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talew(at)bellsouth.net
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 Posted: Tue Jun 14, 2011 2:07 pm Post subject: Detonation |
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Dennis ,
My observation about the mags was not an accusation . What I have seen as a
flight engr . on both
the R2800 and R3350 and other internal combustion engines is that detonation is
a mixture or timing
problem and does not flatten the electrodes of a plug . Broken valves or their
parts usually are the culprit .
What confidence level do you have that the pistons now installed are exactly the
same as the
ones that were removes .
"Lookie -lou"
Terry Lewis
---
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dsavarese0812(at)bellsout
Guest
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| Posted: Tue Jun 14, 2011 2:33 pm Post subject: Detonation |
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Terry, I didn't take it as an accusation. I was simply stating that I
removed the two cylinders for Doc and on the M14, it does not require
removal of the magnetos. Doc's detonation issue was definitely a
mixture issue caused by an intake leak.
The pistons can not under any circumstances strike the spark plugs in an
M14. The M14 cylinder combustion chamber is hemispherical and no stock
flat piston in the M14 can be "pushed" into the combustion chamber
without causing serious damage. One revolution and bingo, the engine
would be trashed. Now that speaks for the two cylinders that were
replaced and the spark plug ground element was moved against the
electrode of the spark plug on these two cylinders (these are automotive
spark plugs). There is no explanation as to why the spark plugs in #4
(an original cylinder) were also with the ground element against the
electrode and then again last Sat-Sun on #6, another of the original
cylinders. After removal of the second intake gasket on the cylinder
intake insert (the replacement cylinders were shipped with the gaskets
already installed) and installation of the replacement intake tubes,
the engine was run up to 80%, mag drop was checked and normal and upon
shut down temperature readings were taken on all cylinders. Temps were
just fine.
Dennis
On 6/14/2011 5:04 PM, T A LEWIS wrote:
[quote]
Dennis ,
My observation about the mags was not an accusation . What I have seen as a
flight engr . on both
the R2800 and R3350 and other internal combustion engines is that detonation is
a mixture or timing
problem and does not flatten the electrodes of a plug . Broken valves or their
parts usually are the culprit .
What confidence level do you have that the pistons now installed are exactly the
same as the
ones that were removes .
"Lookie -lou"
Terry Lewis
---
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talew(at)bellsouth.net
Guest
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| Posted: Tue Jun 14, 2011 3:00 pm Post subject: Detonation |
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Thanks for the reply Dennis ,
That answers the detonation mystery . As to the plugs , I read that someone was
advocating using
a longer plug to avoid oil contamination on the bottom plugs . That would be a
hotter plug an not an asset
on this engine . I am sure that Doc is using the correct plug . Lets see if the
mixture cures the plug flattening .
Terry Lewis
---
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viperdoc(at)mindspring.co
Guest
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| Posted: Tue Jun 14, 2011 3:29 pm Post subject: Detonation |
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Terry,
I'm using the NGK br6 plugs which are the same as what I started with almost
5 years ago now. I change the plugs each year generally throwing away a set
of plugs with only 20 to 30 hours on them. I just took some pictures of the
elements on the plugs from one of the offended cylinders. Will upload them
later this evening. Have to run some errands for the practice right now.
Doc
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talew(at)bellsouth.net
Guest
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| Posted: Tue Jun 14, 2011 4:41 pm Post subject: Detonation |
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Doc ,
I would have bet on that . I have several friends that are doctors and they
would not
go on a limb like that either . But like a doc if you don't ask , well , you
don't know where
to go next .
I did not know Dennis was on the case or I would have framed my inquires
different . My CJ has
his ignition system so I know Dennis by reputation . I now have confidence that
you will find the
answer .
Terry Lewis
oops !
I almost forgot .
Looky- loo
---
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viperdoc(at)mindspring.co
Guest
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| Posted: Tue Jun 14, 2011 6:55 pm Post subject: Detonation |
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Terry,
I posted pix of the one of the plugs. Hope they made it through the com
Nazis.
I'm just looking for answers. Not offended by anything. All questions and
all answers are considered. This is my rosie pink that is sitting behind
this this thing.
Seems I am always running across the Zebras or is it just the "Full Moon"?!!
