MTD E663G User manual

IMPORTANT: Read safety rules and instructions carefully before operating equipment.
Model
E663G
PRINTED IN U.S.A.
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 ofCalifornia the above isrequired by law (Section 4442 of the California Public Resources Code). Other states mayhave
similar laws. Federal laws apply on federal lands. A spark arrester for the muffler is availablethrough your nearest engine authorized
service dealer or contact the service department, P.O. Box 368022 Cleveland, Ohio 44136-9722.
Operator’s Manual
FORM NO.
770-10049A.fm
(6/99)
MTD PRODUCTS INC. P.O. BOX 368022 CLEVELAND, OHIO 44136-9722

2
TABLE OF CONTENTS
Content Page
Important Safe Operation Practices...................................................................3
Loose Parts........................................................................................................5
Assembling Your Snow Thrower........................................................................5
Know Your Snow Thrower .................................................................................7
Operating Your Snow Thrower...........................................................................8
Making Adjustments ..........................................................................................10
Maintaining Your Snow Thrower........................................................................12
Service...............................................................................................................13
Off-season Storage............................................................................................15
Troubleshooting.................................................................................................16
Parts List............................................................................................................17
FINDING MODEL NUMBER
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. The information on
the model plate is very important if you need help from our Customer Support Department or
an authorized dealer.
• You can locate the model number by looking at the lower frame cover in the rear of your snow
thrower. A sample model plate is explained below. For future reference, please copy the model
number and the serial number of the equipment in the space below.
CALLING CUSTOMER SUPPORT
If you have difficulty assembling this product or have any questions regarding the controls, operation or
maintenance of this unit, please call the Customer Support Department.
Call 1- (330) 220-4MTD (4683) or 1- (800)-800-7310 to reach a Customer Support
representative. Please have your unit’s model number and serial number ready when you
call. See previous section to locate this information. You will be asked to enter the serial
number in order to process your call.
Copy the model number here:
Copy the serial number here:
(Model Number) (Serial Number)
MTD PRODUCTS INC
CLEVELAND, OHIO 44136

3
SECTION 1: IMPORTANT SAFE OPERATION PRACTICES
This Warning 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 your snow thrower. Failure to comply with these instructions may result in
personal injury. When you see this symbol, heed its warning.
DANGER:Your snow thrower was built to be operated according to the rules for safe operation in this
manual. As with any type of power equipment, carelessness or error on the part of the operator can
result in serious injury. Failure to observe the following safety instructions could result in serious injury
or death.
TRAINING
• Read this operators manual carefully in its entirety
before attempting to assemble or operate this
machine. Be completely familiar with the controls
and the proper use of this machine before operating
it. Keep this manual in a safe place for future and
regular reference and for ordering replacement
parts.
• Never allow children under 14 years oldto operate
a snow thrower. Children 14 years old andover
should only operate snow thrower under close
parental supervision. Only persons well acquainted
with these rules of safe operation should be allowed
to use your snow thrower.
• No one should operate this unit while intoxicated or
while taking medication that impairs the senses or
reactions.
• Keep the area of operation clear of allpersons,
especially small children and pets.
• Exercise caution to avoid slipping or falling,
especially when operating in reverse.
PREPARATION
• Thoroughlyinspecttheareawheretheequipment is
to be used and remove all door mats, sleds, boards,
wires and other foreign objects.
• Disengage all clutches and shift into neutral before
starting engine.
• Do not operate equipment without wearing
adequate winter outer garments. Donot wear
jewelry, long scarfs or other loose clothing which
could become entangled inmoving parts. Wear
footwear which will improve footing on slippery
surfaces.
• Before working with gasoline, extinguish all
cigarettes and other sourcesof ignition. Check the
fuel before starting the engine. Gasoline is an
extremely flammable fuel.Do not fill the gasoline
tank indoors, while the engine is running, or until
engine has been allowed to cool at least two
minutes. Replace gasoline cap securelyand wipe
off any spilled gasoline beforestarting the engineas
it may cause a fire or explosion.
• Use a grounded three wire plug-in for all units with
electric drive motors or electric starting motors.
• Adjust collector housing height to clear gravel or
crushed rock surface.
• Never attempt to make any adjustments while
engine is running (except where specifically
recommended by manufacturer).
• Let engine and machine adjust to outdoor
temperature before starting to clear snow.
• Always wear safety glasses or eye shields during
operation or while performing an adjustment or
repair, to protect eyes from foreign objects that may
be thrown from the machine in anydirection.
OPERATION
• Do not put hands or feet near or under rotating
parts. Keep clear ofdischarge opening and auger at
all times.
• Exercise extreme caution when operating on or
crossing gravel drives, walks, or roads. Stay alert
for hidden hazards or traffic. Do not carry
passengers.
• After striking a foreign object,stop the engine,
remove wire from spark plug,and thoroughly
inspect the snow thrower for any damage. Repair
the damage before restartingand operating the
snow thrower.
• If the snow thrower should start to vibrate
abnormally, stop the engine and check immediately
for the cause. Vibration is generally a warning of
trouble.
• Stop engine whenever you leave the operating
position, before unclogging the collector/impeller
housing or discharge guide, and making any
repairs, adjustments, orinspections. Never place
your hand in the discharge or collector openings.
Use a stick orwooden broom handle to unclog the
discharge opening.
• Take all possible precautions when leaving the unit
unattended. Disengage the collector/impeller, shift
into neutral, stop the engine, and remove the key.

