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Allis Chalmers Discussion Forum
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magneto?

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got-2-many-tractors

03-23-2008 05:06:09




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Bought a 45" Allis-C. Started tinkering w/it yesterday (it"s got electric start)...initially, I had no spark....took cap off mag, filed rotor tip & cap stabs, put it back together & I got a weak spark....today, no spark. I haven"t fiddled much w/ magnetos. How do I go about finding out if I"ve got a good mag? Can I test it w/ the cap off by spinning the motor there-by being sure the problem is the cap/rotor? Thanks for help.

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chalmersbob

03-23-2008 19:08:30




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 Re: magneto? in reply to got-2-many-tractors, 03-23-2008 05:06:09  
clean the points with fine sandpaper(no emerycloth) this has always worked for me. they get a coating on them. Bob



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steve(ill)

03-23-2008 07:18:02




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 Re: magneto? in reply to got-2-many-tractors, 03-23-2008 05:06:09  
after cleaning the point, a new condenser will fix 50% of them, and a $50. coil wil fix the other 50%.



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David Maddux

03-23-2008 05:29:06




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 Re: magneto? in reply to got-2-many-tractors, 03-23-2008 05:06:09  
The way I test my mags, is to put mag in vise, take one wire put in mag and spark plug. Then I do this on a metal table that is grounded good to the vise, take a pair of visegrips, grip spark plug to table, the snap impulse and see if I have spark. Then check each hole. If I don't have spark, you can try cleaning points, then if I still don't have spark, she goes to the mag man.



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Brian Jasper co. Ia

03-23-2008 11:19:49




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 Re: magneto? in reply to David Maddux, 03-23-2008 05:29:06  
Get a new set of points and condenser. They're cheap and easily replaced.



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