Model No. 51930—230000001 & Up
Model No. 51932—230000001 & Up
Model No. 51934—230000001 & Up
Model No. 51930A—230000001 & Up
Model No. 51932A—230000001 & Up
Model No. 51934A—230000001 & Up
Model No. 51936—230000001 & Up
Model No. 51938—230000001 & Up
Model No. 51940—230000001 & Up
If you have questions concerning your
trimmer or brushcutter, please call us
STOP
at 1-866-574-9242 (US) or
1-866-574-9243 (Canadá).
Operator’s Manual
WARNING:
To reduce the risk of injury, the user must read and understand the operator’s manual. Save this manual.
English (EN), French (F), and Spanish (ES)
P
STO
READ THIS INFORMATION
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.
gallon of 87-octane, unleaded
2. Mix all of the 2-cycle oil provided with 1
gasoline.
3. Fill the trimmer’s gas tank carefully.
Cold Starting vs. Warm Starting
US
When you restart the trimmer/brushcutter and you are not sure whether the
engine is still warm, set the choke lever to B (Choke Open) and pull the starter
cord. If the engine does not start within 5 pulls, refer to “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 B (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
(Canada)
.
For questions concerning your trimmer/
brushcutter, call us toll free at
1-866-574-9242.
L
L
CA
1-866-574-9242
1-866-574-9242 (US) or 1-866-574-9243
WARNING:
California to cause cancer, birth defects, or other reproductive harm.
Features ....................................................................................................................................................................... 9
Connecting the Attachment to the Upper Shaft.................................................................................................. 12
Removing the Attachment from the Upper Shaft ................................................................................................12
Attaching the Front Handle ................................................................................................................................ 12
Attaching the Shoulder Strap .............................................................................................................................. 12
Attaching the Grass Deflector..............................................................................................................................13
Converting from Brushcutter to Trimmer ...........................................................................................................14
Converting from Trimmer to Brushcutter ...........................................................................................................15
Mixing the Fuel................................................................................................................................................... 16
Filling the Tank................................................................................................................................................... 16
Starting the Product............................................................................................................................................ 17
Stopping the Product .......................................................................................................................................... 17
Operating the Trimmer ....................................................................................................................................... 18
Operating the Brushcutter .................................................................................................................................. 19
Cleaning the Product .......................................................................................................................................... 20
Servicing the Product.......................................................................................................................................... 20
Replacing the Cutting Line ................................................................................................................................. 20
Replacing the Spool ............................................................................................................................................21
Checking the Fuel Cap........................................................................................................................................ 22
Cleaning the Air Filter ........................................................................................................................................22
Cleaning the Spark Arrester................................................................................................................................. 22
Replacing the Spark Plug.....................................................................................................................................23
Storing the Product............................................................................................................................................. 23
Transporting the Product .................................................................................................................................... 23
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
numbers 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-the-art 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. Two other words, “Important” and “Note,”
highlight information.
Signal WordExplanation
DANGER
WARNING
CAUTION
Important
Indicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury.
Indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.
Indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury. It may also be used to alert against unsafe practices that may cause property
damage.
Advises you of important information or instructions vital to the operation or maintenance
of the equipment.
Note
4Introduction
Advises you of additional information concerning the operation or maintenance of the
equipment.
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
■
adjustments 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 Rules5
Important: 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
grass-covered 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.
Save These Instructions
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.
SymbolNameExplanation
Safety AlertIndicates danger, warning, or caution. Attention is required in
order to avoid serious personal injury. May be used in conjunction
with other symbols or pictographs.
Thrown ObjectsThrown objects can cause severe injury. Wear protective clothing
and boots.
Keep Bystanders AwayKeep all bystanders, especially children and pets, at least 50 feet
(15 m) from the operating area.
Blade ThrustBeware of blade thrust. Blade thrust is the sudden sideways, for-
ward, or backward motion of the product that may occur when the
blade jams or catches on an object such as a sapling or a tree
stump.
No BladeDo not install any type of blade on Model No. 51930 or 51936
and Model No. 51932 or 51938. Use only flexible, non-metallic
line recommended by the manufacturer.
Read Operator’s ManualRead the operator’s manual before starting or operating this prod-
uct. Failure to follow operating instructions and safety precautions
in the operator’s manual can result in serious injury.
Eye and Ear ProtectionThrown objects can cause severe eye injury. Wear eye protection
marked to comply with ANSI Z87.1 standards when operating
this product. Wear hearing protection during extended periods of
operation.