Just ready to put this crazy quirk behind me. So back to pulling all the
plugs, rechecking the gaps, rechecking the valve lash, scoping all the
cylinders, pull a lower super charger intake tube to look at the lower
gravity side of the supercharger, burn SOAP samples on the before cylinder
change oil and the after cylinder replacement oil, run a magnet in the
cylinders (all 9), and still trying to find a rentable smoke generator to
pressurize the supercharger via the manifold pressure line to look for any
other leak somewhere else?!! If all else fails, I am not opposed to pulling
the danged engine off and completely rebuilding the danged thing. Then try
to do all this crap in a couple of days!
Just starting to get frustrated. Uh almost forgot...MMO fixes everything!
Still love that rumbling radial though...but that YAK 9 on Barnstormers is
looking awfully appealing but the grass is always greener on the other side
of the fence. More expensive to feed and water too!
Doc
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mark.bitterlich(at)navy.m
Guest
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| Posted: Wed Jun 15, 2011 3:16 pm Post subject: Detonation |
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Yep, that is the OTHER "supposed expert" coming into the mix. TOM
JOHNSON This asshole is who I used to insure my airplanes with. No
longer.
If you want the truth about that guy, I'll be glad to tell you, but will
not unless you ask.
Mark
--
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f4ffm2(at)roadrunner.com
Guest
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| Posted: Wed Jun 15, 2011 4:09 pm Post subject: Detonation |
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Mark,
I am just astounded at your vicious attack on Tom Johnson.
I have known Tom for more than ten years now and have always found him to be a voice of reason. He has always provided great service on several insurance policies that I have/had with him. He is always good company and is one of the absolutely most knowledgeable Yak and M-14P enthusiasts in the country....plus, he's a damn good stick and mechanic.
As I said, I am astounded at your attack on one of the most valuable people in the Yak arena in the USA....and, no, I don't want to know what your issue is. That's your problem to work out.
Roger Baker_______________________________________________________________
On Jun 15, 2011, at 4:14 PM, Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E wrote:
[quote]
Yep, that is the OTHER "supposed expert" coming into the mix. TOM
JOHNSON This asshole is who I used to insure my airplanes with. No
longer.
If you want the truth about that guy, I'll be glad to tell you, but will
not unless you ask.
Mark
--
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mark.bitterlich(at)navy.m
Guest
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| Posted: Wed Jun 15, 2011 4:16 pm Post subject: Detonation |
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WHAT?
What are we talking about here?
--
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mark.bitterlich(at)navy.m
Guest
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| Posted: Wed Jun 15, 2011 4:20 pm Post subject: Detonation |
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I did not write this.
I do not know what person is trying to make me look like this, but I did NOT WRITE THIS.
I have had insurance with Tom Johnson for years and he never did me any wrong that I am aware of.
He is not an A__hole and he is a good professional insurance agent that I would not hesitate to use again.
This is not the first time I have seen this kind of thing done forging an email address, but it is the first time I have seen it done on the YAK list.
TOM! THIS DID NOT COME FROM ME. ANYONE that wants a GOOD REFERENCE for TOM JOHNSON is WELCOME to write me and I will give it.
And excuse my language, but if I ever am able to find out what freaking TERD wrote the below message (and yes I know how you did it), I will beat you to within a inch of your life.
This is really low.
Mark Bitterlich.
--
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tjyak50
Joined: 31 May 2007
Posts: 81
Location: Phoenix, AZ
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| Posted: Wed Jun 15, 2011 5:06 pm Post subject: Re: Detonation |
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Hold on everyone.
Mark Bitterlich did not post that.
He just called me and we discussed.
The poster is an anonymous sniper.
Please all disregard.
Tj
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brian(at)lloyd.com
Guest
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| Posted: Wed Jun 15, 2011 9:41 pm Post subject: Detonation |
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On Mon, Jun 13, 2011 at 6:45 AM, tjyak50 <tomjohnson(at)cox.net (tomjohnson(at)cox.net)> wrote:
| Quote: | --> Yak-List message posted by: "tjyak50" <tomjohnson(at)cox.net (tomjohnson(at)cox.net)>
There is about a mile of clearance from the top of the piston to the plug in those hemi-heads.
|
Right. Detonation will not move the electrodes. Only impact will do that. The visibile sign of detonation is having the surface of the piston wiped clean of all deposits. If the crown of the piston is clean, bright, and shiny, you have detonation. Severe detonation will melt a hole in the piston and may melt plug electrodes.
