Ignition switch settings

"Jon Woellhaf" wrote in message
...
And I've been trying to learn for years why R is on the left and L is on
the right.


My recollection from the last time this was discussed is that the labeles
used to be the other way around so that "L" on the left meant that the left
mag was grounded and, therefore, the right mag was firing. Then, to keep it
more consistent with the "Off" and "Both" labeling, they switched the
labeling but left the right key position which grounded the right mag so
that the left mag was firing now labeled "L"?

Doesn't bother me a bit. If one mag fails an RPM drop, I'm gonna check the
wiring to both any. 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.

Say, why don't they label them "Off", "B", "T", and "Both"?
-------------------------------
Travis
Lake N3094P
PWK

"Travis Marlatte" wrote

Say, why don't they label them "Off", "B", "T", and "Both"?

Excellent suggestion! Why not? It might make too much sense, that way!

One could put an "auxiliary label" on panel next to the "L" and "R" with a
Dyno Label, or with another favorite method, though.
--
Jim in NC

"Travis Marlatte" wrote in
t:

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.

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

wrote

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.

I think you mis-interpreted his comments. He said (at least I think he
said) that one mag fires the top plugs on the left cylinders and the same
mag fires the bottom plugs on the right side cylinders.
--
Jim in NC

On Mar 5, 11:04 am, "Morgans" wrote:
wrote



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.

I think you mis-interpreted his comments. He said (at least I think he
said) that one mag fires the top plugs on the left cylinders and the same
mag fires the bottom plugs on the right side cylinders.
--
Jim in NC

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.

Dan

On my "larger Continental" the left mag fires top plugs on left side and
bottom plugs on right side. Vice versa for right mag.
DL
wrote in message
ps.com...
On Mar 5, 11:04 am, "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.

Dan

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

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.
--
Jim in NC

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.