The Ford Barn - View Single Post - Tillotson air balanced 1928-34 carb

Ruth · 07-10-2020, 05:58 PM

A friend installed a "new" air-balanced Zenith he got from one of the vendors. We couldn't figure out why it would not run unless the GAV was open 2+ turns and was real hard to start. Even with the GAV open that far, it ran real lean. Plugs were white.

Turns out this "new, made in USA" carb had excessive clearance in the throttle shaft, thus sucking in air. Might want to check your throttle shaft.

07-10-2020, 05:58 PM	#9
Ruth Senior Member Join Date: May 2016 Location: Glide, Oregon Posts: 1,336	Re: Tillotson air balanced 1928-34 carb A friend installed a "new" air-balanced Zenith he got from one of the vendors. We couldn't figure out why it would not run unless the GAV was open 2+ turns and was real hard to start. Even with the GAV open that far, it ran real lean. Plugs were white. Turns out this "new, made in USA" carb had excessive clearance in the throttle shaft, thus sucking in air. Might want to check your throttle shaft. __________________ Ruth "Sometimes you really DO need to read the whole thread" Last edited by Ruth; 07-10-2020 at 08:15 PM.