Ryobi RBC-33 Operation manual

OWNER’S OPERATING MANUAL
PETROL BRUSH CUTTER
MODEL RBC-33
KEEP THIS MANUAL FOR FUTURE REFERENCE
Your new petrol brush cutter/line trimmer has been engineered and manufactured to Ryobi’s high
standard of dependability, ease of operation and operator safety. Properly cared for, it will give you
years of rugged, trouble free performance. If you use your petrol brush cutter/line trimmer properly
and only for what it is intended, you will enjoy years of safe, reliable service.
SPECIFICATIONS
Engine type........................................................................................2-stroke, air-cooled
Engine displacement................................................................................................ 33 cc
Engine max. speed......................................................................................... 10500min-1
Engine idle speed...................................................................................3000+/-300min-1
Clutch speed.................................................................................................... 4200min-1
Fuel tank capacity................................................................................................... 800ml
Fuel type................................................................ 25:1 of unleaded petrol & 2 stroke oil
Starting system............................................................................................Recoil starter
Spark plug type.....................................................................................................L7T/LD
Cutting diameter (Brush Cutter)............................................................................25.5cm
Cutting diameter (Line Trimmer)..............................................................................43cm
Cutting line size...................................................................................... Ø2.4mm x 2.5m
Sound pressure level (Brush Cutter).......................................... LpA 99.6dB(A),k=3dB(A)
Sound pressure level (Line Trimmer)......................................... LpA 96.7dB(A),k=3dB(A)
Sound power level (Brush Cutter)............................................ LWA 111.5dB(A),k=3dB(A)
Sound power level (Line Trimmer)......................................... LWA 112.15dB(A),k=3dB(A)
Vibration level (Left handle) (Brush Cutter)...................................... 6.10m/s2, K=1.5m/s2
Vibration level (Left handle) (Line Trimmer)..................................... 5.03m/s2, K=1.5m/s2
Vibration level (Right handle) (Brush Cutter)....................................7.06m/s2, K=1.5m/s2
Vibration level (Right handle) (Line Trimmer)...................................9.73m/s2, K=1.5m/s2
Net weight................................................................................................................7.2kg
THANK YOU FOR BUYING A RYOBI
PETROL BRUSH CUTTER
CAUTION: Carefully read through this entire owner’s
manual, paying close attention to the general
safety rules and rules for safe operation,
before using.
1

2
IMPORTANT SAFETY INSTRUCTIONS
The purpose of safety rules is to attract your
attention to possible dangers. The safety symbols
and the explanations with them, require your
careful attention and understanding. The safety
warnings do not by themselves eliminate any
danger. The instruction or warnings they give are
not substitutes for proper accident prevention
measures.
SAFETY ALERT SYMBOL. Indicates
danger, caution or warning. May be used
in conjunction with other symbols or
pictures.
Failure to obey a safety warning can result in
serious injury to yourself or to others. Always follow
the safety precautions to reduce the risk of fire,
electric shock and personal injury.
Do not attempt to operate this tool until you have
read thoroughly and completely understood the
safety rules, etc. contained in this manual. Failure
to comply can result in accidents involving fire,
electric shock or serious personal injury. Save this
Owners Operating Manual and review it frequently
for continual safe operation and for instructing
others who may use this tool.
INTENDED USE
The brush cutter/line trimmer is only intended for
cutting grass, weeds, bush and other such
undergrowth, and should not be used for any other
purpose such as edging or hedge cutting as this
may cause injury.
WARNING
Do not attempt to operate this machine
until you have read thoroughly and
understood completely all instructions,
safety rules etc contained in this manual.
Failure to comply may result in accidents
involving fire, electric shock or serious
personal injury. Save operator’s manual
and review frequently for continuing safe
operation, and instructing others who
may use this tool.
WARNING
To reduce the risk of injury, the user must
read and understand the operator’s
manual.
READ ALL INSTRUCTIONS
Do not allow children or untrained individuals to
use this unit.
Never start or run the engine in a closed or poorly
ventilated area; breathing exhaust fumes can kill.
Clear the work area before each use. Remove all
objects such as rocks, broken glass, nails, wire, or
string which can be thrown or become entangled in
the cutting line or blade.
Wear safety glasses or goggles that are marked to
comply with ANSI Z87.1 standard when operating
this product.
Wear heavy, long pants, boots, and gloves. Do not
wear loose fitting clothing, short pants, or go
barefoot. Do not wear jewellery of any kind.
Never operate this unit on the operator’s left side.
Secure long hair above shoulder level to prevent
entanglement in moving parts.
Keep all bystanders, children, and pets at least
15 m (50ft.) away.
Do not operate this unit when you are tired, ill, or
under the influence of alcohol, drugs, or
medication.
Do not operate in poor lighting.
Keep firm footing and balance. Do not overreach.
Overreaching can result in loss of balance or
exposure to hot surfaces.
Keep all parts of your body away from any moving
part.
To avoid hot surfaces, never operate the unit with
the bottom of the engine above waist level.
Do not touch area around the muffler or cylinder of
the unit, these parts get hot from operation.
NOTICE
Do not use E15 or E85 fuel in this product. It is a violation of federal law and will damage the unit and
void your warranty. Only use unleaded gasoline containing up to 10% ethanol.

