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
IMPORTANT MANUAL
DO NOT THROW AWAY
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CALIFORNIA EMISSION REGULATIONS
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.
California Proposition 65 Warning:
WARNING
THE ENGINE EXHAUST FROM THIS
PRODUCT CONTAINS CHEMICALS
KNOWN TO THE STATE OF CALIFORNIA
TO CAUSE CANCER, BIRTH DEFECTS
OR OTHER REPRODUCTIVE HARM.
SPARK ARRESTOR
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
WARNING!
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.
3
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RULES FOR SAFE OPERATION
The purpose of safety symbols is to attract your
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.
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.
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.
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.
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.
NOTE: Advises you of information or instructions vital
to the operation or maintenance of the equipment.
• IMPORTANT SAFETY INFORMATION •
SAFETY WARNINGS FOR GAS TRIMMERS
WARNING: Gasoline is highly flammable, and its vapors
can explode if ignited. Take the following precautions:
READ ALL INSTRUCTIONS
BEFORE OPERATING
• Read the instructions carefully. Be familiar with the
controls and proper use of the unit.
• Store fuel only in containers specifically designed and
approved for the storage of such materials.
• Do not operate this unit when tired, ill, or under the
influence of alcohol, drugs, or medication.
• 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.
• 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.
• 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.
• 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
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.
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.
• 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.
• Squeeze the throttle control and check that it returns
automatically to the idle position. Make all adjustments
or repairs before using unit.
4
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RULES FOR SAFE OPERATION
• The cutting attachment shield must always be in place
WHILE OPERATING WITH CUTTING BLADE
• Read and understand all safety warnings before
operating this unit.
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.
• Always use the shoulder harness when using the
brush blade accessory.
• 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.
• Keep the J-handle between the operator and cutting
attachment or blade at all times.
• Adjust the J-Handle to your size to provide the best
grip.
• NEVER cut with the cutting blade located over 30
inches (76 cm) or more above the ground level.
• Be sure the cutting attachment is not in contact with
• 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.
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.
• For operation with the brush blade, do not cut
anything thicker than 1/2 inch or a violent kickback
could occur.
• Use the right tool. Only use this tool for the purpose
intended.
• Do not overreach. Always keep proper footing and
balance.
• Do not attempt to touch or stop the blade when it is
rotating.
• Always hold the unit with both hands when operating.
Keep a firm grip on both the front and rear handle or
grips.
• 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.
• 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 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 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.
• 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.
• 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.
• 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 and switch the engine to off for maintenance,
repair, or for changing the cutting attachment or other
attachments.
• 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.
• 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.
AFTER USE
• Clean cutting blades with a household cleaner to
remove any gum buildup. Oil the blade with machine
oil to prevent rust.
• Keep unit clean of vegetation and other materials.
They may become lodged between the cutting
attachment and shield.
• Lock up and store the cutting blade in an appropriate
area to protect the blade from unauthorized use or
damage.
• 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.
5
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RULES FOR SAFE OPERATION
• Never douse or squirt the unit with water or any other
OTHER SAFETY WARNINGS
• Never store the unit, with fuel in the tank, inside a
building where fumes may reach an open flame or
spark.
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.
• 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.
SAVE THESE INSTRUCTIONS
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.
6
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RULES FOR SAFE OPERATION
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.
7
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RULES FOR SAFE OPERATION
Spark Arrestor
KNOW YOUR UNIT
Spark Plug
APPLICATIONS
Muffler
As a trimmer;
•
•
•
Cutting grass and light weeds.
Edging
Muffler Guard
Decorative trimming around trees, fences, etc.
As a brushcutter;
Fuel Cap
•
Cutting weeds and light bush of up to 1/2 inch in
diameter.
Starter Rope Grip
Shaft Grip
Other optional accessories may be used with the 890r.
See list of add-ons on page 15.
Throttle
Lock-Out
On/Off Stop Control
Throttle
Control
J-Handle
Choke Lever
Clink-Link
Blade Shield /
Shield Mount
Spark Plug
Primer Bulb
Air Filter Cover
Shaft
Housing
Brush
Blade with
Cover
Cutting Attachment
Shield
Gear Housing
Oil Fill Plug / Dipstick
Engine Feet
Cutting Attachment
Line Cutting Blade
8
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ASSEMBLY INSTRUCTIONS
6. While holding the unit in the operating position
INSTALLING AND ADJUSTING THE J-HANDLE
1. Place the J-handle between the top and middle
clamp pieces (Fig. 1).
(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.
J-Handle
INSTALLING THE HARNESS
(4) Screws
WARNING: Always use the shoulder harness
when using the cutting blade to avoid serious
personal injury.
Top Clamp
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).
Middle Clamp
Bottom Clamp
Nuts
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).
Fig. 4
3. Put the harness on over head and onto shoulder.
Snap it on to the support fitting (Fig. 5).
Decal
Support Fitting
Fig. 2
Fig. 5
4. Adjust length to fit the operator’s size. Pull tab to
lengthen, pull strap to shorten (Fig 6).
Fig. 3
Fig. 6
9
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ASSEMBLY INSTRUCTIONS
REMOVING AND INSTALLING CUTTING
ATTACHMENT SHIELD
Remove the cutting attachment shield when using
the unit as a brushcutter.
