Page 1
Operator's Manual
Snow Thrower Model
521mSquall
®
IMPORTANT: Read safety rules and instructions carefully before operating equipment.
Warning: This unit 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 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. 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
arrester 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.
TROY-BILTLLC.P.O.BOX361131CLEVELAND,OHIO44136-0019
PRINTED IN U.S.A. FORM NO. 769-00309B
(5/25/2004)
Page 2
TABLEOFCONTENTS
Content
Important Safe Operation Practices
Assembling Your Snow Thrower
Know Your Snow Thrower
Operating Your Snow Thrower
Making Adjustments
Page
3
5
6
7
8
Content Page
Maintaining Your Snow Thrower 9
Troubleshooting 11
Illustrated Parts List 12
Warranty Back Cover
FINDINGMODELNUMBER
This Operator's Manual is an important part of your new snow thrower. It will help you assemble, prepare and
maintain the unit for best performance. Please read and understand what it says.
Before you start assembling your new equipment, please locate the model plate on the equipment
and copy the information from it in the space provided below. A sample model plate is also given below.
You can locate the model plate by standing at the operating position and looking down at the rear of the
deck. This information will be necessary to use the manufacturer's web site and/or help from the
Customer Support Department or an authorized service dealer.
Copy the model number here:
Copy the serial number here:
OTRDV_BILT mOV-BILT LLC
www.troybik.com CLEVELAND, ON44136
.. 1-800-520-5520_
P= O= BOX 351131
338-558-7220
CUSTOMERSUPPORT
Pleasedo NOTreh/m the l/nit to theretailer from whereit waspurchased, withoutfirst contactingCustomerSupport.
If you have difficulty assembling this product or have any questions regarding the controls, operation or
maintenance of this unit, you can seek help from the experts. Choose from the options below:
Visit troy-bilt.com for many useful suggestions. Click on Customer Support button and you
will get the four options reproduced here. Click on the appropriate button and help is
immediately available.
Z;_;2SW4_Yy©U _Y_
Iookinf] f_:_rcou/d b<_just
a m<:>useclk'k away!
IH eNl÷.
Ntela_l_l÷ fie_ ecell_ _e4e_ yeals_
To reach a Customer Support Representative, please call (866) 840-6483 or (330) 558-7220.
]ooking lot _cou/d be just
a m_>use crick a_,_y!
The engine manufacturer is responsible for all engine-related issues with regard to
performance, power-rating, specifications, warranty and service. Please refer to the engine
manufacturer's Owner's/Operator's Manual, packed separately with your unit, for more
information.
Page 3
SECTION1: IMPORTANTSAFEOPERATIONPRACTICES
,_ 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.
_ ARNING: Engine Exhaust, some of its constituents, and certain vehicle components contain or emitchemicals known to State of California to cause cancer and birth defects or other reproductive harm.
DANGER: This machine was built to beoperated according to the rules for safe operation in this manual, As with any type
of power equipment, carelessness orerror 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,
Training
1. Read, understand, and follow all instructions on the
machine and in the manual(s) before attempting to 8.
assemble and operate. Keep this manual in a safe place
for future and regular reference and for ordering 9.
replacement parts.
2. Be familiar with all controls and their proper operation.
Know how to stop the machine and disengage them
quickly.
3. Never allow children under 14 years old to operate this
machine. Children 14 years old and over should read and
understand the operation instructions and safety rules in
this manual and should be trained and supervised by a
parent.
4. Never allow adults to operate this machine without
proper instruction.
5. Thrown objects can cause serious personal injury. Plan
your snow throwing pattern to avoid discharge of material
toward roads, bystanders and the like.
6. Keep bystanders, helpers, pets and children at least 75
feet from the machine while it is in operation. Stop
machine if anyone enters the area.
7. Exercise caution to avoid slipping or falling, especially
when operating in reverse.
Preparation
1. Thoroughly inspect the area where the equipment is to
be used. Remove all door mats, newspapers, sleds,
boards, wires and other objects which could be tripped
over or thrown by the auger/impeller, j.
2. Always wear safety glasses or eye shields during
operation and while performing an adjustment or repair to Operation
protect your eyes. Thrown objects which ricochet can
cause serious injury to the eyes. 1.
3. Do not operate without wearing adequate winter outer
garments. Do not wear jewelry, long scarves or other
loose clothing which could become entangled in moving
parts. Wear footwear which will improve footing on
slippery surfaces.