Gasoline and OilUse 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 2cycle oil.
6Symbols
ON
OFF
Product Labels
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. 983647-001Part No. 983648-001
To Start
Cold Engine
Warm Engine
1
1
2
2
Choke Position A
3
4
5
3
Choke Position B
4
6
Part No. 984032-001Part No. 985102-001
50' 15m
set SWITCH to ON
Push bulb x 8
Set lever to A
Squeeze trigger Pull rope ONLY 3 times
Move to B
Repeat until run
Repeat until run
50' 15m
I
Part No. 984105-001Part No. 984240-001
50' 15m
Part No. 983780-001Part No. 983961-001 (Shoulder Strap)
A
CHOKE CLOSED
QUICK RELEASE
PULL
B
CHOKE OPEN
Product Labels7
Specifications
NameSpecification
Engine25.4 cc Full Crank
Durability300 hours
Cutting Width
Model Nos. 51930 & 5193617 in.
Model Nos. 51932 & 5193818 in.
Model Nos. 51934 & 519408 in. for brushcutter, 18 in. for trimmer
Line Size.095 in.
Weight
Model Nos. 51930 & 5193612-1/2 lbs.
Model Nos. 51932 & 5193813-1/2 lbs.
Model Nos. 51934 & 5194013-1/2 lbs.
Applications
Use this product for the following applications:
■
Cutting grass, weeds, and light undergrowth (all models)
■
Edging along sideways and driveways (all models)
Cutting pulpy weeds, vines, and light brush (Model Nos. 51934 & 51940)
■
8Specifications
Features
Before using the product, familiarize yourself with all
operating features and safety requirements. However, do
not let familiarity with the product make you careless.
WARNING:
Exercise caution when using the product.
Careless actions, for even a fraction of a second,
can result in serious personal injury.
Your new product is equipped with the following features. See Figure 1.
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 and ease of grasp when operating
in different positions and at different angles.
Brushcutter Features
(Model Nos. 51934 & 51940)
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.
WARNING:
Do not attempt to modify this product or create
accessories not recommended for use with this
product. Any such alteration or modification is
misuse and could result in a hazardous condition
leading to serious personal injury.
Curved Shaft Trimmer Feature
(Model Nos. 51930 & 51936)
Grass Barrier
The grass barrier keeps grass from getting wrapped
around the drive shaft.
Features9
Curved Shaft Trimmer
(Model Nos. 51930 & 51936)
Grass
Barrier
Dual Line
Front Handle
Curved Shaft
Grass Deflector
Engine
Trigger
Handle
Straight Shaft Trimmer
(Model Nos. 51932 & 51938)
Front Handle
Engine
Straight Shaft
Grass Deflector
Blade
Brushcutter
Guard
Brushcutter
(Model Nos. 51934 & 51940)
Shoulder Strap
Barrier
Bar
Trigger
Handle
Front Handle
Engine
Trigger
Handle
Figure 1
10Features
Unpacking
Instructions
■
Carefully remove the product from the box.
Inspect the product carefully to make sure no
■
breakage or damage occurred during shipping.
■
Do not discard the packing material until you have
carefully inspected and satisfactorily operated the
product.
If any parts are damaged or missing, please call
■
toll free 1-866-574-9242 (US) or 1-866-574-9243
(Canada) for assistance.
WARNING:
If any parts are missing, do not operate the
product until the missing parts are replaced.
Failure to do so could result in serious personal
injury.
Straight shaft grass deflector (1) (Model Nos. 51932 &
51938 and Model Nos. 51934 & 51940)
Grass barrier (Model Nos. 51930 & 51936)
Hex head capscrew - 1/4-20 x 2 in. (1)
(Model Nos. 51930 & 51936)
Lock washer (1) (Model Nos. 51930 & 51936)
Flat washer (1) (Model Nos. 51930 & 51936)
Wing nut (1) (Model Nos. 51930 & 51936)
Hex nut (Model Nos. 51930 & 51936)
Oil
Head locking tool (1) (Model Nos. 51934 & 51940)
Shoulder strap (1) (Model Nos. 51934 & 51940)
Storage cap
Unpacking11
Assembly
Connecting the Attachment to the Upper
Shaft
See Figure 2.
Follow these steps 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
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
Handle
Support
Front
Handle
Trigger
Handle
Barrier
Bar
(Model Nos.