Output Shaft
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.
Output Shaft
Bushing
Locking Rod
Shaft
Bushing Hole
Locking
Rod Slot
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.
Fig. 8
Cutting
Attachment
Shield
(3) Screws
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.
Gear Housing
Cutting Attachment
Shield Mount
Locking Rod
Fig. 7
Install the cutting attachment shield when using the
unit as a grass trimmer.
Locking Rod Slot
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.
Fig. 9
Install the Cutting Blade
WARNING: To avoid serious personal injury,
always wear gloves while handling or
installing the blade.
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).
3. Place the cutting blade on the output shaft (Fig. 10).
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.
Blade Retainer
Blade Cover
Nut
Cutting
Blade
Remove the Cutting Attachment Shield
See Removing and Installing Cutting Attachment Shield,.
Pilot Hole
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.
Output Shaft
Locking Rod
Shield
Mount
1. Align the shaft bushing hole with the locking rod slot
and insert the locking rod into the shaft bushing hole
(Fig. 8).
Fig. 10
10
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ASSEMBLY INSTRUCTIONS
4. Center the cutting blade on the pilot step of the
• If using a torque wrench and an 5/8 inch socket
tighten to;
output shaft bushing (Fig. 11).
325 - 335 in•lb,
27 - 28 ft.•lb,
37 -38 N•m.
Output Shaft
Pilot Step
• 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).
Output Shaft
Bushing
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.
1/4-1/2 turn
Counterclockwise
Fig. 14
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.
Fig. 12
6. Align the shaft bushing hole with the locking rod
slot and insert the locking rod into the bushing hole
(Fig. 8).
REMOVE THE CUTTING BLADE AND INSTALL
THE CUTTING ATTACHMENT
Remove the Cutting Blade
7. Put the blade retainer and nut on the output shaft.
Make sure that the blade is installed correctly.
WARNING: To avoid serious personal injury,
always wear gloves while handling or
installing the blade.
8. Tighten counterclockwise against the blade while
holding the locking rod (Fig. 13).
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).
Counterclockwise
Fig. 13
11
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ASSEMBLY INSTRUCTIONS
3. While holding the locking rod, loosen the nut on
NOTE: The blade retainer must be installed on the
output shaft in the position shown for the cutting
attachment to work correctly.
the blade by turning it clockwise with a 5/8 inch
closed-end or socket wrench (Fig. 15).
Cutting Attachment
Blade Retainer
Clockwise
Fig. 15
Output Shaft
Bushing
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.
Locking Rod
Fig. 16
Install the Cutting Attachment
6. Remove the locking rod.
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.
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.
OIL AND FUEL INFORMATION
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.
Funnel Spout
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.
Fig. 17
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.
O-Ring
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).
Oil Fill Plug/Dipstick
2. Place the unit on a flat level surface.
3. Remove the oil plug / dipstick from the crankcase
(Fig. 18).
Oil Fill Hole
Fig. 18
12
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OIL AND FUEL INFORMATION
4. Pour the entire bottle of oil into the oil fill hole
FUELING UNIT
WARNING: Gasoline is extremely flammable
(Fig. 19).
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.
Oil Fill
Fig. 19
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.
Gas Can Spout
Fuel Cap
RECOMMENDED FUEL TYPE
Fuel Tank
Old fuel is the primary reason for the unit not
running properly. Be sure to use fresh, clean,
unleaded Gasoline.
Fig. 20
2. Place spout of gas container into the fill hole on the
fuel tank (Fig. 20) and fill tank.
NOTE: This is a four cycle engine. In order to avoid
damage to the unit, do not mix oil with
Gasoline.
WARNING: Add gasoline in a clean, well
ventilated area outdoors. Avoid creating a
source of ignition for spilt fuel.
Definition of Blended Fuels
NOTE: Do not overfill tank.
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.
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.
Using Blended Fuels
If you choose to use a blended fuel, or its use is
5. Move the unit at least 30 ft. (9.1 m) from the fueling
source and site before starting the engine.
unavoidable, follow recommended precautions.
•
•
•
Always use fresh unleaded gasoline
NOTE: Dispose of the old gasoline in accordance to
®
Use the fuel additive STA-BIL or an equivalent.
Federal, State, and Local regulations.
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.
13
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STARTING/STOPPING INSTRUCTIONS
9. Pull the starter rope 1 to 3 pulls until the engine
STARTING INSTRUCTIONS
Cold Start - First Start of the Day or Engine Ran Out
of Fuel
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
WARNING: Operate this unit only in a well
ventilated area outdoors. Carbon monoxide
exhaust fumes can be lethal in a confined
area.
run at full throttle for 30 seconds.
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.
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).
STOP (O)
Start / Stop Control
Starter Rope
START (I)
Throttle Lock-Out
Throttle Control
Fig. 23
Throttle Control
Fig. 21
11. Release the throttle control to the idle position and
begin operation.
4. Place the choke lever in the FULL choke (A)
NOTE: If the engine does not start using these
position (Fig. 22).
procedures, repeat steps 5 through 11 using
NOTE: Slide the choke lever directly above the
appropriate symbol on air filter cover decal
(Fig. 22).
