Zenoah GZ4350 User manual

GZ4350
GB Operator’s manual 2-42
DE Bedienungsanweisung 43-86
EL Οδηγίεςχρήσης 87-131
ES Manual de usuario 132-174
FR Manuel d’utilisation 175-217
IT Manuale dell’operatore 218-260
PT Manual do utilizador 261-303

Contents
Introduction..................................................................... 2
Safety..............................................................................4
Assembly...................................................................... 12
Operation...................................................................... 13
Maintenance................................................................. 25
Troubleshooting............................................................ 38
Transportation and storage...........................................38
Technical data.............................................................. 39
Accessories.................................................................. 40
EC Declaration of Conformity....................................... 42
Introduction
Product description
Zenoah GZ4350 is a chainsaw model with a fuel engine.
Work is constantly in progress to improve the design
and technology - improvements that increase your
safety and efficiency. Visit your servicing dealer
regularly to see whether you can benefit from new
features that have been introduced.
Intended use
This product for forest service is designed for forest
work such as felling, limbing and cutting.
Note: National regulations can restrict the use of the
product.
Product overview GZ4350
17
16
11
14 13 12
15
18 19 20 21 22 23 24 25
1
4
2
3
8765
10
9
26
27
28
1. Air filter cover
2. Throttle trigger lockout
3. Rear handle with right hand guard
4. Information and warning decal
5. Start/stop switch
6. Fuel tank
7. Adjuster screws carburetor
8. Starter handle
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9. Starter housing
10. Chain oil tank
11. Bar tip sprocket
12. Guide bar
13. Saw chain
14. Muffler
15. Chain brake and front hand guard
16. Front handle
17. Choke control
18. Throttle trigger
19. Air purge
20. Clutch cover
21. Oil pump adjustment screw
22. Product and serial number plate
23. Chain tensioning screw
24. Chain catcher
25. Spiked bumper
26. Guide bar cover
27. Combination spanner
28. Operator's manual
Symbols on the product
Careless or incorrect use of this product can
result in serious or fatal injury to the operator
or others.
Read the operator's manual carefully and
make sure you understand the instructions
before you use this product.
Always wear approved protective helmet,
approved hearing protection and protective
goggles or a visor.
This product is in accordance with
applicable EC Directives.
Noise emission to the environment
according to the EC Directive. The product's
emission is specified in the Technical data
chapter and on the label.
Both of the operator's hands must be used
to operate the chainsaw.
Never operate the chainsaw holding it with
one hand only.
Never let the guide bar tip come in contact
with any object.
Warning! Kickback may occur when the
nose or tip of the guide bar touches an
object, and cause a lightning fast reverse
reaction, kicking the guide bar up and
towards the operator. May cause serious
personal injury.
Chain brake, activated (right). Chain brake,
not activated (left).
Choke lever in "open position".
Choke lever in "closed position".
Air purge.
Refuelling.
Chain oil fill.
Adjustment of the oil
pump.
yyyywwxxxxx
The rating plate showing
serial number. yyyy is the
production year, ww is the
production week.
Note: Other symbols/decals on the product refer to
certification requirements for certain markets.
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Safety
General safety instructions
WARNING: Read the warning instructions
that follow before you use the product.
• A chainsaw is a dangerous tool if used carelessly or
incorrectly and can cause serious injury or death. It
is very important that you read and understand the
contents of this operator’s manual.
•Under no circumstances may the design of the
product be modified without the permission of the
manufacturer. Do not use a product that appears to
have been modified by others and always use
original accessories. Non-authorized modifications
and/or accessories can result in serious personal
injury or the death of the operator or others.
• The inside of the muffler contain chemicals that may
be carcinogenic. Avoid contact with these elements
in the event of a damaged muffler.
• Long term inhalation of the engine’s exhaust fumes,
chain oil mist and dust from sawdust can represent a
health risk.
• This product produces an electromagnetic field
during operation. This field may under some
circumstances interfere with active or passive
medical implants. To reduce the risk of serious or
fatal injury, we recommend persons with medical
implants to consult their physician and the medical
implant manufacturer before operating this product.
• The information in this operator's manual is never a
substitute for professional skills and experience. If
you get into a situation where you feel unsafe, stop
and seek expert advice. Contact your servicing
dealer or an experienced chainsaw user. Do not
attempt any task that you feel unsure of!
Safety instructions for operation
WARNING: Read the warning instructions
that follow before you use the product.
• Before using a chainsaw you must understand the
effects of kickback and how to avoid them. See
instructions under the heading
What is kickback? on
page 17
.
