Cessna T188C - Electric Fuel Pump Circuit; Auxiliary Electric Fuel Pump Flow; Rate Adjustment; Induction Air System

MODEL 188
& T188 SERIES
SERVICE
MANUAL
ALL DIMENSIONS ARE INCHES
correct idle speed.
Engine idle speed may vary among different
engines.
An engine should idle smoothly,
11-44. ELECTRIC
FUEL PUMP CIRCUIT.
Refer
without excessive
vibration and
the idle speed
to Section 16.
should
be high enough
to maintain
idling
oil
pressure
and to preclude
any possibility
of
11-45. AUXILIARY
ELECTRIC
FUEL PUMP
FLOW
engine stoppage
in flight
when the throttle
is
RATE ADJUSTMENT.
Refer to Section
12.
closed.
11-46.
INDUCTION
AIR
SYSTEM.
b. Advance throttle to increase engine speed to
1000 rpm. NOTE
c. Pull
mixture control
knob slowly
and steadily
toward the idle cut-off position, observing tacho- Following instructions are applicable
meter, then return control full IN (RICH) position to aircraft serials thru 18800832.
before
engine stops.
Beginning with aircraft
serial
d. Adjust mixture adjusting
screw at upper end of
18801375 airbox
is nonremovable.
carburetor intake throat to obtain a slight and mo-
mentary gain of 50 rpm maximum at 1000 rpm en- 11-47. DESCRIPTION. Ram air enters the induc-
gine speed as mixture
control is moved from full
tion air system through
a filter at the front of the
IN (RICH) toward idle cut-off position. Return con- lowur cowling and is ducted to the airbox at the car-
trol to full IN (RICH)
to prevent engine stoppage.
buretor. A butterfly valve,
located in the airbox,
e. If mixture is
set too LEAN, engine speed
will may be operated
manually from the cockpit to per-
stop immediately, thus requiring a richer mixture. mit the selection of either cold or heated air. When
Turn
adjusting screw OUT (counterclockwise)
for a the induction
air door is closed, heated
air is drawn
richer mixture, from a shroud on the left exhaust stack assembly.
f.
If mixture is set
too RICH, engine
speed will
increase above 50 rpm, thus requiring a leaner 11-48. AIRBOX REMOVAL AND INSTALLATION.
mixture.
Turn adjusting screw IN
(clockwise) for a. Remove
lower engine cowling in accordance
with
a leaner mixture. paragraph 11-3.
Revision 1 11-17