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Form 6585—Canadian FRAZER MANHATTAN 685S-685SA
CARTER CARBURETOR CORPORATION, ST. LOUIS, MO., U. S. A. August, 1948
MOTOR NUMBER
M 1001 and higher
FRAZER MANHATTAN
SIX
MODEL "F-486"
1948
(6855 Superseded by 685SA
Casting No. 550 on Face of Flange
WCD Dual Down-Draft Climatic Control Carbureter—Models 685S-685SA—List
Price $50.95
A $10.00 exchange allowance is deducted from the list price if buyer
turns in old carbureter.
CARBURETER SPECIFICATIONS
For Frazer 6 Cylinder Engine: 3-5/16 Inch Bore, 43/8 Inch Stroke
Dimensions: Flange size, 11/4 inch dual, 4 bolt type. Primary venturi,
11/32 inch I. D.
Secondary venturi, 19/32 inch I. D.
Main venturi, 1-3/16 inch I. D.
Float Level: Distance from seam of float (both sides—at top center)
to lower edge of bowl cover, when needle is seated to be 9/64 inch (685S),
1/16 inch (685SA). Use gauge No. T109-160 (685S), No. T109-197 (685SA).
Vents: Inside, none. Outside, 2—size No. 12 (.189) inch drill holes.
Gasoline Intake: Square vertical (spring loaded) needle. Size No. 42 drill
in needle seat.
Gas Line Connection: 5/ 16 inch Weatherhead connection.
Low Speed Jet Tube: Jet size, No. 66 drill (.033) inch. By-pass, size No.
56 drill (.0465) inch.
Economizer, size No. 63 drill (.037) inch.
Idle bleed, size No. 55 drill (.052) inch.
Idle Ports: Upper port, length .165 inch. Width, .030 inch.
Idle Port Opening: .122 to .128 inch above upper edge of valve with valve
closed tight.
Lower Port (For Idle Adjustment Screw): Size .0615 to .0655 inch diameter.
Set Idle Adjustment Screw: I to 11/2 turns open. For richer
mixture turn screw out. Do not attempt to idle engine below 8 m.p.h.
Main Nozzle: In primary venturi, closed tip angle 49° from horizontal.
Nozzle is installed permanently. Do not remove.
Metering Rod (Vacumeter Type): Economy step .0645 inch diameter. Middle step
tapers to .0545 inch diameter. Power step .042 inch diameter. Length 3-41/64
inches.
Metering Rod Jet: 2.15 mm (.0846 inch) diameter.
Metering Rod Setting: Use gauge, part No. T109-163 (2.940 inches).
Accelerating Pump: High pressure delayed action type. Adjustable stroke.
Discharge jet (twin) size, No. 74 drill (.0225) inch. Intake disk check size,
No. 30 drill (.1285) inch.
Discharge (needle seat) size, No. 55 drill (.052) inch.
Pump Adjustment: "29" as indicated on gauge T109-I17S with throttle
valve seated and pump connector link in lower hole (short stroke).
Choke: Carter Climatic Control, set on index. Offset butterfly
type. Choke heat suction hole, in bowl cover, No. 32 drill.
Vacuum Spark Port: .062 to .064 inch diameter. Top of port .033 to .038 inch
above valve.
Motor Tune-Up—Be Accurate! Always Use Feeler Gauges!
CAUTION: Change worn or leaky flange gaskets. Tighten manifold bolts and
test compression before adjusting carbureter.
F~ _
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111, -
Spark Plug
Gap
.032"
Breaker Point
Setting
.020"
Ignition Timing
Breaker Points to Open:
T. D. C.
Valve Setting
(Cold)
Int. .014" Exh. .014"
Float Setting
(Use Gauge)
9/64 Inch (685S)
1/16 Inch (685SA)
Idle Adjustment
Screw Setting
I to 11/2
Turns Open
Copyright 1948
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