2
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©1998 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 in the United States or
1-800-265-6778 in Canada
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 OF
THE US PATENTS LISTED BELOW: 5,076,149;
4,901,682; 4,779,405; 4,651,422; 4,505,040; 4,463,498;
4,369,742; 4,342,236; 4,223,441; 2,125,688; D-249,012;
D-239,329;
OTHER PATENTS PENDING.
INTRODUCTION TABLE OF CONTENTS
I. California Emission Regulations . . . . . . . . . . . . . . . . . 3
II. Rules for Safe Operation . . . . . . . . . . . . . . . . . . . . . 4-8
A. Important Safty Information . . . . . . . . . . . . . . . . 4-5
B. Safety and International Symbols . . . . . . . . . . . 6-7
C. Know Your Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
III. Oil and Fuel Information . . . . . . . . . . . . . . . . . . . . . . . 9
IV. Starting/Stopping Instructions . . . . . . . . . . . . . . . . . 10
V. Operating Instructions . . . . . . . . . . . . . . . . . . . . 11-13
A. Operating the Click-Link System . . . . . . . . . . . . . 11
B. Holding the Trimmer . . . . . . . . . . . . . . . . . . . . . . 12
C. Adjusting the D Handle . . . . . . . . . . . . . . . . . . . . 12
D. Adjusting Trimming Line Length . . . . . . . . . . . . . 12
E. Tips for Best Trimming Results . . . . . . . . . . . . . . 13
F. Decoritive Trimming . . . . . . . . . . . . . . . . . . . . . . . 13
VI. Maintenance and Repair Instructions . . . . . . . . . 13-18
A. Maintenance Schedule . . . . . . . . . . . . . . . . . . . . 13
B. Line Installation . . . . . . . . . . . . . . . . . . . . . . . 14-15
C. Installing a Prewound Reel . . . . . . . . . . . . . . . . . 15
D. Air Filter Maintenance . . . . . . . . . . . . . . . . . . . . . 16
E. Carburetor Adjustment . . . . . . . . . . . . . . . . . . . . 17
F. Replacing the Spark Plug . . . . . . . . . . . . . . . . . . 18
G. Accessories/Replacement parts . . . . . . . . . . . . . 18
VII. Cleaning and Storage . . . . . . . . . . . . . . . . . . . . . . . . 19
VIII. Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . 20
IX. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
X. Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-24
CONTENTS OF CARTON
This carton should include the following:
• Model 2079r Trimmer
• Operator's Manual
• Parts Manual
• Product Registration Card
• Bottle of 2-Cycle Oil
CALIFORNIA EMISSION REGULATIONS
3
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 #181696 Spark Arrestor Kit.
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 unit meets the 1995 to 1998 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!
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 dan-
ger, 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.
RULES FOR SAFE OPERATION
4
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 ft. (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 neutral 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.
• Avoid creating a source of ignition for spilled fuel. Do
not start the engine until fuel vapors dissipate.
• 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.
• Mix and 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.
• Move the unit at least 30 ft. (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 Z87.1-1989 standards, and
ear/hearing protection when operating this unit.
Wear a face or dust mask if the operation is dusty.
Long sleeve shirts are recommended.
• The cutting attachment shield must always be in
place while operating the unit as a trimmer. 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.
RULES FOR SAFE OPERATION
5
• The cutting attachment may be spinning during
carburetor adjustments. Wear your protective
equipment and observe all safety instructions. For
units equipped with a clutch, be sure the cutting
attachment stops turning when the engine idles.
When the unit is turned off make sure the cutting
attachment has stopped before the unit is set down.
• Adjust the D handle 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 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 when
servicing this unit. These parts are available from
your authorized service dealer. Do not use parts,
accessories or attachments not authorized by Ryobi
for this unit. Doing so 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.
• Wear heavy, long pants, boots and gloves. Do not
wear loose clothing, jewelry, short pants, sandals or
go barefoot. Secure hair above shoulder level.
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 D-0.0001.6827 vlS TD(transpoparts.)Tj/F7 1 Tf-1.6827 -1.482 TD0 Tc(¥)Tj/F8 1 Tf1.6827 0 TD-0.0001 To secure D- fuauttiken bu bootd jeworijT*bootd jng or
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 before starting or operating this unit. Failure to follow operating
instructions and safety precautions in the operator's manual 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: Wear safety glasses or goggles that are marked as meeting ANSI Z87.1-1989 standards,
and ear/hearing protection when operating this unit.
