Zenoah Chainsaw EB4401 User Manual

848-L3A-93A1 (704)

OWNER/OPERATOR MANUAL

BACKPACK BLOWER

EB4401

Thank you for purchasing a RedMax

product.

WARNING

Before using our blower, please read

this manual carefully to understand the

proper use of your unit.

The engine exhaust from this product

contains chemicals known to the State

of California to cause cancer, birth

defects or other reproductive harm.

APPLICABLE SERIAL NUMBERS :

310001 and up

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Read this manual carefully to understand all

safety precautions, controls, proper operation

and maintenance of your RedMax blower.

Failure to do so could result in serious injury.

SAFETY FIRST

Instructions contained in warnings within this manual and warning seals marked

with a

symbol on the blower 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.

Note that there may be times when warning seals peel off or become soiled and

impossible to read. If this happens, you should contact the dealer from which you

purchased the product to order new seals and affix the new seal(s) in the

required location(s).

■ Notes on types of warnings

Instructions labeled as shown at left, concern critical steps or

WARNING

procedures which must be followed in order to prevent accidents

which could lead to serious bodily injury or death.This mark is

used to indicate instructions which must be followed without

exception.

Instructions labeled as shown at left concern steps or procedures

IMPORTANT

which, if not followed correctly, could lead to mechanical failure,

breakdown, or damage.

Used to label supplementary instructions designed to provide

NOTE

hints or directions useful in the use of the product.

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CONTENTS

SAFETY PRECAUTIONS·······························································4

OPERATOR

USE OF BLOWER

FUEL

WORKING CONDITION

AVOID NOISE PROBLEM

AVOID CHANCES OF DAMAGE

WARNING LABELS ON THE MACHINE·······································7

SYMBOLS ON THE MACHINE······················································8

PARTS LOCATION & SPECIFICATIONS ······································9

ASSEMBLY ····················································································9

BLOWER TUBE

FUEL·····························································································10

HOW TO MIX FUEL

FUELING THE UNIT

OPERATION·················································································12

CONTROL ARM

STARTING ENGINE

ADJUSTING IDLE SPEED

STOPPING ENGINE

MAINTENANCE ···········································································14

AIR CLEANER

FUEL FILTER

SPARK PLUG

MUFFLER

SPARK ARRESTER

AIR INLET NET

SHOULDER STRAP

STORAGE ····················································································16

DISPOSAL····················································································16

PARTS LIST ·················································································17

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Safety Precautions

some other form of anti-slip protection to

help protect you against falling.

WARNING

•To reduce the risk of injury associated with

objects being drawn into rotating parts, do

not wear loose clothing, scarves, neck

chains, unconfined long hair, and the like.

•Read this Blower 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.

■ USE OF BLOWER

• 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 blower until it has been

repaired.

•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.

IMPORTANT

• Before starting operation, always make

sure to check if any obstacles are left

inside the volute case. The obstacles may

cause damage on fan and volute case and

serious injury.

• Always be sure to include this manual

when selling, lending, or otherwise

transferring the ownership of this product.

■ OPERATOR

• Refrain from operating the blower if you are

tired, ill, or upset, or if you are under the

influence of alcohol, drugs or medication.

WARNING

Check to see if the shock-absorbing rubber

mount has become cracked or otherwise

damaged. Note that failing to replace this

rubber mount when it has become

cracked or damaged may cause the

engine to come loose from its frame

during use, thus resulting in possible

serious bodily injury.

• To reduce the risk of hearing loss

associated with sound level(s), hearing

protection is required.

• Always wear eye protection and foot

protection. Eye protection should meet

the requirements of ANSI Z87.1.

•If cracked, be sure to replace without delay.

• To reduce the risk of injury associated with

the inhalation of dust, use a face filter mask

in dusty conditions.

• Wear rubber-soled shoes or shoes with

4 

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Safety Precautions

■ FUEL

WARNING

•To reduce the risk of injury associated with

contacting rotating parts, stop the engine

before installing or removing attachments.

Do not operate without net in place.

Always disconnect the spark plug before

performing maintenance or accessing

movable parts.

To reduce the risk of fire and burn injury:

• Handle fuel with care. It is highly

flammable.

• Do not smoke while handing fuel.