51934 &
51940)
Figure 3
Attaching the Shoulder Strap
Model Nos. 51934 & 51940
See Figure 4.
Attachment
Shaft
Knob
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.
Attaching the Front Handle
See Figure 3.
Follow these steps 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.
Follow these steps 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 shoul-
der strap, sharply pull the quick release tab.
Strap
Quick
Release
Tab
Latch
Hanger
Bracket
Figure 4
12Assembly
Attaching the Grass Deflector
Attaching the grass deflector differs depending on the
type of trimmer: curved shaft or straight shaft.
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 Curved Shaft Grass Deflector
Model Nos. 51934 & 51940
See Figure 5.
Follow these steps to attach the curved shaft grass deflector.
1. Press the grass deflector onto the bottom of the
curved shaft as shown.
2. Lift the grass barrier up slightly.
3. Insert the hex head capscrew through the grass
deflector, bracket, and grass barrier.
3. Align the screw hole in the mounting bracket with
the screw hole in the grass deflector.
4. Insert the slotted hex head screw through the mount-
ing bracket and into the grass deflector.
5. Tighten the screw securely.
Tab
Straight Shaft
Grass Deflector
Slot
Figure 6
4. Place the flat washer and lock washer on the hex head
cap screw.
5. Place the wing nut or hex nuton the hex head cap
screw and turn clockwise to secure.
Wing
Curved Shaft
Grass Deflector
Bracket
Line
Cutting
Blade
To Attach the Straight Shaft Grass Deflector
Model Nos. 51932 & 51938 and Model Nos. 51934 &
51940
Hex Head
Cap Screw
Nut
Lock
Washer
Flat
Washer
Grass
Barrier
Hex
Nut
Figure 5
See Figure 6.
Follow these steps to attach the straight shaft grass deflector.
1. Remove the slotted hex head screw from the grass
deflector.
2. Insert the tab on the mounting bracket in the slot on
the grass deflector.
Assembly13
Converting from Brushcutter to Trimmer
Gear Head
Guard
Cupped
Washer
Flanged
Washer
Blade
Blade Nut
Slot
Slot
Brushcutter
Drive
Shaft
Flanged Washer
Gear
Head
Trimmer
Head
Assembly
Model Nos. 51934 & 51940
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 Figure 7 and Figure 8.
Head
Locking
Tool
Follow these steps 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-
handed threads).
4. Remove the cupped washer and the blade.
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.
Figure 7
Figure 8
To Attach the Grass Deflector
Refer to “To Attach the Straight Shaft Grass Deflector”
earlier in this manual.
To Install the Trimmer Head Assembly
See Figure 9.
Follow these steps to install the trimmer head assembly.
1. Align the slot in the flanged washer with the slot in
Figure 9
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.
14Assembly
Converting from Trimmer to Brushcutter
Drive
Shaft
Flanged Washer
Gear
Head
Trimmer
Head
Assembly
Slot
Grass Deflector
Straight Shaft
Model Nos. 51934 & 51940
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 Figure 10 and Figure 11.
Follow these steps 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.
6. Install the blade nut by turning it counterclockwise
(left-handed threads).
7. Tighten the blade nut and torque to 120 in.lb. mini-
mum (finger tight plus 1/2 turn).
Head
Locking
Tool
Figure 10
Note: Store the trimmer head assembly parts
together for future use.
To Attach the Brushcutter Guard
See Figure 12.
Note: To protect the operator, always be sure to attach
the brushcutter guard.
Follow these steps 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 13.
Follow these steps to install the blade.
1. Place flanged washer over the gear shaft with the hol-
low 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.
Brushcutter
Guard
Brushcutter
Guard
Gear Shaft
Cupped
Washer
Blade Nut
Gear Head
Hex Head
Screw
Flanged
Washer
Figure 11
Figure 12
Blade
Figure 13
Assembly15
Operation
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
pre-mixing 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
gasoline in the container, according to the instructions on the oil carton.
Important: 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.
50:1 Gasoline to Oil Mixing Chart
GasolineOil
1/2 US gallon1.3 oz.
1 US gallon2.6 oz.
2 US gallons5.2 oz.
1 liter20 ml
Filling the Tank
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.
Follow these steps to fill the tank.
1. Clean the surface around the fuel cap to prevent con-
tamination.
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 clock-
wise.
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.