• Never use a product that is faulty. Carry out the
safety checks, maintenance and service instructions
described in this manual. Some maintenance and
service measures must be carried out by trained and
qualified specialists. See instructions under
Maintenance on page 25
• Never use a product with visible damage to the
spark plug guard and ignition cable. A risk of
sparking arises, which can cause a fire.
• Never use the product if you are fatigued, while
under the influence of alcohol or drugs, medication
or anything that could affect your vision, alertness,
coordination or judgement.
•Do not use the product in bad weather such as
dense fog, heavy rain, strong wind, intense cold,
etcetera. Working in bad weather is tiring and often
brings added risks, such as icy ground,
unpredictable felling direction, etcetera.
• Faulty cutting equipment or the wrong combination
of guide bar and saw chain increases the risk of
kickback! Only use the guide bar and saw chain
combinations we recommend, and follow the filing
instructions. See instructions under
Accessories on
page 40
• Never start a chainsaw unless the bar, saw chain
and all covers are fitted correctly. See instructions
under the heading Assembly on page 12 . Without a
bar and saw chain attached to the chainsaw the
clutch can come loose and cause serious injury.
• Do not drop start. This method is very dangerous
because you may lose control of the chainsaw.
• Never start the product indoors. Exhaust fumes can
be dangerous if inhaled.
•Observe your surroundings and make sure that there
is no risk of people or animals coming in contact with
or affect your control of the product.
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• Never allow children to use or be in the vicinity of the
product. As the product is equipped with a spring-
loaded start/stop switch and can be started by low
speed and force on the starter handle, even small
children under some circumstances can produce the
force necessary to start the product. This can mean
a risk of serious personal injury. Therefore remove
the spark plug cap when the product is not under
close supervision.
•You must have a steady stance in order to have full
control over the chainsaw. Never work standing on a
ladder, in a tree or where you do not have a firm
ground to stand on.
• Lack of concentration can lead to kickback if the
kickback zone of the bar accidentally touches a
branch, nearby tree or some other object.
• Never use a chainsaw by holding it with one hand. A
chainsaw is not safely controlled with one hand.
•Always hold the chainsaw with both hands. The right
hand should be on the rear handle, and the left hand
on the front handle. All people, whether right or left
handed, should use this grip. Use a firm grip with
thumbs and fingers encircling the chainsaw handles.
This grip minimizes the risk of kickback and lets you
keep the chainsaw under control. Do not let go of the
handles!
• Never use the chainsaw above shoulder height and
try not to cut with the tip of the bar.
• Do not use a chainsaw in a situation where you
cannot call for help in case of an accident.
•Before moving your chainsaw, switch off the engine
and lock the saw chain using the chain brake. Carry
the chainsaw with the bar and chain pointing
backwards. Fit a guard to the bar before transporting
the chain saw or carrying it for any distance.
• When you put the chainsaw on the ground, lock the
saw chain using the chain brake and ensure you
have a constant view of the product. Switch the
engine off before leaving your chainsaw for any
length of time.
• Sometimes chips get stuck in the clutch cover
causing the saw chain to jam. Always stop the
engine before cleaning.
• Running an engine in a confined or badly ventilated
area can result in death due to asphyxiation or
carbon monoxide poisoning.
• It is not possible to cover every conceivable situation
you can face when using a chainsaw. Always
exercise care and use your common sense. Avoid all
situations which you consider to be beyond your
capability. If you still feel uncertain about operating
procedures after reading these instructions, you
should consult an expert before continuing. Do not
hesitate to contact your dealer or us if you have any
questions about the use of the chainsaw. We will
willingly be of service and provide you with advice as
well as help you to use your chainsaw both efficiently
and safely. Attend a training course in chainsaw
usage if possible. Your dealer, forestry school or
your library can provide information about which
training materials and courses are available.
Personal protective equipment
WARNING: Read the warning instructions
that follow before you use the product.
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• Most chainsaw accidents happen when the saw
chain touches the operator. You must use approved
personal protective equipment whenever you use the
machine. Personal protective equipment cannot
eliminate the risk of injury but it will reduce the
degree of injury if an accident does happen. Ask
your servicing dealer for help in choosing the right
equipment.
•Always wear personal protective equipment. Use
appropriate protections for your arms. Generally
clothes should be close-fitting without restricting your
freedom of movement. Regularly check the condition
of the personal protective equipment.
• Wear an approved protective helmet.
• Wear approved hearing protection. Long-term
exposure to noise can result in permanent hearing
impairment
• Always wear protective glasses or a face visor to
reduce the risk of injury from thrown objects. A chain
saw is capable of throwing objects, such as wood
chips, small pieces of wood, etc, at great force. This
can result in serious injury, especially to the eyes.
