DeWalt DW12A-O1T9739 User manual

If you have questions or comments, contact us.
1-855-971-1123
Instruction Manual
Form No. 769-26879
(November 21, 2023)
DW12A-O1T9739
DW12AVP2R3739
Self-Propelled Mower

2
English (original instructions) 3
Spanish (Español) 19
© 2023 DEWALT. DEWALT® and GUARANTEED TOUGH® are registered trademarks of the DEWALT
Industrial Tool Co., used under license. All rights reserved. The yellow and black color scheme is a
trademark for DEWALT Power Tools and Accessories.

3
SAFE OPERATION PRACTICES
WARNING!Read all safety warnings and all instructions. Failure to follow the
warnings and instructions may result in electric shock, fire, and/or seriousinjury.
NOTE: This Operator's Manual covers several models. Features may vary by model. Not all features in this manual are
applicable to all models and the model depicted may differ from yours.
If you have any questions or comments about this or any DeWALT tool, call us toll free at: 1-855-971-1123.
Definitions: Safety Alert Symbols and Words
This instruction manual uses the following safety alert symbols and words to alert you to hazardous situations and
your risk of personal injury or property damage.
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.
(Used without word) Indicates a safety related message.
NOTICE: Indicates a practice not related to personal injury which, if not avoided, may result in
propertydamage.

4
General Information
1. Read, understand, and follow all instructions on
the mower and in the manual(s) before attempting
to assemble and operate. Keep this manual in a
safe place for future and regular reference and for
ordering replacement parts.
2. Be familiar with all controls and their
proper operation.
3. Never allow children under 14 years of age to
operate this mower. Children 14 and over should
read and understand the instructions and safe
operation practices in this manual and on the
mower and should be trained and supervised by
an adult.
4. Never allow adults to operate this mower without
proper instruction.
5. Store mower in a dry, clean area. Do not store next
to corrosive materials, such as fertilizer.
6. If situations occur which are not covered in this
manual, use care and good judgment. Contact your
customer service representative for assistance.
7. According to the U.S. Consumer Products Safety
Commission (CPSC) and the U.S. Environmental
Protection Agency (EPA), this product has an
estimated useful life of seven (7) years, under
ordinary use conditions. At the end of its useful
life, have the product inspected annually to ensure
all mechanical and safety systems are operating
properly, safely, and are not worn excessively. Failure
to do so may result in accident, injury, or death.
Preparation Before Operating
1. Thoroughly inspect the area where the mower is to
be used. Remove all stones, sticks, wire, bones, toys,
and other foreign objects which could be tripped
over or picked up and thrown by the blade(s).
Thrown objects can cause serious personal injury.
2. To help avoid blade contact or a thrown object
injury, stay in the operator zone behind the mower
handles. Keep helpers at least 75 feet (23 meters)
from the mower while it is in operation. Keep
bystanders, children and pets inside while the
mower is in operation. Stop mower if anyone enters
the area.
3. Be aware of the mower and attachment discharge
direction and do not point the mower discharge at
anyone.
4. Always wear safety glasses or safety goggles during
operation and while performing an adjustment or
repair to protect your eyes. Thrown objects which
ricochet can cause serious injury to the eyes.
5. Wear sturdy, rough-soled work shoes and close-
fitting slacks and shirts. Loose fitting clothes, jewelry
and long hair can be caught in moving parts. Shirts
and pants that cover the arms and legs and steel-
toed shoes are recommended.
6. Never operate mower in bare feet, sandals, slippery
or light-weight (e.g. canvas) shoes.
7. Never over fill fuel tank. Fill tank to no more than 1”
(2.5 cm) below bottom of filler neck to allow space
for fuel expansion.
8. Replace gasoline cap and tighten securely.
9. Use only accessories and attachments approved
for this mower by the mower manufacturer. Read,
understand and follow all instructions provided with
the approved accessory or attachment.
Operating
1. Data indicates that operators, age 65 years and
above, are involved in a large percentage of mower-
related injuries. These operators should evaluate
their ability to operate the mower safely enough to
protect themselves and others from serious injury.
2. Many injuries occur as a result of the mower being
pulled over the foot during a fall caused by slipping
or tripping. Do not hold on to the mower if you are
losing your balance or footing; immediately release
the handle.
3. Never pull the mower back toward you while you
are walking. If you must back the mower away from
a wall or obstruction first look down and behind to
avoid tripping and then follow these steps:
a. Step back from mower to fully extend your arms.
b. Be sure you are well balanced with sure footing.
WARNING: This symbol points out
important safety instructions which, if not
followed, could endanger the personal safety
and/or property of yourself and others. Read
and follow all instructions in this manual
before attempting to operate this machine.
Failure to comply with these instructions may
result in personal injury. When you see this
symbol. HEED ITS WARNING!
DANGER: This machine was built to be
operated according to the safe operation
practices in this manual. As with any type of
power equipment, carelessness or error on
the part of the operator can result in serious
injury. This machine is capable of amputating
hands and feet and throwing objects. Failure
to observe the following safety instructions
could result in serious injury or death.
SAFE OPERATION PRACTICES