• KEEP BYSTANDERS AWAY
WARNING: Keep all bystanders, especially children and pets, at least 50 feet (15 m.) from the
trimming area.
• PRIMER BULB
Push primer bulb, fully and slowly, 5 to 7 times.
• UNLEADED FUEL
Always use clean, fresh unleaded fuel.
• OIL
Refer to operator's manual for the proper type of oil.
RULES FOR SAFE OPERATION
6
SYMBOL MEANING
• 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 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 string guard. To prevent serious injury, do not touch line cutting blade.
• CHOKE CONTROL
A. START position.
B. RUN position.
• 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: To avoid serious personal injury do not install a blade on this unit as configured.
Brushcutter Kit # 300026 is available to convert this model into a trimmer / brushcutter.
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 Z87.1-1989 standards, and a full face shield
when needed.
RULES FOR SAFE OPERATION
7
APPLICATIONS
As a trimmer;
• Cutting grass and light weeds.
• Edging
• Decorative trimming around trees, fences,
etc.
With optional brushcutter kit;
• Cutting weeds and light bush of up to 1/2
inch in diameter.
Other optional accessories may be used with
the 2079r. See list of add-ons on page 11.
OIL AND FUEL INFORMATION
9
OIL AND FUEL MIXING INSTRUCTIONS
Old and/or improperly mixed fuel is usually the
main reasons for the unit not running properly. Be
sure to use fresh, clean unleaded fuel. Follow the
instructions carefully for the proper fuel/oil mixture.
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. It forms
acids when stored. When using alcohol-blended fuel,
use fresh fuel (less than 60 days old).
Using Blended Fuels
If you choose to use a blended fuel, or its use is
unavoidable, follow recommended precautions.
• Always use fresh fuel mix per your operator's
manual.
• Use the fuel additive STA-BIL
®
or an equivalent.
• Always agitate the fuel mix before fueling the unit.
• Drain the tank and run the engine dry before storing
the 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 fuel tank.
CAUTION: For proper engine operation and
maximum reliability, pay strict attention to the
oil and fuel mixing instructions on the 2-cycle
oil container. Using improperly mixed fuel can
severely damage the engine.
Thoroughly mix the proper ratio of RYOBI
2-cycle engine oil with unleaded gasoline in a
separate fuel can. Use a 32:1 fuel/oil ratio. Do
not mix them directly in the engine fuel tank. See the
table below for specific gas and oil mixing ratios.
NOTE: One gallon (3.8 liters) of unleaded gasoline mixed
with one 4 oz. (120 ml.) bottle of RYOBI 2 Cycle
OIL makes a 32:1 fuel/oil ratio.
WARNING: Gasoline is extremely flammable.
Ignited Vapors may explode. 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 at a distance
from the area.
WARNING: Remove fuel cap slowly to avoid
injury from fuel spray. Never operate the unit
without the fuel cap securely in place.
WARNING: Add fuel in a clean, well
ventilated area outdoors. Wipe up any spilled
fuel immediately. Avoid creating a source of
ignition for spilt fuel. Do not start the engine
until fuel vapors dissipate.
NOTE: Dispose of the old fuel/oil mix in accordance to
Federal, State, and Local regulations.
+
UNLEADED GAS RYOBI 2 CYCLE OIL
1 US. GALLON + 4.0 FL. OZ.
(3.8 LITERS) (120 ml)
1 LITER + 30 ml
MIXING RATIO - 32:1
STARTING/STOPPING INSTRUCTIONS
10
Starter Rope
Throttle Control
Fig. 3
STOPPING INSTRUCTIONS
1. Release your hand from the throttle control (Fig. 3).
Allow the engine to cool down by idling.
2. Put the Start / Stop Engine Control in the STOP
position (Fig. 1).
STARTING INSTRUCTIONS
WARNING: Avoid accidental starting. Be in
the starting position when pulling the starter
rope (Fig. 3). The operator and unit must be
in a stable position while starting to avoid
serious personal injury.
NOTE: When using the shoulder harness, have it on and
adjusted, but not clipped to the support fitting
prior to starting unit.
1. Mix gas with oil. Fill fuel tank with fuel/oil mixture.
See Oil and Fuel Mixing Instructions on Pg. 9.
2. Put the Start / Stop Engine Control in the
START
position (Fig. 1).
3. Fully press and release primer bulb slowly 5 to 7
times. Fuel should be felt and visible in the bulb
(Fig. 2). If fuel hasn’t entered the bulb, press three
more times, or until it does.
