With a four-banger, the pistons tend to stop halfway along the bores. That
would put
the front throw either up or down. That would mean that the prop stops in
the
vertical position when it's indexed this way. Correct?

It's actually about 45 degrees from vertical. A whole tie down row
happened to fill up with Skyhawks the other day. While walking to my plane,
I noticed that all the props were at the same angle. It looked like someone
had gone out and arranged them. Rather a pretty picture actually.

--
Roger Long