Carburetors for old Dodge Trucks : DODGE TRUCKS 1942Previous | Home | Next |
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Form 6492C—Canadian
DODGE TRUCKS, 1942
April, 1942
Reprinted February, 1945
DODGE TRUCKS
1942
ETTI, 183.
B-B DOWN-DRAFT CARBURETERS—MODELS DTC I , List Price $22.05; ETT I ,
List Price $29.40
A $3.75 exchange allowance on DTC1; $5.00 exchange allowance on ETT1
CARBURETER SPECIFICATIONS
DTC1 for Engine T112—3%" Bore, 4-1/16" Stroke.
IT116-T118E—3%" Bore, 4%/" Stroke. ETT1 for Engines T118G-T110K-T110L—3-7/16" Bore,
41/4" Stroke. T120-T120M—3-7/16" Bore, 41/2' Stroke.
DTC1 Used on "DD I "
ETTI Used on "DD2-3-4-5-6-7-7S"
STARTING MOTOR NUMBERS
DTC I —T 112 -4227C
ETT I —T 116 -2464C TI 18E -1491C TI 18G—5352C TI 10K —I
140C TI IOL —I469C T 120 -1739C TI 20M— I OO I C
Casting number
242;
on face
of flange: DTCI,
Dimensions: (Both) Flange size, 11 inch S. A. E. (DTC1) Throttle bore, 1-9/16
inch (39.69 mm). (ETT!) Throttle bore, 1-11/16 inch (42.86 mm).. (DTC1) Main
venturi, 11 inch (31.75 mm). (ETT!) Main venturi, 1-11/32 inch (34.13 mm).
Float Setting: (Both) Top of float 5/64 inch (1.98 mm) plus or minus 1/64 inch
(.397 mm) below top surface of carbureter body casting.
Vents: (Both) Outside; none. Inside, balance vent .218 inch (5.54 mm) diameter.
Gasoline Intake Needle: (Both) Triangular, horizontal. No. 44 (2.18 mm) drill
in needle seat.
Idle Orifice Tube: (DTC1) Jet size, .0295 inch (.76 mm). (ETT!) Jet size, .0276
inch (.70 mm).
(DTC1) Idle passage air bleed (in body) size .067 inch (1.70 mm).
(ETTI) Idle passage air bleed (in body) size .063 inch (1.60 mm).
(DTC1) Economizer (in body) size .054-.055 inch (1.371-1.397 mm).
(ETTI) Economizer (in body) size .053 inch (1.348 mm).
Idle Ports: (DTC1) Upper port, keyhole type; length, .160 inch (4.06 mm). Width,
.030 inch (.76 mm); .045 Inch (1.14 mm) diameter hole at top. Top of port located
.118 to .122 (3.00 to 3.10 mm) above top edge of valve.
(ETTI) Upper port, keyhole type; length, .128 inch (3.25 mm). Width, .027 inch
(.686 mm); .063 inch (1.6 mm) diameter hole at top. Top of port located .088
to .092 (2.24 to 2.34 mm) above top edge of valve.
(Both) Lower port size, .053 to .057 inch (1.35 to 1.45 mm) diameter. (For
idle adjustment screw.)
Set Idle Adjustment Screw: (Both) , to 11/y turns open. For richer mixture,
turn screw out. Do not idle engine below 300 r.p.m. or 6 m.p.h.
Main Metering Jet: (DTC1) Calibrated to flow 264 to 258 c( per minute.
(ETT1) Calibrated to flow 312 to 316 cc per minute. Do not gauge for size.
If in doubt, replace with new part. Main Vent: (Both) Through diffuser (air
bleed inside bowl) size, .0316 inch (.80 mm) drill.
Accelerating Jets: (DTC1) 2—.0354 (.90 mm) drill approximately 5/16 inch
(7.94 mm) from end.
2—.0854 (.90 mm) drill approximately 1 inch (25.40 mm) from end.
2-.0354 (.90 mm) drill approximately 11,41 inch (38.10 mm) from end.
(ETT1) 2—.0354 (.90 mm) drill approximately 5/16 inch (7.94 mm) from
end.
2—.0854 (.90 mm) drill approximately 1 inch (25.40 mm) from end.
Step-up Jet: (DTC1) No. 63 (.94 mm) drill.
(ETT1) .0413 inch (1.05 mm) drill.
Accelerating Pump: (Both) Type, delayed action. Stroke, summer setting (inner
hole, short stroke). Intermediate setting (center hole). Winter setting (outer,
hole, long stroke). Pump intake passage, ball check seat, size .115 to .120
inch (2.93 to 3.05 mm) diameter.
Pump discharge passage: Restriction (under ball check) size, 062 to .065 inch
(1.58 to 1.65 mm) diameter in body. (DTC1) Pump (discharge) jet, size .0276
inch (.70 mm) drill.
(ETTI) Pump (discharge) jet, size .0374 inch (.95 mm) drill.
Choke: Manual—Offset butterfly type, with pressure relief poppet valve.
Vacuum Spark Port: (Both) Slot type: size, .040 by .110 inch (1.016 by 2.794
mm).
(DTC1) Bottom of port to be .003 to .009 inch (.076 to .229 mm) above top edge
of valve.
(ETTI) Top of port to be .035 to .041 (.889 to 1.041 mm) above top edge of
valve.
Motor Tune-Up--Be Accurate! Always Use Feeler Gauges!
CAUTION: Change worn or leaky flange gaskets. Tighten rranifold bolts and test
compression before adjusting carburetor.
Spark Set
Plug Gap Breaker Points
.025" .020"
Ignition Timing
Breaker Points to Open:
DDI-2-3-4-5-6—T. D. C.
DD7-7S—2° or .002" A. T. D. C.
WHEN MOTOR IS AT OPERATING TEMPERATURE
VALVE CLEARANCE
Set Valves (Hot)
Intake .00B" Exhaust .012"
CARBURETER ADJUSTMENTS
Idle Adjustment
Screw Setting
I/2 to II/2 5/64 Inch Turns Open
-
Use Gauge
If carbureter loads up after considerable service, check float level. Wear
on lip of float lever will raise float level. Before adjusting float, be sure
float lever pin is firmly seated. Reset float level by bending lip of float
lever away from needle to raise level, or bend lip toward needle to lower float
level. Bend vertical lip of float only.
If motor stalls while idling, set throttle lever adjusting screw so motor runs
approximately 300 r. p. in. Then set
Idle adjustment screw to specifications. If these adjustments do not correct
the trouble, remove idle orifice tube and plug assembly. Clean tube and passages
with compressed air.
If acceleration is not satisfactory remove pump jet and clean with compressed
air. However, it is usually advisable to replace the pump jet, as its cost
is nominal. All jets must be seated gasoline tight. Poor acceleration may be
due to damaged or worn plunger leather in accelerating pump.
Copyright 1942