OPERATOR’S MANUAL
PCN3840 - RY74005D - 406 mm (16 in.) 38cc Chainsaw
PCN4545 - RY74007D - 457 mm (18 in.) 45cc Chainsaw
Your new chainsaw has been engineered and manufactured to Ryobi’s high standard for dependability, ease of operation,
and operator safety. Properly cared for, it will give you years of rugged, trouble-free performance.
WARNING: To reduce the risk of injury, the user must read and understand the operator’s manual before
using this product.
Thank you for buying a Ryobi chainsaw.
SAVETHIS MANUAL FOR FUTURE REFERENCE
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GENERAL SAFETY RULES
3. Make sure that the area in which you are cutting is
WARNING:
free from obstructions. DO NOT let the nose of the
guide bar contact a log, branch, fence, or any other
obstruction that could be hit while you are operating
the saw.
The warnings, labels, and instructions found in this
section of the operator’s manual are for your safety.
Failure to follow all instructions may result in serious
personal injury.
4. Cut at high engine speeds. Always cut with the
engine running at full speed. Fully squeeze the
throttle trigger and maintain a steady cutting speed.
Safe operation of this tool requires that you read and
understand this operator’s manual and all labels affixed to
the tool. Safety is a combination of using common sense,
staying alert, and knowing how your saw works.
5. Do not overreach or cut above chest height.
6. Follow the manufacturer’s sharpening and
maintenance instructions for the saw chain.
READ ALL INSTRUCTIONS
7. Use only replacement bars and chains specified by
■ KNOW YOUR TOOL. Read the operator’s manual
carefully. Learn the saw’s applications and limitations as
well as the specific potential hazards related to this tool.
the manufacturer or the equivalent.
■ DO NOT OPERATE A CHAINSAWWITH ONE HAND.
Serious injury to the operator, helpers and/or
bystanders may result from one-handed operation.
A chainsaw is intended for two-handed use.
■ CHAINSAWS are designed for cutting wood only.
■ KICK-BACK MAY OCCURWHENTHE NOSE ORTIP
OFTHE 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 lightning-fast
reverse reaction kicking the guide bar up and back
toward the operator.Pinching the saw chain along the
top of the guide bar may push the guide bar rapidly back
toward 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.
■ DO NOT OPERATE A CHAINSAWWHENYOU ARE
FATIGUED. Never operate a chainsaw when you are
tired or under the influence of medication, drugs, or
alcohol.
■ USE SAFETY FOOTWEAR. Wear snug-fitting clothing,
protective gloves, and eye, hearing, and head
protection devices.
■ DO NOT STAND ON ANY UNSTABLE SURFACE while
using your chainsaw: that includes ladders, scaffolds,
trees, etc.
■ USE CAUTIONWHEN HANDLING FUEL. Move the
chainsaw at least 50 feet (15 m) from the refuelling
point before starting the engine.
1. With a basic understanding of kick-back, you can
reduce or eliminate the element of surprise. Sudden
surprise contributes to accidents.
■ DO NOT ALLOW OTHER PERSONS to be near the
chainsaw when starting or cutting with the chainsaw.
Keep bystanders and animals out of the work area.
2. Keep a good firm grip on the saw with both hands
when the engine is running. Place your right hand on
the rear handle and your left hand on the front handle
with your thumbs and fingers encircling the chainsaw
handles. A firm grip together with a stiff left arm
will help you maintain control of the saw if
kick-back occurs.
■ DO NOT START CUTTING until you have a clear work
area, secure footing, and a planned retreat path from
the falling tree.
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GENERAL SAFETY RULES
■ OPERATETHE CHAINSAW ONLY in well-ventilated
■ KEEP ALL PARTS OFYOUR BODY away from the saw
areas.
chain when the engine is running.
■ DO NOT OPERATE A CHAINSAW IN ATREE unless
■ ALWAYS CARRYTHE CHAINSAWWITHTHE ENGINE
STOPPED ANDTHE BRAKE ENGAGED, the guide bar
and saw chain to the rear, and the silencer away from
your body. When transporting the chainsaw, use the
appropriate guide bar scabbard.
you have been specifically trained to do so.
■ ALL CHAINSAW SERVICE, other than the items listed
in the instruction manual and all maintenance, should
be performed by competent chainsaw service personnel.
(For example, if improper tools are used to remove the
flywheel or if an improper tool is used to hold the
flywheel in order to remove the clutch, structural
damage to the flywheel could occur and subsequently
cause the flywheel to burst.)
■ DO NOT OPERATE A CHAINSAWTHAT IS DAMAGED,
improperly adjusted, or not completely and securely
assembled. Be sure that the saw chain stops moving
when the throttle control trigger is released.
■ TURN OFFTHE ENGINE before putting the chainsaw
down.DO NOT leave the engine running unattended.
As an additional safety precaution, apply the chain brake
before putting down the saw.
■ KEEPSAFE-T-TIP®ANTI-KICK-BACKNOSEGUARD
properly mounted on the guide bar to prevent rotational
kick-back.
■ FOLLOWTHESHARPENINGandmaintenance
■ USE EXTREME CAUTION when cutting small-size
brush and saplings because slender material may catch
the saw chain and be whipped toward you or pull you
off balance.
instructions for the saw chain.
■ USEONLYTHEREPLACEMENTGUIDEBARSandlow
kick-back chains specified for your saw.
■ WHEN CUTTING A LIMB under tension, be alert for
spring-back so that you will not be struck when the
tension in the wood fibres is released.
■ DO NOT adapt your powerhead to a bow guide or use
it to power any attachments or devices not listed for
your saw.
■ KEEPTHE HANDLES dry, clean, and free of oil or
■ SAVE THESE INSTRUCTIONS. Refer to them
frequently and use to instruct other users. If you lend
someone this tool, lend them these instructions also.
fuel mixture.
SPECIFIC SAFETY RULES
■ ALWAYS HOLDTHE CHAINSAWWITH BOTH HANDS
when the engine is running. Use a firm grip with thumbs
and fingers encircling the chainsaw handles.
WARNING:
The warnings, labels, and instructions found in this
section of the operator’s manual are for your safety.
Failure to follow all instructions may result in serious
personal injury.
■ NEVER LET ANYONE USE YOUR CHAINSAW who
has not received adequate instructions in its proper use.
This applies to rentals as well as privately owned saws.
■ BEFORE YOU START THE ENGINE, make sure the
GENERAL PRECAUTIONS
saw chain is not contacting any object.
■ DO NOT CUT VINES and/or small undergrowth (less
■ OPERATE THE CHAINSAW only in well ventilated
than 76 mm (3 in.) in diameter).
areas.
■ SILENCER SURFACES ARE VERY HOT during and
after operation of the chainsaw; keep all body parts
away from the silencer. Serious burns may occur if
contact is made with the silencer.
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SPECIFIC SAFETY RULES
PROPER CLOTHING FOR SAFETY
PUSH AND PULL
■ Wear close-fitting clothing. Always wear heavy, long
trousers, boots, and gloves. Do not wear jewellery,
shorts, sandals, or go barefoot. Do not wear loose-fitting
clothing, which could be drawn into the engine or catch
the chain or undergrowth. Wear overalls, jeans, or
leggings made of cut-resistant material or ones that
contain cut-resistant inserts. Secure hair so that it is
above shoulder level.