• Wear gloves with saw protection.
• Wear trousers with saw protection.
• Wear boots with saw protection, steel toe-cap and
non-slip sole.
• Always have a first aid kit nearby.
• Sparks can come from the muffler, the bar and chain
or other sources. Always have fire extinguishing
tools and a shovel available to help prevent forest
fires.
Safety devices on the product
WARNING: Read the warning instructions
that follow before you use the product.
In this section the product’s safety features and their
function are explained. For inspection and maintenance
see instructions under the heading
Examination,
maintenance and service of the product's safety
equipment on page 26 . See instructions under the
heading Product overview GZ4350 on page 2 to find
where these parts are located on your product.
The life span of the machine can be reduced and the
risk of accidents can increase if product maintenance is
not carried out correctly and if service and/or repairs are
not carried out professionally. If you need further
information please contact your nearest servicing dealer.
WARNING: Never use a product with
defective safety components. Safety
equipment must be inspected and
maintained. See instructions under the
heading
Examination, maintenance and
service of the product's safety equipment on
page 26
. If your machine does not pass all
the checks, take the chainsaw to a servicing
dealer for repair.
Chain brake and front hand guard
Your chainsaw is equipped with a chain brake that is
designed to stop the saw chain if you get a kickback.
The chain brake reduces the risk of accidents, but only
you can prevent them.
WARNING: Avoid situations where there is a
risk of kickback. Take care when using your
chainsaw and make sure the kickback zone
of the guide bar never touches any object.
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The chain brake (A) can either be activated manually (by
your left hand) or automatically by the inertia release
mechanism.
The brake is engaged when the front hand guard (B) is
pushed forwards.
A
B
This movement activates a spring-loaded mechanism
that tightens the brake band (C) around the engine drive
system (D) (clutch drum).
CD
The front hand guard is not designed solely to activate
the chain brake. Another important feature is that it
reduces the risk of your left hand hitting the saw chain if
you lose grip of the front handle.
The chain brake must be engaged when the chainsaw is
started to prevent the saw chain from rotating.
Use the chain brake as a ”parking brake” when starting
and when moving over short distances, to reduce the
risk of moving chain accidentally hitting your leg or
anyone or anything close by.
To release the chain brake pull the front hand guard
backwards, towards the front handle.
Kickback can be very sudden and violent. Most
kickbacks are minor and do not always activate the
chain brake. If this happens you should hold the
chainsaw firmly and not let go.
The way the chain brake is activated, either manually or
automatically by the inertia release mechanism,
depends on the force of the kickback and the position of
the chainsaw in relation to the object that the kickback
zone of the guide bar strikes. If you get a violent
kickback while the kickback zone of the guide bar is
farthest away from you the chain brake is designed to be
activated by the inertia in the kickback direction.
If the kickback is less violent or the kickback zone of the
guide bar is closer to you the saw chain brake will be
activated manually by the movement of your left hand.
In the felling position the left hand is in a position that
makes manual activation of the chain brake impossible.
With this type of grip, that is when the left hand is placed
so that it cannot affect the movement of the front hand
320 - 005 - 27.09.2017 7

guard, the chain brake can only be activated by the
inertia action.
Common questions about kickback
•Will my hand always activate the chain brake during
a kickback?
No. It takes a certain force to move the hand guard
forward. If your hand only lightly touches the front
hand guard or slips over it, the force may not be
enough to trigger the chain brake. You should also
maintain a firm grip of the chainsaw handles while
working. If you do and experience a kickback, your
hand may never leave the front handle and will not
activate the chain brake, or the chain brake will only
activate after the chainsaw has swung around a
considerable distance. In such instances, the chain
brake might not have enough time to stop the saw
chain before it touches you. There are also certain
positions in which your hand cannot reach the front
hand guard to activate the chain brake; for example,
when the saw chain is held in felling position.
•Will my inertia activated chain brake always activate
during kickback in the event of a kickback?
No. First, your brake must be in working order.
Testing the brake is simple, see instructions under
the heading Examination, maintenance and service
of the product's safety equipment on page 26 . We
recommend you do this before you begin each work
session. Second, the kickback must be strong
enough to activate the chain brake. If the chain
brake is too sensitive it would activate all the time,
which would be a nuisance.
•Will my chain brake always protect me from injury in
the event of a kickback?
No. First, the chain brake must be in working order
to provide the intended protection. Second, it must
be activated during the kickback as described above
to stop the saw chain. Third, the chain brake may be
activated but if the guide bar is too close to you the
brake might not have enough time to slow down and
stop the saw chain before the chainsaw hits you.
