I doubt it if there any stats for failed starts but my impression, no more, is that they are more common than failures in flight.
That may well be so FL, but I don't read too many posts starting with...'T
here I was shut down in the middle of......' and ending with, '..
.and we had to get the engineers out to us.'
If when selecting '
RUN' the Gazelle didn't start, all we had to do was hit the starter gennie with a hammer like handy thing