The reaction force is always opposite to the direction the
chain is moving.Thus, the operator must be ready to control
the PULL when cutting on the bottom edge of the bar and
the PUSH when cutting along the top edge.
NOTE: Your chainsaw has been fully factory tested. It is
normal to find some slight oil residue on the saw.
MAINTENANCE PRECAUTIONS
■ Wear non-slip safety footwear and heavy-duty gloves to
Never operate a chainsaw that is damaged, improperly
adjusted, or is not completely and securely assembled.
Be sure that the saw chain stops moving when the throttle
control trigger is released. If the saw chain moves at idling
speed, the carburettor may need adjusting. Refer to
“Operation – Adjusting Idling Speed” later in this manual.
If the saw chain still moves at idling speed after adjust-
ment has been made, contact a Ryobi service dealer for
adjustment and discontinue use until the repair is made.
improve your grip and to protect your hands.
■ Weareye, hearing, andheadprotectionwhenoperating
this equipment.
REFUELLING (DO NOT SMOKE!)
■ To reduce the risk of fire and burn injury, handle fuel
with care. It is highly flammable.
■ Mix and store fuel in a container approved for petrol.
■ Mix fuel outdoors where there are no sparks or flames.
WARNING:
■ Select bare ground, stop the engine, and allow it to cool
All chainsaw service, other than items in the
operator’s manual maintenance instructions, should
be performed by competent chainsaw service
personnel. If improper tools are used to remove the
flywheel or clutch, or if an improper tool is used to
hold the flywheel in order to remove the clutch,
structural damage to the flywheel could occur which
could subsequently cause the flywheel to burst and
serious injury could result.
before refuelling.
■ Loosen the fuel cap slowly to release pressure and to
keep fuel from escaping around the cap.
■ Tighten the fuel cap securely after refuelling.
■ Wipe spilled fuel from the unit. Move 15 m (50 ft.) away
from refuelling site before starting engine.
■ Never attempt to burn off spilled fuel under
any circumstances.
BASIC PRECAUTIONS IN THE CUTTING/
WORK AREA
■ Do not operate a chainsaw in a tree.
KICK-BACK
Kick-back is a dangerous reaction that can lead to serious
injury. Do not rely only on the safety devices provided with
your saw. As a chainsaw user, you must take special
safety precautions to help keep your cutting jobs free from
accident or injury.
■ Do not cut from a ladder: this is extremely dangerous.
■ Keep bystanders and animals out of the work area.
Do not allow other persons to be nearby during starting
or cutting with the chainsaw.
NOTE: Refer to “Operation” later in this manual for added
information on kick-back and how to avoid serious personal
injury.
NOTE: The size of the work area depends on the job
being performed as well as the size tree or workpiece
involved. For example, felling a tree requires a larger
work area than making other cuts, i.e., bucking
cuts, etc.
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SYMBOLS
Important: Some of the following symbols may be used on your tool. Please study them and learn their meaning. Proper
interpretation of these symbols will allow you to operate the tool better and more safely.
SYMBOL
NAME
EXPLANATION
Indicates danger, warning or caution. It means
attention!!! Your safety is involved.
Safety Alert Symbol
Your manual contains special messages to bring
attention to potential safety concerns, machine damage
as well as helpful operating and servicing information.
Please read all the information carefully to avoid injury
and machine damage.
Read Your Operator’s Manual
Wear eye, hearing, and head protection when operating
this equipment.
Eye, Hearing, and Head Protection
®
The SAFE-T-TIP nose guard on the guide bar helps
prevent kick-back.
®
SAFE-T-TIP NoseGuard
No smoking, sparks, or open flame when mixing fuel or
filling the fuel tank.
NoSmoking
Hold and operate the saw properly with both hands.
Do not operate the saw using only one hand.
OperatewithTwoHands
OneHanded
Engines produce carbon monoxide which is an odourless,
deadly poison. Do not operate in an enclosed area.
CarbonMonoxide
Kick-back
Danger – beware of kick-back.
Avoid bar nose contact.
Bar Nose Contact
Gloves
Wear non-slip gloves.
RUN
To stop the engine, move the switch to the “O” STOP
position.
I = ON to Run
O = OFF to Stop
Switch
“O”
STOP
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SYMBOLS
Petrol
Use unleaded petrol intended for motor vehicle use
with an octane rating of 87 ([R + M] / 2) or higher.
Oil
Use 2-cycle oil for air cooled engines.
Mix Petrol and Oil
Mix the fuel mix thoroughly and also each time
beforerefuelling.
SAVE THESE INSTRUCTIONS
SPECIFICATIONS
Weight - No bar, chain, fuel or oil................................................................................................................ 4.4 kg (9.7 lbs)
Fuel tank capacity ................................................................................................................................ 20.25 oz.(19.4 oz.)
Oil tank capacity.....................................................................................................................................12.3 oz. (11.8 oz.)
Bar lengths ...................................................................................................................................... 41 - 50 cm (16 - 20 in.)
Chain pitch ............................................................................................................................................. 8.26 mm (.325 in.)
Chaingauge............................................................................................................................................ 1.27 mm (.050 in.)
Chain type .............................................................................................................................................Semi-Chisel,LoPro
Drive sprocket ........................................................................................................................................................7 - tooth
Engine displacement ................................................. ...................................................................... 45 cm3 (2.75 cu. in.)
Maximum engine power (ISO 7293) .................................................................................................... 1.9 kW (2.5 HP)
Maximum engine speed with attachment ..........................................................................................................12,500 min-1
Idle engine speed....................................................................................................................................2,800 - 3,400 min-1
Sound pressure level (ISO 7182) ........................... .......................................................................... LpA av = 103.9 dBA
Sound power level (ISO 9207) ............................................................................................................ LwA av = 110 dBA
Vibration(ISO7505):
Front Handle ......................................................................................................................................... 3.5 m/s2
Rear Handle .............................................. ........................................................................................... 7.7 m/s2
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FEATURES
(K) Throttle Lock Button
See Figure 1.
(L) Chain Oil Cap
(M) Silencer
(A) Front hand guard/Chain Brake
(B) Front handle
(C) Cylinder cover
(D) Primer bulb
(N) Carburettor Adjustment
(O) Rear handle
(P) Throttle Trigger
(Q) Fuel Mix Cap
(R) On/Off Switch
(S) Starter/Fan Housing
(T) Starter Grip
(E) Choke Lever
(F) Chain
(G) SAFE-T-TIP®
(H) Guide Bar
(I) Chain Catcher
(J) Trigger Release
OPERATION
The rakers (depth gauges) ahead of each cutter can minimise
the force of a kick-back reaction by preventing the cutters from
digging in too deeply at the kick-back zone. Only use
replacement chain that is equivalent to the original chain or
has been certified as a low kick-back chain.
For your safety, study this entire manual before operating the
saw. Pay particular attention to the precautions and instructions
listed in the operator’s manual.
WARNING:
The warnings and instructions in this section of the
operator’s manual are for your safety and to prevent
serious personal injury.
As saw chains are sharpened, they lose some of the low
kick-back qualities and extra caution is required.