WARNING: Only you and proper working
technique can eliminate kickback and its
dangers.
Throttle trigger lockout
The throttle trigger lockout is designed to prevent
accidental operation of the throttle trigger. When you
press the throttle trigger lockout down (A) (in example
when you grasp the handle) it releases the throttle
trigger (B). When you let go of the handle, the throttle
trigger and the throttle trigger lockout both return to their
default positions. This design locks the throttle trigger at
idle setting.
A
B
Chain catcher
The chain catcher is designed to catch the chain if it
snaps or jumps off. This should not happen if the chain
is properly tensioned (see instructions under the
heading
Assembly on page 12 ) and if the bar and chain
are properly serviced and maintained (see instructions
under the heading Basic cutting technique on page 17 ).
Right hand guard
Apart from protecting your hand if the chain jumps or
snaps, the right hand guard stops branches and twigs
from interfering with your grip on the rear handle.
Vibration damping system
Your product is equipped with a vibration damping
system that is designed to minimize vibration and make
operation easier. The product′s vibration damping
system reduces the transfer of vibration between the
engine unit/cutting equipment and the product′s handle
unit. The body of the chainsaw, including the cutting
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equipment, is insulated from the handles by vibration
damping units.
Cutting hardwoods (most broadleaf trees) creates more
vibration than cutting softwoods (most conifers). Cutting
with cutting equipment that is blunt or faulty (wrong type
or badly sharpened) will increase the vibration level.
WARNING: Overexposure to vibration can
lead to circulatory damage or nerve damage
in people who have impaired circulation.
Contact your doctor if you experience
symptoms of overexposure to vibration.
Such symptoms include numbness, loss of
feeling, tingling, pricking, pain, loss of
strength, changes in skin colour or condition.
These symptoms normally appear in the
fingers, hands or wrists. These symptoms
may be increased in cold temperatures.
Start/stop switch
Use the start/stop switch to switch off the engine.
Muffler
The muffler is designed to keep noise levels to a
minimum and to direct exhaust fumes away from the
user.
WARNING: The exhaust fumes from the
engine are hot and may contain sparks
which can start a fire. Never start the
machine indoors or near combustible
material!
In areas with a hot, dry climate there is a high risk of
fires. These areas are sometimes subject to government
rules requiring among other things the muffler must be
equipped with an approved type of spark arrestor mesh.
WARNING: The muffler gets very hot during
and after use. This also applies during idling.
Be aware of the fire hazard, especially when
working near flammable substances and/or
vapours.
WARNING: Never use a saw without a
muffler, or with a damaged muffler. A
damaged muffler may substantially increase
the noise level and the fire hazard. Keep fire
fighting equipment handy. If a spark arrestor
screen is required in your area, never use
the saw without or with a broken spark
arrestor screen.
Fuel safety
WARNING: Read the warning instructions
that follow before you use the product.
• Make sure there is plenty of ventilation when
refuelling or mixing fuel (petrol and two-stroke oil).
•Fuel and fuel vapour are highly flammable and can
cause serious injury when inhaled or allowed to
come in contact with the skin. For this reason
observe caution when handling fuel and make sure
there is adequate ventilation.
• Take care when handling fuel and chain oil. Be
aware of the risks of fire, explosion and those
associated with inhalation.
• Do not smoke and do not place any hot objects in
the vicinity of fuel.
• Always stop the engine and let it cool for a few
minutes before refuelling.
• When refuelling, open the fuel cap slowly so that any
excess pressure is released gently.
• Tighten the fuel cap carefully after refuelling.
• Never refuel the machine while the engine is
running.
320 - 005 - 27.09.2017 9

• Always move the product at least 3 m (10 ft) away
from the refuelling area and source before starting.
After refuelling, there are some situations where you
must never start the product:
•If you have spilled fuel or chain oil on the product.
Wipe off the spillage and allow remaining fuel to
evaporate.
• If you have spilled fuel on yourself or on your
clothes. Change your clothes and wash any part of
your body that has come in contact with fuel. Use
soap and water.
• If the product leaks fuel. Regularly do a check for
leaks from the fuel cap and fuel lines.
Safety instructions for maintenance
Cutting equipment
This section describes how to choose and maintain your
cutting equipment in order to:
• Reduce the risk of kickback.
• Reduce the risk of the saw chain breaking or
jumping off the bar.
• Obtain optimal cutting performance.
• Extend the life of cutting equipment.
• Avoid increasing vibration levels.