4. Use a grounded three wire extension cord and receptacle
for all units with electric start engines.
5. Adjust collector housing height to clear gravel or crushed
rock surfaces.
6. Disengage the control bail before starting the engine.
7. Never attempt to make any adjustments while engine is
running, except where specifically recommended in the
operator's manual.
Let engine and machine adjust to outdoor temperature
before starting to clear snow.
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.
a. Use only an approved gasoline container.
b. Extinguish all cigarettes, cigars, pipes and other
sources of ignition.
c. Never fuel machine indoors.
d. Never remove gas cap or add fuel while the
engine is hot or running.
e. Allow engine to cool at least two minutes before
refueling.
f. Never over fill fuel tank. Fill tank to no more than
Y2inch below bottom of filler neck to provide space
for fuel expansion.
g. Replace gasoline cap and tighten securely.
h. If gasoline is spilled, wipe it off the engine and
equipment. Move machine to another area. Wait 5
minutes before starting the engine.
i. Never store the machine or fuel container inside
where there is an open flame, spark or pilot light
(e.g. furnace, water heater, space heater, clothes
dryer etc.).
Allow machine to cool at least 5 minutes before
storing.
Do not put hands or feet near rotating parts, in the auger/
impeller housing or chute assembly. Contact with rotating
parts can amputate hands and feet.
2. The auger/impeller control bail is a safety device. Never
bypass its operation. Doing so, makes the machine
unsafe and may cause personal injury.
3. The control bail must operate easily in both directions
and automatically return to the disengaged position when
released.
4. Never operate with a missing or damaged chute
assembly. Keep all safety devices in place and working.
5. Never run an engine indoors or in a poorly ventilated
Page 4
area•Engineexhaustcontainscarbonmonoxide,an
odorlessanddeadlygas.
6. Donotoperatemachinewhileundertheinfluenceof
alcoholordrugs•
7. Mufflerandenginebecomehotandcancauseaburn.Do
nottouch•
8. Exerciseextremecautionwhenoperatingonorcrossing
gravelsurfaces•Stayalertforhiddenhazardsortraffic•
9. Exercisecautionwhenchangingdirectionandwhile
operatingonslopes•
10.Planyoursnowthrowingpatterntoavoiddischarge
towardswindows,walls,carsetc.Toavoidproperty
damageorpersonalinjurycausedbyaricochet•
11.Neverdirectdischargeatchildren,bystandersandpets
orallowanyoneinfrontofthemachine•
12.Donotoverloadmachinecapacitybyattemptingtoclear
snowattoofastofarate.
13.Neveroperatethismachinewithoutgoodvisibilityor
light•Alwaysbesureofyourfootingandkeepafirmhold
onthehandles•Walk,neverrun.
14.Disengagepowertotheauger/impellerwhen
transportingornotinuse.
15.Neveroperatemachineathightransportspeedson
slipperysurfaces•Lookdownandbehindandusecare
wheninreverse•
16.Ifthemachineshouldstarttovibrateabnormally,stopthe
engine,disconnectthesparkplugandgrounditagainst
theengine•Inspectthoroughlyfordamage•Repairany
damagebeforestartingandoperating•
17.Disengagethecontrolbailandstopenginebeforeyou
leavetheoperatingposition(behindthehandles)•Wait
untiltheauger/impellercomestoacompletestopbefore
uncloggingthechuteassembly,makinganyadjustments,
orinspections•
18.Neverputyourhandinthedischargeorcollector
openings•Alwaysuseaclearingtooltounclogthe
dischargeopening•
19.Useonlyattachmentsandaccessoriesapprovedbythe
manufacturer(e.g.wheelweights,tirechains,cabsetc.).
20.Ifsituationsoccurwhicharenotcoveredinthismanual,
usecareandgoodjudgment•Contactyourdealeror
telephone1-866-840-6483forassistanceandthename
ofyournearestservicingdealer•
Maintenance& Storage
1. Never tamper with safety devices• Check their proper
operation regularly•
2. Disengage the control bail and stop engine• Wait until the
auger/impeller come to a complete stop. Disconnect the
spark plug wire and ground against the engine to prevent
unintended starting before cleaning, repairing, or
inspecting•
3. Check bolts, and screws for proper tightness at frequent
intervals to keep the machine in safe working condition•
Also, visually inspect machine for any damage•
4. Do not change the engine governor setting or over-speed
the engine• The governor controls the maximum safe
operating speed of the engine•
5. Snow thrower shave plates and skid shoes are subject to
wear and damage• For your safety protection, frequently
check all components and replace 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
compromtse safety•
6. Check the control bail periodically to verify they engage
and disengage properly and adjust, if necessary. Refer to
the adjustment section inthis operator's manual for
instructions•
7. Maintain or replace safety and instruction labels, as
necessary.
