[AJD] IGNITION advice needed

[Jason]

Yes if the coil doesn't have an internal resistor I'd buy a new internal
resistor coil. Coils are cheap enough and being overheated hasn't done the
current one any favors.

On Sun, Oct 15, 2017, 1:54 PM Dean VP <deanvp at att.net> wrote:

> Ron,
>
>
>
> I would recommend overhauling the Mag if the owner will foot the bill.
> Otherwise inserting a resistor in the coil circuit is worth a try. Sounds
> like the coil is getting hot and causing an intermittent loss of
> connection. It may be damaged to the point that it needs to be replaced
> with a resistor coil. I hate half assed mods.  Nothing but trouble and it
> is hard to figure out what actually has been modified and if it has been
> done properly.  I don’t remember right now when JD changed from using
> Magneto’s to Distributors but JD’s first Wico Distributors were a POS. I
> also don’t remember what the ohm value of the resistor needs to be but I do
> know it needs to be high wattage. I suppose this info is in one of JR Hobbs
> books or in the Service bulletins but I don’t have time to go look right
> now.  The boss has me on a deadline right now. Get er done or else.
>
>
>
> Dean VP
>
> Snohomish, WA 98290
>
>
>
> -----Original Message-----
> From: antique-johndeere-bounces at lists.antique-tractor.com [mailto:
> antique-johndeere-bounces at lists.antique-tractor.com] On Behalf Of Ronald
> Cook
> Sent: Sunday, October 15, 2017 10:33 AM
> To: Antique tractor email discussion group <at at lists.antique-tractor.com>;
> Antique John Deere mailing list <
> antique-johndeere at lists.antique-tractor.com>
> Subject: [AJD] IGNITION advice needed
>
>
>
> A friend brought me an A John Deere with carburetor problems.  He wanted
> me to get it running right for him.  The carb was no problem and the
> tractor runs decent until it shuts off unexpectedly.  Sometime in the past,
> someone has converted the WICO mag to operate like a distributor. This is a
> 1948 model, so it is 12-volt.   It is using an external coil that is not
> internally resisted.  Just a hot 12-volt source from a switch to the coil.
> It gets hot.  Will this set up work alright if I put a resistor in the
> system or get an internally resisted coil?  If it were mine, I would put a
> distributor on it and it would be fine. Or overhaul the mag so it would
> work.
>
>
>
> Ron Cook, Salix, IA
>
>
>
>
>
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