DeSoto Carburetors for old Desoto's : DESOTO MODEL S10 SIMPLIMATIC TRANSMISSION 1942 Previous | Home | Next

Correct air fuel ratio is provided by a "balance tube" cast In the air horn. The balance tube should be checked each time the carbureter is serviced to see that the passage is open. The object of a balanced carbureter is to provide a constant air fuel ratio regardless of type, size or condition of air cleaner. Should the cleaner become clogged, the capacity will be reduced but `f. he air-fuel mixture ratio will not be changed.
Excessive richness above 50 miles per hour may be caused by a clogged main vent tube. After removal of rivet plug beneath float bowl with tool No. T109-42, main vent tube can he removed and a new tube inserted with tool No. T109-70.
Care must be exercised in inserting new tube which must seat tightly. Use new rivet to complete the installation.
Pump Adjustment: Remove air horn assembly, back out throttle adjustment screw, and place pump operating link in center hole of throttle shaft arm. Adjustment can be made by bending horizontal portion of pump connector link, so that top of pump plunger shaft contacts lip of indicator on pump stroke gauge T109-117S. Correct travel is 26/64”.
Pump stroke adjustable for high or low temperature. Set to longest stroke for cold weather, shorter stroke for hot weather driving.
DeSoto "S I O" — I942—No. EGI, $35.30 All Prices Subject to Prevailing Surcharge
GASKET ASSORTMENT No. 664, $0.50—REPAIR PACKAGE No. 1309. $5.20
PARTS NAMES WHICH APPEAR IN BOLD TYPE, ARE CONTAINED IN THE REPAIR PACKAGE
Part No. PART NAME List Price
1-401S Body flange assembly : $3 70
IA-24 Flange gasket—with governor 09
1A-31 Flange gasket—without governor 09
2-87 Throttle valve 30
3-451S Throttle shaft and arm assembly 90
4-429S Throttle lever assembly 65
4A-90 Throttle shaft dog 30
6-432S Air horn assembly 3 70
7-105S i'hoker valve assembly 75
11B-17 Pump check passage plug 15
11B-35 Rivet plug ...............................................---- .04
„11B-41 Rivet plug ------- .04
11B-79 Rivet plug ........ ...... ....(3) .04
11B-103 Main vent tube rivet plug 04
11B-108 Idle port rivet plug 04
11B-138 Pump jet rivet plug 07
14-282 Choker lever (loose) 07
14-284S Choker lever and shaft assembly 65
20-26 •1Ltin metering jet gasket 07
20-31 Needle seat gasket 07
20-51 *Step-tin jet gasket 07
20-52 Step-up piston and switch gasket (3) 07
20-81 Switch gasket 07
21-49S Float and lever assembly 1 20
24.23 Float lever pin 07
25-1028 Needle and seat assembly 1 20
30A-37 Idle adjustment screw 45
39-11 Valve attaching screw (4) 2 for 07
48-75 Pump jet 30
49-140S Valve plunger rod and plate assembly
(Sup. by 49-1.i8S) 45
49-158S Valve plunger rod and plate assembly 45
61-84 Idle adjustment screw spring 07
61-134 Step-up piston spring 07
61-146 Pump spring 15
61-157 Pump and dash-pot plunger spring (2) 15
61-251 Switch piston spring_ 15
61-254 Plunger operating spring 07
61-267 Dash-pot arm spring 15
61-269 Switch push rod sleeve spring 07
63-24
63-37 63-46 64-60S
PART NAME List Price
Flange stud lock washer (2) .02
Switch plate lock washer washer ................................. (4) .02
Switch contact lock washer 02
Terminal connector lock washer
Switch plate attaching screw (4) 2 for
Terminal connector screw
.......
Body flange screw and washer assembly (2)
Air horn screw and washer assembly (4)
Contact plate attaching screw 2 for
Electro magnet attaching screw
Throttle adjusting screw
Throttle lever clamp screw
Flange stud nut ............................................. (2)
Throttle lever clamp nut
Throttle shaft arm (loose)
Choker connector rod_
XPush rod assembly and sleeve spring unit
Pump cylinder ball_ --
Pump check ball
..
Pump operating link
Pump connector link
Dash-pot lifter link
Dash-pot connector link Body flange gasket
Carbureter body to insulator gasket
Body gasket ° ° ._ -- --------

orifice tube and plug assembly
Switch washer
Main vent tube
Step-up jet and gasket assembly
Dash-pot valve assembly
Dash-pot pin
Pin spring .....................................................(2)
Main metering jet assembly—2 sizes lean_
Main metering jet assembly—1 size lean
Main metering jet assembly—standard
Step-up piston, plate and rod assembly
Piston, contact plate washer and screw assy.
Terminal end plate
Push rod end plate
Cable clip -- -
Flange insulator
Float lever pin retainer 07 160-74S
Pump retainer ring 07 161-45
Pump spring retainer 07 161-46
Pump plunger and rod assembly (Identify 172-16
by Shaft No. 49-120) 1.05 183.30
Dash-pot plunger and rod assembly (Identify- 184-26 Terminal block .._ . 60
by Shaft No. 49-132) 1.30 213-11S Electro magnet and housing assembly 2.55
X 115-82U consists of 115-79S and 61-269, the entire step-down switch plunger assembly and spring.
'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 in parentheses preceding list price indicate number of pieces used in one carbureter. Where no figure is shown, only one is used.
Copyright 1942