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8n, 12volt Front distributor No power, quits after 20min

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SoccerTopher
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PostPosted: Mon Aug 19, 2019 8:59 am    Post subject: Re: 8n, 12volt Front distributor No power, quits after 20min Reply to specific post Reply with quote

Had a lot of rain this weekend, so my time messing around with it was shortened.

Does it run now yes, is running great no, just ok.

What I did so far:

I think the biggest problem was the double resistors. I removed the coil and measured the resistance at 3.1 ohms. Tested the ceramic resistor I had and it measured 1ohm so I disconnected the #A8nn12250A terminal block resistor. (I didn't like the connection to the wonky fiber core resistor). I'm now only using the 1-ohm white resistor #8ne10306. The tractor started and ran ok until a load is placed on it then it would stumble. The big difference is that it stayed running once hot. It ran for 45 mins steady with no problem. So I think once the dual resistors started to heat up, it was causing my stalling which was making me think it was a fuel issue.

Since I had already purchased the Electronic ignition I figured nothing to lose so I installed it. Once installed the tractor started and ran just like when I had points installed, but the lack of power, when given a load, has not been fixed. The tractor starts at the push of the button, idles at low and middle RPM. Once I get to the High RPM you can hear the motor start to skip a bit. It doesn't backfire or blows smoke, it just a skip every so often.
If I let the clutch out slowly the tractor will move and run fine when I approach a hill or any load the governer will start to move and that's when she will start to stumble and quit if it's to much load. If I jump on the clutch quick I can keep it from stalling and if it does stall it will fire right back up.

I've attached a video of it stumbling for everyone amusement. Just not sure where to go from here now.

Thanks for all the comments..


 
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JMOR
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PostPosted: Mon Aug 19, 2019 9:12 am    Post subject: Re: 8n, 12volt Front distributor No power, quits after 20min Reply to specific post Reply with quote

A coil with a 3 Ohm primary needs no resistor at all.....now you have just one more to remove.
 
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SoccerTopher
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PostPosted: Tue Aug 20, 2019 4:08 am    Post subject: Re: 8n, 12volt Front distributor No power, quits after 20min Reply to specific post Reply with quote


I'm happy to say I think I got it. I removed the ceramic resistor, (I have no resister inline from the coil to the toggle switch) which helped a touch, but I went back to messing with the carb to which I think had the biggest effect. I started to turn the main mixture screw out 1/4 turn each time loaded the tractor and repeated this until it didn't stumble.
Glad to say my family 8n for the past 42 years is back to its glory days...

Thanks for all the suggestions and help, This was a Happy ending.....
 
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