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
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.
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.
Choke Lever
4. While pressing the throttle lock-out, squeeze the
throttle control to the wide open (full throttle)
position (Fig. 21).
Primer Bulb
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
Fig. 22
seconds.
6. While pressing the throttle lock-out, squeeze the
throttle control to the wide open (full throttle)
position (Fig. 21).
NOTE: If the engine does not start using the Engine
Re-start procedures, revert to the Cold Start
procedures.
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.
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
8. Move the choke lever to the PARTIAL (B)
position
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.
(Fig. 22).
NOTE: The engine will not run in the FULL choke (A)
position.
14
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STARTING/STOPPING INSTRUCTIONS
2. To stop the engine, put the Start/Stop Engine
STOPPING INSTRUCTIONS
1. Release your hand from the throttle control (Fig. 23).
Allow the engine to idle.
Control in the STOP [ ] position (Fig. 21).
O
OPERATING INSTRUCTIONS
®
2. While firmly holding the add-on, push it straight into
OPERATING THE CLICK-LINK SYSTEM
®
the Click-Link coupler (Fig. 25).
®
The Click-Link system enables the use of these
NOTE: Aligning the release button with the guide recess
optional add-ons.
will help installation (Fig. 24).
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
Release Button
Click-Link® Coupler
Primary Hole
Upper Shaft Housing
Lower Shaft Housing
WARNING: Read and understand operator’s
manual for add-on prior to operation.
Fig. 25
3. Turn the knob clockwise to tighten (Fig. 26).
Removing the Cutting Attachment or Add-Ons:
1. Turn the knob counterclockwise to loosen (Fig. 24).
CAUTION: Lock the release button in the
primary hole and securely tighten the knob
before operating this unit.
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
90˚ Edging Hole
®
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.
180˚ Edging Hole
Knob
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. 26
Click-Link® Coupler
Release Button
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).
Knob
WARNING: Do not use the cutting blade for
edging or as an edger, severe personal injury
to yourself or others can occur.
Guide Recess
Fig. 24
15
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OPERATING INSTRUCTIONS
Each time the head is bumped, about 1 inch (25.4 mm.)
HOLDING THE TRIMMER
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.
WARNING: Always wear eye, hearing, foot
and body protection to reduce the risk of
injury when operating this unit.
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.
Before operating the unit, stand in the operating position
(Fig. 27). Check for the following:
•
•
•
The operator is wearing eye protection and proper
clothing.
NOTE: Do not rest the Bump Head™ on the ground
The right arm is slightly bent, and the hand is holding
the shaft grip.
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.
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.
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.
Fig. 27
Cut from left to right whenever possible. Cutting to
the right improves the unit's cutting efficiency.
Clippings are thrown away from the operator.
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.
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.
NOTE: Always keep the trimming line fully extended.
Line release becomes more difficult as cutting
line becomes shorter
•
•
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.
Fig. 28
16
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OPERATING INSTRUCTIONS
DECORATIVE TRIMMING
Decorative trimming is accomplished by removing all
vegetation around trees, posts, fences, etc.
WARNING: The blade continues to spin after
the engine is turned off. The coasting blade
can seriously cut you if accidentally touched.
Rotate the whole unit so that the cutting attachment is at
a 30° angle to the ground (Fig. 29).
• 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:
Fig. 29
• Cut at full throttle.
• Swing the unit into material to be cut from your right to
USING THE CUTTING BLADE
your left (Fig. 31).
WARNING: Always wear eye, hearing, foot,
body protection and the strap to reduce the
risk of injury when operating this unit.
• 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.
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.
Fig. 30
• 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.
Fig. 31
17
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MAINTENANCE AND REPAIR INSTRUCTIONS
NOTE: Some maintenance procedures may require
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.
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
Check oil
Page 13
Page 20
Every 10 Hours
Clean and re-oil air filter.
Page 21
1st Change at 10 Hours
Every 25 Hours there after
Every 25 Hours
Change oil
Change oil
Clean Spark Arrestor
Page 20
Page 20
Page 24
10 hours on new engine
Every 50 Hours
Every 50 Hours
Check rocker arm to valve clearance and adjust as required
Check rocker arm to valve clearance and adjust as required
Check spark plug condition and gap
Page 22-23
Page 22-23
Page 24
LINE INSTALLATION
Always use genuine Ryobi 0.095 in. (2.41 mm.)
replacement line. Larger line may make the engine
overheat or fail.
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: 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.
Fig. 33
2. Remove the inner reel from the outer spool (Fig. 32).
3. Remove spring from the inner reel (Fig. 32).
Indexing Teeth
Outer Spool
Spring
Inner Reel
Bolt
Fig. 34
Bump Knob™
Fig. 32
18
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MAINTENANCE AND REPAIR INSTRUCTIONS
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
Fig. 37
Fig. 35
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.
Fig. 38
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).
Fig. 36
8. Insert the ends of the line into the two holding slots
(Fig. 37).
4. Place the spring in the new inner reel.
NOTE: The spring must be assembled on the inner reel
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.
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.
NOTE: The spring must be assembled on the inner reel
before reassembling the cutting attachment.
