Ski-Doo 440 User manual

ski-doD.
•
(in
-
'72 Owner'S Manual

We are proud that you have chosen the
Bombardier Ski-Doo* snowmobile for
your Winter recreational enjoyment and
wish to extend our congratulations
on
your membership into the World's Larg-
est Snowmobiling Fraternity -The Ski-
Doo snowmobilers.
Whichever model you have selected from
the
Nineteen-Seventy-Two Ski-Doa
snowmobile series, you will find that it
has been engineered and designed not
only to introduce today's standards but
so that you, the owner, will benefit of the
knowledge obtained through our policy
of continuous testing and improvement.
As impatient as you may be to try your
new Ski-Doo snowmobile, we strongly
recommend that
you read the entire
Owner's Manual before replacing
it in
the storage compartment.
This Owner's Manual was prepared to
aquaint you with the operation of the ve-
hicle and to inform you of the routine
maintenance procedures that must
be
periodically upheld.
'Trademark of Bombardier Limited
At Bombardier, we fully realize that the
purchase of a snowmobile is a very im-
portant decision. For this reason, we
have ensured that each Ski-Doo snow-
mobile is backed up by
an international
Ski-Doo Distributor and Dealer Network
who's factory trained personnel are
equipped to give you prompt and effi-
cient service wherever you are
in Snow
Country.
Furthermore, each dealer is prepared to
serve you with information, parts and
accessories. Feel free to contact him.
Lift cover flap
for illustrated listing
of internal and
external features
Bombardier Ltd. reserves the right to
make changes
in design and specifica-
tions,
and/or to make additions to or im-
provements
in its products without im-
posing any obligations upon itself to in-
stall them
on its products previously
manufactured.
This manual has been published by the
Technical Information Centre, Bombar-
dier Ltd., 8600 Decarie Blvd., Montreal
307, Ouebec.
*The following are trade marks of Bom-
bardier Limited
Ski·Doo
Ski-Boose
Nordic
Alpine
Valmont
T'NT
Elan ~
Blizzard
Skandic ,. ,... .
Carry -Boose
Bombardier
and the crest.
1

INTERNAL FEATURES
20 ________________________ ~
19 __________________________ ~~
18 __________________
4
17 _____________ ~~~
16 _______________ ~-
15 __________ ~~.
14 ______ ---,
10 9
1. Throttle Cable 6. Slider Suspension
2. Carburetor 7. Engine Mount
3. Fuel Filter 8. Drive Pulley
4. Steering Support 9. Drive Belt
5. Storage Compartment
10. Drive Chain
r-------1
2
11. Chain Tensioner
12. Steering Arm
13. Fuel Tank
14. Gear Box
15. Bib (overflow cup)
~_________ 6
16. Disc b-2/::
17. Dri'ler
c
_::,
18. Steeri
r
::::,=_--
19. MuffJ::--
20. Eng,',;::
I
i
- ~
j

EXTERNAL FEATURES
~ __ r--------------------------1
~mr------------------_2
_______________________ 3
______ 6
~---------------------4
20 __________________ ~~--~,~
19 __________ ---'
'~
18
'--- ___ l'
~ _______ 1"
11£-------------- 1:!J
1. Windshield
2. Handlebar
3. Oashpanel
4. Console
6. Backrest
7. Tail/Stop Light
8. Rear Bumper
9. Trailer Hitch
11. Reflector
12. Link Plate
13. Track Insert
14. Seat Lock Control
16. Pulley Guard
17. Overload Leaf Spring
18. Ski Tip Cover
19. Front Handle
5. Seat 10.
Snow Guard
15. Stirrups 20. Cab

