Husqvarna WG4815E, WG3613E User manual

English
Operator's Manual
WG4815E/968999120
WG3613E/968999117
WG3613BF/968999365
WG3613EC/968999756
Please read the operator’s manual carefully and make sure
you understand the instructions before using the machine.

©2008 HTC. All rights reserved.
Beatrice, NE. Printed in U.S.A.

CONTENTS
INTRODUCTION...............................................................5
Congratulations...........................................................5
General.......................................................................5
Driving and Transport on Public Roads......................5
Operating....................................................................5
Good Service..............................................................6
SYMBOLS AND DECALS.................................................7
SAFETY............................................................................9
General Operation......................................................9
Personal Safety Equipment...................................... 11
Slope Operation........................................................ 11
Safe Handling of Gasoline........................................13
General Maintenance ...............................................14
Transport ..................................................................15
CONTROLS....................................................................16
Control Locations......................................................16
Recoil Starter Grip....................................................17
Ignition Switch...........................................................17
Motion control levers.................................................17
Operator Presence Levers........................................18
Gear shift lever .........................................................18
Throttle Control and Choke Control..........................18
Neutral Bail...............................................................19
Parking Brake.................................................19
Blade Engagement Lever.........................................19
Refueling...................................................................19
Fuel Shut-off Valve ...................................................19
Accessories ..............................................................20
Fuel Tank..................................................................20
Before Starting..........................................................21
Starting the Engine...................................................22
OPERATION...................................................................23
Gearbox....................................................................25
Running ....................................................................25
Reverse ....................................................................26
Operating on hills......................................................26
Mowing Tips .............................................................27
Stopping....................................................................28
Emergency stop..............................................28
Normal operating stop ....................................28
Stopping the Engine .......................................28
Manual Transport......................................................29
Cutting Height Adjustment........................................30
Cutting Height Table .................................................31
MAINTENANCE..............................................................32
Maintenance Schedule.............................................32
Ignition System.........................................................34
Safety System...........................................................35
Function Check...............................................35
Engine Cooling Air Intake .........................................36
Throttle and Choke Cable.........................................36
Air Filter Maintenance...............................................37
Replacing the Fuel Filter...........................................38
Tire Pressures ..........................................................38
Parking Brake...........................................................39
V-belts.......................................................................39
Deck belt.........................................................39
Cutting Blades ..........................................................40
Blade replacement..........................................40
Brake Rod Adjustment..............................................41
Caster Wheels..........................................................41
Cleaning....................................................................41
Hardware..................................................................41
LUBRICATION................................................................42
Lubricating the Cables..............................................43
Front Wheel Mount.........................................43
Front Wheel Bearings.....................................43
Throttle and Choke Cable, Lever Bearings.....43
Engine Oil.................................................................44
Engine Oil Filter..............................................44
Changing the Engine Oil.................................44
Engine Oil Levels............................................45
Drive Wheel Idle Arm......................................46
Coupling..........................................................46
Mower Deck Lever..........................................46
Rear Wheel.....................................................47
Brake Arms.....................................................47
TROUBLESHOOTING....................................................48
STORAGE.......................................................................50
Winter Storage..........................................................50
Service......................................................................50
SCHEMATICS.................................................................51
TECHNICAL DATA..........................................................52
Torque Specications................................................53
Accessories ..............................................................54
Torque Specications................................................54
CONFORMITY CERTIFICATES .....................................55
SERVICE JOURNAL.......................................................56

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 inuence of any mind altering substance.
WARNING!
Engine exhaust, some of its constituents, and certain vehicle components contain or emit
chemicals known to the State of California to cause cancer and birth defects or other
reproductive harm.

INTRODUCTION
Husqvarna-5
Congratulations
Thank you for purchasing a Husqvarna Walk-Behind
mower. This machine is built for superior efficiency
to rapidly mow primarily large areas. A control panel
easily accessible to the operator and a 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. Following the instructions (use, service,
maintenance, etc.) is important for the safety of the
operator and others. It can also considerably increase
the life span 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. 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.
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.
Lawn mowers 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.

