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HiringBlade Sharpening

Should I sharpen mower blades myself or have them sharpened?

Sharpen a push mower's blade yourself if you are handy with a wrench and file, since it is quick and cheap. Have a shop do it for a riding mower, a damaged blade, a stuck bolt, or if you lack the tools. Either way, disconnect the spark plug or battery first.

Free to ask. Local shops send quotes, and you pay only when you book one.

By Kasra Taheri, Founder, LoclisPublished

Researched and drafted with AI, then checked claim by claim against the sources listed below before it was published. Prices and rules change; the dates beside each source say when it was last checked.

Step by step

Read when to stop and call a pro, further down this page, before you start.

  1. Step 1: Check the mower type

    A push or small self-propelled mower is the easiest to do at home; a riding mower is usually best left to a shop.

  2. Step 2: Check the blade

    Look for bends, cracks or thin wings; a damaged blade needs replacing, not sharpening.

  3. Step 3: Check your tools

    You need a socket wrench, a file or grinder, a clamp and a way to check balance.[1]

  4. Step 4: Disconnect power

    Pull the spark plug wire or remove the battery before any blade work.[2]

  5. Step 5: Decide

    Sharpen it yourself if the job looks simple, or hire a shop if any of the checks fail.

  6. Step 6: Consider a second blade

    Swap in a spare blade so the mower is never out of service.

For most homeowners with a push mower, sharpen it yourself if you are comfortable with a wrench and a file: it is quick and cheap. Have a shop do it if you have a heavy riding mower, a seized bolt, a damaged blade, or no tools. Either way, disconnect the spark plug or battery first.

A mower blade mounted under a walk-behind mower deck, with dried grass clippings caked on the deck around it
Photo: Atomicdragon136, CC BY 4.0, via Wikimedia Commons

When doing it yourself makes sense

Illinois Extension lists the tools that work: a bench grinder, grinding stone, or a simple file, and says commonly, hardware stores sell inexpensive mower blade sharpening kits.[1] Those kits often include a cone-shaped balance, which is what makes home sharpening reliable.

DIY suits you if the mower is a push or small self-propelled model, the blade is in good shape, and you have a socket wrench, a vise or a clamp. It also pays off for lawns that need frequent sharpening. Virginia Cooperative Extension's lawn guide says to sharpen blades every four to six weeks during the mowing season.[3] Taking the mower to a shop that often is a nuisance.

The method is in how to sharpen lawn mower blades.

When to have it sharpened

Hire it out when:

  • The mower is a riding mower or zero-turn. The decks are heavy, there are two or three blades, and the mower needs lifting or tipping safely.
  • The blade is damaged. A bent, cracked or thin blade should be replaced, and a shop can match the right part.
  • The bolt is stuck. Forcing it can damage the shaft or spindle.
  • You do not own the tools, or you would rather not buy them for one job.
  • You are not confident about handling the blade or balancing it.

Illinois Extension notes that many lawn service businesses also will sharpen blades.[1] See how much mower blade sharpening costs in Virginia for what drives the price.

The safety part is the same either way

Virginia Cooperative Extension says rotary mower blades rotate at a high speed of 2,000 to 4,000 revolutions per minute.[2] Its rule applies to any blade work: "Disconnect the spark or electric plug before troubleshooting or repairing the mower."[2] Illinois Extension adds that before removing the blades you should disconnect the spark plug or for electric mowers remove the battery.[1]

If you hire someone, ask them to do the same, and to tell you if the blade needs replacing.

What a bad sharpening looks like

Poor work shows up in the lawn. An out-of-balance blade, which Illinois Extension says can create a slight wobble that causes strain on a mower and may result in an uneven cut, will leave a ragged or striped cut and shake the mower.[1] A blade left dull does damage too. Virginia Cooperative Extension says dull blades rip and tear the turfgrass, which promotes disease.[4] Whoever sharpens it, check that the blade is balanced.

A middle path

Buy a second blade. Swap it in, then sharpen the first at your leisure or drop it off. The mower is never out of service, and you can pay a shop for the sharpening without losing a weekend.

Stop and call a pro if

  • The blade is bent, cracked or has a deep nick. Replace it.
  • The mower vibrates after you refit a sharpened blade. The blade may be unbalanced, or the shaft may be bent.
  • The bolt will not come off without force.
  • You cannot safely tip or lift the mower.

Getting help in Virginia

Browse lawn equipment repair answers or see lawn care services services on Loclis.

When you are ready, describe the mower and local small engine shops can quote it.

Common questions

Is it cheaper to sharpen blades myself?
Usually, yes. Illinois Extension says hardware stores commonly sell inexpensive sharpening kits, and a simple file also works.
What if I do it wrong?
The main risks are an unbalanced blade, which strains the mower and cuts unevenly, and injury. Check the balance and disconnect the spark plug first.
Do lawn services sharpen blades?
Illinois Extension says many lawn service businesses also will sharpen blades. Ask what is included.
Should I replace the blade instead?
If it is bent, cracked or worn thin, yes. A shop can match the right part for your mower.
How often should the blade be sharpened?
Virginia Cooperative Extension says every four to six weeks during the mowing season, and more often for zoysiagrass and tall fescue.

Sources

  1. [1] Mower Maintenance, University of Illinois Extension. Checked October 27, 2026.
  2. [2] Lawn Care: Rotary Mower Safety (BSE-42P), Virginia Cooperative Extension, Virginia Tech. Checked October 27, 2026.
  3. [3] 2026 Pest Management Guide: Home Grounds and Animals, Chapter 5: Lawn (456-018, ENTO-634-E), Virginia Cooperative Extension, Virginia Tech. Checked October 27, 2026.
  4. [4] Mowing To Recycle Grass Clippings (430-402), Virginia Cooperative Extension, Virginia Tech. Checked October 27, 2026.

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