Your mower's efficiency depends on the condition of your mower prior to mowing. While your mower is shut off, there are several items that need to be checked. The blades should be sharp. Dull or lose blades are ineffective and potentially dangerous. Tighten all loose screws. Clean grass and debris from the underside of the mower, as grass clumps affect the performance of the blade. If using a self-propelled mower, set the speed to a comfortable starting speed. Check the gas level. Only refill it when the mower is cool. Always read the owner's manual before using a new lawn mower.
Pick up any sticks, rocks or debris on your lawn before turning on your mower. Start your lawn mower on a flat surface, preferably short grass, so that the blades don't come in contact with objects that would get caught in the blade. Don't start your mower over tall grass, as the grass may snag on the blade, causing an uneven cut or no cut at all. Once the mower is on, you need to be in complete control. Don't leave the mower unattended while it's running. If the mower vibrates when you turn it on, it may be a sign that your blade is too lose, unbalanced or in poor condition and requires prompt replacement before mowing.
Once starting your lawn mower, proceed to mow. If your lawn is sloped, begin mowing at the bottom of the slope, making horizontal passes. This ensures that you and your mower will not slip down the slope. Never mow when your grass is wet in order to avoid leaving behind heavy grass clippings. These damp clippings provide the ideal environment for mold and fungus to grow, which can create dead patches in your lawn over time. The height of the blade is set based upon the current height of your grass. Always cut only a third off of the current height. Cutting your lawn any shorter makes the grass develop shallow roots, thus taking in less water as the grass grows.
Dressing properly protects you from debris that become potential projectiles when mowing. Long pants, boots and ear plugs or ear muffs keep you safe while mowing. Always shut your mower off when traveling over hazardous surfaces, such as rocks. If your lawn mower stalls, remove it from grass and try to start it again on a flat surface, such as a sidewalk or driveway that is clear of gravel, branches or any kind of projectile.