Metering Rod

Fig. 5 Metering rod adjustment:

1. Back out the idle speed adjusting screw until the throttle plate is closed tight in the throttle bore.
2. Press down on upper end of diaphragm shaft until diaphragm bottoms in vacuum chamber. Metering rod should contact bottom of metering rod well, and metering rod should contact lifter link at the outer end, nearest the springs and at supporting lug.
3. For models not equipped with metering rod adjusting screw, adjust by bending lip of metering rod arm to which metering rod is attached, up or down as required.
4. For models equipped with a metering rod adjusting screw, turn the adjusting screw until metering rod just bottoms in the body casting, Fig. 5.
5. For final adjustment turn metering rod adjusting screw in (clockwise) one additional turn.