WARNING: Read the warning instructions
that follow before you use the product.
• Faulty cutting equipment or the wrong combination
of bar and saw chain increases the risk of kickback!
Only use the bar/saw chain combinations we
recommend, and follow the filing instructions. See
instructions under the heading
Accessories on page
40 .
• Always use protective gloves when you handle the
saw chain.
•Any contact with a rotating saw chain can cause
extremely serious injuries.
• Keep the chain’s cutting teeth properly sharpened!
Follow our instructions and use the recommended
file gauge. A damaged or badly sharpened chain
increases the risk of accidents.
• Maintain the correct depth gauge setting! Follow our
instructions and use the recommended depth gauge
clearance. Too large a clearance increases the risk
of kickback.
• Keep the chain properly tensioned! If the chain is
slack it is more likely to jump off and lead to
increased wear on the bar, chain and drive sprocket.
• Keep cutting equipment well lubricated and properly
maintained! A poorly lubricated chain is more likely
to break and lead to increased wear on the bar,
chain and drive sprocket.
Some terms that describe the bar and chain
To maintain the safety features of the cutting equipment,
you should replace a worn or damaged bar or chain with
a guide bar and saw chain combinations recommended
by Zenoah. See instructions under the heading
Accessories on page 40 for a list of replacement bar
and chain combinations we recommend.
Guide bar
10 320 - 005 - 27.09.2017

• Length (inches/cm)
L
• Number of teeth on bar tip sprocket (T).
• Chain pitch (inches). The spacing between the drive
links of the chain must match the spacing of the
teeth on the bar tip sprocket and drive sprocket.
PITCH = D
D
2
• Number of drive links. The number of drive links is
determined by the length of the bar, the chain pitch
and the number of teeth on the bar tip sprocket.
• Bar groove width (inches/mm). The groove in the bar
must match the width of the chain drive links.
• Chain oil hole and hole for chain tensioner. The bar
must be matched to the chain saw design.
Saw chain
•Chain pitch (inches)
PITCH = D
D
2
• Drive link width (mm/inches)
• Number of drive links.
Cutting equipment designed to reduce kickback
The only way to avoid kickback is to make sure that the
kickback zone of the bar never touches anything. By
using cutting equipment with ”built-in” kickback reduction
and keeping the chain sharp and wellmaintained you
can reduce the effects of kickback.
Guide bar
The smaller the tip radius the lower the chance of
kickback.
Saw chain
A chain is made up of a number of links, which are
available in standard and low-kickback versions.
320 - 005 - 27.09.2017 11

WARNING: No saw chain design eliminates
the danger of kickback.
Assembly
Introduction
WARNING: Read and understand the safety
chapter before you assemble the product.
WARNING: Always wear protective gloves
when you assemble the saw chain.
WARNING: The start/stop switch
automatically returns to run position. In order
to prevent unintentional starting, the spark
plug cap must be removed from the spark
plug when assembling, checking and/or
performing maintenance.
To assemble the guide bar and saw
chain
1. Move the front hand guard towards the front handle
to disengage the chain brake.
2. Remove the bar nuts and the clutch cover. Remove
the transportation guard (A).
A
3. Put the guide bar over the bar bolts. Steer the guide
bar to its most rear position. Lift the saw chain above
the drive sprocket and engage it in the groove on the
guide bar. Start on the top edge of the guide bar.
4. Make sure that the edges of the cutting links are
turned forward on the top edge of the guide bar.
5. Assemble the clutch cover and steer the chain
adjuster pin to the hole in the guide bar. Make sure
that the drive links of the saw chain fit correctly on
the drive sprocket. Also make sure that the saw
chain is correctly engaged in the groove in the guide
bar. Tighten the bar nuts finger tight.
12 320 - 005 - 27.09.2017

6. Tighten the saw chain by turning the chain
tensioning screw clockwise with the combination
spanner. Tighten the saw chain until it does not sag
from below the guide bar. See instructions under the
header
To tension the saw chain on page 33
7. The saw chain is tightened correctly as it does not
sag from the below the guide bar, but you can turn it
easily by hand. Hold up the guide bar tip and tighten
the bar nuts with the combination spanner.
8. Do a check of the chain tension frequently, after you
have assembled a new saw chain, until the saw
chain is run-in.
9. Do a check of the chain tension regularly. A correct
chain tension results in good cutting performance
and a long life.
To assemble a spiked bumper
To assemble a spiked bumper, consult your servicing
dealer.
Operation
Introduction
WARNING: Read and understand the safety
chapter before you use the product.
