I've been able to order the the rubber carb mounting plate, so will fit that when it arrives. P/n 030129765
From the parts list, it call the screw, 'CO balance adjustment' I now see there is an idle mixture screw on the other side of the carb, so will have to fiddle with these two once the plate and air leak is fixed.
Is there a downloadable page for the carb settings?. I see now the engine is a HZ.
I also need a part number for the vacuum capsule on the Bosch distributor, the diaphragm in it is not holding a vacuum, but I think once I get the Bosch number off the distributor I might find the p/n for the capsule, unless anybody knows it pls.