Piper Cherokee Six - Page 416

PIPER
CHEROKEE
SIX
SERVICE
MANUAL
A959
5
and
apply
SLIPMARK
with
Torque
Paint.
(Refer
to
Piper
Service
Bulletin
No.
53-7)
2
1.
THROTTLE
ARM
2.
IDLE
SPEED
ADJUSTMENT
3.
IDLE
MIXTURE
ADJUSTMENT
4.
FUEL
SCREEN
5.
MIXTURE
ARM
6.
THROTTLE
CONTROL
CABLE
7. NUT
M520365-1032C
Figure
7A-6.
Fuel
Injector
7A-20.
ADJUSTMENT
OF
IDLE
SPEED
AND
MIXTURE.
a.
Start
the
engine
and
warm
up
in
the
usual
manner
until
oil
and
cylinder
head
temperatures
are
normal.
The
electric
fuel
pump
must
be
"ON"
for
b,
c,
d
and
e
below.
b.
Check
magnetos.
If
the
"mag-drop"
is
normal,
proceed
with
idle
adjustment.
c.
Set
throttle
stop
screw
so
that
the
engine
idles
at
550-600
RPM.
If
the
RPM
changes
appreciably
after
making
the
mixture
adjustment
during
the
succeeding
steps,
readjust
the
idle
speed
to
the
desired
RPM.
d.
When
the
idling
speed
has
been
stabilized,
move
the
cockpit
mixture
control
lever
with
a
smooth,
steady
pull
toward
the
"Idle-Cut-Off"
position
and
observe
the
tachometer
for
any
change
during
the
leaning
process.
Caution
must
be
ex-
ercised
to
return
the
mixture
control
to
the
"Full
Rich"
position
before
the
RPM
can
drop
to
a
point
where
the
engine
cuts
out.
An
increase
of
more
than
50
RPM
while
"leaning
out"
indicates
an
excessively
rich
idle
mixture.
An
immediate
decrease
in
RPM
(if
not
preceded
by
a
momentary
increase)
indicates
the
idle
mixture
is
too
lean.
Revised:
7/29/77
POWER
PLANT
2G20