ROCHESTER CARBURETORS

Bulletin 9C-301 1 April 1953

CHEVROLET-1932-52 Automatic Choke Carb. for 216 Cu. In. Engine CARBURETOR 7004620 - SERVICE PKC. 7005060
CARBURETOR ADJUSTMENTS, Cont'd.
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FIGURE 3
CHOKE ROD ADJUSTMENT
1.   With the stat cover properly indexed (so chat the scribed index mark on the cover is set 1 notch lean of the long cast mark on the choke housing) turn the idle screw in until it contacts the second step of the fast idle cam against the shoulder of the highest step. (Figure 3.)
2.  Holding the screw tightly against the cam, bend the choke rod at the dog leg until the small end of the combination gauge (.073") just slides easily between
FIGURE 4
UNLOADER ADJUSTMENT
With the throttle lever in the full wide open posi­tion, there should be a clearance between the lower edge of the choke valve and the bore of the carbu­retor air horn so that the large end of the combina­tion gauge (.166") will just slide freely (Figure 4). Bend the tang on the throttle lever to obtain the necessary clearance.
NOTE: No other carburetor adjustments are required.
the lower edge of the choke valve and the bore of the carburetor air horn.
Bending tool BT-18, float level gauge M-250. and combination carburetor gauge BT-64 are available from Borroughs Tool Company, Kalamazoo, Mich., U.S.A.
AUTOMATIC CHOKE STOVE ADAPTER KIT INSTALLATION
1.    Assemble carburetor to engine manifold. Connect the carbu­retor controls, gasoline and vacuum spark control lines.
2.   Mount manifold stove assembly on exhaust manifold between No. 1 and No. 2 exhaust ports so that hot air tube connection is offset slightly towards the rear of the engine (Figure 6). Do not tighten retainer screw securely until tube installation is made.
3.    Place tapered end of hot air tube into manifold stove connec­tion. Then by adjusting the position of the manifold stove on the exhaust manifold, assemble the tube fitting to the carburetor choke housing connection until it is ringer tight.
4.    After this assembly has been made, tighten the stove retainer screw and tube fitting securely.
5.   Install new clip 3700188 between throttle control rod and carburetor throttle lever.
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FIGURE 5

 

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