IO,
the aircraft in question was a Mooney 231. A Moneypit would be a better name.
The way to get the air out of the fuelline is to use the fuel drain and switch tanks while draining, not something you would do in the air.
My friend tried to restart the engine with the starter, 100ft above the runway and dropping. The priority should be to make a forced landing on the remaining runway, push nose down, lower gear and flaps if time permits and leave the engine alone.