Ryobi Outdoor Trimmer PBC3046B User Guide

OPERATOR’S MANUAL  
Trimmer / Brushcutter  
PBC3046B  
RY70107A  
Your new trimmer 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.  
Thank you for buying a Ryobi trimmer.  
SAVETHIS MANUAL FOR FUTURE REFERENCE  
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SAFETY  
Inspect the unit before each use for loose fasteners, fuel  
SPECIFIC SAFETY RULES FOR BRUSHCUTTER AND  
BLADE USE  
leaks etc. Replace any damaged parts before use.  
The string head or blade will rotate during carburettor  
After engine stops, keep rotating blade in heavy grass  
adjustments.  
or pulpy weeds until it stops.  
It has been reported that vibrations from hand-held tools  
may contribute to a condition called Raynaud’s  
Do not operate the brushcutter unless the blade guard is  
firmly secured in place and in good condition.  
Syndrome in certain individuals. Symptoms may include  
tingling, numbness and blanching of the fingers, usually  
apparent upon exposure to cold. Hereditary factors,  
exposure to cold and dampness, diet, smoking and work  
practices are all thought to contribute to the development  
of these symptoms. It is not known at present what, if  
any, vibrations or extent of exposure may contribute to  
the condition. There are measures which can be taken  
by the operator to possibly reduce the effects of vibration:  
Use heavy gloves while installing or removing blades.  
Always stop the engine and remove the sparking plug  
wire before attempting to remove any obstruction caught  
or jammed in the blade or before removing and installing  
theblade.  
Do not attempt to touch or stop the blade when it  
is rotating.  
A coasting blade can cause injury while it continues to  
spin after the engine is stopped or throttle trigger  
released. Maintain proper control until the blade has  
completely stopped rotating.  
a) Keep your body warm in cold weather. When operating  
the unit wear gloves to keep the hands and wrists  
warm. It is reported that cold weather is a major  
factor contributing to Raynaud’s Syndrome.  
Replace any damaged blade. Always make sure blade is  
installed correctly and securely fastened before each  
use. Failure to do so may cause serious injury.  
b) After each period of operation, exercise to increase  
bloodcirculation.  
Use only the manufacturer’s replacementTRI-ARC blade  
intended for use on this brushcutter. Do not use any  
other blade.  
c) Take frequent work breaks. Limit the amount of  
exposure per day.  
d) Keep the tool well maintained, fasteners tightened  
andwornpartsreplaced.  
The TRI-ARC blade is suited for cutting pulpy weeds and  
vines only. Do not use for any other purpose. Never use  
theTRI-ARC blade to cut woody brush.  
If you experience any of the symptoms of this condition,  
immediately discontinue use and see your doctor about  
these symptoms.  
Exercise extreme caution when using the blade with this  
unit. Blade thrust is the reaction which may occur when  
the spinning blade contacts anything it cannot cut.This  
contact may cause the blade to stop for an instant, and  
suddenly “thrust” the unit away from the object that was  
hit.This reaction can be violent enough to cause the  
operator to lose control of the unit. Blade thrust may  
occur without warning if the blade snags, stalls or binds.  
This is more likely to occur in areas where it is difficult to  
see the material being cut. For cutting ease and safety,  
approach the weeds being cut from the right to the left.  
In the event that an unexpected object or woody stock is  
encountered, this could minimise the blade thrust reaction.  
Mix and store fuel in a container approved for petrol.  
Mix fuel outdoors where there are no sparks or flames.  
Wipe up any fuel spillage. Move 9 m (30 ft) away from  
refuelling site before starting engine.  
Stop the engine and allow to cool before refuelling or  
storing the unit.  
Allow the engine to cool; empty the fuel tank and secure  
the unit from moving before transporting in a vehicle.  
SPECIFIC SAFETY RULES FOR TRIMMER USE  
Replace string head if cracked, chipped or damaged in  
any way. Be sure the string head or blade is properly  
installed and securely fastened. Failure to do so may  
cause serious injury.  
Never cut any material over 13 mm (1/2 in) diameter.  
Always wear the shoulder strap when using the  
brushcutter and adjust to a comfortable operating  
position. Maintain a firm grip on both handles while  
cutting with a blade. Keep the blade away from body and  
below waist. Never use the brushcutter with the blade  
located 76 cm (30 in) or more above the ground level.  
Make sure all guards, straps, deflectors and handles are  
properly and securely attached.  
Use only the manufacturer’s replacement string in the  
cutting head. Do not use any other cutting attachment.  
Never operate unit without the grass deflector in place  
Cover the blade with the blade protector before storing  
the unit or during transport. Always remove the blade  
protector before using the unit. If not removed, the blade  
protector could become a thrown object as the blade  
begins to turn.  
and in good condition.  
Maintain a firm grip on both handles while trimming. Keep  
string head below waist level. Never cut with the string  
head located over 76 cm (30 in) or more above  
the ground.  