4
• When cleaning, repairing, or inspecting, make
certain the auger, impeller and all moving parts
have stopped. Disconnect spark plug wire and keep
away from plug to prevent accidental starting.
• Do not run engine indoors, except when starting
engine and transporting snow thrower in or out of
building. Open doors. Exhaust fumes are
dangerous.
• Do not clear snow across the face of slopes.
Exercise extreme cautionwhen changing direction
on slopes. Do not attempt to clear steep slopes.
• Never operate snow thrower without guards, plates,
or other safety protection devices in place.
• Never operate snow thrower near glass enclosure,
automobiles, window wells, drop off, etc., without
proper adjustments of snow thrower discharge
angle. Keep children and pets away.
• Do not overload machine capacity by attempting to
clear snow at too fast a rate.
• Neveroperatethemachineat high transport speeds
on slippery surfaces. Look behind anduse care
when backing.
• Never direct discharge at bystanders or allow
anyone in front of unit.
• Disengage power to collector/impeller when
transporting or not in use.
• Use only attachments and accessories approvedby
the manufacturer of snow thrower (such as tire
chains, cabs, etc.).
• Never operate the snow thrower without good
visibility or light. Alwaysbe sure of your footing and
keep a firm hold on the handles.Walk, never run.
• Muffler and engine become hot and can cause a
burn. Do not touch.
MAINTENANCE AND STORAGE
• Check shear bolts, engine mounting bolts, etc., at
frequent intervals for proper tightness to be sure
equipment is in safe working condition.
• Never store the machine with fuelin the fuel tank
insideabuildingwhereignitionsourcesarepresent,
such as hot water andspace heaters, clothes
dryers, and the like. Allow engine tocool before
storing in any enclosure.
• Always refer to operators manual instructions for
important details if snow thrower is to be stored for
an extended period.
• Run machine a few minutes after throwing snow to
prevent freeze upof collector/impeller. Checkclutch
controls periodically to verify they engage and
disengage properly and readjustif necessary. Refer
to operators manual for adjustment instructions.
Your Responsibility
Restrict the use of this power machine to persons who read, understand and follow the warnings and
instructions in this manual and on the machine. Some of the safety labels on the equipment are
reproduced below. Take a moment to study these labels before operating the unit. Always maintain
safety while operating or servicing the equipment.
SHUT OFF ENGINE
BEFORE
UNCLOGGING
DISCHARGE CHUTE.
STOP ENGINE BEFORE REMOVING
DEBRIS AND SERVICING UNIT.
KEEP CLEAR OF IMPELLER WHILE
ENGINE IS RUNNING.
NEVER DIRECT DISCHARGE AT
BYSTANDERS OR WINDOWS OR
ALLOW ANYONE IN FRONT OF
UNIT.
THOROUGHLY INSPECT THE AREA
WHERE THE EQUIPMENT IS TO BE
USED AND REMOVE ALL DOOR
MATS, SLEDS, BOARDS, WIRES AND
OTHER FOREIGN OBJECTS.
REFER TO OWNERS MANUAL FOR
FULL INSTRUCTIONS.
1.
2.
3.
4.
5.
AVOID INJURY FROM
ROTATING AUGER -
KEEP HANDS, FEET
AND CLOTHING AWAY.
WARNING
DANGER

5
SECTION 2: LOOSE PARTS
The snow thrower is shipped with following loose parts in the carton. Please remove all loose parts from the carton
before discarding it. See Figure 1 to identify the parts noting that these parts may be referred to again in the
following sections of this manual. Part numbers are shown in parentheses.
Figure 1
SECTION 3: ASSEMBLING YOUR SNOW THROWER
NOTE: Any reference in this manual to the left or right
side of the snow thrower is observed from the
operator’s position.
IMPORTANT: Make any final adjustments as instructed
later on in this section BEFORE operating your snow
thrower. Failure to follow the instructions may cause
damage to the snow thrower.
• Remove screws from the top sides and ends of the
shipping crate.
• Set panel aside to avoid tire punctures or personal
injury.
• Remove and discard plastic bag that covers unit.
• Roll unit out of crate.
• Remove the lower two plastic wing knobs, cupped
washers and carriage bolt (eyebolt on the left side)
from the lower handle. See Figure 2.
Figure 2
• Raise the upper handle assembly until it locks over
the lower handle. See Figure 2 and Figure 3.
• Look at the lower rear of snow throwerframe to be
sure both cables are aligned with cable roller
guides.
• Secure the upper handle and lower handle with the
two plastic wing knobs, cupped washers and
carriage bolt (eyebolt on the left side) previously
removed. See Figure 3.
Figure 3
• Adjust the eyebolt on the chute directional control
so the rod does not come into contact with the
engine by moving the hex nut against the handle (if
necessary). Retighten the wing nut to secure the
directional control in this position.
• Slide the connector down over the end of the lower
shift rod. See Figure 3. Tap the connector until it
locks on the lower shift rod.
Shear Bolts
(710-0890A)
HexLockNuts
(712-0429)
Wing Knobs,
Washers
and Bolts
Eyebolt
Eyebolt Wing Knobs
Connector
Hex Nut
AUGER SHEAR BOLTS
The augers are secured to the auger shaft with two shear bolts and
hex lock nuts. If you hit a foreign object or ice jam, the snow thrower
is designed so that the bolts may shear. Two replacement shear
bolts and nuts are provided for your convenience. Store in a safe
place until needed.
IMPORTANT: NEVER replace the auger shear bolts with standard
hex bolts. Any damage to the auger gearbox or other components
as a result of doing so will NOT be covered by your snow thrower’s
warranty.

