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BEECHCRAFTSundowner180
Section VII
C23 (M-1285
and
After)
Systems Description
power
settings
of 65% to 75%
should
be used
until a total of 50 hours has
accumulated
or
until
oil consumption
has
stabilized.
This
recommendation
is applicable
to
in-service
engines following cylinder
replacement
or
top-
overhaul of one or
more
cylinders,
as
well
as to
new engines.
COWLING
The cowling
is
the split-type
and is removable to expose
the engine
and
mount
assemblies.
LUBRICATION SYSTEM
The engine oil
system
is
the
wet-sump
type
and
has an 8-
quart
capacity. Oil operating temperatures
are controlled
by an automatic
thermostat
bypass control. The bypass
control will
limit
oil flow
through the
oil cooler when
operating
temperatures
are below normal,
and
will permit
the oil to bypass the cooler if it should become blocked.
CARBURETOR
HEAT
There
is
a
possibility
of
ice
forming in the induction sys-
tem
under
certain
moist atmospheric
conditions.
Gen-
erally
ice may
form
in
the vicinity of
the
carburetor butter-
fly and may build up enough that a drop
in power
output
could result. The
induction
installation
is
equipped
with
a
system
for
preheating
the incoming air to
the
carburetor.
The air preheater
is
essentially
a
tube or
jacket through
which
the
exhaust
pipe
from one
or
more cylinders
is
passed,
and the air f
lowing
over
these surfaces
is heated.
A
push-pull
control located
on
the
power quadrant
or
the
center
lever
on the'pedestal,
actuates
a
diverter gate
which
allows
the
hot
air to mix
with
the cold air in the
in-
duction chamber before it enters the carburetor.
For fur-
August, 1980
7-19
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