2 liters40 ml
3 liters60 ml
4 liters80 ml
5 liters100 ml
+ =
16Operation
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 Figure 14a, Figure 14b, and Figure 15.
Starting the product differs depending on whether the
engine is cold or warm. Refer to the label on the air filter
cover.
To Start a Cold Engine
Follow these steps to start a cold engine.
1. Lay the product on a flat, bare surface.
2. Toggle the switch to the I (ON) position.
3. Push the primer bulb approximately eight times.
4. Set the choke lever to A (Choke Closed).
5. Press the lock-off button and squeeze the trigger.
6. Pull the starter cord three times.
7. Set the choke lever to B (Choke Open).
8. Press the lock-off button and squeeze the trigger.
9. Pull the starter cord.
Note: If the product starts, let it run for 30 seconds
before using it. If the product does not start, repeat
the previous steps.
Set Choke to A
Set Choke to B
Figure 14b
To Start a Warm Engine
Follow these steps 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 B (Choke Open).
5. Do not squeeze the trigger.
6. Pull the starter cord.
Note: If the product does not start, repeat the previ-
ous steps.
Stopping the Product
See Figure 15.
Follow these steps to stop the product.
1. Release the trigger.
2. Toggle the switch to the O (OFF) position.
Switch
Trigger
Lock-off
Button
Primer
Bulb
Starter
Cord
Figure 14a
Switch
Trigger
Figure 15
Operation17
Operating the Trimmer
Retaining
Cap
Operating the trimmer differs, depending on whether
you are using the curved shaft trimmer or the straight
shaft trimmer.
To Operate the Curved Shaft Trimmer
(Model Nos. 51930 & 51936)
See Figure 16a.
Follow these steps to operate the curved 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 right-to-left motion with
the line parallel to the ground.
Figure 16b
To Advance the Cutting Line
See Figure 16c.
Figure 16a
To Operate the Straight Shaft Trimmer
(Model Nos. 51932 & 51938)
See Figure 16b.
Follow these steps 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.
Follow these steps to advance the cutting line.
1. Start the trimmer.
2. Tap the retaining caplightly on the ground while the
motor is running. The line will only advance with
the engine at full throttle. Do not hold the retain-
ing capon 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.
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
Figure 16c
the line parallel to the ground.
18Operation
Operating the Brushcutter
(Model Nos. 51934 & 51940)
See Figure 17.
Follow these steps 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.
Figure 17
Operation19
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 PartInspect before
each use
Clean every 5
hours
Replace every
25 hours or
yearly
Clean every 25
hours or yearly
Fuel Tank Assembly (Includes
X
Fuel Lines, Fuel Cap, and Fuel
Filter)
Air FilterXX
Spark ArresterX
Spark PlugX
Replacing the Cutting Line
WARNING:
When replacing parts other than engine or
emissions parts, Use only Toro replacement parts.
Use of any other parts may create a hazard or cause
product damage.
See Figure 18 and Figure 19.
WARNING:
Use of line other than the proper monofilament
cutting line could cause personal injury.
Follow these steps to replace the cutting line.
Cleaning the Product
Stop the trimmer.
■
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.
1.
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 22.
Remove the retaining cap.
3.
4.
Remove the empty spool.
Clean the trimmer head thoroughly. Inspect the
5.
trimmer head for any damaged or worn parts.
Hold the spool with the spring positioned upward.
6.
7.
Insert the end of the new line into the hole in the
upper threaded area of the spool.
Wind the line around the spool as indicated by the
8.
arrows 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.
Measure six inches of line from the slotted tab and
10.
cut the line at that point.
20Maintenance
11. Repeat the process for the lower threaded area of the
Retaining
Cap
Spool
Trimmer
Head
Drive
Shaft
Eyelet
Slotted
Tab
spool, winding the line and securing it in the slotted
tab opposite the first secured line.
Follow these steps to replace the spool.
1. Stop the trimmer.
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 capon 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 22.
Inner Ring
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 22.
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.
Upper
Threaded Area
Slotted
Tab
Lower
Threaded Area
Figure 18
Replacing the Spool
See Figure 19.
Note: For best performance, use only Toro spools (Part
No. 88046). 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.
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 22.
Figure 19
Maintenance21
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 Figure 20 and Figure 22.
Clean the air filter as indicated by the maintenance
schedule.
Follow these steps 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.
2. Remove the spark plug boot.
3. Loosen the air filter cover by turning the knob coun-
terclockwise.