5
c. Pull the mower back slowly, no more than half
way toward you.
d. Repeat these steps as needed.
4. Do not engage the drive control (if equipped) while
starting engine.
5. The blade control is a safety device. Never attempt
to bypass its operation. Doing so makes the safety
device inoperative and may result in personal injury
through contact with the rotating blade. The blade
control must operate freely in both directions and
automatically return to the disengaged (off) position
when released. The cutting blade continues to
rotate for up to three seconds after the blade control
is released. Never place any part of the body in
the blade area until you are certain the blade has
stopped rotating.
6. If the mower should start to vibrate abnormally, stop
the engine and check immediately for the cause.
Vibration is generally a warning of trouble.
7. Never operate mower without the proper trail shield,
discharge cover, grass catcher, blade control or other
safety protective devices in place and working.
Never operate mower with damaged safety devices.
Failure to do so can result in personal injury.
8. When starting engine, pull cord slowly until
resistance is felt, then pull rapidly. Rapid retraction of
starter cord (kickback) will pull hand and arm toward
engine faster than you can let go. Broken bones,
fractures, bruises or sprains could result.
9. Do not put hands or feet near rotating parts or
under the cutting deck. Contact with the blade(s)
can amputate hands and feet.
10. Watch for holes, ruts, bumps, rocks, or other hidden
objects. Uneven terrain or hidden objects could
cause a slip and/or trip accident. Tall grass can
hide obstacles.
11. Your mower is designed to cut normal residential
grass of a height no more than 7”(17.5 cm). Do not
attempt to mow through unusually tall, dry grass
(e.g., pasture) or piles of dry leaves.
12. Plan your mowing pattern to avoid discharge of
material toward roads, sidewalks, helpers and the
like. Avoid discharging material against a wall or
obstruction which may cause discharged material to
ricochet back toward the operator.
13. Shut the engine off and wait until the blade comes
to a complete stop before removing the grass
catcher or unclogging the chute. The cutting blade
continues to rotate for up to three seconds after the
blade control is released. Never place any part of
the body in the blade area until you are certain the
engine is off and the blade has stopped rotating.
14. A missing or damaged discharge door, chute or
mulch plug can cause blade contact or thrown
object injuries.
15. Do not operate the mower without the discharge
door, chute, mulch plug or the entire grass catcher
in its proper place.
16. Stop the mower blade when crossing gravel drives,
walks, or roads and while not cutting grass.
17. Mow only in daylight or good artificial light.
18. Do not operate the mower while under the
influence of alcohol or drugs.
19. The muffler and engine become very hot and can
cause serious burn injuries. Do not touch. Allow
the mower to cool for at least five minutes before
storing or attempting any service.
20. Never run an engine indoors or in a poorly ventilated
area. Engine exhaust contains carbon monoxide, an
odorless and deadly gas.
Children
1. Tragic accidents can occur if the operator is not
alert to the presence of children. Children are often
attracted to the mower and the mowing activity.
They do not understand the dangers. Never assume
that children will remain where you last saw them.
2. Keep bystanders, children and pets inside while
the mower is in operation under watchful care of
a responsible adult other than the operator. Stop
mower if anyone enters the area.
3. Be alert and turn mower off if a child or bystander
enters the area.
4. Never allow children under 14 years of age to
operate this mower. Children 14 and over should
read and understand the instructions and safe
operation practices in this manual and on the
mower and should be trained and supervised by
an adult.
5. This mower is a precision piece of power equipment,
not a plaything.Therefore, exercise extreme caution
at all times.This mower has been designed to
perform one job: to mow grass. Do not use it for any
other purpose.
6. Use extreme care when approaching blind corners,
doorways, shrubs, trees or other objects that may
block your vision of a child who may run into the
path of the mower.
7. Keep children away from hot or running engines.
They can suffer burns from a hot engine or muffler.
8. If your mower is equipped with an Electric Start Push
Key, remove the key when the mower is unattended
to prevent unauthorized operation. Make certain the
key is inaccessible to small children.
SAFE OPERATION PRACTICES, cont'd

