any obstacle when the engine
starts.

Make sure the throttle is at idle position.
Never place the throttle into the high
speed position or half throttle position
(throttle lock 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 (idle 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
RedMax 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 you detect abnormal vibration or noise
during operation, promptly stop the product
and check whether something has broken.
If a breakedown has occurred, do not
operate the product until the problem is
fixed.

5. Keep all parts of your body away from
rotating cutting attachment.

6. 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.

7. If someone calls out or otherwise interrupts
you while working, always be sure to turn
off the engine before turning around.

8. After using the product and other

IMPORTANT

WARNING

WARNING

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BCZ2450S/T

U
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5. For safe operation

equipment, CLEAN UP!

■ Transport

1. Drain the fuel from the fuel tank before
transporting or storing the product.

2. When hand-carrying the product, cover
over the cutting part, lift up the product and
carry it paying attention to the blade.

3. Secure the unit carefully to prevent
movement when it is transported.

4. A unit that receives a strong shock during
transport and unloading may malfunction.

■ Fuel safety

1. Always use caution when handling fuel. It
is highly flammable. Wipe up all spills,
screw the fuel cap back tightly, and then
move the product at least 10 feet (3
meters) from the fueling point before
starting the engine.

2. Eliminate all sources of sparks or flame
(i.e. smoking, open flames, or work that
can cause sparks) in the areas where fuel
is mixed, poured, or stored.

3. Do not smoke while handling fuel or while
operating the product.

4. Do not refuel a hot engine.

5. Do not refuel a running engine.

6. Keep the handles dry, clean and free of oil
or fuel mixture.

7. Always store fuel in an approved container
designed for that purpose.

■ Storage

1. Always store the product and fuel so that
there is no risk of leakages or fumes
coming into contact with sparks or naked
flames from electrical equipment, electric
moters, relays/switches, boilers and the
like.

2. When storing the product, the fuel tank
should be emptied.

3. When storing the product, choose a space
indoors free from moisture and out of the
reach of children.

■ Avoid noise problem

Check and follow the local regulations as to
sound level and hours of operations for the
product.

1. Operate power equipment only at
reasonable hours not early in the morning
or late at night when people might be
disturbed. Comply with times listed in local
ordinances.

IMPORTANT

2. To reduce sound levels, limit the number of
pieces of equipment used at any one time.

3. Operate the product at the lowest possible
throttle speed to do the job.

4. Check your equipment before operation,
especially the muffler, air intakes and air
filters.

■ For protecting your body from vibration

Prolonged use of the product, exposing
the operater to vibrations and cold may
produce whitefinger disease (Raynaud's
phenomenon), which symptoms are
tingling and burning sensations followed
by loss of color and numbness in the
fingers.
All factors which contribute to whitefinger
disease are not known, but cold weather,
smoking diseases or physical conditions
as well as long periods of exposure to
vibration are mentioned as factors. In
order to reduce the risk of whitefinger
disease, the following precautions are
strongly recommended.

a: Keep your body warm. Never use the

product during rains.

b: Wear thick anti-vibration gloves.
c: Take more than 5 minutes of break in

warm place frequently.

d: Maintain a firm grip at all times, but do not

squeeze the handles with constant,
excessive pressures.

e: If you feel discomfort, redness and swelling

of your fingers or any other part of your
body, see a doctor before getting worse.

■ Maintenance

1. In order to maintain your product in proper
working order, perform the maintenance
and checking operations described in the
manual at regular intervals.

2. Always be sure to turn off the engine and
disconnect the spark plug before
performing any maintenance or checking
procedures.

The metallic parts and engine cover reach
high temperatures immediately after
stopping the engine.

3. Examine the product at intervals for loose
fasteners and rusted or damaged parts.
Use special care around the fuel line, the

WARNING

WARNING

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BCZ2450S/T

5. For safe operation

muffler, and the ignition wiring.

4. When replacing the any other part, 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.

5. 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.

6. Do not use any accessory or
attachment other than those bearing
the RedMax mark and recommended
for the unit.

7. 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.

■ Disposal

When disposing your machine, fuel or oil
for the machine, be sure to allow your
local regulations.

