Ryobi OCS1825 User manual

ORIGINAL INSTRUCTIONS
Cordless Chainsaw
OCS1825

Important!
It is essential that you read the instructions in this manual before assembling,
operating, and maintaining the product.
Subject to technical modification.

1
Safety, performance, and dependability have been given
top priority in the design of your cordless chainsaw.
INTENDED USE
The product is only intended for use outdoors in a well-
ventilated area. For safety reasons the product must be
adequately controlled by using two-handed operation at all
times.
The product is designed for cutting branches, trunks, logs,
and beams of a diameter determined by the cutting length
of the guide bar. It is only designed to cut wood. It is only
to be used in domestic application by adults who have
received adequate training on the hazards and preventative
measures/actions to be taken while using it.
Do not use the product for any purpose not listed above. It
is not to be used for professional tree services. The product
is not to be used by children or by persons not wearing
adequate personal protective equipment and clothing.
WARNING
When using the product, the safety rules must be
followed. For your own safety and that of bystanders,
you must read and fully understand these instructions
before operating the product. You should attend
a professionally organised course on the use and
maintenance of chainsaws, preventative actions and first
aid. Please keep these instructions safe for later use.
WARNING
Chainsaws are potentially dangerous tools. Accidents
involving the use of chainsaws often result in loss of
limbs or death. It is not just the product that is the hazard.
Falling branches, toppling trees, rolling logs can all kill.
Diseased or rotting timber poses additional hazards.
You should assess your capability of completing the task
safely. If there is any doubt, leave it to a professional
tree surgeon.
GENERAL SAFETY WARNINGS
WARNING
Read all safety warnings and all instructions. Failure
to follow the warnings and instructions may result in
electric shock, fire and/or serious injury.
Save all warnings and instructions for future reference.
The term “power tool” in the warnings refers to your mains-
operated (corded) power tool or battery-operated (cordless)
power tool.
WORK AREA SAFETY
■Keep work area clean and well lit. Cluttered or dark
areas invite accidents.
■Do not operate power tools in explosive
atmospheres, such as in the presence of flammable
liquids, gases or dust. Power tools create sparks
which may ignite the dust or fumes.
■Keep children and bystanders away while operating
a power tool. Distractions can cause you to lose
control.
ELECTRICAL SAFETY
■Power tool plugs must match the outlet. Never
modify the plug in any way. Do not use any adapter
plugs with earthed (grounded) power tools.
Unmodified plugs and matching outlets will reduce risk
of electric shock.
■Avoid body contact with earthed or grounded
surfaces, such as pipes, radiators, ranges and
refrigerators. There is an increased risk of electric
shock if your body is earthed or grounded.
■Do not expose power tools to rain or wet conditions.
Water entering a power tool will increase the risk of
electric shock.
■Do not abuse the cord. Never use the cord for
carrying, pulling or unplugging the power tool.
Keep cord away from heat, oil, sharp edges or
moving parts. Damaged or entangled cords increase
the risk of electric shock.
■When operating a power tool outdoors, use an
extension cord suitable for outdoor use. Use of a
cord suitable for outdoor use reduces the risk of electric
shock.
■If operating a power tool in a damp location is
unavoidable, use a residual current device (RCD)
protected supply. Use of an RCD reduces the risk of
electric shock.
PERSONAL SAFETY
■Stay alert, watch what you are doing and use
common sense when operating a power tool. Do
not use a power tool while you are tired or under the
influence of drugs, alcohol or medication. A moment
of inattention while operating power tools may result in
serious personal injury.
■Use personal protective equipment. Always wear
eye protection. Protective equipment such as dust
mask, non-skid safety shoes, hard hat, or hearing
protection used for appropriate conditions will reduce
personal injuries.
■Prevent unintentional starting. Ensure the switch
is in the off-position before connecting to power
source and/or battery pack, picking up or carrying
the tool. Carrying power tools with your finger on the
switch or energising power tools that have the switch
on invites accidents.
■Remove any adjusting key or wrench before turning
the power tool on. A wrench or a key left attached to
a rotating part of the power tool may result in personal
injury.
■Do not overreach. Keep proper footing and balance
at all times. This enables better control of the power
tool in unexpected situations.
■Dress properly. Do not wear loose clothing or
jewellery. Keep your hair, clothing and gloves away
from moving parts. Loose clothes, jewellery or long
hair can be caught in moving parts.