6
Slope Operation for Walk-Behind
Mowers
1. Slopes are a major factor related to slip and fall
accidents which can result in severe injury or death.
All slopes require extra caution. If you feel uneasy on
the slope, do not mow it.
2. For your safety, measure any slope before using the
mower on the sloped area. Use a slope measuring
device in addition to the slope gauge included
as part of this manual to measure slopes before
operating this mower on a sloped or hilly area.
Smart phone applications can be also utilized to
measure slopes. If the slope is greater than 15
degrees (25%) as shown on the slope gauge or a
slope measuring device, do not operate this mower
on that area or serious injury could result.
3. Do not mow on slopes greater than 15
degrees (25%).
4. Only mow across slopes, never mow up and
down slopes.
5. The mower may speed up when turning downhill,
always turn uphill. Maintain control of the mower
at all times.
6. Do not mow on wet grass. Unstable footing could
cause slipping.
7. Do not operate the mower under any conditions
where traction or stability is in question. Always
be sure of your footing. A slip and fall can cause
serious personal injury. If you feel you are losing your
balance or footing, release the blade control handle
immediately and the blade will stop rotating within
three (3) seconds.
8. Stay at least 3 feet (1 meter) from drop-offs, ditches,
embankments or the edge of water. You could lose
your balance or footing.
Fire & Fuel
1. To avoid personal injury or property damage use
extreme care in handling gasoline. Gasoline is
extremely flammable and the vapors are
explosive. Serious personal injury can occur
when gasoline is spilled on yourself or your clothes
which can ignite. Wash your skin and change
clothes immediately.
2. Extinguish all cigarettes, cigars, pipes and other
sources of ignition.
3. Only use an approved portable fuel (gasoline)
container. Use only containers certified by EPA,
CARB, and/or OSHA.
4. Never remove gas cap or add fuel while the engine
is hot or running. Allow engine to cool at least five
minutes before refueling.
5. Never fuel the mower indoors.
6. Never store the mower or fuel container inside
where there is an open flame, spark or pilot light
as on a water heater, space heater, furnace, clothes
dryer or other gas appliances.
7. If fuel is spilled, wipe it off the engine and mower.
Clean up oil or fuel spillage and remove any fuel
soaked debris. Move the mower to another area.
Wait at least 5 minutes before starting the engine.
8. To reduce fire hazards, keep mower free of grass,
leaves, or other debris build-up. Follow the
instructions in the Service and Maintenance section
to keep your mower free of debris.
9. Never over fill fuel tank. Fill tank to no more than 1”
(25mm) below bottom of filler neck to allow space
for fuel expansion.
10. Replace gas cap and tighten securely.
11. Allow a mower to cool at least five minutes before
fueling or storing.
12. Never fill containers inside a vehicle or on a truck
or trailer bed with a plastic liner. Always place
containers on the ground away from your vehicle
before filling.
13. When practical, remove gas-powered equipment
from the truck or trailer and refuel it on the ground.
If this is not possible, then refuel such equipment on
a trailer with a portable container, rather than from a
gasoline dispenser nozzle.
14. Keep the nozzle in contact with the rim of the fuel
tank or container opening at all times until fueling is
complete. Do not use a nozzle lock-open device.
Service
1. Keep the mower in good working order. Replace
worn or damaged parts.
2. To avoid serious injury or death, do not modify
engine in any way. Tampering with the governor
setting can lead to a runaway engine and cause it to
operate at unsafe speeds. Never tamper with factory
setting of engine governor. Do not change the
engine governor settings or over-speed the engine.
The governor controls the maximum safe operating
speed of the engine.
3. Mower blades are sharp. Wrap the blade or wear
gloves, and use extra caution when servicing them.
4. Before cleaning, repairing, or inspecting, make
certain the blade and all moving parts have stopped.
Disconnect the spark plug wire and ground against
the engine to prevent unintended starting.
5. Ensure the blade comes to a complete stop within
(3) three seconds after operating the blade control.
If the blade does not stop in less than three seconds,
your mower must be serviced professionally by
an authorized service dealer. Check for proper
operation per the Service and Maintenance section.
SAFE OPERATION PRACTICES, cont'd

7
6. Regularly check the safety interlock system for
proper function, as described later in this manual.
If the safety interlock system does not function
properly, have your mower serviced professionally
by an authorized service dealer.
7. Never tamper with the blade control safety interlock
or other safety devices. Check for proper operation
per the Service and Maintenance section.
8. Check the mower blade and engine mounting
bolt torque in accordance to the Service and
Maintenance section in this manual. Also, visually
inspect blade for damage (e.g., excessive wear,
bent, cracked). Replace the blade with the original
equipment manufacturer’s (O.E.M.) blade only.
9. Use of service parts which do not meet the original
equipment specifications may lead to improper
performance and compromise safety.
10. Keep all nuts, bolts, and screws tight to be sure the
equipment is in safe working condition. Check
all hardware for tightness per the Service and
Maintenance section.
11. After striking a foreign object, stop the engine,
disconnect the spark plug wire(s) and ground
against the engine.Thoroughly inspect the mower
for any damage. Repair the damage before starting
and operating
12. Never attempt to make wheel cutting height
adjustments or repairs to the mower while the
engine is running.
13. Grass catcher components and the discharge
cover are subject to wear and damage which
could expose moving parts or allow objects to be
thrown. For safety protection, frequently check
components and replace immediately with original
equipment manufacturer’s (O.E.M.) parts only.“Use
of parts which do not meet the original equipment
specifications may lead to improper performance
and compromise safety.”
14. Maintain or replace safety and instruction labels,
as necessary.
15. Observe proper disposal laws and regulations for
gas, oil, etc. to protect the environment.
Notice Regarding Emissions
Engines which are certified to comply with
California and federal EPA emission regulations
for SORE (Small Off Road Equipment) are certified
to operate on regular unleaded gasoline, and may
include the following emission control systems:
Engine Modification (EM) and ThreeWay Catalyst
(TWC) if so equipped.
When required, models are equipped with
low permeation fuel lines and fuel tanks for
evaporative emission control. California models
may also include a carbon canister. Please contact
Customer Support for information regarding the
evaporative emission control configuration for
your model.
Spark Arrestor
WARNING: This mower is equipped with an
internal combustion engine and should not
be used on or near any unimproved forest-
covered, brush-covered or grass-covered land
unless the engine’s exhaust system is
equipped with a spark arrestor meeting
applicable local or state laws (if any).
If a spark arrestor is used, it should be maintained
in effective working order by the operator. In the
State of California the above is required by law
(Section 4442 of the California Public Resources
Code). Other states may have similar laws. Federal
laws apply on federal lands.
A spark arrestor for the muffler is available through
your nearest engine authorized service dealer or
contact the service department, P.O. Box 361131
Cleveland, Ohio 44136-0019.
Slope Gauge (Back Cover)
WARNING: Slopes are a major factor related
to slip and fall accidents which can result in
severe injury or death. All slopes require
extra caution. If you feel uneasy on the slope,
do not mow it. Do not mow on slopes greater
than 15 degrees (25%). Only mow across
slopes, never mow up and down slopes.
USE THE SLOPE GAUGE ON THE BACK COVER AS
SHOWN TO DETERMINE IF A SLOPE IS TOO STEEP
FOR SAFE OPERATION!
To check the slope, proceed as follows:
1. Open manual to page and fold along the
dashed line.
2. Locate a vertical object on or behind the slope (e.g.
a pole, building, fence, tree, etc.)
3. Align either side of the slope gauge with the object.
4. Adjust gauge up or down until the left corner
touches the slope.
5. If there is a gap below the gauge, the slope is too
steep for safe operation.
SAFE OPERATION PRACTICES, cont'd

