Check your jets on rebuilt carbs

[christian]

Ever since I got my 160b running last fall I had a terrible issue with the idle. I had to have the idle adjust screw pretty much closed down all the way to get it to run at idle, and even then it had a lope that I just wasn't comfortable with. Since the plugs ran nice and tan and I had no issues with driving speed I just accepted it as being a quirk of an 82 year old car.

The carb I'm using is a rebuilt zenith from a reputable rebuilder whom claims all jets are flow tested, yet another reason I wrote off the lousy idle. While going through my junk box I found an old marred up originally numbered idle jet, on a whim I figured I would compare the two, I was astonished....

The nice shiny new idle jet that was supposedly flow tested was literally half the size in orifice diameter than the cruddy old numbered jet, I swapped them out for kicks and to my amazement, 1 and 3/4 turns out from stop the thing idles like a dream.

Check your jets !