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BCZ2450S/T

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6. Set up

■ MOUNTING ENGINE (SE1)

1. Push the driveshaft housing toward the
clutch housing and rotate it by hand to
check that the driveshaft is engaged
with the gears.

2. Insert the driveshaft housing into the
clutch housing until it bottoms, and
align the positioning holes on the clutch
housing and the shaft tube and install
the screw. When difficult to engage,
twist the engine slightly.

3. Fasten the clamp securely with two
screws.

Tighten the screws gradually by turns.

■ 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.
(SE2)

■ CONNECTING SWITCH WIRES

• Connect the switch wires between the
engine and the main unit. Pair the wires
of the same color.

■ INSTALLING HANDLE

• Mount the handle to the shaft tube and
clamp it at a location that is comfortable
to you. (SE3)

(1) About 19 inches (48cm)

■ INSTALLING DEBRIS GUARD

• Put the debris guard on the gear box,
attach it with the screws and hardware
provided. (SE4)

IMPORTANT

SE1

SE2

(1)

SE3

SE4

SE5

■ INSTALLING LINE HEAD (SE5)

1. While locking the gear shaft, by
inserting the supplied tool into the
upper holder on the gear box, loosen
and remove the hexagon nut(left­handed)

2. Fit the line head assembly to the gear
shaft over the holders. Hand-tighten it
securely.

• You need not holder (B) and nut when
installing the cutting head.

• Do not attach any metal blade to

BCZ2450T.

IMPORTANT

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BCZ2450S/T

lines or fuel tank of the engine.

• Failures caused by operating engines on gasoline with octane
rating lower than 89 are not covered

by the RedMax Two-

Stroke engine warranty.

•Alternative Fuels (Not Gasoline)
Alternative fuels, such as E-15 (15% ethanol), E-20 (20%
ethanol), E-85 (85% ethanol) are NOT classified as gasoline
and are NOT approved for use in RedMax 2-stroke gasoline
engines. Use of alternative fuels will cause major engine
performance and durability problems such as: improper
clutch engagements, overheating, vapor lock, power loss,
lubrication deficiency, deterioration of fuel lines, gaskets
and internal carburetor components, etc... Alternative fuels
cause high moisture absorption into the fuel/oil mixture
leading to oil and fuel separation.

■ OIL REQUIREMENTS

• Use only RedMax "Max Life", Synthetic blend Premium Air­Cooled two-stroke engine oil or oil certified to ISO-L-EGD
(ISO/CD1378) standard AND

one that is JASO-FD

registered.

RedMax Air-Cooled "Max Life", Synthetic blend Premium two
stroke engine oil and ISO-L-EGD

(ISO/CD1378) AND

JASO-FD

oils are fully compatible

with gasoline's containing 10% Ethanol.

RedMax Air-Cooled "Max Life", Synthetic blend Premium two
stroke engine oil and ISO-L-EGD

(ISO/CD1378) AND

JASO-FD

oils are Universal and should be mixed at 50:1 ratio for all 2
stroke air cooled engines sold in the past regardless of mixing
ratios specified in those manuals.

• If the oil is registered with JASO, the JASO Logo with FD

and

registration number

will be displayed on the container. The

highest JASO rating is "FD", which equals the ISO-L-EGD
rating. Lower ratings are "FC", "FB", and "FA".

• Engine problems due to inadequate lubrication caused by
failure to use ISO-L-EGD

certified and JASO FD registered oil

such as "MaxLife", RedMax Synthetic blend Premium 2-stroke
oil WILL VOID THE REDMAX TWO-STROKE ENGINE

WARRANTY.

• Do not use NMMA (National Marine Manufacturers
Association), BIA (Boating Industry Association), and TCW (two
cycle water cooled) oils designed for MoPeds or Outboard,
water cooled Marine Engines. Do not use API (American
Petroleum Institute), TC (Two Cycle) labeled oils. The API-TC

WARNING

7. Fuel

FUEL

• 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 10 ft (3 m) away from
the fueling point before starting the engine.

■ GASOLINE REQUIREMENTS

• All 2-Stroke RedMax Products are powered by Zenoah
Professional-Commercial Duty, Hi-Performance, Hi-RPM, Air
Cooled 2-Stroke engines.
RedMax/Zenoah – Hi-Performance 2-stroke engines produce
higher HP outputs as compared to standard Home Owner Duty
or Light Commercial Duty production engines offered by most
manufacturers.

