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seating tapered end in metering rod jet. Hold gauge vertical
to insure seating. With throttle valve seated, press down lightly on piston
link directly over piston. There should be less than .005" clearance
between metering rod pin and shoulder in notch of gauge. Gauge must not drag
on pin. Adjustment can be made by bending lip on piston link so that it contacts
pump arm. (Use tool T109-105.) Remove gauge and install metering rod and
disk. Connect metering rod and spring.
Anti-Percolator Adjustment: Crack throttle valve .020" by placing gauge
T109-29 between valve and bore of carburetor (side opposite port). Bend rocker
arm (use tool T109-105) until there is a clearance of .005" to .015" between
rocker arm and pump arm.
Fast Idle Adjustment: With fast idle cam held in normal idle position, tighten
throttle lever adjusting screw until it just seats against cam. Hold throttle
lever closed and pullcam back until first (or lower) step on cam is against
(not on) set screw.
There should now be %" clearance between inside wall of air horn and
lower edge of choke valve. (Use tool T109-85.) Adjustment can be made by
bending at offset portion of fast idle link. (Use tool T109-41.)
Unloader Adjustment: With throttle valve wide open there should be 38" clearance
between lower edge of choke valve and inner wall of air horn on 481S, and
7/16" on 504S. (Use tool T109-80 or T109-81.) Adjustment should be made
by bending cam on throttle lever. (Use tool T109-41.)
Lock-Out Adjustment: With throttle and choke valves wide open, choke should
lock in wide open position. Adjustment should be made by bending lip at lower
end of fast idle link to give 1/32" clearance between lip and throttle
lever lock, with throttle and choke valves held wide open. (Use tool T109-105.)
Oldsmobile 6—1941-42—Carburetor Nos. 481S-504S—List Price
$29.40
All Prices Subject to Prevailing Surcharge
WHEN SERVICING, USE GASKET ASSORTMENT No. 657—LIST PRICE $0.75 REPAIR
PACKAGE No. 1097, PRICE $5.65 PART NAMES IN BOLD TYPE, LISTED BELOW, INDICATE
CONTENTS OF REPAIR PACKAGE
art No. PART NAME List Price
1-341S Body flange assembly $5.50
1A-21 Flange gasket—11/2” S. A. E ___..07
2-106 Throttle valve 15
3-402S Throttle shaft and lever assembly 1.10
6-397S Air horn and climatic control assembly (481. S) 8.10
6-410S Air horn and piston housing assembly 2.95
6-411S Air horn and climatic control assembly (504S) 8.10
7-107 Choker valve 30
11-170S Low speed jet assembly 45
11B-41 Rivet plug 04
11B-42 Body flange rivet plug 04
11B-79 Rivet plug ....--'- (5) .04
11B-108 Idle port rivet plug 04
11B-117S Idle passage plug and gasket assembly 15
11B-119S Ball retainer plug and gasket assembly 15
11B-1275 Pump jet and nozzle passage plug and
gasket assembly (2) .15
11B-130 Nozzle retainer plug 15
12-280S Nozzle assembly 65
14-222S Choke piston lever, link and shaft assembly.._ .90
14-262S Choker lever, screw and link assembly 45
15-35S Strainer nut and gasket assembly 45
20-22 •Needle seat and plug gasket (3) 07
20-26 Metering rod jet and plug gasket (3) 07
20-35 Bowl strainer gasket 07
20-45 Nozzle gasket 07
21-76S Float and lever assembly 1 20
24-15 Float lever pin 07
25-75S Needle and seat assembly 1 20
30-14 Bowl strainer gauze 15
30-23 Piston housing strainer 20
30-35 Pump strainer 15
30A-39 Idle adjustment screw 45
39-10 Choke valve attaching screw (2) 2 for 07
39-11 Throttle valve attaching screw (2) 2 for 07
48-72 Pump jet 35
53A-161S Pump arm and countershaft ass'y (Sup. by
53A-247S) 75
Pump arm and countershaft assembly 75
Plunger spring 15
Adjustment screw spring 07
Pump spring 15
Metering rod spring 15
Connector rod spring 07
Vacuum piston spring 07
Rocker arm spring 15
Needle pull clip 07
Housing retainer (3) 04
Spring retainer 07Part No. PART NAME List Price
64-58S Plunger and rod assembly.._ .. 1.05
75.487 Metering rod-Standard (.07625"-.07625" to
.0715"-.0715" to .067"-.053") _ .45
75-512 Metering rod—1 size lean (.07725"-.07725" to
.07325"-.07325" to .068"-.057") 45
75-513 Metering rod—2 sizes lean (.078"-.078" to
.075"-.075" to .070"-.063") 45
75-514 Metering rod—3 sizes lean (.079"-.079" to
.077"-.077" to .0725"-.065") 45
86-15 Flange stud lock washer (2) 02
101-28 Throttle shaft arm clamp screw 07
101-65 Coil housing attaching screw (3) 2 for 07
101-78 Choker lever clamp screw 07
101-81 Fast idle cam screw 15
101-120 Throttle lever adjusting screw 07
101-143S Piston housing attaching screw and washer
assembly 07
101-148S Bowl cover attaching screw and washer
assembly °°° (5) .07
101-151S Air horn attaching screw and washer
assembly (2) .07
101-153S Body flange attaching screw and washer
assembly °- (2) .07
105A-13 Flange nut (2) .07
114-42S Throttle shaft arm and screw assembly 30
115-68 Throttle connector rod 35
116-13 Check ball (2) .04
117-58 Pump connector link 07
117-66S Piston link and spring assembly 35
118-28 Dust cover °- 75
120-15S Metering rod jet and gasket assembly 45
121-51 Air horn gasket 07
121-58 Bowl gasket --- 15
121-74 Coil housing gasket 07
121-82 Body flange gasket (upper) 15
121-83 Body flange gasket (lower) 15
129-15 Metering rod disk - .04
146-69 Bowl cover (Not sold separately) (Part of
146-88S) ....--.._. ._ 1.45
Bowl cover and strainer assembly 1 90
Piston pin -° ............ ............................ .04
Anti-percolator pin 04
Pin spring 02
Vacuum piston and pin assembly 45
Choke piston ............................................ .35
Thermostatic coil and housing ass'y (504S)__ 2.95
Thermostatic coil and housing ass'y (481S) -. 2.95
Fast idle cam and pin assembly ..: 30
Insulator 50
Anti-percolator cap and rocker arm assembly .35
53A-247S 61-23 61-57
61-63 61-75 61-128 61-175 61-188 61-192 63-33 63-35
146-88S 150-62 150-92 150A-10 160-67S 160-75 170F23S 170M23S 181-99S 183-28
184-18S
*Gaskets so marked must be soaked in 90 proof denatured alcohol for 15 minutes,
installed on part and let dry before using.
NOTE: Small figures preceding list prices indicate number of pieces used before
prices, only one is used.
in one carbureter. Where numbers do not appear
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