6
NOTE: If the connector is not properly assembled, the
shift rod will pivot and you will not be able to change
speeds or change directions.
• Unwrap the headlight wire which is attached to the
headlight, beneath the handle panel. Wind the
headlight wire around the right handle until excess
slack is removed.
• Plug the wire from the headlight into the wire lead
coming from the right side of the engine, beneath
the fuel tank.
Final Adjustments
Auger Control Adjustment
Check the adjustment of the auger control as follows:
• Push forward on the auger control (Refer to Figure
6) until the small rubber bumper contacts the upper
handle. There should be slack in the cable.
• Release the auger control. The cable should be
straight. Make certain you can depress the auger
control against the left handle completely.
If adjustment is necessary, proceed as follows:
• Loosen the jam nut and thread the cable in (for less
slack) or out (for more slack) as necessary. See
Figure 4.
Figure 4
• Recheck the adjustment before retightening the
jam nut against the cable.
Skid Shoe Adjustment
The space between the shave plate and the ground can
be adjusted by repositioning the skid shoes found on
either side of the snow thrower’s auger housing. For
close snow removal, place skid shoes in the low
position.
Usemiddleorhighpositionwhenareatobeclearedis
uneven. See Figure 5.
Figure 5
IMPORTANT: It is NOT recommended that this snow
thrower be operated on a gravel surface, as loose
stones can be easily picked up and thrown by the
machine. If you must operate on a gravel surface,
ALWAYS adjust the skid shoes into the HIGH position
to allow the shave plate maximum clearance.
Adjust skid shoes as follows:
• Loosen, but do NOT remove, the two hex nuts
which fasten the skid shoe to the auger housing.
• Raise or lower the skid shoe to desired position.
NOTE:
Make certain the entire base of both skid shoes
are against the ground to avoid uneven wear on the
skid shoes.
• Retighten the hex nuts loosened earlier.
• Repeat this adjustment on the skid shoe found on
the opposite side of the snow thrower.
Tire Pressure Adjustment
The tires are over-inflated for shipping purposes.
Adjust the tire pressure to between 15 psi and 20 psi.
NOTE:
If the tire pressure is not equal in both tires, the
unit may pull to one side or the other.
Traction Controland Shift Lever Adjustment
To check the adjustmentof thetraction control and shift
lever, proceed as follows:
• Move the shift lever into sixth (6) position.
a. Withthetractioncontrol(refertoFigure6in
Section 4 of this manual) released, gently
push the snow thrower forward, then pull it
back. Disregarding the overall weight of the
snow thrower, the machine should otherwise
move freely.
“Z” End
Auger Control Cable
Jam Nut
Skid Hex Nuts
Shoes

7
b. Engage the traction control, and attempt to
move them machine both forward and
rearward. You should experience resistance
as the wheels should not be turning.
• Move the shift lever into the fast reverse (R2)
position and repeat the previous steps (a & b).
If you experienced resistance either when repositioning
theshiftleverfrom6toR2orwhenattemptingtomove
the machine forward or rearward with the traction
control released, yoursnow thrower’s traction control is
in need of adjustment and you should NOT operate the
machine before completing the adjustment as follows:
• Loosen the jam nut on the traction control cable
and UNTHREAD the cable one full turn.
• Recheck the adjustment.
• Retighten the jam nut to secure the cable when
correct adjustment is reached.
If the machine can be moved freely both forward and
rearward when the traction control fully depressed,
proceed as follows:
• Loosenthejamnutonthetractiondrivecableand
THREAD the cable in one full turn.
• Recheck the adjustment and repeat adjustment as
necessary.
• Retighten the jam nut to secure the cable when
correct adjustment is reached.
NOTE:
If you are uncertain that you have reached the
correct adjustment, refer to Traction Control
Adjustment in Section 6 of this manual.
SECTION 4: KNOW YOUR SNOW THROWER
Figure 6
Traction Control / Auger Control Lock
The traction control is located on the right handle.
Squeeze the traction control to engage the wheel drive.
Release to stop. This same lever also locks the auger
control so you can turn the chute directional control
without interrupting the snow throwing process. If the
auger control is engaged along with the traction control,
the operator can release the auger control (on the left
handle) and the augers will remain engaged. Release
the traction control to stop both the augers and wheel
drive (auger control must also be released).
IMPORTANT: Always release tractional control before
changing speeds.
Headlight
The headlight is on whenever the engine is running.
Shift Lever
The shift lever is located in the center of
thehandlepanelandisusedto
determine both ground speed and
direction of travel. It can be moved into
any of eight positions.
Forward
Your snow thrower has six forward (F)
speeds. Position number one (1) is the
slowest. Position number six (6) is the
fastest.
Reverse
Your snow thrower has two reverse (R)
speeds. R1 is the slower, while R2 is the
faster of the two.
IMPORTANT: Always release tractional control before
changing speeds.
Auger Control
The auger drive clutch is located on the left handle.
Squeeze the clutch grip to engage the augers. Release
to stop the snow throwing action. (Traction control must
also be released.)
Chute Directional Control
The chute directional control is located on left side of
the snow thrower.
To change the direction in which snow is thrown, turn
chute directional control as follows:
• Crank clockwise to discharge to the left.
• Crankcounterclockwise to discharge to the right.
Auger
Control
Shift
Lever
Traction Control /
Auger Control Lock
Chute Directional
Control