INTRODUCTION
6 - Husqvarna
Good Service
Husqvarna’s products are sold through out 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 certicate 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 afxed 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 a barcode decal. The decal is placed on the left side of the
crankcase.
The plate states:
The engine’s serial number (E/NO).
•
The engine’s type designation (Code)•
Please have these available when ordering spare parts.
This Operator’s Manual belongs to the machine with
the manufacturing number: Engine Transmission

SYMBOLS AND DECALS
Husqvarna-7
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 should
neglect to follow instructions given in the manual.
Used in this publication to notify the reader of a risk of material damage, particularly if the reader should neglect
to follow instructions given in the manual. Used also when there is a potential for misuse or misassembly.
WARNING!
Xxxx xxxxxx xxxxx xxxx xxxxxxxxx xxxxxx
xxxxxxxxx. xx xxxxxxxx xxxx xxxxxx.
IMPORTANT INFORMATION
Xxxx xxxxxx xxxxx xxxx xxxxxxxxx xxxxxx
xxxxxxxxx. xx xxxxxxxx xxxx xxxxxx.
Fast Slow Choke Fuel Warning! CE conformity
marking. Only for
European market
Battery acid is corrosive, explosive and ammable Warning! Rotating blades, Do not touch
keep away from the rotating parts
discharge deck
Use protective glasses Use protective gloves

SYMBOLS AND DECALS
8 - Husqvarna
Read Shut off engine and Keep a safe Use on slopes No passengers
Operator’s remove key before distance from no greater
Manual performing any the machine than 10°
maintenance or repair work
Whole body Severing of ngers Do not open or Careful backing up, Careful going
exposure to and toes remove safety watch for other forward, watch for
thrown objects shields while people other people
engine is running
Moving sharp blades under cover

SAFETY
Husqvarna-9
8011-630
Read the operator’s manual before starting the machine
8011-631
Clear the area of objects before mowing
WARNING!
This symbol means that important
safety instructions need to be
emphasized. It concerns your
safety.
WARNING!
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.
These instructions are for your safety. Read them
carefully.
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.
Clear the area of objects such as rocks, toys,• wire, etc., which could be picked up and
thrown by the blades.
Be sure the area is clear of bystanders• before operating. Stop machine if anyone
enters the area.
Always look down and behind during reverse• maneuvers. Look for both large and small
obstacles.
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.•
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 chute.
Operate machine only in daylight or good•
articial light.

SAFETY
10 - Husqvarna
8011-632
Never take passengers
Do not operate the machine while under the•
inuence of alcohol or drugs.
Watch for trafc when operating near or • crossing roadways.
Only allow responsible adults, who are• familiar with the instructions, to operate the
machine.
Never take passengers. The machine is only• intended for use by one person
Use extra care when loading or unloading• the machine into a trailer or truck.
Always wear eye protection when operating• machine.
Anyone who operates this machine must rst • read and understand this Operation Manual.
Local laws may regulate the age of the user.
Keep machine free of grass, leaves or other• debris buildup which can touch hot exhaust
or engine parts and burn. Do not allow the
mower deck to plow leaves or other debris
which can cause buildup 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
Husqvarna-11
8011-670a
Personal protective equipment
8011-634
Mow up and down, not side to side
WARNING!
Do not drive up or down hills with
slopes greater than 10 degrees.
Do not drive across any slopes.
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.
Personal Safety Equipment
Make sure that you have rst aid equipment • close at hand when using the machine.
Never use the machine when barefoot.• Always wear protective shoes or boots,
preferably with steel toe caps.
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 or
machine tip-over accidents, which can result in severe
injury or death. Operation on all slopes requires extra
caution. If you cannot reverse up the slope or if you
feel unsure, 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.

