Hudson 1948 - 1952, Service Manual

Page: 101 / 333

COPYRIGHT 1950 BY CARTER CARBURETOR CORPORATION. ALL RIGHTS RESERVED .
FUEL SYSTEM & EXHAUST 4 - 17
2. With metering rods bottoming, revolve metering arm
(K) until lip (H) (See insert) contacts vacumeter link (I).
Hold arm (K) towards connector link side and carefully
tighten the metering rod arm set screw (J).
FAST IDLE ADJUSTMENT:
1. With the thermostatic coil housing, gasket an d baffle
plate removed, open throttle valve (F) Figure 51, and
hold choke valve closed by holding down on choke lever
(L).
FIGURE 51
2. Then close throttle. There should now be .026" clearance
(use gauge KMO-658, T-109-189) between the throttle
valve and bore of carburetor (side opposite idle port).
Adjust by bending the choke connector rod at lower
angle (M).
UNLOADER ADJUSTMENT:
This adjustment must be made after making the fast idle
adjustment.
1. Hold the throttle valve wide open and close the choke
valve as far as possible without forcing.
2. Check clearance between upper edge of choke valve and
inner wall of air horn; this should be 1/8" (use Tool
J-818-5), Figure 52.
FIGURE 52
3. If adjustment is necessary, bend arm (N) on choke trip
lever. Use Tool KMO-478 (T-109-187).
IDLE ADJUSTMENT:
1. With carburetor Installed on engine, start engine and
allow engine to warm up.
2. See that choke valve is wide open.
3. Set idle adjustment screws to obtain smooth idle at 540 to
560 RPM. (If car is equipped with the Hydra-Matic
Transmission, set idle at 490 to 510 RPM.
4. On eight cylinder engines the normal screw setting is 1
to 1-1/2 turns open on six cylinder engines 1/2 t o 1-1/2
turns open.
WGD CARBURETOR
REMOVAL:
1. Remove the air cleaner. Loosen clamp at carburetor air
horn.
2. Disconnect throttle linkage at carburetor.
3. Disconnect fuel line from carburetor to fuel pump