I know that hot starting IO-540s is a subject for considerable debate. I
was taught a method that I was told worked 100% of the time[1], and up
until yesterday it had. But yesterday, after flying for an hour and then
sitting in the hot sun for half an hour waiting for customs, I couldn't
restart the Lance and had to have it towed back to the tie down area.

So what would you do in that situation?

[1] Leave the throttle, mixture and prop alone from when you shut down.
Turn on the fuel pump, and crank. When it catches, quickly advance the
mixture to full, and once it stops spluttering lean it out.

--
Paul Tomblin http://blog.xcski.com/
"Zero Tolerance" in this case meaning "We're too stupid to be able to
apply conscious thought on a case-by-case basis".
-- Mike Sphar