Is there anything special about the cork upper drive shaft seal p/n 303355? Can an effective seal simply be made from sheet cork gasket material of the same thickness?
Drifter
I use rubberised cork material with good results. Not pure cork.
If you work on any larger two or three cylinder motors, the air box cover gasket will come stamped out of a sheet of the correct material and the extra material is perfect for these six horse seals.