Intermittent Spark Issue

[Fullers Farmalls]

All, finally after several years I'm getting back to my Paps 9N. I seem to have spark at the start of getting the engine spinning and at the end but not while it's spinning over in the middle. Condenser? Coil? I have every spare part thanks to TSC clearancing off all their old tractor stuff except a coil. Tried 3 different condensers but still nothing. Have 12 volts coming through the coil but not consistent spark. TIA

 

[Kondoge]

I would say myself something is moving causing the spark to stop at full starter speed and work when its at lower speeds, possibly worn bushings in the distributor shell causing the breaker cam to have excessive play at speed (making the points open wonky) or something funny with the weights possibly, heck could even be the point plate screw came loose.
Coils aren't hard to obtain, just ensure it is a quality 12 volt one meaning not Amazon coil.
Should also ask, what method did you use to test your spark?

 

[Fullers Farmalls]

I would say myself something is moving causing the spark to stop at full starter speed and work when its at lower speeds, possibly worn bushings in the distributor shell causing the breaker cam to have excessive play at speed (making the points open wonky) or something funny with the weights possibly, heck could even be the point plate screw came loose.
Coils aren't hard to obtain, just ensure it is a quality 12 volt one meaning not Amazon coil.
Should also ask, what method did you use to test your spark?

I cleaned all the connections, I mean all electrical connections to bare bright and got the battery fully charged and it seems to be sparking really good now. Still won't start but Ill get to the carb at some point today.

 

[Kondoge]

Sometimes that’s all it takes, that’s all it took me, as for the carb make sure you set it both adjusting screws at 1 1/2 turns out as a baseline, you can fine tune it from there

 

[Eman85]

How are you testing spark?

 

[Kondoge]

I’d imagine they would be testing by the way the manual calls for which is holding the sprarky wires above a head bolt. Or maybe they’re using the farmer method of just pulling the plugs out of the head and letting them fire. The best would be if they were using a spark gap tester though. How big of a gap does your spark jump?

 

[Jim L WA]

Do you have fresh gas in it?