8. Observe proper disposal laws and regulations for gas,
oil, etc. to protect the environment•
9. Prior to storing, run machine a few minutes to clear snow
from machine and prevent freeze up of auger/impeller.
10. Never store the machine or fuel container inside where
there is an open flame, spark or pilot light such as a water
heater, furnace ,clothes dryer etc.
11. Always refer to the operator's manual for proper
instructions on off-season storage•
YourResponsibility:
• 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.
I.NEEPAWAY FROM RDTATUHG AUGER
CONTACTWUTHAUGER CANAMPUTATE
HANDSAND FEET•
2 D_SEHGAGECLUTCHLEVERSSTOPENGIHE,
ANDREMAINBEHINDHANDLESUNTILALL
MOWHGPARTSHAVESTOPPEDBEFORE
HHCLOGGUHGOR SERVUCUHGMACHUNE•
3• TOAVOUDTHROWNOBJECTSUHJHRUES,
NEVERD_RECTDISCNARGEATBYSTANDERS.
USEEXTRACAUTIONWHENOPENAT_NGOH
GRAVELSURFACER
4 REAROPERATOR'S_AHHAL.
Page 5
SECTION2: ASSEMBLINGYOURSNOWTHROWER
NOTE: All references to left or right side of the snow
thrower is from the operating position only.
RaisingUpperHandle
• Loosen the hand knob on each side of the handle.
Remove packing material, if any.
Figure 1
• Raise the upper handle in the direction shown in
Figure 1until it clicks into the operating position.
Make sure not to pinch or crimp the cable.
• Tighten the hand knobs.
• Remove the wing knob, flat washer and carriage
bolt from the lower chute. See Figure 2.
• Pivot the upper chute upward over the lip on the
lower chute so that there is NO gap between the
upper chute and the lower chute. See Figure 2.
• Re-secure with the hardware just remove
IMPORTANT:Do not use the chute handle to lift the
snow throwe r.
Carriage Bolt and Flat Washer
AssemblingtheChuteAssembly
For shipping reasons, the snow thrower has been
packaged with the upper chute pivoted all the way
down. To pivot it upward, proceed as follows:
• Turn the chute until the chute opening is facing
straight ahead.
Wing Knob
Figure 2
Page 6
SECTION3: KNOWYOURSNOWTHROWER
_ ARNING: Be familiar with all the controls on the snow thrower and their proper operation. Know how tostop the machine and disengage them quickly.
Gasoline Cap
er Control Handle
Recoil Starter
Starter Button
Chute Assem__
Auger S_ahavi Pla_tt__
AugerControl Handle
Located on the upper handle, the auger control handle
is used to engage and disengage the auger. The snow
thrower is designed to propel by the rotation of the
auger. Pull the auger control handle back against the
upper handle to engage the auger; release to
disengage.
ChuteAssembly
The angle of the chute assembly controls the distance
that the snow is thrown. Pivot the chute assembly up for
greater distance, down for less distance. Loosen the
hand knob on the side of the chute assembly to adjust.
Tilt the chute to the desired position, and tighten the
knob.
ChokeLever
The location of the choke lever is indicated in Figure 3
inset. You will have to use this lever to start the engine.
Push the lever all the way up to the FULL/ON position,
orall the way down to the OFF position as desired.
Access
_Oil Fill
Lever
Choke
Figure 3
Primer Button
Used to inject fuel directly into the carburetor to insure
fast starts in cold weather. Follow engine manual to
prime engine.
IgnitionKey
Used to start engine. Put key in "ON" position to start
for both electric and recoil start engines. Follow starting
instructions given in the next section.
RecoilStarter
Used to manually start the engine.
Electric Starter
Used to start engine with a 120V power source
Plug for Electric Start
Requires use of a three-prong outdoor extension cord
and a 120V power source
Spark Plug Access
Spark plug located under the access cover.
