Ryobi 890r User manual

890r
4-Cycle Gas Trimmer/Brushcutter
OPERATOR’S MANUAL
FOR QUESTIONS, CALL 1-800-345-8746 in U.S. or
1-800-265-6778 in CANADA
www.ryobi.com
IMPORTANT MANUAL DO NOT THROW AWAY

THANK YOU
Thank you for buying this quality product. This modern
outdoor power tool will provide many hours of useful
service. You will find it to be a great labor-saving device.
This operator’s manual provides you with easy-to-
understand operating instructions. Read the whole
manual and follow all the instructions to keep your new
outdoor power tool in top operating condition. The other
manual that came with your power tool, the parts
manual, contains all the information that you need to
order parts.
PRODUCT REFERENCES, ILLUSTRATIONS AND
SPECIFICATIONS
All information, illustrations and specifications in this
manual are based on the latest product information
available at the time of printing. We reserve the right to
make changes at any time without notice.
Copyright©1999 Ryobi Outdoor Products, Inc.
All Rights Reserved.
Click-Link®is a registered trademark of Ryobi Outdoor
Products.
Bump-Head™is a trademark of Ryobi Outdoor
Products.
SERVICE INFORMATION
Service on this unit both within and after the warranty
period should be performed only by an authorized and
approved service dealer.
Dial:
•1-800-345-8746 or www.ryobi.com on the world wide
web for authorized service dealers in the United States
Or
• 1-800-265-6778 in Canada to obtain the listing of the
authorized service dealer nearest you.
to obtain the listing of the authorized service dealer
nearest you.
DO NOT RETURN THE UNIT TO THE RETAILER.
NOTE: PROOF OF PURCHASE WILL BE REQUIRED
FOR WARRANTY SERVICE.
Make sure this manual is carefully read and understood
before starting or operating this equipment.
THIS PRODUCT IS COVERED BY ONE OR MORE
US PATENTS, OTHER PATENTS PENDING.
2
INTRODUCTION TABLE OF CONTENTS
I. California Emission Regulations . . . . . . . . . . . . . . . . . 3
II. Rules for Safe Operation . . . . . . . . . . . . . . . . . . . . . 4-8
A. Important Safety Information . . . . . . . . . . . . . . . 4-5
B. Safety and International Symbols . . . . . . . . . . . 6-7
C. Know Your Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
III. Assembly Instructions . . . . . . . . . . . . . . . . . . . . . . 9-12
A. Installing and Adjusting the J handle . . . . . . . . . . . 9
B. Installing the Harness . . . . . . . . . . . . . . . . . . . . . . 9
C. Removing and Installing the
Cutting Attachment Shield . . . . . . . . . . . . . . . . . . 10
D. Remove the Cutting Attachment and
Install the Cutting Blade . . . . . . . . . . . . . . . . . . . 11
E. Remove the Cutting Blade and
Install the Cutting Attachment . . . . . . . . . . . . . . . 11
IV. Oil and Fuel Information . . . . . . . . . . . . . . . . . . . 12-13
A. Recommended Oil Type . . . . . . . . . . . . . . . . . . . 12
B. Adding Oil to Crankcase-Initial Use . . . . . . . . . . . 12
C. Recommended Fuel Type . . . . . . . . . . . . . . . . . . 13
D. Fueling the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 13
V. Starting/Stopping Instructions . . . . . . . . . . . . . . 14-15
VI. Operating Instructions . . . . . . . . . . . . . . . . . . . . 15-17
A. Operating the Click-Link System . . . . . . . . . . . . . 15
B. Holding the Trimmer . . . . . . . . . . . . . . . . . . . . . . 16
C. Adjusting Trimming Line Length . . . . . . . . . . . . . 16
D. Tips for Best Trimming Results . . . . . . . . . . . . . . 16
E. Decorative Trimming . . . . . . . . . . . . . . . . . . . . . . 17
F. Using the Cutting Blade . . . . . . . . . . . . . . . . . . . . 17
VII. Maintenance and Repair Instructions . . . . . . . . . 18-24
A. Maintenance Schedule . . . . . . . . . . . . . . . . . . . . 18
B. Line Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 18
C. Installing a Prewound Reel . . . . . . . . . . . . . . . . . 19
D. Checking the Oil Level . . . . . . . . . . . . . . . . . . . . . 20
E. Changing the Oil . . . . . . . . . . . . . . . . . . . . . . . . . 20
F. Air Filter Maintenance . . . . . . . . . . . . . . . . . . . . . 21
G. Carburetor Adjustment . . . . . . . . . . . . . . . . . . . . 22
H. Rocker Arm Clearance . . . . . . . . . . . . . . . . . . . . . 22
I. Replacing the Spark Plug . . . . . . . . . . . . . . . . . . 24
J. Spark Arrestor Maintenance . . . . . . . . . . . . . . . . 24
K. Accessories/Replacement parts . . . . . . . . . . . . . 24
VIII. Cleaning and Storage . . . . . . . . . . . . . . . . . . . . . . . . 25
IX. Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . 26
X. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
XI. Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-30
CONTENTS OF CARTON
•Model 890r Trimmer/Brushcutter with
Brush Blade with Cover
•J-Handle and Hardware
•Large Bump Head Cutting Attachment
•Cutting Attachment Shield with Hardware
•Shoulder Harness
•Locking Rod Tool
•Operator's Manual
•Parts Manual
•Product Registration Card
•Bottle of 4-Cycle Oil

3
CALIFORNIA EMISSION REGULATIONS
WARNING
NOTE: For users on U.S. Forest Land and in the states of California, Maine, Oregon and Washington. All U.S. Forest
Land and the state of California (Public Resources Codes 4442 and 4443), Oregon and Washington require, by law that
certain internal combustion engines operated on forest brush and/or grass-covered areas be equipped with a spark
arrestor, maintained in effective working order, or the engine be constructed, equipped and maintained for the prevention
of fire. Check with your state or local authorities for regulations pertaining to these requirements. Failure to follow these
requirements could subject you to liability or a fine. This unit is factory equipped with a spark arrestor. If it requires
replacement, ask your LOCAL SERVICE dealer to install the Accessory Part #180890 Spark Arrestor Screen.
FOR QUESTIONS, CALL 1-800-345-8746 IN U.S. OR 1-800-265-6778 in CANADA
California Proposition 65 Warning:
THE ENGINE EXHAUST FROM THIS
PRODUCT CONTAINS CHEMICALS
KNOWN TO THE STATE OF CALIFORNIA
TO CAUSE CANCER, BIRTH DEFECTS
OR OTHER REPRODUCTIVE HARM.
This engine meets U.S. EPA PH1 and 2000 model year and later California emissions regulations for small off-road
engines. These units are identified by the label on the engine of your product. A typical identification label is shown.
To ensure that your unit continues to meet these regulations, refer to the following information and instructions in this
operator’s manual.
Read the Operator’s Manual(s) and follow all warnings and safety instructions. Failure to do so can
result in serious injury to the operator and/or bystanders.
SPARK ARRESTOR
WARNING!

