This reads like a typical “viral lawn care hack” article that mixes real advice with a slightly exaggerated “trick” framing.
What is actually true
Some parts are correct:
Sharp blades really do matter
Dull mower blades:
- Tear grass instead of cutting it
- Cause brown, frayed tips
- Stress the lawn
- Can increase disease risk
So yes—keeping blades sharp is important.
The “simple trick” claim (what’s misleading)
There is no reliable safe sharpening method that uses only sandpaper and WD-40 while leaving the blade on the mower.
The described “family trick” is incomplete and potentially unsafe because:
- WD-40 is a lubricant/rust remover, not a sharpening tool
- Sandpaper alone cannot properly re-establish a cutting edge on a steel mower blade
- Proper sharpening requires removing metal evenly and balancing the blade afterward
What actually works (safe methods)
1. Proper sharpening (recommended)
You need:
- Socket wrench (to remove blade)
- File or bench grinder or angle grinder
- Blade balancer
Steps:
- Disconnect spark plug (safety first)
- Remove blade
- Sharpen evenly at the original angle (usually ~30–45°)
- Balance the blade
- Reinstall securely
2. Professional sharpening
- Often inexpensive
- Ensures correct balance and angle
- Good if you don’t have tools or experience
3. Quick maintenance (not sharpening)
You can:
- Clean grass buildup
- Lightly remove rust
- Wipe with oil to prevent corrosion
But this does not replace sharpening.
Safety warning
Never try to “sharpen” blades while they are still attached to the mower. That can:
- Damage the blade
- Cause vibration issues
- Increase injury risk
Bottom line
The article is partly right about lawn care importance, but the “simple trick” is oversold. Real blade sharpening requires proper removal, controlled grinding or filing, and balancing.
If you want, I can show a step-by-step beginner-safe sharpening method using just a file, which is the simplest legitimate DIY option.