INDEX
GENERAL INTRODUCTION ....
SERVICE AREAS ............... . 2
SERIES INTRODUCTION 3
SPECIFICATIONS 4
CLOTHING .. ............. 5
safety clothing -chill factor.
DRIVING HINTS. 6, 7
driving positions -turning -surface con-
ditions -tips.
DO'S ..
8
DONT'S 9
CONTROLSIINSTRUMENTS 10,11
steering -throttle lever ~ brake leyer -
ignition/lights switch -dimmer sWitch -
choke -manual starter -headlamp retract
lever -lighter -gear shift lever -tacho-
meter and speedometer -fuel gauge.
FUEL MIXING ... 12,13
which gasoline to use -which oil to use -
fuel mixing ratio -fuel consumption table
-fuel mixing procedure.
PRE-START CHECK. .............. 14
fuel tank quantity -track -steering opera-
tion -throttle and brake -(BREAK-IN).
STARTING PROCEDURE 15
electric starting -manual starting.
CUTAWAY VIEW. 16
LUBRICATION 17,18,19
cab -console removal -pulley guard re-
moval -drive belt removal -steering
mechanism -chain
case/gear box -sus-
penSion -driven pulley -drive pulley.
MAINTENANCE .............. 19,20,21,22
spark plug -battery (electrolyte level) -
suspension spring -track -track tension
-track alignment -carburetor adjustment
-drive belt condition -drive chain ten-
sion -battery connections -carburetor
flange nuts -muffler attachment -drive
belt wear -brake -steering adjustments -
engine head nuts -engine mount nuts -
vehicle general inspection.
TOOL KIT AND USES, IN CASE OF
EMERGENCy........ 23
emergency materials -assisting stranded
vehicles.
EMERGENCY GUIDE. 24
TROUBLE SHOOTING GUIDE. 25, 26
STORAGE .......... . 27, 28, 29
track -suspension -ski assembly -fuel
tank -carburetor -cylinder lubrication -
chain case -controls -pulleys -battery -
chassis.
GLOSSARY .. . 30
HOW TO IDENTIFY YOUR SKI-DOO
SNOWMOBILE ..................... ...........
31
parts and service.
WARRANTY 32

SERVICE AREAS
We recommend you contact your local Authorized Ski-Doo dealer when your Ski-Doo
snowmobile requires service. However, for further inquiries, you may contact your
Re-
gional Distributor listed below.
CANADIAN DISTRIBUTORS (Recreational Products Division). BOMBARDIER WEST INC.
609 West Broadway, Idaho Falls, Idaho 83401
California
Nevada
Montana
Idaho
Wyoming
Utah
Colorado
New Mexico
Arizona
Kansas
Nebraska
Washington
Oregon
Name of Distributors
ALPINE DISTRIBUTORS
3206 -28th Ave., Vernon, B.C.
ATLANTIC SKI-DOO LTD.
P.O. Box 670, Shediac, N.B.
BOMBARDIER ONTARIO LTD.
28 Currie St., Barrie, Ont.
BOMBARDIER QUE. LTD.
1350 Nobel St., Boucherville, Que.
BROOKS EQUIPMENT LTD.
P.O. Box 985, Winnipeg 21, Man.
HUDSON'S BAY CO.
121 Richmond W., Toronto, Ont.
J. W. RANDALL LTD.
P.O. Box 757, Corner Brook, Newfoundland
TRACT EQUIPMENT
LTD.
14325 -114th Ave., Edmonton, Alta.
Coverage Area
British Columbia
Prince Edward Island
Magdalen Island
Nova Scotia
New Brunswick
OntariO
Quebec
Manitoba
Saskatchewan
North-West
Territories
Newfoundland
Yukon
Alberta
AMERICAN DISTRIBUTORS (Recreational Products Division).
Name of Distributors
BOMBARDIER EAST INC.
Railroad St., Lee, Massachusetts 01238
2
Coverage Area
Massachusetts
Connecticut
Rhode Island
CRAIG TAYLOR EQUIPMENT
CO.
P.O. Box 3338, Anchorage, Alaska 99501
ELLIOTT & HUTCHINS INC.
East Main Street Road, Malone, New York 12953
HALVORSON INCORPORATED
325 South Lake Avenue, Duluth 2, Minn. 55802
HEATH INTERNATIONAL INCORPORATED
33737 - 32 Mile Road, Richmond, Mich. 48062
TIMBERLAND MACHINES INC.
10 Main
SI. North, Lancaster, New Hampshire 03584
Alaska
New York
Pennsylvania
New Jersey
Maryland
Delaware
District of Columbia
Virginia
North Dakota
South Dakota
Minnesota
Wisconsin
Iowa
Illinois
Missouri
Upper Michigan
Lower Michigan
Indiana
Ohio
Tennessee
Kentucky
W. Virginia
Maine
New Hampshire
Vermont