• Do not refuel a hot engine.

• Do not refuel a running engine.

• Avoid spilling fuel or oil. Always wipe unit

dry before using.

• Move at least 10 ft. (3 meters) away from

the fueling point before starting engine.

• Always store gasoline in a container

approved for flammable liquids.

• Make sure the unit is properly assembled

and in good operating condition.

•Do not allow children to use blower. Make

sure that each person you authorize to

operate the blower understands all of the

safety rules in this manual.

• Avoid using any accessory or attachment

other than those bearing the RedMax mark

for use with the blower.

• Drain the fuel from the fuel tank before

transporting or storing the blower.

• When storing the blower, choose a space

indoors free from moisture and out of the

reach of children.

• Examine the blower at intervals for loose

fasteners and rusted or damaged parts.

Use special care around the fuel line, the

muffler, and the ignition wiring.

■ WORKING CONDITION

• Check the work area that the blower will be

used in and remove or cover all valuables

that may be damaged by the air blast or

thrown debris.

• To reduce the risk of injury associated with

exhaust fume inhalation, do not operate in

unventilated area. The exhaust gases

contain harmful carbon monoxide.

• All engine service except for those

described in this manual should be

performed by competent service personnel.

Improper service to the blower fan and

muffler could cause a hazardous failure.

• Do not allow bystanders in work area.

• Do not point the blower nozzle in the

direction of people or pets.

5 

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Safety Precautions

• Avoid using the blower where stable footing

and balance are not assured.

■ AVOID NOISE PROBLEM

NOTE

• 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.

Check and follow the local regulations

as to sound level and hours of

operations for blower.

• 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.

•To reduce sound levels, limit the number of

pieces of equipment used at any one time.

• Operate power blowers at the lowest

possible throttle speed to do the job.

• Check your equipment before operation,

especially the muffler, air intakes and air

filters.

• Never to 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. These metallic

parts reach high temperatures during

operation and doing so could result in

serious burns.

•Loosen compacted leaves, grass or debris

with a rake or broom beforehand, so that

the lowest possible throttle setting would

get the job done.

• In dusty conditions, slightly dampen

surfaces or use mister attachment when

water is available.

■ AVOID CHANCES OF DAMAGE

•Watch out for children, pets, open windows

or freshly washed cars, and blow debris

safely away.

•Use the full blower nozzle extension so the

air stream can work close to the ground.

• After using blowers and other equipment,

CLEAN UP! Dispose of debris in trash

receptacles.

•Always check to be sure that no debris has

been blown onto someone else’s property.

6 

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Warning labels on the machine

(1) Read owner's manual before operating this machine.

(2) Wear head, eye and ear protection.

(3) Handling this machine improperly could result in accidents causing serious injury or

death. Read this manual carefully and practice using the blower until you are fully

acquainted with all operations and have learned to use it correctly.

IMPORTANT

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).

WARNING

Never modify your machine.

We won't warrant the machine, if you use the remodeled machine or you don't observe

the proper usage written in the manual.

7 

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Symbols on the machine

For safe operation and maintenance, symbols are

carved in relief on the machine. According to these

indications, please be careful not to make a

mistake.

(a) The port to refuel the "MIX GASOLINE"

Position: FUEL TANK CAP

(b) The direction to close the choke

Position: AIR CLEANER COVER

Information du moteur importante

Ce moteur est conforme aux reglements U.S. EPA

PH1 pour les petits moteurs du offroad.

Période de l'acquiescement : CATEGORY A

Type de moteur : 7KZXS.0424ST ; EM^*1

Cylindree du moteur : 41cc

IMPORTANT ENGINE INFORMATION

THIS ENGINE CONFORMS TO U.S. EPA PH1

FOR SMALL OFF-ROAD ENGINES.

COMPLIANCE PERIOD : CATEGORY A

ENGINE FAMILY : 7KZXS.0424ST ; EM^*1

ENGINE DISPLACEMENT : 41cc

Se fererer au manuel de l’utilisateur pour les specifications

d’entretien et les reglages.

FABRIQUE PAR:

REFER TO OWNER’S MANUAL FOR MAINTE-

NANCE, SPECIFICATIONS AND ADJUSTMENTS.

