Husqvarna EZ 21 User manual

EZ 17
EZ 21
Operator´s manual
Please read these instructions carefully and make sure
you understand them before using the machine. English

TABLE OF CONTENTS
English-
1
Introduction .................................................... 3
General ..................................................... 3
Driving/Transporting on Public Roads ...... 3
Towing ...................................................... 3
Operating .................................................. 3
Good Service ............................................ 4
Manufacturing Number ............................. 4
Symbols and Decals ...................................... 5
Safety Instructions ......................................... 7
General Operation .................................... 7
Personal Safety Equipment ...................... 9
Slope Operation........................................ 9
Safe Handling of Gasoline ......................11
General Maintenance .............................12
Transport ................................................14
Customer responsibilities ........................15
Controls ........................................................16
Parking Brake .........................................17
Motion Control Levers .............................17
Tracking ..................................................18
Fuel Shut Off Valve .................................18
Seat adjustment bolts .............................18
Refueling .................................................19
Bypass linkage ........................................20
Fuses ......................................................20
Hour Meter ..............................................21
Choke Control .........................................21
Ignition Switch .........................................21
Throttle Control .......................................22
Blade switch ............................................22
Cutting height pedal ................................23
Accessories ............................................23
Operation .......................................................24
Training ...................................................24
Before Starting ........................................25
Starting the Engine .................................25
Running ..................................................30
Operating on hills ....................................31
Mowing Tips ...........................................32
Stopping the Engine ...............................33
Moving by Hand ......................................34
Maintenance ................................................. 35
Schedule ................................................ 35
Battery .................................................... 37
Ignition System ....................................... 38
Safety System ........................................ 39
Engine's Cooling Air Intake .................... 40
Throttle Cable ......................................... 40
Choke Cable .......................................... 40
Air Filter .................................................. 41
Heavy Duty Air Filter .............................. 42
Fuel Filter ............................................... 43
Fuel Pump Air Filter ............................... 43
Tire Pressures ........................................ 43
Parking Brake ......................................... 44
V-belts .................................................... 44
Deck Belt ................................................ 44
IZT Belt ................................................... 46
Blades .................................................... 47
Blade Replacement ................................ 48
Mower Deck ........................................... 49
Cutting Height ........................................ 50
Cleaning and Washing ........................... 51
Caster Wheels ........................................ 51
Hardware ................................................ 52
Parking brake ......................................... 52
Tracking adjustment ............................... 53
Lubrication ................................................... 54
Cables .................................................... 55
Lubrication Schedule .............................. 55
Trouble Shooting ......................................... 61
Storage ......................................................... 64
Service ......................................................... 64
Wiring Diagram ............................................ 65
Technical Data ............................................. 66
Accessories ............................................ 68
Torque Specifications ............................. 68
Service Journal ........................................... 69

WARNINGS
2-
English
WARNING!
Failure to follow cautious operating practices can result in serious injury to
the operator or other persons. The owner must understand these instructions,
and must allow only trained persons who understand these instructions to
operate the mower.
Each person operating the mower must be of sound mind and body and must
not be under the influence of any mind altering substance.