p
I
•
firJ
-
\:::rdic has everything you'd want and
:;\oect from the ultimate snowmobile.
::..1oerb styling and finish. Amazing com-
"::1. The power to move over tougher
~;;~~ain, up steeper slopes and through
:;;eper drifts. All of the styling and com-
":~ along with the new safety and con-
,s1ience features of '72. Including:
Ball Joints • Disc Brake • Aluminum
Chaincase • (or Gearbox) • Underseat
Storage· Longer Seat.
::ierything you could possibly want in a
_xury snowmobile. Nordic, with three
-odels for '72 ... The three most so-
:::l:sticated statements of Ski-Ooo* lead-
s·ship.
'-'"demark of Bombardier Limited
Canadian Patents Nos. 605,317 -710,-
592 -724,395.
U.S. Patents Nos. 2,899,244.
Canadian Designs
Rd. 1969, 1970.
Other patent and design applications
pending. 3

341 181 I
l!=~~~
-------89 --------1
4
SPECIFICATIONS
NORDIC R
No. of Cylinders Two Two Two
2 x 67.5
MM
2 x 67.5 MM' 2 x
76 MM
2 x 61 MM 2 x61 MM 2 x 70 MM
436.6 cc
Overall length
Height W/O windshield
36" 36" 36"
Weight (Ibs.) 405 440 474
Bearing Area 1242 sq. in. 1242 sq. in. 1242 sq. in.
Ground Pressure 0.326 0.354 0.382
Track (width)
18" 18" 18"
Standard Gear Ratio
16/34
16/34 19/33
Starting Manual Electric Electric
Lighting Coil (Watts)
75W
75W 120W
Spark Plug- (Bosch) M-240-T-1
Mo24,0-T-1
M-280-T-31
Spark Plug Gap .020" .020"
.020/1
Breaker Points .014"-.018/1 .014"-.018" .014"-.018/1
Tank Capacity -Imp. gals. 5.5 5.5 5.5
-U,S. gals. 6.875
_The above spark plug number is recommended when operating the vehicle at full throttle. However, whe-. 0':-
vailing conditions do not permit such operation, a hotter plug (M·225·T··10n 440 engines or M·260·T-10n tee :'-':
engine) can be installed to prevent possible fouling. To prevent piston failure, always reinstall standard p;c~ 'c'
high speed operation.
~
d

CLOTHING
To hundreds ofthousands of enthusiasts,
snowmobiling has added an entirely new
dimension to
WINTER. However, to truly
enjoy the fun, there is one item that is as
indispensable as your snowmobile-
warm, safety clothing.
Safety Clothing
Helmet (C.SA and A.SA (Z.90.1) ap-
proved).
Snowmobile suit: Reinforced at stress
areas -wind and water resistant.
Boots: Lightweight and waterproof.
Mitts: Strong -Padded -Windproof.
Goggles or Visor: Interchangeable len-
ses.
Tuque.
Chill Factor
As the Chart shows, even moderate tem-
peratures, when coupled with vehicle
speed or wind velocity, produce a chill
factor often as much as 20 to 30 degrees
below thermometer readings.
Bombardier Limited,the people who
know snowmobiling best have consider-
ed your comfort and safety with a com-
plete line of cold weather clothing. From
underwear to outerwear in high-fashion
styling, these garments and accessories
have been laboratory
and field tested to
keep you warm and give you the comfort
and freedom of movement that the sport
demands.
Marketed by Ski-Doo Sports Limited (a
subsidiary of Bombardier Limited) and
stocked exclusively
by authorized Ski-
Doo
dealers displaying the Ski-Doo
Sports Logo, you are guaranteed warm-
er, safer winters when you wear certified
Ski-Doo sportswear.
WARNING: Under no circumstances
should you wear loose clothing or
scarves that could become entangled
with moving parts of your snowmobile.
OF.
CHILL FACTOR CHART
5
35
32
30
27
25
21
20
16
15
10
5
0
-5
-10 -15
-20 -25
-30
Wind velocity or snowmobile speed
10 15
20 25 30
22 15 11 7 5
16 9 4 0 - 2
10 2 - 3 - 7 -10
4 - 5 -10 -15
Increasing dangerfrom freezing of exposed flesh
Great dangerfrom freezing of exposed flesh
~5
40
3 2
- 4 -6
-12 . -
14
-100
5