8
FuelShut-offValve
The fuel shut-off valve, located
under fuel tank, controls fuel flow
from the tank.Alwaysmake certain
it is in the Open (vertical) position
before attempting to start the engine.
Throttle Control
The throttle control is located on the engine. It regulates
the speed of the engine.
Safety Ignition Key
The safety ignition key must be fully inserted in the
switch before the unit will start. Remove the ignition key
when snow thrower is not in use.
IMPORTANT: Do NOT attempt to turn the key.
Figure 7
SECTION 5: OPERATING YOUR SNOW THROWER
Gas And Oil Fill-up
IMPORTANT: Although your snow thrower comes
shipped with oil already in the engine, you MUST check
the engine oil level as instructed in the separate engine
manual packed with your unit BEFORE starting the
engine for the first time. Read instructions carefully
Service the engine with gasoline and oil as
instructed in the separate engine manual packed with
your snow thrower. Read instructions carefully.
WARNING: Never fill fuel tank indoors,
with engine running or while engine is
hot. Do not smoke when filling fuel tank.
Electric Starter
WARNING: The electric starter is
equipped with a three-wire power cord
and plug, and is designed to operate on
120 volt AC household current. It must be properly
grounded at all times to avoid the possibility of
electric shock which may be injurious to the
operator. Follow all instructions carefully.
Determine that your house wiring is a three-wire
grounded system. Ask a licensed electrician if you
are not certain. If your house wiring system is not a
three-wire grounded system, do not use this
electric starter under any conditions. If your system
is grounded and a three-hole receptacle is not
available at the point your starter will normally be
used, one should be installed by a licensed
electrician.
• When connecting the power cord, always connect
cordtostarteronenginefirst,thenplugtheother
end into a three-hole grounded receptacle.
• When disconnecting the cord, always unplug the
end from the three-hole grounded receptacle first.
To Start Engine
IMPORTANT: If unit shows any sign of motion (traction
or augers) with the controls disengaged, shut engine off
immediately. Readjust as instructed under the heading
Final Adjustments in Section 3 of this manual.
• Attachsparkplugwiretosparkplug.
• Make certain the fuel shut-off valve is in the open
(vertical) position.
• Make certain that both the auger control and the
traction control are in the disengaged (released)
position.
• Move throttle control up to FAST position. Insert
ignitionkeyintoslot.SeeFigure7.Becertainit
snaps into place. Do not turn the key.
• Rotate choke knob to FULL choke position (cold
engine start). If engine is warm, place choke in OFF
position instead of FULL.
•Electric Start Only: Connect power cord to switch
box on engine. Plug the other end of power cord
into a three-hole, grounded 120 volt AC receptacle.
•Recoil Start Only: Push primer button two or three
times when using recoil starter. If engine is warm,
push primer button once only. See Figure 7.
NOTE:
Always cover vent hole in primer button when
pushing. Additional priming may be necessary for first
start if temperature is below 15
o
F.
Open
Closed
Primer
Rope
Starter
Handle
Choke
Ignition Key Throttle
Control

