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Coastal Picks
Greenworks 20" Replacement Mower Blade review
A genuine heat-treated steel replacement blade built specifically for compatible Greenworks 20-inch mowers.
Quick take
This is a genuine Greenworks 20-inch mower blade made from heat-treated steel, compatible with specific Greenworks 20-inch mower models (MO48L4210, MO48L4212, MO48L4210-D and matching ASINs). The actual blade length runs about 1 inch shorter than the mower deck size to maintain clearance between the blade tip and deck.
From our own use
Keeping a spare mower blade is one of the most time-efficient ways I have found to maintain a lawn. When one blade becomes dull, I can install the spare and finish mowing instead of stopping to sharpen it. I then sharpen the removed blade when it is convenient, so there is always one ready to use.
| Brand | Greenworks |
| Material | Stainless steel, heat-treated |
| Cutting width | 20 inches |
| Operation | Manual replacement part |
| Compatible models | MO48L4210, MO48L4212, MO48L4210-D |
Who it's for
Good fit
- Owners of compatible Greenworks 20-inch mowers
- Anyone who wants a spare blade ready to swap in when the current one dulls
- People who prefer sharpening blades on their own schedule rather than mid-task
Skip it if
- Your mower isn't on the listed compatible models — check your specific model number first
Why keep a spare
The real value in owning a second blade is workflow, not just having a backup — swapping a dull blade for a sharp one takes minutes, while sharpening a blade mid-mow means stopping the job entirely. Being a genuine Greenworks part, fit and balance should match the original equipment exactly rather than requiring adjustment.
Pros and cons
Pros
- Genuine Greenworks replacement part
- Heat-treated steel construction
- Lets you swap blades instead of pausing to sharpen mid-mow
- Precise fit for compatible models
Cons
- Only fits specific Greenworks 20-inch mower models — verify compatibility first
- Still requires periodic sharpening once in rotation
Frequently asked questions
What mowers is this blade compatible with?
Specific Greenworks 20-inch mower models — MO48L4210, MO48L4212, and MO48L4210-D.
Is this a genuine Greenworks part?
Yes.
Why is the blade shorter than the deck size?
To allow clearance between the blade tip and the mower deck, roughly 1 inch shorter than the deck.
What material is the blade made from?
Heat-treated steel.