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Farmall & IHC Tractors Discussion Forum

Farmall Super A - Ignition Switch

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Author  [Modern View]

07-31-2020 21:43:03

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This message is a reply to an archived post by Brian Luton on June 06, 2016 at 17:46:27.
The original subject was "Farmall Super A Ignition Switch".

I just experienced the same problem with my Super A. Replaced condenser, coil. Points open and close but no spark from coil.Voltmeter doesn't move when plunger pulled out but the starter turns over.Ordered new points and a switch. If you see this Brian, did the new switch work? Are there grounds that could be involved? Not sure where the grounds are.Can't see any problems with wires. Thank You

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08-01-2020 10:18:07

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 Re: Farmall Super A - Ignition Switch in reply to rifle99, 07-31-2020 21:43:03  
A two terminal switch (the mushroom headed push pull type) is used for point and coil distributor style ignition. A single terminal switch is for a magneto ignition. The point/coil ignition switch is connected from the load side of the ammeter, to the switch, then from the other terminal to the negative side of the coil. (assumes a standard original coil and point system. Jim

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Ken Hansen

08-01-2020 07:31:13

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 Re: Farmall Super A - Ignition Switch in reply to rifle99, 07-31-2020 21:43:03  
Quoting Removed, click Modern View to see

Very true! If the tractor has a magneto the switch only grounds the terminal on the side of the magneto to kill the engine. Therefor it would not have any effect on the amp-meter(don't thing they ever used volt meters) reading.

Now if you actually have a coil and distributor set up the switch would turn on or off power to the coil and then it may effect the reading on the amp-meter. I'd have to look up the wiring on a distributor system to be 100% sure. But I assume someone else has this information on the tip of their tongue so I'll leave that to them!

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J Hamilton

07-31-2020 21:51:01

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 Re: Farmall Super A - Ignition Switch in reply to rifle99, 07-31-2020 21:43:03  
Be sure it's a switch for distributor and not for a magneto. That would be a major difference

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