GUIDE BARS
Generally, guide bars with small radius tips have somewhat
lower kick-back potentials.
UNDERSTANDING YOUR CHAINSAW
SAFETY DEVICES
When making a replacement, be sure to order one of the Ryobi
bars listed for your saw in this operator’s manual. The proper
size SAFE-T-TIP® nose guard comes installed on the bar. Use
only guide bars that have a provision for mounting the
SAFE-T-TIP®.
SAFE-T-TIP® ANTI-KICK-BACK NOSE GUARD
See Figure 2.
The SAFE-T-TIP® (A) prevents kick-back because it covers the
tip of the bar where rotational kick-back is generated.
Inexperienced persons should never attempt to cut when the
SAFE-T-TIP® has been removed from the bar tip.
CHAIN BRAKE
See Figure 3.
Chain brakes are designed to quickly stop the chain from
rotating. When the chain brake lever/hand guard is pushed
towards the bar, the chain should stop immediately. A chain
brake does not prevent kick-back.
Users such as professional loggers who need to draw the tip
through the cut, make boring cuts, or cut logs bigger than the
bar length, should reinstall the SAFE-T-TIP® as soon as those
cuts are complete. When cutting without the SAFE-T-TIP®, the
user must use proper techniques as shown in the manual to
avoid kick-back.
The chain brake should be cleaned and tested daily. Refer
to “Operation” later in this manual for additional information.
(A) RUNPOSITION
(B) BRAKE POSITION
NOTE: Refer to “Maintenance” later in this manual for instruc-
tions on reinstalling the SAFE-T-TIP® nose guard.
LOW KICK-BACK SAW CHAIN
WARNING:
A low-kick-back saw chain is a chain which has met the
kick-back performance requirements of ANSI B175.1-2000
(American National Standard for Power Tools - Petrol-Powered
Chainsaws - Safety Requirements) when tested on the repre-
sentative sample of chainsaws below 3.8 c.i.d. specified in ANSI
B175.1-2000.
Even with daily cleaning of the mechanism, the
dependability of a chain brake to perform under field
conditions cannot be certified. Keep the SAFE-T-TIP nose
guard on the saw guide bar and use proper cutting
techniques.
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OPERATION
MIXING THE FUEL
■ This product is powered by a 2-cycle engine and requires
pre-mixing petrol and 2-cycle oil. Pre-mix unleaded petrol
and 2-cycle engine oil in a clean container approved for petrol.
WARNING:
KICK-BACK occurs when the moving chain contacts an
object at the upper portion of the tip of the guide bar or
when the wood closes in and pinches the saw chain in
the cut. Contact at the upper portion of the tip of the
guide bar can cause the chain to dig into the object
and stop the chain for an instant. The result is a
lightning-fast, reverse reaction which kicks the guide bar
up and back toward the operator. If the saw chain is
pinched along the top of the guide bar, the guide bar can
be driven rapidly back towards the operator. Either of
these reactions may cause you to lose control of the saw,
which could result in serious injury
■ This engine is certified to operate on unleaded petrol
intended for motor vehicle use with an octane rating of
87 ([R + M] / 2) or higher.
■ Do not use any type of pre-mixed petrol/oil from fuel service
stations. This includes the pre-mixed petrol/oil intended for
use in mopeds, motorcycles, etc.
■ Use a high quality 2-cycle self-mixing oil for air-cooled
engines. Do not use motor vehicle oil or 2-cycle outboard oil.
■ Mix 2% oil into the petrol. This is a 50:1 ratio.
■ Mix the fuel thoroughly each time before refuelling.
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.
■ Mix in small quantities. Do not mix quantities larger than
usable in a 30-day period. A 2-cycle oil containing a fuel
stabiliser is recommended.
KICK-BACK PRECAUTIONS
See Figures 4 and 5.
Rotational kick-back (A) occurs when the moving chain contacts
an object at the Kick-back Danger Zone (B) of the guide bar.
The result is a lightning-fast, reverse reaction which kicks the
guide bar up and back towards the operator. This reaction may
cause loss of control which can result in serious injury.
FILLING THE TANK
See Figure 6.
FUEL AND REFUELLING
Refer to “Specific Safety Rules – Refuelling” earlier in this
manual for additional safety information.
HANDLING THE FUEL SAFELY
1. Clean the surface around fuel cap to prevent contamination.
2. Loosen the fuel cap slowly.
3. Carefully pour the fuel mixture into the tank. Avoid spillage.
4. Prior to replacing the fuel cap, clean and inspect the gasket.
WARNING:
Always turn off engine before refuelling. Never add fuel
to a machine with a running or hot engine. Move at least
15 m (50 ft.) from refuelling site before starting the engine.
DO NOT SMOKE! Failure to heed this warning can result
in possible personal injury.
5. Immediately replace the fuel cap and hand tighten. Wipe up
any fuel spillage.
NOTE: It is normal for the engine to emit smoke during and
after the first use.
WARNING:
Check for fuel leaks. If any are found, correct them before
using the saw to prevent fire or burn injury.
1 Litre
+
+
+
+
+
20 ml
40 ml
60 ml
80 ml
100 ml
=
=
=
=
=
■ Always handle fuel with care: it is highly flammable.
■ Always refuel outdoors and do not inhale fuel vapour.
■ Do not let petrol or oil come in contact with skin.
2 Litres
3 Litres
4 Litres
5 Litres
50:1
}
■ Keep petrol and oil away from the eyes. If petrol or oil comes
in contact with the eyes, wash them immediately with clean
water. If irritation is still present, see a doctor immediately.
CHAIN OIL SYSTEM
See Figure 7.
■ Clean up spilled fuel immediately.
Use RYOBI Bar and Chain Oil. It is designed for chains
and chain oilers, and is formulated to perform over a wide
temperature range with no dilution required. Chainsaw should
use approximately one tank of oil per tank of fuel.
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OPERATION
NOTE: Do not use dirty, used or otherwise contaminated oils.
Damage may occur to the oil pump, bar, or chain.
1. Carefully pour the bar and chain oil into the tank.
2. Fill the oil tank every time you fuel the engine.
CAUTION:
Failure to release partial throttle when chain brake lever
is in the brake position will result in serious damage to
the unit. Never squeeze and hold the throttle trigger while
the chain brake is in the brake position.
STARTING THE ENGINE
See Figure 8.
Now you are ready to pick up the saw. Use the proper grip for
both handles. Refer to “Operation – Proper Grip on Handles”
later in this manual for additional information.
WARNING:
Keep your body to the left of the chain line. Never straddle
the saw or chain, or lean over past the chain line.
STARTING A WARM ENGINE:
Follow the instructions for starting a cold engine (steps 1-9),
but do not attempt to start in the full choke position (skip
step 5). Push and release primer bulb 7 times. Pull the choke
out and push back it in to the original run position.
1. Place the chainsaw on level ground and ensure that no
objects or obstructions which could come in contact with the
bar and chain are in the immediate vicinity.
2. Hold the front handle firmly with the left hand and put your
right foot onto the base of the rear handle.
STOPPING THE ENGINE
See Figures 15.
STARTING A COLD ENGINE:
See Figure 3 and 8 through 14.
Release the throttle trigger and let the engine return to idle.
