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  
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  
(c) The direction to open 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 )  
cu. m/min ( cfm )  
m/sec ( mph )  
dB(A)  
1.7 (57.5)  
11 (388)  
19 (671)  
82 (183)  
72  
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.  
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  
• 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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