Raytheon Beech Baron E55 - Page 383

BARON 55
AND
58
SHOP
MANUAL
c.
Start
and
warm-up
the
engine
according
to
the
h.
When
the
idle
setting
has been
stabilized,
move
applicable
Pilot’s
Operating
Handbook.
the
cockpit
control lever with
a
smooth
steady
pull
into
NOTE
the
IDLE CUTOFF
position,
Observe
the
rpm
during
the
leaning
process.
Adjust
the
idle
mixture
to
obtain
The
engine
may
overheat
when
oper-
approximately
25/50
rpm
gain
in
the idle
speed
as
the
ated
on
the
ground
for
more
than short
mixture
control is
slowly
moved toward
the
IDLE CUT-
test
periods.
Exercise caution
as
over-
OFF.
(If
the mixture is
too
lean,
the
idle
speed
will
heating
will
occur even
sooner
with
part
drop
under the
same
conditions.)
The idle
mixture
of
the
cowling
removed.
Monitor
the
cyl-
adjustment
is
the
locknut
at
the
metering
valve end
of
inder head
temperature
and
oil
tempera-
ture,
the
linkage
between
the
metering
valve
and
the air
throttle
levers.
Tightening
the
nut
to
shorten the
link-
d.
Retard
the throttle
to
the
idle
position,
age
provides
a
richer mixture.
A
leaner
mixture
is
e.
Adjust
the
idle
speed
to
625
to
650
rpm
with
the
obtained
by
backing
off the
nut
to
lengthen
the
link-
spring-loaded
screw
located forward
of
the air throttle
age.
lever.
Turn
the
screw
clockwise
to
increase
the
rpm,
or
counterclockwise
to
decrease
rpm.
i.
After
each
idle mixture
adjustment
change,
clear
the
engine
by
running
it
up
to
2000
rpm
before mah-
f. Advance
the
throttle
to
2,000
rpm
then
return
it
to
ing
a
mixture
check.
the
idle
speed position
to
check
the
adjustment.
g,
Set
the
pump
pressure
at
idle RPM
(refer
to
Chart
j´•
If
the
idle
setting
does
not
remain
stable,
check
the
6-1)
using
the
relief valve
adjustment
screw
on
the
aft
idle
linkage;
any
looseness
in this
linkage
will
cause
centerline
of the
engine
fuel
pump.
Refer to
Figure
erratic
idling.
In
all
cases,
allowance should be
made
6-7.
Turn
the
screw
clockwise
to
increase
pressure
for
the
effect
of
weather conditions
upon
idling
adjust-
and
counterclockwise
to
decrease
pressure,
ments.
THRO~E
BODY
AIR
THROT~LE
LEVER
,,,tl
METERING
UNIT
O
IDLE SPEED
ADJUSTMENT
SCREW
IDLE
MIXTURE
ADJUSTMENT
NUT
VIEW
OF
LEFT
SIDE
OF
THRO~E
BODY
AND
METERING
UNIT.
(PLUMBING,
INDUCTION
AIR
SYSTEM,
ETC. OMIT~D
FOR
CLARITY.)
5&282-7
Figure
6-6.
Idle
Adjustment
6-10
515