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8n ford ballast resistor

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rdjinny

12-01-2021 03:44:22




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Hi everyone, I am trying to get this tractor running but haven't had much luck yet

my question is since i purchased a 12-volt coil do I still need to use a ballast resistor? if not how would i wire it?

Also I am having a really difficult time finding top dead center compression in number 1 cylinder is terrible, the rest of the others have good compression, tried balloon but didn't expand very much, but assuming this was TDC. any thoughts?

appreciate any comments

Rick

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KristofMI

12-09-2021 05:06:34




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 Re: 8n ford ballast resistor in reply to rdjinny, 12-01-2021 03:44:22  
Quote: R Geiger (quoted from post at 20:10:06 12/01/21) There are two sets of timing marks on the flywheel, 180 degrees apart. Make sure you get the correct one for # 1 cylinder.

That's why we make sure the #1 cylinder is at the TDC right? This is the only reason? To make sure we are at the correct markings?
This post was edited by KristofMI on 12/09/2021 at 05:12 am.

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JMOR

12-02-2021 07:37:24




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 Re: 8n ford ballast resistor in reply to rdjinny, 12-01-2021 03:44:22  
Quoting Removed, click Modern View to seeHello, piston is a top (discounting ign advance) when it fires. 180 degrees later is is at bottom at end of power stroke. 360 after firing it is at top again at end of exhaust stroke. At those 180 marks, #2 & #3 are at top, one EX the other fire.. So, the simple answer to your question would be no.



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rdjinny

12-02-2021 02:12:20




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 Re: 8n ford ballast resistor in reply to rdjinny, 12-01-2021 03:44:22  
Thank you for all the help, isn't the timing marks 180 degrees apart the exhaust?



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R Geiger

12-01-2021 19:10:06




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 Re: 8n ford ballast resistor in reply to rdjinny, 12-01-2021 03:44:22  
Quoting Removed, click Modern View to see

Sorry about the double post!!! Bruce outlined it real good, but I would add one thing, There are two sets of timing marks on the flywheel, 180 degrees apart. Make sure you get the correct one for # 1 cylinder.



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R Geiger

12-01-2021 15:05:33




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 Re: 8n ford ballast resistor in reply to rdjinny, 12-01-2021 03:44:22  
Quoting Removed, click Modern View to see

Sounds to me like you need to get a timing light! without one you are just guessing!.



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R Geiger

12-01-2021 14:58:25




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 Re: 8n ford ballast resistor in reply to rdjinny, 12-01-2021 03:44:22  
Quoting Removed, click Modern View to see

Sounds to me like you need to get a timing light! without one you are just guessing!.



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rdjinny

12-01-2021 14:39:32




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 Re: 8n ford ballast resistor in reply to rdjinny, 12-01-2021 03:44:22  
Hi Bruce

I did remove the distributor, and set it the best i could to TDC

anyway, I finally got it running, but it took several tries, I had to loosen and rotate the distributor clockwise in order for it to start,

and it needs to turn a little further to run smoothly, I am unable to turn any further should I pull the distributor and rotate a gear or two? and which way should I rotate it
Rick

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Bruce (VA)

12-01-2021 15:53:55




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 Re: 8n ford ballast resistor in reply to rdjinny, 12-01-2021 14:39:32  
Where you trying to adjust the timing by ear? If so, you just learned something that many of us learned 40 years ago....it ain't gonna happen. yes, by guessing, you could easily be one tooth out. Time to start over.

Remove the #1 spark plug. (removing all of them makes the job a bit easier) Ignition off, place your thumb over the #1 spark plug hole and crank slowly until compression is felt. Continue to crank the engine until you see the timing mark, 0* (top dead center) on the flywheel through the timing hole in the right side of the bell housing. Use chalk on the flywheel to exactly align the 4 degree mark with the pointer. Hold the distributor beside the engine. W/ the distributor oiler at the 7 o'clock position & the stud at 9 o'clock, turn the rotor until it points roughly at the right front head bolt. (close counts) Now insert the distributor. Rotate the distributor housing counter clockwise until the points are closed. Put the cap on & double check the plug wires, 1-2-4-3, CCW. Then, remove the primary wire from the side of the distributor (or at the coil, whichever is easier) Put one lead of your VOM (set on resistance) on the stud on the side of the distributor & the other on the block or other good ground. Slowly turn the distributor. The needle will move as the points close & then open. Find the exact spot just as the points open & then tighten down the distributor.

Now check your work (and the dynamic timing) w/ a light.

If it won't idle below 500 rpm (400 is better) don't bother w/ a light.

If it idles ok, make 3 marks w/ chalk or white paint on the flywheel:

4*
10*
17*

Start the engine.

At idle, the light should flash & the marker should line up exactly at 4* if you did the static timing correctly.

If not, loosen the distributor & turn it until the marks line up. It should take very little adjustment.

Once you've got that done, increase the engine speed to 1200 rpms. The light should flash & the marker should line up w/ the 10* mark. Then, increase the rpms to 2000 & look for the marker to align w/ the 17* mark.

Close counts on the advanced timing. A degree or 2 either way is ok. But, no movement or 5* or more off means you have an advance weight problem. You don't adjust the distributor to fix that.

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rdjinny

12-01-2021 04:59:42




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 Re: 8n ford ballast resistor in reply to rdjinny, 12-01-2021 03:44:22  
side mount distributor



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Bruce (VA)

12-01-2021 05:30:17




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 Re: 8n ford ballast resistor in reply to rdjinny, 12-01-2021 04:59:42  
You do not need a resistor w/ a 12v side mount coil.

Have you removed the distributor from the tractor?



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Bruce (VA)

12-01-2021 04:52:48




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 Re: 8n ford ballast resistor in reply to rdjinny, 12-01-2021 03:44:22  
Front or side distributor?

See tip # 30.



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