There are two types of Rotary Petrol Lawnmower, the four-wheeled type or the Hover petrol lawnmower. Wheeled Rotary Lawnmower. A Wheeled Rotary petrol lawnmower could be the ideal choice if you have a multipurpose lawn, used by all the family, which sees a lot of use and which may be uneven in places. Because of the blade action on a rotary mower, the finish is not as crisp and neat as with a Rotary Lawnmower, however, if a striped finish is important to you, you can buy a model with a roller. How do they work? A Rotary lawnmower has blades...