RULES FOR SAFE OPERATION
4
DANGER: Failure to obey a safety warning
will 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.
WARNING: Failure to obey a safety warning
can result in injury to yourself and others.
Always follow the safety precautions to
reduce the risk of fire, electric shock, and
personal injury.
CAUTION: Failure to obey a safety warning
may result in property damage or personal
injury to yourself or to others. Always follow
the safety precautions to reduce the risk of
fire, electric shock, and personal injury.
The purpose of safety symbols is to attract your
attention to possible dangers. The safety symbols, and
their explanations, 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
SAFETY ALERT SYMBOL: Indicates
danger, warning, or caution. Attention is
required in order to avoid serious personal
injury. May be used in conjunction with other
symbols or pictographs.
NOTE: Advises you of information or instructions vital
to the operation or maintenance of the equipment.
•IMPORTANT SAFETY INFORMATION •
READ ALL INSTRUCTIONS
BEFORE OPERATING
•Read the instructions carefully. Be familiar with the
controls and proper use of the unit.
•Do not operate this unit when tired, ill, or under the
influence of alcohol, drugs, or medication.
•Children and teens under the age of 15 must not use
the unit, except for teens guided by an adult.
•Inspect the unit before use. Replace damaged parts.
Check for fuel leaks. Make sure all fasteners are in
place and secure. Replace cutting attachment parts
that are cracked, chipped, or damaged in any way.
Make sure the cutting attachment is properly installed
and securely fastened. Be sure the cutting attachment
shield is properly attached, and positioned as
recommended. Failure to so can result in personal
injury to the operator and bystanders, as well as
damage to the unit.
•Use only 0.095 inch (2.41 mm) diameter genuine Ryobi
replacement line. Never use metal-reinforced line,
wire, or rope, etc. These can break off and become a
dangerous projectile.
•Be aware of the risk of injury to the head, hands and
feet.
•Clear the area to be cut 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 attachment. Clear the area of children,
bystanders, and pets. At a minimum, keep all children,
bystanders and pets outside a 50 feet (15 m) radius;
there still may be a risk to bystanders from thrown
objects. Bystanders should be encouraged to wear
eye protection. If you are approached, stop the engine
and cutting attachment immediately.
•Squeeze the throttle control and check that it returns
automatically to the idle position. Make all adjustments
or repairs before using unit.
SAFETY WARNINGS FOR GAS TRIMMERS
WARNING: Gasoline is highly flammable, and its vapors
can explode if ignited. Take the following precautions:
•Store fuel only in containers specifically designed and
approved for the storage of such materials.
•Always stop the engine and allow it to cool before
filling the fuel tank. Never remove the cap of the fuel
tank, or add fuel, when the engine is hot. Never
operate the unit without the fuel cap securely in place.
Loosen the fuel tank cap slowly to relieve any pressure
in the tank.
•Add fuel in a clean, well-ventilated area outdoors
where there are no sparks or flames. Slowly remove
the fuel cap only after stopping engine. Do not smoke
while fueling or mixing fuel. Wipe up any spilled fuel
from the unit immediately.
•Avoid creating a source of ignition for spilled fuel. Do
not start the engine until fuel vapors dissipate.
•Move the unit at least 30 feet (9.1 m) from the fueling
source and site before starting the engine. Do not
smoke, keep sparks and open flames from the area
while adding fuel or operating the unit.
WHILE OPERATING
•Never start or run the unit inside a closed room or
building. Breathing exhaust fumes can kill. Operate
this unit only in a well ventilated area outdoors.
•Wear safety glasses or goggles that are marked as
meeting ANSI Z87.1 standards, and ear/hearing
protection when operating this unit. Wear a face or
dust mask if the operation is dusty.
•Wear heavy, long pants, boots, gloves and a long
sleeve shirt. Do not wear loose clothing, jewelry, short
pants, sandals or go barefoot. Secure hair above
shoulder level.