3
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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  
Safety Alert Symbol  
Indicates danger, warning or caution. It means  
attention!!! Your safety is involved.  
ReadYourOperator’sManual  
Weareyeandhearingprotection  
Your manual contains special messages to bring  
attention to potential safety concerns as well as  
operating and servicing information. Please read all  
the information carefully to ensure satisfaction and  
safe use.  
Wear eye and hearing protection when operating this  
equipment.  
Keep bystanders away  
Ricochet  
Keep all bystanders at least 15 m (50 ft) away.  
Danger of Ricochet.  
Tri-Arcblade  
Tri-Arc blade is appropriate for this unit and is suited  
for cutting pulpy weeds and vines.  
Do not use toothed blade  
This unit is not intended for use with a toothed saw  
type blade.  
RPM Decal  
Boots  
Rotational direction and maximum speed of the shaft  
for the cutting attachment.  
10,000/min-1  
Wear non-slip safety footwear when using this  
equipment.  
Gloves  
Wear non-slip, heavy-duty gloves.  
NoSmoking  
Do not smoke when mixing fuel or filling fuel tank.  
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 before  
refuelling.  
4
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SYMBOLS  
SYMBOL  
NAME  
EXPLANATION  
Switch  
On/Off Switch  
I = ON to Run  
O = OFF to Stop  
The purpose of safety symbols is to attract your attention to possible dangers. The safety symbols and the explanations  
with them deserve your careful attention and understanding. The safety warnings do not by themselves eliminate any  
danger. The instructions or warnings they give are not substitutes for proper accident prevention measures.  
SYMBOL  
MEANING  
DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in death or  
serious injury.  
WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in  
serious injury.  
CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor or  
moderate injury. It may also be used to alert against unsafe practices that may cause property damage.  
NOTE:  
Advises you of information or instructions vital to the operation or maintenance of the equipment.  
SAVE THESE INSTRUCTIONS  
TECHNICAL DATA  
Weight  
Without fuel, cutting attachment .......................................................................................................... 6.03 Kg  
With blade ........................................................................................................................................... 6.35 Kg  
With string head .................................................................................................................................. 6.22 Kg  
Fuel tank volume ................................................................................................................................................... 42.5 cm3  
Cutting swath.......................................................................................................................................................... 457 mm  
Enginedisplacement ................................................................................................................................................ 30 cm3  
Maximum engine performance (in accordance with ISO 8893) ............................................................................... 0.78 kW  
Maximum rotational frequency of the spindle ...................................................................................................10,000/min-1  
Engine Speed (rotational frequency) at recommended max. spindle rotational frequency .................................12,500/min-1  
Engine speed (rotational frequency) at idle .............................................................................................2,000 - 2,500/min-1  
Fuel consumption (in accordance with ISO 8893) at max. engine performance ................................................... 0.52 kg/h  
Specific fuel consumption (in accordance with ISO 8893) at max. engine performance ...................................... 0.47 kg/h  
Vibration level idling  
LeftHandle ........................................................................................................................... 6.0  
RightHandle ......................................................................................................................... 7.8  
LeftHandle ........................................................................................................................... 5.1  
RightHandle ......................................................................................................................... 6.0  
Vibration level racing  
Sound pressure level (in accordance with EN ISO 11806:1997, ISO 7917:1987) ............................................................ 99  
Sound power level (in accordance with ISO 10884) ....................................................................................................... 112  
5
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UNPACKING  
INSTRUCTIONS  
PACKING LIST FOR OWNER’S KIT  
Carefully remove the product from the carton.  
Grass deflector  
Inspect the product to make sure no breakage or  
Bladeguard  
damageoccurredduringcarriage.  
Tri-Arcblade  
Do not discard the packing material until you have  
Shoulderstrap  
inspected and operated the product.  
Silencer guard, torque wrench and screws  
Holdingpin  
Spanners - 13 mm (1/2 in) and 16 mm (5/8 in)  
Fixings  
Operator’smanual  
FEATURES  
CUTTING  
LINE  
ENGINE HOUSING  
IGNITION SWITCH  
GRASS  
DEFLECTOR  
TRIGGER HANDLE  
THROTTLE  
INTERLOCK  
STARTER GRIP  
THROTTLE  
TRIGGER  
LINE CUT-OFF  
BLADE  
STRAP HANGER  
SHAFT  
GEAR HEAD  
LEFT HANDLE  
SHOULDER  
STRAP  
BLADE GUARD  
TRI-ARC BLADE  
Fig. 1  
6
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ASSEMBLY  
HANDLE  
See Figure 2.  
1. Place the handlebar in the bottom clamp located on the  
shaft housing.  
NOTE: The throttle trigger must be mounted to the  
operator’s right side.  
BOTTOM  
CLAMP  
THROTTLE  
TRIGGER  
2. Insert the square tab of top clamp into the mounting hole  
of the bottom clamp.  