WARNING: The start/stop switch
automatically returns to run position. In order
to prevent unintentional starting, the spark
plug cap must be removed from the spark
plug when assembling, checking and/or
performing maintenance.
WARNING: Always wear personal protective
equipment. See header
Personal protective
equipment on page 5
To do a function check before you use
the product
1. Do a check of the chain brake to make sure that it
operates correctly and that it is not damaged.
2. Do a check of the rear right hand guard to make sure
that it is not damaged.
3. Do a check of the throttle lockout to make sure that it
operates correctly and that it is not damaged.
4. Do a check of the start/stop switch to make sure that
it operates correctly and that it is not damaged.
5. Make sure that there is no oil on the handles.
6. Do a check of the anti vibration system to make sure
that it operates correctly and that it is not damaged.
7. Do a check of the muffler to make sure that it is
correctly attached and that it is not damaged.
8. Do a check of the chain saw to make sure that all
parts are correctly attached and not damaged or
missing.
9. Do a check of the chain catcher to make sure that it
is attached correctly.
10. Do a check of the chain tension.
710
9
1
2
3
6,8
4
Fuel
This product have a two-stroke engine and must always
run on a mixture of gasoline and two-stroke oil.
Gasoline
•Use unleaded or leaded gasoline of a good quality.
• The lowest recommended octane grade is 90 (RON).
There is a risk that use of lower grade causes
knocking. This gives rise to a high engine
320 - 005 - 27.09.2017 13

temperature and increased bearing load, which
results in serious engine damages.
•We recommend a higher octane when you do work
with continuous high revs, for example when you use
the limbing technique.
Ethanol fuel
Zenoah recommends commercial available fuel with
maximum 10% ethanol contents.
Running-in
Do not run the engine at unloaded full throttle for
extended periods during the first 10 hours.
Two-stroke oil
• For best results and performance use Zenoah two-
stroke oil, which is specially formulated for our two-
stroke engines. Mixture 1:50 (2%).
• If Zenoah two-stroke oil is not available, use a
different two-stroke oil of good quality that is
formulated for air-cooled engines. Consult your
servicing dealer when you select an oil.
• Do not use two-stroke oil for water-cooled outboard
engines, also referred to as outboard oil.
• Do not use oil intended for four-stroke engines.
Gasoline, l Two-stroke oil,
l
2% (1:50)
5 0,10
10 0,20
15 0,30
20 0,40
To mix gasoline and two-stroke oil
CAUTION: There is a risk that small errors
influence the ratio of the mixture drastically
when you mix small quantities of fuel.
Carefully measure the quantity of oil to be
mixed to make sure that you get the correct
mixture.
1. Fill half the quantity of the gasoline to be used.
2. Add the full quantity of oil and mix (shake) the fuel
mixture.
3. Add the remaining quantity of gasoline.
4. Carefully mix (shake) the fuel mixture and fill the fuel
tank of the product.
5. Empty and clean the fuel tank if you do not use the
product for some time.
Note: Do not mix fuel for more than 1 month at a time
and always mix gasoline and oil in a clean container
intended for fuel.
Chain oil
All Zenoah chainsaws have an automatic chain
lubrication system. On some models the oil flow is also
adjustable.
Chain oil must show good adherence to the saw chain
and also keep its flow characteristics during warm
summer and cold winter weather.
The chain oil from Zenoah has a vegetable oil base and
is also biodegradable. We recommend you to use of our
chain oil for maximum saw chain life and to minimise
environmental damage. If this chain oil is not available,
we recommend you to use a standard chain oil.
The fuel runs out before the chain oil from the two tanks.
This is a safety feature and it is necessary that you
follow the requirements below:
• Use an oil of the right grade (suitable viscosity
range) to agree with the air temperature. If the oil is
too thin it will run out before the fuel. In temperatures
below 0°C (32°F) some oils become too viscous.
This can cause the oil pump to overload and result in
damage to the oil pump components.
• Adjust the carburetor as recommended. A lean
mixture causes the chain oil tank to empty before the
fuel tank.
• Use the recommended cutting equipment. A guide
bar that is too long will use more chain oil.
WARNING: Do not use waste oil! Waste oil
is dangerous to you and the environment.
Waste oil also causes damage to the oil
pump, the guide bar and the saw chain.
WARNING: Deficiente lubrication of the
cutting equipment can cause the saw chain
to break, which can cause serious injury or
death.
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Consult your servicing dealer when you select a chain
oil.
To fill the fuel tank
1. Clean the area around the fuel tank cap.
2. Shake the container and make sure that the fuel is
fully mixed.
