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Form 6525—Canadian
BUICK 6085 March, 1946
Form 6525 Canadian—Carbureter 608S-Buick.
Part No. 115-67 throttle connector rod must be installed with pin spring
grooveci to top, spring and retainer to bottom.
BUICK
SERIES "50"
1946
Casting No. 324 on face of flange
WCD DOWNDRAFT CARBURETER No. 6085—LIST PRICE $44.10
A $10.00 exchange allowance is deducted from the list price if buyer turns
in old carbureter.
CARBURETER SPECIFICATIONS
608S for Buick Eight Cylinder Engine:
Dimensions: Flange size, I inch dual, 3 bolt type. Primary venturi, 11/32
inch I. D.
Secondary venturi, 21/32 inch I. D.
Main venturi, I-I/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 3/ 16 inch. (Use
gauge No. T109-162.)
Fuel level to be 1/32 inch above or below bottom of fuel level sight
hole.
Vents: (Early Production) Outside, two (to fuel chamber), 1/4 inch diameter,
on left side. No. 47 drill on right side. Inside: None.
(Late Production) In eir horn. Outside, No. 12 drill—2 holes.
Inside, none.
Gasoline Intake: Square vertical needle. Size No. 42 drill hole in needle
seat.
Gas Line Connection: 5/ 16 inch Weatherhead.
Low Speed Jet Tube: Jet size, No. 65 drill. By pass, size 1.25 mm (.0492")
Dr.
Economizer, size No. 65 drill.
Idle bleed, size 1.25 mm (.0492") Dr.
Idle Ports: Upper port, slot type, length, .100 inch. Width, .030 inch.
Idle Port Opening: .067 to .073 inch above upper edge of valve with valve
closed tight.
3-3/32-Inch Bore, 41/g-Inch Stroke
Lower Port (For Idle Adjustment Screw): Size, .0615 to .0655 inch diameter.
Set Idle Adjustment Screw: I/2 to I turn open. For richer mixture
turn screw out. Do not attempt to idle engine below 7 m.p.h. Main Nozzle:
In primary venturi, closed tip angle 40° from hori-
zontal. Nozzle is installed permanently. Do not remove.
Metering Rod (Vacumeter Type): Economy step, .0655 inch diameter. Middle
step tapers to .060 inch diameter. Power step
.057 inch diameter. Length 3-9/64 inches. (This rod is designed
with idle stabilizing flat on economy step.) (2.440
Metering Rod Jet: .082 inch diameter.
Metering Rod Setting: Use gauge. part No. T109-152
inches). (spring
Accelerating Pump: High pressure delayed action type
operated plunger).
Discharge jet (twin) size, No. 71 drill.
Intake ball check size, No. 32 drill. -
Discharge (needle seat) size, No. 50 drill.
Pump Adjustment: 21/64 inch plunger travel (full throttle position).
Use gauge No. T109-117S.
Choke: Carter Climatic Control, set at index. Butterfly type, off-set
valve. Choke heat suction hole, in bowl cover, size No. 45 (.082 inch)
drill.
Vacuum Spark Port: .039 to .041 inch diameter. Bottom of port .046 to
.050 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 carburetor.
Set
Breaker Points
.016"
Copyright 1946
by (Darter Carburetor Corporation All Rights Reserved
Use Timing Light
Breaker Points to Open
4° B. T. D. C.
Idle Adjustment Screw Setting
to I
Turn Open
Set Valves Hot Correct Float Level
Int. & Exh. .015" 3/16-Inch
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