9
•Electric Start: Do NOT prime engine. Push starter
button on top of the engine to crank the engine.
When engine starts, release starter button.
•Recoil Start: Grasp starter handle (see Figure 7)
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 knob slowly to OFF position. If engine
falters, return to FULL choke, then slowly move to
OFF position.
To Stop Engine
• Run engine for a few minutes before stopping to
help dry off any moisture on the engine.
• To help prevent possible freeze-up of starter,
proceed as follows:
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 recepta-
cle first, and then from switch box.
Recoil Starter (Optional Instructions): With
engine running, pull starter rope with a rapid, con-
tinuous 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.
• To stop engine, remove the ignition key. Do not turn
key. Disconnect the spark plug wire from the spark
plug to prevent accidental starting while equipment
is unattended.
NOTE:
Do not lose ignition key. Keep it in a safe place.
Engine will not start without the ignition key.
• 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.
To Engage Drive
• With the engine running near top speed, move shift
lever into one of the six FORWARD positions or two
REVERSE positions. Select a speed appropriate
for the snow conditions that exist.
NOTE:
Use the slower speeds until you are familiar
with the operation of the snow thrower.
• Squeeze the traction control against the right
handle and the snow thrower will move. Release it
and the drive motion will stop.
IMPORTANT: NEVER move shift lever without first
releasing the traction control. Doing so will cause
premature wear to drive system’s friction wheel rubber.
To Engage Augers
To engage the augers and start the snow throwing
action, squeeze the auger control against the left
handle.
To disengage power to the augers, release both the
auger control and the traction control, if engaged,
NOTE:
The auger control can also be locked so you
can turn the chute directional control without
interrupting the snow throwing process. Refer to
Traction Control/ Auger Control Lock in Section 4 of this
manual.
Tire Chains (Optional Equipment)
Tire chains should be used whenever extra traction is
needed. Call our Customer Support Department as
instructed on Page 2 of this manual for information
regarding availability of tire chains and other optional
accessories for your snow thrower.
Operating Tips
NOTE: Allow the engine to warm up for a few minutes
as the engine will not develop full power until it reaches
operating temperature.
WARNING: Temperature of muffler and
surrounding areas may exceed 150oF.
Avoid these areas.
• Set the skid shoes 1/4" below the shave plate for
normal usage. The skid shoes may be adjusted
upward (to lower the shave plate) for hard-packed
snow. Adjust downward (to raise the shave plate)
whenusingongravelorcrushedrock.
• Remove snow immediately after it falls.
• Discharge snow downwind whenever possible.
• Slightly overlap each previous cleared path.
• Follow the precautions found under the heading To
Stop Engine to prevent possible freeze-up.
• Clean the snow thrower thoroughly after each use.

10
SECTION 6: MAKING ADJUSTMENTS
WARNING: NEVER attempt to clean chute
or make any adjustments while engine is
running.
Chute Assembly Adjustment
The distance snow is thrown can be adjusted by
adjusting the angle of the chute assembly. The sharper
the angle, the shorter the distance snow is thrown. To
adjust the chute assembly, loosen the wing knob found
on the let side of the chute and pivot the upper portion
of the chute. Retighten the wing knob once the desired
position is reached. See Figure 8.
Figure 8
Chute Directional Control
Support Bracket Adjustment
If the spiral at the base of the chute directional control
isn’t fully engaging with the notches in the lower chute
assembly, the support bracket can be adjusted inward
or outward as follows:
• Loosen, but do NOT remove the two hex nuts
which secure the chute directional control support
bracket to the snow thrower housing. See Figure 9.
Figure 9
• Adjust the support bracket inward or outward so
that the spiral is fully engaged in the notches on the
chute before retightening the hex nuts.
Auger Control Adjustment
Refer to the information found under the heading Final
Adjustments in Section 3 of this manual to adjust the
auger control.
Skid Shoe Adjustment
The space between the shave plate and the ground can
be adjusted by raising or lowering the skid shoes. Refer
to Skid Shoe Adjustment in Section 3 of this manual.
Traction Control Adjustment
Refer to the information found under the heading Final
Adjustments in Section 3 of this manual to adjust the
traction control. If you are uncertain that you have
reached the correct adjustment, proceed as follows:
WARNING: Drain the gasoline out of your
snow thrower’s engine, of place a piece
of plastic film under the gas cap to avoid
spillage BEFORE beginning to perform
this adjustment.
• Tip the snow thrower forward, allowing it to rest on
the auger housing.
• Remove the frame cover underneath the snow
thrower by removing six self-tapping screws.
With the traction control released, there must be
clearance between the friction wheel and the drive plate
in all positions of the shift lever.
With the traction control engaged, the friction wheel
must contact the drive plate. See Figure 10.
Figure 10
Wing Knob
Hex Nuts Support Bracket
Spiral
Friction
Wheel
Gear Shaft
Drive
Plate

11
If adjustment is necessary:
• Loosen the jam nut on the traction drive cable and
thread the cable in or out as necessary.
• Retighten the jam nut to secure the cable when
correct adjustment is reached.
• Reassemble the frame cover.
NOTE:
If you placed plastic film under the gas cap, be
certain to remove it before operating the snow thrower.
Shift Rod Adjustment
To adjust the shift rod, proceed as follows.
• Remove the hairpin clip and slide the connector up
to separate the upper shift rod from the lower shift
rod. See Figure 11.
Figure 11
• Place shift lever in sixth (6) position.
• Rotate the shift arm counterclockwise (from the
operator’s position) as far as it will go.
• Thread the upper shift rod downward until the
elbow on its lower end aligns with the hole found in
the lower shift rod.
• Reconnect the upper shift rod to the lower shift rod
by reinserting the hairpin clip removed earlier and
sliding the connector back down into place.
IMPORTANT: Make certain to check for correct
adjustment of the shift rod as instructed under the
heading Final Adjustments in Section 3 of this manual,
before operating the snow thrower.
Drive Wheels
The wheels may be adjusted for two different methods
of operation. The adjustment is made by placing the
click pins in one of two different holes on the right side
of the unit. See Figure 12.
Figure 12
One Wheel Driving—Inserttheclickpinonly
through the outside hole of the axle (NOT the rim)
on the right side of the snow thrower. This position
gives power drive to the left wheel only, making the
unit easier to maneuver.
Both Wheels Driving—Insert the click pin through
the hole in the hub of the rim and the INSIDE hole
on the snow thrower’s right axle. This position is
good for heavy snow as there is power drive in both
wheels.
IMPORTANT: NEVER operate the snow thrower with the
click pin inserted through both the RIM and the
OUTSIDE HOLE in the axle. Doing so can result in
serious damage to the drive system.
Shift Lever
Ferrule
Shift Arm
Hairpin
Clip
Lower Shift Rod
Upper Shift Rod
Connector
Inside Hole
in Axle
Click Pin
in Outside Hole