• 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.

• The RedMax/Zenoah Engines are registered and certified with
CARB (California Air Resources Board) and EPA
(Environmental Protection Agency) to operate on CLEAN Mid­grade 89 octane or Premium, unleaded (lead-free) gasoline and
RedMax Air-Cooled "Max Life", Synthetic blend Premium two­stroke engine oil mixed at 50:1 ratio.

• Unleaded gasoline is recommended to reduce the
contamination of the air for the sake of your health and the
environment.

• This Hi-Performance Air Cooled 2-stroke Engine requires the
use of Minimum

89 Octane (Mid grade or Premium)

clean gasoline. Gasoline may contain maximum of 10% Ethanol
(grain alcohol) or up to 15% MTBE (Methyl tertiary-butyl ether).
Gasoline containing Methanol (Wood Alcohol) is NOT
approved.

• IF octane rating of the Mid Grade

gasoline in your area is lower
than 89 Octane use Premium Unleaded Gasoline. The majority
of all 2-stroke engine manufacturers in the USA and Canada
recommend using gasoline with 89 Octane or higher.

• Gasoline with an octane rating lower than 89 will greatly
increase the engines operating temperature. Low octane
gasoline will cause detonation (knock) resulting in piston
seizures and major internal engine components damage.

• Poor quality gasolines or oils may damage sealing rings, fuel

WARNING

[ R+M ]

2

WARNING

NOTE

WARNING

NOTE

US-11

BCZ2450S/T

U
S

7. Fuel

test standard has been discontinued by API in 1995 and it no
longer exists.

• Gasoline/Oil mixture Storage Recommendations

Store your gasoline or gasoline/oil mixture in a cool dry area in
a tightly sealed approved container to limit the entry of moisture
and additional air (oxygen). Moisture and air cause the
development of varnish and gum, making the fuel stale. Stored
gasoline and gasoline/oil mixture ages and loses its octane
rating and volatility. Do not mix more gasoline/oil than you
intend to use in 30 days, and 60 days when fuel stabilizer is
added. RedMax Air-Cooled "Max Life" Synthetic blend
Premium two-stroke engine oil "Contains fuel stabilizer"

and
will automatically extend your gasoline/oil mixture life up to 60
days.

■ HOW TO MIX FUEL

RECOMMENDED MIXING RATIO
GASOLINE 50 : OIL 1
(when using RedMax Air-Cooled "Max
Life")

• 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 for 10seconds.

4. Pour in the rest of gasoline and agitate again for at least one
minute. As some oils may be difficult to agitate depending on oil
ingredients, sufficient agitation is necessary. Be careful that, if
the agitation is insufficient, there is an increased danger of early
piston seizure due to abnormally lean mixture.

5. Place a clear indication on the outside of the container to avoid
mixing up with gasoline or other containers that dont contain oil.

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 clean
surface.

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.

WARNING

1. Select flat and bare ground for fueling.

2. Move at least 10 feet (3 meters) 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 seizure.

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 long period of time,
clean the fuel tank after rendering it empty. Next, Start the
engine and run the carburetor dry residual fuel.

6. In the case of scrapping the used mixed oil container, scrap it
only at an authorized depository site.

• 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,
type of oil or fuel to be used. described therein, it may not be
covered by the warranty.

NOTE

50:1 MIXING CHART
GASOLINE gal. 1 2 3 4 5
2-CYCLE OIL fl.oz 2.6 5.2 7.8 10.4 13

GASOLINE liter 1 2 3 4 5
2-CYCLE OIL ml 20 40 60 80 100

IMPORTANT

WARNING

US-12

BCZ2450S/T

8. Operation

■ 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
clear tube. (OP1)

3. Move the choke lever to the closed
position. (OP2)

(1) choke lever
(2) close
(3) open

4. Set the stop switch to the "RUN"
position. Place the unit on a flat, firm
place. Keep the cutting head clear of
everything around it. (OP3)

(1) stop switch
(2) RUN
(3) STOP

(a) lockout lever
(b) throttle trigger

5. Firmly grasp (a) and (b) with left hand,
pull the starter knob 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 downward to
open the choke. And restart engine.
(OP2)

7. Allow the engine to warm up for several
minutes before starting operation.

IMPORTANT

OP1

(2)

(3)

(1)

OP2

(1)

(3)

(a)

(b)

(2)

OP3

OP4

.04 in

(1~2mm)

(1)

OP5

1. When restarting the engine
immediately after stopping it, leave the
choke open.

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.