Page 7
SECTION4: OPERATINGYOURSNOWTHROWER
BeforeStarting
_ ARNING: Read, understand, and follow allinstructions and warnings on the machine and
in this manual before operating.
• The spark plug wire was disconnected for safety.
Attach spark plug wire to spark plug before starting.
GasandOilFill-Up
• Check oil and gasoline level and add if necessary.
Follow related instructions in the separate engine
manual packed with your snow thrower.
_ 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.
ToStartEngine
• Insert ignition key into slot. Turn key to ON position.
• Now follow the instructions below as it pertains to
your unit. See Figure 4 for location of controls.
Electric Starter
_ WARNING: The electric starter must beused with a properly grounded three-prong
receptacle at all times to avoid the possibility of
electric shock. Follow all instructions carefully
prior to operating the electric starter.
Auger control handle
Starter
• The electric starter is equipped with a grounded
three-wire power cord and plug, and is designed to
operate on 120 volt AC household current.
• Determine that your house wiring is a three-wire
grounded system. Ask a licensed electrician if you
are not certain.
• If your home wiring system is not a three-wire
grounded system, do not use this electric starter
under any conditions.
• If your home electrical system is grounded, but
a three-hole receptacle is not available, one should
be installed by a licensed electrician before using
the electric starter.
• If you have a grounded three-prong receptacle,
proceed as follows.
• Move Choke Control to "Full" position.
• Push Primer three (3) times, making sure to cover
vent hole when pushing.Connect power cord to
switch box on dash panel. Plug the other end of
power cord into a three-prong 120-volt, grounded,
AC receptacle.
• Push starter button to crank engine. As you crank
the engine, move choke lever to FULL choke
position.
• When engine starts, release starter button, and
move choke gradually to OFF. If engine falters,
move choke immediately to FULL and then
gradually to OFF.
• When disconnecting the powercord, always unplug
from the three-prong receptacle first, and then from
the snow thrower.
RecoilStarter
• Move choke lever to FULL choke position (cold
engine start).
• Ifengine is warm, place choke in OFF position
instead of FULL.
• Push primer button two or three times for cold
engine start.
• Ifengine is warm, push primer button only once.
NOTE: Always cover vent hole in primer button when
pushing. Additional priming may be necessary for first
start if temperature is below 15 degrees Fahrenheit.
• Grasp starter handle and pull rope out slowly, until
it pulls slightly harder. Let rope rewind slowly.
• Pull starter handle rapidly. Do not allow handle to
snap back. Allow it to rewind slowly while keeping a
firm hold on the starter handle.
• As engine warms up and begins to operate evenly,
rotate choke lever slowly to OFF position. If engine
falters, return to FULL choke, then slowly move to
OFF position.
Figure 4
Page 8
ToStopEngine
• To stop engine, turn ignition key counter-clockwise.
Disconnect the spark plug wire from the spark plug
to prevent accidental starting while equipment is
unattended.
To help prevent possible freeze-up of starter,
proceed as follows:
• Run engine for a few minutes before stopping to
help dry off any moisture on the engine.
• Electric Starter: Connect power cord to switch box
on engine, then to 120 volt AC receptacle. With the
engine running, push starter button and spin the
starter for several seconds. The unusual sound
made by spinning the starter will not harm engine or
starter. Disconnect the power cord from receptacle
first, and then from switch box.
Recoil Starter: With engine running, pull starter
rope with a rapid, continuous full arm stroke three
or four times. Pulling the starter rope will produce a
loud clattering sound, which is not harmful to the
engine or starter.
• Wipe all snow and moisture from the carburetor
cover in the area of the control levers. Also, move
control levers back and forth several times. Leave
throttle control lever in the STOP or OFF position.
Leave choke control in the FULL choke position.
• Remove ignition key and disconnect spark plug
wire to prevent accidental starting.
Operatingthe SnowThrower
The pitch of the chute assembly controls the angle at
which the snow is thrown.
• Loosen the wing knob found on the left side of the
chute assembly and pivot the upper chute upward
or downward to the desired pitch. Retighten the
wing knob before operating the snow thrower.
• Position the chute assembly opening by using the
Chute Handle to throw the snow in the desired
direction. See Figure 5.
Wing
Chute
Chut/eHandle
Figure 5
OperatingTips
• Discharge snow downwind whenever possible.
Slightly overlap each previously cleared path.
