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aftermarket coil conversion for front mount 9n

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9ndan

04-29-2004 18:35:56




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Last week the alternator on my 9n started overcharging and burnt up my 12v ford front mount coil. Got the alternator tested and ended up replacing it. Instead of buying another front mount coil I took my old one ground off the rivets and then gutted out the inside so all that was left was the wire from the points and the wire to the distributor cap. I got an Accel performance coil at the autoparts store for cheaper then buying the crap ford coil. Rigged the thing up and its running pretty well right now but i'm kind of wondering if this will affect the life of my points, as it seems to draw a fair bit more current then the normal coil. My points are set at .019" right now, does the change in coil affect what gap i should have them set at?

also i'm not quite sure what to do with the guts out of the old coil. It was old stock and the inside was full of a semi hard resin. Do old ignition coils contain PCBs? I know old flourescent light ballasts and transformers use PCBs in them.

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souNdguy

04-29-2004 21:19:45




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 Re: aftermarket coil conversion for front mount 9n in reply to 9ndan, 04-29-2004 18:35:56  
Most likely that 'crap ford coil' needed some external resistance to go with it. Most all front mount coils I've seen do.. even thought they claim '12v'. So unless you either had resistance in line with it.. or its directions state that no resistance was needed.. it may have been due to partial 'operator' error.. and not so much the 'crap ford coils' fault. Even the 12v coils from one of the more respected online dealers claim 12v.. but if you ask the dealer.. they will tell you that you need some resistance.

Soundguy

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Dell (WA)

04-29-2004 19:06:00




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 Re: aftermarket coil conversion for front mount 9n in reply to 9ndan, 04-29-2004 18:35:56  
Dan..... ....frontmount ignition timing is affected by the points gap. 0.015 is recommended for eather 6 or 12 volts. Your ignition points are designed for the heavier current draw of 6 volts. Most 12 volt coils draw less current than their 6 volt counterpart. And while yer condenser don't care 6 or 12 volts, it does care about the coil inductance (thats a technical term) and it may NOT be the correct capacitance to prevent points from burning. (thats a technical term for electrical arc metal transferance when the points open) And I have NO IDEA what might be the correct condenser size in microfarrads (thats a technical term of capacitance measurement) that your 12 volt Accell coil might require. And I don't know of any other electrical sized condenser that will fit yer frontmount distributor. Bottomline, watch yer points for burning caused by incorrect condenser.

I have no problem with your "customized" 12 volt frontmount coil conversion. Whatever make yer tractor run for you.

Oh yeah, the insulative tar. I doubt that it would have the dreaded PCB contaminates. Besides, what would you do with a "bad" un-opened frontmount coil? Your call..... ....respectfully, Dell, a 12 volt advocate for the right reason

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TonyMac

04-29-2004 18:50:09




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 Re: aftermarket coil conversion for front mount 9n in reply to 9ndan, 04-29-2004 18:35:56  
Hello! Did about the same except i went with a Jacobs 40KVolt coil it worked with the 1.4Ohm resistor but burnt up the points in about 10 seconds with out resistor. So i built a points fired solid state inginton kit and removed the resitor. Today was my second cutting with the new set up and so far so good. Also using Denso W14LU Plugs. Have loved the Hot~U in every thing i have put them in so far! Seam to double the power and cut gas consumption in half in an 8 horse Briggs&Strattion.

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9ndan

04-29-2004 18:55:14




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 Re: Re: aftermarket coil conversion for front moun in reply to TonyMac, 04-29-2004 18:50:09  
I've heard about the solid state ignition kit before, and heard that they use to sell them at radio shack, but now all radio shack sells is consumer electronics. Any idea where i could find plans to make the solid state ignition?



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flyN2low

04-29-2004 19:51:51




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 Re: Re: Re: aftermarket coil conversion for front in reply to 9ndan, 04-29-2004 18:55:14  
Here's a kit for 14 bucks.



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DavidO...Does not replace

04-30-2004 04:33:33




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 Re: Re: Re: Re: aftermarket coil conversion for fr in reply to flyN2low, 04-29-2004 19:51:51  
It should be noted that this kit DOES NOT replace the points as the true electronic ignition kits do. This kit will provide greatly extended points life, and a "hotter" spark. I installed dozens of similiar kits on cars prior to the auto industry going to "high voltage" electronic ignition systems. The old ignition systems provided coil outputs of about 20,000V. The newer "high voltage" electronic ignition systems raised that to about 40,000 V. Just bear in mind that there is nothing really wrong with the original ignition system design. It is dependable and easy to maintain. The more you alter or "mess around" with it, the harder it will be for you, or the next guy who owns that tractor, to deal with it.

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JerryU

04-30-2004 04:32:04




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 Re: Re: Re: Re: aftermarket coil conversion for fr in reply to flyN2low, 04-29-2004 19:51:51  
That be the one marketed by Radio Shack previously. Made by Vellman Electronics. As Mr. Dell respectfully said, it only works on negative ground, and I think 12 volt. My 9N was 12 volt converted before I got it and I stuck with it. I put one of these on and it works great. You need to run two wires out of the distributor--separate the strap from the points to the screw that feeds the coil and one wire from the points and one from the coil screw. This goes to the circuit board along with a ground and hot wire. No condensor.

If you run the wires out and put some plugs on them, if the circuit craps out, you can unplug the circuit board, tie the two wires together and hook them to a condensor and ground the condensor and you can be back in business. I made up a little setup to plug in the condensor, but in about three years have never had to use it.

Doesn't burn points either.

FWIW,

JU and his 9N working tractor with lotsa gizmos on it (Position control, 12 volt, live hydraulics, and a few other non original items)

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caution . . . Dell (WWA)

04-29-2004 23:28:05




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 Re: Re: Re: Re: aftermarket coil conversion for fr in reply to flyN2low, 04-29-2004 19:51:51  
CAUTION.....NEGATIVE GROUND ONLY.....won't work on our positive ground N's unless you "re-polarize", looks like a good kit for the experienced electronic's tinker that has FULL ACCESS to the coil and points, something that is semi-difficult with frontmount N-Distributors..... ...thanks for sharing, Dell



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