English-
3
INTRODUCTION
Introduction
Congratulations
Thank you for purchasing a Husqvarna ride-on mower. This machine is built for superior efficiency to rapidly
mow primarily large areas. A control panel easily accessible to the operator and a hydrostatic transmission
regulated by steering controls both contribute to the machine’s performance.
This manual is a valuable document. Read the contents carefully before using or servicing the machine. The
following of instructions (use, service, maintenance, etc.) by all who operate this machine is important for
the safety of the operator and others. It can also considerably increase the lifespan of the machine and
increase its resale value.
If you sell your machine, be sure to give the operator’s manual to the new owner.
The final chapter of this operator’s manual provides a Service Journal. Ensure that service and repair work
are documented. A well-kept service journal reduces service costs for the maintenance and affects the
machine’s resale value. Please contact your dealer for more information. Take the operator’s manual along
when the machine is taken to your dealer for service.
General
In this operator’s manual, left and right, backward and forward are used in relation to the machine’s normal
driving direction.
Continuous dedication to improve our products require that specifications and design are subject to change
without notice.
Driving and Transport on Public Roads
Check applicable road traffic regulations before transporting on public roads. If the machine is transported,
you must always use approved fastening equipment and ensure that the machine is well anchored. DO NOT
operate this machine on public roadways.
Towing
Do not tow this machine, it may cause damage to the drive system.
Do not tow any trailers, etc with this mower. They may jackknife or overturn causing damage to the mower
and possibly serious injury to the operator.
Operating
This machine is constructed only for mowing grass on lawns and even ground without obstacles such as
stones, tree stumps, etc. The machine can also be used for other tasks when equipped with special
accessories provided by the manufacturer. Operating instructions for the accessories are provided with
delivery. All other types of uses are incorrect. The manufacturer’s directions concerning operation,
maintenance, and repairs must be carefully followed.
Lawnmowers and all power equipment, can be potentially dangerous if used improperly. Safety requires
good judgement, careful use in accordance with these instructions and common sense.
The machine must only be operated, maintained, and repaired by persons familiar with the machine’s
special characteristics and who are also knowledgeable about the safety instructions. Use only approved
repair parts to maintain this machine.
Accident prevention regulations, other general safety regulations, occupational safety rules, and traffic
regulations must be followed without fail.
Unauthorized modifications to the design of the machine may absolve the manufacturer from liability for any
resulting personal injury or property damage.

4-
English
INTRODUCTION
Good Service
Husqvarna’s products are sold all over the world and only in specialized retail stores with complete service.
This ensures that you as a customer receive only the best support and service. Before the product is
delivered, the machine has, for example, been inspected and adjusted by your retailer, see the certificate
in the Service Journal in this operator’s manual.
When you need spare parts or support in service questions, warranty issues, etc., please consult
the following professional:
Manufacturing Number
The machine’s manufacturing number can be found on the printed plate affixed to the left in the engine
compartment. Stated on the plate, from the top are:
• The machine’s type designation (I.D.).
• The manufacturer's type number (Model).
• The machine’s serial number (Serial no.)
Please have the type designation and serial number available when ordering spare parts.
The engine’s manufacturing number is stamped on one of the valve covers.
The plate states:
• The engine’s model.
• The engine’s type.
• Code
Please have these available when ordering spare parts.
The Hydro Drive IZT gears have a barcode decal affixed to the rear of the gears.
This Operator’s Manual belongs to the
machine with manufacturing number:
Engine Transmission

SYMBOLS AND DECALS
English-
5
Symbols and Decals
These symbols are found on the machine and in the operator’s manual.
Study them carefully so that you know what they mean.
Used in this publication to notify the reader of a risk of personal injury or death , particularly if the reader
does not follow instructions given in the manual.
Used in this publication to notify the reader of a risk of material damage , particularly if the reader does not
follow instructions given in the manual. Used also when there is a potential for misuse or misassembly.
WARNING!
Xxxxxxx xxxx xxxxxxxx xxx x
Xxxxx xxxxxx xx.
xx xxxxxxxx xxxxx xxx xx.
IMPORTANT INFORMATION
Xxxxxxx xxxx xxxxxxxx xxx xxx
xxxx xxxxxx xx.
Parking brake
Do not stand hereBattery acid is corrosive, explosive,
and flammable
CE conformity
marking. Only for
European market
Warning! Rotating
blades, keep away from
the discharge deck
Do not touch rotating
parts
FuelChokeSlowFastNeutralReverse
Warning!
Noise emissions to the surroundings
in accordance with the European
Union’s directive. The machine’s
emission is stated in the chapter
TECHNICAL DATA and on the decals.
Only machines for European
market
Use protective glasses Use protective gloves
RN

SYMBOLS AND DECALS
6-
English
Whole
body
exposure
to thrown
objects.
Severing
of fingers
& toes.
Do not open
or remove
safety
shields while
engine is
running.
Careful
backing up,
watch for
other people.
Careful going
forward,
watch for
other people.
Read
Operator´s
Manual.
Shut off engine
& remove key
before
performing any
maintenance or
repair work.
Keep a safe
distance from
the machine.
Use on
slopes no
greater
than 10˚.
No
passengers