3. Fill the fuel tank and the chain oil tank at the same
time. The capacities of the chain oil tank and fuel
tank are carefully correlated.
4. Tighten the fuel tank cap carefully.
5. Move the product 3 m (10 ft) or more away from the
refueling area and source before starting.
CAUTION: Contamination in the tanks
causes malfunction. Clean the fuel tank and
chain oil tank regularly and replace the fuel
filter one time a year or more.
To start the product
Note: There is a simplified start reminder with
illustrations, that shows you how to start the product, on
the rear edge of the product.
To prepare start with a cold engine
1. Move the front hand guard forward to engage the
chain brake.
WARNING: The chain brake must be
engaged when the chainsaw is started to
decrease the risk that the saw chain
touches you during start.
2. Press the air purge again and again until fuel starts
to fill the bulb. The bulb does not need to be
completely filled up.
3. Set the choke control in the choke position.
To prepare start with a warm engine
1. Move the front hand guard forward to engage the
chain brake.
WARNING: The chain brake must be
engaged when the chainsaw is started to
decrease the risk that the saw chain
touches you during start.
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2. Press the air purge again and again until fuel starts
to fill the bulb. The bulb does not need to be
completely filled up.
Note: Do not set the choke control in the choke
position.
To start the product
1. Hold the front handle with your left hand.
2. Put your right foot on the lower section of the rear
handle and press the product against the ground.
WARNING: Make sure you have safe
stands and that the saw chain cannot
touch anything.
3. Pull the starter handle with your right hand and pull
out the starter cord slowly until you feel resistance
(as the starter pawls engage).
4. Pull the cord powerfully until the engine starts.
WARNING: Do not twist the starter cord
around your hand.
CAUTION: Do not pull the starter cord to
full extension and do not let go of the
starter handle when the starter cord is
fully extended. This can cause damage
the product.
5. If you start the product with a cold engine, push in
the choke control as soon as the engine fires. This
can be heard from a "puff" sound.
6. The speed of the engine must be set to idle when
the chain brake is still engaged. Quickly disengage
the throttle trigger lockout. This prevents too much
wear to the clutch, clutch drum and brake band.
7. Pull the front hand guard back towards the front
handle to disengage the chain brake. Use the
product.
To stop the product
1. Push the start/stop switch down to stop the engine.
2. Remove the spark plug cap to prevent accidental
starting.
WARNING: The start/stop switch
automatically returns to run position. In order
to prevent unintentional starting, the spark
plug cap must be removed from the spark
plug when assembling, checking and/or
performing maintenance.
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Basic cutting technique
Below we describe some general terms that are
applicable to basic cutting technique:
•To cut from above = To cut on the pull stroke. This
means that the saw chain pulls through the tree and
that the chainsaw body lies on the trunk when you
cut. To cut on the pull stroke gives the operator
better control of the chainsaw and the position of the
kickback zone.
• To cut from below = To cut on the push stroke. This
means that the saw chain tries to push the chainsaw
against the operator.
WARNING: Be careful when you cut with
the top edge of the guide bar. If the saw
chain gets caught in the trunk, the
chainsaw can be pushed against you.
Unless you prevent this force there is a
risk that the only the kickback zone of
the guide bar touches the tree, which will
lead to a kickback.
• Cutting = General term for cutting through wood.
•Limbing = Cutting branches off a felled tree.
• Splitting = When the object you are cutting breaks off
before the cut is complete.
What is kickback?
WARNING: Kickback can happen very
suddenly and violently; kicking the
chainsaw, guide bar and saw chain back at
the user. If this happens when the saw chain
is moving it can cause very serious, even
fatal injuries. It is vital you understand what
causes kickback and that you can avoid it by
taking care and using the correct working
technique. By being prepared you reduce
the risk.
The word kickback is used to describe the sudden
reaction that causes the chainsaw and guide bar to jump
off an object when the upper quadrant of the tip of the
bar, known as the kickback zone, touches an object.
Kickback always occurs in the cutting plane of the guide
bar. Normally the chainsaw and guide bar are thrown
backwards and upwards towards the user. However, the
chainsaw may move in a different direction depending
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on the way it was being used when the kickback zone of
the guide bar touched the object.
Kickback only occurs if the kickback zone of the guide
bar touches an object.
To consider before making a cut
•Make sure to always use full throttle when cutting!
• Make sure to reduce the speed to idle after every
cut.
CAUTION: Running the engine for too
long at full throttle without any load, for
instance without any resistance from the
saw chain during cutting, can lead to
serious engine damage.
