Ryobi RY30971, RY30931, RY30951, RY30570 User Manual
OPERATOR’S MANUAL
30cc String Trimmers and Brushcutters
SS30
CS30
RY30530
RY30931
RY30550
RY30951
BC30
RY30570
RY30971
Your new trimmer or brushcutter has been engineered and manufactured to our high standard for dependability, ease of
operation, and operator safety. Properly cared for, it will give you years of rugged, trouble-free performance.
WARNING: To reduce the risk of injury, the user must read and understand the operator’s manual before
using this product.
Thank you for your purchase.
SAVE THIS MANUAL FOR FUTURE REFERENCE
TABLE OF CONTENTS
Introduction ..................................................................................................................................................................... 2
General Safety Rules ....................................................................................................................................................... 3
Specific Safety Rules ...................................................................................................................................................... 4
Symbols .......................................................................................................................................................................5-6
Features .......................................................................................................................................................................7-9
Assembly ..................................................................................................................................................................10-15
Operation ..................................................................................................................................................................16-20
Maintenance .............................................................................................................................................................21-24
Troubleshooting ........................................................................................................................................................25-26
Warranty ................................................................................................................................................................... 26-28
Service Parts ....................................................................................................................................................Back Page
INTRODUCTION
This product has many features for making its use more pleasant and enjoyable. Safety, performance, and dependability
have been given top priority in the design of this product making it easy to maintain and operate.
2
GENERAL SAFETY RULES
WARNING:
Read and understand all instructions. Failure to follow all
instructions listed below may result in electric shock, fire
and/or serious personal injury.
READ ALL INSTRUCTIONS
For safe operation, read and understand all instructions
before using this product. Follow all safety instructions.
Failure to follow all safety instructions listed below, can
result in serious personal injury.
Do not allow children or untrained individuals to use this
unit.
Never start or run the engine in a closed or poorly venti-
lated 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, sandals, or go barefoot.
Do not wear jewelry of any kind.
Heavy protective clothing may increase operator fatigue,
which could lead to heat stroke. During weather that is
hot and humid, heavy work should be scheduled for early
morning or late afternoon hours when temperatures are
cooler.
Product users on United States Forest Service land, and in
some states, must comply with fire prevention regulations.
This product is equipped with a spark arrestor; however,
other user requirements may apply. Check with your
federal, state, or local authorities.
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
50 ft. away. Bystanders should be encouraged to wear
eye protection. If you are approached, stop the engine
and cutting attachment. In the case of bladed units, there
is the added risk of injury to bystanders from being struck
with the moving blade in the event of a blade thrust or
other unexpected reaction of the saw.
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.
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 cutting attachment should never rotate at idle during
normal use. The cutting attachment may rotate at idle
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. 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 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 oper-
ating 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 30 ft. away from refueling
site before starting engine. Slowly remove the fuel cap
after stopping engine. Do not smoke when refueling.
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.
Wear your protective equipment and observe all safety
instructions. For units equipped with a clutch, be sure
the cutting attachment stops turning when the engine
idles. When the unit is turned off make sure the cutting
attachment has stopped before the unit is set down.
3
SPECIFIC SAFETY RULES
SPECIFIC SAFETY RULES FOR TRIMMER
USE
Inspect before use. Replace damaged parts. Make sure
fasteners are in place and secure. Check for fuel leaks.
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 replacement string or cutting
head to this string trimmer can result in serious personal
injury. Never use, for example, wire or wire-rope, which
can break off and become a dangerous projectile.
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 30 in. or more above the ground.
SPECIFIC SAFETY RULES FOR BRUSHCUTTER AND BLADE USE
After engine stops, keep rotating blade in thicker weeds
or pulpy stalks until it stops.
Do not operate the brushcutter unless the brushcutter
guard is firmly secured in place and in good condition.
Use heavy gloves when operating the brushcutter 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.
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 Tri-Arc® blade
intended for use on this brushcutter. Do not use any other
blade. To install any other brand blade or cutting head to
this brushcutter can result in serious personal injury.
The Tri-Arc® blade is suited for cutting thicker weeds or
pulpy stalks only. Do not use for any other purpose. Never
use the Tri-Arc® 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 1/2 in. diameter.
Always wear the shoulder harness when using the brush-
cutter 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 30 in.
or more above the ground level.
4
SYMBOLS
Some of the following symbols may be used on this product. Please study them and learn their meaning for safe
operation of this product.
SYMBOL NAME
Safety Alert Precautions that involve your safety.
EXPLANATION
Read the Operator’s Manual
Wear Eye and Hearing Protection
Keep Bystanders Away Keep all bystanders at least 50 ft. away.
Ricochet
No Blade
Blade Thrust
Gasoline and Lubricant
To reduce the risk of injury, user must read and understand operator’s manual before using this product.