• Lifting up on the handle will allow the rubber on the
augers to propel the snow thrower forward. Pushing
downward on the handle will raise the augers off
the ground and stop forward motion.
NOTE: Excessive upward pressure on the handle will
result in premature wear on the rubber auger blades
which would not be covered by warranty.
• Run the engine for a few minutes before stopping to
help dry any moisture on the engine.
• Clean the snow thrower thoroughly after each use.
_ ARNING: Muffler, engine and surroundingareas become hot and can cause a burn. Do
not touch.
SECTION5: MAKINGADJUSTMENTS
_ ARNING: NEVER attempt to make anyadjustments while the engine is running,
except where specified in the operator's
manual.
ShavePlate
• To check the adjustment of the shave plate, place
the unit on a level surface. See Figure 6. The
wheels, shave plate and augers should all contact
level surface. Note that if the shave plate is
adjusted too high, snow may blow under the
housing. If the shave plate wears out excessively,
or the unit does not self-propel, the shave plate
may be too low and needs to be adjusted.
NOTE: On new units or units with a new shave plate
installed, the augers may be slightly off the ground.
\
Augers
Figure 6
Shave Plate
Page 9
To adjust, tip the snow thrower back so that it rests
on the handle. Loosen the four lock nuts and bolts
which secure the shave plate to the housing. See
Figure 7. Move the shave plate to desired position
and retighten the nuts and bolts securely.
If the auger seems to hesitate when rotating while the
engine maintains a constant speed, an adjustment is
necessary. Proceed as follows:
The upper hole in the control handle provides for an
adjustment in cable tension. To adjust, disconnect the
end of control cable from the bottom hole in the control
handle and reinsert it in the upper hole. Test the snow
thrower to see if there is a noticeable difference.
Carburetor
- _. ISo IS. _i
Lock Nut & Carriage Bolt
Figure 7
_ ARNING: If any adjustments need to bemade to the engine while the engine is running
(e.g. carburetor), keep clear of all moving parts.
Be careful of muffler, engine and other
surrounding heated surfaces.
• Refer to the separate engine manual, packed with
your unit, for carburetor adjustment information.
ControlCable
As a result of both the control cable and the drive belt
stretching due to wear, periodic adjustments may be
necessary.
SECTION6: MAINTAININGYOURSNOWTHROWER
Pull up on the idler pulley and slip the belt off the
engine pulley. See Figure 9.
_ ARNING: Before servicing, repairing, orinspecting, disengage the control bail and stop
engine. Wait until all moving parts have come
to a complete stop. Disconnect spark plug wire
and ground it against the engine to prevent
unintended starting.
_lley
ReplacingBelt
• Remove the belt cover by removing five hex
screws. See Figure 8.
\
Belt Cover
Figure 8
Rex
Screw
Hex Screw
Engine
Pulley
Pulley
• Reassemble new belt. Reinstall the belt cover.
Belt
Figure 9
ReplacingShavePlate
The shave plate is attached to the bottom of the auger
housing and is subject to wear. It should be checked
periodically. There are two wearing edges and the
shave plate can be reversed. Refer to Figure 6.
• Remove the four carriage bolts and hex lock nuts
which attach it to the snow thrower housing.
Page 10
• Installnewshaveplate,makingsuretheheadsof
thecarriageboltsareontheinsideofthehousing.
• Adjusttheshaveplateaccordingtoinstructionson
page8.Tightensecurely.
Engine
• Refer to the separate engine manual for all engine
maintenance procedures.
• Check engine and snow thrower frequently for
loose hardware, and tighten as needed.
Lubrication
Lubricate pivot points on the control handle and the
extension spring at the end of the control cable with a
light oil once every season and before storage of the
snow thrower at the end of the season.
SECTION7: OFF-SEASONSTORAGE
_ ARNING: Never store engine with fuel intank indoors or in enclosed, poorly ventilated
areas where fuel fumes may reach an open
flame, spark or pilot light as on a furnace, water
heater, clothes dryer, or other gas appliance.
• Clean snowthrowerthoroughly.
• Lubricate as instructed above with a light oil.
• Follow "Storage" instructions in the Engine Manual.
• Store in a clean, dry area. Block the snow thrower
up so it is not resting on the rubber auger blades.
ReplacingtheAuger'sRubberPaddles
The snow thrower auger's rubber paddles are subject
to wear and should be replaced ifany signs of
excessive wear is present.