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■If devices are provided for the connection of dust
extraction and collection facilities, ensure these are
connected and properly used. Use of dust collection
can reduce dust-related hazards.
POWER TOOL USE AND CARE
■Do not force the power tool. Use the correct power
tool for your application. The correct power tool will
do the job better and safer at the rate for which it was
designed.
■Do not use the power tool if the switch does not turn
it on and off. Any power tool that cannot be controlled
with the switch is dangerous and must be repaired.
■Disconnect the plug from the power source and/or
the battery pack from the power tool before making
any adjustments, changing accessories, or storing
power tools. Such preventive safety measures reduce
the risk of starting the power tool accidentally.
■Store idle power tools out of the reach of children
and do not allow persons unfamiliar with the power
tool or these instructions to operate the power tool.
Power tools are dangerous in the hands of untrained
users.
■Maintain power tools. Check for misalignment or
binding of moving parts, breakage of parts and any
other condition that may affect the power tool’s
operation. If damaged, have the power tool repaired
before use. Many accidents are caused by poorly
maintained power tools.
■Keep cutting tools sharp and clean. Properly
maintained cutting tools with sharp cutting edges are
less likely to bind and are easier to control.
■Use the power tool, accessories and tool bits etc.
in accordance with these instructions, taking into
account the working conditions and the work to
be performed. Use of the power tool for operations
different from those intended could result in a
hazardous situation.
BATTERY TOOL USE AND CARE
■Recharge only with the charger specified by the
manufacturer. A charger that is suitable for one type
of battery pack may create a risk of fire when used with
another battery pack.
■Use power tools only with specifically designated
battery packs. Use of any other battery packs may
create a risk of injury and fire.
■When battery pack is not in use, keep it away from
other metal objects, like paper clips, coins, keys,
nails, screws or other small metal objects, that can
make a connection from one terminal to another.
Shorting the battery terminals together may cause
burns or a fire.
■Under abusive conditions, liquid may be ejected
from the battery; avoid contact. If contact
accidentally occurs, flush with water. If liquid
contacts eyes, additionally seek medical help.
Liquid ejected from the battery may cause irritation or
burns.
SERVICE
■Have your power tool serviced by a qualified repair
person using only identical replacement parts.
This will ensure that the safety of the power tool is
maintained.
ADDITIONAL GENERAL SAFETY WARNINGS
■Some regions have regulations that restrict the use of
the product. Check with your local authority for advice.
■Never allow children or people unfamiliar with the
instructions to use the product. Local regulations may
restrict the age of the operator.
■Ensure before each use that all controls and safety
devices function correctly. Do not use the power tool if
the “off” switch does not stop the motor.
■Wear full eye and hearing protection, strong sturdy
gloves as well as head protection while operating the
product; use a face mask if operation is dusty.
■Do not wear loose fitting clothing, short trousers or
jewellery of any kind.
■Secure long hair so it is above shoulder level to prevent
entanglement in moving parts.
■Beware of thrown, flying or falling objects; keep all
bystanders, children, and animals at least 15 m away
from work area.
■Do not operate in poor lighting. The operator requires a
clear view of the work area to identify potential hazards.
■Use of hearing protection reduces the ability to hear
warnings (shouts or alarms). The operator must pay
extra attention to what is going on in the working area.
■Operating similar tools nearby increases both the risk
of hearing injury and the potential for other persons to
enter your working area.
■Keep firm footing and balance. Do not overreach.
Overreaching can result in loss of balance and can
increase the risk of kickback.
■Keep all parts of your body away from any moving part.
■Inspect the machine before each use. Check for correct
operation of all controls including the chain brake.
Check for loose fasteners, make sure all guards, and
handles are properly and securely attached. Replace
any damaged parts before use.
■Do not modify the machine in any way or use parts
and accessories which are not recommended by the
manufacturer.
WARNING
If the machine is dropped, suffers heavy impact or begins
to vibrate abnormally, immediately stop the machine and
inspect for damage or identify the cause of the vibration.
Any damage should be properly repaired or replaced by
an authorized service centre.
CHAINSAW SAFETY WARNINGS
■Keep all parts of the body away from the saw chain
when the chainsaw is operating. Before you start
the chainsaw, make sure the saw chain is not

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contacting anything. A moment of inattention while
operating chainsaws may cause entanglement of your
clothing or body with the saw chain.
■Always hold the chainsaw with your right hand
on the rear handle and your left hand on the front
handle. Holding the chainsaw with a reversed hand
configuration increases the risk of personal injury and
should never be done.
■Hold the product by insulated gripping surfaces
only, because the saw chain may contact hidden
wiring. Saw chains contacting a "live" wire may make
exposed metal parts of the product "live" and could give
the operator an electric shock.
■Wear safety glasses and hearing protection. Further
protective equipment for head, hands, legs and feet
is recommended. Adequate protective clothing will
reduce personal injury by flying debris or accidental
contact with the saw chain.
■Do not operate a chainsaw in a tree. Operation of
a chainsaw while up in a tree may result in personal
injury.
■Always keep proper footing and operate the
chainsaw only when standing on fixed, secure and
level surface. Slippery or unstable surfaces such as
ladders may cause a loss of balance or control of the
chainsaw.
■When cutting a limb that is under tension be alert
for spring back. When the tension in the wood fibres is
released the spring loaded limb may strike the operator
and/or throw the chainsaw out of control.
■Use extreme caution when cutting brush and
saplings. The slender material may catch the saw
chain and be whipped toward you or pull you off
balance.
■Carry the chainsaw by the front handle with the
chainsaw switched off and away from your body.
When transporting or storing the chainsaw always
fit the guide bar cover. Proper handling of the
chainsaw will reduce the likelihood of accidental contact
with the moving saw chain.
■Follow instructions for lubricating, chain tensioning
and changing accessories. Improperly tensioned
or lubricated chain may either break or increase the
chance for kickback.
■Keep handles dry, clean, and free from oil and
grease. Greasy, oily handles are slippery causing loss
of control.
■Cut wood only. Do not use chainsaw for purposes
not intended. For example: do not use chainsaw
for cutting plastic, masonry or non-wood building
materials. Use of the chainsaw for operations different
than intended could result in a hazardous situation.
Personal protective equipment
Good quality, personal protective equipment as used
by professionals will help to reduce the risk of injury to
the operator. The following items should be used when
operating the product:
●Safety helmet
●Hearing protection
●Eye and face protection
●Gloves
●Leg protection (chaps)
●Chainsaw safety boots
●Chainsaw jackets for upper body protection
CAUSES AND OPERATOR PREVENTION OF KICBACK
See Fig. 1 - 2.
Kickback may occur when the nose or tip of the guide bar
touches an object, or when the wood closes in and pinches
the saw chain in the cut.
Tip contact in some cases may cause a sudden reverse
reaction, kicking the guide bar up and back towards the
operator.
Pinching the saw chain along the top of the guide bar may
push the guide bar rapidly back towards the operator.
Either of these reactions may cause you to lose control of
the saw which could result in serious personal injury. Do
not rely exclusively upon the safety devices built into your
saw. As a chainsaw user, you should take several steps to
keep your cutting jobs free from accident or injury.
Kickback is the result of tool misuse and/or incorrect
operating procedures or conditions and can be avoided by
taking proper precautions as given below:
■Maintain a firm grip, with thumbs and fingers
encircling the chainsaw handles, with both hands
on the saw and position your body and arm to allow
you to resist kickback forces. Kickback forces can
be controlled by the operator, if proper precautions are
taken. Do not let go of the chainsaw.
■Do not overreach and do not cut above shoulder
height. This helps prevent unintended tip contact and
enables better control of the chainsaw in unexpected
situations.
■Only use replacement bars and chains specified
by the manufacturer. Incorrect replacement bars and
chains may cause chain breakage and/or kickback.
■Follow the manufacturer's sharpening and
maintenance instructions for the saw chain.
Decreasing the depth gauge height can lead to
increased kickback.
ADDITIONAL CHAINSAW SAFETY WARNINGS
■It is recommended to cut logs on a saw-horse or cradle
when operating the product the first time.
■Ensure all guards, handles and spiked bumper are
properly fitted and are in good condition.
■Persons using this chainsaw should be in good health.
The chainsaw is a heavy unit so the operator requires
to be physically fit. The operator should be alert, have
good vision, mobility, balance and manual dexterity. If
there is any doubt, do not operate the chainsaw.
■Do not start using the product until you have a clear
work area, secure footing, and a planned retreat path
away from the falling tree.
■Beware of the emission of lubricant mist and saw dust.
Wear a mask or respirator if required.
■Do not cut vines and/or small undergrowth (less than
75 mm in diameter).

