In article ,
"Morgans" wrote:

wrote

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.

How 'bout that. I misinterpreted what _you_ meant.

On my O-435 Lycoming the Right mag fires the top right and bottom left;
the Left mag fires top left and bottom right.

This arrangement is standard per Lycoming Overhaul manual for both 4-
qnd 6-cylinder engines.