Model No. 51973—260000001 & Up
Model No. 51993—260000001 & Up
Form No. 3356-125 Rev. A
WARNING:
To reduce the risk of injury, the user must read and understand the operator’s manual. Save this manual.
English (EN), French (FR), and Spanish (ES)
READ THIS INFORMATION
STOP
1-866-574-9242
CAL
L
Before you use your new trimmer/brushcutter, read the following
helpful hints to get you started.
Fueling
DANGER:
Gasoline is extremely flammable and explosive.
A fire or explosion from gasoline will burn you and
others.
1. Obtain a clean container that is approved for use with gasoline.
2. Mix all of the 2-cycle oil provided with 1 US gallon of 87-octane, unleaded
gasoline (50:1).
3. Fill the trimmer’s gas tank carefully.
Cold Starting vs. Warm Starting
When you restart the trimmer/brushcutter and you are not sure whether the engine is still warm, set
the choke lever to RUN (Choke Open) and pull the starter cord. If the engine does not start within
5 pulls, see To Start a Cold Engine later in this manual.
Flooded Engine
Will the engine start? If not, it may be flooded. Relax, this is easy to correct. Set the choke lever to
RUN (Choke Open). Squeeze the trigger and pull the starter cord quickly for 10 to 12 pulls.
If the engine does not start, refer to Troubleshooting later in this manual or call toll-free at
1-866-574-9242 (US) or 1-866-574-9243 (Canada).
For questions concerning your
trimmer/brushcutter, call us
toll free at 1-866-574-9242.
WARNING: The engine exhaust from this product contains chemicals known to the State
of California to cause cancer, birth defects, or other reproductive harm.
Features ................................................................................................................................................................................... 9-11
Connecting the Attachment to the Upper Shaft ...................................................................................................................13
Removing the Attachment from the Upper Shaft ................................................................................................................
Attaching the Front Handle .................................................................................................................................................
Attaching the Shoulder Strap ...............................................................................................................................................
Attaching the Grass Deflector ..............................................................................................................................................14
Converting from Brushcutter to Trimmer ............................................................................................................................15
Converting from Trimmer to Brushcutter ............................................................................................................................16
Mixing the Fuel ....................................................................................................................................................................
Filling the Tank ....................................................................................................................................................................17
Starting the Product .............................................................................................................................................................
Stopping the Product ............................................................................................................................................................18
Operating the Trimmer ........................................................................................................................................................19
Operating the Brushcutter ....................................................................................................................................................20
Cleaning the Product ............................................................................................................................................................
Servicing the Product ...........................................................................................................................................................21
Replacing the Cutting Line ............................................................................................................................................ 21-22
Replacing the Spool .............................................................................................................................................................22
Checking the Fuel Cap .........................................................................................................................................................23
Cleaning the Air Filter .........................................................................................................................................................
Replacing the Spark Arrester ...............................................................................................................................................
Replacing the Spark Plug .....................................................................................................................................................24
Storing the Product ..............................................................................................................................................................24
Transporting the Product .....................................................................................................................................................24
Thank you for purchasing a Toro product.
We would like for you to be completely satisfied with your new product, so feel free to contact an authorized service dealer
for help with service, genuine Toro parts, or other information you may require.
Whenever you contact an authorized service dealer, always know the model and serial numbers of the product. These num
bers will help the service representative provide exact information about your specific product. You will find the model and
serial number decal located on the motor housing.
For your convenience, write the product model and serial numbers in the space below.
Model No.
Serial No.
-
Read this manual carefully to learn how to operate and maintain your product correctly. Reading this manual will help you
and others avoid personal injury and damage to the product. Although Toro designs, produces, and markets safe, state-of-theart products, you are responsible for using the product properly and safely. You are also responsible for training persons you
allow to use the product about safe operation.
The Toro warning system in this manual identifies potential hazards and has special safety messages that help you and others
avoid personal injury, even death. DANGER, WARNING, and CAUTION are signal words that identify the level of hazard.
However, regardless of the hazard, be extremely careful. One other word, “Note,” highlights information.
Signal Word Explanation
DANGER Indicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury.
WARNINGIndicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.
CAUTIONIndicates a potentially hazardous situation which, if not avoided, may result in minor
or moderate injury. It may also be used to alert against unsafe practices that may cause
property damage.
NoteAdvises you of additional information concerning the operation or maintenance of the
equipment.
4
Introduction
Safety Rules
WARNING:
Read and understand all instructions. Failure to follow all instructions may result in serious personal injury
as well as damage to the product.
This product has been designed and manufactured to
meet or exceed the requirements of the current version of
ANSI B175.3, safety requirements for gasoline-powered
string trimmers and brushcutters.
Physical Condition of the Operator. Do not operate
this product when tired, ill, or under the influence of
alcohol, drugs, or medication.
Clothing Requirements. Always wear long heavy
pants, boots, and gloves. Do not wear loose clothing, jewelry, short pants, sandals, or go barefoot.
Secure hair so that it is above shoulder level to avoid
entanglement in moving parts.
Protective Accessories Requirements. Wear eye
protection marked to comply with ANSI Z87.1
standards when operating this product. Wear hearing
protection during extended periods of operation.
Condition of Trimmer Before Use. Inspect the
product before each 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 in the
position recommended by the manufacturer. Use
only flexible, non-metallic line recommended by the
manufacturer. For example, never use wire or wirerope, which can break off and become a dangerous
projectile.
Proper Stance. Keep firm footing and balance. Do
not overreach. Keep the cutting attachment below
waist level. Keep all parts of your body away from
the rotating cutting attachment and hot surfaces.
Exhaust Gases. Never start or run the product inside
a closed room or building; breathing exhaust fumes
can cause illness or death.