MANUFACTURED:

ZENOAH CO.,LTD.

Utilise JASO FC ou ISO EGC 50:1 Huile.

ZENOAH CO.,LTD.

USE JASO FC OR ISO EGC GRADE 50:1 OIL.

*1: The year will be changed every year of

manufacturing.

*1: L'année changera chaque année de la

fabrication.

8 

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Parts Location & Specifications

MODEL EB4401

Dimensions ( L x W x H )

Dry Weight

mm ( in )

kg ( lbs )

480 x 535 x 495 (189 x 211 x 195)

8.8 (19.3)

Fuel Tank Capacity

Engine Type

liter ( fl. oz )

2.0 (67.6)

Air cooled 2-cycle gasoline engine

Piston Displacement

Air Filter

Carburetor ( Diaphragm )

Ignition System

Spark Plug

cc ( cu. in )

valve type

41.5 (2.53)

Regular size

Rotary

C.D.I

Champion RJ6C (Noise-proof)

Muffler

Spark arrester equipped

Durability Period

Operating Engine Speed

hrs

rpm

300

2,000 to 6,500

ø57

PIPE END

Fuel Consumption

Average Air Volume

Max.Air Volume (w/o Pipes)

Max.Air Velocity

liter/h ( fl. oz/h )

cu. m/min ( cfm )

m/sec ( mph )

dB(A)

1.7 (57.5)

11 (388)

19 (671)

82 (183)

Noise Level

Assembly

■ BLOWER TUBES

1.Connect the blower and swivel joint with

flexible hose. Clamp both ends of the

flexible hose securely with the hardware

supplied with the unit.

2.Align the protrusion and the groove

provided on the tube ends and twist the

tube until connection is locked up.

9 

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Fuel

■ RECOMMENDED MIXING RATIO

WARNING

GASOLINE 50:OIL 1

(When using RedMax/ZENOAH genuine oil)

• 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.

50:1 MIXING CHART

GASOLINE gal.

2-CYCLE OIL fl.oz 2.6 5.2 7.8 10.4 13

GASOLINE liter

2-CYCLE OIL ml 20

80 100

• 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.

• 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 water-

cooling type) mixed oil.

• 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

IMPORTANT

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.

10 

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Fuel

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 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. In the case of storing the product for a

long period of time, clean the fuel tank

after rendering it empty. Next, activate the

engine and empty the carburetor of the

composite fuel.

6. In the case of scrapping the used mixed

oil container, scrap it only at an authorized

repository site.

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.

NOTE

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.

■ 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.

WARNING

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.

11 

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Operation

■ CONTROL ARM

■ STARTING ENGINE

1.Hold the upper end of the control arm in

hand and, while pulling it away from the

unit, rotate arm forward (anti-clockwise as

the arrow direction) until it clicks. (The first

position)

IMPORTANT

• Avoid operating the blower with the

flexible tube and swivel joint

disconnected. That will reduce the

cooling air and the engine could be

damaged by overheating.

1.Push the primer bulb until fuel flows out in

the clear tube.

2.When the engine is cool, close the choke.

And if you want, you can rotate arm more

forward until it clicks. (The second

position)

Choose the arm position according to your

working condition.

3.Set the throttle lever in 1/3 open position.

Full Throttle

About 1/3 Open

Idling

4.To start, hold the top of the blower firmly

with your left hand. Pull the starter knob

slowly until you feel it engage and then

give it a vigorous strong pull.

To fold the arm, reverse the order.

IMPORTANT

•Avoid pulling the starter rope out to its

full extent and allowing the starter rope

to snap back. This will prevent

premature damage to the starter.

• Do not let a person stand near the

blower or the exhaust port.

5.Once the engine is running, gradually open

12 

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Operation

the choke if it was set closed, and let the

engine run at idle speed for a minute to

warm it up.

NOTE

•When the engine fails to start after several

attempts due to overchoking, open the

choke and repeat pulling the rope.

■ ADJUSTING IDLE SPEED

•The idling speed is set for 2000 rpm at the

factory. If it is necessary to adjust the idle

speed, use the adjustment screw on the

top side of carburetor.

■ STOPPING ENGINE

•Move the throttle lever to the idling position

and press the stop switch (red button) until

the engine comes to a complete stop.