SAFETY INSTRUCTIONS
English-
7
Safety Instructions
These instructions are for your safety. Read them carefully.
IMPORTANT: THIS CUTTING 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.
General Operation
• Read, understand, and follow all
instructions on the machine and in the
manual before starting.
• Do not put hands or feet near rotating
parts or under the machine. Keep clear
of the discharge opening at all times.
• Only allow responsible adults, who are
familiar with the instructions, to operate
the machine.
• Clear the area of objects such as rocks,
toys, wire, etc., that could be picked up
and thrown by the blades.
• Be sure the area is clear of bystanders
and pets before operating. Stop machine
if anyone enters the area.
• Never carry passengers. The machine is
only intended for use by one person.
• Do not mow in reverse unless absolutely
necessary. Always look down and behind
before and while backing.
• Never direct discharged material toward
anyone. Avoid discharging material
against a wall or obstruction. Material
may ricochet back toward the operator.
Stop the blades when crossing gravel
surfaces.
• Do not operate machine without the
entire grass catcher, discharge guard, or
other safety devices in place and working
• Slow down before turning.
• Never leave a running machine
unattended. Always turn off blades, set
parking brake, stop engine, and remove
keys before dismounting.
WARNING!
This symbol means that important safety instructions need to be emphasized. It
concerns your safety.
8011-512
Read the operator’s manual before starting the
machine
8011-513
Clear the area of objects before mowing
8011-520
Never take passengers

SAFETY INSTRUCTIONS
8-
English
• Disengage blades when not mowing.
Shut off engine and wait for all parts to
come to a complete stop before cleaning
the machine, removing the grass catcher,
or unclogging the discharge guard.
• Operate machine only in daylight or good
artificial light.
• Do not operate the machine while under
the influence of alcohol or drugs.
• Watch for traffic when operating near or
crossing roadways.
• Use extra care when loading or
unloading the machine into a trailer or
truck.
• Always wear eye protection when
operating machine.
• Data indicates that operators, age 60
years and above, are involved in a large
percentage of riding mower-related
injuries.These operators should evaluate
their ability to operate the riding mower
safely enough to protect themselves and
others from serious injury.
• Follow the manufacturer’s
recommendation for wheel weights or
counterweights.
• Never allow children or other persons not
trained in the use of the machine to use
or service it. Local laws may regulate the
age of the user. Anyone who operates
this machine should first read and
understand this Operator’s Manual.
• Keep machine free of grass, leaves or
other debris build-up which can touch hot
exhaust / engine part and burn. Do not
allow the mower deck to plow leaves or
other debris which can cause build-up to
occur. Clean any oil or fuel spillage
before operating or storing the machine.
Allow machine to cool before storage.
WARNING!
Engine exhaust and certain
vehicle components contain
or emit chemicals considered
to cause cancer, birth defects,
or other reproductive system
damage. The engine exhaust
contains carbon monoxide,
which is a odorless, colorless,
poisonous gas. Do not use the
machine in enclosed spaces.

SAFETY INSTRUCTIONS
English-
9
Personal Safety Equipment
• Make sure that you have first aid equipment
close at hand when using the machine.
• Never use the machine when barefoot.
Always wear protective shoes or boots,
preferably with steel toecaps.
• Always wear approved protective glasses
or a full visor when assembling or driving.
• Always wear gloves when handling the
blades.
• Never wear loose clothing that can get caught
in moving parts.
• Use ear protectors to avoid damage to
hearing.
Slope Operation
Slopes are a major factor related to loss of
control and tip-over accidents, which can
result in severe injury or death. Operation on
all slopes requires extra caution. If you cannot
back up the slope or if you feel uneasy on it,
do not mow it.
• Mow up and down slopes (10 degrees
maximum), not across.
• Watch for holes, ruts, bumps, rocks, or
other hidden objects. Uneven terrain
could overturn the machine. Tall grass
can hide obstacles.
• Choose a low ground speed so that you
will not have to stop while on the slope.
• Do not mow on wet grass. Tires may lose
traction.
• Avoid starting, stopping, or turning on a
slope. If the tires lose traction, disengage
the blades and proceed slowly straight
down the slope.
• Keep all movement on the slopes slow
and gradual. Do not make sudden
changes in speed or direction, which
could cause the machine to roll over.
WARNING!
When using the machine, approved personal protective equipment (shown in
illustrations) shall be used. Personal protective equipment cannot eliminate
the risk of injury but it will reduce the degree of injury if an accident does
happen. Ask your retailer for help in choosing the right equipment.
8011-670
Personal protective equipment
6003-004
Mow up and down, not side-to-side
WARNING!
Do not drive up or down hills
with slopes greater than 10
degrees. And do not drive
across any slopes.