Air
Filter
Air
Filter
Cover
Knob
Figure 20
Cleaning the Spark Arrester
See Figure 21.
Follow these steps 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 nee-
dle-nosed pliers.
3. Clean the spark arrester with a small wire brush.
4. Replace the spark arrester.
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 indi-
cated by the maintenance schedule.
Spark
Arrester
Figure 21
22Maintenance
Replacing the Spark Plug
See Figure 22.
Model Nos. 51930, 51932, & 51934 use a NGK
BPMR7A or Champion RCJ-6Y spark plug.
Model Nos. 51930A, 51932A, 51934A, 51936, 51938,
& 51940 use a NGK CMR7A spark plug. Use an exact
replacement and replace annually.
Follow these steps to replace the spark plug.
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 clock-
wise.
5. For Model Nos. 51930, 51932: Tighten with a
socket and torque to 170 in.lb. minimum, 190 in.lb.
maximum. Do not over tighten.
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 storage 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
inaccessible 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.
6. For Model Nos. 51930A, 51932A, 51934A, 51936,
51938, & 51940: Tighten with a socket and torque
to 87 in.lb. minimum, 104 in.lb. maximum. Do not
over tighten.
CAUTION:
Be careful not to cross-thread the spark plug. Crossthreading will seriously damage the product.
Spark Plug Boot
Spark
Plug
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
inaccessible to children.
Note: Keep the product away from corrosive agents
such as garden chemicals and de-icing salts.
Important: Abide by all federal and local regulations for the safe storage and handling of gasoline.
Transporting the Product
Follow these steps 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.
Figure 22
Maintenance23
Troubleshooting
ProblemPossible CauseSolution
Engine will not start1. Switch set to the O (OFF)
position.
2. No spark
3. No fuel
4. Flooded engine
5. Starter cord pulls harder now
then when new
1. Set switch to the I (ON) position.
2. Remove the spark plug. Reattach the spark
plug 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.
3. Push primer bulb until the bulb is full of fuel.
If the bulb does not fill, the primary fuel
delivery system is blocked. If the primer bulb
fills, the engine may be flooded. (See next
item.)
4. Remove the spark plug. Turn the product so
that the spark plug hole is aimed at the
ground. Make sure the choke lever is set to B
and pull the 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 A
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.
Engine does not reach full speed
and emits excessive smoke
Line will not advance when
using automatic line lengthening
Retaining caphard 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 mixture
2. Air filter is dirty
3. Spark arrestor screen is dirty
1. Line welded to itself
2. Not enough line on the
spool
3. Line worn too short
4. Line tangled on spool
5. Engine speed too slow
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 mixture
3. Air filter is dirty
1. Use fresh fuel and the correct 2-cycle oil mix.
2. Clean the air filter.
3. Clean the spark arrester.
1. Lubricate with silicone spray.
2. Install more line.
3. Pull line while alternately pressing down on
and releasing the retaining cap.
4. Remove line from spool and rewind.
5. Advance lineat full throttle.
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.
2. Use fresh fuel and the correct 2-cycle oil mix.
3. Clean the air filter.
24Troubleshooting
Notes
Notes25
Warranty
OWT Industries, Inc.
Gas Trimmer Products
Limited Warranty
OWT INDUSTRIES, 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 Trimmer Products used for any purpose, as provided below.
Except as provided in the Emission Control Warranty Statement, 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 OWT Industries, Inc. and found in the reasonable judgement of OWT,
Industries, 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, contact us at Toll free 1866-574-9242 US and Toll free 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 Trimmer 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. OWT Industries. 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 OWT Industries, 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 operating 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 repairs 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, performance or
durability.
In addition, this warranty does not cover the following (except to the extent covered by the emissions control warranty set forth
below):
Pulley, Starter Ropes, Drive Belts
OWT Industries, Inc. reserves the right to change or improve the design of any Gas Trimmer Product without assuming any obliga-
tion to modify any product previously manufactured.
ALL IMPLIED WARRANTIES ARE LIMITED IN DURATION TO THE STATED WARRANTY PERIOD. ACCORD-
INGLY, 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. OWT INDUSTRIES INC.’S OBLIGATION UNDER
THIS WARRANTY IS STRICTLY AND EXCLUSIVELY LIMITED TO THE REPAIR OR REPLACEMENT OF DEFECTIVE PARTS AND OWT 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.
OWT INDUSTRIES 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 OWT Industries, Inc.
26Warranty
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