12
SECTION 7: MAINTAINING YOUR SNOW THROWER
Lubrication
WARNING: Disconnect the spark plug wire
and ground against the engine before
performing any maintenance procedures.
Engine
Refer to the separate engine manual packed with your
unit for all engine lubrication instructions.
IMPORTANT: When following instructions in separate
engine manual for draining oil, be sure to protect frame
to avoid oil dripping onto transmission parts.
Traction Control / Auger Control Lock
The cams on the ends of the control rods which
interlock the traction drive and auger drive clutches
must be lubricated at least once a season or every
twenty-five hours of operation. The cams can be
accessed beneath the handle panel. Use a multi-
purpose automotive grease.
Gear Shaft
Lubricate the gear shaft with 6-n-1 grease at least once
a season or after every 25 hours of operation (available
at auto parts stores, or order part number 737-0170).
RefertoFigure10.
Wheels
• Oil or spray lubricant into plastic wheel bearings
inside the wheel hubs at least once a season.
Remove wheels, clean and coat axles with a multi-
purpose automotive grease. See Figure 13.
Figure 13
Gear Shaft
Lubricate the gear shaft with 6-n-1 grease at least once
a season or after every 25 hours of operation (available
at auto parts stores, or order part number 737-0170).
RefertoFigure10.
IMPORTANT: Keep all grease and oil off of the rubber
friction wheel and aluminum drive plate.
Auger Shaft
• At least once a season, remove the shear bolts on
the auger shaft. Oil or spray lubricant inside and on
the plastic bearings on the shaft. See Figure 14.
Figure 14
Drive and Shifting Mechanism
At least once a season or after every 25 hours of
operation, remove rear cover. Lubricate any chains,
sprockets, gears, bearings, shafts, and shifting
mechanism at least once a season. Use engine oil or a
spray lubricant. Avoid getting oil on rubber friction
wheel and aluminum drive plate. RefertoFigure10.
Chute Directional Control
The spiral on the end of the chute directional control
and the base of the discharge chute itself should be
lubed with multi-purpose automotive grease once a
season. See Figure 15.
Figure 15
Axle
Oil or use Spray Lubricant
Click Pin
Plastic Bearings
Shear Bolts
Lube Spiral
and Chute Base

13
SECTION 8: SERVICE
WARNING: Disconnect the spark plug wire
and ground against the engine before
performing any repairs or maintenance.
Engine
Refer to the separate engine manual packed with your
unit for all engine related maintenance procedures.
Belt Removal And Replacement
WARNING: Disconnect the spark plug
wire from the spark plug and ground.
AugerBelts
• Remove the plastic belt cover by removing the two
self-tapping screws. See Figure 16.
Figure 16
• Drain the gasoline from the snow thrower.
• Tip the snow thrower forward so that it rests on its
auger housing and remove six self-tapping screws
from the frame cover underneath the snow thrower.
• Roll the belt off the engine pulley. See Figure 17.
Figure 17
• Unhook the idler spring from the hex bolt on the
auger housing. See Figure 18.
Figure 18
• Back out the stop bolt until the support bracket
rests on the upper auger pulley. See Figure 19.
Figure 19
NOTE:
Loosening the six nuts that connect the frame to
the auger housing may aid in belt removal.
• Lift the rear auger belt from the auger pulley, and
slip belt between the support bracket and the auger
pulley. See Figure 18. Repeat this step for the front
auger belt.
• Replace both auger drive belts by following
instructions in reverse order.
Self-Tapping Screws
Belt
Cover
Auger Pulley Drive
Belt
Engine
Pulley
Engine
Pulley
Idler
Pulley Idler
Pulley
Auger
Belt
Friction Wheel
Support
Bracket
Auger Belt
Frame
Auger
Pulley
Idler
Spring Auger
Housing
Support
Bracket
Spring
Friction Wheel
Friction
Drive Belt
Support Bracket
Stop
Wheel Disc
Auger Pulleys
Bolt

