Service manual
c
c
c
•
If
the
track
is
not
centered,
loosen
the
two
lock-
nuts
(1,
figure
15) on
that
side
where
the
edge of
the
track
is
closest
to
the
inside
edge of
the
tunnel.
Tighten
the
adjusting
screw
(3)
until
track
is
centered.
Figure 15
Never
run
the
engine
inside
a building
without
first
opening
all
doors
and
windows
to
insure
proper
ventilation.
• With
the
back
end of
the
snowmobile
raised,
start
the
engine. Allow
track
to
rotate
several
turns
and
then
recheck
track
alignment
to
ensure
that
proper
alignment
is
maintained.
•
Mter
track
alignment
is
complete,
tighten
all
locknuts
(1)
and then
check
traction
belt
tension
as
described
in
the
following
paragraph.
Traction Belt Tension Adjustment
IMPORTANT: Always
check
the
traction
belt
for
proper
alignment
before
performing
the
traction
belt
tension
adjustment
procedures.
•
Set
the
snowmobile
on a
clean,
flat
surface.
NOTE: A
properly
tensioned
track
should
have
a
1-
to
1-1/
4-inch
sag
at
the
approxim<\.te top
center
of
the
track
except
for
Model SDI8P21A, which
10
024 72
17
SERVICE
AND
REPAIR
should
have
a
1/2-
to
I-inch
sag
at
the
center.
This
can
be
determined
as
follows:
•
Rest
a
straight
bar
(figure
16) of
sufficientlength
along
the
top
surface
and
near
the
edge of
the
track.
Insert
the
straight
bar
through
the
back
end of
the
snowmobile
and
check
for
proper
sag.
Repeat
pro-
cedure
on
opposite
side
and
note
the
difference,
if
any,
in
the
track
tension.
STRAIGHT
BAR
1/2"
TO
1"
(MK
IV)
1'~
TO
1-1/4"
(MK
V)
Figure 16
•
If
adjustment
is
necessary,
loosen
the
two
lock-
nuts
(1,
figure
15) on
each
side
of
the
sled
just
sufficiently
to
allow
movement
of
the
belt-adjusting
angle
(2).
•
Turn
the
adjusting
screws
(3)
clockwise
to
tighten
and
counterclockwise
to
loosen
until
proper
track
tenSion
is
achieved.
IMPORTANT:
Adjust
both
screws
(3)
equally
so
as
not
to
disturb
the
track
alignment.
[~~~UTION
1
Never
run
the
engine
inside
a building
without
first
opening
ali
doors
and
windows
to
insure
proper
ventilation.
•
Raise
the
back
end of
the
snowmobile
until
the
track
clears
the
ground.
Start
the
engine and
allow
track
to
rotate
several
turns.
Then
repeat
the
track
tension
adjustment
procedure
to
ensure
that
proper
tension
is
maintained.
•
Retighten
the
locknuts
(1)
on both
sides
of
the
snowmobile.
Spark
Plug
Replacement
To
maintain
good engine
performance
the
condition
of
the
spark
plugs
should
be
checked
periodically
and
the
gap
reset
to
O.020-inch
using
feeler
gauge.