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■Always hold the chainsaw with both hands when
operating the saw. Use a firm grip with thumbs and
fingers encircling the chainsaw handles. Right hand
must be on the rear handle and left hand on the front
handle.
■Before starting the tool, make sure the saw chain is not
contacting any object.
■Do not modify your tool in any way or use it to power
any attachments or devices not recommended by the
manufacturer for your saw.
■There should be a first-aid kit containing large
wound dressings and a means to summon attention
(e.g., whistle) close to the operator. A larger more
comprehensive kit should be reasonably nearby.
■The operator may be tempted to remove the helmet if
there is no danger of falling objects in the work area, but
remember the helmet, particularly with the mesh visor,
can help reduce the potential for injury to the face and
head if kickback occurs.
■An incorrectly tensioned chain can jump off the guide
bar and could result in serious injury or fatality. The
length of chain depends on the temperature of the
chain and chain wear. Check the tension frequently.
■You should get used to your new chainsaw by making
simple cuts on securely supported wood. Do this
whenever you have not operated the saw for some
time.
■To reduce the risk of injury associated with contacting
moving parts, always stop the motor, apply chain brake,
remove the battery pack and make sure all moving
parts have come to a stop before:
–cleaning or clearing a blockage
–leaving the product unattended
–installing or removing attachments
–checking, maintenance or working on the machine
■The size of the work area depends on the job being
performed as well as the size of the tree or work piece
involved. For example, felling a tree requires a larger
work area than making other cuts, i.e., bucking cuts,
etc. The operator needs to be aware and in control of
everything happening in this work area.
■Do not cut with your body in line with the guide bar
and chain. If you do experience kickback this will help
prevent the chain coming into contact with your head
or body.
■Do not use a back and forward sawing motion, let the
chain do the work, keep the chain sharp and don’t try to
push the chain through the cut.
■Do not put pressure on the saw at the end of the cut.
Be ready to take on the weight of the saw as it cuts free
from the wood. Failure to do so could result in possible
serious personal injury.
■Do not stop the saw in the middle of a cutting operation.
Keep the saw running until it is already removed from
the cut.
PUSH AND PULL
See Fig. 3.
The reaction force is always opposite to the direction the
chain is moving. Thus, the operator must be ready to
control the tendency for the product to pull away (forward
motion) when cutting on the bottom edge of the bar and the
push backwards (towards the operator) when cutting along
the top edge.
SAW JAMMED IN THE CUT
Stop the chainsaw and make it safe. Do not try to force the
chain and bar out of the cut as this is likely to break the
chain which may swing back and strike the operator. This
situation normally occurs because the wood is incorrectly
supported and forcing the cut to close under compression
thereby pinching the blade. If adjusting the support does
not release the bar and chain, use wooden wedges or a
lever to open the cut and release the saw. Never try to start
the chainsaw when the guide bar is already in a cut or kerf.
Fig 1
Fig 2
Fig 3

