Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo Auction Link (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Ford 9N, 2N & 8N Discussion Forum
Order Ford 8N Parts Online

8n .....no spark

Welcome Guest, Log in or Register
Author 
Phil SO.IL.

11-08-2004 13:39:58




Report to Moderator

have an 8n, 6 volt front mount distributor was running but had a weak spark .now no spark and when i checked voltage at coil and rotated engine voltage stayed at 6+ as if the points were not closing.pulled distributor cap rotated engine and points opened and closed.wondering what i should check next.any help will be appreciated.




[Log in to Reply]   [No Email]
Fast Ed Ohio

11-09-2004 22:41:39




Report to Moderator
 Re: 8n .....no spark in reply to Phil SO.IL., 11-08-2004 13:39:58  
Phil so il , your points are bad, replace them , Its a 5 minute job to remove the dist. on a front mount ( 2 half inch bolts) and it falls in your hand, new points must be set at 15 thow for proper gap, you do have a repair manual ? Im thinking you need one bad .



[Log in to Reply]  [No Email]
Ramrod

11-08-2004 14:15:01




Report to Moderator
 Re: 8n .....no spark in reply to Phil SO.IL., 11-08-2004 13:39:58  
If you put your volt meter across the coil (red on + and black on -) and saw 6v all the time, that would mean the points were stuck. That circuit is completed only when the points are closed, and when they open again, it forces the coil to fire. You may not be able to see the points open with a volt meter, but you may see a flicker as the points bounce. They will be closed most of the time, only opening when the coil is firing. You could use your ohm meter to check the internal windings on the coil, put one lead on the + and one lead on the -, it should read almost like you put the two leads together and shorted them out, as the coil is just like a long piece of wire. This is kinda advanced testing, and requires a bit of comfort factor with a VOM (Volt Ohm Meter), so if this is too geeky, we can make it simpler.

Ramrod

[Log in to Reply]  [No Email]
Phil SO.IL.

11-08-2004 15:09:37




Report to Moderator
 Re: 8n .....no spark in reply to Ramrod, 11-08-2004 14:15:01  
if the + and - you are refering to is the stud and the pigtail it is reading .6 on my multimeter



[Log in to Reply]  [No Email]
KenM

11-09-2004 14:04:13




Report to Moderator
 Re: 8n .....no spark in reply to Phil SO.IL., 11-08-2004 15:09:37  
Check your condenser.



[Log in to Reply]  [No Email]
Ramrod

11-09-2004 13:51:55




Report to Moderator
 Re: 8n .....no spark in reply to Phil SO.IL., 11-08-2004 15:09:37  
Let's use the Ohm Meter setting. Disconnect the wires from the two small posts on the coil. Set up the meter so that when you touch the leads together the needle swings all the way over indicating a short. Now, put one lead on the + and one lead on the -. If the needle swings way over, but not quite as far, the coil is probably good. Now put it all back together and set the meter to read volts. Put the red wire to ground on the tractor, and touch the black wire to the negative post on the battery. The meter should read 6 volts if you have a positive ground system as I think these older N's do. Now turn on the ignition and move the black lead to the - post on the coil. It should read 6 volts again, indicating a good ignition circuit. If all this is good, I would suspect the points. They will switch the ground on and off to the other side of the coil when they operate, causing a big spark to jump out of the coil to the distributor cap.

Let me know how this works out.

[Log in to Reply]  [No Email]
Phil SO IL

11-09-2004 17:15:32




Report to Moderator
 Re: 8n .....no spark in reply to Ramrod, 11-09-2004 13:51:55  
ram i have a 6 volt front mount there is only one post i appreaciate the help but i think we are on different pages. i was wondering about the condenser and its part in the whole picture



[Log in to Reply]  [No Email]
Ramrod

11-10-2004 05:03:05




Report to Moderator
 Re: 8n .....no spark in reply to Phil SO IL, 11-09-2004 17:15:32  
Sorry if I misled you, I'm surprised that nobody else has jumped in to help. The condenser acts to keep the points from burning up, reduces sparking as they open and close. It would probably run fine without the condenser for a while anyhow.



[Log in to Reply]  [No Email]
souNdguy

11-10-2004 05:52:36




Report to Moderator
 Re: 8n .....no spark in reply to Ramrod, 11-10-2004 05:03:05  
That condensor is a good switch debouncer... I've seen points burn in minutes without a cap.

The easiest way for him to check his front mount points is to remove the coil, and then use his ohm meter on the points screw head where the pig tail touches, and measure to ground.. rotate engine by hand.. that will show the points open and close.. My guess is he has bad or coroded/dirty points..

Soundguy

[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums


Copyright © 1997-2023 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy