The coil is dead from cold.
@jack action I can’t see, from those links, an equivalent circuit, unless I’m missing something. I’m looking for two magnetic poles and three connections, kill, earth and spark. The positions of the poles are critical for defining charge and trigger, for ignition timing, and I think there’s some significance in the presence of two magnets, not one, on the flywheel.
Having fitted an aftermarket coil, I have spark, but no run. An occasional spit out of the exhaust or carb is all I can get, even with starter spray.
I have checked:
- flywheel was still keyed in the right place.
- No airflow blockage in exhaust or carb side. It’s getting fuel, as the plug gets wet.
- Compression reasonable, by feel.
So I have spark, fuel, compression, timing and airflow. But it won’t run.
Considering the starter fluid test as diagnostic for a no-spark condition, the only thing I can conclude is that the new coil is able to spark in free air, but not under compression. Genuine coil ordered.