7. Hold the inner reel in place and install the Bump
Knob by turning clockwise. Tighten securely.
10. Hold the inner reel in place and install the Bump
Knob by turning counterclockwise. Tighten securely.
Replacement Parts:
See Accessories / Replacement Parts on page 24.
19
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MAINTENANCE AND REPAIR INSTRUCTIONS
CHECKING THE OIL LEVEL
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: 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.
CAUTION: Wear gloves to prevent injury
when handling the unit.
The importance of checking and maintaining the proper
oil level in the crankcase cannot be overemphasized.
Check oil before each use:
1. Unplug spark plug boot to eliminate starting
2. Remove the oil fill plug/dipstick.
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. 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.
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).
Oil Fill Plug/Dipstick
O-Ring
Full
Fig. 41
Add 1.4-1.5 Oz.
(41-44 ml)
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.
Top of Dipstick
Fig. 39
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.
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.
O-Ring
Oil Fill Plug/Dipstick
Fill Level
Oil Fill Hole
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).
Fig. 42
6. Replace the oil fill plug/dipstick.
7. Reconnect spark plug boot.
20
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MAINTENANCE AND REPAIR INSTRUCTIONS
AIR FILTER MAINTENANCE
Cleaning the Air Filter
WARNING: To avoid serious personal injury,
always turn your trimmer off and allow it to
cool before you clean or do any maintenance
on it.
Clean and re-oil the air filter every 10 hours of operation.
It is an important item to maintain. Not maintaining the
air filter will VOID the warranty.
1. Open the air filter cover. Push the tab on the right
side of the cover in, pull the air filter cover out and to
the left (Fig. 43).
Fig. 45
NOTE: It may be necessary to remove the fuel cap to
5. Squeeze the filter to spread and remove excess oil
(Fig. 46).
completely remove the air filter cover
2. Remove the air filter (Fig. 43).
Choke Lever
Air Filter
Air Filter Cover
Fig. 46
6. Replace the filter (Fig. 47).
NOTE: If the unit is operated without the air filter, you
will VOID the warranty.
Tab
Choke Lever
Back Plate
Back Plate Slot
Fig. 43
Slots
3. Wash the filter in detergent and water (Fig. 44). Rinse
the filter thoroughly and allow it to dry.
Fig. 47
7. Reinstall the air filter cover. Position the hooks on
the left side of the air filter cover into the slots at the
left side of the back plate (Fig. 47).
NOTE: It may be necessary to remove the fuel cap to
reinstall the air filter cover
8. Swing the cover to the right until the tab on the air
filter cover snaps into place in the slot on the back
plate (Fig. 47).
Fig. 44
4. Apply enough clean SAE 30 motor oil to lightly coat
the filter (Fig. 45).
9. Replace the fuel cap, if removed.
21
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MAINTENANCE AND REPAIR INSTRUCTIONS
Checking the fuel, cleaning the air filter, and adjusting
CARBURETOR ADJUSTMENT
The idle speed of the engine is adjustable. An idle
adjustment screw is reached though a hole in the top of
the engine cover (Fig 48).
the idle speed screw should solve most engine
problems.
If not and:
•
•
•
The engine will not idle,
NOTE: Careless adjustments can seriously damage your
unit. An authorized service dealer should make
carburetor adjustments.
The engine hesitates or stalls on acceleration,
There is a loss of engine power,
Check Fuel
have the carburetor adjusted by an authorized service
dealer.
Old fuel is usually the main reason for the unit not
running properly. Drain and refill the tank with clean,
fresh unleaded fuel prior to doing any adjustments. Refer
to Oil and Fuel Information.
WARNING: When the unit is turned off make
sure the cutting attachment has stopped
before the unit is set down to prevent serious
personal injury.
Clean Air Filter
The condition of the air filter is important to the
operation of the unit. A dirty air filter will restrict air flow
and change the air/fuel mixture. This is often mistaken
for an out of adjustment carburetor. Check the condition
of the air filter before adjusting the idle speed screw.
Refer to Air Filter Maintenance.
ROCKER ARM CLEARANCE
This requires disassembly of the engine. If you feel
unsure or unqualified to perform this, take the unit to an
authorized service center.
Adjust Idle Speed Screw
NOTE: Inspect the valve to rocker arm clearance with a
feeler gauge after the first 10 hours of operation
and then every 50 hours of operation thereafter.
WARNING: The cutting attachment may be
spinning during idle speed adjustment. Wear
protective clothing and observe all safety
instructions to prevent serious personal
injury.
• The engine must be cold when checking or adjusting
the valve clearance.
• This task should be performed inside, in a clean, dust
free area.
If after checking the fuel and cleaning the air
filter the engine still will not idle, adjust the idle speed
screw as follows.
1. Start the engine and let it run at a high idle for a
minute to warm up.
1. Remove the muffler cover by pressing down on the
corner with a flat blade screwdriver (Fig. 49). Slide
the notches on the sides of the muffler cover over
the tabs on the engine cover and remove
2. Release the throttle trigger and let the engine idle. If
the engine stops, insert a small phillips or flat blade
screwdriver into the hole in the engine cover
(Fig. 48). Turn the idle speed screw in, clockwise,
1/8 of a turn at a time (as needed) until the engine
idles smoothly.