8
This page depicts and describes safety symbols that may appear on this mower. Read, understand, and follow all
instructions on the mower before attempting to assemble and operate.
Symbol Description
OPESymbol.com
WARNING — READ THE OPERATOR’S MANUAL(S) - Read, understand and
follow all the safety rules and instructions in the manual(s) and on the
mower before attempting to operate this mower. Failure to comply with this
information may result in personal injury or death. Keep this manual in a
safe location for future and regular reference.
DANGER — AVOID AMPUTATION INJURY - Do not put hands or feet near
or under the cutting deck. Contact with the blade can amputate hands
and feet.
DANGER — AVOID THROWN OBJECT INJURY - Remove all stones, sticks, wire,
bones, toys, and other foreign objects which could be picked up and thrown
by the blade(s). Stay in the operator zone behind the mower handles. Keep
helpers at least 75 feet (23 meters) from mower during operation. Stop
mower if anyone enters the area.
DANGER — AVOID CHILD BLADE CONTACT/THROWN OBJECT INJURY - To help
avoid blade contact or a thrown object injury, do not mow when children
or others are around. Keep bystanders, children and pets inside while the
mower is in operation. Stop mower if anyone enters the area.
DANGER — AVOID THROWN OBJECT INJURY - Do not operate the mower
without the trail shield, discharge cover or entire grass catcher in its proper
place. Stay in the operator zone behind the mower handles.
DANGER — ROTATING BLADES - To reduce the risk of injury, keep hands and
feet away. Do not operate unless discharge cover or entire grass catcher is in
its proper place. If damaged, replace immediately.
DANGER — AVOID SLIP AND FALL ON SLOPES - Slopes are a major factor
related to slip and fall accidents which can result in severe injury or death.
All slopes require extra caution. If you feel uneasy on the slope, do not mow
it. Do not mow on slopes greater than 15 degrees (25%). Only mow across
slopes, never mow up and down slopes.
DANGER— AVOID EYE INJURY - Always wear safety glasses or safety goggles
during operation and while performing an adjustment or repair to protect
your eyes. Thrown objects which ricochet can cause serious injury to
the eyes.
DANGER— AVOID TRIPPING INJURY- Never pull the mower back toward you
while you are walking. If you must back the mower away from a wall or
obstruction first look down and behind to avoid tripping.
WARNING—GASOLINE IS FLAMMABLE - Allow the engine to cool at least five
minutes before refueling.
WARNING— AVOID BURN INJURY - The muffler and engine become very hot
and can cause serious burn injuries. Do not touch. Allow the mower to cool
for at least five minutes before storing or attempting any service.
WARNING: YOUR RESPONSIBILITY—Restrict the use of this power machine to persons who read,
understand and follow the warnings and instructions in this manual and on the machine- SAVE THESE
INSTRUCTIONS!
SAFE OPERATION PRACTICES, cont'd

9
IMPORTANT: This mower is shipped without gasoline
or oil in the engine. Be certain to service engine with
gasoline and oil as instructed in the Operation section
of the Engine Manual before starting or operating
your mower.
NOTE: Reference to right and left hand side of the Lawn
Mower is observed from the operating position.
Unpacking
Opening Carton
1. Cut each corner of the carton vertically from top to
bottom.
2. Remove all loose parts:
•Grass Catcher (if equipped)
•Engine Oil
3. Remove loose packing material.
Removing Mower From Carton
1. Lift mower from the rear to detach it from
underlying carton material and roll mower out
of carton.
2. Check carton thoroughly for any other loose parts.
3. Remove all packing material from the upper and
lower handle including any packaging securing
the blade control to the upper handle and any
packaging between upper and lower handles.
Mower Assembly
Perform the following procedures to assemble and set
up the mower:
•Handle Assembly
•Recoil Starter Rope Handle Assembly
•Attaching the Grass Catcher (if equipped)
•Attaching Side Discharge Chute or Side Discharge Blower
(if equipped)
NOTE: Refer to the procedures in Adjustments to adjust
the cutting height, handle angle (if equipped) and drive
control (if equipped) as necessary.
Handle Assembly
1. Remove knobs or wing nuts (a) and carriage bolts
(b) from the handle (Figure 1).
Do not loosen or remove hex head screws.
a
b
c
Figure 1
2. Remove theT-bolts (c) from the handle brackets
(Figure 1).
3. While stabilizing mower so it doesn’t move, gently
lift and pivot the upper handle into the operating
position (Figure 2). Make certain the lower handle
is seated securely into the handle brackets. Do not
crimp control cables while lifting the handle up.
Figure 2
ASSEMBLY

