Spark when starting a warm car?

[Ian Curtis]

Last night I was perusing my copy of the Service Bulletins, and noticed in the January '28 Bulletin it says:

1928 Ford Service Bulletin for January
Warm Engine Starting
With spark control lever about half way down quadrant and throttle lever advanced two or three notches, turn on ignition and depress starter switch. It is usually unnecessary to use choker when the engine is warm.

I had always been under the impression that you should always retard the spark when starting the car. The 1930 owner's manual hosted online as .pdf doesn't mention a special spark position for starting a warm engine.

Does the heat in the block of a warm engine guarantee that combustion will start earlier and the engine won't kick back?

http://www.motormayhem.net/wp-upload...ion-Manual.pdf