SAFETY
12 - Husqvarna
8011-635
Be extra cautious when driving on slopes
8011-636
Never allow children to operate the machine
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.
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 small children.
Never carry children, even with the blades• shut off. They may fall off and be seriously
injured or interfere with safe machine
operation.
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.
8011-633
Keep children away from the work area

SAFETY
Husqvarna-13
8011-637
Never ll the fuel tank indoors
Safe Handling of Gasoline
To avoid personal injury or property damage, use
extreme care in handling gasoline. Gasoline is
extremely ammable 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 ame, spark, or pilot
light such as on a water heater or other
appliance.
Before you begin refueling, minimize the• risk of static electricity by touching a metal
surface.
Never ll containers inside a vehicle or on a • truck or trailer bed with plastic liner. Always
place containers on the ground away from
the vehicle when lling.
Remove gas-powered equipment from the• truck or trailer and refuel it on the ground. If
this is not possible, 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 overll 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 fuel system, engine must not• be started until problem has been resolved.
Check the fuel level before each use and• leave space for the fuel to expand, as the
heat from the engine and the sun may
otherwise cause the fuel to expand and
overow.
WARNING!
The engine must not be started when the driver’s oor plate or any protective plate
for the mower deck’s drive belt is removed.
WARNING!
The engine and the exhaust
system become very hot during
operation.
There is risk for burns if touched.
Allow engine and exhaust system
to cool at least two (2) minutes
before refueling.
8011-777
Do not smoke when using the machine

SAFETY
14 - Husqvarna
8011-638
Never drive the machine in an enclosed space
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 buildup. 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.
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.
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.
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.
WARNING!
Use protective glasses for
maintenance work.

SAFETY
Husqvarna-15
Use protective goggles.•
Ensure that the fuel ller cap is mounted •
tightly and no ammable substances are
stored in an open vessel.
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.
The blades are sharp and can cause• cuts and gashes. Wrap the blades or use
protective gloves when handling them.
The mulch blades should only be used in• familiar areas when higher quality mowing is
desired.
Reduce the risk of re by removing grass, • leaves, and other debris that may have
accumulated on the machine. Allow the
machine to cool before putting it in storage.
Regularly clean deck and underside of• deck, 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.
Check and abide by local trafc regulations • before transporting the machine on any road.
Do not tow this machine, it may cause• damage to the drive system.
8011-639
Clean the machine regularly

CONTROLS
16 - Husqvarna
This operator’s manual describes the Husqvarna Walk-
Behind Mower. The machine is tted with a Kawasaki
four-stroke overhead valve engine.
Control Locations
Recoil Starter Grip1. Ignition Switch2. Motion Control Levers3. Operator Presence Levers4. Gear Shift Lever5.
42
1
5
6
Throttle/Choke Control6. Neutral Bail7. Blade Engagement Lever8. Fuel Shut Off Valve9. Fuel Cap/Tank10.
Transmission from the engine is made via two V-belts,
one for each wheel. Using the left and right steering
controls, the speed of the rear wheels is regulated for
steering the machine.
3
789 10

CONTROLS
Husqvarna-17
8011-476
Recoil starter grip
Recoil Starter Grip
WARNING!
The machine can turn very rapidly
if one steering control is moved
much further forward than the
other.
IMPORTANT INFORMATION
Do not let recoil cord snap back by
itself. This may damage the cord or the
recoil starter assembly.
Pull the recoil starter grip slowly until you feel
compression, then pull it briskly.
Normally this engine will not backre. If you get
backres, contact your Husqvarna dealer for service.
Ignition Switch
The ignition key switch is placed on the control panel.
8011-475
Ignition key
8011-478
Motion control levers
Motion control levers
The machine’s speed and direction are continuously
variable using the two motion control levers.
When both controls are in the neutral position, the
machine stands still. The controls can be locked in
neutral position by the Neutral bail
By moving both controls an equal amount the machine
moves in a straight line forward.
In order, for example, to turn right while moving
forward, move the right control towards the handle
(neutral position). The rotation of the right wheel is
reduced and the machine turns to the right.
To stop forward travel pull levers back.

