Mooney M20B - Adjustments; Engine Idling Speed

F. INSTALLATION OF PROPELLER
I. Clean
and
check
the
mating
suI~faces
of
the
propeller
hub
flange
and the
rrahkshaftt
nange.
2.
Install the
"0"
ring
seal
in
the
propeller
hub
counterbore
and
lubricate
it
liberally
with
clean
lubricating
oil.
3.
Line
up
the
arrow
an
the
hub
flange
outer
diameter
with
the
short
bushing
in
the
crankshaft
flange.
4.
Engage
the
crankshaft
pilot
in
the
propeller
hub
and
push
the
propeller
hub
straight
back until
the
crankshaft
bushings
enter
the
holes
in
the
propeller
hub
flange.
5.
Avoid
twisti?g
and
shaking
of
prop,´•ller
as
much
as
possible,
as
damage
to
the
"O"
ring
could
result
and
oil
leakage
will
follow.
6.
Using
McCauley
propeller
mounting
bolts
nnly
with
special
shouldered
washers,
tighten
6
bolts
to
the
torque
recommended
by
manufacturer.
PROPELLER
TOF,~UE
LIMITS
Part Number
Nomenclature
Torque
Limits
‘McCzruley
Mounting
Bolts
55
to 65
Ft. Lbs.
G.
ADJUSTMENTS
i.
CARBURETOR
IDLE MT~XrZTRE.
a.
Perform
the standard
engine
starting procedure
and
operate
the
engine
at
least
two
minutes
to
warm
it
up_properly.
b.
Re‘cZuce´•thethrottl~to
obtaina
tachometer
reading
of
appSoximately
550
RPM.
c.
Turn
the idle
adjusting
screw,
located
near
the
rear
of
the
carburetor,
clockwise,
thinning
the
fuel
mixture.
Continue
to
do
this
until
the
engine
begins
to
run
roughly,
at
which
the.engine
speed
will
decrease.
d.
Turn the
screw
counterclockwise
until the
engine
runs
smoothly
again
and
continue
to
the
screw
in
the
same
direction
until
the
engine begins
to
run
roughly
once more.
At this
point
the
fuel~mixture
will
be
too
rich
and
engine
speed
will.decrease
again.
e.
Now
advance the
screw
to
the
midwav
position
between the
lean
and
rich
fuel
mixture;
the
RPM
of the
engine
will
reach
a
maximum
speed
for
idle
mixtui-e
settings.
2.
ENGINE
IDLING
SPEED
a.
With
engine
running
and
side
cowling
off,
pull
back
the
throttle
control
lever
until it
is
completely
aft
and
in the
closed
position.
Observe
the
tacho-
Imeter
for the
etgine speed.
b.
Adjust
the idle
adjustment
screw
to
obtain
from 550
to
600 RPM
by
rotating
itclockwiseto
increasethespeed
of
the
engine
and
counterclockwise
to
decrease the
engine
speed.
The
screw
is
located
on
the throttle
arm.
NOTE:
One
complete
revolution
of
the
carburetor idle
screw
provides
a
variation
d
approximately
100
RPM
in
idling
speed
--2"
I
OLDWILLWAYNE