• Be careful so that the cutting equipment does not
jam in the cut. Two factors decide whether the saw
chain will jam or the object that you are cutting will
split: the first is how the object is supported before
and after cutting, and the second is whether it is in
tension.
WARNING: If the saw chain jams in the
cut: Stop the engine! Don’t try to pull the
chainsaw free. If you do you may be
injured by the saw chain when the
chainsaw suddenly breaks free. Use a
lever to open up the cut and free the
chainsaw.
• Make sure the object you are cutting will not split.
• Make sure the saw chain will not strike the ground or
any other object during or after cutting.
• Consider whether there is a risk of kickback.
• Examine if the conditions and surrounding terrain
affect how safely you can stand and move about
safely. Check the area around you for possible
obstacles such as roots, rocks, branches, ditches
etcetera. Take great care when working on sloping
ground.
In most cases you can avoid problems by cutting in two
stages; from the top and from the bottom. You need to
support the object so that it will not trap the saw chain or
split during cutting.
To use the limbing technique
When limbing thick branches you should use the same
approach as for cutting.
1. Make sure that you can stand and move about
safely.
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2. Cut difficult branches piece by piece.
12
3
WARNING: Take great care when
removing small branches and avoid
cutting bushes, for instance when you
cut many small branches at the same
time. Small and light branches can be
grabbed by the saw chain and thrown
back at you. Even if this does not need
to be a danger, you may be surprised
and lose control of the chainsaw which
can cause serious injury.
3. Work on the left side of the trunk. Work as close as
possible to the chainsaw for maximum control. If
possible, let the weight of the chainsaw rest on the
trunk.
WARNING: A majority of kickback
accidents occur during limbing. Do not
use the kickback zone of the guide bar.
Be extremely cautious and avoid
contacting the log, other limbs or objects
with the nose of the guide bar. Be
extremely cautious of limbs under
tension. They can spring back toward
you and cause loss of control resulting in
serious injury.
4. Keep the trunk between you and the chainsaw as
you move along the trunk.
To use the cutting technique
1. If you have a pile of logs, remove each log you
attempt to cut from the pile and place it on a saw
horse or runners. Cut every log individually.
WARNING: Never attempt to cut logs
while they are in a pile or when a couple
of logs are lying together. Such
procedures drastically increase the risk
of kickback which can result in a serious
or fatal injury.
2. Remove the cut pieces from the cutting area.
WARNING: If you leave cutting pieces in
the cutting area, you increase the risk for
inadvertently getting a kickback, as well
as increasing the risk of losing your
balance while working.
3. If you cut the log on the ground there is a small risk
that the saw chain will jam or that the object will split.
However, there is a risk that the saw chain will touch
the ground when you finish the cut.
a) Cut all the way through the log from above. Avoid
letting the saw chain touch the ground as you
finish the cut. Maintain full throttle but be
prepared for what might happen.
b) If it is possible, stop cutting about 2/3 of the way
through the log, turn the log and finish the cut
from the opposite side.
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4. If the log is supported at one end there is a high risk
that it will split.
a) Start by cutting from below (about 1/3 of the way
through).
b) Finish by cutting from above so that the two cuts
meet.
5. If the log is supported at both ends there is a high
risk that the saw chain will jam.
a) Start by cutting from above (about 1/3 of the way
through).
b) Finish by cutting from below so that the two cuts
meet.
The tree felling technique
WARNING: It takes a lot of experience to fell
a tree. Inexperienced users of chainsaws
should not fell trees. Do not attempt any task
that you feel unsure of!
Safe distance
The safe distance between a tree that is to be felled and
anyone else working nearby is at least 2 1/2 tree
lengths.
Make sure that no one else is in this ”risk zone” before
or during felling.
Felling direction
The aim is to fell the tree in a position where you can
limb and cross-cut the log as easily as possible. You
want it to fall in a location where you can stand and
move about safely.
Once you have decided which way you want the tree to
fall you must judge which way the tree would fall
naturally. Several factors affect this:
•Lean of the tree
• Bend
• Wind direction
• Arrangement of branches
• Weight of snow
• Obstacles within the reach of the tree: for example,
other trees, power lines, roads and buildings.
• Look for signs of damage and rot in the stem, this
makes it more probably that the tree will break and
start to fall before you expect it to.
You may find you are forced to let the tree fall in its
natural direction because it is impossible or dangerous
to try to make it fall in the direction you first intended.
Another very important factor, which does not affect the
felling direction but does affect your safety, is to make
sure the tree has no damaged or dead branches that
might break off and hit you during felling.
The main point to avoid is letting the tree fall onto
another tree. It is very dangerous to remove a trapped
tree and there is high accident risk. See instructions
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