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Ford 9N, 2N & 8N Discussion Forum
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melted coil

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pvf

06-21-2004 17:20:03




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I have a 41 9n that was starting fine until recently. And unusual smell and close inspection revealed a coil that had melted into the distributor. I removed the coil and distributor and replaced them with a new coil and rebuilt distributor. I charged the battery because it was low and when I turned the key on the coil melted again. I thought the coil had been faulty or the spark had been left on, but now I feel there is a short or something else. Your thoughts and advise will be appreciated.

thanks, pvf

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Dell (WA)

06-21-2004 17:42:33




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 Re: melted coil in reply to pvf, 06-21-2004 17:20:03  
PVF..... ...what aren't you telling us?

The 1-terminal squarecan OEM 6 volt frontmount ignition coil ABSOLUTELY must have its "infamous ballast resistor" in its ignition switch circuit. Otherwize, the ignition coil will melt its internal insulative tar and short out some of the primary windings.

Ballast resistors are like lightbulbs, they eather work or they don't. (unless someones been muckin'round)

Its simple to checkout the 1-terminal squarecan ignition circuit with yer eyeballs. Start at the coil terminal. That wire should go thru the sparkies tube directly to oneside of the "infamous ballast resistor" mounted on the backside of your dashpanel under the ammeter. The otherside of the ballast resistor should be connected to the ON side of your ignition switch. The otherside of your ignition switch should be connected to the bottem center battery power termanal of the insulated ballast mounting board.

Iff'n ya gottza 12 volt conversion, all bettz are OFF because there is no "official standard" way to electrically wire the ignition coil. But the scheme is still the same. Ya gotta have a resistor in yer frontmount ignition coil circuit somewhere or it will puke its guttz..... .....respectfully, Dell

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pvf

06-21-2004 18:37:03




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 Re: Re: melted coil in reply to Dell (WA), 06-21-2004 17:42:33  
What I'm not telling you

Dell,

You know there was this small wire coming of the ignition that was disconnected or broken that I thought was feeding the ohmmeter and spliced together before this tractor started melting coils.

Could this be the prblem?

Thanks Again,

pvf



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Dell (WA)

06-21-2004 19:04:01




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 Re: Re: Re: melted coil in reply to pvf, 06-21-2004 18:37:03  
PVF..... ....thar ya go, ya miss-wired sumptin didn't ya? Bettcha runnin pure battery volts directly to your coil, instead of volts cut-down by yer "infamous ballast resistor".

I dunn told ya how its supposta be wired. I flunked mindreading, just ask my ex-wife..... ..respectfully, Dell



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