Thanks for that Grumpy, I'll have to have a look through some of my recent donations from that era, Looking at the records i have with me, i dont have a 92508, but I have a few models from 1980 - 1988, so maybe one of thos may have one.
Since i have branced out, I have been trying to get my hands on as many different engines, and carby's as possible, to get my experience up and work out as much about the engines, and thier histories as possible. So if i dont have a Minion yet, i now know what to look out for!
With the coil, is it possible there was an overlap, maybe they started relesing the magnetron on some models in 82, and ran the points out till the next year on others?