3. Adjust the handlebar for best operator control in a  
comfortableuprightposition.  
TOP CLAMP  
4. Install the knob and tighten securely.  
HANDLE BAR  
BOTTOM  
CLAMP  
THROTTLE  
TRIGGER  
TOP CLAMP  
KNOB  
BOTTOM  
CLAMP  
THROTTLE  
TRIGGER  
TOP CLAMP  
Fig. 2  
7
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ASSEMBLY  
ATTACHING THE SHOULDER STRAP  
See Figure 3.  
REAR HOUSING  
1. Connect the latch on the shoulder strap to the  
straphanger.  
TORQUE  
WRENCH  
2. Adjust the strap to a comfortable position.  
NOTE: To quickly release the product from the shoulder  
strap, sharply pull the quick release tab.  
SCREWS  
SILENCER  
GUARD  
SHOULDER  
STRAP  
QUICK  
RELEASE  
TAB  
BENT END OF  
SILENCER GUARD  
LATCH  
OPENING IN REAR  
HOUSING  
Fig. 4  
STRAP HANGER  
GRASS DEFLECTOR AND BLADE GUARD  
USE  
Fig. 3  
NOTE: When converting from brushcutter to trimmer, or  
trimmer to brushcutter, make sure the correct guard/  
deflector is being used. See Figure 5.  
SILENCER GUARD ASSEMBLY  
See Figure 4.  
1. Remove silencer guard and two screws from the  
owner’s kit.  
GRASS DEFLECTOR FOR  
TRIMMER USE  
2. Attach the silencer guard to the rear housing.  
NOTE: Make sure the bent end of the silencer guard fits  
securely into the opening of the rear housing.  
3. Using the torque wrench supplied, install the two screws  
and tighten securely.  
BLADE GUARD FOR  
BRUSHCUTTER USE  
Fig. 5  
8
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ASSEMBLY  
BLADE GUARD  
FOUR SCREWS  
MOUNTING CLAMP  
See Figure 6.  
1. Attach the blade guard to the mounting bracket; install  
the four screws (10-24 x 3/4 in) from the top of the  
mounting bracket through the blade guard and into the  
threadedmountingplates.  
2. Using the torque wrench supplied, tighten all four screws  
securely.  
BLADE GUARD  
NOTE: When using the string head, the string shield must  
be attached to blade guard.  
NOTCHES  
GRASS DEFLECTOR  
See Figure 6.  
1. Attach the grass deflector to the blade guard by placing  
the three locking tabs into the three notches.  
LOCKING  
TABS  
2. Snap the blade guard and grass deflector together to lock  
into place.  
THREADED  
MOUNTING PLATES  
WARNING:  
Always stop the engine and remove the sparking  
plug wire before making any adjustments such as  
changing cutting heads; this is to reduce the risk of  
serious personal injury.  
GRASS DEFLECTOR  
Fig. 6  
CONVERTING FROM TRIMMER TO  
BRUSHCUTTER  
REMOVING THE STRING HEAD  
See Figure 7.  
1. Align the slot in the upper flange washer with the hole in  
the gear head. Place the holding pin through the slot in  
the upper flange washer and the hole in the gear head.  
Turn the spool retainer clockwise to remove. Remove the  
spool and string head from the drive connector.  
UPPER FLANGE  
WASHER  
2. Place the holding pin through the upper flange washer  
and the gear head. Using the 16 mm (5/8 in) spanner  
supplied, turn the drive connector clockwise to remove.  
GRASS  
DEFLECTOR  
3. Remove the upper flange washer from the gear shaft and  
retain for blade installation.  
SPANNER  
(16 mm)  
4. Remove the grass deflector by pushing in on the three  
locking tabs while pulling on the grass deflector to  
separate from the blade guard.  
HOLDING PIN  
NOTE: Store the string head parts together for later use.  
DRIVE CONNECTOR  
SPOOL RETAINER  
STRING HEAD  
Fig. 7  
9
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ASSEMBLY  
INSTALLING THE BLADE  
See Figure 8.  
GEAR  
HEAD  
1. Place the upper flange washer over the gear shaft with  
the hollow side toward the blade guard.  
2. Centre the blade on the upper flange, making sure the  
blade sits flat. Install the cupped washer with the raised  
centre away from the blade. Install the blade nut. The  
blade turns anticlockwise from the operator’s position.  
BLADE  
GUARD  
3. Place the holding pin through the slot in the upper flange  
washer and the hole in the gear head. Using the 13 mm  
(1/2 in) spanner supplied, turn the blade nut  
anticlockwise.  
UPPER FLANGE  
WASHER  
4. Tighten nut securely.  
BLADE  
HOLDING PIN  
CONVERTING FROM BRUSHCUTTER TO  
TRIMMER  
SPANNER  
(13 mm)  
REMOVING THE BLADE  
CUPPED  
See Figure 8.  
