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Tractor Talk Discussion Forum

1939 9N Starting problem

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Killim

01-06-2007 14:12:50




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Helping a friend with his resto. Tractor was running when resto started. It has the newer 3 wire 6V genny and newer style Voltage regulator. Points are new and gapped properly. Condenser is NOT new. Coil is a Taiwan replacement-not original. Battery, all wiring, and battery cables are all new and sized properly. Had an intermittent spark at the lead in wire to the coil but now it is gone. I'm using a test light on the lead in wire to the coil to check for voltage. Obviously there is no spark across the points. Didn't have any when I had weak spark at the coil either. All ground connections have been cleaned to make a good connection. I have a PDF file of the way I wired the tractor if that will help identify the problem. I used the routing on my 1947 2N as a guide along with the Ford Manual-although the manual is somewhat confusing to me! My 2N has a different VR and has the single wire genny. Not certain of the correct placement of the wiring on the VR and genny either as there are no markings on either unit. I thought the ARM was on the end of the genny and goes to the ARM on the coil but not certain which post it is. Also, can't identify the field and gnd on the genny. I don't think the genny/VR wiring would affect the starting though. Any help from the pros out there would be appreciated. We really want to listen to this thing run!

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old

01-06-2007 15:51:54




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 Re: 1939 9N Starting problem in reply to Killim, 01-06-2007 14:12:50  
I would replace the condenser, and clean/regap the points. Set them at .015. Double check the spring on the coil and make sure its hitting where it should be. Also jumper around the ignition switch since they are known to be a weak link in the systyem



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Killim

01-06-2007 17:03:28




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 Re: 1939 9N Starting problem in reply to old, 01-06-2007 15:51:54  
Already did all of the above except the condenser. I don"t think the condenser is preventing voltage into the coil though. I could however prevent spark at/through the points. I have no voltage into the coil.



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old

01-06-2007 17:59:00




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 Re: 1939 9N Starting problem in reply to Killim, 01-06-2007 17:03:28  
Well if you jumpered the ignition switch then you could have a bad resistor. Is this 12 volts or 12 volts. Theres a resistor on the back side of the dash that some times goes bad and if it does then you will not have spark



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