"Peter Dohm" wrote in message
...
I am sure that there are airplanes still in service that have engine(s)
with
impulse coupling one only one of two magnetos; but I doubt the wisdom due
to
liability and real risk of injury.

If you are not sure, or believe that your particular engine has impulse
coupling
on only one magneto; then DON'T EVEN THINK ABOUT HAND STARTING IT!

My plane ony has the impulse coupling on one mag. You don't start it on
BOTH,
you start it on the left mag, like the Cherokee 140 I used to fly. When the
engine
is running, you switch to both.

Paul