[Farmall] Coil On Super M

Stan Bass srbheadlight at yahoo.com
Thu Jun 3 09:00:46 PDT 2010


On our 4cyl Farmalls, the 6V coil is about 1.5 ohms, the 12V coil with internal resistor is about 3 ohms, the inline resistor with a 6V coil on a 12V system would be 1.5 ohms. The exception to that would be one of the variable resistors that starts at about 0.5 ohms for more punch at the cold start, but then increases it's resistance to 1.5 ohms as it heats up.
Stan(VA).

--- On Thu, 6/3/10, Mike Sloane <mikesloane at verizon.net> wrote:

> From: Mike Sloane <mikesloane at verizon.net>
> Subject: Re: [Farmall] Coil On Super M
> To: "Farmall/IHC mailing list" <farmall at lists.antique-tractor.com>
> Date: Thursday, June 3, 2010, 8:47 AM
> I would have to guess that your
> resistor is either the wrong one or is 
> defective. All ballast resistors are not the same. With the
> proper 
> resistor (at least 3-5 ohms), you should see about 6 volts
> at the coil, 
> not 12. By the way, the resistor should installed in a spot
> that is 
> relatively cool and between the ignition switch and the
> coil.
> 
> Mike
> 
> On 6/3/2010 8:21 AM, DTerry3455 at aol.com
> wrote:
> > What would cause a tractor to continue to burn up
> coil's. Has burnt up  two
> > in the last month,running a resistor with them, have
> twelve volts going to
> > resistor and twelve going to distributor on the
> negative side to  the coil
> > coming from resistor which is new, any help would
> be  appreciated.
> >
> > Thanks
> > Buddy
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> >
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> 


      




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