https://youtu.be/u94WrtzP4dM?si=pIGDGg-RaYX9HUyg
Slide fast idle cam assembly onto choke shaft. Install choke shaft into air horn and revolve cam to allow piston to slide freely into cylinder. Then lock fast idle cam spring ends around nib of cam and projecting nib of choke shaft assembly. Install choke valve with trademark to top, seating valve before tightening screws. Valve must not bind in any position, but fall free of its own weight. Install fast idle link and choke trip lever. Place washer on choke connector rod assembly before attaching to fast idle link. Install spring and retainer.
Fast idle and unloader adjustments should be made at this point before the balance of climatic control is assembled. Install baffle plate and attaching screw. Install coil housing gasket. With choke wide open, hold coil housing with notch revolved one-quarter turn clockwise from index mark on housing. Place against housing and revolve adjusted correctly. Lock in place with screws and retainer.
Remove thermostatic coil housing, gasket, and baffle plate. Crack throttle valve, and hold choke valve fully closed, then close throttle. This will allow fast idle cam to revolve to fast idle postion (B). With choke valve held tightly closed and slight tention on throttle lever, loosen lock nut on choke connector rod assembly and turn sleeve until there is .054” (532S, 661S) clearance between throttle valve and bore of carburetor, side opposite idle port. Hold sleeve in position and secure lock nut.
This adjustment must be made after fast idle adjustment. Hold throttle valve in wide open position and close choke valve as far as posisble without forcing. There should be 3/16” clearance between lower edge of choke valve and inner wall of carburetor. Adjust by bending arm on choke trip lever (A).