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Allis Chalmers Discussion Forum
Show Parts for Model:

no spark on WD

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Billy_The_Kid

07-24-2014 19:37:04
166.137.101.170



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Running a fm x series mag. New points, plugs, New dist cap, rotor. Number 1 not firing. No. 4 fires most of time. Plug wires okay. And ideas??? Checked all cylinders with same plug wire. Any suggestions?




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chalmersbob

07-25-2014 20:06:17
64.12.116.205



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 Re: no spark on WD in reply to Billy_The_Kid, 07-24-2014 19:37:04  
you put in new points but did you clean them Bob



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tractorguy2

07-25-2014 07:26:20
64.147.36.71



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 Re: no spark on WD in reply to Billy_The_Kid, 07-24-2014 19:37:04  
You should replace your wires with new copper core wires and use non resister spark plugs.



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Billy_The_Kid

07-25-2014 07:42:22
24.213.19.11



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 Re: no spark on WD in reply to tractorguy2, 07-25-2014 07:26:20  
Tractorguy2, yes, already checked this possibility: one plug wire moved around the distributor cap with sparky grounded on frame. Good spark on #2, #3, some on #4, nothing on #1. Same good copper wire, same good spark plug. So it's definitely not the wire or the plug. As posted earlier, I will double check continuity of new distributor cap this evening. Assuming it's good, the problem HAS to be in the magneto.... Or as Stu ON has emailed me, #1 and #4 are on the same cam, so it could be a bad cam on the mag shaft. Lots of checking to still do.

Thanks,

Billy
This post was edited by Billy_The_Kid at 07:44:08 07/25/14.

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Billpa

07-25-2014 05:28:05
68.80.232.3



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 Re: no spark on WD in reply to Billy_The_Kid, 07-24-2014 19:37:04  
Billy , new cap doesn't rule out bad cap



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Billy_The_Kid

07-25-2014 05:54:28
24.213.19.11



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 Re: no spark on WD in reply to Billpa, 07-25-2014 05:28:05  
Quoting Removed, click Modern View to see

Roger that. I will run a continuity test on the cap tonight after work.



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Billy_The_Kid

07-26-2014 08:03:55
198.228.228.172



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 Re: no spark on WD in reply to Billy_The_Kid, 07-25-2014 05:54:28  
Quoting Removed, click Modern View to see

Continuity and ohm test indicate no problem with cap.

In searching old threads the mag only shuts spark to one cyl under rare circumstances. I am now leaning toward a points alignment issue. Any other thoughts welcome.



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Billy_The_Kid

07-28-2014 05:49:21
24.213.19.11



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 Re: no spark on WD in reply to Billy_The_Kid, 07-26-2014 08:03:55  
Getting back to everyone who helped me out. The problem turned out to be points that were not adjusted EXACTLY. They were approximately .28 instead of .20. Once I got the points gapped properly, it started running just fine.

The mag is producing lots of spark. After I got the points adjusted right, I held the #1 wire in my hand with spark plug grounded to the frame. WOOOOOOWWWW!!!!! My entire arm will attest to excellent spark! lol

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Billpa

07-25-2014 06:00:42
68.80.232.3



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 Re: no spark on WD in reply to Billy_The_Kid, 07-25-2014 05:54:28  
Billy , let me know how you make out !!!



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Billy_The_Kid

07-25-2014 06:23:01
24.213.19.11



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 Re: no spark on WD in reply to Billpa, 07-25-2014 06:00:42  
Billpa, I will post the results of my test tonight. But two different caps have the same problem with #1, so I'm thinking it's not really a cap issue.

A possible easy fix for this problem is switch out the magneto for a coil/distributor ignition I have. (See new thread I just started.)



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old

07-24-2014 20:44:51
209.86.226.11



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 Re: no spark on WD in reply to Billy_The_Kid, 07-24-2014 19:37:04  
Send me an e-mail I I can then send you a manual for that mag that may help you



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Ralphwd45

07-25-2014 00:09:37
216.227.104.79



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 Re: no spark on WD in reply to old, 07-24-2014 20:44:51  
Old! It's good to see you back! You always were good to offer help, I see you still are! Cheers, Ralph.



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old

07-25-2014 07:22:41
209.86.226.40



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 Re: no spark on WD in reply to Ralphwd45, 07-25-2014 00:09:37  
Helping others and getting help when I need it is why I am on Y-T



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