Hand-propelled Lawnmower. Make sure that the lawn is clear of stones, sticks, wire or other objects that could damage the product. Never cut off more than one-third of the total length of the grass for a healthy lawn. In the autumn, lawns should only be cut as long as there is growth. Attach the grass catcher and empty the grass catcher regularly. Slowly push the product forward. Mow in slight overlapping rows. The most effective pattern for mowing lawns is straight lines along one of the sides. This will keep the rows even and ensures that all the lawn is cut without missing any spots.. Maintain a neat and tidy lawn with this B&Q hand pushed lawnmower. Lawnmower by.