IO 470 Fouled Plug

[Anthony]

My engine analyzed is telling me that the spark plug on the #6
cylinder, left mag is fouled. I have a new plug, but can't tell which
cylinder #6 is and whether it's the plug on the top or the bottom....
Can anyone tell me which plug it is...?

Thanks much,

Anthony

[George Patterson]

Anthony wrote:
> My engine analyzed is telling me that the spark plug on the #6
> cylinder, left mag is fouled. I have a new plug, but can't tell which
> cylinder #6 is and whether it's the plug on the top or the bottom....
> Can anyone tell me which plug it is...?

Number 6 is the rearmost cylinder. Trace the wires to work out which plug is
connected to the left mag.

George Patterson
Coffee is only a way of stealing time that should by rights belong to
your slightly older self.

[Jon Kraus]

I think that the cylinders are numbered on the intake manifold. THe
number is cast right into the manifold. Also, I believe that the bottom
plugs are the ones that tend to foul. Did you try to do a lean runup to
try and "un-foul" the plug? I have had good luck doing that.

Jon Kraus
'79 Mooney 201
4443H @ TYQ




Anthony wrote:
> My engine analyzed is telling me that the spark plug on the #6
> cylinder, left mag is fouled. I have a new plug, but can't tell which
> cylinder #6 is and whether it's the plug on the top or the bottom....
> Can anyone tell me which plug it is...?
>
> Thanks much,
>
> Anthony
>

[Orval Fairbairn]

In article <YyBCf.1306$Ix.796@trnddc07>,
George Patterson > wrote:

> Anthony wrote:
> > My engine analyzed is telling me that the spark plug on the #6
> > cylinder, left mag is fouled. I have a new plug, but can't tell which
> > cylinder #6 is and whether it's the plug on the top or the bottom....
> > Can anyone tell me which plug it is...?
>
> Number 6 is the rearmost cylinder. Trace the wires to work out which plug is
> connected to the left mag.
>
> George Patterson
> Coffee is only a way of stealing time that should by rights belong to
> your slightly older self.


I have an old Continental Operators's handbook (for the E-225 series),
which shows #1 as rifgt rear, #6 is left front. I doubt that Continental
has changed their numbering system on the O-470 series.

On a Lycoming, #1 is right front; #6 is left rear.

--
Remve "_" from email to reply to me personally.

[George Patterson]

Orval Fairbairn wrote:

> I have an old Continental Operators's handbook (for the E-225 series),
> which shows #1 as rifgt rear, #6 is left front. I doubt that Continental
> has changed their numbering system on the O-470 series.

According to my A&P at the time, right front was #1 on my Continental O-200.

George Patterson
Coffee is only a way of stealing time that should by rights belong to
your slightly older self.

[Dave Stadt]

"George Patterson" > wrote in message
news:mQCCf.13187$K17.13085@trnddc03...
> Orval Fairbairn wrote:
>
>> I have an old Continental Operators's handbook (for the E-225 series),
>> which shows #1 as rifgt rear, #6 is left front. I doubt that Continental
>> has changed their numbering system on the O-470 series.
>
> According to my A&P at the time, right front was #1 on my Continental
> O-200.
>
> George Patterson
> Coffee is only a way of stealing time that should by rights belong to
> your slightly older self.

Right rear is #1 on an O-200. Left front is #4.

[Doug]

"Prooving" that on different engines there are different numbering
schemes.

[Jay Honeck]

>> I have an old Continental Operators's handbook (for the E-225 series),
>> which shows #1 as rifgt rear, #6 is left front. I doubt that Continental
>> has changed their numbering system on the O-470 series.
>
> According to my A&P at the time, right front was #1 on my Continental
> O-200.

Lycomings have the numbers stamped right in the engine case. Don't
Continentals?
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"

[Michelle]

Anthony wrote:
> My engine analyzed is telling me that the spark plug on the #6
> cylinder, left mag is fouled. I have a new plug, but can't tell which
> cylinder #6 is and whether it's the plug on the top or the bottom....
> Can anyone tell me which plug it is...?
>
> Thanks much,
>
> Anthony
>
#6 should be the front most cylinder.
Look at the plug leads mine are labeled T1, B1,T2,B2, etc.
Michelle

[Dave Stadt]

"Jay Honeck" > wrote in message
news:hvKCf.517589$084.337062@attbi_s22...
>>> I have an old Continental Operators's handbook (for the E-225 series),
>>> which shows #1 as rifgt rear, #6 is left front. I doubt that Continental
>>> has changed their numbering system on the O-470 series.
>>
>> According to my A&P at the time, right front was #1 on my Continental
>> O-200.
>
> Lycomings have the numbers stamped right in the engine case. Don't
> Continentals?
> --
> Jay Honeck
> Iowa City, IA
> Pathfinder N56993
> www.AlexisParkInn.com
> "Your Aviation Destination"


Yes, they are cast into the case.

[RST Engineering]

Page A-3-1 of the Continental O-470 Maintenance Manual: #6 cylinder is the
front port side cylinder. As Michelle said, it is the most forward of the
six cylinders and is directly on the OPPOSITE side of the engine from the
oil cooler.

Looking at the O-470 engine from the top:



Prop Flange
Oil Cooler
6
5
4
3
2
1

Magnetos



What's this "left" and "right" stuff from you old geezers? You no speaka da
port and starboard likea you teacher done taught you? Left and right swap
sides depending on which end of the engine you are looking at.

Me? I'd pull the bottom plug for inspection first. 99/100 of the time
that's the fouled one.

Jim





"George Patterson" > wrote in message
news:YyBCf.1306$Ix.796@trnddc07...
> Anthony wrote:
>> My engine analyzed is telling me that the spark plug on the #6
>> cylinder, left mag is fouled. I have a new plug, but can't tell which
>> cylinder #6 is and whether it's the plug on the top or the bottom....
>> Can anyone tell me which plug it is...?
>
> Number 6 is the rearmost cylinder. Trace the wires to work out which plug
> is connected to the left mag.
>
> George Patterson
> Coffee is only a way of stealing time that should by rights belong to
> your slightly older self.