Fueling. Mix and pour fuel outdoors where there are
no sparks and flames. Slowly remove the fuel cap
only after stopping the engine. Do not smoke while
fueling or mixing fuel. Wipe spilled fuel from the
product. Move at least 30 ft. (9 m) away from the
fueling source and site before starting the engine.
Work Area. Clear the area to be cut before each
use. Remove all objects, such as rocks, broken glass,
nails, wire, or string, that 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. Because there still may be a risk of
injury to bystanders from thrown objects, bystanders
should be encouraged to wear eye protection. If you
are approached while operating the product, stop the
engine and the cutting attachment.
Dangerous Environments. To avoid falling, do not
use the product in damp or wet locations.
Controlling the Product. During carburetor adjust-
ments the cutting attachment may spin. Therefore,
you should wear protective equipment and observe
all safety instructions when adjusting the carburetor. For products equipped with a clutch, be sure the
cutting attachment stops turning when the engine
idles. When the product is turned off, make sure the
cutting attachment has stopped before setting down
the product.
Use the Right Product. Use the product for the
intended purpose only.
Condition of Brushcutter Before Use. The handles
shall be mounted according to the manufacturer’s
instructions. Do not attach any blade to a product
without proper installation of all required parts. Failure to use the proper parts can cause the blade to fly
off and seriously injure the operator and/or bystanders. Discard blades that are bent, warped, cracked,
broken, or damaged in any way.
Use the Right Equipment. Always use the barrier
bar on the front handle and the shoulder strap with
the brushcutter.
Blade Thrust. Blade thrust may occur when the
spinning blade contacts an object that it does not immediately cut. A blade thrust can be violent enough
to cause the product and/or operator to be propelled
in any direction, and possibly lose control of the
product. 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.
Stopping the Product. A coasting blade can cause
injury while it continues to spin after the engine is
stopped or throttle is released. Maintain proper control until the blade has completely stopped rotating.
Safety Rules
5
Safety Rules
This engine is equipped with a spark arrester muffler. It is a violation of California Public Resource Code Section
4442 to use or operate this engine without a spark arrester muffler on any forest-covered, brush-covered, or grasscovered land. Other states or federal areas may have similar laws.
This spark ignition system complies with Canadian ICES-002.
Save these instructions. Refer to them frequently and use them to instruct others who may use this product. If you
loan someone this product, loan these instructions also.
Symbols
The following symbols are located on the product. Please study them and learn their meaning. Proper interpretation of these
symbols allows you to operate the product better and safer.
Symbol Name Explanation
Safety Alert Symbol Precautions that involve your safety.
Read the Operator’s Manual Read the operator’s manual before starting or operating this product.
Failure to follow operating instructions and safety precautions in the
operator’s manual can result in serious injury.
Wear Eye and Hearing Protection Wear eye protection which is marked to comply with ANSI Z87.1 as
well as hearing protection when operating this equipment.
Keep Bystanders Away Keep all bystanders at least 50 feet (15 m) away.
Ricochet Thrown objects can ricochet and result in personal injury or property
damage.
No Blade Do not install or use any type of blade on a product displaying this
symbol.
Blade Thrust Beware of blade thrust. Products authorized for blade use will
display this symbol to warn of blade thrust.
Gasoline and Oil Use unleaded gasoline intended for motor vehicle use with an octane
rating of 87 [(R + M) / 2] or higher. This product is powered by a
2-cycle engine and requires pre-mixing gasoline and 2-cycle oil.
6
Symbols
Symbols
The following signal words and meanings are intended to explain the levels of risk associated with this
product.
SYMBOL SIGNAL MEANING
DANGER: Indicates an imminently hazardous situation, which, if not avoided, will
result in death or serious injury.
WARNING: Indicates a potentially hazardous situation, which, if not avoided, could result
in death or serious injury.
CAUTION: Indicates a potentially hazardous situation, which, if not avoided, may result
in minor or moderate injury.
CAUTION:(Without Safety Alert Symbol) Indicates a situation that may result in property
damage.
SERVICE
Servicing requires extreme care and knowledge and should
be performed only by a qualified service technician. For
service we suggest you return the product to your nearest
AUTHORIZED SERVICE CENTER for repair. When
servicing, use only identical replacement parts.
WARNING:
The operation of any power tool can result in foreign objects being thrown into your
eyes, which can result in severe eye damage. Before beginning power tool operation,
always wear safety goggles or safety glasses with side shields and, when needed, a full
face shield. We recommend Wide Vision Safety Mask for use over eyeglasses or standard
safety glasses with side shields. Always use eye protection which is marked to comply
with ANSI Z87.1.
SAVE THESE INSTRUCTIONS
WARNING:
To avoid serious personal injury, do not attempt
to use this product until you read thoroughly and
understand completely the operator’s manual. If you
do not understand the warnings and instructions in the
operator’s manual, do not use this product. Call Toro
customer service for assistance.
Symbols
7
Product Labels
50' 15m
50' 15m
TO START
Set switch to ON
Push bulb 8x
Set choke lever to “FULL”
SQUEEZETHROTTLETRIGGER FULLY(THRUSTEP
7)
andpullstarter handlesharply(no morethan4x)
Set choke lever to “HALF”
Pull starter handle until engine runs,no more
than 6 pulls
.
For Help Call: 1-866-574-9242
Run engine at Full Throttle for 20 seconds, set
choke lever to "RUN"
RYOBIARTWORK
ArtPartNo.:940686006LabelPartNo.:940686006
RefertoDrawingsforDimensions
Rev.000
Product labels and instructions are easily visible to the operator and are located near any area of potential danger.
Replace damaged or lost labels.
Part No. 940686006
Part No. 308207004 (Air Box Cover)
Part No. 940230129Part No. 940657004
Part No. 940627017
8
OFF ON
Part No. 940627032 (Shoulder Strap)
Product Labels
Features
Product Specifications
Name Specification
Engine 25.4 cc Full Crank
Cutting Width
Model No. 51973 18 in.
