Update- Despite all efforts by this engine to avoid producing a Spark, it finally relented the other week after delving deep behind the Flywheel and checking/cleaning everything.
Made some missing parts for the over complicated and non-repair friendly Bing Carb.
Managed to get it to fire a few times, but suspected the Carb settings were out, as I had not touched them.
Last Weds, able to get to it for an hour or so. Played with the Air Bleed and Governor, then burst into life with an impressive white smoke cloud.
It had been parked up several years ago and in a poor state in both condition and mechanically.
I'll post some pics of it and what it is attached to soon when it's in full running order and the owner gives me the OK.