Mooney M20B - General Engine Information; Engine Troubleshooting

r:
SECTICN
)II
POWER
PLANT
A.
GENERAL
Thel#00NEr
M
203ispoweredby
the famous
Lycomiug 0-360-AID,
high
com-
pression
engine.
It
is
rated at
180
horsepower
at
2’i00
RPM
a?d
uses
dynafocal
engine
mounts to
dynamically
balance
the
engine
in
Zigh´•t
and
to
reduce tr3nsmission
of
vibration
to
the cabin.
It is the
newest
version
of this
type
engine
c~ind
incor-
porates
the
following
improvements:
1.
New-type
cylinders
which have
tapered
bores and
are
nitrided
for
extra
hardness.
2.
New
pistons,
compression
and
oil-scraper rings
for
longer
engine
life.
3. 180
degree
oil
temperature
thermostat
to
provide
optimum
oil
temperature
in
all
conditions
of
flight
and
to
give
better
vaporization
of
the
fuel-air
mixture in
the
intake manifold
This
engine
utilizes
the latest
ignition system
which
gi\res.quicker,
easier
starts
and
longer
ignition
life.
It
consists
of
the
following:
C
1.
Two
bendix
magnetos,
theleft
magn’eto-being
equipped
with
a
set
of
retard
breaker
points.
2.
A
starting
vibrator,
located
on
the
uplier
fire
wall,
and
which furnishes
a
shower
of
sparks
for
starting.
3.
A
switchwhich combines
both
ignition
and
starting
functions.
4
Shieided.spark plugs
and
ignition
harnesses
to
suppress
radio noises.
The
Lycoming
0-360-AID
engine
has
an
8.5
to
1
compression
ratio
and
requires
91/96 octane
fuel.
It also
uses a
McCauley
2D36C14
Constant
Speed
Propeller.
B’or
further
detailed~information
on
the
engine.
or
the_
propeller
refer’fo.the
turer’s
applica~ble
~publications.
B.
TROUBLESHOOTING
Troubles
peculiar
to
the
Mooney
Power
Plant
are
listed
in
Table
2
witli
their
probable
causes
and
suggested
remedies.
When
troubleshooting
this
engine,
we
´•’t--rktommend
that
the
magneto primary
circuit
be
grounded
before
performing
checks
on
the
ignition
system.
-17-.
OLDWILLWAYNE