10
4. Reattach knobs or wing nuts (a) and carriage bolts
(b) removed in STEP 2 into the handle (Figure 3).
c
a
b
Figure 3
Recoil Starter Rope Handle
Assembly
NOTE: The rope guide is attached to the right side of the
upper handle. Loosen the knob securing the rope guide
(Figure 4).
NOTE: Select units include a slip knot in the recoil starter
rope to reduce slack during shipping. Ensure slip knot is
released before performing this procedure.
1. Hold blade control against upper handle.
2. Slowly pull recoil starter rope handle from engine
and slip starter rope into the rope guide.
3. Tighten rope guide knob.
1
2
3
Figure 4
4. If necessary, tighten any loose cable ties (a)securing
cables to the handle (Figure 5).
IMPORTANT: To reduce wear and allow for proper
operation, make sure to leave some slack in the upper
portion of the cables.
a
Figure 5
Attaching the Grass Catcher (If
Equipped)
1. Perform the following to assemble the grass catcher
(Figure 6).
NOTE: Before assembling the grass catcher, ensure the
grass bag is turned right side out, with the warning
label showing on the outside.
a. Place bag over frame so that its black plastic side
is at the bottom.
b. Slip plastic channels (a) of grass bag over the
frame (b).
a
b
Figure 6
2. Follow steps below to attach grass catcher (Figure 7):
a. Lift rear discharge door (a).
b. Remove the rear mulch plug (b) (if equipped).
c. Place grass catcher into the slots in the handle
brackets (c). Lower the discharge door so that it
rests on the grass catcher.
NOTE: To remove grass catcher, lift rear discharge door
on the mower. Lift grass catcher up and off the slots in
ASSEMBLY, cont'd

11
the handle brackets. Reinstall the rear mulch plug (if
equipped). Release rear discharge door to allow it to
close rear opening of mower.
b
a
c
c
a
Figure 7
Attaching Side Discharge Chute (If
Equipped)
The mower is shipped as a mulcher.To convert to side
discharge, ensure the grass catcher is removed, the
rear mulch plug is installed (if equipped) and the rear
discharge door is closed.
1. Lift the mulch plug (Figure 8).
2. Slide the two hooks of the side discharge chute (a)
under the mulch plug hinge pin. Lower the mulch
plug.
IMPORTANT: Do not remove side mulch plug at any time.
a
1
2
Figure 8
Cutting Height Adjustments
This mower is equipped with one of three types of
cutting height adjustment. Refer to Single Lever, Dual
Lever or RearWheel/Caster Wheels in this section.
Rear Wheel Drive Mowers - The dual lever cutting height
adjustment levers are located above the front and rear
left wheels.
NOTE: On select mowers - The front and rear height
adjustment levers move in the opposite direction to
adjust height.
1. Carefully pull the height adjustment lever outward
towards wheel (mower will tend to fall when lever is
moved outward). Figure 9
2. Move lever to desired position for a change in
cutting height.
3. Release lever towards deck.
IMPORTANT: All wheels must be placed in the same
position. For rough or uneven lawns, move each height
adjustment lever to a higher position.This will prevent
you from cutting the grass too close to the ground.
NOTE: Height adjustment
levers may also be located
on the opposite side.
Lower
Lower
Higher
Higher
1
1
2
2
3
3
Figure 9
ASSEMBLY, cont'd

12
Handle Pitch (If Equipped)
For convenience of operation, you may adjust the pitch
of the handle. Perform one of the following.
1. Remove wing nuts and carriage bolts from handle
(Figure 10).
2. Position the handle in one of the three positions that
is most comfortable. See Figure 10 inset.
3. Secure into position with wing nuts and carriage
bolts removed in STEP 1.
1
2
Figure 10
Drive Control Adjustment
Single Lever and Dual Lever Drive
Controls (If Equipped)
If equipped, there is an adjustment wheel located in the
drive control handle housing that is used to tighten or
loosen the drive belt.You will need to adjust the drive
control if the mower does not propel itself with the drive
control engaged or if the mower’s wheels hesitate with
the drive control engaged. If either of these conditions
occur, rotate adjustment wheel clockwise to tighten
cable or counterclockwise to loosen the cable. See
Figure 11 for location on Single Lever Drive Control and
Figure 12 for Dual Lever Drive Control.
Tighten
Loosen
Figure 11
Tighten
Loosen
Figure 12
ASSEMBLY, cont'd

