Ryobi Chainsaw PNC3840 RY74005d, PCN4545 RY74007D User Guide

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  
 
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.  
UK  
3
 
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.  
UK  
4
 
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.  
UK  
5
 
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  
UK  
6
 
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  
UK  
7
 
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.  
UK  
8
 
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.  
UK  
9
 
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.  
UK  
Download from Www.Somanuals.co1m0. All Manuals Search And Download.  
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.  
 
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.  
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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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