4. Place the choke lever in the
START position (A)
(Fig. 2).
5. With the unit on the ground, squeeze the throttle
control and hold. Pull starter rope briskly (Fig. 3).
Continue pulling until the engine sounds as though it
wants to run (normally 2 to 5 pulls).
NOTE: Squeeze the throttle control until the engine has
started and warmed up.
6. Place the choke lever in the
RUN position (B)
(Fig. 2).
7. Pull starter rope briskly 1 to 3 times to start the
engine (Fig. 3).
8. If the engine does not start, repeat steps
4 through 7.
NOTE: If the engine floods while trying to start, place the
choke lever in the RUN position (B). Squeeze the
throttle control. Pull the starter rope briskly. The
engine should start within three (3) to eight (8)
pulls.
9. Squeeze the throttle control to warm up engine for 5
to 10 seconds. Place the choke lever in the
RUN
position (B) (Fig. 2).
10. Stand in the operating position and clip the shoulder
to the support fitting
NOTE: Choking is unnecessary when starting a warm
engine. Put the Start / Stop Engine Control in the
START position (Fig. 1), and start in RUN (B)
(Fig. 2).
WARNING: Operate this unit only in a well
ventilated area outdoors. Carbon monoxide
exhaust fumes can be lethal in a confined
area.
Fig. 1
Fig. 2
Start / Stop Control
Primer Bulb
Run (B)
Start (A)
Choke Lever
11
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.
NOTE: For edging with Click-Link®models, lock the
release button of the cutting attachment into the
90° edging hole or the 180° edging hole (Fig. 6).
12
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 operating.
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
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. 7). 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
handle.
• The unit is below waist level.
• The cutting attachment is parallel to the ground and
easily contacts the vegitation to be cut without the
operator having to bend over.
OPERATING INSTRUCTIONS
13
14
MAINTENANCE AND REPAIR INSTRUCTIONS
Indexing Teeth
Inner Reel
Spring
Outer Spool
Bump Knob™
LINE INSTALLATION
Always use genuine Ryobi 0.095 inch (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
NOTE: Replacement line Part # 612454, or a prewound
reel, Part # 147345 can be purchased from your
local authorized dealer.
Winding the Existing Inner Reel
1. Hold the outer spool with one hand and unscrew the
Bump Knob™ counterclockwise (Fig. 11). Inspect
the bolt inside the Bump Knob™ to make sure it
moves freely. Replace the Bump Knob™ if damaged.
NOTE: A Bump Knob™, Part # 180814 can be
purchased from your local authorized dealer.
Fig. 11
2. Remove the inner reel from the outer spool (Fig. 11).
3. Remove spring from the inner reel (Fig. 11).
NOTE: An inner reel spring, Part # 610636 can be
purchased from your local authorized dealer.
4. Use a clean cloth to clean the the inner reel, spring,
shaft, and inner surface of the outer spool (Fig. 12).
Fig. 12
5. Check the indexing teeth on the innerreel and outer
spool for wear (Fig. 13). If necessary, remove burrs
or replace the reel and spool.
NOTE: A cutting attachment outer spool, Part # 147494
can be purchased from your local authorized
dealer.
Fig. 13
6. Take approximately 25 feet (7.6 m) of new 0.095 inch
diameter 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. 14). 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.
Fig. 14
15
MAINTENANCE AND REPAIR INSTRUCTIONS
10. Hold the inner reel in place and install the Bump
Knob™ by turning clockwise. Tighten securely.
Installing a Prewound Reel
1. Hold the outer spool with one hand and unscrew the
Bump Knob™ counterclockwise (Fig. 11). 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. 11)
3. Remove the spring from the old inner reel (Fig. 11).
4. Place the spring in the new inner reel (Fig. 11).
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. 17).
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.
Carburetor/ Air
Filter Cover
16
3. Wash the filter in detergent and water (Fig. 20). Rinse
the filter thoroughly and allow it to dry.
6. Reinstall the filter (Fig. 19) and air filter cover
(Fig. 18).
4. Apply enough clean motor oil to lightly coat the filter
(Fig. 21).
5. Squeeze the filter to spread and remove excess oil
(Fig. 22).
Air Filter
2. Remove the air filter (Fig. 19).
AIR FILTER MAINTENANCE
Clean and re-oil the air filter every 10 hours of operation.
NOTE: Operating the unit without the air filter and
air filter/muffler cover assembly, will VOID the
warranty.
