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Ford 9N, 2N & 8N Discussion Forum
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SPARK/DISTRIBUTOR/COIL PROBLEM

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BOB G (TEXAS)

01-17-2004 14:51:28




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I need help. I have been working on the problem for two weeks and I can't get it resolved. I have a 9N front mount with a twelve volt conversion. I can't get any spark at the plugs. I have replaced most ignition items and checked and rechecked everything but I still don't understand what is causing the problem. 1) Since this problem has started, I have replaced the coil. How can I determine if my new coil is bad? I get about 4 to 6 volts at the post at the top of the coil, with the resistor in line, but when I turn my fan or move the rear wheels the voltmeter reading doesn't change. My understanding is that it should change and go up to 12 volts, but it doesn't. Does this tell anyone what the problem might be?
The points seem to be working correctly and the two thingys on the coil seem to have contact with the distributor. The rotor turns when the engine is cranked.
2) Would a bad condenser cause this problem?
3) There is some relationship between the position of the gear shift and the tractor's ability to start. I just replaced my
starter drive because it busted-up. Could something be wrong with the push button? Is it suppose to ground something when it is pushed in that then allows the tractor to start? When is push the button, the starter cranks the engine real good.

I would greatly appreciate any help that I can get because I really don't know what to do next other than maybe buy a new coil.

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Tripcrown

01-18-2004 00:58:45




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 Re: SPARK/DISTRIBUTOR/COIL PROBLEM in reply to BOB G (TEXAS), 01-17-2004 14:51:28  
I just got done fixing a similar problem with my 12v Massey 65. It turned out to be a bad ammeter. It had a direct short in it. Replaced it and she started right up. Hope this helps.



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Gary

01-17-2004 17:25:03




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 Re: SPARK/DISTRIBUTOR/COIL PROBLEM in reply to BOB G (TEXAS), 01-17-2004 14:51:28  
Just take the dist. off the tractor completly. See what way the rotor is pointing first in order to reinstall it back again. It will only go on one way, however, will be close enough to cause trouble the other of two ways. Take to work bench and look over the points and ect. right in front of you. It is almost impossible to change those points in the tractor.
If you are sure points are ok and still have a problem, change the condenser. it is the cheepest place to start.
There has been some bad coils out there also. Is yours a black one or a brown one? You need a resistor only with the black one. The brown is to have a resistor built right in it, therefore not needing one external. Throw the brown one away. I have had alot of problems with it.
Try by-passing the external resistor. it won't hurt to run it a short while to see if that might be your problem. Also be sure to run solid core spark plug wires. The "radio resistant" wires sold at auto parts houses will not work as good. Also don't use champion plugs. For some reason I cant keep them running in an old gas tractor.
The 8N and 9N's can be tempermental at times. It just takes the right touch to make it a great little tractor. you almost need to understand it like your wife if you know what I mean.
I've gotten alot of them old things running, so, e-mail me back if you have not got it going after all this. Gary

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BillM-OH

01-17-2004 19:08:34




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 Re: Re: SPARK/DISTRIBUTOR/COIL PROBLEM in reply to Gary, 01-17-2004 17:25:03  
Bob - either your points are staying closed or you have a short in the points circuit somewhere. Take your distributor off, Get out your VOA meter (just bought a digital one at Big Lots for $4.95 -- couldn't resist - works too) and check the entire circuit for grounding. Something is touching somewhere where it shouldn't or it's the condenser.
Don't give up -- Good luck!!!!



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8n northtexas

01-17-2004 16:59:08




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 Re: SPARK/DISTRIBUTOR/COIL PROBLEM in reply to BOB G (TEXAS), 01-17-2004 14:51:28  
Hello Bob I had this with mine 8n once and like to never figured it out. Yes it was a short to ground. What it wound up to be was where the coil spring sets on the screw in the distributor. The little plastic insulator was bad. That the screw that holds the copper strap on then hooks to the points. Couldn't find a replacement so wound up using the little square insert that holds your license plate on. You can find them at most auto parts house. They have all sizes so you should find one that will just fit. Hope this helps..... .

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Bruce (VA)

01-17-2004 16:42:33




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 Re: SPARK/DISTRIBUTOR/COIL PROBLEM in reply to BOB G (TEXAS), 01-17-2004 14:51:28  
One good thing about a frontmount is that you can take it over to the neighbors house for a second opinion! That's what I did the first time I put points in mine, and he quickly noticed that the wire from the condenser was close enough to the casing that it could possibly arc & short out. Check for a ground in the distributor from the condenser wire.



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raytasch

01-17-2004 15:26:07




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 Re: SPARK/DISTRIBUTOR/COIL PROBLEM in reply to BOB G (TEXAS), 01-17-2004 14:51:28  
Bob, If I read this right, and if your voltage reading at the coil remains the same when you turn the engine over your points are not opening or you have a short to ground at the distributor. Yes, a shorted capacitor can cause this. If your distributor was working right you would see 12 volts at the coil when the points open. Again, you have a short to ground somewhere and my guess within the distributor. Good luck, .
ray

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BOB G (TEXAS)

01-17-2004 15:30:14




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 Re: Re: SPARK/DISTRIBUTOR/COIL PROBLEM in reply to raytasch, 01-17-2004 15:26:07  
THANKS! You are pointing me in the right direction. I am not a mechanic so would you please tell me what a short to ground is? Does that me maybe I have a bare wire somewhere within the distributor touching metal?



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raytasch

01-17-2004 15:42:21




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 Re: Re: Re: SPARK/DISTRIBUTOR/COIL PROBLEM in reply to BOB G (TEXAS), 01-17-2004 15:30:14  
Bob, A short to ground is what the points do when they close. When the points open you should read 12v at the coil. First thing I would do is remove the condenser leed and see if you get your 12v when the points open. If the condenser is shorted it would be getting warm when the ignition is on. Next make sure the points are really opening. At this time, I would pull the distributor, take it to a nice warm work area and troubleshoot it. If you have an ohm meter section of your meter we can figure out what is going on. I'll be around for a while yet.
ray

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stacie

02-14-2004 14:41:02




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 Re: Re: Re: Re: SPARK/DISTRIBUTOR/COIL PROBLEM in reply to raytasch, 01-17-2004 15:42:21  
ray

I am wonering if my coil is shot. I am getting readings of 9.26 when I test the side and centre and then 1.2 on both sides. Can you tell me if this is the problem

Stacie



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