Where did my spark go??

[Irish John]

Working on Wombat, can't find a spark anywhere.
Ignition switch on, no spark. Turn ignition switch halfway on, 25% of the time, get a spark momentarily.
By pass the ignition switch no spark, period.

Any ideas?

[Bullfrog]

I'd recommend that you simply un-plug the main switch from the electrical harness, also the kill switch. Then test for spark. You will then be working with the bare minimum number of components required to produce the spark. Points, condenser, source coil, blue and black wires, high tension coil, spark plug wire/cap and spark plug. This should help you "find" the spark. Once reliable, strong spark has been established, you can re-connect the kill switch. If spark stays "found" . . . then you can re-connect the main switch - and hopefully, the spark won't disappear again. But if it does . . . the main switch has a role in its disappearance.

Ed