To stop the engine, move the ignition switch to the “O” stop
position (J). Do not put the chainsaw on the ground when the
chain is still moving. For additional safety, set the chain brake
when the saw is not in use.
3. Move the chain brake to the BRAKE position (B).
See Figure 3.
NOTE: Set the chain brake by pushing the chain brake
lever/hand guard forward (towards the bar), to the brake
position. Refer to “Operation – Operating the Chain Brake”
later in this manual for additional information.
In the event that the ignition switch will not stop the saw, pull
the choke lever out to the fully extended position (Full Choke)
and engage chain brake to stop the engine.
4. Set the ignition switch to the RUN (I) position (A).
5. Fully press and release the PRIMER BULB (C) 7 times.
6. Pull CHOKE (D) lever all the way OUT to full position (E).
The partial throttle position is automatically set when the
choke lever is set at full choke.
If the ignition switch will not stop the saw when set to the “O”
stop position, have the ignition switch repaired before using
the chainsaw again to prevent unsafe conditions or serious injury.
Important: When you have finished using the saw, relieve tank
pressures by loosening the CHAIN OIL and FUEL MIX caps.
Then retighten the caps. Allow the engine to cool before storing.
7. Pull STARTER (F) until engine attempts to start.
Slowly pull the starter grip out for a short distance until you
feel the starter engage, then briskly pull straight up. Do not
pull to the end of the rope; this may damage the starter. Hold
onto the grip during rewinding.
PREPARING FOR CUTTING
PROPER CLOTHING FOR SAFETY
See Figure 16.
Pull the starter rope until the first firing of the engine is heard
(no more than five pulls).
■ Wear loose-fitting clothing (A). Always wear heavy, long
trousers (B), boots (C), and gloves (D). Do not wear
jewellery, shorts, sandals, or go barefoot. Do not wear
loose-fitting clothing, which could be drawn into the engine
or catch the chain or undergrowth. Wear overalls, jeans, or
leggings made of cut-resistant material or ones that contain
cut-resistant inserts. Secure hair so that it is above shoulder
level.
NOTE: A new unit may require additional pulls.
8. Push CHOKE lever (D) all the way IN (G).
9. Pull STARTER until engine runs.
NOTE: Allow the saw to run in this position 15-30 seconds
depending upon the temperature.
10. SQUEEZE and release the throttle trigger (H).
■ Wear non-slip safety footwear and heavy-duty gloves to
Depress the throttle trigger which releases the trigger lock
button. Squeeze and release the throttle trigger to let the
engine idle.
improve your grip and to protect your hands.
■ Wear eye (E), hearing (F), and head (G) protection when
operating this equipment.
11. Move chain brake to RUN position.
Place chain brake lever/hand guard into the RUN position.
Refer to “Operation – Operating Chain Brake” for additional
information.
PROPER GRIP ON HANDLES
See Figures 17 and 18.
Refer to “Specific Safety Rules – Proper Clothing for Safety”
earlier in this manual for appropriate safety
equipment.
CAUTION:
■ Wear non-slip gloves for maximum grip and protection.
Failure to release partial throttle when chain brake lever is
in the brake position will result in serious damage to the
unit. Never squeeze and hold the throttle trigger while the
chain brake is in the brake position.
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OPERATION
2. Accelerate the engine to full throttle just before entering the
■ 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.
cut by squeezing the throttle trigger.
3. Begin cutting with the saw against the log.
4. Keep the engine at full throttle the entire time you are cutting.
WARNING:
Never use a left-handed (cross-handed) grip or any stance
that would place your body or arm across the chain line.
5. Allow the chain to cut for you; exert only light downward
pressure. Forcing the cut could result in damage to the bar,
chain, or engine.
6. Release the throttle trigger as soon as the cut is completed,
allowing the engine to idle. Running the saw at full throttle
without a cutting load may result in unnecessary wear to the
chain, bar, and engine.
■ Maintain a proper grip on the saw whenever the engine is
running. The fingers should encircle the handle and the
thumb be wrapped under the handlebar. This grip is least
likely to be broken (by a kick-back or other sudden reaction
of the saw). Any grip in which the thumb and fingers are on
the same side of the handle is dangerous because a slight
kick of the saw can cause loss of control.
7. Do not put pressure on the saw at the end of the cut.
WORK AREA PRECAUTIONS
See Figure 21.
■ 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 your saw. Allow no person
to use this chainsaw who has not read this operator’s
manual or received adequate instructions for the safe and
proper use of this chainsaw.
■ 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 ft (4.5 m).
between workers.
CHAIN LINE
WARNING:
DO NOT operate the throttle 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.
■ 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 kick-back forces.
PUSH AND PULL
See Figure 19.
■ Do not fell trees near electrical wires or buildings. Leave this
operation for professionals.
The reaction force is always opposite to the direction the chain
is moving. Thus, the operator must be ready to control the PULL
(A) when cutting on the bottom edge of the bar and the PUSH
(B) when cutting along the top edge.
■ Cut only when visibility and light are adequate for you to
see clearly.
ADJUSTING THE CARBURETTOR
See Figures 22, 23, and 24.
NOTE: Your chainsaw has been fully factory tested. It is normal to
find some slight oil residue on the saw.
Before adjusting the carburettor, clean the air filter (A) and the
starter cover vents (B). Allow the engine to warm up prior to
carburettor adjustment. Refer to “Maintenance” later in this
manual.
PROPER CUTTING STANCE
See Figure 20.
■ Balance your weight with both feet on solid ground.
The carburettor is factory set and should not require adjusting.
The carburettor will permit only limited adjustment of the
“L” (Low Jet) and “H” (High Jet) needles. Any adjustment
should be done by a Ryobi service dealer.
■ Keep left arm with elbow locked in a “straight arm” position
(B) to withstand any kick-back force.
■ Keep your body to the left of the chain line (A).
■ Keep your thumb on underside of handlebar (C).
Under no circumstances should the “L” (Low Jet) and “H”
(High Jet) needles be forced outside the range of adjustment.
BASIC OPERATING/CUTTING PROCEDURES
Practise cutting a few small logs using the following technique to
get the “feel” of using your saw before you begin a major sawing
operation.
CAUTION:
Serious damage may occur to the engine if improper
adjustments are made to the “L” and “H” needles.
1. Take the proper stance in front of the wood with the
saw idling.
Do not force the “L” and “H” needles outside the
adjustment range!
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OPERATION
■ Consider the distribution and weight of heavy limbs (B).
ADJUSTING IDLING SPEED
■ Clear out the undergrowth around the tree to be felled (C).
■ Do not cut trees near electrical wires or buildings (D).
■ Consider the direction in which the tree leans (E).
See Figure 24.
■ If the engine starts, runs, and accelerates but will not idle,
turn the idling speed screw “T” clockwise to increase
idling speed.
■ Check the tree for damaged or dead branches which could
■ If the chain turns at idle, turn the idling speed screw “T”
anticlockwise to reduce the idle RPM and stop the chain
movement. If the saw chain still moves at idling speed,
contact a Ryobi service dealer for adjustment and discon-
tinue use until the repair is made.
fall and hit you during felling (F).
■ Periodically glance at the top of the tree during the back-cut
to assure the tree is going to fall in the desired direction.