14
Drive Belt
• Follow the first four steps of the instructions for
servicing the auger belts.
• Pull idler pulley up, and lift belt off engine pulley and
friction wheel disc. See Figure17.
• Back out the stop bolt until the support bracket
rests on the auger pulley. See Figure 19.
• Slip belt between friction wheel and friction wheel
disc. See Figure 19. Remove and replace belt.
• Reassemble following the instructions in reverse
order.
NOTE:
The support bracket must rest on the stop bolt
after the new belt has been assembled. See Figure 19.
Servicing Friction Wheel Rubber
The rubber on the friction wheel is subject to wear and
should be checked after 25 hours of operation, and
periodically thereafter. Replace the friction wheel
rubber if any signs of wear or cracking are found.
• Drain the gasoline from the snow thrower.
• Tip thesnow throwerupand forward,so thatit rests
on the housing.
• Remove six self-tapping screws from the frame
cover underneath the snow thrower.
• Remove the click pins which secure the wheels,
and remove the wheels from the axle.
• Using a 7/8" wrench to hold the shaft, loosen, but
do not completely remove, the hex nut and bell
washer on the left end of gear shaft. See Figure 20.
Figure 20
• Lightly tap the hex nut to dislodge the ball bearing
fromtheright sideof framebeforeremovingthe hex
nut and bell washer from left end of shaft.
• Move the gear shaft to the right and slide the friction
wheel assembly from the shaft.
Figure 21
• Remove the six screws from the friction wheel
assembly (three from each side). Remove the
friction wheel rubber from between the friction
wheel plates. See Figure 21.
• Reassemble new friction wheel rubber to the
friction wheel plates and hub, tightening the six
screws in rotation and with equal force.
• Position the friction wheel assembly up onto the pin
of the shift rod assembly, and slide the shaft
through the assembly. Reassemble in reverse
order.
Shave Plate and Skid Shoes
Theshaveplateandskidshoesonthebottomofthe
snow thrower are subject to wear. They should be
checked periodically and replaced when necessary. To
remove the skid shoes,proceed as follows:
• Remove the four carriage bolts, bell washers and
hex nuts which attach them to the snow thrower.
• Reassemble new skid shoes with the four carriage
bolts, bell washers (cupped side goes against skid
shoes) and hex nuts. Make certain the skid shoes
are adjusted to be level.
To remove shave plate, remove the carriage bolts,
belleville washers and hex nuts which attach it to the
snow thrower housing. Reassemble new shave plate,
making sure heads of the carriage bolts are to the
inside of the housing. Tighten securely.
Augers
Theaugersaresecuredtothespiralshaftwithtwo
shear bolts and hex lock nuts. Refer to Figure 14. If you
hit a foreign object or ice jam, the snow thrower is
designed so that the bolts may shear. If the augers will
not turn, check to see if the bolts have sheared.
IMPORTANT: NEVER replace the auger shear bolts with
standard hex bolts. Any damage to the auger gearbox
or other components as a result of doing so will NOT be
covered by your snow throwers warranty.
Hex Nut /
Bell Washer
NOTE: Snow thrower shown resting on its
auger housing. Wheels not shown for clarity.
Friction Wheel Rubber
Screws
Screws
Friction Wheel Plates
Hub

15
SECTION 9: OFF-SEASON STORAGE
WARNING: Never store engine with fuel in
tank indoors or in 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.
• Ifunitistobestoredover30days,prepareengine
for storage as instructed in the separate engine
manual packed with your unit.
• Remove all debris from the exterior of the engine
and equipment.
• Follow the lubrication recommendations found in
Section 7 of this manual.
• Always store the snow thrower in a clean, dry area.
NOTE:
When storing any type of power equipment in
an unventilated or metal storage shed, care should be
taken to rust proof the equipment. Using a light oil or
silicone, coat the equipment, especially any chains,
springs, bearings and cables.

16
SECTION 10: TROUBLESHOOTING
Problem Cause Remedy
Engine fails to start 1. Fuel tank empty, or stale fuel.
2. Blocked fuel line.
3. Choke not in ON position
4. Faulty spark plug.
5. Safety key not in ignition switch on engine.
6. Spark plug wire disconnected.
7. Primer button not being used properly.
8. Fuel shut-off valve closed.
1. Fill tank with clean, fresh gasoline.
Fuel becomes stale after thirty days
unless a fuel stabilizer is used.
2. Clean the fuel line.
3. Move switch to ON position
4. Clean, adjust gap or replace.
5. Insert the key fully into the switch.
6. Connect spark plug wire.
7. Refer to the engine manual for proper
priming instructions.
8. Open fuel shut-off valve.
Engine runs erratic 1. Unit running on CHOKE.
2. Blocked fuel line or stale fuel.
3. Water or dirt in fuel system.
4. Carburetorout of adjustment.
1. Move choke lever to OFF position.
2. Clean fuel line. Refill with fresh fuel.
3. Drain fuel tank and carburetor. Refill
with fresh fuel.
4. Refer to the engine manual packed
with your unit or have carburetor
adjusted by an authorized engine
service dealer.
Loss of power 1. Spark plug wire loose.
2. Gas cap vent hole plugged.
3. Exhaust port plugged.
1. Connect and tighten spark plug wire.
2. Remove ice and snow from gas cap.
Be certain vent hole is clear.
3. Refer to the Maintenance section of
the engine manual.
Engine overheats 1. Carburetor not adjusted properly. 1. Refer to the engine manual or have
the carburetor adjusted by an
authorized engine service dealer.
Excessive vibration 1. Loose parts or damaged auger. 1. Stop engine immediately and
disconnectsparkplug wire.Tighten all
bolts and nuts. If vibration continues,
have unit serviced by an authorized
service dealer.
Unit fails
to propel itself 1. Traction control cable in need of adjustment.
2. Drive belt loose or damaged.
1. Adjust traction control cable. Refer to
Section 6 of this manual.
2. Replace drive belt. Refer to Section 8
of this manual.
Unit fails
to discharge snow 1. Discharge chute clogged.
2. Foreign object lodged in auger.
3. Auger control cable in need of adjustment.
4. Auger belt loose or damaged.
1. Stop engine immediately and
disconnect spark plug wire. Clean
chute area and auger housing.
2. Stop engine immediately and
disconnect spark plug wire. Remove
object from auger.
3. Adjust auger control cable. Refer to
Section 6 of this manual.
4. Refer to Section 8 of this manual.