RULES FOR SAFE OPERATION
5
•The cutting attachment shield must always be in place
while operating the unit. Do not operate unit without
both trimming lines extended, and the proper line
installed. Do not extend the trimming line beyond the
length of the shield.
•This unit has a clutch. The cutting attachment remains
stationary when the engine is idling. If it does not, have
the unit adjusted by an authorized service technician.
•Adjust the J-Handle to your size to provide the best
grip.
•Be sure the cutting attachment is not in contact with
anything before starting the unit.
•Use the unit only in daylight or good artificial light.
•Avoid accidental starting. Be in the starting position
whenever pulling the starter rope. The operator and
unit must be in a stable position while starting. See
Starting/Stopping Instructions.
•Use the right tool. Only use this tool for the purpose
intended.
•Do not overreach. Always keep proper footing and
balance.
•Always hold the unit with both hands when operating.
Keep a firm grip on both the front and rear handle or
grips.
•Keep hands, face, and feet at a distance from all
moving parts. Do not touch or try to stop the cutting
attachment when it is rotating.
•Do not touch the engine, gear housing or muffler.
These parts get extremely hot from operation. When
turned off they remain hot for a short time.
•Do not operate the engine faster than the speed
needed to cut, trim or edge. Do not run the engine at
high speed when not cutting.
•Always stop the engine when cutting is delayed or
when walking from one cutting location to another.
•If you strike or become entangled with a foreign
object, stop the engine immediately and check for
damage. Do not operate before repairing damage. Do
not operate the unit with loose or damaged parts.
•Stop and switch the engine to off for maintenance,
repair, or for changing the cutting attachment or other
attachments.
•Use only genuine Ryobi replacement parts and
accessories for this unit. These are available from
your authorized service dealer. Use of any non Ryobi
parts or accessories could lead to serious injury to the
user, or damage to the unit, and void your warranty.
•Keep unit clean of vegetation and other materials.
They may become lodged between the cutting
attachment and shield.
•To reduce fire hazard, replace faulty muffler and spark
arrestor, keep the engine and muffler free from grass,
leaves, excessive grease or carbon build up.
WHILE OPERATING WITH CUTTING BLADE
•Read and understand all safety warnings before
operating this unit.
•Always use the shoulder harness when using the
brush blade accessory.
•Keep the J-handle between the operator and cutting
attachment or blade at all times.
•NEVER cut with the cutting blade located over 30
inches (76 cm) or more above the ground level.
•Blade thrust may occur when the spinning blade
contacts an object that it does not immediately cut.
Blade thrust can be violent enough to cause the unit
and/or operator to be propelled in any direction , and
possibly 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 operation with the brush blade, do not cut
anything thicker than 1/2 inch or a violent kickback
could occur.
•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 the throttle trigger
is released. Maintain proper control until the blade has
completely stopped rotating.
•Do not run the unit at high speed when not cutting.
•If you strike or become entangled with a foreign
object, stop the engine immediately and check for
damage. Have any damage repaired before attempting
further operations. Do not operate unit with a bent,
cracked or dull blade. Discard blades that are bent,
warped, cracked or broken.
•Do not sharpen the cutting blade. Sharpening the
blade can cause the blade tip to break off while in use.
This can result in severe personal injury. Replace the
blade.
•Do not use the cutting blade for edging or as an
edger, severe personal injury to yourself or others can
occur. Use the cutting blade only for the purpose as
described in this manual.
•Stop the engine IMMEDIATELY if you feel excessive
vibration. Vibration is a sign of trouble. Inspect
thoroughly for loose nuts, bolts or damage before
continuing. Repair or replace affected parts as
necessary.
AFTER USE
•Clean cutting blades with a household cleaner to
remove any gum buildup. Oil the blade with machine
oil to prevent rust.
•Lock up and store the cutting blade in an appropriate
area to protect the blade from unauthorized use or
damage.

RULES FOR SAFE OPERATION
6
SAFETY AND INTERNATIONAL SYMBOLS
This operator's manual describes safety and international symbols and pictographs that may appear on this product.
Read the operator's manual for complete safety, assembly, operating and maintenance and repair information.
SYMBOL MEANING
•SAFETY ALERT SYMBOL
Indicates danger, warning, or caution. May be used in conjunction with other
symbols or pictographs.
•WARNING - READ OPERATOR'S MANUAL
Read the Operator’s Manual(s) and follow all warnings and safety instructions.
Failure to do so can result in serious injury to the operator and/or bystanders.
•FOR SERVICE INFORMATION, CALL:
USA: 1-800-345-8746
CANADA: 1-800-265-6778
•WEAR EYE AND HEARING PROTECTION
WARNING: Thrown objects and loud noise can cause severe eye injury and hearing loss.
Wear eye protection meeting ANSI Z87.1 standards and ear protection when
operating this unit.
•KEEP BYSTANDERS AWAY
WARNING: Keep all bystanders, especially children and pets, at least 50 feet (15 m)
from the operating area.
•PRIMER BULB
Push primer bulb, fully and slowly, 5 to 7 times.
•UNLEADED FUEL
Always use clean, fresh unleaded fuel.
OTHER SAFETY WARNINGS
•Never store the unit, with fuel in the tank, inside a
building where fumes may reach an open flame or
spark.
•Allow the engine to cool before storing or transporting.
Be sure to secure the unit while transporting.
•Store the unit in a dry area, locked up or up high
to prevent unauthorized use or damage, out of the
reach of children.
•Never douse or squirt the unit with water or any other
liquid. Keep handles dry, clean and free from debris.
Clean after each use, see Cleaning and Storage
instructions.
•Keep these instructions. Refer to them often and use
them to instruct other users. If you loan someone this
unit, also loan them these instructions.
SAVE THESE INSTRUCTIONS

RULES FOR SAFE OPERATION
7
SYMBOL MEANING
•OIL
Refer to operator's manual for the proper type of oil.
•THROWN OBJECTS AND ROTATING CUTTER CAN CAUSE SEVERE INJURY
WARNING: Do not operate without the cutting attachment shield in place.
Keep away from the rotating cutting attachment.
•ON/OFF STOP CONTROL
ON / START / RUN
•ON/OFF STOP CONTROL
OFF OR STOP
•HOT SURFACE WARNING
Do not touch a hot muffler, gear housing or cylinder. You may get burned. These parts get
extremely hot from operation. When turned off they remain hot for a short time.
•SHARP BLADE
WARNING: Sharp blade on cutting attachment shield. To prevent serious injury, do not
touch line cutting blade.
•CHOKE CONTROL
A •FULL choke position.
B •PARTIAL choke position.
C •RUN position.
•BRUSHCUTTERS •Replace dull blade.
Do not sharpen the cutting blade. Sharpening the blade can cause the blade tip to
break off while in use. This can result in severe personal injury.
•TRIMMER/BRUSHCUTTER SAFETY
WARNING: Thrown objects and rotating cutter can cause severe injury. Keep bystanders,
especially children and pets, at least 50 feet (15 m.) away from the cutting area. The cutting
attachment shield must be used when using the trimmer cutting attachment.
WARNING: The operation of any power tool can cause foreign objects to be thrown into your
eyes. This can lead to severe eye damage. Before commencing power tool operation, always
wear safety glasses or goggles that are marked as meeting ANSI Z87.1 standards, and a full
face shield when needed.

