John Deere A timing method

chas036 · Jun 30, 2020

I have a late model A with a distributor and electronic ignition. I would like to know the correct way to time it and if can be done with a timing light?

JDIH · Jun 30, 2020

Using a timing light probably wont work due to the advance weights advancing the timing. I may be wrong about that. I set the flywheel in the correct location and then use an ohm meter on the points. Turn the distributor until you see the points break open (on the meter). That method has worked for me. Mine are a little tough looking but run perfect. Drives me nuts to see ones at shows that look perfect and run terrible lol

chas036 · Jun 30, 2020

If I had points that would method would work and I have used that before on my B, but this tractor has an electronic ignition and I am at a loss how to time it.

wore out · Jun 30, 2020

Figure out the circumference of the flywheel at the timing mark location, then do the math to determine the distance represented by the degrees of timing wanted, or what every 5 degrees(for example) represents distance-wise and make some marks with a paint pen and fire up the timing light.

rustred · Jun 30, 2020

use a timing light. engine must run as slow as possible though so weights don't advance.

Mike(NEOhio) · Jun 30, 2020

Try it the same way but put No. 1 wire near the frame and watch for the spark.

JDIH · Jun 30, 2020

Oops sorry, I somehow missed that you said you have electronic ignition. Yes, that changes what I said

John Deere A timing method

chas036

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JDIH

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chas036

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wore out

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rustred

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Mike(NEOhio)

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JDIH

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