17
Ref.
No. Part No. Part Description
1. 618-0123 RH Housing
2. 618-0124 LH Housing
3. 710-0642 Self Tapping Screw, 1/4-20 x .75
4. 711-0910 Spiral Axle, 28”
5. 714-0161 Hi-Pro Key, 3/16 x 5/8
6. 715-0143 Spring Spirol Pin, .25 x 1.25
7. 717-0528 Worm Gear, 20-tooth
8. 717-0526 Worm Shaft
9. 718-0186 Thrust Collar
10. 721-0325 Grease Plug
11. 721-0327 Grease Seal
12. 736-0351 Flat Washer, .76 x 1.5 x .030
13. 736-0369 Flat Washer, .508 x 1.0 x .020
14. 736-0445 Flat Washer, .76 x 1.5 x .060
15. 741-0662 Flange Bearing, .75 x 1.0 x .59
16. 741-0663 Flange Bearing, .503 ID x .75 OD
17. 618-0122 Gear Assembly Complete, 28”
— 737-0168 Grease (Two Ounces)
Model 663
2
12
4
6
7
10
9
14
11
8
16
1
3
15
5
13
3
17
SECTION 11: PARTS LIST

18
Model 663
1
1
2
34
4
5
5
6
4
7
7
8
9
10
11
12
1
5
13
14
15
16
17
18
1
19
20
21
22
23
24
25
25
26
28
29
26
1
1
30
31
32
33
34 8
35
Drive Clutch
Cable Auger Clutch
Cable
Auger Clutch
Cable
Blower
Housing
36
20
20
37
37
38
39
40
27
41
42 42
43
45
1011
44

19
Model 663
Ref.
No. Part No. Part Description
1. 710-1652 Hex Screw
2. 784-5688 Drive Cable Guide Bracket
3. 784-5687 Auger Clutch Cable Bracket
4. 756-0625 Roller Cable
5. 738-0924 Hex Screw 1/4-28
6. 684-0030 Frame Assembly
7. 741-0563 Ball Bearing
8. 736-0105 Bell Washer
9. 712-0116 Lock Jam Nut
10. 741-0598 Hex Flange Bearing
11. 736-0188 Flat Washer
12. 784-5689A Front Support Guide Bracket
13. 710-0538 Lock Hex Screw
14. 736-0242 Bell Washer .340 ID x.872 OD
15. 714-0474 Cotter Pin
16. 736-0160 Flat Washer .536 ID x.930 OD
17. 710-0788 Hex Washer Screw 1/4-20
18. 784-5590 Frame Shift Bracket
19. 784-5638 Frame Cover
20. 710-0599 Hex Washer Screw 1/4-20
21. 736-0351 Flat Washer .760 ID x .50 OD
22. 717-1445 Gear
23. 714-0126 Key
24. 717-1444 7-Tooth Shaft
25. 715-0249 Roll Pin
26. 714-0143 Clik Pin
27. 684-0042B Friction Wheel Assembly
28. 656-0012A Friction Disc Wheel
29. 684-0013B Wheel Shift Rod Assembly
30. 746-0897 Drive Cable
31. 748-0190 Spacer
32. 684-0021 Friction Wheel Bracket Ass’y
33. 732-0264 Extension Spring
34. 712-0711 Jam Nut, 3/8-24
35. 746-0898 Drive Cable
36. 738-0830 Axle
37. 717-1445 Gear
38. 714-0126 Key
39. 717-1444 7-Tooth Shaft
40. 618-0063 Friction Wheel Bearing
41. 734-1525 Tire Only, 16 x 6.5 x 8
42. 741-0401 Sleeve Bearing
43. 734-0255 Air Valve
44. 734-1711 Wheel Rim
45. 734-1712 Wheel Ass’y(Incl. Ref. 41-44)
Ref.
No. Part No. Part Description

20
Model 663
1
2
3
45
6
78
9
10
11
12
14
15
13
16
10
918 19
20
21
22
23
13
25 23
22
26
18
27
28
13
30
30
31
32
31
32
33
16
18
35
34
36
37
38
39
41
40
42
17
40
39 29
24