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Allis Chalmers Discussion Forum
Show Parts for Model:

Allis C Magneto With NO Spark

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bisenberger

06-09-2018 18:15:50




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What is the best way to test the condensor on a Fairbanks Morse magneto on an Allis Chalmer C?

What is the best way to test the coil on a Fairbanks Morse magneto on an Allis Chalmer C?

What other test would be appropriate?




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chaskaduo

06-14-2018 16:45:31




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 Re: Allis C Magneto With NO Spark in reply to bisenberger, 06-09-2018 18:15:50  
Could you elaborate more on the FM coils for Mercury outboard motors.



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bisenberger

06-14-2018 15:18:26




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 Re: Allis C Magneto With NO Spark in reply to bisenberger, 06-09-2018 18:15:50  
Quoting Removed, click Modern View to see

Thanks everyone for the suggestions.

Turns out the condenser was bad. I replaced it, now I have spark and my tractor runs as sweet as a 73 year old can



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tractorguy2

06-10-2018 13:07:41




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 Re: Allis C Magneto With NO Spark in reply to bisenberger, 06-09-2018 18:15:50  
You need to start by cleaning the points. If the condenser is bad. You will have fire at the points but not through the coil. Fairbanks magneto seen to have more bad coils than other brands.

There is a guy on ebay selling FM coils for Mercury outboard motors. They are much cheaper. I have used three of them with no trouble.



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Dick L

06-10-2018 10:27:19




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 Re: Allis C Magneto With NO Spark in reply to bisenberger, 06-09-2018 18:15:50  
If you have a black tape covered coil it could be the problem. If it is a red plastic coil it most likely is good. I just changed out a black taped one with a red one myself. As stated points get a coating on the pads that keep them grounding out to spark.



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old

06-10-2018 09:17:49




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 Re: Allis C Magneto With NO Spark in reply to bisenberger, 06-09-2018 18:15:50  
As on anything with points you stand a 90% chance the points are the problem when you do not have spark. Condensers do not go bad out of the clear blue and coils while they do go bad most of the time you can see oddity's in them when they go bad



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teddy52food

06-09-2018 20:06:17




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 Re: Allis C Magneto With NO Spark in reply to bisenberger, 06-09-2018 18:15:50  
I have a coil and condenser tester to check them. Also have a just like new mag on the shelf if you need it. I am in mid Mn. Where are you?



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Ted in NE-OH

06-09-2018 18:44:57




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 Re: Allis C Magneto With NO Spark in reply to bisenberger, 06-09-2018 18:15:50  
First thing to do is drag a piece of rough paper through the points, that fixed a lot of them, and is a common cause of no spark.



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