■ STOPPING ENGINE (OP3)

1. Release the throttle lever and run the
engine for a half minute.

2. Shift the stop switch to the "STOP"
position.

• Except for an emergency, avoid
stopping the engine while pulling the
throttle lever.

■ ADJUSTING THROTTLE CABLE

• The normal play is 1 or 2mm when
measured at the carburetor side end.
Readjust with the cable adjuster as
required. (OP5)

(1) cable adjuster

■ ADJUSTING IDLING SPEED (OP6)

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 adjusting screw

• Warm up the engine before adjusting
the idling speed.

NOTE

OP6

NOTE

WARNING

IMPORTANT

(1)

US-13

BCZ2450S/T

U
S

8. Operation

OP7

■ CUTTING WORK (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 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. (OP7)

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.

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.

WARNING

US-14

BCZ2450S/T

every every every

25 50 100

system/compornent procedure before hours hours hours note

use after after after
fuel leaks, fuel spillage wipe out ✔

fuel tank, air filter, fuel filter inspect/clean ✔✔ replace, if necessary

see ■ADJUSTING replace carburetor

idle adjusting screw ✔

IDLING SPEED (p.12) if necessary
clean and readjust GAP: .025in(0.6~0.7mm)

spark plug ✔

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
debris guard make sure to attach ✔
gear case grease ✔
screws/nuts/bolts tighten/replace ✔✔not adjusting screws

ENGINE

SHAFT

■ MAINTENANCE CHART

Maintenance, replacement, or repair of the emission control device and
systems may be performed by any non-road engine repair establishment or
individual.

9. Maintenance

■ REFILLING TRIMMING LINE (MA1)

1. For replacement line, use a diameter of .095in (2.4mm). The
spool is capable for a line upto 20ft (6m) on the 4” head. Avoid
using a larger line as it may cut down the trimming
performance.

For safety reasons, do not use metalreinforced line.

2. Pinch the slotted area on the both sides of the spool housing to
unhook the bottom cap.

3. Take out the spool and pull off the old line. Fold new line so that
one half line is 4.7in.(12cm) shorter than another half. And then,
hook bended end in the slot of the spool.

4. Wind up the line in the correct direction as indicated on the
spool.

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.

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.

WARNING

MA1

US-15

BCZ2450S/T

U
S

■ MUFFLER

• Inspect periodically, the muffler for
loose fasteners, any damage or
corrosion. If any sign of exhaust
leakage is found, stop using the
machine 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

■ GEAR CASE (MA6)

• 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
depending on the job condition.

• Remove the side bolt in gear case
opposite of grease nipple before
installing new grease to arrange for old
grease to exit.

■ 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 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
muffler to become overheated, and

WARNING

• Make sure that the engine has
stopped and is cool before
performing any service to the
machine. Contact with moving
cutting head or hot muffler may
result in a personal injury.

■ AIR FILTER

• The air filter, if clogged, will reduce the
engine performance. Check and clean
the filter element. If the element is
broken or clogged, replace with a new
one. (MA2)

(1) air filter

■ FUEL FILTER

• When the engine runs short of fuel
supply, check the fuel cap and the fuel
filter for blockage. (MA3)

(1) fuel filter

■ SPARK PLUG

• Starting failure and mis-firing 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
replacement plug, use the correct type
specified by RedMax. (MA4)

• REPLACEMENT PLUG IS A NGK
CMR7H.

• Note that using any spark plug 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.

TIGHTENING TORQUE:

87~104 in-lbs

(9.8~11.8 N.m.)

IMPORTANT

MA4

(1)

MA5

9. Maintenance

(1)

MA2

(1)

MA3

MA6

WARNING

WARNING

.025 in

0.655mm

US-16

BCZ2450S/T

9. Maintenance

MA8

(1)

(2)

MA7

• 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.