IMPORTANT:Do NOT allow the auger's rubber paddles
to wear to the point where portions of the metal auger
itself can come in contact with the pavement. Doing so
can result in serious damage to your snow thrower.
NOTE: Call 1-866-840-6483 for information regarding
the price and availability of Auger Kit 753-04472 or
contact an authorized Troy-bilt Service Dealer in your
area).
To change the rubber paddles, proceed as follows:
• Remove the existing rubber paddles by
unthreading the self-tapping screws which secure
them to the auger.
• Secure the replacement rubber paddles to the
auger using the hardware removed earlier.
NOTE: When storing in a metal storage shed, rustproof
the equipment, especially springs, cables and all
moving parts.When storing any type of power
equipment in a poorly ventilated or metal storage shed,
care should be taken to rustproof the equipment,
especially springs, cables and all moving parts.
10
Page 11
SECTION8: TROUBLESHOOTINGGUIDE
Problem Cause
Engine fails to start
Engine runs erratic 1.
Engine overheats 1.
Loss of power 1.
Excessive vibration 1.
Unit fails to self- 1.
propel
Unit fails to 1.
discharge snow
1. Fuel tank empty, or stale fuel
2. Blocked fuel line
3. Key not in ON position
4. Spark plug wire disconnected
5. Faulty spark plug
6. Engine not primed
7. Engine flooded from excessive priming
Unit running on choke 1.
2.
Fuel line blocked, or stale fuel 2.
3.
Water or dirt in fuel system 3.
4.
Carburetor out of adjustment 4.
Carburetor out of adjustment 1.
Spark plug wire loose 1.
2.
Vent in gas cap plugged 2.
Loose parts or damaged auger 1.
Drive cable out of adjustment 1.
2.
Drive belt loose or damaged 2.
Chute assembly clogged 1.
2.
Foreign object lodged in auger
3.
Control cable not adjusted properly
4.
Drive belt loose or damaged
Remedy
1. Fill tank with clean fresh gasoline.
2. Clean fuel line
3. Insert key and turn to ON position
4. Connect wire to spark plug.
5. Clean spark plug, readjust gap, or
replace.
6. Prime engine four times.
7. Wait at least ten minutes before
starting.
Move choke lever to OFF position.
Clean fuel line and fill tank with fresh,
clean gasoline.
Refer to engine manual for remedy.
Refer to engine manual for remedy.
Refer to engine manual for instruction
Firmly connect spark plug wire.
Clear vent.
Stop engine immediately and
disconnect spark plug wire. Check for
possible damage. Tighten all bolts
and nuts. Repair as needed. If the
problem persists, take unit to an
authorized service dealer.
Adjust control cable following
instructions on page 9 of this manual.
Replace drive belt.
Stop engine immediately and
disconnect spark plug wire. Clean
chute assembly and the auger
housing.
2. Stop engine immediately and
disconnect spark plug wire. Remove
object.
3. Adjust control cable following
instructions on page 9 of this manual.
4. Replace drive belt.
NOTE: For repairs beyond the minor adjustments listed above, contact your nearest authorized service
representative or call 1-866-840-6483 for the Customer Support Center. Refer to the engine manual for more
engine rela ted information.
11
Page 12
SECTION9: PARTSLIST
32
35
8/
28
22
18
42
43
14
11
18
16
_35
38
47
45
12
46
12
26
/
27
24
5O
37
19
13
30
22
l'\o
28
12
t
9
15
9
J
17
13
12
Page 13
Model521
REE
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
PART
NO.
