Re: Hard Starting when warm on a 1940 120 Convertable

Posted by Owen_Dyneto On 2012/5/17 13:30:02

Easy enough to eliminate the timing question, just set the timing. Might be ignition; failing condensors (and coils too for that matter) tend to show failure when hot, and seem OK when cooler.

But I'd guess it's flooding. What happens in you engage the choke unloader while trying to start? First I'd suspect either a improperly set antipercolator valve if your carb uses that, or if not then perhaps a clogged fuel bowl vent. After that my primary candidates would be leaking needle and seat, too high a fuel level in the bowl, or a defective (sunken) float - though all of these would show symptoms of a rich mixture during ordinary driving (sooty plugs, sooty tail pipe). Why not pull a spark plug and look for telltake signs, or show us a picture?