Apologies for going off topic but I have picked up a lovely old Atco admiral lawnmower and would like to be able to keep it going so I was hoping to be able to find a user manual. I tried Atco but they say it was nade before their time (by Bosch, apparently). It has a Briggs and Stratton engine. I have attached a photo of the engine plate. I am surprised that there doesn't seem to be anything on the Internet!