684-04027A
684-04028
710-0134
684-04025
710-3008
710-0653
710-0597
710-0433
710-0896
710-1005
712-04064
712-04063
735-04032
726-0299
731-1033
732-0357A
735-04033
736-0176
736-0326
736-0329
734-04063
741-0600
741-0919
746-04091
748-0234
749-04114
750-04230
784-5174
790-00039
790-00045
790-00062
684-0178
684-04029
710-0895
710-1003
710-1090
710-1882
710-3083
712-0252
749-04106
725-0201
725-2018
736-0225
736-0400
736-0451
7510009636
710-0487
720-0284
710-0157
710-0451
747-04159
DESCRIPTION
Auger Assembly Complete
Auger Housing Assembly
Screw, 1/4-20 x .62
Auger Weldment Assembly, 21"
Truss Machine Screw, 5/16-18 x .75
Self-tapping Screw, 1/4-20 x .375"
Hex Screw, 1/4-20 x 1.00 Gr. 5
Self-tapping Screw, 1/4-20 x .625"
Hex Screw, 1/4-14 x 0.625"
Self-tapping Screw, 1/4-14 x .50"
Hex Flange Lock Nut, 1/4-20
Hex Flange Lock Nut, 5/16-18, Gr. 5
Rubber Spiral
Push Cap, 1/2"
Shave Plate, 19.88
Extension Spring .33 x 1.12
Rubber Paddle
Flat Washer .265 x .938 x .120
Fiat Washer .510 x 1.00 x .125
Lock Washer, 1/4
Wheel, 7 x 1.5 Star Gray
Ball Bearing 17 x 40 x 12
Ball Bearing
Control Cable
Shoulder Spacer .25
Lower Handle
Flange Spacer
Bearing Cup
Idler Bracket w/Brake
Belt Cover
Belt Keeper
Mitten Grip Bracket
Shroud Assembly, Black
Screw, 1/4-15 x .75
Self-tapping Screw, #10-16 x .625"
Hex Flange Screw, 5/16-18x 1.25
Hex Flange Screw 5/16-18 x 1.50 Gr. 5
Hex Screw, 5/16-18 x 1.375
Hex Nut 5/8-32 x .12 Special
Upper Handle, Gull Wing
Ignition Key
Key Switch-Electric Start
Lock Washer Internal .625 x 1.058
Flat Washer .194" x .62" x .063
Saddle Washer .320 x .93
Recoil Handle, Mitten
Carriage Bolt 5/16-18 x 2.0 Gr. 1
Handle Knob Assembly 5/16-18
Hex Screw 5/16-24 x .75 Gr. 5
Carriage Bolt, 5/16-18 x.075 GR 1
Bail, Gull Wing
13
Page 14
Model521
REE
NO.
1
710-04071
2
710-0451
3
712-04063
4
720-0284
5
731-04127
6
731-04353
7
731-04886
8
731-04388
9
731-04426
10
732-04111
11
736-0159
PART
NO.
DESCRIPTION
Carriage Screw, 5/16-18 x 1.0
Carriage Bolt, 5/16-18 x.075 GR 1
Hex Flange Lock Nut, 5/16-18, Gr. 5
Handle Knob Assembly 5/16-18
Lower Chute 5" Dia
Ring-Lower Chute
Chute, Adapter 5" Dia
Handle-Chute 5" Dia
Upper Chute
Chute Adjustment Spring
Flat Washer,.349 ID x .879 OD x .063
14
Page 15
Model521
5 \
18
24
19
7
8
6
REE
NO.
1
2
3
4
5
6
7
8
9
10
12
13
14
15
16
17
18
19
2O
21
22
23
24
25
23
PART
NO.
629-0071
710-0627
710-0409
710-0654A
710-0896
710-1003
7511152847
750-04297
726-0205
726-0470
731-2825
736-0119
736-0149
7512B1476
747-04169
751-0535
751-10049
751-10023
751-0101A
756-0416B
756-0475
790-00047
790-00134
726-0201
13
3
21
21
14
4
22
20
DESCRIPTION
Extension Cord
Hex Screw, 5/16-24 x .75
Hex Screw, 5/16-24 x 1.75
Self Tapping Screw, 3/8-16 x 1.00
Hex Screw, 1/4-20 x .62
Screw, #10-16 x .625
Primer Hose
Spacer, Engine
Clamp, Hose
Cable Tie
Knob, Choke
Washer, Lock 5/16
Bell Washer, .349 x .879 x .063
Primer
Support, Wire Gas Tank
Hose, Fuel Line
Cap, Fuel
Tank, Fuel
V-Belt, 1/2
Pulley Half, .625 ID x 2.25 OD
Pulley, 1/2 V 1/2-20 LH x 6.0
Bracket, Engine
Bracket Support Gas Tank
Speed Nut, .3125
15
Page 16
MANUFACTURER'S LIMITED WARRANTY FOR:
®
m
The limited warranty set forth below is given by Troy-Bilt LLC
with respect to new merchandise purchased and used in the
United States and/or its territories and possessions, and by
MTD Products Limited with respect to new merchandise
purchased and used in Canada and/or its territories and
possessions (either entity respectively, "Troy-Bilff).
