Unfortunately, most self-propelled lawnmowers do not have the capability to move backward under power. This means that if you need to go backwards with your lawnmower, you will have to manually push or pull it in the desired direction.
One of the main reasons why self-propelled lawnmowers do not have a reverse function is because their design is optimized for forward movement. The drive system, typically powered by a gas engine or an electric motor, is engineered to provide power to the wheels in a forward direction. This allows the lawnmower to effectively cut grass as it moves forward.
Adding a reverse function to a self-propelled lawnmower would require a more complex drive system, which would increase the cost and complexity of the machine. Additionally, a reverse function might also compromise the maneuverability and overall performance of the lawnmower.
In my personal experience, I have used several self-propelled lawnmowers over the years, and none of them have had a reverse function. Whenever I needed to maneuver the lawnmower in a backward direction, I had to physically push or pull it to achieve the desired result. While this can be a bit inconvenient at times, it is a small trade-off considering the convenience and efficiency of a self-propelled lawnmower in general.
To summarize, most self-propelled lawnmowers are designed to move only in a forward direction and do not have a reverse function. If you need to go backwards with a self-propelled lawnmower, you will have to manually push or pull it in the desired direction.