Wear eye protection which is marked to comply
with ANSI Z87.1 as well as hearing protection when
operating this equipment.
Thrown objects can ricochet and result in personal injury
or property damage.
Do not install or use any type of blade on a product displaying this symbol.
Beware of blade thrust. Products authorized for blade use
will display this symbol to warn of blade thrust.
Use unleaded gasoline intended for motor vehicle use
with an octane rating of 87 [(R + M) / 2] or higher. This
product is powered by a 2-cycle engine and requires
pre-mixing gasoline and 2-cycle lubricant.
5
SYMBOLS
The following signal words and meanings are intended to explain the levels of risk associated with this product.
SYMBOL SIGNAL MEANING
DANGER:
WARNING:
CAUTION:
CAUTION:
Indicates an imminently hazardous situation, which, if not avoided, will result
in death or serious injury.
Indicates a potentially hazardous situation, which, if not avoided, could result
in death or serious injury.
Indicates a potentially hazardous situation, which, if not avoided, may result in
minor or moderate injury.
(Without Safety Alert Symbol) Indicates a situation that may result in property
damage.
SERVICE
Servicing requires extreme care and knowledge and should
be performed only by a qualified service technician. For
service we suggest you return the product to your nearest
AUTHORIZED SERVICE CENTER for repair. When servicing, use only identical replacement parts.
WARNING:
To avoid serious personal injury, do not attempt to use this
product until you read thoroughly and understand completely the operator’s manual. If you do not understand
the warnings and instructions in the operator’s manual,
do not use this product. Call Ryobi customer service for
assistance.
WARNING:
The operation of any power tool can result in foreign objects being thrown into your eyes, which can
result in severe eye damage. Before beginning power tool operation, always wear safety goggles or
safety glasses with side shields and, when needed, a full face shield. We recommend Wide Vision Safety
Mask for use over eyeglasses or standard safety glasses with side shields. Always use eye protection
which is marked to comply with ANSI Z87.1.
SAVE THESE INSTRUCTIONS
6
FEATURES
PRODUCT SPECIFICATIONS
Weight - (without fuel)
CS30 ..................................................................................................................................................................11.7 lbs.
SS30 ..................................................................................................................................................................12.8 lbs.
BC30 ..................................................................................................................................................................13.2 lbs.
String cutting width
CS30 .......................................................................................................................................................................17 in.
SS30 and BC30 ......................................................................................................................................................18 in.
Blade cutting width
BC30 .........................................................................................................................................................................8 in.
Engine displacement .................................................................................................................................................30cc
String diameter
Reel Easy String Head ..........................................................................................................................................095 in.
Pro Cut II String Head .................................................................................................................095 in. to .105 in. max.
CS30
DRIVE SHAFT
REEL EASY
STRING HEAD
HOUSING
HANGER
COUPLER
CURVED SHAFT
GRASS DEFLECTOR
STRAP
KNOB
ON/OFF
SWITCH
FRONT
HANDLE
STARTER
GRIP AND
ROPE
TRIGGER
LOCK
THROTTLE
TRIGGER
REAR
HANDLE
PRIMER
BULB
FUEL
CAP
Fig. 1a
7
FEATURES
SS30
REEL EASY
STRING
HEAD
DRIVE SHAFT
HOUSING
COUPLER
STRAP
HANGER
STRAIGHT SHAFT
GRASS DEFLECTOR
KNOB
TRIGGER
LOCK
FRONT
HANDLE
REAR
HANDLE
PRIMER
BULB
FUEL CAP
STARTER GRIP
AND ROPE
THROTTLE
TRIGGER
ON/OFF
SWITCH
BC30
BLADE
DRIVE SHAFT
HOUSING
COUPLER
BRUSHCUTTER
ON/OFF
SWITCH
“J” HANDLE
GUARD
KNOB
TRIGGER
LOCK
Fig. 1b
STARTER GRIP
AND ROPE
PRIMER
BULB
FUEL CAP
REAR
HANDLE
THROTTLE
TRIGGER
SHOULDER
HARNESS
Fig. 1c
8
FEATURES
REEL EASY STRING HEAD PRO CUT II STRING HEAD
Fig. 1d
KNOW YOUR STRING TRIMMER
See Figures 1a - 1d.
The safe use of this product requires an understanding of
the information on the tool and in this operator’s manual as
well as a knowledge of the project you are attempting. Before
use of this product, familiarize yourself with all operating
features and safety rules.
ERGONOMIC DESIGN
The design of the trimmer provides for easy handling. It is
designed for comfort and ease of grasp when operating in
different positions and at different angles.
GRASS DEFLECTOR
The trimmer includes a grass deflector that helps protect
you from flying debris.
TOP-MOUNTED MOTOR
The top-mounted motor improves balance and is located
away from the dust and debris of the cutting area.
9
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