3
IMPORTANT SAFETY INSTRUCTIONS
Always stop the engine and remove the spark plug
wire before making any adjustments or repairs
except for carburetor adjustments.
Inspect the unit before each use for loose
fasteners, fuel leaks, etc. Replace any damaged
parts before use.
The string head or blade will rotate during
carburetor adjustments.
It has been reported that vibrations from hand-held
tools may contribute to a condition called
Raynaud’s Syndrome in certain individuals.
Symptoms may include tingling, numbness, and
blanching of the fingers, usually apparent upon
exposure to cold. ereditary factors, exposure to
cold and dampness, diet, smoking, and work
practices are all thought to contribute to the
development of these symptoms. It is presently
unknown what, if any, vibrations or extent of
exposure may contribute to the condition. There
are measures that can be taken by the operator to
possibly reduce the effects of vibration:
a) Keep your body warm in cold weather. When
operating the unit wear gloves to keep hands
and wrists warm. It is reported that cold weather
is a major factor contributing to Raynaud’s
Syndrome.
b) After each period of operation, exercise to
increase blood circulation.
c) Take frequent work breaks. Limit the amount of
exposure per day.
d) Keep the tool well maintained, fasteners
tightened, and worn parts replaced.
If you experience any of the symptoms of this
condition, immediately discontinue use and see
your physician about these symptoms.
Mix and store fuel in a container approved for
gasoline.
Mix fuel outdoors where there are no sparks or
flames.
Wipe up any fuel spillage. Move 9 m (30 ft. ) away
from refueling site before starting engine.
Stop the engine and allow to cool before refueling
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 can cause serious injury.
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.
To install any other brand of cutting head to this line
trimmer can result in serious personal injury.
Never operate unit without the grass deflector in
place 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.
SPECIFIC SAFETY RULES FOR BRUSH
CUTTER AND BLADE USE
After engine stops, keep rotating blade in thicker
weeds or pulpy stalks until it stops.
Do not operate the brush cutter unless the brush
cutter guard is firmly secured in place and in good
condition.
Use heavy gloves when operating the brush cutter
and when installing or removing blades.
Always stop the engine and remove the spark plug
wire before attempting to remove any obstruction
caught or jammed in the blade or before removing
and installing the blade.
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.

4
IMPORTANT SAFETY INSTRUCTIONS
Replace any blade that has been damaged. Always
make sure blade is installed correctly and securely
fastened before each use. Failure to do so can
cause serious injury.
Use only the manufacturer’s replacement blade
intended for use on this brush cutter. Do not use
any other blade. To install any other brand blade or
cutting head to this brush cutter can result in
serious personal injury.
The blade is suited for cutting thicker weeds or
pulpy stalks only. Do not use for any other purpose.
Never use the blade to cut woody brush.
Exercise extreme caution when using the blade
with this unit. Blade thrust is the reaction that 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 can 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 minimize
the blade thrust reaction.
Never cut any material over 13 mm (1/2 in.)
diameter.
Always wear the shoulder harness 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 your body
and below waist level.
Never use the brushcutter with the blade located
76 cm (30 in.) or more above the ground level.
FUEL SAFETY
This product requires unleaded petrol and 2-stroke
oil, ratio 25:1.
Always handle fuel with care. It is highly flammable.
Use only an approved container for fuel storage
and mixing.
Never mix petrol/ oil in the machine fuel tank.
Do not smoke, and avoid sparks and flames near
fuel or unit.
Avoid spillage of fuel or oil. Wipe up all spillages as
quickly as possible.
Mix fuel outdoors where there are no sparks or
flames.
Do not inhale fuel fumes.
Move at least 3 meters (10 feet) from refueling
position before starting the engine.
Stop the engine and allow to fully cool before
refueling or storing the machine.
Never use exposed light bulbs while refueling.
Change your clothes if you spill fuel on yourself.
Keep petrol and oil away from eyes. If petrol or oil
comes in contact with eyes, wash them
immediately with clean water. If irritation is still
present, seek immediate medical help.
TRANSPORATION, HANDLING AND STORAGE
Switch off the engine when you cross roads or
gravel paths.
Always clean and maintain before storing, pay
special attention to the guards and cutting
attachments.
Before transporting the unit in a vehicle stop the
engine and allow it to cool. Empty the fuel tank and
securely locate the unit.
When removing the tool from a vehicle or from
storage, be careful not to drop the engine on the
ground as this may severely damage the fuel tank.
Never drag the tool across the ground, or throw it
to the ground this is highly dangerous and will
damage the fuel tank, causing the fuel to leak,
possibly causing fire.
Remember when moving the equipment to lift it
entirely from the ground.

5
DESCRIPTION
1. Primer bulb
2. Air filter cover
3. Spark plug
4. Choke lever
5. Exhaust point
6. Starter handle
7. Fuel tank cap
8. U handle with controls
9. arness hook
10. U handle
11. On/Off switch
12. Safety lever
13. Throttle trigger
14. Cutting line spool
15. ex key
16. ex key
17. Spanner
18. Spark plug wrench and screwdriver
19. arness
20. Grass deflector
21. Cutting blade
22. Drive shaft
23. Clamp knob for drive shaft connection
24. Clamp
25. Fuel/Oil mixture bottle.
2
1
3
5
6
21
20
24
22
8
9
23
11 12
13
15
16
17
1819
10
14
25
7
4