Nothing feels better than stepping back to admire a freshly mowed lawn. But if your mower blades are dull, that clean, crisp cut can quickly turn into a ragged mess. Keeping blades sharp isn’t just about looks—it helps your grass stay healthy and your mower run more efficiently.
Not sure if it’s time to sharpen up? Here are 5 clear signs your mower blades need attention, plus quick tips on how to fix the problem.
1. Torn or Shredded Grass Tips
Instead of a neat, clean slice, dull blades tear at the grass, leaving behind jagged edges. This not only looks bad (your lawn may take on a whitish tint) but also weakens the grass, making it more prone to disease.
Quick fix: Stop mowing and inspect the blades. If they feel dull to the touch or you see nicks along the edge, it’s time to sharpen.
2. Uneven Grass Height
If your lawn looks patchy or uneven after mowing, dull or damaged blades might be to blame. Sharp blades create an even cut across the full mowing width, while dull ones can leave stray patches of longer grass.
Quick fix: Balance your blade after sharpening to ensure it cuts evenly across the full deck.
3. Your Mower is Working Harder
Notice your mower bogging down more than usual or using more fuel? Dull blades make your mower work harder, putting strain on the engine and reducing efficiency.
Quick fix: Regular blade maintenance (every 20–25 mowing hours) keeps your mower running smoothly and saves fuel.
4. Brown or Yellow Lawn Tips
A healthy lawn should stay a consistent green after mowing. If your grass turns brown or yellow at the tips a day or two later, dull blades may be causing damage as they tear rather than cut.
Quick fix: Sharpen blades at least once a season—or more often if you mow frequently or tackle tough grass.
5. You Can’t Remember the Last Time You Sharpened Them
If it’s been a while (or you can’t recall at all), chances are your blades are overdue. Even the best blades lose their edge over time, especially with regular use.
Quick fix: Set a reminder to inspect and sharpen your blades regularly, whether you DIY or take them to your local dealer.
Sharpening Safety 101:
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Always disconnect the spark plug before working on your mower.
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Wear heavy gloves and eye protection.
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Support the blade securely when removing or sharpening.
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If you’re unsure, your local dealer can sharpen or replace blades quickly and safely.
The Bottom Line:
Sharp mower blades mean a healthier, better-looking lawn and a smoother mowing experience. Spring is the perfect time to check your blades and get ahead of potential problems. Your lawn—and your mower—will thank you!