WASHER  
1. Place the holding pin through the slot in the upper flange  
washer and the gear head.Turn the blade nut clockwise  
to remove.  
Fig. 8  
BLADE NUT  
2. Remove the cupped washer and the blade.  
3. Remove the upper flange washer from the gear shaft and  
retain for the string head installation.  
4. Attach the grass deflector to the blade guard by placing  
the three locking tabs into the three notches.  
5. Snap the blade guard and grass deflector together to  
lock into place.  
NOTE: Store the brushcutter parts together for later use.  
INSTALLING THE STRING HEAD  
See Figure 7.  
1. Install the upper flange washer onto the gear shaft with  
the hollow side toward the gear head.  
2. Place the holding pin through the slot in the upper flange  
washer and the hole in the gear head. Using the 16 mm  
(5/8 in) spanner supplied, turn the drive connector  
anticlockwise to install. Tighten securely.  
3. Place the string head on the drive connector.  
4. Place the holding pin through the slot in the upper flange  
washer and the hole in the gear head. Install the spool  
retainer and turn anticlockwise to tighten securely.  
10  
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OPERATION  
4. Prior to replacing the fuel cap, clean and inspect  
FUEL AND REFUELLING  
the gasket.  
HANDLING THE FUEL SAFELY  
5. Immediately replace fuel cap and hand tighten. Wipe up  
any fuel spillage. Move 9 m (30 ft) away from refuelling  
site before starting engine.  
Always handle fuel with care. It is highly flammable.  
Always refuel outdoors where there are no sparks and  
flames. Do not inhale fuel vapour.  
NOTE: It is normal for smoke to be emitted from a new  
engine during and after first use.  
Do not let petrol or oil come in contact with your skin.  
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.  
WARNING:  
Always shut off engine before refuelling. Never add  
fuel to a machine with a running or hot engine. Move  
at least 9 m (30 ft) from refuelling site before starting  
engine. Do not smoke!  
Clean up spilled fuel immediately.  
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.  
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.  
1 Litre  
+
+
+
+
+
20 ml  
40 ml  
60 ml  
80 ml  
100 ml  
=
=
=
=
=
2 Litres  
3 Litres  
4 Litres  
5 Litres  
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.  
50:1  
}
Use a high quality 2-cycle self-mixing oil for air-cooled  
engines. Do not use motor vehicle oil or 2-cycle  
outboardoil.  
OPERATING THE TRIMMER  
Mix 2% oil into the petrol. This is a 50:1 ratio.  
Hold the trimmer/brushcutter with the right hand on the  
trigger handle and the left hand on the left handle. Keep a  
firm grip with both hands while in operation.Trimmer should  
be held at a comfortable position with the trigger handle  
about hip height. See Figure 9.  
Mix the fuel thoroughly and also each time before  
refuelling.  
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.  
Always operate trimmer at full throttle. Cut tall grass from  
the top down.This will prevent grass from wrapping round  
the shaft housing and string head, which may cause  
damage from overheating. If grass becomes wrapped round  
the string head, stop the engine, disconnect the sparking  
plug wire, and remove the grass. Prolonged cutting at partial  
throttle will result in oil dripping from the silencer.  
FILLING THE TANK  
1. Clean surface round fuel cap to prevent contamination.  
2. Loosen fuel cap slowly to release pressure and to keep  
fuel from escaping around the cap.  
3. Carefully pour fuel mixture into the tank. Avoid spillage.  
11  
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OPERATION  
CUTTING TIPS  
See Figure 10.  
Keep sthe trimmer tilted toward the area being cut; this  
is the best cutting area.  
Do not cut in dangerous cutting area.  
Use the tip of string to do the cutting; do not force string  
head into uncut grass.  
Wire and picket fences cause extra string wear, even  
breakage. Stone and brick walls, kerbs and wood may  
wear string rapidly.  
Avoid trees and shrubs. Tree bark, wood mouldings,  
cladding and fence posts can easily be damaged by  
the string.  
DANGEROUS  
CUTTING AREA  
Fig. 9  
ADVANCING THE STRING  
ADVANCING STRING USING THE EZ LINE™ TAP  
ADVANCE SYSTEM  
BEST CUTTING  
DIRECTION OF  
AREA  
Fig. 10  
ROTATION  
String advance is controlled by tapping string head on grass  
while running engine at full throttle.  
1. Run engine at full throttle.  
GRASS DEFLECTOR LINE TRIMMING CUT-  
OFF BLADE  
See Figure 11.  
2. Tap string head on ground to advance string. String  
advances each time the head is tapped.  
3. Several taps may be required until string strikes the cut-  
off blade.  
This trimmer is equipped with a line trimming cut-off blade  
on the grass deflector. For best cutting, advance string until  
it is trimmed to length by the cut-off blade. Advance string  
whenever you hear the engine running faster than normal.  
This will maintain best performance and keep string long  
enough to advance properly.  
