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>I have about 225 hours on my ES with the IO550-G TCM engine. Cold starting
is no problem. Hot starting can be--especially in hot weather. Most
problems occur in the 15-60 minute time range after shut down (such as fuel
stop on cross country flight).<

Jim;
I remember hearing a long time ago about temperature doing something to a
magneto, and until it cooled down, it would not fire.  I'm not familiar with
the actual mechanics of the magneto but if memory serves me correctly,
something expanded/tightened on the shaft and would not permit contacts to
open/close or whatever.  Seemed that something was binding while hot.
Wasn't a problem while flying because of cooling air but more of a problem
during the 'heat soak' period after shut down and no cooling air.  When I
had my Duke, I had one engine that would light up at first crank no matter
how hot it was.  The other would sometimes take 15 - 20 minutes (after it
had been shut down for ~ 20 minutes) before I could get a single ignition
fire, and with that single fire it would start and run smoothly as if it was
the first start-up of the day.

Gary Rodgers



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