wrote in message
ps.com...

No, that's what I meant. On the Lycoming the left mag fires the
bottom left-side plugs and right top-side plugs. The RH mag fires the
top LH and bottom RH plugs. Continental's smaller engines have the
mags firing all the top or all the bottom plugs, and the larger
engines are arranged like Lycomings.


Haven't followed the whole thread, but on my Lycoming, the left mag fires
all top plugs (TIO540-AH1A).

San