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Ford 9N, 2N & 8N Discussion Forum
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8-n dist. no fire

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8-n Jerry

01-26-2008 18:32:40




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My neighbor put in new points, and condenser in his 8-n front mount. Now there"s no spark at points. I removed the distributor, and reset the point gap to .015 and reset the static timing per manual. I used a 6 volt battery, grounded the dist. and put 6 volts to the bolt that the coil touches, turned the base flange and no spark. I moved the 6 volts directly to the point connection and got a spark. Where did we lose the juice between the bolt and the points. Your help is appreciated. Jerry

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JMOR

01-29-2008 05:42:20




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 Re: 8-n dist. no fire in reply to Elvin C Frank, 01-26-2008 18:32:40  

8-n Jerry said: (quoted from post at 03:40:53 01/29/08) Gentlemen, once again I thank you for your quick replys, and to Sean for the pic which shows the missing piece of copper. Now, one last question and I'll leave you alone untill I have another problem. Is a new base plate in order, or can a piece of brass be fashioned and attached somehow to the brass screw? I gotta tell ya, you guys are the best, and I have learned a lot lurking here, so keep up the good work and hopefully some day I can join you in helping others fix their 8-N's. Best regards, 8-N Jerry


Make one from the strap off the old points or just use a piece of wire.

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8-n Jerry

01-28-2008 23:40:53




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 Re: 8-n dist. no fire in reply to 8-n Jerry, 01-26-2008 18:32:40  
Gentlemen, once again I thank you for your quick replys, and to Sean for the pic which shows the missing piece of copper. Now, one last question and I'll leave you alone untill I have another problem. Is a new base plate in order, or can a piece of brass be fashioned and attached somehow to the brass screw? I gotta tell ya, you guys are the best, and I have learned a lot lurking here, so keep up the good work and hopefully some day I can join you in helping others fix their 8-N's. Best regards, 8-N Jerry

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Sean (TX)

01-27-2008 14:38:29




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 Re: 8-n dist. no fire in reply to speedracing944, 01-26-2008 18:32:40  
Sounds like the copper strip is missing...

third party image



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8-n Jerry

01-27-2008 14:32:50




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 Re: 8-n dist. no fire in reply to 8-n Jerry, 01-26-2008 18:32:40  
Gentlemen, I thank you for your replys, However, I don't think I am conveying my thoughts correctly to you. The distributor is apart and on the bench. I am applying 6 volts directly to the brass screw that the coil normally touches to give the points it's shot of juice. No spark at points.. I move the 6 volts 1/2" to where the points connect via a screw and I have spark at the points. How does the spark travel from the brass screw to the points connection? Is there a flat piece of metal or small wire that connects the two together. If so, it is missing. I hope this makes sense. Regards, Jerry

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Dunk

01-27-2008 15:12:16




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 Re: 8-n dist. no fire in reply to 8-n Jerry, 01-27-2008 14:32:50  
Putting 6v where you are saying you put 6v, and if you had the points plate grounded, if you are talking 6v from your 150+ amp battery, should have welded your points together.

Not a good plan!!

Use an ohm meter.



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ZANE

01-27-2008 07:11:15




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 Re: 8-n dist. no fire in reply to 8-n Jerry, 01-26-2008 18:32:40  
You should not be putting straight six volts to the coil. By bypassing the resistor you are risking overheating and shorting out the coil. This may be why you are not getting "spark".

An Ohm meter or a test light in series with a battery is the best way to check for a short etc.

I just the other day put new points, condenser, rotor, coil, distribtor cap and spark plug wires on a front mount distributor. Checked to over good with an Ohm meter for shorts etc. Put it back in the tractor and hit the starter. It started right up and ran for about a minute and then quit. I took out a plug and laid it on the head and turned the engine over. No spark. I hooked up a volt meter to the top of the coil post and slowly turned the engine over while observing the volt meter. It did not fluctuate. Showed low voltage all the time. I then removed the distributor again and tested for a short. Sure enough I had a dead short. All looked good to a half blind 72 year old man. I took it out into the sunlighgt and looked at it real good and it is then that I discovered that the flat copper conductor from the coil/condenser recessed screw was just barely toughing one of the screws that hold the points to the distributor plate. Just a tiny tip of the conductor was protruding and was bent down so it could touch the screw. I used a small screwdriver to bend it back up out of the way and then rechecked for short and it was OK. Put is back on the engine and she fired right up and ran good for half an hour till I shut it off to do some more work on the tractor. The tractor was bought by a friend of mine and it is totally a wreck!
Why do I keep saying "yes" when I want to say no?????
Zane

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Den N Ms

01-26-2008 19:11:17




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 Re: 8-n dist. no fire in reply to 8-n Jerry, 01-26-2008 18:32:40  
8-n Jerry,It sounds like the little copper jumper that goes between the brass screw and the points has been lost.Check and see if its in there.6 volts hooked up like you had it is a dead short to the points.Check the points and dress them up if you arced them.Clean them with a piece of clean white paper or piece of grocery sack.to test for spark put in the rotor,cap and the coil then hook up your wires pos + to the distributor and the neg- too the top of the coil.Old plug wire and plug vice gripped to the distributor case.Hook the plug wire to the distributor cap.Hook up the wire to the top of the coil and turn the distributor shaft.You should have spark at the plug. Don't leave the wire connected the the coil over a minute or two as it could fry the coil if its left on to long.

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old

01-26-2008 18:51:09




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 Re: 8-n dist. no fire in reply to 8-n Jerry, 01-26-2008 18:32:40  
Common for new points to have oil on them. Clean the points and see what happens. I have seen that happen so many times it hurts



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Matt Malcome

01-26-2008 19:22:52




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 Re: 8-n dist. no fire in reply to old, 01-26-2008 18:51:09  
Got me for the first time last year, had the distributor out so many times, I felt like it should be a "timed" competition. A little double sided sand paper, and a quick bench continuity test, and volia!! running tractor. I will bench test all of them from now on.



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Bruce (VA)

01-26-2008 18:41:57




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 Re: 8-n dist. no fire in reply to 8-n Jerry, 01-26-2008 18:32:40  
The pigtail is probably not touching the brass screw. Remove the coil & stretch the pigtail a bit. If that does not work, remove the distributor. With the distributor still off the tractor, install the coil. Test for continuity from the top of the coil to the points. If you do not have continuity, stretch the pigtail a bit until you do.

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