8n wont stare

/ 8n wont stare #1  

Bandit2026

Bronze Member
Joined
Dec 22, 2014
Messages
55
Location
Ferrum, VA
Tractor
Ford 8N, Kioti CK35
Starting a slow restore of my 8n not for show just a good cleanup. Was getting where it would miss a lick once in a while so I got a tractor supply tune up kit. Installed and fired right up all was good. After about 2 mos of very cold storage she would not fire. Getting fire to front mount coil top and bottom , checked and cleaned points still no fire to the plugs. Any Ideas??
 
/ 8n wont stare #2  
Could be a bad coil that has cracked internally causing the secondary winding (spark side) to open due to the cold. Seems you have replaced everything else, good luck.
 
/ 8n wont stare
  • Thread Starter
#3  
Could be a bad coil that has cracked internally causing the secondary winding (spark side) to open due to the cold. Seems you have replaced everything else, good luck.

thanks That sounds like a great possibility as it got down to about 9 degrees a couple of times.
 
/ 8n wont stare #4  
After about 2 mos of very cold storage she would not fire. Getting fire to front mount coil top and bottom , checked and cleaned points still no fire to the plugs. Any Ideas??

Please pull one of the spark plugs and verify you are getting blue/white sparkies or invest in spark tester shown below that will also provide spark intensity.

tester.jpg
 
/ 8n wont stare
  • Thread Starter
#5  
I've tested it with plug in and plug out grounded to block and nothing.
 
/ 8n wont stare #7  
Do you have a link showing where that tester can be purchased ? All I can find is the pen type that show if there is a spark, or not. I would prefer one that actually shows how strong the spark is like you posted, but cann,t find it.


Please pull one of the spark plugs and verify you are getting blue/white sparkies or invest in spark tester shown below that will also provide spark intensity.

View attachment 539349
 
/ 8n wont stare #8  
Auto craft tester at advance auto parts for 8.99, came up when i googled it.
 
/ 8n wont stare #10  
Have you changed the condenser, they used to always be included in the kits, now they aren't. A bad condenser will drive you up a wall trouble shooting ignitions.
 
/ 8n wont stare
  • Thread Starter
#11  
Thanks to all those that replied. I have a new coil in hand and will try that tomorrow. Lou I'm thinking like you if the coil doesn't do the trick I'll try the condenser. After installing the points with new plugs and condenser it fired up so quick it scared me. Ran great for about an hour then was put in the barn and sat for 2 months and hasn't fired since.
 
/ 8n wont stare #12  
I'd also clean the points (even though they are new).
 
/ 8n wont stare #13  
Even though the points are new does not mean they are good. In the least check the gap and clean.
 
/ 8n wont stare #15  
Thanks to all those that replied. I have a new coil in hand and will try that tomorrow. Lou I'm thinking like you if the coil doesn't do the trick I'll try the condenser.

Whoa up there Bandit! Don't start replacing parts willy nilly to attempt repair - You'll likely wind up more frustrated and poorer.

Next bit of info I need from you is your tractor a front or side mount distributor. Reason I asked is the troubleshooting steps will vary slightly.

For future reference, when asking for electrical or ignition help please state right up front if you have a front or side mount distributor.

K7LN gave you good tips if you have a side mount distributor. Post back if it's a front mount and I'll walk you through troubleshooting that platform.

"Ran great for about an hour then was put in the barn and sat for 2 months and hasn't fired since." that statement alone is a classic symptom of corrosion on the points. Re-check the point gap (.015-Front or .025-Side Mount) on all four lobes then run a clean piece of card stock or heavy paper through the points to clean away any corrosion.
 
/ 8n wont stare
  • Thread Starter
#16  
If you read the first post it plainly states "front mount coil" I have checked, cleaned and rechecked gap on points at least 3-4 times. As far as checking spark , put a screw driver in the boot hold near block, crank over engine. Blue spark, good, yellow spark, weak no spark well you get the idea. Works on lawn mowers and log trucks. Its was parked in the same barn for well over 30 years and no corrosion in past. Something died on it while was setting still. With new parts in the ignition I'm stumped.
 
/ 8n wont stare #17  
If you read the first post it plainly states "front mount coil" Just to be clear, all N tractor coils were mounted on the front. I was asking where the distributor is located? You do know what happens when you assume....

So your last post infers that you have a front mount distributor. If so, perhaps the following will help you figure out your tractor's problem.

The most common electrical failure points with front mount distributors are:
1. The insulator under the brass concave head screw.
2. The insulator at the end of the points where the copper strip attaches.
3. The copper strip is broken or grounded to the plate.
4. The condenser wire grounding.
5. The pigtail/tab not making contact.
6. Incorrect positioning of the spring clip on the plate causing the pigtail to ground.
7. Incorrect seating of the coil on the distributor due to a loose bail or no gasket; the coil must not move at all.
8. Water/moisture inside the cap due to gasket failure or the absence of a gasket.
9. Dirty/corroded/incorrectly gapped points
10. Burned rotor, cracked/carbon tracked cap.

Pull the distributor and do a continuity check at each point below:
1. Coil off, cap off, points open. One probe on the brass screw & the other on both sides of the open points. On the side closest to the center you should have continuity and open on the other side. If the other side has continuity, the points are grounded.
2. Coil off, cap off, points open. One probe on the brass screw & the other anywhere on the body of the distributor. You should have no continuity - Rotate the tang on the distributor as the points open & close. You have continuity when closed and lose it when they open.
3. Coil on, cap off, points open. One probe on the lead on the top of the coil, the other on the cam side of the open points. You should have continuity!
4. Coil on, cap off, points open. One probe on the lead on the top of the coil, the other anywhere on the body of the distributor. You should have no continuity.
 
/ 8n wont stare
  • Thread Starter
#18  
Well finally something that makes sense. and is understandable. Right now I have a terrible chest cold and its raining which makes the unheated man cave a little uncomfortable. Good part is I have a CK35 for the heavy lifting. Dollar Bill I promise I'll put that plan into motion soon as I feel better.
 
 
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