DRIVING HINTS
Driver confidence and capability are the
keys
to full enjoyment of your new Ski-
Doo snowmobile. For your first few runs,
select a large, clear, flat area then prac-
tice the uses and responses of the vari-
ous controls and get the feel and balance
of your vehicle.
When first using throttle and brake, most
beginners press and release the levers
too quickly, causing a corresponding
"jerking" of the machine. Instead,
squeeze the levers firmly and smoothly
so acceleration and braking are even.
When braking, remember that snow-
mobiles have a broad, flat track
in con-
tinuous contact with the ground,
so that
the vehicle immediately starts
to slow of
its own accord
as soon as the throttle
lever is released. For most circum-
stances, this natural slowing action plus
a gentle pressure
on the brake are more
than sufficient
to stop the vehicle.
Driving Positions
There are 3 main driving positions on a
snowmobile -
(1) Standing, (2) Kneel-
ing, and
(3) Sitting.
Each presents certain advantages de-
pending
on the nature of the terrain, the
snow conditions, speed of the vehicle,
the turns you desire or the personal pref-
erence of the driver.
(1) Standing -a position often adopt-
ed by beginners, allows for better weight
6
distribution and permits you to respond
to the movement of your snowmobile
with surer control. With this position,
however, always keep your knees slightly
flexed to absorb surface shocks.
The position
is undoubtedly the best for
steep hills, climbing or going down, a
short stretch of very bumpy trail or when
manoeuvering
in deep snow.
(2) Kneeling -crossing a steep slope,
for example, from side to side, you will
find the kneeling position a definite ad-
vantage. Place one foot
on the footboard
(on the high side of the hill), the opposite
knee
on the seat, then lean into the hill.
If leaning left, your left foot should be on
the footboard, your right knee on the
seat, and vice-versa.
WARNING: Side hills and steep slopes
are
not recommended for a beginner.
An alternate recommended kneeling po-
sition and one that is frequently used, is
to place both knees
on the seat, with one
foot on each side, loosely pressing
against the seat. This position is useful
should you encounter bumpy trails where
sitting
is uncomfortable.
(3) Sitting -for all normal driving, the
most comfortable position
is the sitting
position. Toes should
be held loosely in
the stirrups, body about midway back on
the seat and body weight distributed
evenly between the seat and footboards.
Quick Tips
When necessary to turn your snowmobile
around by hand, always lift back end
rather than front.
If you have to turn your vehicle around by
hand
in deep or loosely packed snow,
first press down firmly
on the tips of your
skis. This will raise the trailing edges,
so
that they do not dig in while vehicle is
being turned.
Turning
In turning, you will quickly find that often
you cannot rely
on the handlebars alone
to turn within the circle you desire. Part
d

of the fun of snowmobiling is that each
turn depends on 4 factors -the radius
of the turn, vehicle speed, snow condi-
tions and the weight
on the skis.
To make those tight, fast turns that are
the mark of the experienced driver, you
must learn to use the weight or position
of your body, shifting to left or right
as
the turn demands and keeping your cen-
tre of gravity
as low as possible.
In soft or lightly packed snow, the theory
of weight shifting
is that by leaning the
body toward the inner side of the turn
you increase the pressure on that edge
of the track and correspondingly lighten
the other edge.
In effect, you create a
bank of snow under the lighter edge,
so
that the vehicle is banked when turning.
On hard packed snow, leaning in toward
the turn and at the same time keeping
your centre of gravity
as low as possible,
counterbalances the natural tendency of
any vehicle to tilt when turning.
Also, moving your body weight toward
the front of the vehicle, particularly,
in
hard-packed snow, adds pressure to the
skis and ski runners
so that they bite
more deeply into the snow surface.
IMPORTANT: Thoroughly know your
vehicle and how to drive it before at-
tempting difficult or rapid manoeuvres.
Surface Conditions
Deep Snow -Your new Ski-Doo snow-
mobile is designed to negotiate almost
any snow surface, including deep or
newly-fallen snow. Two things are im-
portant however, -
(1) don't overload
your machine (i.e. travel alone, not with
passengers) and
(2) maintain a reason-
able forward speed at all times. Don't
accelerate beyond the track's ability to
cope with the surface underneath, and
don't stop.·
Use the standing position recommended
earlier and if your vehicle continues to
make reasonable headway, responding
to light changes
in acceleration, you are
safe enough to explore new areas.
.,
;....
11·
\ \ ,\1 I I
Icy Surface -Ice or extremely hard-
packed snow can be difficult to negotiate
as both skis and track do not have much
traction. Best advice is to slow down and
avoid rapid acceleration or braking.
Tips
For vehicles equipped with a slider sus-
pension: During normal driving, snow
will act
as a lubricant and coolant for the
slider shoes. Extensive riding
on ice or
sanded snow, (not to mention dirt, as-
phalt, etc. never recommended) may
create excessive heat build up and cause
premature slider shoe wear.
7
...---------------------------------------"