13
Features
A. BLADE CONTROL
The blade control is attached to the upper handle of
the mower. Depress and squeeze it against the upper
handle to operate the mower. Release the blade control
to stop blade and engine.
WARNING: This blade control is a safety
device. Never attempt to bypass its
operation.
B. DRIVE CONTROL
There are four drive control configurations.
1. Single Lever Drive Control (If Equipped) - The single
lever drive control is located on top of the upper
handle and is used to engage the drive. Squeeze
it against the upper handle to engage the drive;
release it to slow down or stop mower.
2. Dual Lever Drive Controls (If Equipped) - The dual
lever drive controls are located on top of the
upper handle and are used to engage the drive.
Squeeze the right, left, or both right and left
controls against the upper handle to engage
the drive; release it/them to slow down or
stop mower.
C. CUTTING HEIGHT ADJUSTMENT LEVER
The dual lever cutting height adjustment levers are
located above the front and rear wheels.To adjust the
cutting height, refer to Cutting Height Adjustment on
page 11.
D. RECOIL STARTER
The recoil starter is attached to the right upper handle.
Stand behind the mower and pull the recoil starter rope
to start the mower.
E. GRASS CATCHER IF EQUIPPED
The grass catcher, located at the rear of the mower, is
used to collect the grass clippings for disposal. Once the
bag is full, remove it up through the handles and empty
it before any further mowing.
F. MULCH PLUG IF EQUIPPED
The mulch plug is located on the right side of the
mower and is used for mulching purposes (recirculating
the clippings back to the lawn).
E
D
G
H
J
A
F
I
C
B2
B1
Figure 13
CONTROLS & OPERATION

14
G. REAR MULCH PLUG IF EQUIPPED
On select mowers, the mulch plug is a separate
component. If equipped, this mulch plug must be
installed into the rear bagging discharge area when
using the mower as a mulcher (recirculating the
clippings back to the lawn) or side discharge.
H. SIDE DISCHARGE CHUTE IF EQUIPPED
The side discharge chute is used to discharge grass
clippings to the side of the mower instead of collecting
the clippings in the grass catcher or using the mower as
a mulcher.
WARNING: Keep hands and feet away from
the chute area on cutting deck. Refer to
warning label on the unit.
I. TRAIL SHIELD
The trail shield is attached to the rear of the mower and
is there to protect the operator from flying debris. Do
not use the mower unless the shield is fully functional
and in place.
J. DECK WASH IF EQUIPPED
Your mower’s deck may be equipped with a fast attach
deck wash nozzle on its surface as part of its deck wash
system. Use the deck wash to rinse grass clippings from
the deck’s underside.
Gasoline And Oil Fill-up
IMPORTANT: Refer to the separate Engine Operator’s
Manual for additional engine information.
This mower is shipped without gasoline (fuel) or oil in
the engine. Be certain to service engine with gasoline
and oil as instructed before starting or operating your
lawn mower.
1. Add provided oil before starting mower for the first
time as instructed in the separate Engine Operator’s
Manual.
2. Service the engine with gasoline as instructed in the
separate Engine Operator’s Manual.
WARNING: Use extreme care when handling
gasoline. Gasoline is extremely flammable
and the vapors are explosive. Never fuel the
machine indoors or while the engine is hot or
running. Extinguish cigarettes, cigars, pipes
and other sources of ignition.
To Start Engine
WARNING: Be sure no one other than the
operator is standing near the lawn mower
while starting engine or operating mower.
Never run engine indoors or in enclosed,
poorly ventilated areas. Engine exhaust
contains carbon monoxide, an odorless and
deadly gas. Keep hands, feet, hair and loose
clothing away from any moving parts on
engine and lawn mower.
Refer to the Engine Operator’s Manual for instructions
on starting and stopping the engine.
To Stop Engine
Release blade control to stop the engine and blade.
NOTE: If equipped with an electric starter push key,
remove the key when the mower is unattended to
prevent unauthorized operation.
WARNING: Wait for the blade to stop
completely before performing any work on
the mower or to remove the grass catcher.
Check blade stopping time is within 3
seconds. If blade does not stop within 3
seconds contact your Service Center.
Using Your Lawn Mower
WARNING: The operation of any lawn mower
can result in foreign objects being thrown
into the eyes, which can damage your eyes
severely. Always wear safety glasses while
operating the mower, or while performing
any adjustments or repairs.
Be sure lawn is clear of stones, sticks, wire, or other
objects which could damage lawn mower or engine.
Such objects could be thrown by the blade in any
direction and cause serious personal injury to the
operator and helpers.
CONTROLS & OPERATION, cont'd