Model No. 51993 8 in. for brushcutter, 18 in. for trimmer
Line Size .095 in.
Weight
Model No. 51973 13-1/2 lbs.
Model No. 51993 13-1/2 lbs.
Specifications
9
Features
Know Your Trimmer/Brushcutter
See Figure 1.
The safe use of this product requires an understanding of the
information on the tool and in this operator’s manual as well
as a knowledge of the project you are attempting. Before
use of this product, familiarize yourself with all operating
features and safety rules.
Common Features
Engine
The engine is powerful and easy to start. It is effectively
counterbalanced, which allows for less vibration and more
durability.
Dual Line
The dual line permits more efficient cutting than a single
line.
Grass Deflector
The grass deflector helps protect you from flying debris.
Ergonomic Design
The design of the product provides for easy handling. It is
designed for comfort when operating in different positions
and at different angles.
Brushcutter Features
(Model No. 51993)
Blade
The Tri-Arc® blade allows you to brushcut weeds, vines, and
light brush.
Brushcutter Guard
The brushcutter guard helps protect you from the blade and
from flying debris.
Shoulder Strap
The brushcutter includes a shoulder strap that helps support
the product.
Barrier Bar
The handle on the brushcutter contains a barrier bar that
restrains the operator in position and maintains a proper
distance between the operator and the blade.
10
Features
Features
Straight Shaft Trimmer
(Model No. 51973)
Dual
Line
Front Handle
Engine
Straight Shaft
Grass Deflector
Trigger
Handle
Brushcutter
(Model No. 51993)
Blade
Brushcutter
Guard
Straight Shaft
Grass Deflector
Shoulder
Strap
String Head
Assembly
Barrier
Bar
Front Handle
Engine
Trigger
Handle
Figure 1
Features
11
Assembly
Unpacking
This product requires assembly.
Carefully remove the items from the box. Make sure
that all items listed in the packing list are included.
Inspect the product carefully to make sure no breakage
or damage occurred during shipping.
Do not discard the packing material until you have care-
fully inspected and satisfactorily operated the product.
If any parts are damaged or missing, please call toll free
If any parts are damaged or missing, do not
operate the product until the parts are replaced.
Failure to heed this warning could result in seri
-
ous personal injury.
WARNING:
Do not attempt to modify this tool or create
accessories not recommended for use with this
tool. Any such alteration or modification is
misuse and could result in a hazardous condition
leading to possible serious personal injury.
WARNING:
Do not start trimmer until assembly is complete.
Failure to comply could result in accidental
starting and possible serious personal injury.
12
Unpacking
Assembly
Connecting the Attachment to the
Upper Shaft
See Figure 2.
To connect the attachment to the upper shaft:
1. Loosen the knob by turning it counterclockwise.
2. Remove the end cap from the attachment shaft.
3. Align the button on the attachment shaft with the guide
recess on the upper shaft.
4. Slide the attachment shaft into the upper shaft until the
attachment shaft clicks into place.
Note: You may need to turn the attachment shaft to
properly align the two shafts.
5. Tighten the knob securely by turning it clockwise.
Upper
Shaft
Guide
Recess
Button
Attaching the Front Handle
See Figure 3.
To attach the front handle:
1. Remove the slotted Torx™ screws to separate the handle
from the handle support.
2. Press the handle onto the top of the upper shaft, no
less than 10 in. (25.4 cm) from the center of the trigger
handle, angling the handle toward the trigger handle.
3. Place the handle along the upper shaft to a position that
allows for comfortable operation.
4. Place the handle support on the bottom of the tube on the
opposite side of the front handle.
5. Secure the handle with the slotted Torx™ screws.
Slotted
Torx
Screw
Front
Handle
Trigger
Handle
Barrier Bar
(Model Nos.
51993)
Knob
Attachment
Shaft
Figure 2
Removing the Attachment from the
Upper Shaft
See Figure 2.
Follow these steps to remove the attachment from the upper
shaft.
1. Loosen the knob by turning it counterclockwise.
2. Push the button while pulling out the attachment.
Handle
Support
Figure 3
Assembly
13
Assembly
Attaching the Shoulder Strap
Model Nos. 51993
See Figure 4.
To attach the shoulder strap:
1. Connect the latch on the strap to the hanger bracket.
2. Adjust the strap to a comfortable position.
Note: To quickly release the product from the shoulder
strap, sharply pull the quick release tab.
Strap
Quick
Release
Tab
Hanger
Bracket
Attaching the Grass Deflector
WARNING:
The line cutting blade on the grass deflector
is sharp. Avoid contact with the blade. Failure
to avoid contact can result in serious personal
injury.
Note: To protect the operator, always be sure to attach the
grass deflector.
To Attach the Straight Shaft Grass Deflector
See Figure 5.
To attach the straight shaft grass deflector:
1. Remove the screw from the grass deflector.
2. Insert the tab on the mounting bracket in the slot on the
grass deflector.
3. Align the screw hole in the mounting bracket with the
screw hole in the grass deflector.
4. Insert the screw through the mounting bracket and into
the grass deflector.
5. Tighten the screw securely.
Latch
Figure 4
Straight Shaft
Grass Deflector
Tab
Slot
Figure 5
14
Assembly
Assembly
Converting From Brushcutter To
Trimmer
Model No. 51993
To convert from the brushcutter to the trimmer, remove the
blade, remove the brushcutter guard, attach the grass deflector, and install the trimmer head assembly.
To Remove the Blade and Brushcutter Guard
See Figures 6 and 7.
To remove the blade and brushcutter guard:
1. Align the slot in the flanged washer with the slot in the
gear head.
2. Place the head locking tool through the slot in the
flanged washer and gear head.
3. Remove the blade nut by turning it clockwise (left-hand-
ed threads).