4. Resumetrimming.  
NOTE: If the string is worn too short you may not be able to  
advance the string by tapping it on the ground. If so, STOP  
THE ENGINE, and manually advance the string.  
ADVANCING THE STRING MANUALLY  
Push the spool retainer down while pulling on string(s) to  
manually advance the string.  
Fig. 11  
12  
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OPERATION  
OPERATING THE BRUSHCUTTER  
Hold the brushcutter with the right hand on the trigger  
handle and the left hand on the left handle. Keep a firm grip  
with both hands while in operation. Brushcutter should be  
held at a comfortable position with the trigger handle about  
hip height. Maintain your grip and balance on both feet.  
Position yourself so that you will not be drawn off balance  
by the kick-back reaction of the cutting blade.  
APPROACH THE WEEDS  
BEING CUT FROM THE RIGHT.  
THE WEEDS WILL BE CUT  
AGAINST THE LEFT SIDE OF  
THE BLADE GUARD.  
Adjust the shoulder strap to position the brushcutter at a  
comfortable operating position and to assure that the  
shoulder strap will reduce the risk of operator contact with  
the blade. See Figure 12.  
Fig. 13  
TRI-ARC BLADE  
The TRI-ARC blade is suited only for pulpy weeds and  
vines. When the blade becomes dull, it can be turned over  
to extend the life of the blade. Do not sharpen the TRI-ARC  
blade.  
Use onlyTRI-ARC blade, part number 984227001, available  
at your local retailer.  
CUTTING TECHNIQUE - BLADE  
WARNING:  
Extreme care must be taken when using blades to  
insure safe operation. Read the safety information for  
safe operation using the blade, refer to “Specific  
Safety Rules for Brushcutter and Blade Use” earlier in  
this manual.  
Always hold brushcutter with both hands when operating.  
Use a firm grip on both handles.  
Maintain your grip and balance on both feet. Position  
yourself so that you will not be drawn off balance by the  
kick-back reaction of the cutting blade.  
Fig. 12  
Inspect and clear the area of any hidden objects such as  
glass, stones, concrete, fencing, wire, wood, metal etc.  
Exercise extreme caution when using the blade with this  
unit. Blade thrust is the reaction which may occur when the  
spinning blade contacts anything it cannot cut.This contact  
may cause the blade to stop for an instant, and suddenly  
“thrust” the unit away from the object that was hit.This  
reaction can be violent enough to cause the operator to  
lose control of the unit. Blade thrust may occur without  
warning if the blade snags, stalls or binds.This is more  
likely to occur in areas where it is difficult to see the  
material being cut. For cutting ease and safety, approach  
the weeds being cut from the right to the left. In the event  
an unexpected object or woody stock is encountered, this  
could minimise the blade thrust reaction. See Figure 13.  
Never use blades near footpaths, fencing, posts,  
buildings or other immovable objects.  
Never use a blade after hitting a hard object without first  
inspecting it for damage. Do not use if any damage  
is detected.  
The unit is used as a scythe, cutting from the right to the  
left in a broad sweeping action from side to side.  
13  
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OPERATION  
STARTING AND STOPPING  
See Figures 14 and 15.  
NOTE: The unit is equipped with an automatic choke feature.  
Thestartinginstructionsforthisfeaturearedifferentfromunits  
with a manual choke. Be sure to read and follow the starting  
instructionsbelow.  
INTERLOCK  
IGNITION SWITCH  
= ON TO RUN  
O = OFF TO STOP  
I
WARNING:  
Never start or run the engine inside a closed or poorly  
ventilated area; breathing exhaust fumes can kill.  
THROTTLE  
TRIGGER  
TO START A COLD ENGINE:  
1. Lay trimmer on a flat, bare surface.  
2. Push primer bulb 8 to 10 times.  
NOTE: Do not squeeze the throttle trigger before engine  
starts. Squeezing the throttle trigger at this time will prevent  
the unit from starting.  
Fig. 14  
3. Move the lever to the “COLD START” position. See  
Figure15.  
4. Pull the starter rope until engine runs.  
PRIMER BULB  
5. Allow the engine to warm up for 4-10 seconds.  
6. Depress the interlock, then squeeze and release the  
throttle trigger. This allows the choke to automatically  
set to the “WARM START” position. Your unit is now  
ready for use.  
NOTE: The lever will automatically set to the “WARM  
START” position after the throttle trigger is squeezed for  
the first time.  
WARM START  
POSITION  
TO START A WARM ENGINE:  
1. Lay trimmer on a flat, bare surface.  
2. Choke lever should already be in the “WARM START”  
position. If not, squeeze and release throttle trigger.  
Pull the starter rope until unit runs.  
TO STOP THE ENGINE:  
COLD START  
POSITION  
To stop the engine, depress the switch to the “O” position.  
Fig. 15  
LEVER  
14  
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MAINTENANCE  
6. Make sure the string head and the spool retainer are  
WARNING:  
installed on the shaft by turning the retainer  
anticlockwise to tighten.  
