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

DeSoto "S 10" — 1942 — No. EFI , $30.85
be 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 13/32".
Pump stroke adjustable for high or low temperature. Set to longest stroke for cold weather, shorter stroke for hot weather driving.
DASH-POT: Motors operating in connection with fluid couplings tend to stall under rapid decelerating conditions unless the throttle is made to close slowly. Slow throttle movement is necessary only the last part of the closing. The dash-pot or decelerating pump acts as a snubber to the throttle, allowing fast movement to almost closed position, then slow closing from that point to the idle position.
Dash-pot operation is as follows: As the throttle is opened linkage raises the plunger, filling the dash-pot cylinder with gasoline from the bowl. There is little or no resistance to the gasoline as the cylinder fills. However, when the throttle is released, the throttle valve closes rapidly until throttle arm contacts dash-pot plunger arm. Then the plunger must be pushed to the bottom of the cylinder before the throttle can close. A ball check located in the lower end of the plunger shaft, seals the large upper openings and the gasoline must leave the cylinder through the small metered hole in lower end of the shaft. This reduces the rate at which plunger can be forced to the bottom of the cylinder making the last part of throttle closing very slow. The adjusting screw (in top of bowl cover) should be opened five full turns from closed position for average conditions. Under extreme driving conditions greater openings may be necessary, al-though extreme dash-pot action will effect gear change and not enough action will cause engine to stall.
Be sure plunger leather is soft and pliable and effects a good seal against the cylinder wall.

*Gaskets so marked must be soaked in 90
Choker valve assembly_
Pump check passage plug----
Rivet plug ° ° -----°
Rivet plug ... (2)
Main vent tube rivet plug
Idle port rivet plug
Pump jet rivet plug
Choker lever (loose)
Choker lever and shaft assembly
*Main metering jet gasket
Needle seat gasket
*step-up jet gasket °----°----
Step-up piston gasket
!b7 Float and lever assembly 1.20
Float lever pin 07
Needle and seat assembly 1.20
Idle adjustment screw 45
Valve attaching screw (4) 2 for .07
Pump jet °----° 30
Idle adjustment screw spring 07
Step-up piston spring ° 07
Pump spring
-
Pump and dash-pot plunger spring (2) .15
Dash-pot adjustment screw spring 07
proof denatured alcohol for 15 minutes, installed on part, and let dry before using. NOTE: Small figures preceding list price indicate number of pieces used in one carbureter.
PART NAME Amount
Body flange assembly $3.70
Flange gasket—with governor 09
Flange gasket—without governor 09
Throttle valve
30
Throttle shaft and arm assembly 90
Throttle lever assembly 65
Throttle shaft dog ° 3..30
30
Air horn assembly -°--° °---
.75 .15 .04
.04 .04 .04 .07 .07 .65 .07 .07 .07
Prevailing Surcharge
Part No. PART NAME Amount
61-267 Dash-pot arm spring .15
63-24 Float lever pin retainer__ 07
07 63-37 Pump retainer ring

63-46 Pump spring retainer 07
64-60S Pump plunger and rod assembly 1.05
64-74S Dash-pot plunger and rod assembly 1.30
86-15 Flange stud lock washer (2) .02
101-141 Dash-pot adjustment screw 15
101-145S Flange screw and washer assembly (2)
101-146S Air horn screw and washer assembly (4)
101-163 Throttle adjusting screw
101-164 Throttle lever clamp screw
105A-13 Flange stud nut (2)
105A-28 Throttle lever clamp nut_
114-50 Throttle shaft arm (loose)
115-80 Choker connector rod
116.13 Pump cylinder ball
116-18 Pump check ball.--°
117-62 Pump operating link
Pump connector link
Dash-pot lifter link
Dash-pot connector link
Body flange gasket ..................: °--(2)
Body gasket -°---°-
Idle orifice tube and plug assembly
Main vent tube-
Step-up jet and gasket assembly
Dash-pot pin
Pin spring ---- _ -----------------° (2) .02
Main metering jet ass'y—2 sizes lean 45
Main metering jet ass'y—1 size lean 45
Main metering jet assembly—standard 45
Step-up piston, plate and rod assembly 60
Insulator
150A-13 159-63S 159-87S
159-89S 160-46S 183-17
117-70 117-103 117-104
121-38 121-90 123-31 S
145-13 149-56S 150-111
.07 .07 .07 .07
.07 .07 .15 .30 .04 .07 .20 .15 .15 .15 .07 .15 .45 .20 .35 .04
Copyright 1942
by Carter Carburetor Corporation
All rights reserved.