15
Single Lever Drive Control
(If Equipped)
1. Once the engine is running, squeeze the single
lever drive control against the upper handle to
propel mower.
2. Release the single lever drive control to slow
down or stop mower from propelling.
Dual Lever Drive Controls
(If Equipped)
1. Once the engine is running and while continuing
to hold the blade control down, squeeze either (or
both) drive controls against the upper handle to
propel mower (Figure 14).
Engage the right, the left, or
both the right and left control
levers to propel the mower
Figure 14
2. Release the dual lever drive controls to slow down
or stop mower.
3. Speed Control (if equipped) -To change speed,
move speed control to the desired speed.
NOTE: When selecting a drive speed, use the first
speed until you are comfortable and familiar with the
operation of the mower.
IMPORTANT: If you are shifting speeds while the
mower is stationary it may be difficult to shift into
first speed under certain conditions. This is easily
remedied by briefly engaging the drive lever.
NOTE: Your mower is equipped with an advanced
internal drive system for ease of use and smooth
shifting. When turning or pulling the unit rearward,
you may notice higher than normal resistance in the
rear wheels under certain conditions. This is perfectly
normal and can be remedied by allowing the unit to
roll forward slightly without the drive lever(s) engaged
before pulling backwards.
Using Side Discharge Chute
(If Equipped)
To use the mower without mulching or collecting grass,
remove the grass catcher and ensure the rear mulch
plug (if equipped) is installed. Allow the rear discharge
door to close the rear opening of mower. Refer to
AttachingThe Side Discharge Chute in on page 11.
Using Mower as a Mulcher (If Equipped)
For mulching grass, remove the grass catcher or side
discharge chute from the mower. When you remove
the grass catcher from the mower, ensure the rear
mulch plug (if equipped) is installed and allow the rear
discharge door to close the rear opening of mower.
When you remove the side discharge chute, the
mulching plug will close. For effective mulching, do not
cut wet grass. If the grass has been allowed to grow in
excess of four inches, mulching is not recommended.
Use the grass catcher to collect clippings instead.
Using Mower with Grass Catcher
(If Equipped)
You can use the grass catcher to collect clippings while
you are operating the mower.
1. Attach grass catcher, refer to Attaching the
Grass Catcher on page 10. Grass clippings will
automatically collect in bag. Operate mower until
grass bag is full.
2. Stop engine by releasing the blade control. Make
sure that the engine has come to a complete stop.
3. Lift rear discharge door and pull grass bag up
and away from the mower to remove the bag.
Dispose of the grass clippings and reinstall the bag
when complete.
WARNING: If you strike a foreign object, stop
the engine. Disconnect the spark plug wire,
thoroughly inspect mower for any damage,
and repair damage before restarting and
operating. Extensive vibration of mower
during operation is an indication of damage.
The mower should be promptly inspected
and repaired.
WARNING: Before performing any type of
maintenance/service, disengage all controls
and stop the engine. Wait until all moving
parts have come to a complete stop. Allow
the engine to cool. Disconnect spark plug
wire and ground it against the engine to
prevent unintended starting.
CONTROLS & OPERATION, cont'd

16
General Recommendations
• Always observe safety rules on the mower and in the
manual(s) when performing any maintenance.
• The warranty on this mower does not cover
items that have been subjected to operator
abuse or negligence.To receive full value from
warranty, operator must maintain the mower as
instructed here.
• Changing of engine-governed speed will void
engine warranty.
• Check that all hardware is in place & secure and tight
before each use and before off season storage.
Lubrication
Blade Control
Lubricate pivot points on the blade control at least once
a season and before storage with light oil. This control
must operate freely in both directions (Figure 15).
Wheels
Lubricate all wheel hubs/axles at least once a season
and before storage with light oil (Figure 15).
Figure 15
Engine Maintenance
Annually check the engine mounting bolts torque: Min.
29.2 ft-lbs (39.6 N-m), Max. 41.7 ft-lbs (56.3 N-m).
Refer to the Engine Operator’s Manual packed with your
mower for a detailed description of all engine-related
service specifications and storage.
If engine fails to start, runs erratic, overheats,
skips (hesitates) or idles poorly refer to the Engine
Operator’s Manual.
IMPORTANT: Check engine oil level before each use. Refer
to Engine Operator’s Manual.
Clean Engine
• Before every use, clean grass, chaff or accumulated
debris from engine. Keep linkage, spring, and
controls clean. Keep area around and behind muffler
free of any combustible debris.
• Keeping engine clean allows air movement
around engine.
• Engine parts should be kept clean to reduce the risk
of overheating and ignition of accumulated debris.
CAUTION: Do not use water to clean engine
parts. Water could contaminate fuel system.
Use a brush or dry cloth.
Mower Maintenance
Deck Cleaning
At least once a season and before storage, clean the
underside of the mower deck to prevent build-up of
grass clippings or other debris.
1. Allow the engine to run until it is out of fuel. Do not
attempt to pour fuel from the engine. Disconnect
spark plug wire. Refer to Engine Operator’s Manual.
2. Turn mower on its side keeping the muffler side
down and making sure that the air filter and the
carburetor are facing up. Hold mower firmly.
3. Scrape and clean the underside of the deck with a
suitable tool. Do not spray with water.
IMPORTANT: Do not use a pressure washer or garden
hose to clean your mower.These may cause damage
to bearings, or the engine. The use of water will result
in shortened life and reduce serviceability.
4. Put the mower back on its wheels on the ground.
Blade Care
WARNING: Wait for the blade to stop
completely before performing any work on
the mower or to remove the grass catcher.
Check blade stopping time is within 3 seconds. If blade does
notstopwithin 3 secondscontactyourServiceCenter.
WARNING: When removing the cutting blade
for sharpening or replacement, protect your
hands with a pair of heavy gloves or use a
heavy rag to hold the blade.
Annually check the mower blade mounting bolt torque:
Min. 37.5 ft-lbs (50.8 N-m), Max. 50.0 ft-lbs (67.8 N-m).
Periodically inspect the blade and blade adapter for
bends or cracks, especially if you strike a foreign object
or experience excessive vibration. Replace when
necessary. Follow the steps below for blade service:
1. Allow the engine to run until it is out of fuel. Do not
attempt to pour fuel from the engine.
2. Disconnect spark plug wire. Refer to Engine
Operator’s Manual.
PRODUCT CARE