The pictures of the plugs are consistent with a plug that has been dropped on its electrode.
--
Brian Lloyd, WB6RQN/J79BPL
3191 Western Dr.
Cameron Park, CA 95682
brian(at)lloyd.com (brian(at)lloyd.com)
+1.767.617.1365 (Dominica)
+1.931.492.6776 (USA)
(+1.931.4.WB6RQN)
[quote][b]
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george(at)gesoco.com
Guest
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| Posted: Thu Jun 16, 2011 5:30 am Post subject: Detonation |
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I am not trying to throw cold water on the automotive spark plug conversions, but perhaps there is a reason that Aircraft spark plugs have the ground electrode beside the center electrode instead of on top of it. The aircraft plug ground electrodes are usually more massive or made of expensive metals that have high temperature capabilities.
There is also the question of quality control. I am quite sure that the aircraft spark plugs have a higher standard of quality control and the designs have been proven to different standards.
Maybe you got a bad batch of plugs.
George Coy
CAS Ltd.
714 Airport Rd.
Swanton VT 05488
802-868-5633 off
802-363-5782 cell
802-868-4465 Fax
george.coy(at)gmail.com (george.coy(at)gmail.com)
http://coyafct.com/
SKYPE george.coy
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Brian Lloyd
Sent: Thursday, June 16, 2011 1:39 AM
To: yak-list(at)matronics.com
Subject: Re: Re: Detonation
On Mon, Jun 13, 2011 at 6:45 AM, tjyak50 <tomjohnson(at)cox.net (tomjohnson(at)cox.net)> wrote:
--> Yak-List message posted by: "tjyak50" <tomjohnson(at)cox.net (tomjohnson(at)cox.net)>
There is about a mile of clearance from the top of the piston to the plug in those hemi-heads.
Right. Detonation will not move the electrodes. Only impact will do that. The visibile sign of detonation is having the surface of the piston wiped clean of all deposits. If the crown of the piston is clean, bright, and shiny, you have detonation. Severe detonation will melt a hole in the piston and may melt plug electrodes.
The pictures of the plugs are consistent with a plug that has been dropped on its electrode.
--
Brian Lloyd, WB6RQN/J79BPL
3191 Western Dr.
Cameron Park, CA 95682
brian(at)lloyd.com (brian(at)lloyd.com)
+1.767.617.1365 (Dominica)
+1.931.492.6776 (USA)
(+1.931.4.WB6RQN) | Quote: | | http://www.matronics.com/Navigator?Yak-List |
01234567
[quote][b]
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viperdoc(at)mindspring.co
Guest
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| Posted: Thu Jun 16, 2011 6:16 am Post subject: Detonation |
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Twice? Different Lot Numbers?
Doc
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of George Coy
Sent: Thursday, June 16, 2011 8:28 AM
To: yak-list(at)matronics.com
Subject: RE: Re: Detonation
I am not trying to throw cold water on the automotive spark plug conversions, but perhaps there is a reason that Aircraft spark plugs have the ground electrode beside the center electrode instead of on top of it. The aircraft plug ground electrodes are usually more massive or made of expensive metals that have high temperature capabilities.
There is also the question of quality control. I am quite sure that the aircraft spark plugs have a higher standard of quality control and the designs have been proven to different standards.
Maybe you got a bad batch of plugs.
George Coy
CAS Ltd.
714 Airport Rd.
Swanton VT 05488
802-868-5633 off
802-363-5782 cell
802-868-4465 Fax
george.coy(at)gmail.com (george.coy(at)gmail.com)
http://coyafct.com/
SKYPE george.coy
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Brian Lloyd
Sent: Thursday, June 16, 2011 1:39 AM
To: yak-list(at)matronics.com
Subject: Re: Re: Detonation
On Mon, Jun 13, 2011 at 6:45 AM, tjyak50 <tomjohnson(at)cox.net (tomjohnson(at)cox.net)> wrote:
--> Yak-List message posted by: "tjyak50" <tomjohnson(at)cox.net (tomjohnson(at)cox.net)>
There is about a mile of clearance from the top of the piston to the plug in those hemi-heads.
