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Ignition timing on Farmall A

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BillWV

07-02-2003 19:11:19




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YTers,
My manuals don't give any advice about using a timing light to check/set ignition timing. About what throttle setting should ignition timing be checked? And, is the timing mark the "V" on the flywheel?
Thanks,
Bill




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CNKS

07-02-2003 19:39:15




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 Re: Ignition timing on Farmall A in reply to BillWV, 07-02-2003 19:11:19  
There is a very small mark on the flywheel that you line up with the raised mark on the cast plate behind the oil pan. Hard to find but it is there. The mark may or may not have "DC I4" on either side. A timing light is not necessary. Line up the marks with # 1 at TDC, rotate the distributer about 30 degrees counterclockwise viewed from the rear, remove the coil wire from the distributer cap, turn on the switch and rotate the dist clockwise until you get a spark between the coil wire and the primary terminal on the dist. Doublecheck by hooking the coil wire under the dist cap clip so that the tip is a fraction of an inch from the primary terminal, crank the engine one rev with the hand crank until you get a spark. Check the timing mark, it should line up, or be very slightly past the mark on the cast piece (NEVER before).

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BillWV

07-03-2003 05:00:49




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 Re: Re: Ignition timing on Farmall A in reply to CNKS, 07-02-2003 19:39:15  
Thanks. I apparently haven't found the right mark. Should I be looking through the oblong hole toward the front of the tractor? Is the mark on the flat part of the flywheel, on the inside of the gear teeth?
Bill



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CNKS

07-03-2003 18:28:01




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 Re: Re: Re: Ignition timing on Farmall A in reply to BillWV, 07-03-2003 05:00:49  
Best way to find the mark is to lay on your back, prop yourself up, shine a light through the oblong hole on the flywheel, and turn it with a screwdriver. It is on the flat part of the flywheel, best to clean the surface as best you can. It is there.



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Brian

07-02-2003 19:21:04




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 Re: Ignition timing on Farmall A in reply to BillWV, 07-02-2003 19:11:19  
Do you have a mag or coil ?



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CNKS

07-02-2003 19:49:47




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 Re: Re: Ignition timing on Farmall A in reply to Brian, 07-02-2003 19:21:04  
You do about the same thing for a mag, except instead of trying to get a visual spark, the impulse coupling trips. Begin by pushing the top of the mag against the block, set # 1 on TDC, pull mag out until impulse trips, tighten bolts. Check by cranking one more rev to next TDC, at which time impulse should trip.



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