Best Dethatcher Blade For Lawn Mower: Compare 10 Options

#1 · Best Overall

1. MaxPower 330100B

• Weight: 1.6 lb

Best for: Adjustable-fit 16-inch mower owners.

Why it ranks #1: The 16-inch universal power rake blade includes springs, a cover washer, and six reducing washers, offering the clearest mounting-hardware details in this size.

Six reducing washers, spanning 3/16 to 5/8 inch, give the MaxPower 330100B multiple center-hole options for adapting its 16-inch power-rake blade to a mower. It also includes a cover washer and springs, making the supplied mounting pieces a key part of its appeal for owners sorting out blade-shaft sizing.

The 16-inch length and 2-1/4-inch width define the blade's working format, while the 1-inch center hole and six reducing washers provide several stated sizing options for installation. A cover washer and springs are included, so the package supplies more than the blade alone. MaxPower says the blade is manufactured to meet or exceed OEM specifications and identifies it as universal; the washer range still makes checking the mower's shaft dimensions an important fit step.

Skip it if you need a 20-inch dethatcher blade; Oregon's 690-521-0 is the larger listed option, while this blade measures 16 inches.

This suits owners of a mower needing a 16-inch power-rake blade and who value several included washer sizes for mounting. Check the mower's center-hole requirements against the supplied range before choosing it.

Listed on Amazon as: MaxPower 330100B USA MADE 16" Power Rake/Dethatcher Lawn Mower Blade

#2 · Best 20-Inch Kit

2. Oregon 690-521-0

• Weight: 1.3 lb

Best for: 20-inch dethatching kit buyers.

Why it ranks #2: This 20-inch universal blade is intended for most petrol mower makes and includes fittings, washers, push-on tines, and an adapter kit.

The Oregon 690-521-0 pairs a 20-inch universal replacement blade with fittings, washers, and push-on tines, giving homeowners a multi-piece scarifier kit for loosening lawn thatch. Its stated purpose is to remove moss and dead grass so new seed can root, while its fit claim covers most petrol mower makes and models.

The 20-inch blade is presented as a universal retrofit for most petrol lawnmower makes and models, a useful starting point for owners seeking a replacement without a named mower-specific fit. The included adapter kit and dethatching spring add installation and working components beyond the blade itself, and the push-on tines are part of the scarifier kit. Oregon also describes the alloy-steel blade as staying sharp, while its thatch-removal purpose supports lawn preparation before seeding.

Skip it if you use an electric mower; LASER's 19-inch Ready-Fit blade lists walk-behind fit and explicitly excludes electric mowers too, so check another product's specifications.

Choose this if you need a 20-inch dethatcher and want fittings, washers, and push-on tines in the kit. Its stated fit is for most petrol mowers, so owners of other mower types need another fit listing.

Listed on Amazon as: Oregon 690-521-0 Universal 20" Dethatcher Blade

#3 · Best 18-Inch Kit

3. Oregon 690-618-0

• Weight: 1.7 lb

Best for: 18-inch blade-and-adapter kit seekers.

Why it ranks #3: The 18-inch universal blade includes a dethatching spring and adapter kit, giving buyers a useful middle size with specified fitting components.

The Oregon 690-618-0 brings together an 18-inch dethatcher blade, a dethatching spring, and an adapter kit, giving buyers a stated package for both blade replacement and mounting. Oregon says the blade loosens and removes dead grass, a task that can help prepare a lawn for new seed to root and grow.

Its 18-inch blade size gives buyers a concrete dimension to match against their mower, while the included adapter kit and dethatching spring provide additional installation and operating components. Oregon identifies the blade material as alloy steel and describes its action as loosening and removing dead grass. That combination makes this a focused dethatching option for spring lawn preparation, but the listing does not provide a mower-size range, so checking dimensions and mounting needs remains part of the selection process.

Skip it if you need a stated fit range for 19-to-22-inch walk-behind mowers; LASER's Ready-Fit blade lists that range and includes inserts and springs.

This is a reasonable match for owners seeking an 18-inch dethatcher blade with an adapter kit and spring. Confirm that the blade dimensions and mounting arrangement suit your mower, since no mower-size range is listed.

Listed on Amazon as: Oregon 690-618-0 Universal 18" Dethatcher Blade

#4 · Broadest Deck Range

4. LASER Ready-Fit 19-Inch

• Weight: 2.24 lb

Best for: Walk-behind mower conversion buyers.