CONTROLS
18 - Husqvarna
8011-482
Gear shift lever in the neutral position
8061-682
Choke control/throttle control lever
Operator Presence Levers
Located on the handle, the Operator Presence
System levers serve as an additional safety feature.
An electrical interlock safety system is activated
by depressing either one or both of the Operator
Presence Levers at the handle grips.
Releasing both Operators Presence Levers while
mowing or transporting will break the electrical circuit
and cause the engine and mower to stop. The mower
will not stop immediately after releasing the OP levers
and some travel occurs.
When the blades are engaged or neutral lock bail has
not locked the drive levers, one or both levers must be
pressed against the handle for the engine to remain
running. 8011-478
Motion control levers
Gear shift lever
Gear shift lever has 5 gear speeds. There are also
neutral and reverse gears.
Grip the motion control levers before shifting gears.
This will clutch the gearbox.
Throttle Control and Choke Control
Choke Control
The choke control is used for cold starts to provide the
engine with a richer fuel mixture.
The choke control is combined with the throttle control.
To engage the choke, the throttle control is moved past
the max RPM setting to the choke position.
Do not use the choke when starting a warm engine.
Throttle Control
The throttle control regulates the engine speed and
thereby the rate of rotation of the blades, assuming the
control for engaging the mower deck is pulled forward.
In order to increase or decrease the engine speed, the
control is moved forward or backward respectively.
Avoid idling the engine for long periods, as there is a
risk of the spark plugs fouling.
For best mower performance, USE FULL THROTTLE
WHEN MOWING.

CONTROLS
Husqvarna-19
Neutral Bail
The neutral bail keeps the unit from moving while
idling. The bail will lock the drive levers in neutral
position and must be activated when starting the
engine.
Parking Brake
The parking brake on gear drive machines is applied
when neutral bail is in lock position.
8011-477
Neutral bail
8011-682
Blade engagement lever
8011-437
Fuel shut off valve - closed (OFF)
Blade Engagement Lever
The blade engagement lever is on the left support by
the control panel.
In order to engage the blades, push the lever forward.
The blades are disengaged when the lever is pulled
backward.
The blade engagement lever needs to be adjusted so
the lever does not come in contact with control panel
when the lever is in the off position.
Refueling
Fuel Shut-off Valve
The fuel shut off valve is placed on the fuel line below
the fuel tank. The valve has two positions; ON and
OFF. The illustration shows the valve in the closed
(OFF) position.

CONTROLS
20 - Husqvarna
WARNING!
Fill to bottom of ller neck. Do not
overll. Wipe off any spilled oil
or fuel. Do not store, spill or use
gasoline near an open ame.
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
WARNING!
Gasoline is highly ammable.
Observe caution and ll the
tank outdoors (see the safety
instruction).
IMPORTANT INFORMATION
Experience indicates that alcohol
blended fuels (called gasohol, ethanol
or methanol) can attract moisture which
leads to separation and formation of
acids during storage. Acidic gas can
damage the fuel system of an engine
while in storage. To avoid engine
problems, the fuel system should be
emptied before storage of 30 days or
longer. Drain the gas tank, start the
engine and let it run until the fuel lines
and carburetor are empty. Use fresh
fuel the next season. See Storage
Instructions for additional information.
Never use engine or carburetor
cleaners in the fuel tank or permanent
damage may occur.
Fuel Tank
The machine has one fuel tank. The tank volume is 5.3
gallons / 20 liters.
The engine should run on a minimum of 87-octane
unleaded gasoline (no oil mix). Also see Technical
Data concerning methanol and ethanol fuels.
When operating in temperatures below 32° F. (0° C.),
use fresh, clean winter grade gasoline to help insure
good cold weather starting.
8011-418
Fuel tank
Accessories
For mulching, there is a BioClip attachment available.
This is mounted underneath the mower deck and
consists of control plates and BioClip blades.