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JohnDeereJimOhio Long Time User
Joined: 03 Jul 2012 Posts: 981
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Posted: Wed Apr 10, 2013 8:24 am Post subject: 8n Electrical Issues |
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I found an 8n for 500 bucks in good shape. oweber
says he just spent around 750 in it re-doing
electrical and carb and some other things and his
wife said it has to go. He said it runs fine then
burns the coil out. He said its a 6v system. I think
I can buy it and sell it and make a few bucks for
some other projects but what do you think is wrong
with it? |
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Royse Tractor Guru
Joined: 17 Jan 2011 Posts: 15595 Location: Ionia County Michigan
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Posted: Wed Apr 10, 2013 8:30 am Post subject: Re: 8n Electrical Issues |
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Excessive coil current. If it is still 6 volt as he said, they may have left
the original ballast resistor (on the back of the dash) out of the circuit. |
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Bruce (VA) Tractor Guru
Joined: 24 Feb 2003 Posts: 16222 Location: Old Church VA
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Posted: Wed Apr 10, 2013 8:33 am Post subject: Re: 8n Electrical Issues |
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" He said it runs fine then
burns the coil out"
Front or side coil?
The most likely cause is leaving the key on.
If it has a front coil, the next likely cause is no ballast resistor or bypassing the ballast resistor.
Google 'wiring diagrams JMOR' and find the one that fits the tractor.
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JohnDeereJimOhio Long Time User
Joined: 03 Jul 2012 Posts: 981
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Posted: Wed Apr 10, 2013 8:36 am Post subject: Re: 8n Electrical Issues |
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At 500 is it a good deal? Decent metal.. Tires are all holding air but nothing special... |
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Randy-PA Regular
Joined: 19 Oct 2011 Posts: 68 Location: Waterford, Pa.
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Posted: Wed Apr 10, 2013 8:45 am Post subject: Re: 8n Electrical Issues |
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I would scoop that tractor up in a heartbeat!
Like others have already said: check the balast resistor
Last edited by Randy-PA on Wed Apr 10, 2013 8:53 am; edited 1 time in total |
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souNdguy Tractor Guru
Joined: 20 Aug 2002 Posts: 58306
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Posted: Wed Apr 10, 2013 9:36 am Post subject: Re: 8n Electrical Issues |
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if it's only issue is burning the coil out.. and it runs 'ok' and looks 'ok' then 500$ is awesome.
most liekly it is a wireing issue.
like coil is wired hot al the time.. not switched.. or if a front mount.. as said.. might not have the ballast ressitor.. if it is 12v.. may be wrong coil / resistor combo.
you can likely make 1000$ off it by buying at 500 and selling at 1500 and just checkignthe wireing and adding a coil or resistor.. net profit of maybee 950$ |
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JohnDeereJimOhio Long Time User
Joined: 03 Jul 2012 Posts: 981
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Posted: Wed Apr 10, 2013 9:49 am Post subject: Re: 8n Electrical Issues |
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Here is a pic of it
 |
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Bruce (VA) Tractor Guru
Joined: 24 Feb 2003 Posts: 16222 Location: Old Church VA
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Posted: Wed Apr 10, 2013 10:13 am Post subject: Re: 8n Electrical Issues |
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The tractor is well worth $500.
And you are doing the gentleman a favor; if he couldn't get it running after dropping $750 in it, you are saving him money & frustration.
For some folks, keeping an old tractor running would be like me trying to play golf.
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souNdguy Tractor Guru
Joined: 20 Aug 2002 Posts: 58306
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Posted: Wed Apr 10, 2013 11:02 am Post subject: Re: 8n Electrical Issues |
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it's a lil ugly.. but I'd have arm wrestled you .. and cheated. to win it for 500$
frankly.. for 500$.. if it ran and had no tin I'd have gotten it.. and i don't even particularly like N's.. :)
the engine alone is worth it. |
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HCooke Tractor Guru
Joined: 29 Sep 2006 Posts: 5262 Location: Missouri
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Posted: Wed Apr 10, 2013 3:29 pm Post subject: Re: 8n Electrical Issues |
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Yep, that's a good deal. Google 'JMOR Wiring diagrams' and you will find the wiring diagram for that tractor. |
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