Cessna 150K - Throttle Control; Mixture Control

1
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7
1. Knob
5. Instrument Panel
2. Rigid Conduit
6.
Friction Lock
3. Flexible Conduit
7.
Jam Nut
4.
Staked Connection
Figure 11-8. Throttle Control
NOTE
Some
controls have intricate parts that will
fall out and possibly be lost if the control is
pulled from housing while the control is dis-
connected.
11-51. RIGGING. When adjusting any engine control,
it is important to check that the control slides smooth-
ly throughout its full range of travel, that it locks se-
curely if equipped with a locking device, and the arm
or lever which it operates moves through its full arc
of travel.
Whenever engine controls are being discon-
nected, pay particular attention to the exact
pOSition, size, and number of attaching
washers and spacers. Be sure to install
attaching parts as noted when connecting
controls.
11-52. THROTTLE CONTROL.
NOTE
Before rigging throttle control shown in figure
11-8, check that staked connection between
rigid conduit and flexible conduit is secure.
If any indication of looseness or breakage is
apparent, install new throttle control before
continuing rigging procedure.
11-22
Change 1
a. Pull throttle control out (idle position) and re-
move throttle control knob.
b. Screw jam nut all the way down (clockwise) and
install throttle knob. Screw knob securely against
the jam nut. Do not back jam nut out. This will pre-
vent bottoming and possible damage to the staked
connection.
c. Disconnect throttle control at the carburetor
throttle arm, push throttle control in until jam nut
contacts friction lock. While the friction lock is
loose, then pull control out approximately 1/8 inch
for cushion. Note position of larger washer at car-
buretor end of control. Install washer in same posi-
tion when connecting control to arm.
d. Tighten friction lock, being careful not to change
position of the throttle.
e. Move throttle arm on the carburetor to full open,
adjust rod end at end of throttle control to fit, and
connect to arm on carburetor.
f. Release friction lock and check full travel of arm
on carburetor. If further adjustment is required,
make all adjustments at the carburetor end of control.
DO NOT change jam nut setting.
g. Tighten rod end locknuts at carburetor end of
control. Be sure to maintain sufficient thread en-
gagement between rod end and control.
NOTE
Refer to the inspection chart in Section 2
for inspection and/or replacement inter-
val for the throttle control.
11-53. MIXTURE CONTROL.
a. Push mixture control full in (RICH), unlock then
pull it out approximately 1/8 inch for cushion.
b. Loosen clamp securing the control housing to the
engine.
c. Shift the control housing in the clamp so that the
mixture arm on the carburetor is in full open (RICH).
Tighten clamp in this position.
d. Unlock and pull mixture control full out. Check
that mixture arm on carburetor is full closed (IDLE
CUT-OFF).
e. Check that bolt and nut at the mixture Hm on the
carburetor secures the control wire and that the bolt
will swivel in the arm.
f. Bend control wire tip 90 degrees to prevent it
from being withdrawn if the attaching nut should
become loose.
g. When installing a new control assembly, it may
be necessary to shorten the wire and/or control
housing.
h. The mixture arm on the carburetor must contact
the stops in each direction, and the control should
have approximately 1/8 inch cushion when pushed full
in (RICH).
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NOTE
Refer to the inspection chart in Section 2
for inspection and/or replacement inter-
val for the mixture control.
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