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9N electrical problem...still

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9N Chuck in MO

05-05-2001 15:11:55




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After deciding to not shoot her or let her roll down into the pond, I have rebuilt the entire distributor, new cap, new coil and still no spark to the plugs. Today, with my new voltage meter in hand, I find that I have 12 volts going to the coil. I know this is too much, but what befuddles me is that I ran and used this tractor, wired like it is, all last year and it ran great. It was converted to 12 volt long before I got her. Last year when she wouldn't start, I rewired the entire tractor (last Spring) before I figured out that it was the carb(which is also new) Today, I pulled a plug, attached to the new spark plug wire and held it against the block and I have no spark. Will 12 volts going into the coil keep it from sparking, until the coil burns up or will the coil fry right away? I have heard there may be a 6 and also a 12 volt coil and I don't know which one I have purchased recently. As I didn't know there might be two, I didn't specify which I would want. The distributor is a front mount. I am almost out of my skull trying to figure this out, any help will be greatly appreciated. Thanks, Chuck

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Den in Den

05-06-2001 10:53:11




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 Re: 9N electrical problem...still in reply to 9N Chuck in MO, 05-05-2001 15:11:55  
It would be normal to see 12 volts at the coil if the points are open. Close the points and what is your voltage? Should be around 3.5 for the six volt coil. I had to go with two ballast resistor in series to get mine to run last summer and it has run great since with 3.5 volts at the coil.
Good Luck
Dennis



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gary

05-06-2001 05:58:33




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 Re: 9N electrical problem...still in reply to 9N Chuck in MO, 05-05-2001 15:11:55  
Can you short between the coil terminals and produce a spark at the points? Assuming that you are not getting spark at points. Also check the little insulator which the wire passes thru the distributor body (this gave me a similar rage once). I guess you've already checked the rotor and wires. Good luck



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Chuck

05-07-2001 09:45:49




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 Re: Re: 9N electrical problem...still in reply to gary, 05-06-2001 05:58:33  
Shorting between the coil terminals?, do you mean, putting the coil wire right on the condensor screw in the (front mount) distributor? Also, I am not sure what little insulator you mean. I have checked the condensor lead and the the points and I am not shorting out inside the distributor. I think I have 12 volts going to my brand new 6 volt coil and I think it is probably fried. What do you think? Thanks, Chuck

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Dell (WA)

05-05-2001 16:00:29




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 Re: 9N electrical problem...still in reply to 9N Chuck in MO, 05-05-2001 15:11:55  
Chuck..... ...do you always read 12 volts at the coil? Points open? Points closed?

My bet is you have a 6 volt coil, that requires about 3.5 volts (2.5 min, 4.0 max). The reason I think it is a 6 volt coil is 2 fold, 1) you have to argue with your part person that there is such a thing as a 12 volt coil and 2) most parts emporiums don't carry a 12 volt frontmount coil anyways.

Real 12 volts on a 6 volt coil will fry it toote-sweete. (probably less than a minute).

And no, I don't know of any eazy shadetree mechanic check for a bad ignition coil except by replacement. Well, yeah, you could check the primary for continuity with a ohm meter off the tractor, but that will only prove the primary winding is continious or not. If it is not continious, then obviously it is bad, otherwize, ya still don't know.

I suggest that you make up your mind that your ignition coil is bad, (not what you wanted to hear, I'm sure) decide which kind of coil scheme you want and start over and do it right this time. ..... ...Dell

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