■ Keep all bystanders at a safe distance (G) (at least twice the
height of the tree).
■ Prepare a path of safe retreat (H).
WARNING:
■ 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!
THE SAW CHAIN SHOULD NEVER TURN AT IDLE. Turn
the idling speed screw “T” anticlockwise to reduce the idle
RPM and stop the chain, or contact a Ryobi service dealer
for adjustment and discontinue use until the repair is
made.
■ Consider the wind direction before felling a tree.
■ Do not fell trees near power lines or near buildings which
could be struck by falling limbs or the tree itself.
Serious personal injury may result from the saw chain
turning at idle.
■ 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.
OPERATING THE CHAIN BRAKE
See Figures 25 and 26.
■ Remove dirt, stones, loose bark, nails, staples, and wire
from the tree where felling cuts are to be made.
Refer to “Safety” earlier in this manual for additional information.
Check the operating condition of the chain brake prior to
each use.
WARNING:
Do NOT fell trees near power lines or near buildings
which could be struck by falling limbs or the tree itself.
1. Start the engine and grasp the front and rear handles
securely with both hands.
2. Pull the throttle trigger to bring the chainsaw up to full speed.
Using the back of your left hand, engage the chain brake (A)
by pushing the chain brake lever/hand guard toward the bar
while the chain is rotating rapidly. See Figure 25.
PROPER PROCEDURE FOR TREE FELLING
See Figure 28 through 31.
1. Pick your escape route (or routes in case the intended
route is blocked). Clear the immediate area around the
tree and make sure there are no obstructions in your
planned path of retreat. Clear the path of safe retreat
approximately 135° from the planned line of fall (A).
NOTE: The chain brake should engage and stop the chain
immediately. If not, stop the saw by placing the ignition switch
in the “O” stop position. Take the saw to a Ryobi service
dealer for repair and discontinue use until the repair is made.
3. Reset the chain brake back into the RUN position (B) by
grasping the right-hand side (from operator’s position) of the
chain brake lever/hand guard and pull towards the front
handle until you hear a click. See Figure 26.
2. 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 (B).
FELLING TREES - HAZARDOUS
CONDITIONS
See Figure 27.
3. Cut a notch about 1/3 the diameter of the trunk in the side of
the tree (C). Make the notch cuts so they intersect at right
angles 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.
WARNING:
Do not fell trees during periods of high wind or heavy
precipitation. Wait until the hazardous weather has ended.
4. Make the back-cut (D) level and horizontal, and at a
minimum of 2 inches (5 cm) above the horizontal cut of
the notch.
When felling a tree, it is important that you heed the following
warnings to prevent possible serious injury.
NOTE: Never cut through to the notch. Always leave a band
of wood between the notch and back cut (approximately
2 inches (5 cm) or 1/10 the diameter of the tree). This is
called a “hinge” or “hingewood” (E). It controls the fall of the
tree and prevents slipping or twisting or shoot-back of the
tree off the stump.
■ Wear eye, hearing, and head protection (A) when operating
this equipment.
■ Do not cut down trees having an extreme lean or large trees
with rotten or dead limbs, loose bark, or hollow trunks. Have
these trees pushed or dragged down with heavy equipment,
then cut them up.
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OPERATION
BUCKING LOGS UNDER STRESS
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 (F) into the cut so
they do not touch the chain. Drive wedges in, little by little,
to help jack the tree over.
See Figure 35.
(C) LOG SUPPORTED AT ONE END.
(D) LOG SUPPORTED AT BOTH ENDS.
Make the first bucking cut (E) 1/3 of the way through the log and
finish with a 2/3 cut (F) on the opposite side. As you cut the log,
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.
When bucking or felling with a wedge, it may be necessary
to remove the SAFE-T-TIP® anti-kick-back device to allow
the bar to be drawn through the cut. After you complete the
cut, reinstall the tip immediately.
5. 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.
Give special attention to logs under stress (G) to prevent the bar
and chain from pinching.
OVERBUCKING
See Figure 19.
WARNING:
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 (A).
Never cut through to the notch when making a back cut.
The hinge controls the fall of the tree: this is the section
of wood between the notch and back-cut.
UNDERBUCKING
See Figure 19.
REMOVING BUTTRESS ROOTS
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 (B).
Be prepared for this reaction and hold the saw firmly to
maintain control.
See Figure 32.
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 (A) into the buttress first,
followed by the vertical cut (B). Remove the resulting loose
section (C) from the work area. Follow the correct tree felling
procedure after you have removed the large buttress roots.
Refer to “Operation – Proper Procedure for Tree Felling” earlier
in this manual.
LIMBING AND PRUNING
See Figure 36.
■ Work slowly, keeping both hands on the saw with a firm
grip. Maintain secure footing and balance.
BUCKING
■ Keep the tree between you and the chain while limbing.
Cut from the side of the tree opposite the branch you
are cutting.
See Figure 33.
Bucking is the term used for cutting a fallen tree to the desired
log length.
■ Do not cut from a ladder: this is extremely dangerous.
Leave this operation for professionals.
■ Cut only one log at a time.
■ Do not cut above chest height as a saw held higher is
■ Support small logs on a sawing stand or another log while
difficult to control against kick-back.
bucking.
■ Keep a clear cutting area. Make sure that no objects can
contact the guide bar nose and chain during cutting: this
can cause kick-back (A). To avoid the danger, keep the
SAFE-T-TIP® anti-kick-back device attached while cutting.
Refer to “Safety – Kick-back” earlier in this manual.
WARNING:
Never climb into a tree to limb or prune. Do not stand on
ladders, platforms, a log, or in any position which may
cause you to lose your balance or control of the saw.
■ During bucking operations, stand on the uphill side so that
the cut-off section of the log cannot roll over you.
■ When pruning trees it is important not to make the flush cut
next to the main limb or trunk until you have cut off the limb
further out to reduce the weight. This prevents stripping the
bark from the main member.
■ Sometimes it is impossible to avoid pinching (with just
standard cutting techniques) or difficult to predict which
way a log will settle when cut.
BUCKING WITH A WEDGE
1. Underbuck the branch 1/3 through for your first cut (A).
See Figure 34.
2. Overbuck the branch to drop it (B).
If the wood diameter is large enough for you to insert a soft
bucking wedge (B) without touching the chain, you should use
the wedge to hold the cut open to prevent pinching.
3. Finish by cutting smoothly and neatly against the main
member (C) so the bark will grow back to seal the wound.
NOTE: When bucking or felling with a wedge, you may need to
remove the SAFE-T-TIP® anti-kick-back device to allow the bar
to be drawn through the cut. After you have finished, reinstall
the tip.
WARNING:
If the limbs to be pruned are above chest height, hire
a professional to perform the pruning.
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OPERATION
CUTTING SPRING POLES
See Figure 37.
WARNING:
A spring pole (A) 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 spring-poles: they are dangerous.
Spring poles 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.
MAINTENANCE
13. Tighten the bar mounting nuts finger tight only. The bar
ASSEMBLING THE BAR AND CHAIN
See Figures 3 and 38 to 47.
must be free to move for tension adjustment.
14. Remove all slack from the chain by turning the chain
tensioning screw (M) clockwise until the chain seats snugly
against the bar with the drive links in the bar groove.
