Using a walk-behind or riding lawn mower safely takes one read of the manual, a cleared yard, and the right protective gear.
Mowing looks simple until a rock shoots out from under the deck or the grass catcher jams. The right way to use a lawn mower starts before the engine turns over, and it follows a straightforward order all season long. This guide covers the essential steps for one of the best lawn mower safe-operation routines you can follow, from the pre-start check to the final shutoff.
Prepare the Mower and the Yard First
Read the operator’s manual before you pull the cord or turn the key.
Walk the lawn and clear rocks, toys, branches, and other debris the blade can throw. Inspect the mower and confirm the guards, shields, grass catcher, and discharge deflector are all in place and working. A damaged deflector redirects the danger straight at you.
Set the cutting height before you start.
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Gear Up and Start Outdoors
Wear long pants, close-fitting clothes, eye protection, hearing protection, and sturdy closed-toe footwear.
Start the mower outdoors, never in a garage or shed. Gas fumes and carbon monoxide build up fast in enclosed spaces. Position the mower on stable, level ground before starting.
Mowing Technique That Keeps You Safe
Mow only in daylight or good artificial light, and never on wet grass or in bad weather. Push the mower forward only; back up only when absolutely necessary, and look carefully for children behind you first. Turn slowly and gradually.
On slopes, walk-behind mowers should cut across the face of the slope, not up and down. This prevents the mower from tipping backward onto you.
| Mower Type | Slope Direction | Key Rule |
|---|---|---|
| Walk-behind | Mow across the slope | Never up and down the face |
| Riding mower | Mow up and down | Avoid side-to-side on hills |
| All types | Steep slopes | Skip mowing or use a different tool |
| All types | Wet grass | Wait for it to dry completely |
| All types | Near edges | Walk the perimeter first to spot hazards |
Keep hands, feet, children, pets, and bystanders away from the blade and discharge area. The discharge chute should never point at people, animals, buildings, windows, or glass doors. Children should be indoors or far away while you mow, and never ride as passengers on ride-on mowers or garden tractors.
Never leave a running mower unattended, and do not lift or tilt it while the engine is on. The CPSC’s lawn mower safety guidance is blunt: keep your distance from the moving parts at all times.
Handle the Cut and the Aftermath Correctly
If the mower strikes an object, stop it, turn it off, and inspect the blade and housing. Do not use the mower again until you’ve repaired any damage. A bent blade throws the whole machine out of balance and can cause vibration damage to the crankshaft.
Stop the mower and wait for the blades to fully stop before unclogging the chute, removing the grass catcher, or crossing non-lawn surfaces like driveways or sidewalks. Never unclog the chute while the motor is running, and don’t touch hot motor parts after a long run. The blade can still spin for seconds after the engine stops, which is enough time to cause a serious injury.
There’s a good reason for all this caution. The federal safety standard for walk-behind power rotary lawn mowers took effect June 30, 1982, and the CPSC reports that mowers manufactured since then must meet mandatory safety requirements. Even with those safety systems, the riding mower fact sheet notes an annual average of about 90 deaths attributed to riding mowers during 2008–2010. You can find further details in the CPSC’s riding mower fact sheet.
FAQs
Is it safe to mow wet grass?
No. Wet grass makes the mower slip, clogs the deck, and throws clumps that damage the lawn. It also increases the risk of electric shock with corded mowers and reduces traction on slopes. Wait until the grass is dry to get a clean, even cut without the safety hazards.
Why should I mow across slopes instead of up and down?
What should I do if the mower hits a rock?
Stop the mower immediately, turn it off, and wait for the blades to stop. Inspect the blade for nicks, bends, or cracks, and check the housing for damage. If anything looks wrong, don’t run the mower again until the part is replaced or repaired. A damaged blade can break apart at high speed.
References & Sources
- CPSC. “Lawn Mower Safety.” Outlines safe operating practices and the federal safety standard effective June 30, 1982.
- CPSC. “Riding Lawnmower Fact Sheet.” Details riding mower risks and the annual average of about 90 related deaths from 2008–2010.