DO'S
• Register your Ski-Doo snowmobile at
your nearest Licensing Bureau, where
State or Provincial Laws require it, and
affix Registration Plate
to the vehicle.
Carry your registration certificate with
you.
It provides proof of ownership in the
event that the vehicle becomes lost or
stolen.
• Obtain your State or Provincial booklet
on snowmobiling. It gives valuable in-
formation
on the neighbouring snow-
mobile trails and the laws governing
snowmobiling in your particular area.
• Always carry emergency materials and
supplies. Your local Ski-Doo dealer has
a Safety Centre prepared specially for
you.
• Let every riding member of your family
read the entire Owner's Manual. The
knowledge and confidence gained will
reduce the risk element.
• Observe all posted snowmobile signs.
Not all private landowners allow snow-
mobiling on their property. You can have
just
as much fJ,.Jn, even more so, by trav-
eling elsewher~.
• Before you start out, check to be sure
that you and each member of your party
are equipped with sufficient warm cloth-
ing and safety helmets.
•
When snowmobiling with others, limit
your actions to the experience of the
main body. Show the inexperience driver
how to properly handle a snowmobile.
8
• Use the 'buddy" system. Always travel
with at least one other snowmobile, es-
pecially in unfamiliar terrain or on trail
rides. Even in snowmobiling, a pair beats
one of a kind.
• If you are planning to explore new
areas, leave word of your approximate
whereabouts and estimated time of re-
turn with someone. Remember, a snow-
mobile can often travel farther in 15 min-
utes than you
can walk in a day.
• Always make a full stop, then look
carefully
in both directions before cross-
ing roads.
When traveling in pairs or in
a group, have one member direct the
others across, singly.
•
Use a rigid hitch or tow-bar when pull-
ing any sled or trailer behind your Ski-
Doo snowmobile. Rigid hitches prevent
tailgate collision when going downhill or
on sudden stops.
• Be extremely careful when giving
children a ride. Go more slowly and
check frequently. Small children, are far
safer
in a Ski-Boose* sled than on the
seat of your snowmobile.
•
When trailering your Ski-Doo snow-
mobile, secure it solidly at both ends,
protect it with a bright cover (Ski-Doo*
cover) then check that trailer hitch and
safety chain are secure and that brake,
flashers and parking lights are all in
working order.
'Trademark of Bombardier Limited
I
..

DONT'S
• Don't cut across in front of the line of
travel of another snowmobile. Don't tail-
gate; collision, or the threat of
it, is se-
rious with any moving vehicle.
• Don't risk injury or damage to your
machine with needless and foolish stunt-
ing. Don't
"jump" your snowmobile. This
part of snowmobiling should
be left to
the professional
"stunt" men.
• NEVER ride on railway tracks. The
sounds of your moving vehicle drown out
noise of approaching trains. Your vehicle
may also become caught
in track junc-
tions. In many States and Provinces
snowmobiling on railway tracks consti-
tutes
an infraction of the law.
• Never cut through fences or attempt
to run over them. Give a wide berth to
telephone poles. Hidden guy wires, un-
seen from a distance, can cause seri-
ous accidents.
• Don't lend your snowmobile to inex-
perienced or under-age drivers.
In many
cases it
is the vehicle owner and not the
rider that
is responsible for mishaps.
Check State or Provincial minimum age
limits for drivers.
• Unless you are certain of a fueling
stop, never travel further than
112 of the
fuel remaining
in your tank. Even then,
leave yourself a safety margin. Remem-
ber that a snowmobile does not neces-
sarily travel the same distance each time
on the same amount of fuel. A lot de-
pends
on speed, the snow conditions of
the trail and the adjustment of the car-
buretor.
• Don't drive your snowmobile in the
vicinity of skiers and keep off ski trails.
Always respect the rights of those who
enjoy winter
in another way.
• NEVER ride on earth, grass, asphalt or
like bare surfaces.
• "If you drink don't snowmobile! If you
snowmobile, don't drink!" Remember
Alcohol and gasoline don't mix.
• Don't overload your snowmobile. A
Ski-Boose sled or other trailer carries far
more than your snowmobile can, with-
out noticeable loss of efficiency or man-
oeuverabi/ity.
• Don't cross a river or lake without first
being positive that the thickness of the
ice is sufficient to support both you and
your vehicle. Your life may depend
on it.
If at all in doubt, take an alternate route.
• Don't ride on public streets, roads or
highways. The single largest cause of
accidents have occured when snow-
mobiles and automobiles mix.
• Don't leave your keys in the ignition
switch. It prevents
an invitation to thieves
and a danger
to children.
9