SAFETY INSTRUCTIONS
10-
English
• Use extra care while operating machine
with grass catchers or other
attachments; they can affect the stability
of the machine. Do not use on steep
slopes.
• Do not try to stabilize the machine by
putting your foot on the ground.
• Do not mow near drop-offs, ditches, or
embankments. The machine could
suddenly roll over if a wheel is over the
edge or if the edge caves in.
• Do not make any sudden changes in
speed or direction
• Take special care if attachments are
fitted that can change the stability of the
machine.
Children
Tragic accidents can occur if the operator is
not alert to the presence of children. Children
are often attracted to the machine and the
mowing activity. Never assume that children
will remain where you last saw them.
• Keep children out of the mowing area
and in the watchful care of a responsible
adult other than the operator.
• Be alert and turn machine off if a child
enters the area.
• Before and while backing, look behind
and down for children.
• Never carry children, even with the
blades shut off. They may fall off and be
seriously injured or interfere with safe
machine operation. Children who have
been given rides in the past may
suddenly appear in the mowing area for
another ride and be run over or backed
over by the machine.
• Never allow children to operate the
machine.
• Use extra care when approaching blind
corners, shrubs, trees, or other objects
that may block your view of a child.
8011-517
Never allow children to operate the machine
8011-518
Keep children away from the work area
8011-519
Be extra cautious when driving on slopes

SAFETY INSTRUCTIONS
English-
11
Maintenance
Safe Handling of Gasoline
To avoid personal injury or property damage,
use extreme care in handling gasoline.
Gasoline is extremely flammable and the
vapors are explosive.
• Extinguish all cigarettes, cigars, pipes, and
other sources of ignition.
• Use only approved gasoline container.
• Never remove gas cap or add fuel with the
engine running. Allow engine to cool at least
two (2) minutes before refueling.
• Never fuel the machine indoors.
• Never store the machine or fuel container
where there is an open flame, spark, or pilot
light such as on a water heater or other
appliances.
• Never fill containers inside a vehicle or on a
truck or trailer bed with plastic liner. Always
place containers on the ground away from your
vehicle when filling.
• Remove gas-powered equipment from the truck
or tailer and refuel it on the ground. If this is not
possible, then refuel such equipment with a
portable container, rather than from a gasoline
dispenser nozzle.
• 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.
• If fuel is spilled on clothing, change clothing
immediately.
• Never overfill fuel tank. Replace gas cap and
tighten securely.
• Do not start the engine near spilled fuel.
• Never use gasoline as a cleaning agent.
• If leaks arise in the fuel system, the engine
must not be started until the problem has been
resolved.
• Check the fuel level before each use and leave
space for the fuel to expand, because the heat
from the engine and the sun may otherwise
cause the fuel to expand and overflow.
WARNING!
The engine must not be started when the driver’s floor plate or any protective plate
for the mower deck’s drive belt is removed.
8011-516
Never fill the fuel tank indoors
WARNING!
The engine and the exhaust
system, become very hot during
operation.
Risk for burns if touched.
Allow engine and exhaust
system to cool at least two (2)
minutes before refueling

