I've been very confused by the variety of types but haven't found a way to tell which type it is. I'm based in the UK so presume the motor was a European model. It also seems odd that the engine number is above the range most parts website say exist.
Choke was closing fully. The odd thing was that the motor was running quite well when I used it. That suggests that either I've put something back wrong (I didn't take out the timing gears) or something I've done has messed it up. I cleaned the old carb thoroughly and didn't find any blockages in any of the jets or tubes.
I'll have another go when the stress levels have dropped.