Use only original manufacturer’s replacement parts,  
accessories and attachments. Failure to do so can  
cause possible injury, poor performance and may  
void your warranty.  
7. Pull the strings again to rotate the spool into cutting  
position. Push the spool retainer down while pulling on  
string(s) to manually advance the string and to check for  
proper assembly of the string head.  
You may make adjustments and repairs described here.  
For other repairs, have the trimmer serviced by an  
authorisedservicingdealer.  
Consequencesofimpropermaintenancemayinclude  
excess carbon deposits resulting in loss of performance  
and discharge of black oily residue dripping from  
the silencer.  
Make sure all guards, straps, deflectors and handles are  
properly and securely attached to avoid the risk of  
personal injury.  
SPOOL  
RETAINER  
SPOOL REPLACEMENT  
EZ LINE™ TAP ADVANCE SYSTEM  
NEW PRE-WOUND SPOOL  
Fig. 16  
See Figures 16 and 17.  
If replacing string only, refer to “String Replacement” later in  
this manual.  
SPRING  
Use only 2.4 mm (0.095 in) diameter monofilament string.  
Use the manufacturer’s replacement string for best perfor-  
mance.  
SPOOL  
SLOTS  
1. Stop the engine and disconnect the sparking plug wire.  
Hold the string head and unscrew the spool retainer.  
Turn clockwise.  
2. Remove the empty spool from the string head. Keep the  
spring attached to the spool.  
STRING HEAD  
3. To install the new spool, make sure the two strings are  
captured in the slots opposite each other on the new  
spool. Make sure the ends of each string is extended  
approximately 152 mm (6 in) beyond each slot.  
EYELETS  
SHAFT  
4. Thread the strings into the eyelets in the string head.  
Carefully push the spool into the string head (gently pull  
the strings to the outside if necessary). When the spool  
is positioned in the string head, grasp the strings and  
pull sharply to release them from the slots in the spool.  
EYELETS  
Fig. 17  
5. Push down and turn the spool anticlockwise until it no  
longer turns. Hold the spool down and rotate clockwise a  
small amount. Release the spool. The spool should be  
locked down in the string head. If not, hold down and  
rotate until locked.  
15  
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MAINTENANCE  
STRING REPLACEMENT  
See Figures 18, 19, 20 and 21.  
1. Stop the engine, disconnect the sparking plug wire.  
Hold the string head and unscrew the spool retainer.  
Turn clockwise.  
2. Remove the spool from the string head. NOTE:  
Keep the spring attached to the spool. Remove any  
old string remaining on the spool.  
SECOND  
STRING  
3. Cut two pieces of string, each being approximately  
2.7 m (9 ft) long.  
4. Insert the first string into the anchor hole in the  
upper part of the spool. Wind the first string round  
the upper part of the spool anticlockwise, as shown  
by the arrows on the spool. Place string in the slot  
on upper spool flange, leaving about 152 mm (6 in)  
extended beyond the slot. Do not overfill. After  
winding the string, there should be at least 6 mm  
(1/4 in) between the wound string and the outside  
edge of the spool.  
Fig. 20  
SLOT  
ARROWS ON  
SPOOL  
5. Repeat above step with second string, using the  
bottom part of spool. Do not overfill.  
6. Replace the spool and the spool retainer. Refer to  
“Spool Replacement “ earlier in this manual.  
Fig. 21  
BLADE PROTECTOR  
See Figures 22.  
SPOOL  
SPRING  
Always place the blade protector on the blade when the unit  
is not in use.The blade protector has clips round the edges  
to snap over the blade and keep it in place. Wear gloves and  
be cautious when handling the blade.  
ARROWS ON  
SPOOL  
NOTE: Always remove the blade protector before using the  
unit. If not removed, the blade protector could become a  
thrown object as the blade begins to turn.  
ANCHOR  
HOLE  
FIRST STRING  
Fig. 18  
FIRST STRING  
SLOT  
BLADE  
BLADE  
PROTECTOR  
CLIPS  
Fig. 22  
Fig. 19  
16  
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MAINTENANCE  
CLEANING THE EXHAUST PORT AND  
SILENCER  
LATCH  
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, a  
qualified service technician will need to remove these  
deposits to restore performance.  
PULL COVER  
TO OPEN  
SPARK ARRESTER  
The spark arrester must be cleaned or replaced every  
25 hours or yearly to ensure proper performance of your  
product. Spark arresters may be in different locations  
depending on the model purchased. Please contact your  
nearest service dealer for the location of the spark arrester  
for your model.  
Fig. 23  
Cleaning Instructions:  
Remove the spark arrester from the silencer.  
If your spark arrester is made of fibreglass, discard  
andreplace.  
If your spark arrester is made of metal, follow these  
FILTER  
cleaning instructions:  
1. Spray the spark arrester with a quality  
carboncleaner.  