DANGER:
15. Lift the tip of the guide bar up to check for sagging (N).
Never start the engine before installing the guide bar,
chain, drivecase cover, and clutch drum. Without all these
parts in place, the clutch can fly off or explode exposing
the user to possible serious injury.
16. Release the tip of the guide bar and turn the chain
tensioning screw 1/2 turn clockwise. Repeat this process
until sagging does not exist.
17. Hold the tip of the guide bar up and tighten the bar
mounting nuts (O) securely.
WARNING:
To avoid serious personal injury, read and understand
all the safety instructions in this section.
The chain is correctly tensioned when there is no sagging on
the underside of the guide bar, the chain is snug, but it can be
turned by hand without binding. See Figure 47. Ensure that the
chain brake is not set.
NOTE: If chain is too tight, it will not rotate. Loosen the bar nuts
slightly and turn the tension adjuster 1/4 turn anticlockwise. Lift
the tip of the guide bar up and retighten the bar nuts securely.
Ensure that the chain will rotate without binding.
1. Always place the switch in the stop “O” position before you
work on the saw.
2. Make sure the chain brake is not set by pulling the chain
brake lever/hand guard towards the front handle to the
RUN position (A). See Figure 3.
ADJUSTING THE CHAIN TENSION
See Figures 48, 49, and 50.
3. Wear gloves when handling the chain and bar. These
components are sharp and may contain burrs.
4. Remove the bar mounting nuts (B) using a combination
WARNING:
wrench (C) or a 5/8 in. spanner.
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.
5. Remove the clutch cover (D), and the outer guide bar
plate (E).
6. Lay out the saw chain in a loop and straighten any kinks.
The cutters (F) should face in the direction of chain rotation
(G). If they face backwards, turn the loop over.
1. Stop the engine before setting the chain tension.
2. Make sure the guide bar nuts are loosened to finger tight and
7. Place the chain drive links (H) into the bar groove (I).
turn the chain tensioner clockwise to tension the chain.
8. Position the chain so there is a loop at the back of the bar.
NOTE: A cold chain is correctly tensioned when there is no
slack on the underside of the guide bar, the chain is snug but
can be turned by hand without binding.
9. Hold the chain in position on the bar and place the loop
round the sprocket (J).
10. Fit the bar flush against the mounting surface so that the
3. Retension the chain whenever the flats on the drive links (A)
bar studs (K) are in the long slot of the bar.
hang out of the bar groove.
NOTE: When placing the bar on the bar studs ensure that
the adjusting pin (L) is in the chain tension pin hole.
NOTE: During normal saw operation, the temperature of the
chain increases. The drive links of a correctly tensioned
warm chain (B) will hang approximately 1.25 mm (0.05 in.)
out of the bar groove. To help determine the correct warm
chain tension, the tip of the combination wrench (C) can be
used as a guide.
11. Replace the outer guide bar plate ensuring that the bar pin
groove is at the bottom with the upper and lower edges
angled away from the guide bar.
12. Replace the clutch cover and bar mounting nuts.
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MAINTENANCE
4. Keep the file level with the top plate of the tooth. Do not let
NOTE: New chain tends to stretch. Check the chain tension
the file dip or rock. See Figure 54.
frequently and tension as required.
5. Using light but firm pressure, stroke towards the front corner
of the tooth. See Figure 55.
CAUTION:
6. Lift the file away from the steel on each return stroke.
A chain tensioned while warm may be too tight upon
cooling. Check the “cold tension” before next use.
7. Put a few firm strokes on every tooth. File all left-hand cutters
(A) in one direction. Then move to the other side and file
the right-hand cutters (B) in the opposite direction. See
Figure 56.
CHAIN MAINTENANCE
See Figures 51 and 52.
8. Remove filings from the file with a wire brush.
CAUTION:
A dull or improperly sharpened chain can cause
excessive engine speed during cutting which may
result in severe engine damage.
CAUTION:
Check that the switch is in the STOP “
you work on the saw.
” position before
Use only a low-kick-back chain on this saw. This fast-cutting
chain provides kick-back reduction when properly maintained.
WARNING:
For smooth and fast cutting, maintain the chain properly.
Improper chain sharpening increases the potential
of kick-back.
The chain requires sharpening when the wood chips are small
and powdery, the chain must be forced through the wood during
cutting, or the chain cuts to one side. During maintenance of the
chain, consider the following:
WARNING:
Failure to replace or repair a damaged chain can cause
serious injury.
■ Improper filing angle of the side plate can increase the risk
of a severe kick-back.
■ Raker (depth gauge) clearance (A). See Figure 55.
1. Too low increases the potential for kick-back.
2. Not low enough decreases cutting ability.
WARNING:
The saw chain is very sharp. Always wear protective
gloves when performing maintenance to the chain.
■ If the cutter teeth hit hard objects such as nails and stones,
or are abraded by mud or sand on the wood, have the Ryobi
service dealer sharpen the chain.
NOTE: Inspect the drive sprocket for wear or damage when
replacing the chain (B). If signs of wear or damage are
present in the areas indicated, have the drive sprocket
replaced by a Ryobi service dealer. See Figure 56.
TOP PLATE FILING ANGLE
See Figure 57.
■ (A) - CORRECT 30° – file holders are marked with guide
marks to align file properly to produce correct top plate
angle.
SHARPENING THE CUTTERS
See Figures 53 through 56.
PARTS OF A CUTTER
■ (B) - LESS THAN 30° – for cross cutting.
(E) Gullet
(A) Cutting Corner
(B) Side Plate
(C) Depth Gauge
(D) Toe
■ (C) - MORE THAN 30° – feathered edge dulls quickly.
(F) Heel
SIDE PLATE ANGLE
See Figure 58.
■ (D) - CORRECT 80o – Produced automatically if you use the
(G) Rivet hole
(H) Top Plate
correct diameter file in the file holder.
Be careful to file all cutters to the specified angles and to the
same length, as fast cutting can only be obtained when all
cutters are uniform.
■ (E) - HOOK – “Grabs” and dulls quickly, increases the
potential of KICK-BACK.
Results from using a file with a diameter too small or a file
held too low.
1. Wear gloves for protection.
2. Tension the chain prior to sharpening.
■ (F) - BACKWARD SLOPE – Needs too much feed pressure,
NOTE: Refer to “Maintenance – Adjusting the Chain Tension”
earlier in this manual.
causes excessive wear to the bar and chain.
Results from using a file with a diameter too large or file held
too high.
3. Use a 4 mm (5/32 in.) diameter round file and holder. Do all
your filing at the midpoint of the bar.
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MAINTENANCE
MAINTAINING DEPTH GAUGE CLEARANCE
See Figures 51, 59, and 60.
WARNING:
Although the guide bar comes with a SAFE-T-TIP®
anti-kick-back device already installed, you need to check
the tightness of the mounting screw before each use.
■ Maintain the depth gauge (A) at a clearance of 0.6 mm
(0.025”). Use a depth gauge tool for checking the depth
gauge clearances.
■ Every time the chain is filed, check the depth gauge
clearance.
Tighten the mounting screw (A) of the nose guard as instructed
below. These are specially hardened screws. If you cannot install
the screw tightly, replace both the screw and the SAFE-T-TIP®
(B) before further operation. Do not replace the screw with an
ordinary screw.