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RESIDUAL RISKS
Even when the product is used as prescribed, it is still
impossible to completely eliminate certain residual risk
factors. The following hazards may arise in use and the
operator should pay special attention to avoid the following:
■Injury caused by vibration. Always use the right tool for
the job, use designated handles and restrict working
time and exposure.
■Exposure to noise can cause hearing injury. Wear ear
protection and limit exposure
■Contact with exposed saw teeth of the chain (cutting
hazards).
■Unforeseen, abrupt movement or kickback of the guide
bar (cutting hazards).
■Parts ejected from the saw chain (cutting/injection
hazards).
■Thrown out pieces of the work piece (wood chips,
splinters)
■Inhalation of saw dust and particles.
■Skin contact with lubricant/oil.
RISK REDUCTION
It has been reported that vibrations from hand-held tools
may contribute to a condition called Raynaud’s Syndrome
in certain individuals. Symptoms may include tingling,
numbness and blanching of the fingers, usually apparent
upon exposure to cold. Hereditary factors, exposure to
cold and dampness, diet, smoking and work practices
are all thought to contribute to the development of these
symptoms. There are measures that can be taken by the
operator to possibly reduce the effects of vibration:
■Keep your body warm in cold weather. When operating
the unit wear gloves to keep the hands and wrists
warm. It is reported that cold weather is a major factor
contributing to Raynaud’s Syndrome.
■After each period of operation, exercise to increase
blood circulation.
■Take frequent work breaks. Limit the amount of
exposure per day.
■Protective gloves available from professional chainsaw
retailers are designed specifically for chainsaw use
which give protection, good grip and also reduce the
effect of handle vibration.
If you experience any of the symptoms of this condition,
immediately discontinue use and see your doctor about
these symptoms.
WARNING
Injuries may be caused, or aggravated, by prolonged
use of a tool. When using any tool for prolonged periods,
ensure you take regular breaks.
SAFETY DEVICES
LOW KICKBACK SAW CHAIN
A low-kickback saw chain helps to reduce the possibility of
a kickback event.
The rakers (depth gauges) ahead of each cutter can
minimise the force of a kickback reaction by preventing the
cutters from digging in too deeply. Only use replacement
guide bar and chain combinations recommended by the
manufacturer.
As saw chains are sharpened, they lose some the low
kickback qualities and extra caution is required. For your
safety, replace saw chains when cutting performance
decreases.
GUIDE BARS
Generally, guide bars with small radius tips have somewhat
lower potential for kickback. Only use replacement
guide bar and chain combinations recommended by the
manufacturer. The use of unrecommended guide bars
increase the risk of loss of control during sawing.
KNOW YOUR PRODUCT
See Fig. 4.
The safe use of the product requires an understanding of
the information on the product and in this operator's manual,
as well as a knowledge of the project you are attempting to
do. Before using the product, familiarise yourself with all
operating features and safety rules
ASSEMBLY
UNPACKING
The product has been shipped completely assembled.
■Carefully remove the product and any accessories from
the box. Make sure that all items listed in the packing
list are included.
Fig 4

6
WARNING
Do not use the product if it is not completely assembled
or if any parts appear to be missing or damaged. Use of
a product that is not properly and completely assembled
could result in serious personal injury.
■Inspect the product carefully to make sure no breakage
or damage occurred during shipping.
■Do not discard the packing material until you have
carefully inspected and satisfactorily operated the
product.
PACKING LIST
■Chainsaw with Scabbard
■Hex Key
■Operator's Manual
WARNING
If any parts are damaged or missing do not operate the
product until the parts are replaced. Use of this product
with damaged or missing parts could result in serious
personal injury.
WARNING
Do not attempt to modify the product or create
accessories not recommended for use. Any such
alteration or modification is misuse and could result
in a hazardous condition leading to possible serious
personal injury.
WARNING
To prevent accidental starting that could cause serious
personal injury, always remove the battery pack from the
product when assembling parts.
OPERATION
DANGER
Never cut near power lines, electric cords, or other
electric sources. If bar and chain jams on any electrical
cord or line, do not touch the bar or chain! they become
electrically live and very dangerous. Continue to hold
the chainsaw by the insulated rear handle or lay it down
and away from you in a safe manner. Disconnect the
electrical service to the damaged line or cord before
attempting to free the bar and chain from the line or
cord. Contact with the bar, chain, other conductive parts
of the chainsaw, or live electric cords or lines will result
in death by electrocution, electric shock, or serious
personal injury.
WARNING
Do not allow familiarity with this product to make you
careless. Remember that a careless fraction of a second
is sufficient to inflict serious injury
WARNING
Always wear eye protection with side shields, along
with hearing and head protection. Failure to do so could
result in objects being thrown into your eyes resulting in
possible serious injury..
WARNING
Do not use any attachments or accessories not
recommended by the manufacturer of this product. The
use of attachments or accessories not recommended
can result in serious personal injury.
WARNING
Never fell a tree or cut a log or limb that has a diameter
greater than the length of the guide bar. Only properly
trained professionals should perform these cuts.
Performing these types of cuts can cause an accident
and result in death or serious personal injury.
CAUTION
Before each use, inspect the entire product for
damaged, missing, or loose parts such as screws, nuts,
bolts, and caps. Tighten securely all fasteners and
caps and do not operate the product until all missing or
damaged parts are replaced. Please contact customer
service or an authorised service centre for assistance.
This product will accept Ryobi One+ 18 V lithium-ion battery
packs and Ryobi One+ 18 V nickel-cadmium battery packs.
For complete charging instructions, refer to the Operator's
Manual for your Ryobi One+ battery pack and charger
models.
WARNING
Always remove battery pack from the product when you
are assembling parts, making adjustments, cleaning,
carrying, transporting or when not in use. Removing
battery pack will prevent accidental starting that could
cause serious personal injury.
NOTE: To avoid serious personal injury, always remove
the battery pack and keep hands clear of the lock-out
button when carrying or transporting the product.
INSTALLING THE BATTERY PACK
See Fig.5.
■Place the battery pack in your chainsaw. Align raised
rib on battery pack with groove in chainsaw's battery
port.