4. Remove the cupped washer and the blade.
Head
Locking
Tool
Gear Head
Slot
Figure 6
Flanged
Washer
WARNING:
Be careful when handling the blade. It is sharp.
Failure to heed this warning can result in serious
personal injury.
5. Remove the flanged washer from the gear shaft and
retain it for the trimmer head assembly installation.
6. Remove the three screws securing the brushcutter guard.
7. Remove the brushcutter guard.Note: Store the brushcutter parts together for future use.
To Attach the Grass Deflector
See To Attach the Straight Shaft Grass Deflector earlier
in this manual.
To Install the Trimmer Head Assembly
See Figure 8.
To install the trimmer head assembly:
1. Align the slot in the flanged washer with the slot in the
gear head.
2. Insert the head locking tool through the flanged washer
and gear head.
3. Install the drive shaft and trimmer head assembly onto
the gear shaft by turning the drive shaft counterclockwise
(left-handed threads).
4. Tighten the drive shaft securely.
Brushcutter
Guard
Gear
Head
Flanged
Washer
Slot
Slot
Cupped
Washer
Drive
Shaft
Blade
Blade Nut
Figure 7
Trimmer
Head
Assembly
Assembly
Figure 8
15
Assembly
Converting From Trimmer To Brushcutter
Model No. 51993
To convert from the trimmer to the brushcutter, remove the
trimmer head assembly, remove the grass deflector, attach
the brushcutter guard, and install the blade.
To Remove the Trimmer Head Assembly and Grass
Deflector
See Figures 9 and 10.
To remove the trimmer head assembly and grass deflector:
1. Align the slot in the flanged washer with the slot in the
gear head.
2. Insert the head locking tool through the flanged washer
and gear head.
3. Remove the drive shaft and trimmer head assembly by
turning the drive shaft clockwise (left-handed threads).
4. Remove the flanged washer and retain it for the blade
installation.
5. Remove the screw securing the grass deflector.
6. Remove the grass deflector.
Note: Store the trimmer head assembly parts together
for future use.
To Attach the Brushcutter Guard
See Figure 11.
Note: To protect the operator, always be sure to attach the
brushcutter guard.
To attach the brushcutter guard:
1. Place the guard onto the gear head as shown.
2. Insert the three hex head screws from the bottom through
the guard into the gear head.
3. Tighten the screws securely and torque to 40-50 in.lb.
To Install the Blade
See Figure 12.
To install the blade:
1. Place flanged washer over the gear shaft with the hollow
side toward the brushcutter guard.
2. Center the blade on the flanged washer, making sure the
blade fits flat and the raised hub goes through the hole in
the blade.
3. Install the cupped washer with the raised center away
from the blade.
4. Place the blade nut onto the gear shaft.
5. Insert the head locking tool through the flanged washer
and gear head.
6. Install the blade nut by turning it counterclockwise (left-
handed threads).
7. Tighten the blade nut and torque to 120 in.lb. minimum
(finger tight plus 1/2 turn).
Gear
Head
Brushcutter
Brushcutter
Head
Locking
Guard
Guard
Tool
Flanged
Washer
Slot
Straight Shaft
Grass Deflector
Cupped
Washer
Drive
Shaft
Gear Head
Gear Shaft
Flanged
Washer
Figure 9
Trimmer
Head
Assembly
Figure 10
Hex Head
Screw
Figure 11
Blade
16
Blade Nut
Figure 12
Assembly
Operation
WARNING:
Do not allow familiarity with tools to make you
careless. Remember that a careless fraction of a
second is sufficient to inflict serious injury.
WARNING:
Always wear safety goggles or safety glasses
with side shields when operating power tools.
Failure to do so could result in objects being
thrown into your eyes resulting in possible seri
ous injury.
WARNING:
Do not use any attachments or accessories not
recommended by the manufacturer of this tool.
The use of attachments or accessories not rec-
ommended can result in serious personal injury.
50:1 Gasoline to Oil Mixing Chart
Gasoline Oil
1/2 US gallon 1.3 oz.
1 US gallon 2.6 oz.
2 US gallons 5.2 oz.
1 liter 20 ml
2 liters 40 ml
3 liters 60 ml
-
4 liters 80 ml
5 liters 100 ml
+ =
Filling the Tank
Applications
You may use this tool for the purposes listed below:
Cutting grass, weeds, and light undergrowth
(all models)
Edging along sidewalks and driveways (all models)
Cutting pulpy weeds, vines, and light brush
(Model No. 51993)
Mixing the Fuel
DANGER:
Gasoline is extremely flammable and explosive.
A fire or explosion from gasoline will burn you
and others.
This product is powered by a 2-cycle engine and requires premixing gasoline and 2-cycle oil. The oil mix should be 50:1,
using oil that meets or exceeds JASO-FC specifications.
Follow these steps to mix the fuel.
1. Obtain a clean container that is approved for use with
gasoline.
2. Mix the 2-cycle engine oil provided with unleaded gaso-
line in the container, according to the instructions on the
oil carton.
Note: This engine is certified to operate on unleaded gasoline intended for automotive use with an octane rating of 87
[(R + M) / 2] or higher. Do not use automotive oil or 2-cycle
outboard oil. Store the container out of the reach of children.
WARNING:
Always stop the engine before filling the tank.
Never add fuel to a machine with a running or
hot engine. Move at least 30 ft. (9 m) away from
the refueling site before starting the engine. Do
not smoke while filling the tank.
To fill the tank:
1. Clean the surface around the fuel cap to prevent contami-
nation.
2. Loosen the fuel cap by turning it counterclockwise.
3. Pour the fuel mixture carefully into the tank.
4. Clean and inspect the gasket. Note: Replace the fuel cap if the gasket is damaged.
5. Install the fuel cap and tighten it by turning it clockwise.
WARNING:
Check for fuel leaks. If you find any leaks,
correct the problem before using the product.
