Chevrolet 1977 light duty truck, Service Manual

Page: 567 / 861

N O T E *: A N G L E G A U G E M E T H O D CAN ALSO BE USED
14
( T ^
g a u g e b e t w e e n
U P P E R E D G E O F
C H O K E V A L V E A N D
A I R H O R N W A L L
(S E E N O T E * )
o
O N W A R M E N G I N E , C L O S E C H O K E
V A L V E B Y P U S H IN G U P O N T A N G O N
I N T E R M E D I A T E C H O K E L E V E R ( H O L D IN
P O S I T I O N W IT H R U B B E R B A N D )
®
B E N D T A N G
T O A D J U S T
( ^ J H O L D T H R O T T L E
V A L V E S W I D E O P E N
1
I
CH EC K IN D E X M A R K
P O S IT IO N (STEP 11
OR 12)
UNLOADER ADJUSTMENT — M4MC/M4ME
CARB. NO.
PLUG
G A UG E
17057221
17057209
17057512
17057517
ALL OTHERS
.325
.240
.280
A N G L E
G AUG E
4 6 °
40°
42c
15
( 3 ) G A U G E B E T W E E N A IR
H O R N W A L L A N D
U P P E R E D G E OF
C H O K E V A L V E
(SEE N O TE *)
UNLOADER ADJUSTMENT — 4MV
CARB. NO.
PLUG
GAUGE
ANGLE
GAUGE
17057213
17057215
17057216
17057529
17057229
.205
40°
17057525
17057514
.225
4 3
=
1 7 056212
17056217
7 0 4 5 5 8 3
7 0 4 5 5 8 5
704 5 5 8 6
.295
16
C H O K E V A L V E
P U S H D O W N
O N T A I L O F
| C A M
£ j/\
( S T E P 2)
C H O K E V A L V E
C L O S E D
B E N D P IN
T O A D J U S T 0 1 5 M A X
C L E A R A N C E
S E C O N D A R Y L O C K O U T L E V E R
( 7 ) S ID E C L E A R A N C E
H O L D C H O K E V A L V E W ID E
O P E N B Y P U S H IN G D O W N O N
T A IL O F F A S T ID L E C A M
C H E C K L O C K O U T P IN
F O R C L E A R A N C E
^ G A U G E
F IL E E N D O F P IN
FO R C L E A R A N C E
(C H E C K FO R N O
B U R R S A FTE R
F IL IN G )
S E C O N D A R Y L O C K O U T
( J )
O P E N IN G C L E A R A N C E
S E C O N D A R Y L O C K O U T A D J U S T M E N T
CARB. NO.
PLUG
GAUGE
ALL
. 0 1 5 "