RULES FOR SAFE OPERATION
8
APPLICATIONS
As a trimmer;
•Cutting grass and light weeds.
•Edging
•Decorative trimming around trees, fences, etc.
As a brushcutter;
•Cutting weeds and light bush of up to 1/2 inch in
diameter.
Other optional accessories may be used with the 890r.
See list of add-ons on page 15.
Cutting Attachment
Shield
Fuel Cap
Throttle
Control
Throttle
Lock-Out
J-Handle
Cutting Attachment
Gear Housing
Shaft Grip
Primer Bulb
Choke Lever
Oil Fill Plug / Dipstick
Air Filter Cover
Engine Feet
Spark Plug
On/Off Stop Control
Shaft
Housing
Starter Rope Grip
KNOW YOUR UNIT
Clink-Link
Blade Shield /
Shield Mount
Brush
Blade with
Cover
Line Cutting Blade
Spark Plug
Muffler
Muffler Guard
Spark Arrestor

6. While holding the unit in the operating position
(Fig. 3), position the J-handle to the location
that provides you the best grip.
7. Tighten the clamp screws evenly, until the J-handle
is secure.
INSTALLING THE HARNESS
WARNING: Always use the shoulder harness
when using the cutting blade to avoid serious
personal injury.
1. Push the strap through the center of the buckle.
2. Pull the strap over the cross bar and down through
the slot in the buckle (Fig. 4).
ASSEMBLY INSTRUCTIONS
9
Decal
Fig. 1
Fig. 4
Fig. 6
Fig. 5
Fig. 2
Fig. 3
3. Put the harness on over head and onto shoulder.
Snap it on to the support fitting (Fig. 5).
Support Fitting
4. Adjust length to fit the operator’s size. Pull tab to
lengthen, pull strap to shorten (Fig 6).
INSTALLING AND ADJUSTING THE J-HANDLE
1. Place the J-handle between the top and middle
clamp pieces (Fig. 1).
2. While holding the three pieces together, install the
four (4) screws through the top clamp and into
middle clamp.
NOTE: The holes in the top and middle clamp will line up
only when assembled correctly.
3. Place the clamps and J-handle the over the shaft
housing and onto the bottom clamp.
4. Hold each hex nut in the bottom clamp recess with a
finger. Start screws with a large Phillips screwdriver.
Do not tighten until you make the handle adjustment.
5. Slide the J-handle in or out until the arrow/white line
on the decal touches the clamp assembly (Fig. 2).
(4) Screws
Top Clamp
J-Handle
Middle Clamp
Bottom Clamp
Nuts

ASSEMBLY INSTRUCTIONS
10
Install the cutting attachment shield when using the
unit as a grass trimmer.
WARNING: To avoid serious personal injury,
the cutting attachment shield SHALL be in
place at all times while operating the unit as
a grass trimmer.
Install the cutting attachment shield on the shield mount
by inserting the three (3) screws into the shield mount.
Tighten securely with a flat blade screwdriver (Fig. 7).
REMOVE THE CUTTING ATTACHMENT AND
INSTALL THE CUTTING BLADE
NOTE: To make removing or installing the cutting blade
or cutting attachment easier, place the unit on
the ground or on a work bench.
Remove the Cutting Attachment Shield
See Removing and Installing Cutting Attachment Shield,.
Remove the Cutting Attachment
WARNING: The gear housing gets hot with
use and can result in injury to the operator.
When the unit is turned off it remains hot for
a short time. Do not touch the gear housing
until it has cooled.
1. Align the shaft bushing hole with the locking rod slot
and insert the locking rod into the shaft bushing hole
(Fig. 8).
REMOVING AND INSTALLING CUTTING
ATTACHMENT SHIELD
Remove the cutting attachment shield when using
the unit as a brushcutter.
WARNING: The cutting attachment shield
should NOT be installed when operating the
unit with a blade. Remove the cutting
attachment shield before removing or
installing the blade.
Remove the cutting attachment shield from the shield
mount by removing the three (3) screws with a flat blade
screwdriver (Fig. 7). Store parts for future use.
(3) Screws
Cutting
Attachment
Shield
Shield Mount
Gear Housing
Shield
Mount
Install the Cutting Blade
WARNING: To avoid serious personal injury,
always wear gloves while handling or
installing the blade.
3. Place the cutting blade on the output shaft (Fig. 10).
Cutting Attachment
Locking Rod
Cutting
Blade
Blade Retainer Nut
Locking Rod Slot
Blade Cover
Locking Rod
Output Shaft
Pilot Hole
Shaft
Bushing Hole
Locking
Rod Slot
Output Shaft
Bushing
Locking Rod
Output Shaft
2. While holding the locking rod, remove the cutting
attachment by turning it clockwise off of the output
shaft (Fig. 9). Store the cutting attachment for future
use.
Fig. 7
Fig. 8
Fig. 9
Fig. 10

ASSEMBLY INSTRUCTIONS
11
4. Center the cutting blade on the pilot step of the
output shaft bushing (Fig. 11).
Pilot Step
Output Shaft
Bushing
Output Shaft
Fig. 12
Fig. 13
Fig. 14
Fig. 11
5. Make sure that the cutting blade is centered on the
pilot step and sitting flat against the output shaft
bushing (Fig. 12).
WARNING: If the cutting blade is off-center,
the unit will vibrate, and the blade may fly off,
which can cause serious personal injury.
6. Align the shaft bushing hole with the locking rod
slot and insert the locking rod into the bushing hole
(Fig. 8).
7. Put the blade retainer and nut on the output shaft.
Make sure that the blade is installed correctly.
8. Tighten counterclockwise against the blade while
holding the locking rod (Fig. 13).
Counterclockwise
Pilot Step
9. Remove the locking rod from the locking rod slot.
WARNING: To avoid serious personal injury
or damage to the unit, do not start or operate
this unit with the locking rod in the locking
rod slot.
10. Remove the cutting blade cover by un-snapping the
plastic lock on the cover and pulling it from the
blade. Store the cover for future use.
WARNING: Do not sharpen the cutting
blade. Sharpening the blade can cause the
blade tip to break off while in use. This can
result in severe personal injury. Replace the
blade.
REMOVE THE CUTTING BLADE AND INSTALL
THE CUTTING ATTACHMENT
Remove the Cutting Blade
WARNING: To avoid serious personal injury,
always wear gloves while handling or
installing the blade.
1. Install the cutting blade cover. Pull the cover around
the blade and click the plastic lock.
2. Align the shaft bushing hole with the locking rod
slot and insert the locking rod into the bushing hole
(Fig. 8).
1/4-1/2 turn
Counterclockwise
•If using a torque wrench and an 5/8 inch socket
tighten to;
325 - 335 in•lb,
27 - 28 ft.•lb,
37 -38 N•m.
•Without a torque wrench, use a 5/8 inch closed-end or
socket wrench, turning the nut until the blade retainer
is snug against the shaft bushing. Make sure that the
blade is installed correctly, then rotate the nut an
additional 1/4 to 1/2 turn counterclockwise (Fig. 14).

