Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
I have at least one of those spare, you could have had it FOC if you weren't in Europe.
You are having some bad luck with seized stuff Alex - a used item might be cheaper than an engineering shop.
I’ll have at look at one of my spares, will check that it will come apart as you don’t want to find out another screw breaks on the replacement.
It's been many years since I've had to do this job. As such I didn't seem to recall how the primary drive housing came apart.Can I ask Alex why you took it apart, of tried to take it apart is more descriptive.The reason I ask is that to replace the primary drive damping rubbers you don't need to remove those 3 screws, they are for access to the starter gear rollers and springs, I'd forgotten that. It's the circlip on the other end which allows access to the damping rubbers. Anyway, mines apart. Came apart with no problems even after 40 odd years being stuck in a box in a shed with a leaky roof.
Good result. And good that the starter clutch fell apart so you spotted the broken screw. Don't forget to use thread lock on the screws when refitting.