Engine Cover
NOTE: The cutting attachment should not rotate when
the engine idles.
Muffler Cover
3. If the cutting attachment rotates when the engine
idles, turn the idle speed screw counterclockwise 1/8
of a turn at a time (as needed), to reduce idle speed.
Fig. 49
2. Remove the two (2) screws on top of the engine
cover with a phillips screwdriver (Fig. 50).
Idle Adjustment Screw
Engine Cover
Top View Of
The Engine
Remove Screws
Muffler
Fig. 50
Fig. 48
22
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MAINTENANCE AND REPAIR INSTRUCTIONS
3. Remove the screw on back of the engine cover
(Fig. 51).
Rocker Arms
Adjusting Nuts
Screw
Feeler Gauge
Gasket
Fig. 51
4. Clean dirt from around the spark plug. Remove the
spark plug from the cylinder head by turning a 5/8 in.
socket counterclockwise.
Fig. 53
Adjusting Nut
5. Disconnect the spark plug wire.
6. Remove the engine cover.
Rocker Arm
7. Clean dirt from around the rocker arm cover.
Remove the screw holding the rocker arm cover with
a large flat blade screwdriver or Torx T25 bit
(Fig. 52). Remove the rocker arm cover and gasket.
.003–.006 in.
(.076–0.152 mm)
Rocker Arm Cover
Feeler Gauge
Valve Stem
Fig. 54
Spark Plug Hole
10. If the clearance is not within specification:
a. Turn the adjusting nut using a 5/16 inch (8 mm)
wrench or nut driver (Fig. 53).
• To increase clearance, turn the adjusting nut
Fig. 52
counterclockwise.
8. Pull the starter rope slowly to bring the piston to the
top of its travel, (known as top dead center). Check
that:
• To decrease clearance, turn the adjusting nut
clockwise.
b. Recheck both clearances, and adjust as necessary.
• The piston is at the top of its travel while looking in
the spark plug hole (Fig. 52).
11. Reinstall the rocker arm cover using a new gasket.
Torque the screw to 20–30 in•lb (2.2–3.4 N•m).
• Both rocker arms move freely, and both valves are
closed.
NOTE: A rocker arm cover gasket, Part # 182099 can be
purchased from your local authorized dealer.
If not, repeat this step.
12. Reinstall the engine cover. Check alignment of the
cover before tightening the screws. Tighten screws.
9. Slide the feeler gauge between the rocker arm and
the valve return spring. Measure the clearance
between the valve stem and rocker arm (Fig 53).
Do both intake and exhaust valves.
13. Replace the muffler cover. Slip the long tabs on the
muffler cover into the engine cover. Slide the
notches on the side of the muffler cover over the
tabs on the engine cover and snap into place
(Fig. 49).
The recommended clearance for both intake and
exhaust is .003 – .006 in. (.076 – 0.152 mm). Use a
standard automotive .005 in. (0.127 mm) feeler gauge.
The feeler gauge should slide between the rocker arm
and valve stem with a slight amount of resistance,
without binding (Fig. 54).
14. Check the spark plug and reinstall. See Replacing
the Spark Plug.
15. Replace the spark plug wire.
23
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MAINTENANCE AND REPAIR INSTRUCTIONS
REPLACING THE SPARK PLUG
SPARK ARRESTOR MAINTENANCE
Use only genuine Ryobi spark plugs. The correct air
gap is 0.025 in. (0.655 mm). Remove the plug after
every 50 hours of operation and check its condition.
1. Stop the engine and allow it to cool. Grasp the plug
wire firmly and pull the cap from the spark plug.
1. Remove the muffler cover. See Rocker Arm
Clearance, Pg. 22.
2. With a flat blade screwdriver or Torx T20 bit, remove
the screw attaching the spark arrestor cover to the
muffler (Fig. 56).
2. Clean dirt from around the spark plug. Remove
the spark plug from the cylinder head by turning
counterclockwise using a 5/8 inch deep socket.
Muffler
Spark Arrestor Screen
3. Replace cracked, fouled or dirty spark plug. Set the
air gap at 0.025 in. (0.655 mm) using a feeler gauge
(Fig. 55).
Tab
Spark Arrestor Cover
Screw
Slot
0.025 in.
(0.655 mm.)
Fig. 56
3. Pull the tab on the spark arrestor cover out of the
muffler. Remove the spark arrestor cover.
4. Remove the spark arrestor screen from the spark
arrestor cover.
5. Clean the spark arrestor screen with a wire brush, or
replace.
Fig. 55
6. Reinstall the spark arrestor screen, spark arrestor
cover, and screw.
CAUTION: Do not sand blast, scrape, or clean
electrodes. Grit in the engine could damage the
cylinder.
ACCESSORIES/REPLACEMENT PARTS
4. Install a correctly gaped spark plug in the cylinder
head. Tighten by turning the 5/8 inch deep socket
clockwise until snug.