10. Storage

11. Disposal

• When disposing your machine, fuel or
oil for the machine, be sure to allow
your local regulations.

that this 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 (MA7) 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. (MA7)

(1) cylinder
(2) intake air cooling vent (back)

IMPORTANT

■ 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 and cylinder exhaust port
at the same time.

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.

US-17

BCZ2450S/T

U
S

•When sharpening, removing, or reattaching the blade, be
sure to wear thick, sturdy gloves and use only proper tools
and equipment to prevent injury.

■ CHOOSE THE BLADE

Choose a suitable recommended cutting attachment according to
the object to be cut. (OPT4)

• When replacing blade always be sure to use products which
have been certified by RedMax.

(1) 9” 22-tooth : SST229
(2) 9” 24-tooth : SST249
(3) 8” 8-tooth : SGB088
(4) 9” 8-tooth : SGB089
(5) 8” 4-tooth : SGB048
(6) 9” 4-tooth : SGB049
(7) Nylon line head
(A) Under growth
(B) Heavy weeds
(C) Light weeds
(D) Grass

WARNING

■ SET UP THE BLADE

1. Detach the line head assembly. (OPT5)

2. Put on the blade, making the marked
side face the shaft side, put the holder
and the cover on, and fasten the blade
with the nut. (OPT5)

(1) Cover : 3540-13283
(2) Holder (B) : 6019-13250 (STANDARD)
(3) Nut : T3002-13260 (STANDARD)

■ BALANCE UNIT

1. Put on strap and attach unit to strap.

2. Slide clamp up or down until unit
balances with head just touching on the
ground. (OPT6)

OPT6

(1)

(3)

(2)

OPT5

12. Optional blade usage (for BCZ2450S only)

OPT1

OPT3

OPT2

• For security reason, in case of
mounting the blade on this product
and use it, purchase the blade kit
(T3195-94000) and change guard,
handle from the original ones, and
use shoulder strap.

(1) Shoulder strap : T3300-17100

Change to the debris guard which is
suitable for the metal blade. (OPT2)

TIGHTENING TORQUE :

130~174 in-lbs

(14.7~19.6 N.m.)

(1) Guard-A : 5764-24000
(2) Guard : 5766-24110
(3) Bracket : 3250-24120
(4) Bolt : 0225-10620
(5) Screw : 0263-30614
(6) Nut : 0280-10605

Change the loop handle to the J-handle
for safe operation. (OPT3)

(1) Bracket : 3583-14101
(2) J-handle : 6367-14200

IMPORTANT

OPT4

[ BCZ2450T ]

This trimmer is designed for use as
a trimmer only.
Metal blades should never be used
on this trimmer.

WARNING

WARNING

(1)

(3)
(4)

(5)
(6)

(7)

(2)

(A)

(B)

(C)

IMPORTANT

(D)

US-18

BCZ2450S/T

OPT9

OPT8

OPT7

12. Optional blade usage (for BCZ2450S only)

■ STARTING THE ENGINE

Please refer 5.For safe operation (P.6),

8.Operation (P.12).

• The product is equipped with a
centrifugal clutch mechanism, so
the cutting attachment could rotate
as soon as the engine is started.
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. (OPT7)

■ CUTTING METHOD

a) Use the front left side cutting.
b) Guide the blade from your right to left

with it tilted slightly to your left. (OPT8)

c) When mowing a wide area, start

working from your left end to avoid
interference of cut grass.

d) The blade may be seized by weeds if

the engine speed is too low, or the
blade cuts too deep into weeds. Adjust
the engine speed and cutting depth
according to the condition of object.

• If the grass or other object gets
caught in the blade, or if the unit
starts to shake or vibrate, turn off
the engine and check the whole unit.
Change the blade if it has been
damaged.

• Turn off the engine and make sure
the blade has completely stop
before checking the blade, and
removing any object got caught in.

■ OPERATION

1. Check the bolt to fasten the blade and
be sure the bolt has no fault, and no
abrasion.

2. Be sure that the blade and the holder
have been fastened according to
instruction and the blade turns
smoothly without abnormal noise.
(OPT9)

• The rotating parts fastened
incorrectly may cause serious
accident to the operator.

WARNING

•Make sure that the blade is not bent,
warped, cracked, broken or
damaged.