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.
1. Remove the carburetor/air filter cover by pushing on
the tab on top of the cover (Fig. 18).
Tab
MAINTENANCE AND REPAIR INSTRUCTIONS
CARBURETOR ADJUSTMENT
The idle speed of the engine is adjustable though the Air
filter/muffler cover (Fig 23).
NOTE: Careless adjustments can seriously damage your
unit. An authorized service dealer should make
carburetor adjustments.
Check Fuel Mixture
Old and/or improperly mixed fuel is usually the reason
for the unit not running properly. Drain and refill the tank
with fresh, properly mixed fuel prior to making any
adjustments. Refer to Oil and Fuel Information, Pg. 9.
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.
Adjust Idle Speed Screw
WARNING: The cutting attachment may be
spinning during carburetor adjustments. Wear
your protective equipment and observe all
safety instructions. For units equipped with a
clutch, be sure the cutting attachment stops
turning when the engine idles. When the unit is
turned off make sure the cutting attachment
has stopped before the unit is set downIf after
checking the fuel mixture 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.
2. Release the throttle trigger and let the engine idle. If
the engine stops, turn the idle speed screw in
clockwise with a small phillips or flat blade
screwdriver 1/8 of a turn at a time (as needed), until
the engine idles smoothly (Fig. 23).
MAINTENANCE AND REPAIR INSTRUCTIONS
17
MAINTENANCE AND REPAIR INSTRUCTIONS
18
REPLACING THE SPARK PLUG
Use a Champion RCJ6Y spark plug (or equivalent). The
correct air gap is 0.025 in. (0.655 mm.). Remove the plug
after every 50 hours of operation to 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.
2. Clean dirt from around the spark plug. Remove the
spark plug from the cylinder head by turning a 5/8 in.
socket counterclockwise.
Note: Replace cracked, fouled or dirty spark plug.
3. Set the air gap at
0.025 in. (0.655 mm.) using a
feeler gauge (Fig. 24).
CAUTION: Do not sand blast, scrape, or
clean electrodes. Grit in the engine could
damage the cylinder.
0.025 in.
(0.655 mm.)
Fig. 24
ACCESSORIES/REPLACEMENT PARTS
2-Cycle Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147543
Spark Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181765
Replacement Line . . . . . . . . . . . . . . . . . . . . . . . 612454
Replacement Line Cartridge . . . . . . . . . . . . . . . 147345
Inner Reel Spring . . . . . . . . . . . . . . . . . . . . . . . . 610636
Bump Head Knob Assembly . . . . . . . . . . . . . . . 180814
Fuel Cap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180000
The 2079r trimmer is convertible to a brushcutter with
the optional Brush Blade Kit. The kit contains all the
necessary parts to safely convert the trimmer to
brushcutter capability.
NOTE: A Brush Blade Kit, Part # 300026 can be
purchased from your local authorized dealer.
4. Install a correctly gaped spark plug in the cylinder
head. Tighten by turning the 5/8 in. socket clockwise
until snug.
If using a torque wrench torque to;
110-120 in.•lb. (12.3-13.5 N•m).
Do not over tighten.
CLEANING AND STORAGE
19
LONG TERM STORAGE
If the unit will be stored for an extended time,
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
to Federal, State, and Local regulations.
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.
NOTE: Remove the spark plug and drain all of the oil
from the cylinder before attempting to start the
trimmer after storage.
4. 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.
TRANSPORTING
• Allow the engine to cool before transporting.
• Secure the unit while transporting.
• Drain the gas tank before transporting.
• Tighten gas cap before transporting.
CLEANING
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.
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.
STORAGE
• Never store the unit with gasoline in the tank where
fumes may reach an open flame or spark.
• Allow the engine to cool before storing.
• Store the unit locked up to prevent unauthorized use
or damage.
• Store the unit in a dry, well ventilated area.
• Store the unit out of the reach of children.
TROUBLESHOOTING
20
If further assistance is required, contact your authorized service dealer.
