(no, really, I do want some advice on one!)
It's spring, so I was cleaning the patio.
It stopped.
It had tripped the breaker for its circuit, the main breaker in the garage box, and the breaker for the garage feed at the house end.
It did it again when I retested.
On investigation the motor windings are as near as I can tell with a cheap meter a dead short. So it's scrap. (wasn't that good anyway...)
Suggestions for a new one please.
Andy