Right. Detonation will not move the electrodes. Only impact will do that. The visibile sign of detonation is having the surface of the piston wiped clean of all deposits. If the crown of the piston is clean, bright, and shiny, you have detonation. Severe detonation will melt a hole in the piston and may melt plug electrodes.
The pictures of the plugs are consistent with a plug that has been dropped on its electrode.
--
Brian Lloyd, WB6RQN/J79BPL
3191 Western Dr.
Cameron Park, CA 95682
brian(at)lloyd.com (brian(at)lloyd.com)
+1.767.617.1365 (Dominica)
+1.931.492.6776 (USA)
(+1.931.4.WB6RQN)012345678901234567
[quote][b]
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talew(at)bellsouth.net
Guest
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| Posted: Thu Jun 16, 2011 6:23 am Post subject: Detonation |
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I think these plugs are used in racing motorcycles .
I bought my last set at a bike shop . I could be wrong .
Terry
From: Roger Kemp M.D. <viperdoc(at)mindspring.com>
To: yak-list(at)matronics.com
Sent: Thu, June 16, 2011 10:13:29 AM
Subject: RE: Re: Detonation
Twice? Different Lot Numbers?
Doc
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of George Coy
Sent: Thursday, June 16, 2011 8:28 AM
To: yak-list(at)matronics.com
Subject: RE: Yak-List: Re: Detonation
I am not trying to throw cold water on the automotive spark plug conversions, but perhaps there is a reason that Aircraft spark plugs have the ground electrode beside the center electrode instead of on top of it. The aircraft plug ground electrodes are usually more massive or made of expensive metals that have high temperature capabilities.
There is also the question of quality control. I am quite sure that the aircraft spark plugs have a higher standard of quality control and the designs have been proven to different standards.
Maybe you got a bad batch of plugs.
George Coy
CAS Ltd.
714 Airport Rd.
Swanton VT 05488
802-868-5633 off
802-363-5782 cell
802-868-4465 Fax
george.coy(at)gmail.com (george.coy(at)gmail.com)
http://coyafct.com/
SKYPE george.coy
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Brian Lloyd
Sent: Thursday, June 16, 2011 1:39 AM
To: yak-list(at)matronics.com
Subject: Re: Re: Detonation
On Mon, Jun 13, 2011 at 6:45 AM, tjyak50 <tomjohnson(at)cox.net (tomjohnson(at)cox.net)> wrote:
--> Yak-List message posted by: "tjyak50" <tomjohnson(at)cox.net (tomjohnson(at)cox.net)>
There is about a mile of clearance from the top of the piston to the plug in those hemi-heads.
Right. Detonation will not move the electrodes. Only impact will do that. The visibile sign of detonation is having the surface of the piston wiped clean of all deposits. If the crown of the piston is clean, bright, and shiny, you have detonation. Severe detonation will melt a hole in the piston and may melt plug electrodes.
The pictures of the plugs are consistent with a plug that has been dropped on its electrode.
--
Brian Lloyd, WB6RQN/J79BPL
3191 Western Dr.
Cameron Park, CA 95682
brian(at)lloyd.com (brian(at)lloyd.com)
+1.767.617.1365 (Dominica)
+1.931.492.6776 (USA)
(+1.931.4.WB6RQN) | Quote: | | http://www.matronics.com/Navigator?Yak-List http://forums.matronics.com http://www.matronics.com/contribution |
012345678901234567
8
[quote][b]
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tjyak50
Joined: 31 May 2007
Posts: 81
Location: Phoenix, AZ
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| Posted: Thu Jun 16, 2011 7:02 am Post subject: Re: Detonation |
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These auto plugs run at Reno up to 140+" MAP safely.
Make sure your sound is on when you go to this website:
http://www.plugguy.com/
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viperdoc(at)mindspring.co
Guest
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| Posted: Thu Jun 16, 2011 7:24 am Post subject: Detonation |
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George,
The reason I changed to auto plugs 5 years ago was misfiring that was traced down to broken plug wires. The RU harnesses were cracking and worn out. The IRAN did not apparently include a new wiring harness when I bought the A/C because overlying harness definitely consistent of older wiring with a rubber cracking under the shielding. Nuff Said.
Anyway this conversion was easier than the other options.