6. Wipe spilled fuel from the product.
7. Move at least 30 ft. (9 m) away before starting the
product.
Note: It is normal for the engine to emit smoke during
use.
Operation
17
Operation
WARNING:
The product may throw objects during operation, causing injury to the operator or to bystanders. Always wear suitable eye protection,
long heavy pants, and boots while operating the
product.
Starting the Product
See Figures 13-15.
Starting the product differs depending on whether the engine
is cold or warm. Refer to the label on the air filter cover.
7. Pull starter handle until engine runs, no more than 6
pulls.
8. Run the engine at full throttle for 20 seconds, then set the
choke lever to RUN.
Note: In cooler environments, additional pulls of the
starter handle may be required with the choke lever in the
FULL position.
Switch
Lock-off
Button
Set Choke to FULL
To Start a Warm Engine
To start a warm engine:
1. Lay the product on a flat, bare surface.
2. Toggle the switch to the I (ON) position.
3. Push the primer bulb up to eight times.
4. Set the choke lever to RUN (Choke Open).
5. Pull the starter cord.
Note: If the product does not start, repeat the previous
steps.
Set Choke to RUN
Figure 14
Stopping the Product
See Figure 15.
To stop the product.
1. Release the trigger.
2. Toggle the switch to the O (OFF) position.
18
Trigger
Primer
Bulb
Switch
Starter
Cord
Trigger
Figure 13
Figure 15
Operation
Operation
Operating the Trimmer
WARNING:
Always hold the string trimmer away from the
body, keeping clearance between the body and
the product. Any contact with the housing or
string trimmer cutting head can result in burns
and/or other serious personal injury.
To Operate the Straight Shaft Trimmer
(Model No. 51973)
See Figure 16a.
To operate the straight shaft trimmer:
1. Start the trimmer.
2. Hold the trimmer at waist level with your right hand on
the trigger handle and your left hand on the front handle.
3. Place the product on the right side of your body with the
engine behind and away from your body.
4. Trim grass and weeds in a left-to-right motion with the
line parallel to the ground.
To Advance the Cutting Line
See Figure 16b.
To advance the cutting line:
1. Start the trimmer.
2. Tap the retaining cap lightly on the ground while the mo-
tor is running. The line will only advance with the engine
at full throttle. Do not hold the retaining cap on the
ground.
Note: The line cutting blade on the grass deflector will
cut the line to the proper length.
Note: To help prevent line tangle, tap only once to
lengthen the line. If additional line is required, wait a few
seconds before retapping the retaining cap. Do not allow
the line to wear too short. Keep the cutting line at full
length.
PROPER OPERATING
POSITION
Figure 16a
Retaining
Cap
Figure 16b
Operation
19
Operation
Operating the Brushcutter
(Model No. 51993)
See Figure 17.
To operate the brushcutter:
1. Start the brushcutter.
2. Hold the brushcutter at waist level with your right hand
(arm extended) on the trigger handle and your left hand
on the front handle.
3. Place the product on the right side of your body with the
engine behind and away from your body.
4. Brushcut weeds and vines in a right-to-left motion with
the blade parallel to the ground.
PROPER OPERATING
POSITION
Cutting Tips
See Figure 18.
1. Avoid hot surfaces by always keeping the tool away
from your body. (Proper operating position is shown in
Figures 16a and 17.)
2. Keep the trimmer tilted toward the area being cut; this is
the best cutting area.
3. The straight shaft trimmer cuts when passing the unit
from left to right. This will avoid throwing debris at the
operator. Avoid cutting in the dangerous area shown in
figure 18.
4. Use the tip of string to do the cutting; do not force string
head into uncut grass.
5. Wire and picket fences cause extra string wear, even
breakage. Stone and brick walls, curbs, and wood may
wear string rapidly.
6. Avoid trees and shrubs. Tree bark, wood moldings, sid-
ing, and fence posts can easily be damaged by the string.
Straight Shaft Trimmer
Figure 17
Direction of
Rotation
Dangerous
Cutting Area
Best Cutting
Area
Figure 18
20
Operation
Maintenance
Emissions Maintenance Schedule
Maintenance, replacement, or repair of the emission control device and systems may be performed by any nonroad engine repair establishment or individual.
Emission Part
Fuel Tank Assembly (Includes Fuel
Lines, Fuel Cap, and Fuel Filter)
Air Filter
Spark Arrester
Spark Plug
Inspect before
each use
X
X X
X
X
WARNING:
Use only Toro replacement parts when servicing
this product. Use of any other parts may create a
hazard or cause product damage.
Cleaning the Product
Stop the product before cleaning.
Clean the exterior of the product with a damp cloth.
Avoid using solvents when cleaning plastic parts. Most
plastics are susceptible to damage from various types of
commercial solvents and may be damaged by their use.
Wipe or scrape the trimmer head and spool area when
they accumulate dirt or clippings.
Scrape debris away from air intake vents on both sides of
the motor housing.
CAUTION:
Keeping air intake vents free of grass and debris
prevents motor overheating and possible failure.
Note: Depending on the type of fuel used, the type and
amount of oil used, and/or your operating conditions,
the exhaust port and muffler may become blocked with
carbon deposits. If you notice a power loss with your
gas powered tool, you may need to remove these deposits to restore performance. We highly recommended that
only qualified service technicians perform this service.
Servicing the Product
Check and tighten all fasteners. If any part is damaged or
lost, repair it or replace it.
Clean every
5 hours
Replace every 25
hours or yearly
Clean every 25
hours or yearly
Replacing the Cutting Line
See Figures 19 and 20.
WARNING:
Use of line other than the proper monofilament
cutting line could cause personal injury.
To replace the cutting line.
1. Stop the trimmer.
WARNING:
Make sure the trimmer head stops rotating.
Contact with a rotating trimmer head could
cause personal injury.