OIL AND FUEL INFORMATION
ASSEMBLY INSTRUCTIONS
12
RECOMMENDED OIL TYPE
Using the proper type and weight of oil in the
crankcase is extremely important. Check the
oil before each use and change the oil
regularly. Failure to use the correct oil, or
using dirty oil, can cause premature engine wear and
failure.
Use a high-quality SAE 30 weight oil of API (American
Petroleum Institute) service class SF, SG, SH.
ADDING OIL TO CRANKCASE –INITIAL USE
NOTE: This unit is shipped without being filled with oil.
In order to avoid damage to the unit, put oil in
the crankcase before attempting to start unit.
Your unit is supplied with one 3.4 fluid oz. (100 ml.)
bottle of SAE 30 SF, SG, SH oil (Fig. 17).
NOTE: Save the bottle to measure the correct amount
for future oil changes. See Changing the Oil
Pg. 20.
1. Unscrew the top of the bottle of oil and remove the
paper seal covering the opening. Replace top. Cut
the tip off the funnel spout (Fig. 17).
2. Place the unit on a flat level surface.
3. Remove the oil plug / dipstick from the crankcase
(Fig. 18).
Fig. 17
Oil Fill Plug/Dipstick
Oil Fill Hole
Fig. 18
O-Ring
Funnel Spout
Cutting Attachment
Locking Rod
4. Remove the nut, blade retainer, and blade. Store the
nut and blade together for future use in a secure
place. Store out of reach of children.
Install the Cutting Attachment
5. Align the shaft bushing hole with the locking rod slot
and insert the locking rod into the shaft bushing hole.
(Fig. 8, Pg. 10). Place the blade retainer on the
output shaft with the flat surface against the output
shaft bushing as shown in Fig. 16. Screw the cutting
attachment counterclockwise onto the output shaft.
Tighten securely.
Clockwise
6. Remove the locking rod.
7. Install the cutting attachment shield. See Removing
and Installing Cutting Attachment Shield, Pg. 10.
WARNING: To avoid serious personal injury,
the cutting attachment shield SHALL be in
place at all times while operating the unit as
a grass trimmer.
3. While holding the locking rod, loosen the nut on
the blade by turning it clockwise with a 5/8 inch
closed-end or socket wrench (Fig. 15).
NOTE: The blade retainer must be installed on the
output shaft in the position shown for the cutting
attachment to work correctly.
Blade Retainer
Output Shaft
Bushing
Fig. 15
Fig. 16

OIL AND FUEL INFORMATION
13
Fig. 19
Oil Fill
NOTE: Never add oil to the fuel or fuel tank.
5. Wipe up any oil that may have spilled and reinstall
the oil fill plug / dipstick.
The importance of checking and maintaining the proper
oil level in the crankcase cannot be overemphasized.
Check oil before each use and change as needed. See
Changing the Oil Pg. 19.
RECOMMENDED FUEL TYPE
Old fuel is the primary reason for the unit not
running properly. Be sure to use fresh, clean,
unleaded Gasoline.
NOTE: This is a four cycle engine. In order to avoid
damage to the unit, do not mix oil with
Gasoline.
Definition of Blended Fuels
Today's fuels are often a blend of gasoline and
oxygenates such as ethanol, methanol or MTBE (ether).
Alcohol-blended fuel absorbs water. As little as 1%
water in the fuel can make fuel and oil separate or form
acids when stored. Use fresh fuel (less than 60 days
old), when using alcohol-blended fuel.
Using Blended Fuels
If you choose to use a blended fuel, or its use is
unavoidable, follow recommended precautions.
•Always use fresh unleaded gasoline
•Use the fuel additive STA-BIL®or an equivalent.
•Drain tank and run the engine dry before storing unit.
Using Fuel Additives
The use of fuel additives, such as STA-BIL®Gas
Stabilizer or an equivalent, will inhibit corrosion and
minimize the formation of gum deposits. Using a fuel
additive can keep fuel from forming harmful deposits in
the carburetor for up to six (6) months. Add 0.8 oz.
(23 ml.) of fuel additive per gallon of fuel according to the
instructions on the container. NEVER add fuel additives
directly to the unit's gas tank.
4. Pour the entire bottle of oil into the oil fill hole
(Fig. 19).
FUELING UNIT
WARNING: Gasoline is extremely flammable
and its vapors can explode if ignited. To
avoid serious personal injury, always stop the
engine and allow it to cool before filling the
fuel tank. Do not smoke while filling the tank.
Keep sparks and open flames away from the
area.
1. Remove fuel cap (Fig. 20).
WARNING: Remove fuel cap slowly to avoid
injury from gasoline spray.
Fig. 20
Fuel Cap Fuel Tank
Gas Can Spout
2. Place spout of gas container into the fill hole on the
fuel tank (Fig. 20) and fill tank.
WARNING: Add gasoline in a clean, well
ventilated area outdoors. Avoid creating a
source of ignition for spilt fuel.
NOTE: Do not overfill tank.
3. Wipe up any gasoline that may have spilled
4. Reinstall the fuel cap.
WARNING: Never operate the unit without
the fuel cap securely in place.
5. Move the unit at least 30 ft. (9.1 m) from the fueling
source and site before starting the engine.
NOTE: Dispose of the old gasoline in accordance to
Federal, State, and Local regulations.
Unleaded
Gasoline

