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
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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
START”and 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. Referto“ReplacingandCleaning
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 “H”needle 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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