CONTROLS/INSTRUMENTS
Steering
Your Ski-Doo snowmobile follows the di-
rection
in which the handlebar is rotated.
To turn to the right, rotate handlebar
right.
To turn to the left, rotate left.
B
E
K
D
10
Throttle Lever (A)
Located on right handlebar When lever
is depressed, engine speed increases.
When released, it automatically returns
to IDLE. Engine speed is proportionate
to the applied pressure on the lever.
G
Brake Lever (B)
Located on left handlebar. When lever is
depressed, the brake is applied. When
released, it automatically returns to its
original position. Braking effect
is pro-
portionate
to the applied pressure on the
lever.
Ignition/Lights Switch (C)
(Manual Model only)
Key operated, 3 position switch (OFF/
ON/LIGHTS). To start engine, first turn
key clockwise
to ON position. To stop
engine, turn key counter-clockwise
to
OFF position. Turning key fully clock-
wise, with engine running, illuminates
both headlamp and taillight.
Ignition/Lights Switch
(Electric Models only)
Key operated, 4 position switch, (OFF/
LIGHTS/ON/START). To start engine,
turn key fully clockwise to START posi-
tion and
hold. Return key to ON position
immediately engine has started. To il-
luminate both headlamp and taillight turn
key to LIGHTS position.
Dimmer Switch (D)
Located on left side of dashpanel. De-
press switch to obtain
HI or LOW head-
lamp beam.
,

Choke (E)
A push-pull button located on left of
dashpanel. Pull button to engage choke,
push to disengage. The choke should
always
be used for easier cold engine
starts. After engine
is warmed up how-
ever, it
is not necessary to use choke
when starting.
Note: The purpose of the choke is to re-
duce the amount
of air flowing through
the carburetor, in effect enriching the
fuel! air mixture. However, leaving choke
on after engine has started activates car-
bon formation inside the engine. There-
fore,
alw~ys turn choke knob to OFF,
once engme has started. NEVER OPER-
ATE YOUR VEHICLE WITH CHOKE ON.
Manual Starter (G)
Auto-rewind type located on engine fly-
wheel side, (lower right side). To start
engine, pull handle. (See Starting Proce-
dure, page 15).
Headlamp Retract Lever (H)
Two position, (PUSH/PULL) lever, locat-
ed at right side of cab. To expose head-
lamp pull lever, push to retract. The angle
of your headlamp beam has been pre-
adjusted prior to delivery. Should you
wish readjustment, turn upper screw to
raise or lower beam. Turn lower screws
to adjust beam direction.
WARNING: Before starting out or after
adjustments, make sure lever and boits
are securely hooked or fastened.
Lighter (J)
Standard equipment on Electric models,
located
on right side of dashpanel. Push
in to activate, lighter pops up automati-
cally when lit.
Gear Shift Lever (K)
A 3 position, (FORWARD/NEUTRAL/
REVERSE) gear shift lever is standard on
640E model only. Push UP for forward,
CENTRE for neutral and DOWN for re-
verse.
Note: It is recommended that reverse be
used only on
packed snow and at very
low speed.
WARNING: Do not activate gear shift
lever while snowmobile
is in motion.
When
in neutral, the brake is not oper-
ational. Therefore, NEVER
run the en-
gine at high R.P.M. while in neutral
gear.
Tachometer &Speedometer
A Tachometer (dashpanel left) and
Speedometer (dashpanel right) are
standard
on Model 640E, optional on
Models 440 and 440E.
Fuel Gauge
A cork float activates fuel level gauge
built-in to fuel tank cap assembly.
To
check fuel supply, open access cover.
As an additional standard feature, all
models are equipped with
an overflow
cup so that gasoline spills will run off
outside the vehicle.
11

