154 EMISSION CONTROLS AND FUEL SYSTEM
1. Bowl cover assembly
2. Screw
3. Piston cover plate
4. Power piston
5. Spring
6. Metering rod
7. Pump link
8. Pump lever
9. Pump lever pivot screw
10. Screw
11. Choke shaft outer lever
12. Washer (spacer)
13. Choke shaft kick lever
14. Fuel inlet fitting
AFB bowl cover parts
15. Cover gasket
16. Pump plunger assembly
17. Float needle seat
18. Float needle
19. Float hinge
20. Float
to determine if it is parallel with the outer
edge of the air horn. Bend to adjust. The float
level is adjusted with the air horn inverted
and the air horn gasket in place. Clearance
between each float (at the outer end) and the
air horn gasket should be
5
/ie in. Bend to ad-
just.
The float drop is adjusted by holding the
air horn in the upright position and bending
the float arm until the vertical distance from
the air horn gasket to the outer end of each
float measures % in.
INTERMEDIATE CHOKE ROD
ADJUSTMENT
The intermediate choke rod adjustment be-
gins with the removal of the choke coil hous-
ing assembly, gasket and baffle plate. Posi-
tion a 0.026 in. wire gauge between the
bottom of the slot in the piston and the top of
the slot in the choke piston housing. Close
the choke piston against the gauge and se-
cure it with a rubber band. Now bend the
intermediate choke rod so that the distance
between the top edge of the choke valve and
the air horn divider measures 0.070 in.
ACCELERATOR PUMP ADJUSTMENT
The first step in adjusting the accelerator
pump is to push aside the fast-idle cam and
seat the throttle valves firmly. Bend the pump
rod at the lower angle to obtain a Vk in. mea-
surement between the air horn and the top
of the plunger shaft.
UNLOADER, CLOSING SHOE, AND
SECONDARY THROTTLE ADJUSTMENT
To adjust the unloader, hold the throttle wide
open and bend the unloader tang to obtain a
3
/ie in. clearance between the upper edge of
the choke valve and inner wall of the air horn.
10
AFB float drop adjustment
