How to Set the Cutting Height on a Push Mower
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Knowing how to set push mower height takes only a few steps: you move the wheels or a height lever to one of the cutting positions on the deck, then check that the mower sits level before you start. Most push mowers use a single lever or a set of wheel adjusters, and the range is usually between about 1 inch and 4 inches. The right setting depends on the grass type and the season, and it should never be set so low that you remove more than about a third of the grass blade in one mowing.
Quick answer
- Park the mower on a flat surface and turn it off. Follow the owner’s manual for disconnecting power before you work under the deck.
- Find the height control. On many push mowers it is one lever that moves all the wheels together, while others have a separate lever at each wheel.
- Pick a height in the middle of the range for most home lawns, then check the cut on a test strip.
- Keep the same setting for several mows. A University of Illinois Extension guide says that for most home lawns the easiest approach is to set the height and leave it there.
Before you adjust the height
Start by reading the height range in the owner’s manual or the product listing. The range is the most useful number, because it tells you the lowest and highest cut the deck can make. Listings for push mowers in this group state very different ranges. The CRAFTSMAN corded electric push mower lists a single lever that adjusts from 1-1/2 inches to 4 inches. The BLACK+DECKER corded model describes a tool-free single lever that moves between 1-1/2 inches and 4 inches. The BILT HARD 201cc gas push mower lists a single lever with four-wheel synchronized adjustment from 1.2 inches to 3.75 inches, with 10 positions.
Also check the surface you are mowing. Set the mower on a flat, dry lawn before you adjust it, because a sloped surface makes the deck sit at an angle and gives an uneven cut. If the mower has a rear bag, empty it first, so the weight is not pulling the deck to one side while you work.
Step by step: set the height on a lever-adjusted push mower
Most push mowers with a single height lever follow the same pattern. The steps below describe the general process, and the exact position of the lever depends on the model.
- Turn the mower off and disconnect the power. For a corded or battery mower, unplug it or remove the battery. For a gas mower, follow the owner’s manual for disconnecting the spark plug before you touch the deck or the wheels.
- Locate the height lever. On a single-lever design it is usually near the rear wheels or on the handle. The CRAFTSMAN and BLACK+DECKER listings describe a single lever that adjusts all the wheels at once, which keeps the deck level.
- Move the lever to the desired position. Lift or push the lever to the next notch. Most levers have a locking position so the deck does not drop during a mow.
- Check that all four wheels are at the same height. Look at the deck from the side. If one wheel sits higher than the rest, the cut will be uneven. The BILT HARD 201cc listing describes four-wheel synchronized adjustment, which is designed to avoid this problem.
- Test the cut. Mow a small strip, then look at the grass. If the tips look torn or the lawn looks scalped, raise the deck one notch.
Step by step: set the height on a wheel-adjusted push mower
Some push mowers use a separate adjuster at each wheel rather than a single lever. The process is the same, but you must set every wheel to the same notch. Use the mower’s markings to match the height on each side, and check the deck from the front and the side. The DORTALA corded electric listing describes a three-position system with settings of 1 inch, 1.8 inches and 2.5 inches. Set the front and rear wheels to the same height on each side before you test the cut.
Choosing a height for your lawn
The best height depends on the grass species, the season and how often you mow. The University of Illinois Extension page gives a mowing height of 2-1/2 to 3 inches for most lawns, and species-specific ranges such as 1 to 3 inches for zoysiagrass and 2-1/2 to 3-1/2 inches for tall fescue. Those are the figures to match against the range on your mower.
The same guide states the one-third rule: do not remove more than one-third of the grass leaf in a single cutting. If the grass has grown very tall, raise the deck for the first cut and lower it gradually over the next few mows. That approach avoids shocking the lawn and gives a cleaner result.
Mowers in this guide and their height ranges
| Push mower (listing) | Power | Height range stated | Adjustment |
|---|---|---|---|
| PowerSmart 40V 17 inch combo | Cordless battery | 1.5 to 3.9 inches, 6 positions | Height adjustment on the mower |
| PowerSmart EasyCut 18 inch gas | Gas | 1.5 to 3.9 inches, 5 positions | Height adjustment on the mower |
| CRAFTSMAN 20 inch corded | Corded electric | 1.5 to 4 inches | Single lever; title refers to 6 settings, spec table lists 3 positions |
| BLACK+DECKER 20 inch corded | Corded electric | 1.5 to 4 inches, 6 settings | Tool-free single lever |
| BILT HARD 201cc 21 inch gas | Gas | 1.2 to 3.75 inches, 10 positions | Single lever, four-wheel synchronized |
| Hoteche 10-amp corded | Corded electric | 1 to 2.2 inches, 3 levels | Single lever, tool-free per listing |
| DORTALA 14 inch corded | Corded electric | 1, 1.8 and 2.5 inches, 3 positions | Wheel adjustment |
| LiTHELi 14 inch cordless | Battery (battery sold separately) | 1 to 2.5 inches, 5 positions | One-lever adjustment |
| Walensee 16 inch reel | Manual | 0.6 to 1.5 inches, 4 positions | Pull the adjustment handle |
Where a listing gives two different numbers for the same setting, the table shows the title or bullet figure and notes the conflict. Check the manual before you rely on a single number.
Common mistakes when setting push mower height
- Setting the deck too low for long grass. Cutting more than a third of the blade at once stresses the grass and can leave brown tips.
- Leaving one wheel higher than the others. The deck then sits at an angle and cuts unevenly, which is more visible on a flat lawn.
- Changing the setting while the mower is running or connected to power. Always turn off and disconnect before you touch the deck or wheels.
- Not testing the cut. A small test strip shows the result before you mow the whole lawn.
FAQ
How do I know what height to set?
Start with the species of grass and the mowing height recommended for it. For most home lawns, the University of Illinois Extension page suggests about 2-1/2 to 3 inches. Pick the setting on your mower closest to that range, then adjust if the grass looks scalped or too long.
Do I need tools to change the height?
Many push mower listings describe tool-free adjustment. The BLACK+DECKER and CRAFTSMAN listings describe a single lever, and the Walensee listing describes pulling the adjustment handle. Other models may use wheel adjusters that need a different method, so check the owner’s manual.
Why does my mower cut unevenly after I change the height?
The most common cause is a wheel set at a different height than the others. Check each wheel and the deck from the side. If the mower has a single lever, confirm the lever is fully locked in its notch.
Should I raise the mower for the first cut of spring?
The Illinois Extension guide describes raising the deck when the grass is very tall, then lowering it gradually over later mows. This keeps the one-third rule in place. Start high, then return to your normal height as the grass settles.
Does a lower setting give a better lawn?
Not always. A lower setting gives a shorter cut, but it removes more of the leaf and can weaken the grass. Choose the height that suits your grass type, and keep it steady for most mowing.
Bottom line
Set the push mower height to a level that matches the grass type, keep all wheels or the deck at the same notch, and never remove more than a third of the blade in one mowing. Test a small strip before you mow the whole lawn, then keep the same height for most of the season.
Related reading
For a broader look at the adjustment on other mower types, see How to Set the Cutting Height on a Mower. If you are comparing powered push models, read CRAFTSMAN Electric Push Lawn Mower Review.
