On Mar 4, 12:53 am, Jackal24 wrote:
"Travis Marlatte" wrote . net:

What is more important to me is that the left
key position has the bottom plugs firing. That's important so that I
can pull the correct plugs the first time to clear an unusually
stubborn fouling.

I thought that one mag controlled the top plugs on one side and the bottom
on the other side.

Yup, on Lycoming. Continental, at least on the smaller engines,
will have the right mag firing the top plugs and the left firing the
bottom. The impulse mag (right) fires the top plugs, since they're
less likely to get wet with oil or fuel.

Dan