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Ford 9N, 2N & 8N Discussion Forum
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Need Distributor Experts

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Rollie

05-11-2006 19:56:30




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My 2N started,ran about 15 seconds, and died never to start again. Can"t get any spark!

Have a new coil, condenser, rotor, points, distributor cap, plugs, and battery. Went through all connections and they are bright and shiny. Point gap is .015. Have 6 volts at the top of the coil but no spark out of anything.

Appears to me the distributor is the culprit. I put a meter (using the ohm setting for circuit continuity) on it at the stationary point side and the other probe at the metal strip going to the other point. Shows to be continuous even when the points are open. This does not seem right.
When installing the points I put the metal strip from the condenser terminal between the 2 metal strips of the point assembly which is how it appears in the IT manual. However, the plastic separator must not be working. That is about the only place a ground could occur.
Need help!

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dave guest

05-12-2006 17:29:54




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 Re: Need Distributor Experts in reply to Rollie, 05-11-2006 19:56:30  
Ain't this a shorted condensor or I'm not payin' attention? Disconnect and check it wih ohm meter. Should read infinity or infinity after little blip of the needle with a real good meter (like 20,000 ohms per volt) job.



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Danny in CO

05-12-2006 07:35:48




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 Re: Need Distributor Experts in reply to Rollie, 05-11-2006 19:56:30  
Rollie,

You shoud be seeing battery voltage at the top of the coil (about 7+ volts) with the point open and about 3 volts with the points closed. If you are only seeing 6 volts your battery is low. You may have other problems also.

You can test the distributor off the tractor using a trick Zane told about years ago. Clamp an ear of the distributor in a vise. Put rotor, cap and coil on the distributor as normal. Put a plug wire in any hole in the cap. Hook the positive lead from your battery charger to the top of the coil. Hook the negative lead to the vise. Hold the plug wire close to the vise. Spin the distributor tang clockwise with your fingers. You should get a spark at the plug wire. If not then hold the plug wire with your fingers and spin it again. You may get a jolt if it is firing.

Also, I would replace the plugs with Autolite 437s. Your old plugs could be fouled.

Good luck!

Danny

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RockyMO

05-12-2006 05:50:22




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 Re: Need Distributor Experts in reply to Rollie, 05-11-2006 19:56:30  
It does sound as if the points are grounded out. Maintain the ohm meter on the points the same way you described and disconect the stud where it goes through the distributor housing. I suspect the meter will now show that the points are no longer grounded. The insulator is famous for failing at this point causing the problem you describe. It's always a good idea to test this after installing new points to save time removing the distributor again.

Rocky

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Bob

05-11-2006 20:17:21




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 Re: Need Distributor Experts in reply to Rollie, 05-11-2006 19:56:30  
With the coil removed, and the points OPEN, resistance from the common terminal the points and condensor (and the brass screw the coil sits on) to ground (the distributor housing) should be infinite.

With the points closed, resistance from the same point to ground should be ZERO.



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Rollie

05-11-2006 20:52:26




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 Re: Need Distributor Experts in reply to Bob, 05-11-2006 20:17:21  
The readings on the distributor were done with it removed from the engine and nothing attached.



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Bob

05-11-2006 20:56:38




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 Re: Need Distributor Experts in reply to Rollie, 05-11-2006 20:52:26  
Have you removed the screw, and tested the individual parts for continuity to ground with the points open... check the points, the condensor, and the insulated terminal, and see where the short is.

If this is an as-original 6-Volt system, it is odd that you would be seeing 6-Volts at the coil's primary terminal, if there is a short to ground AFTER the coil, as it appears there is.



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roger '40 9n

05-12-2006 04:52:27




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 Re: Need Distributor Experts in reply to Bob, 05-11-2006 20:56:38  
Not too odd. He said that he put in a new coil.
The springy thing on the bottom of the new coil may need stretching out a bit. If it is not making contact with the screw inside the distributor then seeing six volts at the top of the coil is normal.

Roger in Michigan.



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Bob

05-12-2006 07:50:54




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 Re: Need Distributor Experts in reply to roger '40 9n, 05-12-2006 04:52:27  
Roger,

The point I was making is that his observation, using the ohmmeter, that the was a short in the area of the points, yet he's seeing fall battery voltage at the top of the coil likely indicated he has more than one problem.



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LeeMo

05-12-2006 07:43:55




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 Re: Need Distributor Experts in reply to roger '40 9n, 05-12-2006 04:52:27  
That's what I'd check first too.



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