■ Use a flat file (B) (not provided) and a depth gauge jointer
(C) (not provided) to lower all gauges uniformly.
Use a 0.6 mm (0.025 in.) depth gauge jointer.
After lowering each depth gauge, restore original shape by
rounding the front (D). Be careful not to damage adjoining
drive links with the edge of the file.
In addition to preventing chain contact with solid objects at the
nose of the bar, the SAFE-T-TIP® also helps keep the chain
away from abrasive surfaces, such as the ground. Keep it on the
right-hand side of the bar where it will be between the chain and
the ground during flush with ground cutting.
■ Depth gauges must be adjusted with the flat file in the same
direction the adjoining cutter was filed with the round file.
Use care not to contact cutter face with flat file when
adjusting depth gauges.
The mounting screw requires a 5/16 in. spanner (or adjustable
spanner) to achieve the recommended tightness of 4-5 Nm
(35 - 45 in. lb.). A tightness within this range can be achieved
by using the following method.
MAINTAINING THE GUIDE BAR
See Figure 61.
1. Tighten the screw with your finger.
CAUTION:
Make sure the chain has stopped before you do any work
on the saw.
2. Tighten the screw an additional 3/4 of a turn using
a spanner (C).
MOUNTING THE SAFE-T-TIP® NOSE GUARD
See Figures 62 and 63.
Every week of use, reverse the guide bar on the saw to
distribute the wear for maximum bar life.The bar should be
cleaned every day of use and checked for wear and damage.
1. Mount the SAFE-T-TIP® on the bar nose.
2. Fit the locking rivet or tab in the recessed hole in the guide bar.
3. Tighten the screw with your finger.
Feathering or burring of the bar rails is a normal process of bar
wear. Such faults should be smoothed with a file as soon as
they occur.
4. From the finger-tight position, tighten the screw an additional
3/4 of a turn using a spanner.
A bar with any of the following faults should be replaced:
CLEANING THE AIR FILTER
■ Wear inside the bar rails which permits the chain to lie over
See Figures 64, 65, and 66.
sideways
NOTE: Always clean the air filter before making any mixture
adjustments of the carburettor.
■ Bent guide bar
■ Cracked or broken rails
■ Spread rails
1. For access to the air filter and carburettor area, loosen the
three screws (A) holding the cylinder cover (B).
In addition, lubricate guide bars (with a sprocket at their tip)
weekly. Using a grease syringe, lubricate weekly in the
lubricating hole.
2. Activate chain brake.
3. Lift the front of the cylinder cover past chain brake lever.
4. Lift the back of the cylinder cover past the handle.
Turn the guide bar and check that the lubrication holes
(A) and chain groove are free from impurities.
5. Before removing the air filter from the carburettor, blow or
brush as much loose dirt and sawdust from around the
carburettor and chamber as possible.
MAINTAINING THE SAFE-T-TIP®
NOSE GUARD
See Figures 62 and 63.
NOTE: Be sure to pull the choke rod out to keep the carbu-
rettor from being contaminated.
6. Remove the screw (C) securing the air filter (D).
7. Position a flat screw driver between the tabs and twist as
CAUTION:
Make sure the chain has stopped before you do any work
on the saw.
shown in the illustration.
8. Lift the air filter off the air filter base.
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MAINTENANCE
Choose one of the following cleaning options:
REPLACING THE SPARKING PLUG
See Figure 71.
9. To lightly clean, tap the filter against a smooth, flat surface
to dislodge most saw dust and dirt particles.
This engine uses a Champion RCJ-4 with 0.63 mm
(0.025”) electrode gap. Use an exact replacement and replace
every six months, or more frequently if necessary.
10. For a more thorough cleaning, clean in warm soapy water,
rinse, and let dry completely.
NOTE: An alternative method is to clean the filter with
compressed air (always wear eye protection to avoid
eye injury).
1. Loosen the sparking plug by turning it anticlockwise with
a spanner.
2. Remove the sparking plug.
11. Reinstall the air filter, making sure that the tabs on the air
filter are located in channels on the air filter bottom before
tightening filter retainer screw.
3. Hand-thread the new sparking plug, turning it clockwise.
NOTE: Be careful not to cross-thread the sparking plug.
Cross-threading will seriously damage the product.
■
Clean the pre-filter (D) every 25 tanks of fuel or sooner, if
required. Remove the cylinder cover (B), starter assembly
(E) and the fan housing baffle (F) for access to the pre-filter
in the engine housing.
CLEANING THE SPARK ARRESTING
SILENCER
See Figure 72.
NOTE: If you use an air hose for drying, blow through both
sides of filter.
The silencer (A) is equipped with a spark arrester screen (B).
A faulty spark arrester screen can create a fire hazard. Through
normal use the screen can become dirty and should be
inspected weekly and cleaned as required. Always keep the
silencer and spark arrester on your saw in good condition.
CAUTION:
Never run the engine without the air filter: serious
damage could result.
WARNING
Make sure the air filter is correctly placed in the air filter
cover before reassembly.
Silencer surfaces are very hot during and after operation
of the chainsaw. Keep all body parts away from the
silencer. Serious burns may occur if contact is made with
the silencer.
CLEANING THE STARTER UNIT
See Figure 67.
Use a brush or compressed air to keep the cooling vents of the
starter assembly free and clean of debris.
1. Allow the silencer to cool.
2. The spark arrester screen (B) is retained by the deflector
(C). Remove the nuts (D) and screen retainer to access
the spark arrester screen.
CLEANING THE ENGINE
See Figures 68 and 69.
Clean the cylinder fins and flywheel fins with compressed air or
a brush periodically. Dangerous overheating of the engine may
occur due to impurities on the cylinder.
3. Replace the spark arrester screen if it is cracked or
otherwise deteriorated.
CHAIN BRAKE
See Figures 73 and 74.
WARNING
Never run the saw without all the parts, including the
drivecase cover and starter housing, securely in place.
■ Remove the clutch cover and clean the chain brake
components. Check wear on the brake band (A). If brake
band is worn or deformed, have it serviced at your nearest
authorised service dealer. The band thickness should not
be less than 0.60 mm (0.024 in.), or worn halfway through.
Because parts can fracture and pose a danger of thrown
objects, leave repairs of the flywheel and clutch to trained
Ryobi service dealer personnel.
■ Always keep the chain brake mechanism clean (B) and
lightly lubricate the linkage (C).
NOTE: Depending on the type of fuel used, the type and amount
of oil used, and/or your operating conditions, the exhaust port
and silencer may become blocked with carbon deposits. If you
notice a power loss with your petrol-powered tool, you may
need to remove these deposits to restore performance. We
highly recommend that only qualified service technicians
perform this service.
■ Always test the chain brake performance after servicing or
cleaning. Refer to “Operation – Operating Chain Brake”
earlier in this manual for additional information.
■ Check and, if damaged, replace the chain catcher (D).
CHECKING THE FUEL FILTER
See Figure 70.
Check the fuel filter (A) periodically. Replace it if contaminated
or damaged.
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MAINTENANCE
4. Clean all foreign material from the saw.
STORING THE CHAINSAW
(1 MONTH OR LONGER)
5. Store it in a well-ventilated place that is inaccessible
to children.