Why it ranks #4: Its 19-inch blade is listed for walk-behind mowers with 19- to 22-inch blades and includes center-hole inserts and springs.

Center-hole inserts and springs come with the LASER Ready-Fit blade, which is listed for walk-behind mowers with blades from 19 to 22 inches. Those included pieces support its stated role in turning a mower into a dethatcher, while its explicit exclusion of electric mowers gives buyers a clear compatibility boundary.

The 19-inch Ready-Fit blade is listed for walk-behind mower blades from 19 to 22 inches, providing a stated range to compare with an existing setup. Multi-fit center-hole inserts and included springs address mounting and dethatching components together, supporting the product's quick-conversion purpose. LASER explicitly says it is not suitable for electric mowers, an important limitation for owners checking power type. The product's 19-inch length also gives buyers a physical size to consider for storage and handling.

Skip it if you use an electric mower; Oregon's 690-521-0 is another listed dethatcher, but its supplied fit information specifies petrol mowers instead.

This is for owners of 19-to-22-inch walk-behind mowers who want inserts and springs included for a dethatching conversion. It is explicitly unsuitable for electric mowers, so check mower power type first.

Listed on Amazon as: 19 inch(s) Ready-Fit Dethatching Mower Blade

#5

5. Arnold 21-Inch

• Weight: 7.8 lb

Best for: Owners seeking a 21-inch blade.

Why it ranks #5: The 21-inch dethatching blade suits buyers seeking a larger listed size, though the supplied information gives no mounting dimensions or included hardware.

A 21-inch blade is the Arnold Dethatching Blade's clearest distinguishing detail, giving shoppers a specific size to compare with their mower's existing setup. The listing also identifies it as a dethatching blade, so it offers a direct replacement-style option for buyers already searching for that blade format rather than a kit with a broad assortment of fittings.

Arnold's listing names a 21-inch dethatching blade and gives packaged product dimensions of 6 by 2.4 by 23 inches, details that help buyers assess the item before handling or storing it. Its listed weight is 7.8 pounds, a substantial figure to consider when planning installation or moving the product. The available specifications do not describe included springs or adapters, so buyers should base their choice on the stated blade size and the mower's own requirements.

Skip it if you need an included adapter-and-spring kit; Oregon's 690-618-0 lists both alongside its 18-inch blade.

This is for shoppers whose mower setup calls for a 21-inch dethatching blade and who can work with the listed 7.8-pound item. Its supplied details focus on the blade, so account for your mounting needs separately.

Listed on Amazon as: Arnold Dethatching Blade 21"

#6

6. ACTIVLIFE 21–22-Inch

Best for: 21-to-22-inch walk-behind owners.

Why it ranks #6: Its stated application is walk-behind mowers with 21- to 22-inch blades, but the listing provides no center-hole or hardware details.

The ACTIVLIFE blade specifies a 21-to-22-inch walk-behind mower range, giving owners of that mower size a focused replacement option. The listing describes it as a dethatching blade, so its stated use is lawn dethatching rather than a general-purpose blade. Its explicit mower range is the main practical checkpoint before buying.

ACTIVLIFE names walk-behind mowers with 21-to-22-inch blades, which lets buyers compare the stated range with their mower before planning a replacement. The product is identified specifically as a dethatching lawn mower blade, tying the size information to the intended lawn-care task. The listing also asks shoppers to visually inspect the part photo and compare it with the provided dimensions; that check matters because the size range alone does not establish every mower's mounting details.

Skip it if you have a mower outside the stated 21-to-22-inch walk-behind range; LASER's Ready-Fit blade lists walk-behind mowers from 19 to 22 inches.

This fits shoppers with a walk-behind mower in the stated 21-to-22-inch range who want a dethatching blade. Compare the part photo and dimensions with the mower, since the listing does not specify mounting hardware.

Listed on Amazon as: ACTIVLIFE for Dethatching Lawn Mower Blade for Walk-Behind Mowers 21" – 22"

#7

7. TURFZHS 16-Inch

• Weight: 1.76 lb

Best for: Multi-brand 16-inch replacement shoppers.

Why it ranks #7: This 16-inch replacement lists several mower brands and part numbers, but describes multiple functions and provides little dimensional fit information.

The TURFZHS replacement combines a 16-inch blade with stated compatibility across several walk-behind mower brands, including Craftsman, Troy-Bilt, and Ryobi. Its listing also describes multiple lawn tasks, from raking and shredding to mulching and cutting, giving owners looking for a broadly functional replacement several stated uses to weigh alongside the fit information.

