1948-1952 Shop Service Manual - - Hudson-Essex-Terraplane Club

SECTION 4
FUEL SYSTEM & EXHAUST
CARBURETOR WA-1-749S
(1950 to '54, 232 en.)
ENGINE 4 - 1
SPECIFICATIONS:
Make
Type
Main Venturi
Primary Venturi
Flange Size
Secondary Venturi
Float Level
Idle Adjustment
Pump Plunger Travel from
Closed to Wide Open Throttle
Low Speed Jet Tube
Vents:
Gasoline Intake: .
Gas Line Connection:
Idle Port:
Idle Port Opening:
Idle Screw Seat
Main Nozzle:
Carter No.-12-2805: . E
Carter
Single Throat Down Draft
1-3/8" I.D.
11/32" I.D.
1-1/2"
11/16" I.D.
1/2"
1/2 to 1-1/2 turns open
16/64"
Jet size No. 65 (.035")
drill. By-pass, size 1.6
M.M. No. 63 drill.
Economizer, .0515" -
.0525" diameter. Idle
bleed, No. 52 (.0635")
drill.
Outside Only No. 10
drill.
Square vertical nee -
dle, Size No. 46 (.081")
drill hole in needle seat.
5/16" weatherhead
nipple.
Length .190", width
.040"
.136" to 140" above
valve with valve closed.
No. 46 drill.
Slip nozzle, flush type,
(angle tip) seats in
primary venturi at
45° angle.
Discharge jet size
.110" dia. Inner nozzle
(seats in slip nozzle)
I. D. No. 31 drill
(.120").
Metering Rod Jet
Metering Rod
Carter No.
75-704
75-712
75-713
75-714
Length of Taper (All)
Power Step
Standard
1st. Leaner
2nd. Leaner
3rd. Leaner
Length of Step
Metering Rod Setting:
Standard
1st. Leaner
2nd. Leaner
3rd. Leaner
.1015" diameter
(Vacumeter Type)
Economy Step
Use Gauge J-1265 Carter T-109-102
Accelerator Pump:
Pressure type with adjustable stroke.
Discharge jet, size No. 72 drill.
Intake ball check size No. 60 drill.
Discharge ball check No. 32 drill.
Relief passage (to outside) No. 42 drill.
.0745 to .066
.075 to .0675
.0755 to .069
.076 to .0705
.187
Diameter
.040
.043
.046
.049
.147"
Pump Adjustment - 16/64" plunger travel, (full throttle
position) short stroke.
Choke: Climatic control, set at index. Butterfly type, offset
valve. Choke heat suction hole, in body size No. 30 drill.
Anti-Percolator Valve:
Saxophone Key
Vacuum Spark Port: .054" - .057" diameter. Bottom of port
.020" above valve.