This engine was performing fine without even a hint of loss of power, misfire, hesitation, or any other issues that would make me think I had a problem. The only reason I did a compression test was because of an audible exhaust leak when I pulled blades that developed over the last couple of months. I repeat, the engine was running fine and would blow the doors off any 52 or CJ even with two cylinders that turned out to have compressions in the 30’s. The only thing that has changed were then #1 and #3 cylinders. These were complete cylinders shift with "stock off the shelf pistons". Then as the old song goes, "we’re off to the rodeo."
Doc
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of George Coy
Sent: Thursday, June 16, 2011 8:28 AM
To: yak-list(at)matronics.com
Subject: RE: Re: Detonation
I am not trying to throw cold water on the automotive spark plug conversions, but perhaps there is a reason that Aircraft spark plugs have the ground electrode beside the center electrode instead of on top of it. The aircraft plug ground electrodes are usually more massive or made of expensive metals that have high temperature capabilities.
There is also the question of quality control. I am quite sure that the aircraft spark plugs have a higher standard of quality control and the designs have been proven to different standards.
Maybe you got a bad batch of plugs.
George Coy
CAS Ltd.
714 Airport Rd.
Swanton VT 05488
802-868-5633 off
802-363-5782 cell
802-868-4465 Fax
george.coy(at)gmail.com (george.coy(at)gmail.com)
http://coyafct.com/
SKYPE george.coy
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Brian Lloyd
Sent: Thursday, June 16, 2011 1:39 AM
To: yak-list(at)matronics.com
Subject: Re: Re: Detonation
On Mon, Jun 13, 2011 at 6:45 AM, tjyak50 <tomjohnson(at)cox.net (tomjohnson(at)cox.net)> wrote:
--> Yak-List message posted by: "tjyak50" <tomjohnson(at)cox.net (tomjohnson(at)cox.net)>
There is about a mile of clearance from the top of the piston to the plug in those hemi-heads.
Right. Detonation will not move the electrodes. Only impact will do that. The visibile sign of detonation is having the surface of the piston wiped clean of all deposits. If the crown of the piston is clean, bright, and shiny, you have detonation. Severe detonation will melt a hole in the piston and may melt plug electrodes.
The pictures of the plugs are consistent with a plug that has been dropped on its electrode.
--
Brian Lloyd, WB6RQN/J79BPL
3191 Western Dr.
Cameron Park, CA 95682
brian(at)lloyd.com (brian(at)lloyd.com)
+1.767.617.1365 (Dominica)
+1.931.492.6776 (USA)
(+1.931.4.WB6RQN)012345678901234567
[quote][b]
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viperdoc(at)mindspring.co
Guest
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| Posted: Thu Jun 16, 2011 7:54 am Post subject: Detonation |
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Bryan,
I glad you can say that but unless someone F&^%#$ the airplane after I personally gapped them, put them in and torqued them that was not the case. They were not dropped. Especially two brand danged new sets after each occurrence.
That would lead me back to the initial thoughts when I found the plug gaps flattened on #1, #3, and #4. The second time around it was on #6. Maybe I just need to call the FBI and let them investigate this as tampering with an aircraft? What do ya think?
There plenty of drama going on around 08A these days with certain politicians wanting to close the airport and I have been dead center in the middle of the fight. Not because I wanted to be though.
Doc
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Brian Lloyd
Sent: Thursday, June 16, 2011 12:39 AM
To: yak-list(at)matronics.com
Subject: Re: Re: Detonation
On Mon, Jun 13, 2011 at 6:45 AM, tjyak50 <tomjohnson(at)cox.net (tomjohnson(at)cox.net)> wrote:
--> Yak-List message posted by: "tjyak50" <tomjohnson(at)cox.net (tomjohnson(at)cox.net)>
There is about a mile of clearance from the top of the piston to the plug in those hemi-heads.
Right. Detonation will not move the electrodes. Only impact will do that. The visibile sign of detonation is having the surface of the piston wiped clean of all deposits. If the crown of the piston is clean, bright, and shiny, you have detonation. Severe detonation will melt a hole in the piston and may melt plug electrodes.
The pictures of the plugs are consistent with a plug that has been dropped on its electrode.
