John Deere 420 no spark

   / John Deere 420 no spark #1  

jdcrazy1071

New member
Joined
May 15, 2017
Messages
6
Location
Pittsburgh, Pa
Tractor
420 GT
I have no spark. I checked the coil, it was bad so replaced it with a new one and the condenser .
Coil wires, plugs are good. Does not have points.

She is the P220G model

Any suggestions?
 
   / John Deere 420 no spark #2  
Do you have the TM for the tractor? It is most likely the electronic ignition module/trigger ring buried down under the flywheel. There is a way to test the module in the manual.
 
   / John Deere 420 no spark #3  
   / John Deere 420 no spark #4  
here it is as an attachment. this way, it won't get lost from a bad link.
 

Attachments

  • Onan Service Manual 965-0762_watermarked.pdf
    3.3 MB · Views: 261
   / John Deere 420 no spark #5  
Follow the instructions on this page. See if you can find the problem.

spark.jpg

Richard
 
   / John Deere 420 no spark
  • Thread Starter
#6  
Thank you all very kindly. I will try and see if that is the problem.
I will give feed back .
 
   / John Deere 420 no spark
  • Thread Starter
#7  

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