"Troy-Bilt" warrants this product (excluding its normal wear
parts as described below) against defects in material and
workmanship for a period of two (2) years commencing on the
date of original purchase and will, at its option, repair or
replace, free of charge, any part found to be defective in
materials or workmanship. This limited warranty shall only
apply if this product has been operated and maintained in
accordance with the Operator's Manual furnished with the
product, and has not been subject to misuse, abuse,
commercial use, neglect, accident, improper maintenance,
alteration, vandalism, theft, fire, water, or damage because of
other peril or natural disaster. Damage resulting from the
installation or use of any part, accessory or attachment not
approved by Troy-Bilt for use with the product(s) covered by
this manual will void your warranty as to any resulting
damage.
Normal wear parts are warranted to be free from defects in
material and workmanship for a period of thirty (30) days from
the date of purchase. Normal wear parts include, but are not
limited to items such as: batteries, belts, blades, blade
adapters, grass bags, rider deck wheels, seats, snow thrower
skid shoes, friction wheels, shave plates, auger spiral rubber
and tires.
HOW TO OBTAIN SERVICE: Warranty service is available,
WITH PROOF OF PURCHASE, through your local authorized
service dealer. To locate the dealer in your area:
In the U.S.A.
Check your Yellow Pages, or contact Troy-Bilt LLC at P.O.
Box 361131, Cleveland, Ohio 44136-0019, or call 1-866-840-
6483 or 1-330-558-7220, or log on to our Web site at
www.troybilt.com.
In Canada
Contact MTD Products Limited, Kitchener, ON N2G 4J1, or
call 1-800-668-1238 or log on to our Web site at
www.mtdcanada.com.
This limited warranty does not provide coverage in the
following cases:
a. The engine or component parts thereof. These items
may carry a separate manufacturer's warranty. Refer
to applicable manufacturer's warranty for terms and
conditions.
b. Log splitter pumps, valves, and cylinders have a
separate one- year warranty.
c. Routine maintenance items such as lubricants, filters,
blade sharpening, tune-ups, brake adjustments, clutch
adjustments, deck adjustments, and normal
m_m
deterioration of the exterior finish due to use or
exposure.
d. Service completed by someone other than an
authorized service dealer.
e. Troy-Bilt does not extend any warranty for products
sold or exported outside of the United States and/or
Canada, and their respective possessions and
territories, except those sold through Troy-Bilt's
authorized channels of export distribution.
f. Replacement parts that are not genuine Troy-Bilt parts.
g. Transportation charges and service calls.
h. If Products are used commercially. (Troy-Biltmay
separately offer Limited Commercial Warranties on
certain select products. Ask your dealer or retailer for
details or contact Troy-Bilt Service for more
information.)
No implied warranty, including any implied warranty of
merchantability of fitness for a particular purpose,
applies after the applicable period of express written
warranty above as to the parts as identified. No other
express warranty, whether written or oral, except as
mentioned above, given by any person or entity,
including a dealer or retailer, with respect to any product,
shall bind Troy-Bilt. During the period of the warranty, the
exclusive remedy is repair or replacement of the product
as set forth above.
The provisions as set forth in this warranty provide the
sole and exclusive remedy arising from the sale. Troy-Bilt
shall not be liable for incidental or consequential loss or
damage including, without limitation, expenses incurred
for substitute or replacement lawn care services or for
rental expenses to temporarily replace a warranted
product.
Some jurisdictions do not allow the exclusion or limitation of
incidental or consequential damages, or limitations on how
long an implied warranty lasts, so the above exclusions or
limitations may not apply to you.
In no event shall recovery of any kind be greater than the
amount of the purchase price of the product sold. Alteration
of safety features of the product shall void this warranty.
You assume the risk and liability for loss, damage, or injury to
you and your property and/or to others and their property
arising out of the misuse or inability to use the product.
This limited warranty shall not extend to anyone other than
the original purchaser or to the person for whom it was
purchased as a gift.
HOW LOCAL LAWS RELATE TO THIS WARRANTY: This
limited warranty gives you specific legal rights, and you may
also have other rights that vary in different jurisdictions.
IMPORTANT: Owner must present Original Proof of
Purchase to obtain warranty coverage.
Troy-Bilt LLC, P.O.BOX361131CLEVELAND,OHIO44136-0019; Phone:1-866-840-6483,1-330-558-7220
MTDCanada Limited- KITCHENER,ON N2G4J1; Phone1-800-668-1238
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