4-Cycle Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181786
Oil Fill Plug / Dipstick . . . . . . . . . . . . . . . . . . . . . 182378
Spark Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180852
Spark Arrestor Screen . . . . . . . . . . . . . . . . . . . . . 180890
Replacement Line . . . . . . . . . . . . . . . . . . . . . . . . 612454
Replacement Line Cartridge . . . . . . . . . . . . . . . . 147345
Inner Reel Spring . . . . . . . . . . . . . . . . . . . . . . . . 610636
Outer Spool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 683301
Inner Reel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147495
Bump Knob™ . . . . . . . . . . . . . . . . . . . . . . . . . . . 180814
Fuel Cap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181083
Shoulder Harness . . . . . . . . . . . . . . . . . . . . . . . . 682075
Click-Link Coupler . . . . . . . . . . . . . . . . . . . . . . . 181616
If using a torque wrench torque to;
110-120 in.•lb. (12.3-13.5 N•m).
Do not over tighten.
These replacement parts can be purchased from your
local authorized dealer.
24
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CLEANING AND STORAGE
CLEANING
LONG TERM STORAGE
If the unit will be stored for an extended time,
WARNING: To avoid serious personal injury,
1. Drain all gasoline from the gas tank into a container .
Do not use gas that has been stored for more than
60 days. Dispose of the old gasoline in accordance
with Federal, State, and Local regulations.
always turn your trimmer off and allow it to
cool before you clean or do any maintenance
on it.
Use a small brush to clean off the outside of the unit. Do
not use strong detergents. Household cleaners that
contain aromatic oils such as pine and lemon, and such
as kerosene, can damage plastic housing or handle.
Wipe off any moisture with a soft cloth.
2. Start the engine and allow it to run until it stalls. This
ensures that all gasoline has been drained from the
carburetor.
3. Allow the engine to cool. Remove the spark plug and
put 1 oz. (30 ml) of high quality motor oil into the
cylinder. Pull the starter rope slowly to distribute the
oil. Reinstall the spark plug.
STORAGE
•
Never store the unit with gasoline in the tank where
fumes may reach an open flame or spark.
NOTE: Remove the spark plug and drain all of the oil
from the cylinder before attempting to start the
trimmer after storage.
•
•
Allow the engine to cool before storing.
Store the unit locked up to prevent unauthorized use
or damage.
4. Change the oil. See Changing the Oil, Pg. 20.
Dispose of the old oil in accordance with Federal,
State, and Local regulations.
•
•
Store the unit in a dry, well ventilated area.
Store the unit out of the reach of children.
5. Thoroughly clean the unit and inspect for any loose
or damaged parts. Repair or replace damaged parts
and tighten loose screws, nuts or bolts. The unit is
ready for storage.
Store the unit in one of three (3) positions:
1. The unit hanging by the cutting attachment end.
2. The unit hanging by the engine.
TRANSPORTING
3. The unit setting upright on the cutting attachment
shield and engine feet.
•
•
•
•
Allow the engine to cool before transporting.
Secure the unit while transporting.
Drain the gas tank before transporting.
Tighten gas cap before transporting.
25
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TROUBLESHOOTING
ENGINE WILL NOT START
C A U S E
A C T I O N
Ignition switch is OFF
Turn switch to ON
Empty fuel tank
Fill fuel tank
Primer bulb wasn't pressed enough
Engine flooded
Press primer bulb fully and slowly 5-7 times
Use starting procedure with choke lever in the
RUN position, Pg. 14
Old Gasoline
Drain fuel tank / Add fresh Gasoline
Replace or clean the spark plug
Fouled spark plug
ENGINE WILL NOT IDLE
C A U S E
A C T I O N
Air Filter is Plugged
Replace or clean the air filter
Drain fuel tank / Add fresh Gasoline
Adjust per instruction Pg. 22
Old Gasoline
Improper carburetor adjustment
ENGINE WILL NOT ACCELERATE
C A U S E
A C T I O N
Old Gasoline
Drain gas tank / Add fresh Gasoline
Improper carburetor adjustment
Take to an authorized service dealer for
carburetor adjustment
Cutting head bound with grass
Dirty air filter
Stop the engine and clean the cutting attachment
Clean or replace the air filter
Clogged Spark Arrestor Screen
Clean or Replace. See Pg. 24
ENGINE LACKS POWER OR STALLS WHEN CUTTING
C A U S E
A C T I O N
Old Gasoline
Drain fuel tank / Add fresh Gasoline
Improper carburetor adjustment
Take to an authorized service dealer for
carburetor adjustment
Clogged Spark Arrestor Screen
Clean or Replace. See Pg. 24
CUTTING HEAD WILL NOT ADVANCE LINE
C A U S E
A C T I O N
Cutting head bound with grass
Cutting head out of line
Inner reel bound up
Cutting head dirty
Stop the engine and clean cutting attachment
Refill with new line
Replace the inner reel
Clean inner reel and outer spool
Line welded
Disassemble, remove the welded section
and rewind the line
Line twisted when refilled
Not enough line is exposed
Disassemble and rewind the line
Push the Bump Knob and pull out line until
4 inches (102 mm) of line is outside of the
cutting attachment
If further assistance is required, contact your authorized service dealer.
