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Ford 9N, 2N & 8N Discussion Board

Re: Electronic Ignition starting problem

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Posted by HeyObie on November 28, 2012 at 13:42:11 from (

In Reply to: Electronic Ignition starting problem posted by HeyObie on November 24, 2012 at 09:13:12:


Had to put it down for a few days.

Just a recap of the story and where I am.

The problem was that the 49 8N would start, but then would not restart if I turned it off. Once it sat for a few hours, it would restart.

It has an EI and 6V. I learned that the coil was grounded to the front of the engine and that is not proper and most likely my coil is shot because it needed to run through the ballast resistor to protect it.

So I installed a new coil and reworked the wiring so that it went through the ballast resistor. After I did this, I could not get the 8N to fire. Maybe one cylinder, but it just wouldn't go.

So yesterday, I undid my work. I put the old coil back on and grounded to the front of the 8N to see if I could get my tractor back to working. I also redid all the grounds. Took things apart, grounded off paint and rust. Put dielectric grease on and reassembled.

Tried to start the redbelly back up and it wasn't too happy. I turned the fuel off and it seemed to start to respond. So it finally started with the fuel off (I have put two carbs on it with the same results).

So I pulled the plugs (they were 437's which is the right plug) to see what was up. They were wet and black. I checked the gap. The specs call for .025 and these were gapped to .035-.040. I also noticed how poorly the previous owner had put on the piece that goes between the plug wire and the plug. A horrible job. The copper was just floating in the air. I gave these some love and reworked them.

Between the wrong gap and the poor connections, these plugs were not happy. Anyway, I fired it up to test my work and KABAM! One happy 8N. It fires like an old man who just got a new pacemaker. It really starts hard. Pulled a plug and it looks perfect

So tomorrow, I am going to put the NEW coil on and the ground wire that runs through the ballast resistor to see if I can hook it up the way it is supposed to be. Stay tuned. Maybe I should just leave it alone?


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