2. Remove the spark plug boot. See Figure 23.
3. Remove the retaining cap.
4. Remove the empty spool.
5. Clean the trimmer head thoroughly. Inspect the trimmer
head for any damaged or worn parts.
6. Hold the spool with the spring positioned upward.
7. Insert the end of the new line into the hole in the upper
threaded area of the spool.
8. Wind the line around the spool as indicated by the ar-
rows on the top of the spool until the line reaches the
edge of the spool. Do not wind the line beyond the
edge of the inner ring.
9. Secure the line temporarily by pushing it into one of the
slotted tabs on the spool.
10. Measure six inches of line from the slotted tab and cut
the line at that point.
Maintenance
21
Maintenance
11. Repeat the process for the lower threaded area of the
spool, winding the line and securing it in the slotted tab
opposite the first secured line.
12. Insert the lines into the eyelets on the trimmer head.
13. Place the spool on the drive shaft.
Note: To install the spool, you may need to rotate it
slightly. If the line should tangle or break at the eyelet,
remove the spool, refeed the line through the eyelets,
and reassemble the spool on the trimmer.
14. Release the lines from the tabs by sharply pulling each
line.
15. Push down on the spool to reveal the threads inside the
drive shaft.
16. Thread the retaining cap on the drive shaft.
17. Secure the retaining cap.
WARNING:
An improperly installed retaining cap or spool
could fly off the trimmer. Contact with a thrown
retaining cap or spool could cause personal
injury.
18. Replace the spark plug boot. See Figure 23.
Inner Ring
Upper
Threaded Area
To replace the spool:
1. Stop the trimmer.
WARNING:
Make sure the trimmer head stops rotating when
you release the trigger. Contact with a rotating
trimmer head could cause personal injury.
2. Remove the spark plug boot. See Figure 23.
3. Remove the retaining cap by turning as indicated by the
arrow on the cap.
4. Remove the empty spool.
5. Clean the trimmer head thoroughly. Inspect the trimmer
head for any damaged or worn parts.
6. Remove the lines from the slotted tabs on the spool and
unwind approximately six inches.
7. Secure the lines temporarily by pushing them into the
slotted tabs on the spool.
8. Insert the lines of the new spool into the eyelets on the
trimmer head.
9. Place the spool on the drive shaft.
Note: To install the spool, you may need to rotate it
slightly.
Note: If the line should tangle or break at the eyelet,
remove the spool, refeed the line through the eyelets,
and reassemble the spool on the trimmer.
10. Release the lines from the tabs by sharply pulling each
line.
11. Push down on the spool to reveal the drive shaft.
12. Thread the retaining cap on the drive shaft.
13. Secure the retaining cap.
14. Replace the spark plug boot. See Figure 23.
Slotted
Tab
Lower
Threaded Area
Figure 19
Replacing the Spool
See Figure 20.
Note: For best performance, use only Toro spools (Part No.
AR04118). The spool may wear during normal use of the
line advance feature and may require occasional replacement. Replacement spools are available through your Toro
retailer.
22
Drive
Shaft
Trimmer
Head
Retaining
Cap
Eyelet
Slotted
Tab
Spool
Figure 20
Maintenance
Maintenance
Checking the Fuel Cap
WARNING:
A leaking fuel cap is a fire hazard and must be
replaced immediately.
The fuel cap contains a non-serviceable filter and check
valve. A clogged fuel filter causes poor engine performance.
If performance improves when the fuel cap is loosened,
the check valve may be faulty or the filter may be clogged.
Replace the fuel cap if necessary.
Cleaning the Air Filter
See Figures 21 and 23.
Clean the air filter as indicated by the maintenance schedule.
To clean the air filter:
1. Stop the trimmer.
WARNING:
Make sure the trimmer head stops rotating when
you release the trigger. Contact with a rotating
trimmer head could cause personal injury.
Cleaning the Spark Arrester
See Figure 22.
The spark arrester may need to be replaced after repeated
use. If replacement is necessary, use Toro part number
6300210.
To clean the spark arrester:
1. Locate the spark arrester through the hole on the
muffler-side engine cover.
2. Remove the spark arrester by pulling it out with needle-
nosed pliers.
3. Clean the spark arrester with a small wire brush.
4. Replace the spark arrester.
2. Remove the spark plug boot.
3. Loosen the air filter cover by turning the knob counter-
clockwise.
4. Remove the air filter cover.
5. Remove the air filter.
6. Clean the air filter with warm soapy water.
7. Rinse the air filter and let it dry completely.
8. Work two drops of oil into the air filter.
9. Replace the air filter (fits only one way).
10. Replace the air filter cover.
11. Tighten the air filter cover by turning the knob clockwise.
12. Replace the spark plug boot.
Note: Replace the air filter (Part No. 88048) as
indicated by the maintenance schedule.
Air Filter
Spark
Arrester
Maintenance
Air
Filter
Cover
Knob
Figure 21
23
Maintenance
Replacing the Spark Plug
See Figure 23.
All model numbers included in this manual use an
Champion RZ7C spark plug. Use an exact replacement and
replace annually.
1. Remove the spark plug boot.
2. Loosen the spark plug by turning it counterclockwise
with a socket.
3. Remove the spark plug.
4. Hand thread the new spark plug, turning it clockwise.
5. Tighten with a socket and torque to 170 in.lb. minimum,
190 in.lb. maximum. Do not over tighten.
CAUTION:
Be careful not to cross-thread the spark plug.
Cross-threading will seriously damage the
product.
Spark Plug Boot
Spark
Plug
Storing the Product
Storing the product differs depending on the amount of time
it will be in storage.
Note: If the product includes another attachment, place the
hanger cap on the end of the attachment shaft and hang it up
to store.
To Store the Product Short Term
Follow these steps to store the product short term.
