Operation - Yamaha SL292C 1971 Service Manual

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.
GENERAL -
Operation
1~
OPrERATION
1.
Warm-up and Break-in Procedures
Each time
the engine
is
started
it
should be allowed to reach normal operating temperature before
bei119
used.
When the
unit is
new,
full speed or
laborious
operation in
wet
snow should
be
avoided. After
10
t10L1rs
of
oper ation,
break-in is usually
complete, and the unit
will
run both better
and
cooler.
At the end of the
10
hour
break-in period,
it
would be advisable to throughly
check nuts, bo lts, and screws for
tightness.
Loose hardware
can cause excessive vibration and lead to damage
of
the
engine or chassis.
2.
Pre-Operational Checks
Before operating the
snowmobile, make it a habit to
check:
a.
Fuel - When fueling,
use straight gas. Check
amount
before
starting
out
.
Tt1e
fuel tank hold
s
approximately
f
ive
gal Ions
and
is located in
the shroLJd.
b.
Oil
-
Check
level of oil in autolube tank.
c.
Controls
- Check
to
make sure the brake and
throttle operate
correctly.
d.
Lighting
- Make sure al I
I
ighti
ng
equipment
is operable.
e.
Drive-belt
-
Inspect
the drive belt for
damage
and
adjustment.
f.
Track -
Check
the
track for cracks.
If
necessary, adjust the
tension
of
the track and
align
the track so
that
it
is
brought
to a centered position .
"
3. Sequence of Operations
'
a.
Turn
switch on
by
inserting key and turning
clockwise.
b.
Depress
carburetor
choke lever
-
(Return to its
original
position
when
the
engine
wi ll rev
smoothly).
c.
Pull the
starter -
Firmly
grasp
the starter handle and pull
slo\r..ily
until
engagement
of the
mechanism can be
felt.
Then, pull briskly,
but
be
careful
not
to pull the
cable
so far out
that
it
''bottoms''.
This
will
resu
lt
in longer
cable
I ife.
Sometimes
an engine will start better at a
certain
throttle
opening. A little practice w
il
I
insure in1mediate-start
ing.
d.
Warm up the engine -
Once the engine
is
running
cleanly, movement
of the throttl
e
lever
\Nill
increase engine
r.p
.m
.
and
cause engagement
of
the
drive
system.
e.
Regulate the speed
of
the
snowmobile with various throttle positions. Si nee
the throttl
e
is
sp
ring
loaded,
the
snowmobile will
stop and the engine will
return
to an idle
any
time the
hand is
removed from
th
e
lever.
f.
The disc brake
can
be used to
stop the
snowmobile.
It brakes
the
entire
drive
mechani
sm
.
It is
act uated
by the
lever
mounted on the left
side of the handle
lever.
4.
Service and Spare Parts
;?
H
a.
Always
check
your machine
periodically to prevent
damage
to parts because
of
improper ad
j ustments
or
wear of
it
II
other parts.
b.
Carry tools with you
at all
times
so
that minor
maintenance can be done when required. The
se
tools
should
incl
ude:
1.
Tool
kit
2.
Flashlight
3. Vinyl tape
4. Steel
wire
5.
Tow
rope
c.
Spare parts recommended as
a safety
measure.
1.
Drive belt
2.
Light bulbs
3.
Spark plugs
4.
Emergency
starter rope
d.
Fuel - When making long trips,
extra
fuel
and oil should be carried.
-
'
-10-

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