SAFETY INSTRUCTIONS
12-
English
General Maintenance
• Never operate machine in a closed area.
• Keep all nuts and bolts tight to be sure
the equipment is in safe working
condition.
• Never tamper with safety devices. Check
their proper operation regularly.
• Keep machine free of grass, leaves, or
other debris build-up. Clean oil or fuel
spillage and remove any fuel-soaked
debris. Allow machine to cool before
storing.
• If you strike a foreign object, stop and
inspect the machine. Repair, if
necessary, before restarting.
• Never make any adjustments or repairs
with the engine running. Prevent starting
by removing the spark plug wire before
making adjustments or carrying out
maintenance.
• Check grass catcher components and
the discharge guard frequently and
replace with manufacturer’s
recommended parts, when necessary.
• Mower blades are sharp. Wrap the blade
or wear gloves, and use extra caution
when servicing them.
• Check brake operation frequently. Adjust
and service as required.
• Maintain or replace safety and instruction
labels, as necessary.
• Do not modify safety equipment. Check
regularly to be sure it works properly.The
machine must not be driven with
defective or unmounted protective plates,
protective cowlings, safety switches, or
other protective devices.
• Do not change the settings of governors
and avoid running the engine with overly
high engine speeds. If you run the
engine too fast, you risk damaging the
machine components.
• Be very careful when handling battery
acid. Acid on skin can cause serious
corrosive burns. If you spill battery acid
on your skin, rinse immediately with
water.
WARNING!
The battery contains lead and
lead compounds, chemicals that
are considered to cause cancer,
birth defects, and other
reproductive system damage.
Wash your hands after handling
the battery.
Always use protective glasses
when handling the battery.
8011-515
Never drive the machine in an enclosed space

SAFETY INSTRUCTIONS
English-
13
• Acid in the eyes can cause blindness,
contact a doctor immediately.
• Be careful when servicing the battery.
Explosive gases form in the battery. Never
perform maintenance on the battery when
smoking or near open flames or sparks.
The battery can explode and cause serious
injury/damage.
• Ensure that nuts and bolts, especially the
fastening bolts for the blade attachments,
are properly tightened, torqued and that
the equipment is in good condition.
• Sparking can occur when working with
the battery and the heavy cables of the
starter circuit. This can cause battery
explosion, fire or eye injury. Sparking in
this circuit can not occur after the chassis
cable (normally negative, black) is
removed from the battery.
• Use protective goggles.
• Ensure that the fuel filler cap is mounted
tightly and no flammable substances is
stored in an open vessel.
• Never work with the starter circuit if there
is spilled fuel.
• Disconnect the chassis cable from the
battery first and reconnect it last.
• Do not make a bridge short circuit across
the starter relay to run the starter.
• Never use the machine indoors or in
spaces lacking proper ventilation. The
exhaust fumes contain carbon monoxide,
an odorless, poisonous, and lethal gas.
• Stop and inspect the equipment if you
run over or into anything. If necessary,
make repairs before starting.
• Never make adjustments with the engine
running.
• The machine is tested and approved only
with the equipment originally provided or
recommended by the manufacturer. Only
use approved repair parts for the
machine.
6003-009
Do not smoke when performing maintenance on the
battery. The battery can explode and cause serious
injury/damage
8009-728
Risk of sparking
WARNING!
Avoid electrical sparking and its
consequences by the following
routines:

SAFETY INSTRUCTIONS
14-
English
• The blades are sharp and can cause
cuts and gashes. Wrap the blades or use
protective gloves when handling them.
• Check the parking brake’s functionality
regularly. Adjust and service as
necessary.
• The mulch blades should only be used in
familiar areas when higher quality
mowing is desired.
• Reduce the risk of fire after using the
machine by removing grass, leaves, and
other debris that may have accumulated
on the machine. Allow the machine to
cool before putting it in storage.
• Clean deck and underside of deck after
each use and, avoid spraying engine and
electrical components with water.
Transport
• The machine is heavy and can cause
serious crushing injuries. Be extra
cautious when it is loaded on or unloaded
from a vehicle or trailer.
• Use an approved trailer to transport the
machine. Activate the parking brake, turn
off the fuel supply, and fasten the machine
with approved fastening devices, such as
bands, chains, or straps, when
transporting.
• Do not operate this machine on public
roadways.
• Check and abide by local traffic
regulations before transporting the
machine on any road.
• Do not tow this machine, it may cause
damage to the drive system.
• Do not tow any trailers, etc. with this
mower. They may jackknife or overturn
causing damage to the mower and
possibly serious injury to the operator.
• Load the unit onto truck or trailer by
driving up ramps of suitable strength using
a slow speed. Do not lift! The machine is
not intended to be lifted by hand.
8011-644
Clean the machine regularly
IMPORTANT INFORMATION
The parking brake is not sufficient to lock
the machine in place during transport.
Ensure that the machine is well fastened
to the transport vehicle. Always reverse
the machine onto the transport vehicle to
avoid tipping it over.