1. Clean all foreign material from the product.
2. Store the product in a well-ventilated place that is inac-
cessible to children.
To Store the Product Long Term
If you do not intend to use the product for more than one
month, follow the storage procedures below.
Follow these steps to store the product long term.
1. Drain all of the fuel from the tank into a container
approved for gasoline. Abide by all federal and local
regulations for the safe storage and handling of gasoline.
2. Run the engine until it stops.
3. Clean all foreign material from the product.
4. Store the product in a well-ventilated place that is inac-
cessible to children.
Note: Keep the product away from corrosive agents
such as garden chemicals and de-icing salts.
Figure 23
Transporting the Product
To transport the product:
1. Drain the fuel mixture into a container that is approved
for use with gasoline.
2. Carry the product by the front handle.
3. Secure the product in your vehicle or on a trailer.
24
Maintenance
Troubleshooting
ProblemPossible CauseSolution
Engine will not start1. Switch set to the O (OFF)
position.
2. No spark2. Remove the spark plug. Reattach the spark plug
3. No fuel3. Push primer bulb until the bulb is full of fuel. If the
4. Flooded engine4. Remove the spark plug. Turn the product so that
5. Starter cord pulls harder
now than when new
1. Set switch to the I (ON) position.
cap and lay the spark plug on the metal cylinder.
Pull the starter cord and watch for a spark at the
spark plug tip. If there is no spark, repeat the test
with a new spark plug.
bulb does not fill, the primary fuel delivery system
is blocked. If the primer bulb fills, the engine may
be flooded. (See next item.)
the spark plug hole is aimed at the ground. Make
sure the choke lever is set to
starter cord 10 to 14 times. This clears excess fuel
from the engine. Clean and reinstall the spark plug.
With the trigger fully depressed, pull the starter
cord 3 times. If the engine does not start, set the
choke lever to FULL and follow normal starting
instructions. If the engine still fails to start, repeat
the procedure with a new spark plug.
5. Contact an authorized service dealer.
RUN and pull the
Engine does not reach full speed
and emits excessive smoke
Line will not advance when us
ing automatic line lengthening
Retaining cap hard to turn when
using automatic line lengthening
Grass wraps around the trimmer
head assembly and the attachment shaft
Oil drips from muffler1. Operating the product at
1. Check oil fuel mixture1. Use fresh fuel and the correct 2-cycle oil mix.
2. Air filter is dirty2. Clean the air filter.
3. Spark arrestor screen is
dirty
-
1. Line welded to itself1. Lubricate with silicone spray.
2. Not enough line on the
spool
3. Line worn too short3. Pull line while alternately pressing down on and
4. Line tangled on spool4. Remove line from spool and rewind.
5. Engine speed too slow 5. Advance line at full throttle.
Screw threads are dirty or
damaged
1. Cutting tall grass at ground
level
2. Operating the product at
part throttle
part throttle
2. Check oil/fuel mixture2. Use fresh fuel and the correct 2-cycle oil mix.
3. Air filter is dirty3. Clean the air filter.
3. Clean the spark arrester.
2. Install more line.
releasing the retaining cap.
Clean the threads and lubricate with grease. If this does
not solve the problem, replace the retaining cap.
1. Cut tall grass from the top down.
2. Operate the product at full throttle.
1. Operate the product at full throttle.
Troubleshooting
25
Warranty
Techtronic Industries North
America, Inc. Gas Trimmer Products
Limited Warranty
TECHTRONIC INDUSTRIES NORTH AMERICA, INC.
warrants to the original retail purchaser that this Gas Trimmer Product is free from defects in material and workmanship and agrees to repair or replace, at our option, any
defective Product free of charge within these time periods
from the date of purchase:
Two years for Gas Trimmer Products, if the Product is
used for personal, family, or household use;
90 days, if Gas Trimmer Products are used for any other
purpose, such as commercial or rental.
Two years for emissions control systems on Gas Trim-
mer Products used for any purpose, as provided below.
Except as provided in the Emission Control Warranty State
ment, this warranty extends to the original retail purchaser
only and commences on the date of original retail purchase.
Instructions for Obtaining Warranty
Service
Any part of the Product manufactured or supplied by
Techtronic Industries North America, Inc. and found in
the reasonable judgement of Techtronic Industries North
America, Inc. to be defective in material or workmanship
will be repaired or replaced by an authorized service dealer
for this product without charge for parts and labor. To locate
your nearest authorized service dealer for this product, con-
tact us Toll free at 1-866-574-9242 (US) or 1-866-574-9243
(Canada).
The Product including any defective part must be returned
to an Authorized Service Dealer for this product within the
warranty period. The expense of delivering the Gas Trim
mer Product to the service 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. Techtronic
Industries North America. Inc.’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
Product. Proof of purchase will be required by the dealer
to substantiate any warranty claim. All warranty work must
be performed by a service dealer authorized by Techtronic
Industries North America, Inc. to service this product.
This warranty does not cover any Gas Trimmer Product that
has been subject to misuse, neglect, negligence, or accident,
or that has been operated in any way contrary to the operat
ing instructions as specified in the Operator’s Manual. This
warranty does not apply to any damage to the Gas Trimmer
Product that is the result of improper maintenance or to any
Gas Trimmer Product that has been altered or modified so
as to adversely affect the products operation, performance
or durability or that has been altered or modified so as to
change its intended use. The warranty does not extend to re
pairs made necessary by normal wear or by the use of parts
or accessories which are either incompatible with the Gas
Trimmer Product or adversely affect its operation, perfor
mance or durability.