2. Gently clean using a wire brush.  
3. Install the new or cleaned spark arrester and reas-  
semble completely before use.  
REPLACING AND CLEANING AIR FILTER  
See Figures 23 and 24.  
For proper performance and long life, keep air filter clean.  
SLOTS ON AIR  
FILTER BASE  
1. Remove the air filter cover by pushing down on the latch  
with your thumb while gently pulling on the cover.  
2. Remove the filter and clean it in warm soapy water.  
Rinse and let dry completely. For best performance,  
replaceannually.  
TABS ON AIR  
FILTER COVER  
3. Reinstall the filter.  
4. Replace the air filter cover by inserting the tabs on the  
bottom of the cover into the slots on the air filter base;  
push the cover up until it latches securely in place.  
Fig. 24  
17  
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MAINTENANCE  
FUEL CAP  
STORAGE (1 MONTH OR LONGER)  
1. Drain all fuel from tank into a container approved for  
petrol. Run engine until it stops.  
WARNING:  
A leaking fuel cap is a fire hazard and must be  
replaced immediately.  
2. Clean all foreign material from the trimmer. Store it in a  
well-ventilated place that is inaccessible to children.  
Keep away from corrosive agents such as garden  
chemicals and de-icing salts.  
3. Cover the blade with the blade protector before storing  
the unit or during transport.  
The fuel cap contains a non-serviceable filter and a check  
valve. A clogged fuel filter will cause poor engine perfor-  
mance. If performance improves when the fuel cap is  
loosened, the check valve may be faulty or the filter  
clogged. Replace fuel cap if required.  
4. Abide by all ISO and local regulations for the safe  
storage and handling of petrol. Excess fuel should be  
usedupinother2-cycleengine-poweredequipment.  
SPARKING PLUG  
This engine uses a Champion RCJ-6Y with 0.63 mm  
(0.025 in) electrode gap.Use an exact replacement and  
replace annually.  
18  
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TROUBLESHOOTING  
IFTHESE SOLUTIONS DO NOT SOLVETHE PROBLEM, CONTACTYOUR AUTHORISED SERVICE DEALER.  
PROBLEM  
POSSIBLE CAUSE  
SOLUTION  
Engine will not start:  
1. No spark.  
1. Check spark. Remove sparking plug. Reattach  
the sparking plug cap and lay sparking plug on  
metal 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. Push primer bulb until bulb is full of fuel. If bulb  
does not fill, primary fuel delivery system is  
blocked.Contact a servicing dealer. If primer  
bulb fills, engine may be flooded (see  
2. No fuel.  
next item).  
3. Flooded engine.  
3. Remove sparking plug, turn trimmer so spark-  
ing plug hole is aimed at the ground. Make sure  
lever is in the “WARM START” position and pull  
starter cord 10 to 14 times.This will clear  
excess fuel from engine. Clean and reinstall  
sparking plug.With the throttle trigger fully  
depressed, pull starter cord three times with  
lever at “WARM START” position. If engine  
does not start, move choke lever to “COLD  
STARTand follow normal starting instructions  
in “STARTING AND STOPPING” section. If  
engine still fails to start, repeat procedure with  
a new sparking plug.  
4. Starter rope pulls harder now than  
when new.  
4. Contact a servicing dealer.  
Lever will not go into the  
“COLD START” position:  
Throttle trigger is depressed.  
Release throttle trigger.Refer to “Starting and  
Stopping” earlier in this manual.  
Engine starts but will not  
accelerate:  
*Turn “L” needle anticlockwise 1/16 turn. If L” low  
needlecannotbeturnedanticlockwise,donotforce  
plastic limiter caps. Contact a servicing dealer.  
See Figure 25.  
Carburettorrequiresadjustment.  
Engine does not reach full  
speed and emits excessive  
smoke:  
1. Use fresh fuel and the correct 2-cycle oil mix.  
2. Cleanairfilter. RefertoReplacingandCleaning  
Air Filter” earlier in this manual.  
1. Check oil fuel mixture.  
2. Air filter dirty.  
3. Turn H” needle clockwise 1/16 - 1/8 turn.  
See Figure 25.  
3.Carburettorrequiresadjustment.  
Carburettorrequiresadjustment.  
Engine starts, runs, and ac-  
celerates but will not idle:  
Turn idle speed screw clockwise to increase  
idle speed. See Figure 25.  
Blade continues to rotate at  
idle speed:  
Turn idle speed screw anticlockwise to reduce  
idle speed. See Figure 25. If after adjustment,  
blade continues to rotate, return to an authorised  
servicing dealer for repair.  
Carburettorrequiresadjustment.  
19  
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TROUBLESHOOTING  
IFTHESE SOLUTIONS DO NOT SOLVETHE PROBLEM, CONTACTYOUR AUTHORISED SERVICE DEALER.  