26
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SPECIFICATIONS
ENGINE
Engine Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air-Cooled, 4-Cycle
Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6 cu. in. (26.2 cc)
Clutch Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Centrifugal
Operating RPM (Trimmer) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,800-7,800 rpm
Operating RPM (Brushcutter) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8,000-9,000 rpm
Idle Speed RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,800-3,200 rpm
Ignition Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electronic
Ignition Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rocker Switch
Valve clearance (intake and exhaust) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .003–.006 in. (.076–.0152 mm)
Spark Plug Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.025 inch (0.655 mm)
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SAE 30 Oil
Crankcase Oil Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.4 oz (100 ml)
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unleaded
Carburetor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diaphragm, All-Position
Starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auto Rewind
Muffler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Baffled with Guard
Throttle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Manual Spring Return
Fuel Tank Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 oz (591 ml)
Fuel Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HD Polyethylene
DRIVE SHAFT & CUTTING ATTACHMENT
Drive Shaft Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Aluminum Tube (Click-Link)
Throttle Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Finger-Tip Trigger
Unit Weight (No Fuel, with J-handle, Cutting attachment shield and Cutting attachment) . . . . . . . 13.5 lbs (6.13 kg)
Cutting Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-Tooth Cutting Blade, Dual String Cutting Head
Line Spool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bump Line Releaser
Line Spool Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 inches (101.6 mm)
Trimming Line Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.095 inch (2.41 mm)
Cutting Path Diameter, Cutting Attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 inches (45.7 cm)
Cutting Path Diameter, Cutting Blade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Inches (204 mm)
Shoulder Harness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Single Quick-Snap
27
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NOTES
28
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CALIFORNIA EMISSION CONTROL WARRANTY STATEMENT
YOUR WARRANTY RIGHTS AND OBLIGATIONS
The California Air Resources Board and Ryobi
MANUFACTURER'S WARRANTY COVERAGE:
Outdoor Products (ROP), are pleased to explain the
emission control system warranty on your 2000 and
later small off-road engine. In California, new small
off-road engines must be designed, built and
equipped to meet the State's stringent anti-smog
standards. ROP must warrant the emission control
system on your small off-road engine for the periods
of time listed below provided there has been no
abuse, neglect or improper maintenance of your small
off-road engine.
• The warranty period begins on the date the engine
or equipment is delivered to the retail purchaser.
• The manufacturer warrants to the initial owner and
each subsequent purchaser, that the engine is free
from defects in material and workmanship which
cause the failure of a warranted part for a period of
two years.
• Repair or replacement of warranted part will be
performed at no charge to the owner at an
Authorized Ryobi Service Center. For the nearest
location, please contact Ryobi at: 1-800-345-8746.
Your emission control system may include parts such
as the carburetor or fuel injection system, the ignition
system, and catalytic converter. Also included may be
hoses, belts, connectors and other emission-related
assemblies.
• Any warranted part which is not scheduled for
replacement, as required maintenance which is
scheduled only for regular inspection to the effect of
"Repair or replace as necessary" is warranted for
the warranty period. Any warranted part which is
scheduled for replacement as required maintenance
will be warranted for the period of time up to the
first scheduled replacement point for that part.
Where a warrantable condition exists, ROP will repair
your small off-road engine at no cost to you including
diagnosis, parts and labor.
The 2000 and later small off-road engines are
warranted for two years. If any emission-related part
on your engine is defective, the part will be repaired
or replaced by ROP.
• The owner will not be charged for diagnostic labor
which leads to the determination that a warranted
part is defective, if the diagnostic work is performed
at an Authorized Ryobi Service Center.
OWNER'S WARRANTY RESPONSIBILITIES:
• As the small off-road engine owner, you are
responsible for the performance of the required
maintenance listed in your operator's manual. ROP
recommends that you retain all receipts covering
maintenance on your small off-road engine, but
ROP cannot deny warranty solely for the lack of
receipts or for your failure to ensure the
• The manufacturer is liable for damages to other
engine components caused by the failure of a
warranted part still under warranty.
• Failures caused by abuse, neglect or improper
maintenance are not covered under warranty.
• The use of add-on or modified parts can be
grounds for disallowing a warranty claim. The
manufacturer is not liable to cover failures or
warranted parts caused by the use of add-on or
modified parts.
performance of all scheduled maintenance.
• As the small off-road engine owner, you should
however be aware that ROP may deny you warranty
coverage if your small off-road engine or a part has
failed due to abuse, neglect, improper maintenance
or unapproved modifications.
• In order to file a claim, go to your nearest
Authorized Ryobi Service Center. Warranty services
or repairs will be provided at all Authorized Ryobi
Service Centers.
• You are responsible for presenting your small
off-road engine to a Ryobi Authorized Service
Center as soon as a problem exists. The warranty
repairs should be completed in a reasonable
amount of time, not to exceed 30 days.
• Any manufacturer approved replacement part
may be used in the performance of any warranty
maintenance or repair of emission related parts
and will be provided without charge to the owner.
Any replacement part that is equivalent in
performance or durability may be used in
non-warranty maintenance or repair and will
not reduce the warranty obligations of the
manufacturer.
If you have any questions regarding your warranty
rights and responsibilities, you should call
1-800-345-8746.
• The following components are included in the
emission related warranty of the engine, air filter,
carburetor, primer, fuel lines, fuel pick up/fuel filter,
ignition module, spark plug and muffler.
