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3-2
DESCRIPTION
ENGINE
FUEL AND EXHAUST SYSTEMS
(76)
d.
Stromberg
Ca r bur et or
Calibrations
IMPORTANT: Calibrations are identified by
the CODE NUMBER and not by model. num-
ber.
Carburetors of same model number but
different code
numbers
are not interchangeable.
3-2
DESCRIPTION
OF FUEL SYSTEM
a
. Ga soli ne Tank and Feed Pipes
The gasoline tank is made of two halves rib-
bon
-welded
together at the central flanges. Two
internal braces spot-welded to the upper half
on the centerline of tank at the support seats
act as struts to maintain the shape of tank and
prevent its flexing from the weight of gasoline
and pull of supporting straps.
The filler is securely soldered into an opening
in upper half of tank and is supported by an
upper and a lower brace soldered to filler and
tank. An external vent pipe soldered into the
highest point of tank and into the upper end
of the filler, and a groove formed in the upper
end of filler where the filler cap seats,
provide
a protected air vent for the
t
ank.
The gasoline tank is attached by two strap
type supports to the
body
under the
trunk
compartment, where it is seated against strips
of anti-squeak
material.
The rear feed pipe,
which is connected to the gasoline gauge tank
unit is supported by clips on t
he body.
The
rear feed pipe and the front feed pipe, which
is
connected
to the fuel
pump,
are
joined
by a
rubber hose which provides the flexibility re-
quired by movement of the engine on its rubber
mountings. Flared type fittings are used at all
other feed pipe connections.
b. Fuel
Pump and
Gas
oline
Filter
The
combination
fuel and vacuum pump is
mounted in the right side of crankcase at the
front end and is driven directly from the
en-
gine
camshaft.
The const r uction and operation
of
the
pump assembly
is des
cribed
in
Section
3-D
(par. 3-16) .
A gasoline filter is located at the gasoline
inlet of the carburetor for the purpose of re-
moving any dirt and water which may pass the
filter built into the fuel pump. The filter may be
a Carter ceramic type or an AC Paper-edge
type. Either type consists of a glass sediment
Choke Thermostat Setting .
.
..
"
1 Notch
Index
Lean
Drill Size for Checking Fast Idle
.'·'·
Ca m Se
tting
. .
. . . . . .
.
.
. .
.
.
.
.
#26
#26
'
l)iilJ.
Size for Checking Start Air
Lock and Loose Levers
. .
.
.
.
.
.
#53
#53
Drill Size for Checking Choke
Unloader Setting
+---#17
or
lJi4"~
NOTE : Use
production
main metering j
et
f
or
altitudes up to 3500 f
eet. Use high
altitude
jet for 3500 to 9000 f
eet. Above
9000 feet use
jet .002" smaller than spe
cified
for high alti-
tude.
.045"
.051"
.042"
.048'
#60
#54
#70
#70
.101"
.101 "
#70
#70
#42
#42
#70
#70
#60
#60
#54
#54
#68
#68
#60
#56
2-
#56
2-
#60
~"
Ys"
#58
#58
Main Discharge Jet
.
Main Metering Jet (see note below)
Production
.
High Altitude
.
Power By-pass
Jet
.
High Speed Bleeder
.
Float Needle Seat
.
Idle Air Bleeder
Main Body
.
Throttle Valve Body
.
Idle Tube Feed Hole
.
Idle Discharge Holes
Upper
.
Lower
.
Pump Discharge Nozzle Holes
.
P
um p Blow-off Hole
.
Holes in Throttle Valve
.
Pump Bottoming
.
Vacuum Spark Control Port
.
Model
AAV-167
AAV-267
Code Number. .
.
.
..
.
.
. . .
.
.
7-69
7-70
Size
.
.
.
. .
.
. ..
.
.
. ..
.
....
.
.
.
. .
..
1"
1
7:4
'
Throttle Diameter
.
. . .
. .
. .
.
.
. . .
1%
"
1
%
"
Primary Venturi Diameter
.
.
.
. .
.
1
~ "
1
Ys"
Float Bowl Fuel Level
+At bottom of sight
h
ole
•
#32-28
#32-28
Muffler , T
ype
+-straight Thru
Resonance-c-c--s-
Muffler,
1948, Diam. x Length
+-5%"
x 37
%"----+
Muffler, 1949, Diam. x Length
+ -
5"
x
43Ys"------+
c. Carter Car buret or and Choke Calibrations
IMPORTANT
: Calibrations are
iden ti fied by
the CODE NUMBER and not by model number.
Carburetors
of
same model number
but
differ-
ent code numbers
are
not
interchangeable.
M
odel
.
;
.
. .
.
. .
.
.
.
. .
.
.
.
.
. .
.
. .
.
.
WCD
WCD
Code Number
. .
. .
. . .
.
.
.
.
.
.
. . .
.
663S
6648
Size
. . . .
.
1"
1
7:4 "
Large
Venturi
Diameter
.
.
.
..
.
.
.
1
~ "
1% "
Float Bowl
Fuel
Level
+At bottom of sight
h o l e .
Float
Setting
~%!",
Cover to Floats-
Metering Rod Jet
.
. . .
.
. .
.
.
.
. .
. .
.082"
.082"
Metering
Rod,
(see note below)
Production
. .
.
.
. .
.
.
.
. . . . .
. .
.
.
75-614
75-615
High Altitude
.
.
.
.
. .
. . .
.
.
.
.
.
.
75-634
75-636
Low Speed Jet
. . . .
. . . .
.
.
.
.
. .
.
.
.
#65
#65
By-pass.
.
. .
. . .
. .
.
.
.
. .
. .
.
. . . . .
.049"
.051"
Economizer
.
.
. .
.
. .
.
.
.
.
.
.
.
. .
.
.
.
#65
#60
Idle Bleed
.
.
.
.
.
.
.
. .
.
.
. . .
.
.
.
.
.
.
.049"
.051"
Idle Discharge Port
030
"x.100·
.030"x.125·
Idle Adjustment.Screw Port
. . .
. .
.0655'
.0655'
Float Needle Seat
. .
.
.
.
.
.
.
.
.
.
.
. .
#42
#38
Pump Jet
.
.
.
.
.
.
.
. .
. . .
.
. .
. . .
.
. .
#71
#72
Pump Strokes
.
.
.
.
. .
. . . .
. .
. .
.
. .
2Ji4'
2Ji4"
Pump Spring
.
.
.
.
. .
. .
.
. . .
.
.
. .
.
.
#61-171
#61-171
Pump Plunger Spring
. .
. .
. .
.
.
. .
.
#61-328
#61-328
Vacuum Spark Control Port
. . .
.
.
.040"
.040 "
Choke Thermostat Setting
.
.
.
.
. .
Index
Index
Choke Suction Hole
. .
.
. .
.
.
.
.
.
.
.
#45
#36
Fast Idle Setting, Throttle Valve
to Barrel, Wall
, .
.
.
.015"
.018"
Choke
Unloader
Setting, Edge of
Valve to Air Horn
.
.
.
.
.
.
. . . .
.
U6"
%
'
NOTE:
Use production
metering rods for
altitudes up to 3500 f
eet.
Use high altitude
metering rods for
altitudes
above 3500 f
eet.
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