--
Brian Lloyd, WB6RQN/J79BPL
3191 Western Dr.
Cameron Park, CA 95682
brian(at)lloyd.com (brian(at)lloyd.com)
+1.767.617.1365 (Dominica)
+1.931.492.6776 (USA)
(+1.931.4.WB6RQN) | Quote: | | http://www.matronics.com/Navigator?Yak-List |
01234567
[quote][b]
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cjpilot710(at)aol.com
Guest
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| Posted: Thu Jun 16, 2011 8:09 am Post subject: Detonation |
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Yesterday in getting my approval from the FAA to take my Powerplant rating, I brought up the subject about your detonation problem and the plugs. He's very familiar with the M-14. He agree with me that you must likely have an induction leak some where. As for the plugs being flat, since they are automotive type, he said, he'd often seen that in auto engines that detonation problems. The "hook over design" lends it self to bending because of the heat and pressure wave of the flame front. Aviation type plugs are of course designed with "dual poles" that are structured so as not to bend, thus during detonation they don't close up, - - something we lose when going to auto plugs.
Jim "Pappy" Goolsby
In a message dated 6/16/2011 11:54:48 A.M. Eastern Daylight Time, viperdoc(at)mindspring.com writes:
| Quote: |
Bryan,
I glad you can say that but unless someone F&^%#$ the airplane after I personally gapped them, put them in and torqued them that was not the case. They were not dropped. Especially two brand danged new sets after each occurrence.
That would lead me back to the initial thoughts when I found the plug gaps flattened on #1, #3, and #4. The second time around it was on #6. Maybe I just need to call the FBI and let them investigate this as tampering with an aircraft? What do ya think?
There plenty of drama going on around 08A these days with certain politicians wanting to close the airport and I have been dead center in the middle of the fight. Not because I wanted to be though.
Doc
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Brian Lloyd
Sent: Thursday, June 16, 2011 12:39 AM
To: yak-list(at)matronics.com
Subject: Re: Re: Detonation
On Mon, Jun 13, 2011 at 6:45 AM, tjyak50 <tomjohnson(at)cox.net (tomjohnson(at)cox.net)> wrote:
--> Yak-List message posted by: "tjyak50" <tomjohnson(at)cox.net (tomjohnson(at)cox.net)>
There is about a mile of clearance from the top of the piston to the plug in those hemi-heads.
Right. Detonation will not move the electrodes. Only impact will do that. The visibile sign of detonation is having the surface of the piston wiped clean of all deposits. If the crown of the piston is clean, bright, and shiny, you have detonation. Severe detonation will melt a hole in the piston and may melt plug electrodes.
The pictures of the plugs are consistent with a plug that has been dropped on its electrode.
--
Brian Lloyd, WB6RQN/J79BPL
3191 Western Dr.
Cameron Park, CA 95682
brian(at)lloyd.com (brian(at)lloyd.com)
+1.767.617.1365 (Dominica)
+1.931.492.6776 (USA)
(+1.931.4.WB6RQN) | Quote: | | http://www.matronics.com/Navigator?Yak-List |
01234567
8 |
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Cliff.Coy
Joined: 03 Mar 2007
Posts: 46
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| Posted: Thu Jun 16, 2011 8:17 am Post subject: Detonation |
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This is one of those threads that I watch and think "Do I *really* want to get involved here?" and 90% of the answer is :
No. No I do not. I'm not an expert on spark plugs and I've never encountered this problem before.
NGK has a tech support number: 1-877-473-6767 prompt #2 for assistance.
I think as long as you don't spill the beans that you're working on an aircraft engine they'll give you some good advice.
Secondly, for all other people who are having ignition issues related to the wiring:
I have replacement *silicone* wire which directly replaces the original Russian wire.
It doesn't break down but it *is* susceptible to nicks and cuts (just like any other wire)
It's $3/foot.
Here are the instructions:
Loosen up the ignition harness nuts to release the rubber packings.
Twist the new wire (greased with Dow Corning #4) to the old wire at the mag and pull it through to the elbow.
Attach the new wire to the spring and cigarette and pull back towards the mag to snug everything up.
Cut to length at the mag and insert the set screw.
Verify Continuity to the lead end.
Secure the packing nuts.
Repeat.
I apologize for not being helpful concerning your issue, but I am trying to offer other options.
Just sayin.
Cliff
--
Clifford Coy
Border Air Ltd.
629 Airport Rd.
Swanton, VT 05488
802-868-2822 TEL
802-868-4465 FAX
Skype: Cliff.Coy
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