7
■Make sure the latches on each side of the battery pack
snap in place and that battery pack is secured in the
chainsaw before beginning the operation.
REMOVING THE BATTERY PACK
See Fig.5.
Locate latches on side of battery pack and depress both
sides to release the battery pack from the chainsaw.
CAUTION
When placing battery pack in your chainsaw, be sure the
raised rib on the battery pack aligns with groove in the
product's battery port and latches snap in place properly.
Improper assembly of battery pack can cause damage to
internal components.
CAUTION
Remove battery pack from unit. Fill oil tank with Ryobi
Bar and Chain Lubricant before starting the chainsaw.
Failure to lubricate the chain will cause damage to the
bar and chain.
CHAIN LUBRICATION SYSTEM
See Fig.6.
■Use Ryobi Bar and Chain Lubricant. It is formulated to
perform over a wide temperature range with no dilution
required.
NOTE: Do not use dirty, used or otherwise contaminated
lubricants. Damage may occur to the bar or chain.
■Carefully pour the bar and chain lubricant into the tank.
■Check and fill the oil tank when battery is recharged,
or as needed.
■Depress the oil tank cap once to pump the lubricant to
the chain before starting the saw. This allows the oil to
continually flow for 1.5-2 minutes.
■To keep the chain lubricated while cutting, depress
the oil tank cap once every few minutes.
NOTE: It is normal for lubricant to seep from the saw
when not in use. To prevent seepage, empty the oil tank
after each use. When storing the unit for a long period of
time (three months or longer) be sure the chain is lightly
lubricated; this will prevent rust on the chain and bar
sprocket.
STARTING THE CHAINSAW
See Fig.7.
WARNING
Keep body to the left of the chain line. Never straddle the
saw or chain, or lean over past the chain line.
■Place the chainsaw on a flat bare surface and make
sure no objects or obstructions are in the immediate
vicinity which could come in contact with the bar and
chain.
■Press and hold the lock-out button. This makes the
switch trigger operational.
■Press and hold the switch trigger, release the lock-out
button and continue to squeeze the switch trigger for
continued operation.
STOPPING THE CHAINSAW
See Fig.7.
■Release the switch trigger to stop the chainsaw.
■Upon release of the switch trigger, the lock-out button
will be automatically reset to the lock position.
Fig 5
Fig 6

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PREPARATION FOR CUTTING
PROPER GRIP ON HANDLES
See Fig.8-10.
Refer to Important Safety Instructions in this manual for
appropriate safety equipment.
■Wear non-slip gloves for maximum grip and protection.
■Hold the saw firmly with both hands. Always keep your
left hand on the front handle and your right hand on
the rear handle so that your body is to the left of the
chain line.
WARNING
Never use a left-handed (cross-handed) grip, or any
stance which would place your body or arm across the
chain line.
■Maintain a proper grip on the saw whenever the unit is
running. The fingers should encircle the handle and the
thumb should wrap under the handlebar. This grip is
least likely to be broken (by a kickback or other sudden
reaction of the saw). Any grip in which the thumb and
fingers are on the same side of the handle, is danger-
ous because a slight kick of the saw can cause loss
of control.
WARNING
Do not operate the switch trigger with your left hand
and hold the front handle with your right hand. Never
allow any part of your body to be in the chain line while
operating a saw. Improper operation of the chainsaw
could result in serious personal injury.
Fig 8
Fig 9
Fig 10
Fig 7

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PROPER CUTTING STANCE
See Fig.11.
WARNING
Always use the proper cutting stance described in this
section. Never kneel when using the chainsaw except
when felling a tree as shown in figure 15. Kneeling could
result in loss of stability and control of the saw resulting
in serious personal injury.
■Weight should be balanced with both feet on solid
ground.
■Keep left arm with elbow locked in a "straight arm"
position to withstand any kickback force.
■Your body should always be to the left of the chain line.
■Thumb should be on underside of handlebar.
BASIC CUTTING PROCEDURE
Practice cutting a few small logs using the following
technique to get the "feel" of using the saw before you
begin a major sawing operation.
■Support log on a saw horse or cradle.
■Take the proper stance in front of the wood with the
saw off.
■Squeeze the switch trigger and let the chain accelerate
to full speed before entering the cut.
■Begin cutting with the saw against the log.
■Keep the unit running the entire time you are cutting,
maintain a steady speed.
■Allow the chain to cut for you; exert only light downward
pressure. If you force the cut, damage to the bar, chain,
or unit can result.
■Release the switch trigger as soon as the cut is
completed, allowing the chain to stop. If you run the
saw without a cutting load, unnecessary wear can
occur to the chain, bar, and unit.
■Do not put pressure on the saw at the end of cut.
WORK AREA PRECAUTIONS
■Cut only wood or materials made from wood, no sheet
metal, no plastics, no masonry, no non-wood building
materials.
■Never allow children to operate the saw. Do not allow
any person who has not read this Operator's Manual or
received adequate instructions on the safe and proper
use of the product to operate the product.
■Keep everyone - helpers, bystanders, children, and
animals - a safe distance from the cutting area. During
felling operations, the safe distance should be a least
twice the height of the largest trees in the felling area.
During bucking operations, keep a minimum distance of
15 m between workers.
■Always cut with both feet on solid ground to prevent
being pulled off balance.
■Do not cut above chest height, as a saw held higher is
difficult to control against kickback forces.
■Do not fell trees near electrical wires or buildings.
Leave this operation for professionals.
■Cut only when visibility and light are adequate for you
to see clearly.
FELLING TREES
See Fig.12-15.
WARNING
Do not fell trees during periods of high wind or heavy
precipitation. Wait until the hazardous weather has
ended.
WARNING
Closely check for broken or dead branches that could
fall while cutting and do not cut near buildings or
electrical wires if you do not know the direction of tree
fall. Do not cut at night or during bad weather conditions,
such as rain, snow, or strong winds, which can reduce
visibility and control of the chainsaw. If the tree you are
felling makes contact with any utility line, you should
discontinue use of the chainsaw and immediately notify
the utility company. Failure to follow these instructions
could result in death or serious personal injury.
When felling a tree, it is important that you follow these
warnings and instructions to prevent possible serious
injury.
■Do not cut down trees having an extreme lean or large
trees with rotten limbs, loose bark, or hollow trunks.
Have these trees pushed or dragged down with heavy
equipment, then cut them up.
■Do not cut trees near electrical wires or buildings.
■Check the tree for damaged or dead branches that
could fall and hit you during felling.
■Periodically glance at the top of the tree during the
backcut to assure the tree is going to fall in the desired
direction.
■If the tree starts to fall in the wrong direction, or if the
saw gets caught or hung up during the fall, leave the
saw and save yourself!
■Felling a tree - When bucking and felling operations are
being performed by two or more persons, at the same
time, the felling operation should be separated from
the bucking operation by a distance of at least twice
the height of the tree being felled. Trees should not be
felled in a manner that would endanger any person,
Fig 11