CAUSE ACTION
Cutting head bound with grass Stop the engine and clean cutting attachment
Cutting head out of line Refill with new line
Inner reel bound up Replace the inner reel
Cutting head dirty Clean inner reel and outer spool
Line welded Disassemble, remove the welded section
and rewind the line
Line twisted when refilled Disassemble and rewind the line
Not enough line is exposed Push the Bump Knob and pull out line until
4 in. (102 mm.) of line is outside of the
cutting attachment
CAUSE ACTION
Old or improperly mixed fuel Drain gas tank / Add fresh fuel mixture
Improper carburetor adjustment Take to an authorized service dealer for
carburetor adjustment
CAUSE ACTION
Ignition switch is OFF Turn switch to ON
Empty gas tank Fill fuel tank
Primer bulb wasn't pressed enough Press primer bulb fully and slowly 5-7 times
Engine flooded Use starting procedure with choke lever in the
RUN position, Pg. 10
Old or improperly mixed fuel Drain fuel tank / Add fresh fuel mixture
Fouled spark plug Replace or clean the spark plug
ENGINE WILL NOT START
ENGINE WILL NOT IDLE
ENGINE WILL NOT ACCELERATE
ENGINE LACKS POWER OR STALLS WHEN CUTTING
CAUSE ACTION
Air Filter is Plugged Replace or clean the air filter
Old or improperly mixed fuel Drain gas tank / Add fresh fuel mixture
Improper carburetor adjustment Adjust per instruction Pg. 17
CAUSE ACTION
Old or improperly mixed fuel Drain gas tank / Add fresh fuel mixture
Improper carburetor adjustment Take to an authorized service dealer for
carburetor adjustment
Cutting head bound with grass Stop the engine and clean the cutting attachment
Dirty air filter Clean or replace the air filter
CUTTING ATTACHMENT WILL NOT ADVANCE LINE
Engine Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air-Cooled, 2-Cycle
Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.25 in. (31.75 mm.)
Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4 cu. in. (22.5 cc.)
Clutch Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Centrifugal
Operating RPM (Trimmer) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,500-9,000 rpm
Idle Speed RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,400-3,400 rpm
Ignition Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electronic
Ignition Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Toggle Switch
Spark Plug Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.025 in. (0.655 mm.)
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel/Oil Mixture
Fuel/Oil Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32:1
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 Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Aluminum Tube
Throttle Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Finger-Tip Trigger
Unit Weight (No fuel, with cutting attachment, cutting attachment shield and D handle) . . . . . . . . . . 11 lbs. (4.9 kg.)
Cutting Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dual String Cutting Head
Line Spool Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 in. (101.6 mm.)
Trimming Line Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.095 in. (2.41 mm.)
Cutting Path Diameter, Cutting Attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 in. (44 cm.)
SPECIFICATIONS
21
ENGINE
DRIVESHAFT & CUTTING ATTACHMENT
NOTES
22
23
The California Air Resources Board and Ryobi Outdoor
Products (ROP), are pleased to explain the emission
control system warranty on your 1995 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 offroad engine for the periods of time listed below provid
ed there has been no abuse, neglect or improper
maintenance of your small off-road engine.
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.
Where a warrantable condition exists, ROP will repair
your small off-road engine at no cost to you including
diagnosis, parts and labor.
The 1995 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
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 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.
• 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.
If you have any questions regarding your warranty rights
and responsibilities, you should call 1-800-345-8746.
MANUFACTURER'S WARRANTY COVERAGE:
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.
CALIFORNIA EMISSION CONTROL WARRANTY STATEMENT
YOUR WARRANTY RIGHTS AND OBLIGATIONS
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.
ACCORDINGLY, ANY SUCH IMPLIEDWARRANTIES
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 AUTHORIZEANYONE TO
ASSUME FOR THEM ANY OTHER OBLIGATION.
SOME STATES DO NOT ALLOW LIMITATIONS ON
HOW LONG AN IMPLIEDWARRANTY LASTS, SO THE
ABOVE LIMITATION MAY NOT APPLY TO YOU.
RYOBI ASSUMES NO RESPONSIBILITY FOR
INCIDENTAL, CONSEQUENTIAL OR OTHER
DAMAGES INCLUDING, BUT NOT LIMITEDTO
EXPENSE OF RETURNING THE RYOBI PRODUCT
TO AN AUTHORIZED SERVICEDEALER 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 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.
RYOBI OUTDOOR PRODUCTS
550 N. 54th Street
Chandler, AZ 85226 U.S.A.
RYOBI CANADA INC.
275 Industrial Rd
Cambridge, Ontario N1R 6K2 CANADA
RYOBI OUTDOOR PRODUCTS warrants each new
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.
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.
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.
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 reserves the right to change or improve the
design of any RYOBI Product without assuming
any obligation to modify any product previously
manufactured.
LIMITED TWO-YEAR WARRANTY
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. 182218 REV. A (7869)
PRINTED IN U.S.A. 11/98
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