I know of one case in which the gascolator drain was touching the cowling in such a way that when the cowling vibrated, it opened the gascolator reducing fuel flow
so on preflight, check the gascolator valve (near nose where you drain fuel)
good one dave wilson.
they gave the mercury astronauts a small hammer just before launch and if something did not work they could give it a whack. they all made it.
so I give you a round of body percussion.
(clapping)