-
-
-
-
In addition, this warranty does not cover the following
(except to the extent covered by the emissions control
warranty set forth below):
A. Tune-ups – Spark Plugs, Carburetor Adjustments, Filters
B. Wear Items – Bump Knobs, Outer Spools, Cutting
Lines, Inner Reels, Starter Pulley, Starter Ropes, Drive
Belts, Tines, Felt Washers, Hitch Pins, Mulching Blades,
Blower Fans, Blower and Vacuum Tubes, Vacuum Bag
and Straps, Guide Bars, Saw Chains
Techtronic Industries North America, Inc. reserves the right
to change or improve the design of any Gas Trimmer Prod
uct without assuming any obligation to modify any product
previously manufactured.
ALL IMPLIED WARRANTIES ARE LIMITED IN
DURATION TO THE STATED WARRANTY PERIOD.
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. TECHTRONIC
INDUSTRIES NORTH AMERICA, INC.’S OBLIGATION
UNDER THIS WARRANTY IS STRICTLY AND EXCLUSIVELY LIMITED TO THE REPAIR OR REPLACEMENT OF DEFECTIVE PARTS AND TECHTRONIC
INDUSTRIES NORTH AMERICA, INC. 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.
TECHTRONIC INDUSTRIES NORTH AMERICA, INC.
ASSUMES NO RESPONSIBILITY FOR INCIDENTAL, CONSEQUENTIAL, OR OTHER DAMAGES
INCLUDING, BUT NOT LIMITED TO EXPENSE OF
RETURNING THE GAS TRIMMER PRODUCT TO A
GAS TRIMMER 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 gives you specific legal rights, and you may
also have other rights, which vary, from state to state.
-
This product is manufactured under license from The Toro
Company by Techtronic Industries North America, Inc.
-
26
Warranty
Warranty
FEDERAL AND CALIFORNIA EMISSION CONTROL WARRANTY STATEMENT
YOUR WARRANTY RIGHTS AND OBLIGATIONS
Techtronic Industries North America, Inc. specifically warrants the emissions control system of this Gas Trimmer Product in
accordance with the California and Federal legal requirements described below:
Techtronic Industries North America, Inc. warrants to the original retail purchasers and subsequent purchasers that the non
road engine included with this product has been designed, built and equipped, at the time of sale, to comply with applicable
EPA regulations, and that the engine is free from defects in material and workmanship that would cause it to fail to conform
with the applicable regulations for its warranty period.
The following CARB statement applies to all models:
The California Air Resources Board (CARB), and Techtronic Industries North America, Inc. are pleased to explain the
Emission Control System Warranty on your nonroad or 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. Techtronic Industries North
America, Inc. must (and does) warrant the emission control system on your nonroad or small off-road engine for the
period of time listed above provided there has been no abuse, neglect, or improper maintenance of your nonroad or small
off-road engine.
Your emission control system may include parts such as the carburetor or fuel injection system, the ignition system, the
catalytic converter. Also included may be hoses, belts, and connectors and other emission related assemblies.
Where a warrantable condition exists, Techtronic Industries North America, Inc. will repair your nonroad or small offroad engine at no cost to you, including diagnosis (if the diagnostic work is performed at an authorized dealer), parts, and
labor.
-
Manufacturer’s Warranty Coverage
The 1995 and later small off-road engines are warranted for two years in California from original date of purchase. If
any emission-related part on your engine is defective, the part will be repaired or replaced by Techtronic Industries North
America, Inc. free of charge.
Owner’s Warranty Responsibilities
As the non-road or small off-road engine owner, you are responsible for the performance of the required maintenance
listed in your owner’s manual. Techtronic Industries North America, Inc. recommends that you retain all receipts covering maintenance on your non-road or small off-road engine, but Techtronic Industries North America, Inc. cannot deny
warranty solely for the lack of receipts or for your failure to ensure the performance of all scheduled maintenance.
As the non-road or small off-road engine owner, you should however, be aware that Techtronic Industries North America,
Inc. may deny you warranty coverage if your non-road or small off-road engine or a part has failed due to abuse, neglect,
improper maintenance or unapproved modifications.
You are responsible for presenting your nonroad or small off-road engine to an Techtronic Industries North America, Inc
distribution center or 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 contact an Techtronic Indus
tries North America, Inc., Customer Representative at 1-866-574-9242 (US) or 1-866-574-9243 (Canada)
Emission-related warranted parts for this product include: Carburetor, Spark Plug, Ignition, Air Filter and Fuel Filter.
-
Maintenance Requirements
The owner is responsible for the performance of the required maintenance as defined by Techtronic Industries North America,
Inc. in the owner’s manual.
Limitations
The Emission Control Systems Warranty shall not cover any of the following:
a) repair or replacement required because of misuse or neglect, lack of required maintenance, repairs improperly performed
or replacements not conforming to Techtronic Industries North America, Inc. specifications that adversely affect performance and/or durability, and alterations or modifications not recommended or approved in writing by Techtronic Industries North America, Inc., and
b) replacement of parts and other services and adjustments necessary for required maintenance at and after the first sched-
uled replacement point.
The Emissions Compliance Period referred to on the Emissions Compliance label indicates the number of operating hours for
which the engine has been shown to meet Federal emission requirements. Category C=50 hours, B=125 hours, and A=300
hours.
Warranty
27
1-866-574-9242
CAL
L
Warranty
EMISSIONS MAINTENANCE SCHEDULE AND WARRANTED PARTS LIST
Emissions Parts Inspect Before Clean Every Replace Clean Every Replace Every
Each Use 5 Hours Every 25 Hours 25 Hours 50 Hours
or Yearly or Yearly
ALL EMISSIONS RELATED PARTS ARE WARRANTED FOR TWO YEARS OR FOR THE PERIOD OF TIME PRIOR TO
THE PARTS FIRST SCHEDULED REPLACEMENT WHICHEVER COMES FIRST.
X
X
X ............................. X
X
X
CALL US FIRST
For any questions about operating or maintaining your product,
call the Toro
Your product has been fully tested prior to shipment
to ensure your complete satisfaction.
®
Help Line!
28
Loading...
+ 64 hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.