·  This is merely a potential oversight and not actually a repair. You can locate a long metal rod or pin coming from the hydro transmission on the back of the lawn mower. ·  This may be marked with a label and feature a pull-out hoop on some lawn mowers. If you can move the lawnmower with the brake off, the drive has disengaged. The mower should return to drive if you push or pull the lever. ·  Make sure you only use this with the brake engaged and the lawn mower turned off. If your mower is on an incline, take caution since the mower may roll away if your drive is already engaged and you release it.