10
strike any utility line or cause any property damage.
If the tree does make contact with any utility line, the
utility company should be notified immediately.
■Before any cuts are started, an escape path should
be planned and cleared as necessary before cuts are
started. The escape path should extend back and
diagonally to the rear of the expected line of fall. See
Fig.12.
■Before felling is started, consider the force and direction
of the wind, the lean and balance of the tree, and the
location of large limbs. These things influence the
direction in which the tree will fall. Do not try to fell a
tree along a line different from its natural line of fall.
■The chainsaw operator should keep on the uphill side
of the terrain as the tree is likely to roll or slide downhill
after it is felled.
■Remove dirt, stones, loose bark, nails, staples, and wire
from the tree where felling cuts are to be made.
■Notched Undercut. Cut a notch about 1/3 the diameter
of the tree, perpendicular to the direction of fall. Make
the cuts of the notch so they intersect at a right angle to
the line of fall. This notch should be cleaned out to leave
a straight line. To keep the weight of the wood off the
saw, always make the lower cut of the notch before the
upper cut. See Fig.13.
■Felling Backcut. The backcut is always made level and
horizontal, and at a minimum of 50 mm (2 in) above the
horizontal cut of the notch. See Fig.13-14.
■Never cut through to the notch. Always leave a band of
wood between the notch and backcut (approximately
50 mm (2 in). or 1/10 the diameter of the tree). This is
called "hinge" or "hingewood." It controls the fall of the
tree and prevents slipping or twisting or shoot-back of
the tree off the stump. See Fig.13-14.
■On large diameter trees, stop the back cut before it is
deep enough for the tree to either fall or settle back on
the stump. Then insert soft wooden or plastic wedges
into the cut so they do not touch the chain. The wedges
can be driven in, little by little, to help jack the tree over.
See Fig.15.
■As tree starts to fall, stop the chainsaw and put it down
immediately. Retreat along the cleared path, but watch
the action in case something falls your way. Be alert
for overhead limbs or branches that may fall and watch
your footing.
WARNING
Never cut through to the notch when making a backcut.
The hinge controls the fall of the tree, this is the section
of wood between the notch and backcut.
1
3
2
50 mm (2 in)
50 mm (2 in)
REMOVING BUTTRESS ROOTS
See Fig.16.
A buttress root is a large root extending from the trunk of
the tree above the ground. Remove large buttress roots
prior to felling. Make the horizontal cut into the buttress
Fig 13
Fig 14
Fig 15
Fig 12

11
first, followed by the vertical cut. Remove the resulting
loose section from the work area. Follow the correct tree
felling procedure as staged in Felling Trees after you have
removed the large buttress roots.
BUCKING
See Fig.17-20.
Bucking is the term used for cutting a fallen tree to the
desired log length.
■Always make sure your footing is secure and your
weight is distributed evenly on both feet.
■Cut only one log at a time.
■Support small logs on a saw horse or another log while
bucking.
■Keep a clear cutting area. Make sure that no objects
can contact the guide bar nose and chain during cutting,
this can cause kickback. Refer to Kickback section in
this manual.
■When bucking on a slope, always stand on the uphill
side of the log. To maintain complete control of the
chainsaw when cutting through the log, release the
cutting pressure near the end of the cut without relaxing
your grip on the chainsaw handles. Do not let the chain
contact the ground. After completing the cut, wait for
the saw chain to stop before you move the chainsaw.
Always stop the motor before moving from tree to tree.
BUCKING LOGS UNDER STRESS
See Fig.19-20.
When the log is supported along its entire length, it should
be cut from the top or overbucking.
When the log is supported on one end, cut 1/3 the diameter
from the underside or underbucking. Then make the
finishing cut by overbucking to meet the first cut.
As the log is being cut, it will tend to bend. The saw can
become pinched or hung in the log if you make the first cut
deeper than 1/3 of the diameter of the log.
Give special attention to logs under stress to prevent the
bar and chain from pinching.
When bucking on a slope, always stand on the uphill side
of the log as shown in figure 18. When "cutting through,"
to maintain complete control of the chainsaw, release the
cutting pressure near the end of the cut without relaxing
your grip on the chainsaw handles. Do not let the chain
contact the ground. After completing the cut, wait for the
saw chain to stop before you move the chainsaw. Always
stop the motor before moving from tree to tree.
Fig 16
Fig 17
Fig 18

