Petrol lawnmowers can be disposed of free of charge in Germany. Similar to other technical equipment, this can be done at the nearest recycling centre. The staff differentiate between electric and petrol-powered lawn mowers.
The petrol lawnmower falls into the category of metal scrap. It is no longer necessary to drain the petrol and oil yourself and take it away before disposal.
To make your next petrol lawnmower last longer, you can take a look at how to properly maintain your machine here.