Stop Switch

13 

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Maintenance

attached, the cleaner will not seal properly

and the dusts come into the cylinder.

Maintenance, replacement, or repair of

the emission control device and systems

may be performed by any non-road

engine repair establishment or individual.

WARNING

• Make sure that the engine has stopped

and is cool before performing any

service to the blower. Contact with

rotating blower fan or hot muffler may

result in a personal injury.

■ FUEL FILTER

• A clogged fuel filter may cause poor

acceleration of the engine. Check

periodically to see if the filter is clogged

with dirt. The filter can be taken out of the

fueling port using a small wire hook.

Disconnect the filter assembly from the fuel

pipe and unhook the retainer to

disassemble it. Clean the components with

gasoline.

■ AIR CLEANER

• Never operate the blower without an air

filter or with a deformed or broken filter

element.

• C h e c k the air cleaner every 25 hours

of use or more frequently if used under

dusty conditions. A clogged air filter

may increase fuel consumption while

cutting down the engine power. Never

operate the blower without the air filter

or with a deformed filter element

because unfiltered dusty air will quickly

ruin the engine.

CLEANING AIR FILTER:

1.Remove the air cleaner cover by pulling

the tab on bottom and take out the filter

element.

■ SPARK PLUG

•The spark plug may gather carbon deposits

on its firing end with reasonable use.

Remove and inspect the spark plug every

25 hours and clean the electrodes as

necessary with a wire brush. The spark gap

should be adjusted to .025 in (0.6~0.7mm).

2.Use neutral detergent and warm water to

clean the filter element. After cleaning, air

dry the element completely and moisten

with a small amount of motor oil.

• Plug manufacturers recommend replacing

the plug twice a year to avoid unexpected

plug failure in a job.

3.Place the filter element into the air cleaner

housing and press the cover against the

housing until it clicks. Never forget to

attach the screen. If the screen is not

REPLACEMENT PLUG IS A CHAMPION

RJ6C.

14 

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Maintenance

IMPORTANT

•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.

■ MUFFLER

■ AIR INLET NET

WARNING

IMPORTANT

• Inspect periodically, the muffler for loose

fasteners, any damage or corrosion. If any

sign of exhaust leakage is found, do not

use the blower and have it repaired

immediately.

• Blowing air is taken in from the air inlet net.

When air flow has dropped down during

operation, stop the engine and inspect the

air inlet net for blocking by obstacles.

• Note that failure to remove any such

obstacles may result in the engine

becoming overheated and damaged.

• Note that failing to do so may result in

the engine catching on fire.

IMPORTANT

• Before starting operation, always make

sure to check if the muffler is properly held

by three bolts to the cylinder. (Fastening

Torque : 80~120kg·cm)

•Even if one bolt out of three bolts is loose,

the muffler may get loose during operation

which may result in engine catching on fire.

WARNING

■ 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.

• Never use the blower without the net of

the blower. Before each use, check that

the net is attached in place and is free

from any damage.

15 

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Maintenance

■ SHOULDER STRAP

WARNING

• If the shoulder strap is damaged it may

break during use, thus causing the product

to fall and resulting in personal injury.

Follow the instructions below to replace the

shoulder strap.

• Pass the upper end of the strap through the

hanger, making the FLAPPED SIDE

OUTSIDE.

• The flap on the end of the strap works

as a stopper. Never install the strap with

the flapped side inside, or the unit may

fall from the operator, which could

result in injury to the operator and/or

damage to the unit.

• Put the end of the strap through the ring on

the strap, and then push the ring toward

the hanger as close as possible.

Disposal

• When disposing your machine, fuel or oil

for the machine, be sure to allow your local

regulations.

Storage

BEFORE STORING THE BLOWER:

1.Drain a fuel tank and push the primer bulb

until it becomes empty of fuel.

2.Remove the spark plug and drop a

spoonful of 2-cycle oil into the cylider.

Crank the engine several time and replace

the plug.

16 

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Parts List

BACKPACK BLOWER

EB4401

NOTE :

1. Use RedMax/ZENOAH genuine parts as specified in the parts list for repair and/or

replacement.

2. RedMax/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.]

July 2004

APPLICABLE SERIAL NUMBERS :

310001 and up

17 

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