1. Drain all fuel from tank into a container approved for petrol.
NOTE: Keep away from corrosive agents such as garden
chemicals and de-icing salts.
2. Run the engine until it stops. This will remove all fuel-oil mix
that could become stale and leave varnish and gum in the
fuel system.
Abide by all government and local regulations for the safe
storage and handling of petrol. Excess fuel should be used in
other 2-cycle engine powered equipment.
3. Drain all bar and chain oil from tank into a container
approved for oil.
BAR AND CHAIN COMBINATIONS
RECOMMENDED BAR AND CHAIN COMBINATIONS FOR .325 LOW PROFILE .050 GAUGE
Length of Bar
406 mm (16 in.)
457 mm (18 in.)
Guide Bar Part Number
Chain Part Number
984316001
PS06136
984319001
PS06135
TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
SOLUTION
1. No spark.
Engine will not start.
(Make sure ignition switch
is in start position “I”.)
1. Check spark. Remove air filter cover. Remove sparking
plug from cylinder. Reattach the sparking plug wire and
lay sparking plug on top of cylinder with the metal part
of plug touching the cylinder. Pull the starter rope and
watch for spark at sparking plug tip. If there is no spark,
repeat test with a new sparking plug.
2. Flooded engine.
2. With the ignition switch off, remove sparking plug. Move
choke lever to run position (pushed in completely) and
pull starter cord 15 to 20 times. This will clear excess
fuel from engine. Clean and reinstall sparking plug.
Set ignition switch to run (I) position. Push and fully
release primer bulb 7 times. Pull starter three times with
choke lever at run. If engine does not start, move choke
lever to choke and repeat normal starting procedure.
If engine still fails to start, repeat procedure with a new
sparking plug.
Carburettor requires “L” (Low jet)
adjustment.
Engine starts but will not
accelerate properly.
Contact a Ryobi service dealer for carburettor adjustment.
Carburettor requires “H” (High jet)
adjustment.
Engine starts but will
not run properly at
high speed.
Contact a Ryobi service dealer for carburettor adjustment.
1. Check oil fuel mixture.
2. Air filter dirty.
Engine does not reach full
speed and/or emits
excessive smoke.
1. Use fresh fuel and the correct 2-cycle oil mix ratio.
2. Clean air filter. Refer to “Maintenance – Cleaning the
Air Filter” earlier in this manual.
3. Spark arrester screen dirty.
3. Clean spark arrester screen. Refer to
“Maintenance – Cleaning the Spark Arresting Silencer”
earlier in this manual.
4. Contact a Ryobi service dealer for carburettor adjustment.
4. Carburettor requires “H”
(High jet) adjustment.
UK
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TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE
SOLUTION
Turn idling speed screw “T” clockwise to increase idling
speed. If chain turns at idle, turn idling speed screw “T”
anticlockwise to decrease speed. Wear protective
equipment and observe all safety instructions. See
Figure 24.
Engine starts, runs,
and accelerates but
will not idle.
Carburettor requires adjustment.
1. Oil tank should be filled every time fuel tank
is filled.
Engine starts and runs,
but chain is not rotating.
1. Chain oil tank empty.
2. Tension chain per instructions in “Maintenance –
Adjusting the Chain Tension” earlier in this manual.
3. Run at half throttle 30 to 45 seconds. Stop saw and
check for oil dripping from SAFE-T-TIP® and guide bar.
If oil is present the chain may be dull or bar may be
damaged. If no oil is on the SAFE-T-TIP®, contact
a Ryobi service dealer.
2. Check chain tension for overtight
condition.
3. Check for oiler function.
1. Release chain brake, refer to “Operation – Operating
Chain Brake” earlier in this manual.
2. Tension chain per instructions in “Maintenance –
Adjusting the Chain Tension” earlier in this manual.
3. Refer to “Maintenance – Assembling the Bar and
Chain” earlier in this manual.
Bar and chain running hot
and smoking.
1. Chain brake engaged.
2. Chain tension too tight.
3. Check guide bar and chain
assembly.
4. Check guide bar and chain
for damage.
4. Inspect guide bar and chain for damage.
NOTE: The carburettor adjustment needle(s) are equipped with plastic cap(s) which prevent anticlockwise rotation from the original
factory adjustment. If your product exhibits specific performance problem(s) where the Troubleshooting Section recommends an
anticlockwise needle adjustment and you have made no adjustments since the original purchase, take the product to a factory authorised
service dealer for repair. In most cases, the needed adjustment is a simple task for the factory trained service representative.
WARRANTY
GUARANTEE – STATEMENT
(RTSA / RTUK / RTG)
All Ryobi products are guaranteed from defects in material and workmanship, for a period of twenty-four (24) months, effective
and evidenced from date of original invoice or delivery note.
Defects caused by normal wear and tear, unauthorised/improper maintenance/handling or overload are excluded from this
guarantee as are accessories such as battery packs, bulbs, blades and bits,etc.
In the event of malfunction within the guarantee period, please return the assembled product with proof of purchase
to your dealer or nearest Ryobi Service Centre.
Your statutory rights in respect of defective products remain unaffected by the warranty.
RyobiTechnologies GmbH, Itterpark 7, D-40724 Hilden, Germany
Ryobi Technologies, Customer Services, Anvil House, Tuns Lane, Henley-on-Thames, RG9 1SA, UK
Ryobi Technologies, BP 50012 - 95945 Roissy CDG Cedex – FRANCE
Ryobi Technologies Australia PTY Limited, 359-361 Horsley Road, Milperra, NSW 2214 Australia
UK
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SAFETY DIRECTIVE
EC DECLARATION OF CONFORMITY
According to machinery directive 98/37/EC and EMC directive 89/336/EEC - We,
RyobiTechnologies Inc., 1428 Pearman Dairy Road, Anderson, SC 29625
Declare in sole responsibility that the product:PCN3840 (RY74005D) and PCN4545 (RY74007D) - to which this certificate
applies, conforms to the basic health and safety requirements of the Machinery Directive 98/37/EC and other relevant
directives, such as EMC Directive 89/336/EEC and Outdoor Directive 2000/14/EC.
EC type examination certificates have been issued by the following approved body:
SLG Prüf - und Zertifizierungs GmbH - Certyfikat nr 100885D
SLG Prüf - und Zertifizierungs GmbH - Certyfikat nr 100889O
To effect correct application of the health and safety requirements stated in the EEC directives, the following European
and/or national standards and/or technical specifications were consulted:
EN292-1:1991 / EN292-1:1991 + A1:1995 / EN 608:1994 / ISO 6533: 2001 / ISO 6534:1992 / ISO 6535:1991 /
ISO 7293:1997 / ISO 7914:2002 / ISO 7915:1991 / ISO 6531:1999 / ISO 8334:1985 / ISO 9518:1998 / ISO 10726:1992 /
EN ISO 14982:1998 / EN ISO 3744:1995 / EN ISO 4871:1996 / ISO 9207:1995 / ISO 7182:1984 / ISO 7505:1986
Ryobi Technologies Inc.
1428 Pearman Dairy Road
Anderson, SC 29625, USA
Wayne Hill
Director, Environmental Compliance
August 25, 2003
UK
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