SKM 1964 wrote: Something else to think about is flooded with 80w90 oil
Above they write that originally 80W90 wasn't there - do you read the answers in this thread?
mareckip26 wrote: And I flooded the lawn mower with cool drexton for about an hour and then suddenly stopped.
Since you once dug in this box, check if it is not a simple problem, such as falling out of the groove fixing one of the wheels.
mareckip26 wrote: Does anyone know if it is possible to repair such a crate or can you buy some parts for it?
You will not buy original parts because the manufacturer's case is not repairable. However, in the thread referred to in post # 5 you can read that there are in the .pl a tray that even oversized pistons make extra money ...