• If you find any error to the blade,
discard it and change new one
which is certified by RedMax.

■ 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.
(OPT10)

Make sure to use shoulder strap and
debris guard. If not, it is very
dangerous when you slip or lose your
balance.

■ CONTROLLING BLADE THRUST

• Blade thrust can cause serious
personal injury. Carefully study this
section. It is important that you
understand what causes blade thrust,
how you can reduce the chance of
blade thrust and how you can remain in
control of the unit if blade thrust does
occur.

1. What causes blade thrust:

• Blade thrust can occur when the
moving blade contacts an object that it
cannot cut. This contact causes the
blade to stop for an instant and then
suddenly move or ”bounce” away from
the object that was hit. The operator
can lose control of the unit and the
blade can cause serious personal injury
to the operator or any person nearby if
the blade contacts any part of the body.

2.

How you can reduce the chance of blade
thrust:

a. Recognize that blade thrust can

happen. By understanding and
knowing about bounce, you can
help eliminate the element of
surprise.

b. Cut fibrous weeds and grass

only. Do not let the blade contact
materials it cannot cut such as hard,
woody vines and brush or rocks,
fences, metal, etc

c. Be extra prepared for blade thrust if

you must cut where you cannot see
the blade making contact such as in

WARNING

OPT10

WARNING

WARNING

WARNING

US-19

BCZ2450S/T

U
S

■ MAINTENANCE
BLADE

• Check the blade and the fasteners for looseness, cracking, or
bending.

• Check the cutting edges and reform with a flat file.

(A) 22, 24-tooth blade
(B) 8-tooth blade
(C) 4-tooth blade

Point (OPT11) :

1. Keep the end corner sharp.

2. Round the root of the edge, using round file.

3. Do not use water when using a grinder.

• It is recommended that filing should be done by professionals.

• Especially regarding filing the 22,24-tooth blade, Leave it to the
professionals.

■ TRANSPORTING THE UNIT

• When you finish cutting in one location and wish to continue
work in another spot, turn off the engine, and lift up the unit and
carry it paying attention for the blade.

• Never forget to place the protective cover over the blades.

• When transporting the unit over long distances, detach the
blade fix the unit by ropes.

IMPORTANT

OPT11

12. Optional blade usage (for BCZ2450S only)

areas of dense growth.

d. Keep the blade sharp. A dull blade

increase the chance of blade thrust.

e. Avoid feeding the blade too rapidly.

The blade can bounce away from
material being cut if the blade is fed
faster than its cutting capability.

f. Cut only from your right to your left.

g. Keep your path of advance clear of

material that has been cut and other
debris.

3. How you can maintain the best
control:

a. Keep a good, firm grip on the unit

with both hands. A firm grip can
help neutralize bounce. Keep your
right and left hands completely
around the respective handles.

b. Keep both feet spread apart in a

comfortable stance and yet braced
for the possibility that the unit could
bounce. Do not overreach. Keep
firm footing and balance.

US-20

BCZ2450S/T

13. 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 – 0.7 mm)

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 ➞ replace
cylinder fin, fan cover ➞ clogged with dust ➞ clean

When your unit seems to need further service, please consult with our service shop in your area.

FR-1

BCZ2450S/T

F
R

848-J9T-93A0 (901)

MODE D’EMPLOI

DEBROUSSAILLEUSE

NUMEROS DE SERIE APPLICABLES :

BOITE DE COMMANDES 90200101 et au-delà
MOTEUR 90200101 et au-delà

AVERTISSEMENT

AVERTISSEMENT

Les échappements du moteur de
ce produit contiennent des
produits chimiques connus par
l’Etat de Californie comme étant
responsables de cancers,
d’anomalies congénitales et
d’autres atteintes à l’appareil
reproducteur.

Avant d’utiliser cette

ce produit

,
veuillez lire attentivement ce
manuel afin de bien comprendre le
bon fonctionnement de cet
appareil.

AVERTISSEMENT

Pour BCZ2450T:
Cette débroussailleuse est conçue
pour un usage exclusif comme
débroussailleuse.
Les lames métalliques ne doivent
être jamais utilisées sur cette
débroussailleuse.

BCZ2450T

BCZ2450S

Utilisée comme débroussailleuse seulement