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Super A with no spark
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mag

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Bob A

04-11-1999 10:36:32




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Thanks to all who have given advice on my Super A starting problems. Still not starting yet. Here's the latest:

Problems started after I tore down the front and replaced a leaking front seal. I went ahead and replaced bad wiring, new lights, fluids, battery. Would start and die within a few minutes. Rebuilt carb (Zenith). Same problem. Found sediment in line. Replaced in-line filter and fuel line and sediment bowl (due to leak). No help. Suspected condensor. Replaced condensor, points, plugs, rotor, cap. Now no fire at all!

Retraced everything and came up the same. Gave up and took carb and mag with coil to IH service center for them to test. They set the points, found where the condensor may have been grounding out but everything else was okay.

To test, I grounded a plug against the frame and turned over the ignition and no spark. Tried this with all plugs. Plug wires are okay. Set timing correct I think. Rechecked the gap on the points and it looks good. Ran new temporary jumper wires (10 gauge) to every lead (generator, starter and coil). No spark.

Suspected (a long shot here) bad ignition switch. Thought I could run a wire from the negative pole of the battery (6 volt positive ground) to the coil on the mag to bypass the ignition switch. Coil smoked and I burned the lead running from the condensor to the points. Was this a mistake?

WHAT AM I DOING WRONG HERE? Should not be this complicated.

Help!

Wishing I could go back to a leaking front seal....

Bob

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Farmall Gray

04-11-1999 14:47:39




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 Re: Super A with no spark - mag in reply to Bob A, 04-11-1999 10:36:32  
Are you sure you have a mag and not a distibutor?
A mag makes it's own current and does not need power from the battery. A mag only has 1 wire that runs to the ignition switch which just grounds it out. If the mag is working correctly,
it will make spark without the wire hooked up. If you ran current from the battery to the coil of a mag, you probably burned out the coil. Find someone who knows the difference between a mag and a distibutor before you go further.

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Bob A

04-11-1999 16:57:32




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 Re: Re: Super A with no spark - mag in reply to Farmall Gray, 04-11-1999 14:47:39  
Got a crash course on mags today. Should have read the article on timing the mags first. Very good article. Getting someone over this week who knows more about mags etc. Hopefully, did not cause major problems with the short. Anyway, lesson learned the hard way. Will find out later.



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Mey(NH)

04-11-1999 12:54:44




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 Re: Super A with no spark - mag in reply to Bob A, 04-11-1999 10:36:32  
Bob, If you go to the main page on this site and click on article archives, then scroll down until you see Timing your magnito ignition. That might help you understand a bit about mags and how to test your kill switch. It now sounds like you may have burned up some componants, I'de get that fixed, before you go on. Mey



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RK Smith

04-11-1999 12:19:05




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 Re: Super A with no spark - mag in reply to Bob A, 04-11-1999 10:36:32  
Sorry Bob - must say this and please don't take it the wrong way. You don't know what you are doing. You don't have a fundamental knowledge of ignition systems. I have no experience with mags so I can't help you, but you have gotten yourself to a point that I can't believe anyone can help you over the net. First, the seal replacement would not have affected the ignition system. The other things - - I'm really suspicious of them. I think you need to park it and find someone to come and troubleshoot it for you, and learn something yourself in the process, or take the tractor to a service center where they can get you up and running. Maybe you can find a local tractor service shop that isn't connected to a dealer and maybe will be reasonable. You need somebody with knowledge and a 12V tester. If you are not getting spark at the plug, you have to solve that problem FIRST! When you hear hoofbeats, - - expect horses, not zebras. Sorry, RKS

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