PROBLEM  
POSSIBLE CAUSE  
SOLUTION  
String will not advance:  
1. String welded to itself.  
1. Lubricate with silicone spray.  
2. Not enough string on spool.  
2. Install more string. Refer to “String Replacement”  
earlier in this manual.  
3. String worn too short.  
4. String tangled on spool.  
5. Engine speed too slow.  
3. Pull strings while alternately pressing down on and  
releasingspoolretainer.  
4. Remove string from spool and rewind. Refer to “String  
Replacement” earlier in this manual.  
5. Advance string at full throttle.  
Grass wraps round shaft  
housing and string head:  
1. Cutting tall grass at ground  
level.  
2. Operating trimmer at part  
throttle.  
1. Cut tall grass from the top down.  
2. Operate trimmer at full throttle.  
Spool retainer hard to  
turn:  
Screw threads dirty or damaged.  
Clean threads and lubricate with grease - if no improve-  
ment, replace spool retainer.  
1. Operating trimmer at part  
throttle.  
1. Operate trimmer at full throttle.  
Oil drips from silencer:  
2. Check oil/fuel mixture.  
3. Air filter dirty.  
2. Use fresh fuel and the correct 2-cycle oil mix.  
3. Clean per instruction in Maintenance Section.  
4. Carburettorrequiresadjust-  
ment.  
4. Turn Hneedle clockwise 1/16 - 1/8 turn.See Figure 25.  
NOTE:The carburettor adjustment needle(s) are equipped with  
plastic cap(s) which prevent anticlockwise rotation from the  
original factory adjustment. If your unit exhibits specific  
performance problem(s) where theTroubleshooting Section  
recommends an anticlockwise needle adjustment and no  
adjustments have been made since original purchase, the unit  
should be taken to a factory-authorised service dealer for  
repair. In most cases, the needed adjustment is a simple task  
for the factory-trained service representative.  
IDLE SPEED  
SCREW  
“L” LO  
NEEDLE  
“H” HIGH  
NEEDLE  
Fig. 25  
20  
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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, D-40724 Hilden, Germany  
RyobiTechnologies, Customer Services, Anvil House, Tuns Lane, Henley-on-Thames, RG9 1SA, UK  
RyobiTechnologies, BP 50012 - 95945 Roissy CDG Cedex – FRANCE  
RyobiTechnologies Australia PTY Limited, 359-361 Horsley Road, Milperra, NSW 2214 Australia  
SAFETY DIRECTIVE  
SOUND POWER/PRESSURE AND HANDLE VIBRATION CHART FOR STRING TRIMMERS /  
BRUSHCUTTERS  
Information on Noise Emission per European Machine Safety Directive 98/37/EC.  
The individual equipment listed was operated in a manner consistent with normal working conditions.  
The A-weighted sound pressure level (LpA) at the operator’s ear and the A-weighted sound power level (LWA) were both measured  
in accordance with Directive 79/113/EEC. Hearing protection is recommended where levels exceed 85 dBA.  
Handle vibration was measured in accordance to ISO 7916. Read the safety precautions section of the manual.  
SOUNDPRESSURE  
LpA(dBA)  
SOUNDPOWER  
LwA(dBpA)  
VIBRATION  
m/s2  
MODEL  
MODELNO.  
PBC3046B  
RY70107A  
99  
112  
6.0  
EC DECLARATION OF CONFORMITY  
According to machinery directive 98/37/EC and EMC directive 89/336/EEC - We,  
Ryobi Technologies Inc., 1428 Pearman Dairy Road, Anderson, SC 29625, USA  
declare in sole responsibility that the product: PBC3046B (RY70107A) - 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.  
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: EN ISO 14982:1998, ISO 7916 & 7917, EN ISO 11806:1997, ISO  
7918-1995, ISO 8380-1993, ISO 8893-1989, ISO 10884-1995. EN 292-1.1991, EN 292-2-1991, EN 292-2:1991/A1;1995, EN  
563-1994, EN 27917-1991, ISO 7112-1982, ISO 7113-1991  
Wayne Hill  
Director, Environmental Compliance  
Ryobi Technologies Inc.  
1428 Pearman Dairy Road  
Anderson, SC 29625, USA  
December 21, 2002  
21  
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OPERATOR’S MANUAL  
Trimmer / Brushcutter  
PBC3046B  
RY70107A  
RyobiTechnologies GmbH  
Itterpark 7  
D-40724 Hilden  
Germany  
Tel.: +49 (0)2103 / 29 58 0  
Fax : +49 (0)2103 / 29 58 29  
RyobiTechnologies  
Customer Services  
Anvil House  
Tuns Lane  
Henley-on-Thames  
RG9 1SA  
UK  
RyobiTechnologies  
BP 50012 - 95945 Roissy CDG Cedex – FRANCE  
RyobiTechnologies Australia PTY Limited  
359-361 Horsley Road, Milperra, NSW 2214 Australia  
983000-323  
6-03  
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