FUEL MIXING
Regular
oil
2011
or
With Ski-Doo snowmobiles, the OIL must
be added to the GASOLINE
in pre-meas-
ured amounts then both oil and gasoline
should be thoroughly mixed together,
BEFORE fueling the tank.
The importance of using the correct fuel
mixture cannot be over-stressed. Prior
experience has shown that the largest
cause of engine damage is from incor-
rect fuel mixtures.
12
Which Gasoline to Use
The correct gasoline for your Ski-Doo
snowmobile
is regular gasoline, (not
less than 88 octane) available from all
service stations.
CAUTION: Never experiment with differ-
ing fuels or fuel ratios. Never use pre-
mium gasoline, naphta, methanol or sim-
ilar products.
Which Oil to Use
Use only Ski-Doo* oil available in reg-
ular
or concentrated form. Both types
have especially formulated oil bases to
meet the lubrication requirements of the
Bombardier-Rotax engine.
CAUTION: Unless absolutely necessary
(in case of emergency) do not use out-
board or straight mineral oil. Never use
multi-viscosity oils.
Fuel Mixing Ratio
When using REGULAR SKI-DOO OIL,
the correct mixture is 20/1.
5 GALLONS, REGULAR GASOLINE plus
1 QUART, REGULAR SKI-DOO OIL =
CORRECT FUEL MIXTURE.
When using CONCENTRATED SKI-DOO
OIL, the correct mixture is
40/1.
5 U.S. GALLONS or 4 IMPERIAL GAL-
'Trademark of Bombardier Limited
LONS REGULAR GASOLINE plus 1 PINT
CONCENTRATED SKI-DOO OIL = COR-
RECT FUEL MIXTURE.
Note: To facilitate fuel mixing, concen-
trated Ski-Doo oilshould be kept at room
temperature.
Fuel Consumption Table
Throttle
R.P.M.
H.P.
Time-
w
0 Max. 6500 28
1h.48m.
"'"
"'"
o!S
% 6500
21
2h.12m.
0
"'"
'h 4500
14
3h.18m.
"'"
In
Gi %
'C
4500 7 6h.36m.
0 Fuel Tank Capacity
==
5.5 Imp. gals./6.875 U.S. gals.
Throttle
R.P.M.
H.P.
Time-
Max. 5500
w 35
1h.30m.
0 % 5500 26.25 1h.45m.
"'"
CD
Gi
'h
4500
'C
17.5 3h.45m.
0 % 4500 8.75 5h.55m.
==
Fuel Tank Capacity
5.5 Imp. gals./6.875
U.S. gals.
-Running Time (in Hours and Minutes)
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The Fuel Consumption table must be
construed
as approximate only. Results
have been obtained by running static
tests under full load, but cannot take into
account such factors
as snow conditions,
carburetor adjustments, etc.
Fuel Mixing Procedure
To mix the gasoline and oil always use a
separate clean container. Never mix
directly
in your snowmobile tank.
Note: For best results, acquire two con-
tainers, either plastic or metal. Draw from
one until empty then use the second one.
Meanwhile, refill the first as soon as con-
venient.
WARNING: Gasoline is flammable and
explosive under certain conditions.
Store in a well ventilated area. Always
stop the engine and do not smoke or
allow open flames or sparks near the
vehicle when refueling. If gasoline
fumes are noticed while driving, the
cause
should be determined and cor-
rected without delay.
1. Pour the full amount of Ski-Doo oil
required for the total mixture into the
container.
2. Add approximately half the amount of
gasoline to be mixed.
3. Shake the container thoroughly.
4. Add the remainder of the gasoline.
5. Once again thoroughly agitate the
container.
6. Using a funnel with a fine mesh screen
to prevent the entry of water and foreign
particles, transfer the mixture from the
container into the snowmobile tank.
Fuel Saving Tips
While waiting for companions to catch
up, or when stopping to rest on the trail,
turn your ignition
OFF. Not only do you
save fuel, but you lessen the chance of
spark plug fouling. Besides, a warmed-
up Ski-Doo snowmobile engine is excep-
tionally easy to start.
:~
13

