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Ford 9N, 2N & 8N Discussion Forum

Figure this one out.

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old

02-14-2006 13:23:39

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8N ford front mount, 6 volt system. It will run and start if I put a 12 volt battery in it but if I swithc it to 6 volt when its running by useing jumper cables it runs rough and dies. Leave the 12 volt battery in and it runs good. Coil isn't very old and the points and condenser aren't very old either. Set the 6 volt battery on and it starts to smoke black smoke. I'm thniking maybe carb problems and the 12 votls is just give enough more spark to burn the extra gas. What say you guys??
Thanks

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jojo

02-15-2006 18:47:46

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Re: Figure this one out. in reply to old, 02-14-2006 13:23:39

Last summer I had the same problem with a 2N, only mine would have to be boosted with 12V to get it started, it would run on 6V. I put all new wires from the battery to the coil, now it starts in the winter, and runs on 6V. I sand blasted the resistor and ampmeter, new switch.

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souNdguy

02-15-2006 12:54:12

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Re: Figure this one out. in reply to old, 02-14-2006 13:23:39

Try running a jumper wire right from the battery to the coil.. might have bad connection somewhere... I'd check the connections under the coil,and also take a look back to see if the point gap isn't huge.. or closed up, and thus burning.. and plug condition. gap as well as contamination level.. heck.. check rotor.. might have tip broke off!.. I've seen that before.

Might be a good time to check ground cable connection at frame too.

Soundguy

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old

02-15-2006 13:40:45

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Re: Figure this one out. in reply to souNdguy, 02-15-2006 12:54:12

Sounds thats the problem I have done all that and it still will not run unless I use the 12 volt battery. I'm just about to say to heck with it and switch it over to 12 volts and be done with it LOL

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souNdguy

02-15-2006 16:17:40

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Re: Figure this one out. in reply to old, 02-15-2006 13:40:45

You don't have a spare front mount tractor that you can swap the distrib and plugs over from do ya?

Soundguy

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old

02-15-2006 16:54:14

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Re: Figure this one out. in reply to souNdguy, 02-15-2006 16:17:40

Done did that already LOL. It keeps it up and keeps makeing me mad it will end up being sold a piece at a time. I'm begianing to hate front mount Ns. Never have any problem with my side mount one but always trouble with the front mounts.

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tim in pa

02-15-2006 11:16:44

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Re: Figure this one out. in reply to old, 02-14-2006 13:23:39

first guess is 12 v coil?!? second guess would be a partial short (low resistance) to ground. check condenser, maybe that insulator in there. try running in the dark, at night and look for sparkng/arcing somewhere. does ammeter show more negative current when starting?

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old

02-15-2006 11:30:42

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Re: Figure this one out. in reply to tim in pa, 02-15-2006 11:16:44

Well this tractor ran fine 2 month ago on 6 volts and always started thats why I'm tring to figure it out. My guess is the points have correded up some and the 12 volts has the extra power to make them work where as the 6 volts doersn't

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Hobo,NC

02-14-2006 17:57:42

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Re: Figure this one out. in reply to old, 02-14-2006 13:23:39

i had one that wuz hooked up neg. ground and run bad till I switched it back to pos. ground. If you still got the old coil I would modifi it to take a external coil.

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old

02-14-2006 18:12:58

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Re: Figure this one out. in reply to Hobo,NC, 02-14-2006 17:57:42

Well thats the problem its still 6 volt + ground, I also when I put the 12 volt battery in to start it hooked it up + ground. Then I hooked up the jumper cables to the 6 volt battery and unhooked the 12 volt battery and it ran badly till I hooked back up to the 12 volts battery. Had black smoke like it was running rich and no power. With the 12 volts it had little or no smoke and had pwoer. I guess tomorrow I'll pull the dist off and chech the points and see if they slipped again or have correded from sitting the last 2 months. Opened up the carb and checked the float and needle and all seemed good there. I'll get it worked out and if I don't I'll just part this one out also. Got a 9N that I'm parting out so one more I guess will not hurt LOL

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JimNC

02-14-2006 15:52:35

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Re: Figure this one out. in reply to old, 02-14-2006 13:23:39

I had about the same problem with my side mount 12v 8N. Went through and checked everything, cleaned carb, checked spark, cleaned and adj. points, checked for sticking valves. The only parts I had on hand after getting frustrated with it were a set of plugs, put them in and it ran like a champ. Mind you I had checked the plugs and had good spark.

Jim

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old

02-14-2006 17:05:44

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Re: Figure this one out. in reply to JimNC, 02-14-2006 15:52:35

Whats funnyabout this one is that it was running good when it was put in the shed 2 or 3 months ago and now well it just plain doesn't want to run on 6 volt but does with 12 volts which isn't right

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duey

02-14-2006 21:10:13

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Re: Figure this one out. in reply to old, 02-14-2006 17:05:44

Oh, Ho!!!! One MORE reason to convert to the deadly 12 volt system!!!!! It's not just for accessories anymore... (I love my 12volt!!) :-) duey

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old

02-14-2006 21:22:49

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Re: Figure this one out. in reply to duey, 02-14-2006 21:10:13

If it was one that I was going to keep/use I probably would change it over to 12 volts but this is one I have for sale. If it had run right last week I probably wouldn't have it today.

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Scott(Ks.)

02-14-2006 15:31:33

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Re: Figure this one out. in reply to old, 02-14-2006 13:23:39

My 51 did almost the exact thing. I changed just about everthing up to and almost the distributor. After I priced a distributor, I came back home and got me a can of electrical contact cleaner and a piece of emery cloth. I took off every electrical connection on that tractor, shined them all with the cloth, sprayed them with cleaner then tighened them down well. Particulary the battery cables, the wires to and from the distributor, generator, starter and especially the hidden ballast resistor. One of those things did the trick and it runs well now.
When it was giving me problems, it would just die, then wouldn't start with 6 volt. It would start again if I jumped it with 12 volts.

CLEAN! BRIGHT! TIGHT! I think I read that somewhere before. It worked for me.

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K.LaRue-VA

02-14-2006 14:37:07

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Re: Figure this one out. in reply to old, 02-14-2006 13:23:39

Sounds like the old tight and shiny thing with any 6-volt system. You might be right about the 12-volt battery giving you a hotter spark but if it's a 6-volt system with the proper resistance your coil wont last long running with a 12-volt battery.

You might try hot wiring around your quote WEAK SISTER unquote ignition switch adn see if teh problem goes away.

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MikeT

02-14-2006 14:05:42

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Re: Figure this one out. in reply to old, 02-14-2006 13:23:39

Did you check the color of the spark at the plugs?

It may have to much resistance in the ignition circuit for 6V. Or, maybe it just has a 12V coil.

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old

02-14-2006 14:08:47

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Re: Figure this one out. in reply to MikeT, 02-14-2006 14:05:42

Coil is 6 volt, put it there may self this summer/fall.

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