29
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LIMITED TWO-YEAR WARRANTY
RYOBI OUTDOOR PRODUCTS warrants each new
ALL IMPLIED WARRANTIES ARE LIMITED IN
DURATION TO THE TWO (2) YEAR WARRANTY
PERIOD OR NINETY (90) DAYS FOR PRODUCTS
USED FOR ANY COMMERCIAL PURPOSE.
RYOBI Product for two (2) years according to the
following terms.
This warranty extends to the original retail purchaser
only and commences on the date of original retail
purchase.
ACCORDINGLY, ANY SUCH IMPLIED WARRANTIES
INCLUDING MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE, OR OTHERWISE, ARE
DISCLAIMED IN THEIR ENTIRETY AFTER THE
EXPIRATION OF THE APPROPRIATE TWO-YEAR
OR NINETY DAY WARRANTY PERIOD. RYOBI’S
OBLIGATION UNDER THIS WARRANTY, IS STRICTLY
AND EXCLUSIVELY LIMITED TO THE REPAIR OR
REPLACEMENT OF DEFECTIVE PARTS, AND ROP
DOES NOT ASSUME OR AUTHORIZE ANYONE TO
ASSUME FOR THEM ANY OTHER OBLIGATION.
SOME STATES DO NOT ALLOW LIMITATIONS ON
HOW LONG AN IMPLIED WARRANTY LASTS, SO
THE ABOVE LIMITATION MAY NOT APPLY TO YOU.
Any part of the RYOBI Product manufactured or
supplied by RYOBI and found in the reasonable
judgement of RYOBI to be defective in material or
workmanship will be repaired or replaced by an
authorized RYOBI service dealer without charge for
parts and labor.
The RYOBI Product including any defective part must
be returned to an authorized service dealer within the
warranty period. The expense of delivering the RYOBI
Product to the dealer for warranty work and the
expense of returning it back to the owner after repair
or replacement will be paid for by the owner. RYOBI’s
responsibility in respect to claims is limited to making
the required repairs or replacements and no claim of
breach of warranty shall be cause for cancellation or
rescission of the contract of sale of any RYOBI
Product. Proof of purchase will be required by the
dealer to substantiate any warranty claim. All warranty
work must be performed by an authorized RYOBI
service dealer.
RYOBI ASSUMES NO RESPONSIBILITY FOR
INCIDENTAL, CONSEQUENTIAL OR OTHER
DAMAGES INCLUDING, BUT NOT LIMITED TO
EXPENSE OF RETURNING THE RYOBI PRODUCT
TO AN AUTHORIZED SERVICE DEALER AND
EXPENSE OF DELIVERING IT BACK TO THE
OWNER, MECHANIC’S TRAVEL TIME, TELEPHONE
OR TELEGRAM CHARGES, RENTAL OF A LIKE
PRODUCT DURING THE TIME WARRANTY SERVICE
IS BEING PERFORMED, TRAVEL, LOSS OR DAMAGE
TO PERSONAL PROPERTY, LOSS OF REVENUE,
LOSS OF USE OF THE PRODUCT, LOSS OF TIME,
OR INCONVENIENCE. SOME STATES DO NOT
ALLOW THE EXCLUSION OR LIMITATION OF
INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO
THE ABOVE LIMITATION OR EXCLUSION MAY NOT
APPLY TO YOU.
This warranty is limited to ninety (90) days from the
date of original retail purchase for any RYOBI Product
that is used for rental or commercial purposes, or any
other income-producing purpose.
This warranty does not cover any RYOBI Product that
has been subject to misuse, neglect, negligence, or
accident, or that has been operated in any way
contrary to the operating instructions as specified in
the RYOBI Operator’s Manual. This warranty does not
apply to any damage to the RYOBI Product that is the
result of improper maintenance or to any RYOBI
Product that has been altered or modified so as to
adversely affect the product's operation, performance
or durability or that has been altered or modified so as
to change its intended use. The warranty does not
extend to repairs made necessary by normal wear or
by the use of parts or accessories which are either
incompatible with the RYOBI Product or adversely
affect its operation, performance or durability.
This warranty gives you specific legal rights, and you
may also have other rights which vary from state to
state.
This warranty applies to all RYOBI Products
manufactured by RYOBI and sold in the United States
and Canada.
To locate your nearest service dealer dial
1-800-345-8746 in the United States or
1-800-265-6778 in Canada.
In addition, this warranty does not cover:
A. Tune-ups - Spark Plugs, Carburetor Adjustments,
Filters
B. Wear items - Bump Knobs, Outer Spools,
Cutting Line, Inner Reels, Starter Pulley,
Starter Ropes, Drive Belts
RYOBI OUTDOOR PRODUCTS
550 N. 54th Street
Chandler, AZ 85226 U.S.A.
RYOBI reserves the right to change or improve the
design of any RYOBI Product without assuming
any obligation to modify any product previously
manufactured.
RYOBI CANADA INC.
275 Industrial Rd
Cambridge, Ontario N1R 6K2 CANADA
SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE.
FOR QUESTIONS CALL 1-800-345-8746 IN U.S.
OR 1-800-265-6778 IN CANADA
OPERATOR’S MANUAL PART NO. 182436
PRINTED IN U.S.A.
REV. A (9561)
10/99
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