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Re: 8N Ford 6Volt to 12 Volt Conversion

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Author  [Modern View]

12-11-2012 21:38:19

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OK guys, I'll try to find an oem resistor. The owner of this tractor had put a jumper across the terminals of the resistor when it burned out so he could feed his critters, but the points didn't like it and eventually gave up. That's when he asked me to convert it to 12V. I've worked on the engines of these little tractors quite a bit, but never did a 12V conversion on one.

I guess I should ask; What is the voltage I should be shoot'n for when measured at the terminal on top the coil? It's my understanding that the original 6 volt system was reduced to near 4 volts at the points by the oem resistor. Would that be a bit too much to expect on a 12 volt system.

I found some 12 volt conversion information on the 'net' that showed a second resistor in series with the oem resistor but it didn't say whether the coil was still 6V or had been changed to 12V.

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Dell (WA)

12-12-2012 09:11:29

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 Re: 8N Ford 6Volt to 12 Volt Conversion in reply to Grabatire, 12-11-2012 21:38:19  
grabatire.........many times, instead of replacing the burned points, shadetree mechanics will "jump" the ballast resistor for hotter sparkies and eazier starting. Unfortunately, they fergitt to remove the jumper and MELT the insulative tar inside the squarecan coil and will no longer start 'cuz you end up with weak sparkies and BAD coil.

Heres the deal on extra resistor. Many "bubba" conversions are done on the "cheap". Use the original ballast resistor plus a 12V-to-6V conversion resistor in series like flashlite batterys. (resistors are cheaper than new 12V coil)

As fer voltage readings, about 4-volts at top of the 6V squarecan coil and about 10-volts at top of new 12V squarecan coil (with the points CLOSED) .........Dell, yer self-appointed sparkie-meister

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