A well-maintained lawn mower blade is the secret to a pristine, healthy lawn. A dull or damaged blade tears grass, leaving it vulnerable to disease and creating a brown, ragged appearance. When it’s time for a replacement, choosing the right blade for your specific GreenWorks model is crucial for performance, safety, and the overall look of your yard.
This roundup simplifies your search by highlighting the best GreenWorks lawn mower blade replacements available. We’ve compiled options for various mower sizes and models, from 14-inch to 25-inch decks, ensuring you can find the perfect fit to restore your mower’s cutting power and keep your lawn looking its absolute best.
The Best GreenWorks Lawn Mower Blade Replacements
- Lawn Mower Blade 21 inch Replacement for Greenworks
- Greenworks Replacement Lawn Mower Blades (Fits 20′ Mower)
- CLSR2U C3203355-01 Lawn Mower Blade for Greenworks
- Greenworks 2952002 Lawn Mower Accessory
- UPOW 19″ Lawn Mower Blade Compatible with Greenworks
- SummerCool 21″ Mower Blade Replacement for Greenworks
- SWAPARTS Lawn Mower Blade for Greenworks 21 inch Mower
- Greenworks Replacement Lawn Mower Blade for 21″ Mowers
- GreenWorks G-MAX 40V 16-Inch Lawn Mower Blade
Lawn Mower Blade 21 inch Replacement for Greenworks
This 21-inch replacement blade is a direct fit for several popular Greenworks models, including the MO40L4413, MO40L03, and MO48L4422. It arrives pre-sharpened, so you can install it and immediately begin achieving a clean, efficient cut that promotes the health of your lawn.
Crafted from a single piece of high-carbon steel, this blade is built for durability. This sturdy construction means it is less likely to wear down or suffer damage during regular mowing, providing reliable performance over an extended period.
Greenworks Replacement Lawn Mower Blades (Fits 20′ Mower)
This set includes both the right and left blades necessary for 20-inch Greenworks mowers (model 25302). The blades are made from heat-treated steel, a process that enhances their hardness and provides a sharper, more precise cutting edge for a superior finish on your grass.
Designed with user maintenance in mind, these blades are easily removable. This feature simplifies the process of sharpening the blades when needed or replacing them in the future, helping you maintain optimal mower performance with minimal effort.
CLSR2U C3203355-01 Lawn Mower Blade for Greenworks
Specifically designed for the Greenworks MO48L2212 14-inch Brushless Cordless Lawn Mower, this blade is identified by part number C3203355-01. Its sleek design is a perfect match for this compact and efficient mower model.
The blade is constructed from strong steel, engineered to balance hardness with endurance. This makes it suitable for frequent use, ensuring your lawn continues to look great season after season.
Greenworks 2952002 Lawn Mower Accessory
For owners of Greenworks 25-inch mowers, this official replacement blade is engineered to deliver a precise cut every time. A clean cut is fundamental to a healthy and visually attractive lawn, and this blade is designed to provide just that.
Made from high-quality steel, this blade is built to handle the demands of regular mowing. Its robust construction promises long-lasting performance. Furthermore, it is designed for a seamless fit, making installation straightforward so you can return to your lawn care quickly.
UPOW 19″ Lawn Mower Blade Compatible with Greenworks
This 19-inch blade is compatible with Greenworks models like the MO40L414, LMF465, and LME476. It is important to note that the actual blade length is slightly shorter than the mower deck size to allow for proper clearance and safe operation.
Manufactured from heat-treated steel, this blade is made for durability. The surface is precision machined and strengthened to improve wear resistance, which extends its service life. This ensures the mower maintains excellent cutting results, even during extended use.
SummerCool 21″ Mower Blade Replacement for Greenworks
This two-pack offers great value, providing a spare blade for future use. It is compatible with a wide range of 21-inch Greenworks mowers, including various 80V, 60V, and 40V models. The blades come pre-sharpened for immediate, efficient mowing.
The durable steel construction is designed to deliver clean, precise cuts and maintain sharpness over time. A powder-coated finish is applied for safety during handling, and this coating will naturally wear off with use, allowing the blade to maintain its sharp edge without requiring immediate sharpening.
SWAPARTS Lawn Mower Blade for Greenworks 21 inch Mower
This blade is designed to fit Greenworks 21-inch mowers with model numbers C3208101, MO40L4413, MO40L03, and MO48L4422. The manufacturer provides specific dimensions (20.08″ length, 1.97″ width, 0.67″ thickness) to help you verify the fit.
It is strongly recommended to compare your old blade with the product images before purchasing to ensure compatibility. This simple step helps guarantee a perfect fit for your mower.
Greenworks Replacement Lawn Mower Blade for 21″ Mowers
This is an official Greenworks replacement part, ensuring a guaranteed fit and performance for a wide array of their 21-inch mowers. It is compatible with numerous 80V, 60V, and 40V models, making it a versatile option for many users.
