Mow your lawn before the grass gets 4 inches tall. Leave your clippings on the lawn. They fertilize the soil and do not cause thatch as was once thought. Mulcher mowers make shorter clippings that decompose faster and help fertilize the lawn. Sharpen your mower blades when dull, at least once each year.
Mowers can start when the blade is turned.
Disconnect the spark plug wire from the spark plug before removing the mower blade. Control weeds by following good mowing, watering and fertilizing practices. Dig them out. Digging 4 - 5 inches of the root will kill most dandelions. You may have to dig some a second or third time.