GAV Question

[Patrick L.]

Originally Posted by jayvee34

I am somewhat confused. My car starts @ 1/4 turn open, idles perfect. Will not
run past 10 MPH. Have to open gav to 1 1/2 turns, car runs up to 35 MPH,
open gav to 2 1/2 turns, car runs perfect up to 55 MPH, runs cool (160 degrees). I can leave gav @ 2 1/2 turns will slowing down or even stop and
start again. Turn ignition off. Turn ignition back on touch starter, instantly starts.
When on line and found this:ZENITH CARBURETOR ADJUSTMENT
Turn idle adjusting needle in lightly against its seat, then back out needle l 1/2 turns
as a preliminary adjustment.
With throttle held in closed position, turn throttle stop screw in until stop screw just
contacts throttle stop and then turn stop screw in 1 1/2 additional turns as a
preliminary idle speed setting
Set main jet adjusting needle at 4 1/2 full turns open.
Start engine and let it run a few minutes until warm enough for final adjustments. Set
the throttle stop screw for the desired idling speed.

Set the idle adjusting needle for smooth idling. Turning the needle in (clockwise)
reduces air and makes the mixture richer, while turning it out (counter clockwise) admits
more air into the mixture making it leaner (avoid using a mixture that is too lean).
To set the main jet adjustment, hold the throttle open so that the engine is running at
about 1/2 its normal operating speed. Turn the adjusting needle toward its seat until it
causes the engine to give evidence of a lean mixture by running irregularly. Then turn
the needle away from its seat, carefully counting the turns made until the engine shows a
trace of rich mixture. Set the adjustment. Then at just about halfway between the lean
point and the rich point, hold the adjustment at this point and tighten the packing nut
so there is no leakage of fuel around the adjusting needle.
Note: Check the fuel line connections so there is no leakage.
Look at magneto points and make sure they are not pitted and are adjusted to the proper
gap (.020" if Fairbanks Morse - .014" to .016" if Edison Splitdorf). Check spark plug to
make sure it is clean and properly gapped at .027".

Not sure what those adjustments are for, but, they aren't for our stuff. Especially the last paragraph.