By choosing an OEM (Original Equipment Manufacturer) part, you can be confident that the blade will meet the exact specifications of your mower. This provides peace of mind regarding performance, safety, and the quality of the cut.
GreenWorks G-MAX 40V 16-Inch Lawn Mower Blade
This replacement blade is designed for the GreenWorks G-MAX 40V 16-inch lawn mower (model 29172). Using the correct blade for this specific model is essential for maintaining its cutting efficiency and overall performance.
As a model-specific part, it ensures a perfect fit and is engineered to work seamlessly with your mower’s deck and motor. Replacing a worn blade with this part will help restore your mower’s ability to deliver a clean, even cut across your lawn.
Buying Guide: How to Pick the Right Blade for Your Mower
When it comes to keeping your lawn looking sharp, the blade on your GreenWorks mower is the star of the show. I have learned that a dull or bent blade does not just give you a bad cut; it stresses your grass and makes it more susceptible to disease. So, picking the right replacement is a bigger deal than it seems. Let us break down what you need to think about before you buy one of the 9 best GreenWorks lawn mower blade replacements for 2025.
First up, you absolutely must know your mower’s model number. This is not a suggestion; it is the most critical step. I cannot tell you how many times I have almost ordered the wrong part because I guessed. The model number is usually on a sticker on the deck of the mower, often near the rear chute or on the underside. Write it down, take a picture, and then cross-reference it with the blade you are looking at. A blade that is even a fraction of an inch too long or has the wrong center hole will not fit, and you will be stuck with a useless piece of metal.
Next, consider the type of blade. Are you replacing a standard mulching blade, a high-lift bagging blade, or a low-lift blade? This choice directly impacts how your mower performs. If you mostly mulch your grass clippings to feed your lawn, you will want a dedicated mulching blade. These are designed with more curves and a longer cutting edge to keep the clippings suspended under the deck for a finer chop. If you prefer to bag your grass, a high-lift blade is your friend. It creates a strong upward airflow to lift the grass and cleanly direct it into the bag. Using the wrong type can lead to clumping, poor bagging, or an uneven cut.
Finally, think about the material and build quality. You are not just buying a piece of steel; you are buying a tool that spins at incredibly high speeds. I always look for blades made from high-carbon steel because they hold an edge longer and are more resistant to wear and impact. Some premium options even have corrosion-resistant coatings or treatments, which is a huge plus if you deal with morning dew or occasionally forget to clean your mower deck. A well-made blade is an investment in a healthier lawn and a mower that does not have to work as hard, saving you trouble down the line.
Frequently Asked Questions
How often should I replace my GreenWorks mower blade?
There is no single answer, as it depends on how much you mow and what your lawn is like. A good rule of thumb I follow is to sharpen the blade at least once or twice a season and consider a full replacement once a year if you have a typical suburban lawn. If you hit a rock, a root, or something hidden in the grass, replace it immediately. A bent blade will throw your mower off balance, causing vibration that can damage the spindle and motor. For a clean cut and a healthy machine, keeping a sharp, straight blade is key, which is why knowing the 9 best GreenWorks lawn mower blade replacements for 2025 is so helpful.
Can I use a non-GreenWorks brand blade on my mower?
Yes, you often can, but you have to be very careful. The aftermarket parts industry is huge, and many companies make excellent, compatible blades. The critical thing is that the blade must match your mower’s exact specifications: length, center hole diameter, and mounting pattern. An off-brand blade that fits perfectly will work just fine. However, I always recommend sticking with OEM (Original Equipment Manufacturer) or highly-rated aftermarket brands to ensure quality and safety.
What is the difference between a mulching blade and a standard blade?
The design is the main difference. A standard blade, often called a 2-in-1, usually has a straight cutting edge and a pronounced wing on each end to create lift for bagging. A mulching blade, or 3-in-1, is typically more curved and has a longer cutting surface. This design creates a vortex under the mower deck that chops the grass clippings into much smaller pieces before they fall back onto the lawn as a natural fertilizer. You cannot get a good mulch with a standard blade, and you will not get good lift for bagging with a mulching blade.
Is it difficult to replace the blade myself?
Not at all! It is one of the easiest DIY maintenance tasks for your mower. The most important safety step is to disconnect the battery completely (for cordless models) or unplug the spark plug wire (for gas models) to prevent any accidental starts. Tip the mower on its side, use a block of wood to jam the blade so it does not spin, and then use a wrench or socket to loosen the center bolt. Remember, the bolt has reverse threads on many models, so you will turn it clockwise to loosen it. Swap the old blade for the new one, making sure the orientation is correct, and tighten the bolt securely.
What are the signs that my mower blade needs replacing?
You will see it and feel it in your lawn’s appearance. Instead of a clean, crisp cut, the tips of your grass will look torn, ragged, or brown. This happens because a dull blade shreds the grass rather than slicing it. You might also notice that your mower is not discharging clippings evenly, leaving clumps of grass on the lawn, or that it seems to be struggling more than usual to get through the grass. A visual inspection for obvious nicks, bends, or a worn-down edge will confirm it is time for a change.