12
TYPES OF CUTTING USED
See Fig.20.
OVERBUCKING
Begin on the top side of the log with the bottom of the saw
against the log; exert light pressure downward. Note that
the saw will tend to pull away from you.
UNDERBUCKING
Begin on the under side of the log with the top of the
saw against the log; exert light pressure upward. During
underbucking, the saw will tend to push back at you.
Be prepared for this reaction and hold the saw firmly to
maintain control.
LIMBING A TREE
See Fig.21.
■Work slowly, keeping both hands on the saw with a firm
grip. Maintain secure footing and balance.
■Keep the tree between you and the chain while limbing.
■Do not cut from a ladder. This is extremely dangerous.
Leave this operation for professionals.
■Do not cut above chest height. A saw held higher than
chest height is difficult to control against kickback.
WARNING
Never climb on a tree to limb or prune. Do not stand
on ladders, platforms, rooftops, a log, or in any position
which can cause you to lose your balance or control of
the saw and cause death or serious personal injury.
Fig 21
Fig 20Fig 19

13
SPRINGPOLES
See Fig.22.
A springpole is any log, branch, rooted stump, or sapling
which is bent under tension by other wood so that it springs
back if the wood holding it is cut or removed. On a fallen
tree, a rooted stump has a high potential of springing back
to the upright position during the bucking cut to separate
the log from the stump. Watch out for springpoles, they are
dangerous.
WARNING
Springpoles are dangerous and could strike the operator,
causing the operator to lose control of the chainsaw.
This could result in severe or fatal injury to the operator.
WARNING
To avoid serious personal injury, always remove
the battery pack from the product when cleaning or
performing any maintenance.
WARNING
Always wear eye protection with side shields, along
with hearing and head protection. Failure to do so could
result in objects being thrown into your eyes resulting in
possible serious injury.
WARNING
When servicing, use only identical replacement parts.
Use of any other parts could create a hazard or cause
product damage.
CAUTION
Periodically inspect the entire product for damaged,
missing, or loose parts such as screws, nuts, bolts, and
caps. Tighten securely all fasteners and caps and do not
operate this product until all missing or damaged parts
are replaced. Please contact customer service or an
authorised service centre for assistance.
MAINTENANCE
Avoid using solvents when cleaning plastic parts. Most
plastics are susceptible to damage from various types of
commercial solvents and may be damaged by their use.
Use clean cloths to remove dirt, dust, oil, and grease.
WARNING
Do not at any time let brake fluids, gasoline, petroleum-
based products, penetrating oils, etc., come in contact
with plastic parts. Chemicals can damage, weaken or
destroy plastic which could result in serious personal
injury.
REPLACING BAR AND CHAIN
See Fig.23-26.
WARNING
Remove the battery pack from the chainsaw and make
sure the chain has stopped before you do any work on
the saw. Failure to do so may result in accidental starting
and possible serious injury.
WARNING
To avoid serious personal injury, read and understand all
the safety instructions in this section.
WARNING
Never touch or adjust the chain while the motor is
running. The saw chain is very sharp; always wear
protective gloves when performing maintenance to the
chain to avoid possible serious lacerations.
CAUTION
Always wear gloves when handling the bar and chain;
these components are sharp and may contain burrs.
■Remove the battery pack before you do any work on
the chainsaw.
■Remove the hex key from the storage area and use it to
remove the chain cover screw, washer and chain cover
from the chainsaw.
■Loosen the chain tension by turning the chain tensioning
screw counterclockwise. See Fig.25.
■Remove the bar and chain from mounting surface.
■Remove the old chain from the bar.
■Lay out the new saw chain in a loop and straighten any
kinks. The cutters should face in the direction of chain
rotation. If they face the opposite direction, turn the loop
over.
■Place the chain drive links into the bar groove. Position
the chain so there is a loop at the back of the bar. Hold
the chain in position on the bar and place the loop
Fig 22

14
around the sprocket of the chainsaw. Fit the bar flush
against the mounting surface so that the bar stud is in
the long slot of the bar.
WARNING
When placing the bar on the bar studs, ensure the chain
tensioning pin is in the chain tension pin hole. Failure
to properly place the chain tensioning pin in the chain
tension pin hole could cause the chain to come loose,
resulting in serious personal injury.
■Replace the chain cover, washer and chain cover
screw. Tighten the chain cover screw only by hand. The
bar must be free to move for tension adjustment.
■Remove all the slack from the chain by turning the chain
tensioning screw clockwise until the chain seats snugly
against the bar with the drive links in the bar groove.
■Lift the tip of the guide bar up to check for sag.
Release the tip of the guide bar and turn the chain
tensioning screw 1/2 turn clockwise. Repeat this
process until sag does not exist.
■Hold the tip of the guide bar up and tighten the chain
cover screw securely.
■Chain is correctly tensioned when there is no sag on the
underside of the guide bar, the chain is snug, but it can
be turned by hand without binding.
NOTE: If chain is too tight, it will not rotate. Loosen the
chain cover screw slightly and turn tension adjuster 1/4
turn counterclockwise. Lift the tip of the guide bar up and
retighten chain cover screw securely. Assure that the chain
will rotate without binding.
■Tighten the chain cover screw securely by 3 N.m torque.
■Place the hex key back into the storage area.
ADJUSTING THE CHAIN TENSION
See Fig.27-28.
WARNING
Never touch or adjust the chain while the motor is
running. The saw chain is very sharp. Always wear
protective gloves when performing maintenance on the
chain.
■Stop the motor before setting the chain tension. Make
sure the chain cover screw is loosened to finger tight,
turn the chain tensioner clockwise to tension the chain.
Refer to Replacing Bar and Chain section in this
manual for additional information.
Fig 24
Fig 25
Fig 26
Fig 23