17
3. Turn mower on its side keeping the muffler side
down and making sure that the air filter and the
carburetor are facing up.
4. Remove bolt (a) and blade bell support (b) which
hold the blade and the blade adapter to the engine
crankshaft
(Figure 16).
5. Remove blade (c) and blade adapter (d) from the
crankshaft
(Figure 16).
6. Remove blade from the blade adapter for testing
balance.
a. Balance the blade on a round shaft screwdriver
to check.
b. Remove metal from the heavy side until it
balances evenly.
NOTE: When sharpening the blade, follow the original
angle of grind. Grind each cutting edge equally to
keep the blade balanced.
WARNING: An unbalanced blade will cause
excessive vibration when rotating at high
speeds. It may cause damage to engine and
blade could break causing personal injury.
7. Lubricate the engine crankshaft and the inner
surface of the blade adapter with light oil (Figure
16 inset).
a. Slide the blade adapter (d) onto the engine
crankshaft.
b. Place the blade on the adapter such that the side
of the blade marked“Grass Side”(or with part
number) faces the ground when the mower is in
the operating position.
c. Make sure that the blade is aligned and seated on
the blade adapter flanges.
8. Place blade bell support (b) on the blade (c). Align
notches on the blade bell support with small holes
in blade.
9. Replace hex bolt (a) and tighten hex bolt to
torque: Min. 37.5 ft-lbs (50.8 N-m), Max. 50.0 ft-lbs
(67.8 N-m).
NOTE: To ensure safe operation of your mower,
periodically check the blade bolt for correct torque.
d
a
c
b
Figure 16
Belt Care
A damaged or worn belt may prevent the mower from
self-propelling. Periodically inspect the belt and pulley
system for damage or wear. If necessary contact an
authorized Service Center to have belt replaced.
NOTE: Several components must be removed in order
to change the mower’s drive belt. See an authorized
Service Center to have belt replaced.
PRODUCT CARE, cont'd

18
Customer Support
For machines needing service or parts replacement
please contact your local DEWALT® Service Center
or the Customer Support Department before
attempting to return the machine.
If you have difficulty assembling this product,
have questions regarding the controls, operation,
or maintenance of this machine, want to order
replacement parts/attachments/accessories, or want to
view an online How-To video; you can seek help from
the experts. Have your full model number and serial
number ready. Choose from the options below:
◊ Web: www.DEWALT.com
◊ Phone: [phone]
Replacement Parts
Part Number Description
634-07619 Wheel (Front - 8” x 2”)
634-07731 Wheel (Rear - 8” x 2”)
634-07634 Wheel (Rear - 11” x 2”)
942-0741A Mulching Blade (Bow Tie
Mount )
742P05643 Mulch Blade (S Mount , Serial numbers starting
with the number 2 only.)
731-07486 Discharge Chute
664-05794 Grass Bag (Bag Only)
954-04282 Belt (RWD)
Accesories Parts
Part Number Description
490-850-0005 Blade Removal Tool
490-850-0018 Spark Plug Wrench
490-850-0008 Oil Siphon
490-850-0016 Side Discharge Blower
490-290-0012 Mower Cover
PRODUCT CARE, cont'd
DeWALT®-- LIMITED
WARRANTY
Three Year Limited Warranty
For warranty terms, go
to www.dewalt.com/support/warranty.
To request a written copy of the warranty terms, contact:
Customer Service at DeWALT Industrial Tool Co., 701 East
Joppa Road, Towson, MD 21286 or call 1 800 4 DeWALT
(1 800 433 9258).
Latin America: This warranty does not apply to products
sold in Latin America. For products sold in Latin America,
see country specific warranty information contained in
the packaging, call the local company or see website for
warranty information.
free warning label replacement: If your warning labels
become illegible or are missing, call 1 800 4 DeWALT (1
800 433 9258) for a free replacement.

19
Inglés (traducido de las instrucciones originales)3
Español 19
© 2023 DEWALT. DEWALT® and GUARANTEED TOUGH® are registered trademarks of the DEWALT
Industrial Tool Co., used under license. All rights reserved. The yellow and black color scheme is a
trademark for DEWALT Power Tools and Accessories.

20
ADVERTENCIA:Lea todas las advertencias de seguridad, instrucciones, ilustraciones y especificaciones
incluidas con esta herramienta eléctrica.
NOTA: Este Manual del Operador corresponde a varios modelos. Las características pueden variar según los modelos.
No todas las características que se incluyen en este manual se aplican a todos los modelos y el modelo que se ilustra
aquí puede diferir del suyo.
If you have any questions or comments about this or any DeWALT tool, call us toll free at: 1-855-971-1123.
Definiciones: Símbolos y Palabras de Alerta de Seguridad
Este manual de instrucciones utiliza los siguientes símbolos y palabras de alerta de seguridad para alertarle de
situaciones peligrosas y del riesgo de lesiones corporales o daños materiales.
PELIGRO: Indica una situación de peligro inminente que, si no se evita, provocará la muerte o
lesiones graves.
ADVERTENCIA: Indica una situación de peligro potencial que, si no se evita, podría provocar la muerte
o lesiones graves.
ATENCIÓN: Indica una situación de peligro potencial que, si no se evita, posiblemente rovocaría
lesiones leves o moderadas.
(Utilizado sin palabras) indica un mensaje de seguridad relacionado.
AVISO: Se refiere a una práctica no relacionada a lesiones corporales que de no evitarse puede resultar
en daños a lapropiedad.