FUEL—CARBURETION
21
IDLE PORT:
IDLE PORT OPENING:
LOWER PORT:
SET IDLE ADJUSTMENT SCREW:
MAIN NOZZLE:
METERING ROD:
METERING ROD JET:
ACCELERATING PUMP:
CHOKE:
VACUUM SPARK PORT:
(Upper) slot type. Primary, length .185"; width .030". Secondary, none.
Primary, .130" to .136" above top edge of valve with valve tightly closed.
Secondary, none.
Primary (for idle adjustment screw), size No. 53 (.0595") drill.
Secondary, none.
3/4 to 13/4 turns open. For richer mixture, turn screw out. Do not
idle engine below 425 RPM Automatic Trans. in Neutral (With Air
Conditioning "ON" 475 RPM) ; 550 RPM for Standard and Overdrive Trans.
Installed permanently. NO NOT REMOVE. Antipercolating jet,
primary size No. 70 (.028") drill, Secondary size No. 72 (.025") drill.
Primary economy step .074" diameter. Middle step tapers to .050" diameter.
Power step, .044" diameter. Secondary, none.
Primary size .098"; secondary size .070" diameter.
Discharge jet (Twin) primary side only, size No. 72 (.025") drill.
Intake ball check seat, size .115" to .120" diameter. Discharge
needle seat, size .070" diameter.
Carter Climatic ® Control set on index. Choke heat suction hole in piston
housing, No. 43 drill.
Horizontal slot .130" x .040". Top of port .040" to .046" above top edge of
tightly closed throttle valve.
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