STARTING/STOPPING INSTRUCTIONS
14
WARNING: Avoid accidental starting. Be in
the starting position whenever pulling the
starting rope. To avoid serious personal
injury, the operator and unit must be in a
stable position while starting.
STARTING INSTRUCTIONS
Cold Start - First Start of the Day or Engine Ran Out
of Fuel
WARNING: Operate this unit only in a well
ventilated area outdoors. Carbon monoxide
exhaust fumes can be lethal in a confined
area.
1. Check oil level in crankcase. See Checking the Oil
Level Pg. 20.
2. Fill the fuel tank with fresh, clean, unleaded gasoline
(see page 13).
3. Put the Start/Stop Engine Control in the START [I]
position (Fig. 21).
Fig. 21
Fig. 22
Fig. 23
4. Place the choke lever in the FULL choke (A)
position (Fig. 22).
NOTE: Slide the choke lever directly above the
appropriate symbol on air filter cover decal
(Fig. 22).
5. Fully press and release the primer bulb slowly 7
times. Gasoline should be felt and visible in the bulb
(Fig. 22). If gasoline has not entered the bulb, press
three more times, or until it does.
11. Release the throttle control to the idle position and
begin operation.
NOTE: If the engine does not start using these
procedures, repeat steps 5 through 11 using
TWO (2) pulls in the FULL choke (A) position.
Engine Re-Start - Warm Engine With Fuel
1. Put the Start/Stop Engine Control in the START [I]
position (Fig. 21).
2. Move the choke lever to the PARTIAL (B) position
(Fig. 22).
3. Fully press and release the primer bulb slowly 7
times. Gasoline should be felt and visible in the bulb
(Fig. 22). If gasoline has not entered the bulb, press
three more times, or until it does.
4. While pressing the throttle lock-out, squeeze the
throttle control to the wide open (full throttle)
position (Fig. 21).
5. With the unit in the starting position (Fig. 23), pull the
starter rope briskly until the engine starts.
6. When the engine starts, move the choke lever to the
RUN (C) position, and run at full throttle for 30
seconds.
NOTE: If the engine does not start using the Engine
Re-start procedures, revert to the Cold Start
procedures.
NOTE: 4-stroke engines, like cars, are able to start in
the idle position. As an alternate method, you
may want to start your unit in the idle position
when the unit is warm. With the Start/Stop
control in the START position, pull the starter
rope briskly. When the engine starts, run at full
throttle for 30 seconds. If the unit fails to start or
dies, revert to the Engine Re-Start procedure.
6. While pressing the throttle lock-out, squeeze the
throttle control to the wide open (full throttle)
position (Fig. 21).
7. With the unit in the starting position (Fig. 23) pull the
starter rope briskly 5 times in the FULL choke (A)
position. If the engine attempts to run before the
fifth pull, proceed to step 8.
8. Move the choke lever to the PARTIAL (B) position
(Fig. 22).
NOTE: The engine will not run in the FULL choke (A)
position.
Start / Stop Control
START (I)
STOP (O)
Throttle Lock-Out
Primer Bulb
Choke Lever
Starter Rope
Throttle Control
Throttle Control
9. Pull the starter rope 1 to 3 pulls until the engine
starts. Run for 15-30 seconds. If the unit fails to start
return to step 7.
10. Move the choke lever to the RUN (C) position and
run at full throttle for 30 seconds.

STARTING/STOPPING INSTRUCTIONS
15
OPERATING INSTRUCTIONS
CAUTION: The cutting attachment and
add-ons with the Click-Link®system are to
be used in the primary hole unless stated
otherwise in the specific add-ons operator’s
manual. Using the wrong hole could lead to
personal injury, or damage to the unit.
For edging when using the line head cutting attachment
with Click-Link®models, lock the release button of the
cutting attachment into the 90°edging hole or the 180°
edging hole(Fig. 26).
WARNING: Do not use the cutting blade for
edging or as an edger, severe personal injury
to yourself or others can occur.
OPERATING THE CLICK-LINK®SYSTEM
The Click-Link®system enables the use of these
optional add-ons.
Blower/Vacuum . . . . . . . . . . . . . . . . . . . . . . . . . . BV720r
Cultivator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GC720r
Edger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LE720r
Hedge Trimmer . . . . . . . . . . . . . . . . . . . . . . . . . . HS720r
Snow Thrower . . . . . . . . . . . . . . . . . . . . . . . . . . . ST720r
Straight Shaft Trimmer . . . . . . . . . . . . . . . . . . . . SS725r
Sweeper/Blower . . . . . . . . . . . . . . . . . . . . . . . . . SB720r
Tree Pruner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TP720r
Turbo Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . TB720r
WARNING: Read and understand operator’s
manual for add-on prior to operation.
Removing the Cutting Attachment or Add-Ons:
1. Turn the knob counterclockwise to loosen (Fig. 24).
2. Press and hold the release button (Fig. 24).
3. While firmly holding the upper shaft housing, pull the
cutting attachment or add-on straight out of the
Click-Link®coupler (Fig. 25).
Installing the Cutting Attachment or Add-Ons:
WARNING: To avoid serious personal injury
and damage to the unit, shut unit off before
removing or installing add-ons.
NOTE: To make installing or removing the add-on
easier, place the unit on the ground or on a work
bench.
1. Turn knob counterclockwise to loosen (Fig.24).
Fig. 24
Click-Link®Coupler Release Button
Guide Recess
Knob
Primary Hole
Upper Shaft Housing
90˚Edging Hole
Click-Link®Coupler
2. While firmly holding the add-on, push it straight into
the Click-Link®coupler (Fig. 25).
NOTE: Aligning the release button with the guide recess
will help installation (Fig. 24).
3. Turn the knob clockwise to tighten (Fig. 26).
CAUTION: Lock the release button in the
primary hole and securely tighten the knob
before operating this unit.
Fig. 25
Fig. 26
Knob
180˚Edging Hole
Lower Shaft Housing
Release Button
STOPPING INSTRUCTIONS
1. Release your hand from the throttle control (Fig. 23).
Allow the engine to idle.
2. To stop the engine, put the Start/Stop Engine
Control in the STOP [O] position (Fig. 21).

