" wrote:

Have discussed this issue with Lycoming and TCM, also Hartzell and
McCauley. The prop people say that from a vibration standpoint, they
prefer to have a blade aligned with the front crankshaft "throw".

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?

George Patterson
If you don't tell lies, you never have to remember what you said.