15
■A cold chain is correctly tensioned when there is no
slack on the underside of the guide bar, the chain is
snug, but it can be turned by hand without binding.
■Chain must be re-tensioned whenever the flats on the
drive links hang out of the bar groove.
■During normal saw operation, the temperature of
the chain will increase. The drive links of a correctly
tensioned warm chain will hang approximately 1.27 mm
(.050 in.) out of the bar groove.
NOTE: New chain tends to stretch, check chain tension
frequently and tension as required.
CAUTION
Chain tensioned while warm, may be too tight upon
cooling. Check the "cold tension" before next use.
MAINTAINING THE GUIDE BAR
See Fig.29-30.
CAUTION
Make sure the chain has stopped and the battery pack
has been removed before you do any work on the saw.
Proper maintenance will maximize the useful life of the
guide bar.
Each day of use:
■Clean the bar and check for wear and damage.
Feathering or burring of the bar rails is a normal process
of bar wear, but such faults should be smoothed with a
file as soon as they occur.
Each week of use:
■Lubricate the socket at the end of the guide bar using a
grease syringe in the lubricating hole.
■Turn the guide bar and check that the lubrication holes
and chain groove are free from impurities.
A bar with any of the following faults should be
replaced immediately:
■Wear inside the bar rails that permits the chain to lay
over sideways
■Bent guide bar
■Cracked or broken rails
■Spread rails
MAINTENANCE SCHEDULE
Daily check
Bar lubrication Before each use
Chain tension Before each use
and frequently
Chain sharpness Before each use,
visual check
For damaged parts Before each use
For loose fasteners Before each use
INSPECT AND CLEAN:
Bar Before each use
Complete saw After each use
Fig 27
Fig 28
Fig 29
Fig 30

16
TRANSPORTATION AND STORAGE
See Fig.31.
■Stop the product, remove the battery pack and allow
the product to cool down before storing or transporting.
■Do not store or transport the chainsaw when it is
running. The chainsaw should always be idle before
storing or transporting.
■Always place the guide bar scabbard on the bar and
chain before storing or transporting the chainsaw. Use
caution to avoid the sharp teeth of the chain.
■Clean the chainsaw thoroughly before storing. Store the
chainsaw indoors, in a dry place that is locked and/or
inaccessible to children.
■Keep away from corrosive agents such as garden
chemicals and de-icing salts
SYMBOLS ON THE PRODUCT
Safety alert
Read and understand all instructions
before operating the product, follow all
warnings and safety instructions.
Wear eye, ear and head protection.
Wear non-slip safety footwear when
using the product.
Wear non-slip, heavy duty gloves.
Beware of chainsaw kickback and
avoid contact with bar tip.
Hold and operate the product properly
with both hands.
Do not operate the product using only
one hand.
Do not expose to rain or damp
condition.
Remove the battery pack before
starting any work on the product.
Waste electrical products should not
be disposed of with household waste.
Please recycle where facilities exist.
Check with your local authority or
retailer for recycling advice.
SYMBOLS IN THIS MANUAL
The following signal words and meanings are intended to
explain the levels of risk associated with the product.
DANGER
Indicates an imminently hazardous situation, which, if
not avoided, will result in death or serious injury.
WARNING
Indicates a potentially hazardous situation, which, if not
avoided, could result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation, which, if not
avoided, may result in minor or moderate injury.
CAUTION
Without safety alert symbol
Indicates a situation that may result in property damage.
Fig 31

TROUBLESHOOTING
Problem Possible cause Solution
Bar and chain
running hot and
smoking.
Check chain tension
for over tight condition
Tension chain.
Refer to Chain
Tension section in
this manual.
Chain oil tank empty. Check oil tank.
Motor runs, but
chain is not
rotating.
Chain tension too
tight.
Retension chain,
Refer to Chain
Tension section in
this manual.
Check guide bar and
chain assembly.
Refer to
Assembling the
Bar and Chain
section in this
manual.
Check guide bar and
chain for damage.
Inspect guide
bar and chain for
damage.
PRODUCT SPECIFICATIONS
Cordless Chainsaw
Model OCS1825
Rated voltage DC 18 Volts
Bar length 25.4 cm
Chain oil tank capacity 120 ml
Weight (without battery pack, with
guide bar, chain and empty tank)
2.6 kg
Usable cutting length 16.0 cm
Chain speed 3.6 m/s
BATTERY AND CHARGER
Compatible charger
(not included) BCL14181H, BCL14183H
Compatible battery
packs (not included)
BPL-1815, BPL-1820, RB18L13,
RB18L15, RB18L25, RB18L26, RB18L40,
RB18L50
REPLACEMENT PART (BAR AND CHAIN)
Manufacturer Tri-link
Chain CL14340XPB
Bar M1431040- 1041HL
Chain must be fitted with bar from the same manufacturer
according to above combinations.

960994048-01
Techtronic Industries (Australia) Pty. Ltd.
31 Gilby Road,
Mt Waverley, VIC 3149, Australia
Techtronic Industries New Zealand Ltd.
2 Landing Drive, Auckland Airport,
Mangere, New Zealand 2022