9N pertronix failure replys

[Ron Tron]

I want to thank all who replied and clear some things up.
First it is a 12 volt converted system and second the tractor that has been running for years wired the same way as the second tractor whose pertronix has failed twice. The second time after running for a few minutes. They both have solid copper wires that yesterdaystractors sells. They both have both ballast resistors as well as the inline resistors. I just can't make sense of it. Both have the same 12 volt square can coils not that 280 dollar conversion to a vehicle coil that yesterdaystractors sells. I would love to convert it to a vehicle type coil if it would work but I have car coils laying around here and I don't want to pay 280 dollars for just the plate and spark plug thingy that goes on top of the distributor. Any comment again would be helpful.

 

[Gambles]

Does Pertronix recommend solid wires?

 

[jimtrs]

(quoted from post at 12:24:04 10/31/21) I want to thank all who replied and clear some things up.
First it is a 12 volt converted system........
They both have solid copper wires.....
They both have both ballast resistors as well as the inline resistors......
Both have the same 12 volt square can coils......
Any comment again would be helpful.

Solid copper wires are usually a no-no with electronic ignition. Pertronix require suppression wires, due to EMI.

12 volt front mount coils (+/- 1.0 ohms of primary resistance) still require the oem ballast resistor, but should not have another inline resistor

 

[300jk]

I will agree with jimtrs. Solid core wires should not be used. I
was fighting a poor running Oliver 1650 with Petronix in it. I
learned a lot from the helpful guys on this site. My issue was
not with the Petronix unit, but a bunch of other issues piled
onto one another. If it is 12v system I would buy a coil for a
12v system that states right on it no external resistor
required. The one I used was from Napa and has the
number 905 on the coil, and IC14 as a part number on the
box. Do not use any other resistor with this coil. It is not
needed. Im guessing the wires may be causing the failure.

 

[MarkB_MI]

Non-resistor ignition wires are known to cause Pertronix failures. Your CNH dealer should have resistor wires.

 

[Ron Tron]

(quoted from post at 10:16:46 10/31/21) Does Pertronix recommend solid wires?

no they don't recommend solid wires. They recommend carbon fiber wires but the solid ones I have on my first 9N have been working for 10 years

 

[300jk]

No they dont recommend them. Im pretty sure from my
recent research they say to not use them. I thought at first I
had that issue because dad last replaced the plug wires. I
thought he used the wrong ones till I looked and they were
correct. Some here say they have used solid core wires with
no problems. To be honest Im not sure why youve not had
any issues with your other tractor. Maybe less run time ? I
would use what Petronix recommends. I do not know
everything about these units, but like I said I learned a lot
here. I do know also the unit needs a continuous 12 volts to
function right. I hope you get it figured out. Can be really
frustrating and costly. I would double check plugs, wires, cap,
and rotor for issues also. Even corrosion in the plug wire
ends under the rubber boots. That was one of my issues.

 

[Mike in Ne]

You said the resistors were still there. The pertronix should be fed with a full 12 volts. I have mine with 12v to the coil and the
distributor.

 

[MI-Bill]

somewhere in the literature they send with the pertronix, they state no warranty if you use copper wire.

 

[JMOR]

(quoted from post at 18:12:08 10/31/21) somewhere in the literature they send with the pertronix, they state no warranty if you use copper wire.

have several installation instruction sheets from Pertronix the make no mention of copper or suppression type wires. Either that is a recent addition or it applied only to the later Pertronix II and III models.

 

[JMOR]

You/he can not use the round can IC14 coil on top of a front mount distributor.

 

[jimtrs]

(quoted from post at 13:42:01 10/31/21) If it is 12v system I would buy a coil for a
12v system that states right on it no external resistor
required. The one I used was from Napa and has the
number 905 on the coil, and IC14 as a part number on the
box. Do not use any other resistor with this coil. It is not
needed. Im guessing the wires may be causing the failure.

300,
ic14sb is a round can coil. Great to use on 12v conversions that have round can coils. Rontron has a front mount distributor and coil. The design of these coils is fragile. Even with a 12v version of this type of coil, the oem ballast resistor on the N series Fords is still required. But, as Mike stated above, the pertronix 12v module should be fed with full 12v (separate wire)

This post was edited by jimtrs on 10/31/2021 at 03:45 pm.

 

[300jk]

It is on their website.

 

[300jk]

Ok I think I may understand this. A coil for his tractor has no
internal resistor even if it is labeled a 12 volt coil. To be
honest Ive never monkeyed around with the smaller fords. In
my mind a true 12 volt system with a true 12 volt coil should
not need an inline ballast resistor. If a true 12 volt coil which is
has an ohm rating of 3 should work for his system. 12 volts
divided by 3 ohms of resistance would give around 4 amps
which I heard here was ideal. Im not sure why another
resistor is necessary unless its really a 6 volt coil and not a
12 volt internally resisted coil. Like I said Ive never played
with a Ford. Please school me. Im willing to learn !

 

[JMOR]

(quoted from post at 19:23:04 10/31/21) Ok I think I may understand this. A coil for his tractor has no
internal resistor even if it is labeled a 12 volt coil. To be
honest Ive never monkeyed around with the smaller fords. In
my mind a true 12 volt system with a true 12 volt coil should
not need an inline ballast resistor. If a true 12 volt coil which is
has an ohm rating of 3 should work for his system. 12 volts
divided by 3 ohms of resistance would give around 4 amps
which I heard here was ideal. Im not sure why another
resistor is necessary unless its really a 6 volt coil and not a
12 volt internally resisted coil. Like I said Ive never played
with a Ford. Please school me. Im willing to learn !

quare can coils are 6v=1 to 1.5 Ohms, 12v =2.5 Ohms, and not what most would call a true 12v coil. So, use the ballast.

 

[Royse]

300jk, perhaps a picture of the early Ford coil will help.
They are not the same as what you are thinking of.
Otherwise, with the round can coil, you are right.
No external resistor required when it say so.
These are just their own special beast.

 

[Tramway Guy]

The correct wires are available from Brillman.

 

[Hobo,NC]

Those EI set ups are particular when it comes to those garbage front mount coils. I have had them with EI that would not fire on EI but run well on a contact ignition system.

Its best to just get rid of the front mount coil life will be good...

https://forums.yesterdaystractors.com/viewtopic.php?t=1399069&highlight=belden

https://forums.yesterdaystractors.com/viewtopic.php?t=1385314&highlight=belden

 

[Phlash-OK]

I have a print out Front Coil Conversion (to standard round coil) by Hobo. It gives details how to gut old Square coil and
wire for round coil. I have one on 9N for 20 yes works fine. Have gutted one recently also. I could not find in archives,
if you want a copy I could send it to you