Chevrolet 10 1971 Series Chassis Service Manual page 230

ENGINE FUEL 6M-8
Fig. H5— Accelerator Pump Override Adjustment
2. With parking brake on, and transmission in neutral,
start the engine and allow it to idle.
3. With the car on a level surface, the fuel level should
be on a level with the threads at the bottom of the
sight plug port (plus or minus 1/32 inch).
No float drop adjustment is required
NOTE:
on this carburetor.
4. If necessary to adjust (either or both bowls), loosen
inlet needle lock screw and turn the adjusting nut
Fig. H 6— Fast Idle Cam Adjustment (M echanical)
Fig. H7— Secondary Throttle Valve Stop Screw Adjustment
clockwise to lower or counterclockwise to raise fuel
level, then tighten lock screw.
1/6 turn of adjusting nut equals ap­
NOTE:
proximately 1/16" fuel level change.
5. Allow a minute for fuel level to stabilize, and re­
check the level at sight plug.
6. Readjust, if necessary until proper level is obtained,
and install sight plug and air cleaner.
To assure proper secondary float level
NOTE:
setting it is advisable to accelerate primary
throttles slightly and hand operate secondary
throttle. This assures a stabilized secondary
fuel level.
CHOKE COIL ROD ADJUSTMENT (Fig. H9)
1. Hold choke valve open.
Fig. H 8 — W et Fuel Level Adjustment
STOP SCR EW
10-30 CHEVROLET TRUCK SERVICE MANUAL