Grumpy, my hat off to you. That shows some knowledge of this engine.
I was meticulous about extraction and parts retention.
There was no washer.
I discovered where it went by trial and error and have it back together.
Now the damned trigger wire has broken off clean at the point at which it meets the body of the coil! I am so keen to get this running but I fear that I will not be able to source a new coil.
Any tips on where to get one?