Choosing the right 20-inch mower blades can improve cut quality, reduce clumping, and extend blade life. This guide highlights five reliable options compatible with common 20-inch decks, including models from MTD, Hyper Tough, Greenworks, and more. Each blade is evaluated on compatibility, material, and performance features to help homeowners pick blades that deliver a clean, even cut with minimal maintenance. Use the following selections to compare fit, steel makeup, and edge design, ensuring you get the best result for your lawn care routine.
| Product | Brand | Compatibility |
|---|---|---|
| Fourtry 942-0640 Blade | Fourtry | 20″ Deck MTD Yard Machines Walk Behinds |
| KOFINAM (1 Pack) Replacement Blade | KOFINAM | 20″ Mower Decks; compatible with MNA152505, MNA152701 |
| Greenworks Replacement Lawn Mower Blades | Greenworks | 20″ Mower (25302 and related models) |
| Grasscool 2105300125A Blade | Grasscool | Hyper Tough Murray 20″ / MNA152505 family |
| Stens 355-101 Standard Blade | Stens | Hyper Tough MNA152701 / 2105300125A compatible |
Fourtry 942-0640 Blade Compatible With 20″ Deck
The Fourtry blade is designed for 20″ deck MTD Yard Machines and similar 20″ MTD models. It replaces OEM numbers 942-0640, 490-100-M115, and 742-0640, ensuring broad compatibility across lightweight walk-behind mowers. Notable features include an advanced cutting edge intended to stay sharper longer and a protective finish to reduce handling injuries during blade changes. The blade’s construction aims to deliver consistent, even cuts over many mowing sessions, minimizing downtime for sharpening and replacement. This option suits users seeking a straightforward replacement that mirrors OEM performance.
KOFINAM 1 Pack Replacement Blade For 20-Inch Deck
The KOFINAM blade is a practical replacement option for 20″ mower decks, listed to fit specific part numbers and compatible with select MNA152-series blades. This blade is marketed as a direct replacement for the 2105300125A family, with emphasis on compatibility across multiple MNA and Hyper Tough configurations. Users should verify the exact original part number before purchasing to ensure a proper fit. The listing notes that it is not produced by Hyper Tough, but remains compatible with corresponding models in the mower family.
Greenworks Replacement Lawn Mower Blades (20-Inch)
Greenworks offers a set of 9.5″ blades designed for their 20-inch mowers, including models MO48L4210 and related ASINs. The package typically includes a left and right blade, with heat-treated steel intended to maintain sharpness and provide durable cutting performance. These blades are intended for easy removal and replacement, helping homeowners quickly return to mowing with minimal downtime. The design balance favors reliability and compatibility with Greenworks’ 20-inch lineup.
Grasscool 2105300125A Blade For Hyper Tough Murray
Grasscool markets this blade specifically as a replacement for the Hyper Tough Murray 2105300125A and related 20″ mowers. The blade specifications include a center hole of 1″ x 3/4″, a length of 20″, a width of 2 1/4″, and a thickness of 0.125″. The listing notes compatibility with MNA152505, MNA152701, and MNA152516, which are common across Hyper Tough and Murray 20-inch deck mowers. This option emphasizes precise measurements to ensure a proper fit and efficient mowing performance.
Stens 355-101 Standard Blade For Hyper Tough Mowers
The Stens 355-101 blade is a standard 20″ replacement blade designed to fit Hyper Tough and related mowers. The blade features a 1″ x 3/4″ center hole and a length of 20″ with a 0.125″ thickness and 2 1/4″ width. As a widely used replacement option, it is often chosen for its compatibility with OEM numbers like 2105300125A and for replacing worn blades on Hyper Tough MNA152701 models. This option provides a dependable, generic alternative when exact OEM parts are difficult to source.
SWAPARTS Lawn Mower Blade 33313250 For Greenworks 20″/21″
SWAPARTS provides a blade designed for Greenworks 20″ and 21″ corded mowers, including models 25022 and 251122. The blade is specified with a 19.69″ length, 1.97″ width, and 0.71″ thickness, accommodating the standard 33313250 interface. While slightly shorter than a 20″ blade, this option targets Greenworks corded mowers with a comparable blade geometry, offering a practical replacement where exact OEM parts are not readily available. Users should verify the mower model number to avoid misfit.
Buying Guide: How To Choose The Right 20-Inch Mower Blade
Key considerations when selecting a 20-inch mower blade include blade style, material, and compatibility with your mower’s model and deck. Different blade shapes influence cut quality, mulching capacity, and lift. Steel composition and edge geometry affect edge retention and sharpness longevity, while a compatible center hole pattern ensures a secure fit to the spindle. Visual checks for thickness, width, and length help prevent mismatches that could stress the engine or create unbalanced cuts.
- Compatibility: Always verify the blade part number against your mower’s manual or OEM specifications. Even small deviations in center hole size or length can cause vibration or unsafe operation.
- Material and hardness: Heat-treated steel blades tend to stay sharper longer and resist wear better in varying lawn conditions. Thicker blades can be more durable but may impact cutting speed or balance.
- Blade edge design: Some blades feature sharpened edges on both sides for even cutting, while others use color-coded or reinforced edges for durability. Consider your mowing needs (regular lawn vs. tall grass) to select accordingly.
- Balance and installation: Balanced blades reduce vibration and wear on the drive system. Follow installation instructions and use proper hardware to secure the blade.
- Maintenance: Routine sharpening and timely replacement prevent ragged cuts and mower strain. Some blades are designed for easier sharpening with removable edges.
When evaluating options, compare the listed compatibility notes to your mower’s model family. For example, blades marketed for Hyper Tough, Murray, or Greenworks 20″ decks may fit several models within those lines, but confirm the exact part numbers and center hole specifications before purchasing. If you own a mower with a mixed-use deck, choosing a blade with robust edge retention and a proven compatibility track record can help ensure consistent lawn results across seasons.