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8N coil trouble I think.

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Dave's slow

06-04-2003 10:22:10




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First I'd like everyone to bear with me. I found this site around 2-3 in the mourning. Must have been half sleeping, because I thought I made a post and now I can't find it. Likely I still know where my tractor is because it won't start. I'm trying to look at the positive side or I'd be swearing up a storm right about now.

I just bought my 1947 8N about 6 months ago and because of one thing or another going bad (Currently bad shake in front wheels and now the starting problem.) I have been able to use it much. After buying it I put around 15 hours on it before my troubles started. While using the brush hog the 8N started stuttering like it was running out of gas' than it stopped and wouldn't start again. After basic trouble shooting, I found I wasn't getting any spark to the plugs etc. I also found a tar looking substance on the fan and plug wires. I than replaced the coil and it started right up. Five hours or so later The same thing happened, only this time no tar substanance was found. Check for spark and I don't have any. However, I don't want to put a new coil on until I find out what's causing them to go bad. Short in distributor???? 8N not very cost effecient at this rate. Any help would be greatly appreciated. Shake in front wheels next project. Steering box? Play in pitman arms. Thanks!! Please use words an under educated suburbanite will comprehend.

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Bruce(VA)

06-04-2003 12:11:39




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 Re: 8N coil trouble I think. in reply to Dave's slow, 06-04-2003 10:22:10  
In addition to what Danny & Dallas said.....if you did anything inside the distributor, double check your point gap (.15 by the book....I do .16) make sure the wire to the condenser is not grounding to the distibutor housing, and that the curly wire on the base of the coil is making solid contact with the distributor.



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Danny in CO

06-04-2003 10:38:00




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 Re: 8N coil trouble I think. in reply to Dave's slow, 06-04-2003 10:22:10  
Dave,

You will need a multimeter (volt/ohm meter) and check the voltage at the top of the coil with the points closed and switch on. You should get about 3.5 volts. My bet is that you will have more. My guess is that the ballast resistor has been bypassed. Trace the wire from the coil back behind the dash. There should be a terminal block with 3 posts. The ballast resistor should be connected between the top 2 posts and the wire from the coil should connect to one side and the wire from the other side should go to the switch.

This all assumes your tractor is still 6 volt positive ground. If not, post back.

Good luck,
Danny

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DallasGa

06-04-2003 10:56:25




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 Re: Re: 8N coil trouble I think. in reply to Danny in CO, 06-04-2003 10:38:00  
And if it is a 6V system,make sure the positive is the ground,they'll run with the battery inst.backward(neg.ground)but will eventually ruin the coil.You have obviously fallen victim to the new N owner curse,they don't like being traded and it's testing the new owner(you),to see hows gonna be in charge.Don't back down!Also get a copy of the service manual I&T FO-4.You'll be glad you did.



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dan

07-03-2003 05:23:54




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 Re: Re: Re: 8N coil trouble I think. in reply to DallasGa, 06-04-2003 10:56:25  
I'm having the same trouble new coil works good but don't last! I use a 12volt battery with 12 volt coil still same generator and resistor (new) battery stays charged ok. I think its installed with neg. grnd. could this also be the reason my coils burn out?????



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Claus

06-04-2003 14:19:33




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 Re: Re: Re: 8N coil trouble I think. in reply to DallasGa, 06-04-2003 10:56:25  
Coils do not care which way current goes through them right to left or left to right. One usually wants the coil minus to got to the points on a 12 negative system. This is because one would like the center electrode to be negative....because the center electrode gets hotter and therefore emits more electrons...This was a point in the weak Ford ignition system. This becomes a moot point in todays high energy system...
Happy Motoring
Claus
P.S. Where the heck is Dallas....
Claus The Rock/GA

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