Im sure This has been covered before?
Also I Thought this engine was a H30?
https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=37736&page=allPto shaft has a circlip behind the seal and in front of the bearing, which will need to be taken off before the case can be removed...If your still looking for a solution