PRE-START CHECK
Fuel Tank Quantity
Check that there is sufficient fuel in the
tank for your trip. A good habit
to acquire
is to refill the tank before starting out
each day.
Since mixed fuel has a tendency to settle
overnight, agitate the fuel in the tank by
standing on the footboards and rocking
the vehicle from side
to side.
Track (Daily, before first run)
Under certain climatic conditions, the
track of a snowmobile left outdoors over-
night may freeze to the ground or snow
surface. Always make sure that the track
is free before attempting to start the ve-
hicle. (This procedure will eliminate un-
necessary drive belt wear).
Steering Operation
Check operation of steering mechanism
by rotating the handlebars several times
from side to side.
If roughness or bindi.ng
is felt, check for ice or snow that may be
blocking the mechanism.
Throttle and Brake
Depress and release levers several times
to check that they operate easily and
smoothly. The throttle lever should return
to the idle position when released. The
brake lever should
be fully applied when
it
is 1" (minimum clearance) from the
handlebar grip. If the levers do not return
14
swiftly, remove cables and/or housings
and replace. Re-check lever operation.
Do not start the engine until levers re-
turn swiftly.
WARNING: Always check throttle and
brake operation before starting engine.
YOU MAY NOW START YOUR SKI-
DOO SNOWMOBILE.
BREAK-IN PERIOD
With Ski-Doo snowmobile engines,
a break-in period
is required before
running the vehicle at full throttle.
Manufacturer's recommendation for
the Bombardier-Rotax engine
is ten
(10) operating hours or the equivalent
fuel consumption,
(See page 12 for the
equivalent fuel consumption of your
vehicle). During this period, maximum
throttle should not exceed
%, except
momentarily to attain cruising speed
or avoid emergency. Before you took
delivery of your new Ski-Doo snow-
mobile, the carburetor was adjusted
by your Dealer for a rich fuel mixture.
This permits better lubrication
and
cooling of the engine. Do not readjust,
regardless of excessive smoke in the
exhaust.
Inspection
A.~ with any precision piece of me-
c,nanical equipment, we suggest that
after the first
10 hours of operation or
30 days after purchase whichever
comes first, that each Ski-Doo snow-
mobile has an inspection check. This
inspection, which should take approx-
imately 1112 hrs., is at the discretion
and expense of the vehicle owner.
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STARTING PROCEDURE
WARNING: Never run the engine at
HIGH R.P.M. when the track of the
vehicle is raised off the ground.
Whenever practical, place gear shift
lever in Neutral position when starting
engine.
The brake DOES NOT operate while
gears are
in Neutral therefore, use cau-
tion on inclined surfaces.
Electric Starting
For Models with electric starter:
1. Insert key in ignition switch (C).
B
E
o
2. Engage choke (E). (Choke is not ne-
cessary if engine
is warmed up.)
3. Test throttle operation then apply
throttle lever (A) slightly.
4. Turn ignition key clockwise until start-
er engages.
CAUTION: Do not engage starter longer
than 30 seconds.
If engine does not start on first try, key
must be turned fully back to OFF each
time. Allow starter
to cool for 2 minutes
before repeating procedure.
5. Release throttle and return key to ON
immediately engine has started.
6. Disengage choke (E).
CAUTION: Never operate the Ski-Doo
snowmobile with the battery removed
or
disconnected.
7. Allow the engine to warm up before
operating at full throttle.
Manual Starting
Every Ski-Doo snowmobile is equipped
with a manual starter (auto-rewind type)
located
on the right hand side of the
engine.
To start the engine manually:
1. Insert key in ignition (C) and turn to
ON position.
2. Engage choke (E). (Choke is not ne-
cessary if engine is warmed up).
3. Test throttle operation then apply
throttle lever (A) slightly.
4. Grasp manual starter handle (G) firmly
and pull slowly until a resistance is felt
then pull vigorously and engine will start.
Allow handle to return slowly to its origi-
nal position. If engine does not start, re-
peat the procedure.
Note: Do not pull starting rope to its full-
est extent
or allow starting handle to "fly
back" to its originalposition.
5. Release throttle (A) and disengage
choke
(E) immediately engine has started.
6. Allow the engine to warm up before
operating at full throttle.
15

MAINTENANCE AND LUBRICATION
WEEKLY
'M·*iiIlF'
( OW8
L4
W6
16
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