OPERATING INSTRUCTIONS
16
Each time the head is bumped, about 1 inch (25.4 mm.)
of trimming line is released. A blade in the cutting
attachment shield will cut the line to the proper length if
excess line is released.
For best results, tap the Bump Head™on bare ground
or hard soil. If line release is attempted in tall grass, the
engine may stall. Always keep the trimming line fully
extended. Line release becomes more difficult as the
cutting line becomes shorter.
NOTE: Do not rest the Bump Head™on the ground
while the unit is running .
CAUTION: Do not remove or alter the line
cutting blade assembly. Excessive line length
will make the clutch overheat. This may lead
to serious personal injury or damage to the
unit.
Some line breakage will occur from:
•Entanglement with foreign matter
•Normal line fatigue
•Attempting to cut thick, stalky weeds
•Forcing the line into objects such as walls or fence
posts
TIPS FOR BEST TRIMMING RESULTS
•Keep the cutting attachment parallel to the ground.
•Do not force the cutting attachment. Allow the tip of
the line to do the cutting, especially along walls.
Cutting with more than the tip will reduce cutting
efficiency and may overload the engine.
•Cut grass over 8 inches (200 mm) by working from
top to bottom in small increments to avoid
premature line wear or engine drag.
•Cut from left to right whenever possible. Cutting to
the right improves the unit's cutting efficiency.
Clippings are thrown away from the operator.
•Slowly move the trimmer into and out of the cutting
area at the desired height. Move either in a forward-
backward or side-to-side motion. Cutting shorter
lengths produces the best results.
•Trim only when grass and weeds are dry.
•The life of your cutting line is dependent upon;
•Following the previous trimming techniques
•What vegetation is being cut
•Where it’s being cut
For example, the line will wear faster when trimming
against a foundation wall as opposed to trimming
around a tree.
HOLDING THE TRIMMER
WARNING: Always wear eye, hearing, foot
and body protection to reduce the risk of
injury when operating this unit.
Before operating the unit, stand in the operating position
(Fig. 27). Check for the following:
•The operator is wearing eye protection and proper
clothing.
•The right arm is slightly bent, and the hand is holding
the shaft grip.
•The left arm is straight, and the hand is holding the
J-handle.
•The unit is at waist level.
•The cutting attachment is parallel to the ground and
easily contacts the vegetation to be cut without the
operator having to bend over.
Fig. 27
ADJUSTING TRIMMING LINE LENGTH
The Bump Head™cutting attachment allows you to
release trimming line without stopping the engine. To
release more line, lightly tap the cutting attachment on
the ground (Fig. 28) while operating the trimmer at high
speed.
NOTE: Always keep the trimming line fully extended.
Line release becomes more difficult as cutting
line becomes shorter
Fig. 28

OPERATING INSTRUCTIONS
17
Fig. 29
Fig. 30
Fig. 31
DECORATIVE TRIMMING
Decorative trimming is accomplished by removing all
vegetation around trees, posts, fences, etc.
Rotate the whole unit so that the cutting attachment is at
a 30°angle to the ground (Fig. 29).
USING THE CUTTING BLADE
WARNING: Always wear eye, hearing, foot,
body protection and the strap to reduce the
risk of injury when operating this unit.
WARNING: Do not use the cutting blade for
edging or as an edger, severe personal injury
to yourself or others can occur.
Before operating the unit with the cutting blade stand in
the operating position (Figs. 30). Refer to Holding the
Trimmer, Pg. 16.
Cutting Blade Operating Tips:
To establish a rhythmic cutting procedure:
•Plant feet firmly, comfortably apart.
•Bring the engine to full throttle before entering the
material to be cut. The blade has maximum cutting
power at full throttle and is less likely to bind, stall, or
cause blade thrust, which can result in serious
personal injury to the operator or others.
WARNING: Blade thrust may occur when the
spinning blade contacts an object that it
does not immediately cut. Blade thrust can
be violent enough to cause the unit and/or
operator to be propelled in any direction, and
possibly 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.
•Cut while swinging the upper part of your body from
right to left.
•Always release the throttle trigger and allow the engine
to return to idle speed when not cutting.
•When done always unsnap unit from harness before
taking harness off.
WARNING: The blade continues to spin after
the engine is turned off. The coasting blade
can seriously cut you if accidentally touched.
•Swing the unit in the same direction as the blade
spins, which increases the cutting action.
•Move forward to the next area to be cut after the
return swing and plant feet again.
•The cutting blade is designed with a second cutting
edge, which can be used by removing the blade,
turning it upside down, and reinstalling it.
WARNING: Do not sharpen the cutting
blade. Sharpening the blade can cause the
blade tip to break off while in use. This can
result in severe personal injury to yourself or
others. Replace the blade.
To reduce the chance of material wrapping around the
blade, follow these steps:
•Cut at full throttle.
•Swing the unit into material to be cut from your right to
your left (Fig. 31).
•Avoid the material just cut as you make the return
swing.
WARNING: Do not clear away cut material
with the engine running or blade turning. To
avoid serious personal injury, turn off engine.
Allow the blade to stop before removing
materials wrapped around the blade shaft.