SAFETY INSTRUCTIONS
English-
15
Customer responsibilities
• Read and observe the safety rules.
• Follow a regular schedule in maintaining,
caring for and using your mower.
• Follow the instructions under
"Maintenance” and "Storage” sections of
this owner’s manual.
• This machine has no brain. Use yours!
A spark arrester for the muffler is available through your authorized Husqvarna dealer.
WARNING!
This mower is equipped with an internal combustion engine and should not be
used on or near any unimproved forest-covered, bush-covered or grass-covered
land unless the engine’s exhaust system is equipped with a spark arrester
meeting applicable local or state laws (if any). If a spark arrester is used, it should
be maintained in effective working order by the operator.

CONTROLS
16-
English
Controls
This operator’s manual describes the
Husqvarna Zero Turn Rider. The rider is fitted
with a Kawasaki engine.
Transmission from the engine is made via two
belt-driven hydraulic transaxles, one for each
drive wheel. Using the left and right steering
controls, the flow is regulated and thereby the
direction and speed.
Page Page
1. Parking brake 17 8. Hour meter 21
2. Motion control levers 16 9. Choke control 21
3. Fuel shut off valve 18 10. Ignition switch 21
4. Seat adjustment bolts 18 11. Throttle control 22
5. Fuel tank cap 19 12. Blade switch 22
6. By pass linkage 19 13. Cutting height pedal 23
7. Fuses 20
Zero Turn Rider
8011-769-2
Locations of the controls

CONTROLS
English-
17
1. Parking Brake
The parking brake is found on the left of the
machine. Pull the lever backward to activate
the brake and forward to release it.
2. Motion Control Levers
The machine’s speed and direction are
continuously variable using the two steering
controls. The steering controls can be moved
forward or backward about a neutral position.
Furthermore, there is a neutral position,
which is locked if the steering controls are
moved outward.
When both controls are in the neutral position
(N), the machine stands still.
By moving both controls an equal amount
forward or backward, the machine moves in a
straight line forward or backward respectively.
In order, for example, to turn right while
moving forward, move the right control
towards the neutral position. The rotation of
the right wheel is reduced and the machine
turns to the right.
Zero turn can be achieved by moving one
control backward (behind the neutral position)
and carefully moving the other steering
control forward from its neutral position. The
rotation direction when zero turning is
determined by which steering control is
moved backward behind the neutral position.
If the left steering control is pulled backward,
the machine turns to the left. Use extra care
when using this maneuver.
If the steering controls are in uneven
positions when standing still or do not fit in
the slots for moving the controls outward,
they can be adjusted.
IMPORTANT INFORMATION
The machine must be standing still when
applying the parking brake.
8011-711
Parking brake not activated
8011-789
Steering controls
WARNING!
The machine can turn very
rapidly if one steering control
is moved much further forward
than the other.

CONTROLS
18-
English
Tracking
If the mower is not tracking straight, check the
air pressure in both rear tires. Recommended
air pressure is 15 psi. (1 bar) Tracking must
be checked on a flat and level concrete or
blacktop surface. If the unit still does not track
straight contact your Husqvarna workshop for
adjustments.
3. Fuel Shut Off Valve
The fuel shut off valve is located under the
fuel tank. The valve has two positions;
ON and OFF.
4. Seat adjustment bolts
With the machine off remove the two bolts
holding the seat pan down and flip the seat
forward.
The seat can be adjusted lengthways. When
making adjustments, loosen the four bolts
under the seat pan, after which the seat can
be moved backward or forward.
Once the seat is adjusted to your liking. Flip
the seat back down and rebolt the seat pan to
the frame.
8011-712
Fuel shut off valve in OFF position
CZ-1
Lengthways adjustment
1
23
4
Fuel shut off valve in OFF position
8011-791
1. Forward
2. Neutral
3. Neutral slot, Neutral lock
4. Reverse