MAINTENANCE AND REPAIR INSTRUCTIONS
18
Indexing Teeth
Fig. 33
Fig. 34
LINE INSTALLATION
Always use genuine Ryobi 0.095 in. (2.41 mm.)
replacement line. Larger line may make the engine
overheat or fail.
WARNING: Never use metal-reinforced line,
wire, or rope, etc. These can break off and
become a dangerous projectile.
There are two methods to replace the trimming line.
•Wind the inner reel with new line
•Install a prewound inner reel
Winding the Existing Inner Reel
1. Hold the outer spool with one hand and unscrew the
Bump Knob™clockwise (Fig. 32). Inspect the bolt
inside the Bump Knob to make sure it moves freely.
Replace the Bump Knob if damaged.
2. Remove the inner reel from the outer spool (Fig. 32).
3. Remove spring from the inner reel (Fig. 32).
4. Use a clean cloth to clean the the inner reel, spring,
shaft, and inner surface of the outer spool (Fig. 33).
5. Check the indexing teeth on the inner reel and outer
spool for wear (Fig. 34). If necessary, remove burrs
or replace the reel and spool.
WARNING: To prevent serious injury, never
do maintenance or repairs with unit running.
Always do maintenance and repairs on a
cool unit. Disconnect spark plug wire to
ensure the unit will not start.
NOTE: Some maintenance procedures may require
special tools or skills. If you are unsure about
these procedures take your unit to an authorized
service dealer.
MAINTENANCE SCHEDULE
These required maintenance procedures should be
performed at the frequency stated in the table. They
should also be included as part of any seasonal tune-up.
FREQUENCY MAINTENANCE REQUIRED REFER TO:
Before Starting Engine Fill fuel tank with fresh fuel Page 13
Check oil Page 20
Every 10 Hours Clean and re-oil air filter. Page 21
1st Change at 10 Hours Change oil Page 20
Every 25 Hours there after Change oil Page 20
Every 25 Hours Clean Spark Arrestor Page 24
10 hours on new engine Check rocker arm to valve clearance and adjust as required Page 22-23
Every 50 Hours Check rocker arm to valve clearance and adjust as required Page 22-23
Every 50 Hours Check spark plug condition and gap Page 24
Inner Reel
Spring
Outer Spool
Bump Knob™
Bolt
Fig. 32

MAINTENANCE AND REPAIR INSTRUCTIONS
19
Fig. 36
Fig. 37
Fig. 38
Fig. 35
6. Take approximately 25 feet (7.6 m) of new trimming
line, loop it into two equal lengths. Insert each end of
the line through one of the two holes in the inner reel
(Fig. 35). Pull the line through the inner reel so that
the loop is as small as possible.
NOTE: Always use the correct line length when installing
trimming line on the unit. The line may not
release properly if the line is too long.
Holding Slots
7. Wind the lines in tight even layers, onto the reel
(Fig. 36). Wind the line in the direction indicated on
the inner reel. Place your index finger between the
two lines to stop the lines from overlapping. Do not
overlap the ends of the line.
NOTE: Failure to wind the line in the direction indicated
will cause the cutting attachment to operate
incorrectly.
8. Insert the ends of the line into the two holding slots
(Fig. 37).
9. Place the spring in the inner reel. Insert the ends of
the line through the eyelets in the outer spool and
place inner reel inside the outer spool (Fig. 38). Push
the inner reel and outer spool together. While holding
the inner reel and outer spool, grasp the ends and
pull firmly to release the line from the holding slots in
the spool.
NOTE: The spring must be assembled on the inner reel
before reassembling the cutting attachment.
10. Hold the inner reel in place and install the Bump
Knob by turning counterclockwise. Tighten securely.
INSTALLING A PREWOUND REEL
1. Hold the outer spool with one hand and unscrew the
Bump Knob counterclockwise (Fig. 32). Inspect the
bolt inside the Bump Knob to make sure it moves
freely. Replace the Bump Knob if damaged.
2. Remove the old inner reel from the outer spool
(Fig. 32).
3. Remove the spring from the old inner reel
(Fig. 32).
4. Place the spring in the new inner reel.
NOTE: The spring must be assembled on the inner reel
before reassembling the cutting attachment.
5. Insert the ends of the line through the eyelets in the
outer spool (Fig. 38).
6. Place the new inner reel inside the outer spool. Push
the inner reel and outer spool together. While holding
the inner reel and outer spool, grasp the ends and
pull firmly to release the line from the holding slots in
the spool.
7. Hold the inner reel in place and install the Bump
Knob by turning clockwise. Tighten securely.
Replacement Parts:
See Accessories / Replacement Parts on page 24.

MAINTENANCE AND REPAIR INSTRUCTIONS
20
CHECKING THE OIL LEVEL
CAUTION: To prevent extensive engine wear
and damage to the unit, always maintain the
proper oil level in the crankcase. Never
operate the unit with the oil level below the
bottom of the dipstick.
The importance of checking and maintaining the proper
oil level in the crankcase cannot be overemphasized.
Check oil before each use:
1. Stop engine and allow oil to drain into the crankcase.
2. Place the unit on a flat, level surface to get a proper
oil level reading.
3. Keep dirt, grass clippings, etc., out of the engine.
Clean the area around the oil fill plug/dipstick before
removing it.
4. Remove the oil fill plug/dipstick and wipe off oil.
Reinsert it all the way back in.
5. Remove the oil fill plug/dipstick and check oil level.
Oil should be up to the top of the dipstick (Fig. 39).
6. If the level is low, add a small amount of oil to the oil
fill hole and recheck (Fig. 40). Repeat until the oil
level reaches the top of the dipstick.
NOTE: Do not overfill the unit.
Top of Dipstick
O-Ring
Oil Fill Plug/Dipstick
CHANGING THE OIL
For a new engine, change the oil after the first 10 hours
of operation. Change the oil while the engine is still
warm. The oil will flow freely and carry away more
impurities.
CAUTION: Wear gloves to prevent injury
when handling the unit.
1. Unplug spark plug boot to eliminate starting
2. Remove the oil fill plug/dipstick.
3. Pour the oil out of the oil fill hole and into a container
by tipping the unit to a vertical position (Fig. 41).
Allow ample time for complete drainage.
Fig. 41
Fig. 39
Fig. 40
NOTE: Make sure the O-ring is in place on the oil fill
plug/dipstick when checking and changing the
oil (Fig. 40).
Oil Fill Plug/Dipstick
Oil Fill Hole
O-Ring
Full
Add 1.4-1.5 Oz.
(41-44 ml)
6. Replace the oil fill plug/dipstick.
7. Reconnect spark plug boot.
Fig. 42
4. Wipe up any oil residue on the unit and clean up any
oil that may have spilled. Dispose of the oil
according to Federal, State and local regulations.
5. Refill the crankcase with 3.4 fluid ounce (100 ml) of
SAE 30 SF, SG, SH oil.
NOTE: Use the bottle and spout saved from initial use to
measure the correct amount. 3.4 ounce (100 ml)
is approximately to the top of the label on the
bottle (Fig. 42). Check the level with the dipstick.
If the level is low, add a small amount of oil and
recheck (Fig. 39). Do not overfill.
Fill Level