The 16-inch format and compatibility list covering brands such as Craftsman, Troy-Bilt, Bolens, Lawn-Boy, Murray, Poulan, Ryobi, Yard-Machines, and Yard-Man help owners narrow the fit question. The listing says it suits mower decks up to 22 inches, but the blade itself is 16 inches, so those figures should not be conflated. Its described functions include mulching, raking, shredding, edging, grass collection, and cutting, presenting a multi-task option rather than a dethatching-only description.

Skip it if you need a 20-inch dethatcher for a Hyper Tough, Daye, or Murray mower; FYNORA-REVIXO lists a 20-inch blade for those brands.

This suits owners of listed walk-behind mower brands seeking a 16-inch replacement with several described lawn functions. Compare the mower's blade and deck requirements carefully, particularly if shopping by deck width.

Listed on Amazon as: 490-100-0111 490-100-0008 16-Inch Detatching Replacement Mower Blade w/Mounting Hardware for Arn-Old Ryobi Craftsman Lawn Mower, Replace 490-100-0012 645-80116A

#8

8. FYNORA-REVIXO 20-Inch

Best for: 20-inch Hyper Tough and Murray owners.

Why it ranks #8: The 20-inch blade names Hyper Tough, Daye, and Murray compatibility and replacement numbers, but does not list mounting dimensions or included adapters.

A powder-coat finish and tungsten-carbide-fused cutting surface distinguish this 20-inch replacement blade, which FYNORA-REVIXO lists for Hyper Tough, Daye, and Murray mowers. The stated compatibility and replacement numbers give owners of those machines concrete fit references, while the extended cutting surface is presented as a way to improve cutting efficiency.

The 20-inch size is specified for push-mower decks, with compatibility named for Hyper Tough, Daye, and Murray; the listing also supplies replacement numbers including 212-9903 and 355-101. That combination gives owners of those mower brands several identifiers to compare. A powder-coat finish is stated to help prevent rust, while tungsten carbide fused to the blade is intended to extend the cutting surface's life. The listing identifies dethatching and mulching tasks as uses.

Skip it if you own a Craftsman, Ryobi, or Troy-Bilt mower; TURFZHS lists compatibility with those brands for its 16-inch replacement blade.

This suits owners of listed Hyper Tough, Daye, or Murray push mowers seeking a 20-inch blade for dethatching and mulching. Match the replacement identifiers and deck size to the mower before selecting it.

Listed on Amazon as: 2105300125A Lawn Mower Blade Replacement 20" Dethatcher Blade Replaces 212-9903 355-101 Compatible with Murray Daye Hyper Tough MNA152701 MNA152505 1 Pack

#9

9. MURNELAP 16-Inch 2-Pack

Best for: 16-inch mower owners wanting a spare.

Why it ranks #9: The two-blade listing targets 16-inch push mowers and references Oregon 690-617-0, but offers few details about fit or supplied mounting components.

A two-pack gives MURNELAP's 16-inch dethatcher blades an immediate replacement advantage: owners can keep a second blade on hand for a later change. The listing identifies the blades for 16-inch push mowers and Oregon 690-617-0 models, making mower size and that model reference the key starting points for shoppers assessing fit.

Each blade is described as a universal 16-inch dethatcher for 16-inch push mowers, with compatibility also tied to 690-617-0 models. That size-specific description helps buyers compare against their mower, while the two-pack provides a spare for replacement without needing to source another blade immediately. MURNELAP says the blades are intended to remove thatch buildup and support consistent mower operation. The listing also advises checking the product appearance, so visual comparison is part of the fit decision.

Skip it if you need a 20-inch dethatcher for a petrol mower; Oregon's 690-521-0 is listed as a universal 20-inch replacement blade for most petrol models.

This suits 16-inch push-mower owners who want a spare dethatcher blade ready for replacement. Compare the mower and blade appearance with the 690-617-0 reference, since the stated fit is size-specific.

Listed on Amazon as: for Oregon 690-617-0 Universal 16" Dethatcher Blade for 16" Push Mowers, 2 Pack

#10

10. MURNELAP 20-Inch

Best for: 20-inch mower owners checking Oregon fit.

Why it ranks #10: This 20-inch replacement references Oregon 690-521-0, but its broad compatibility claim lacks mounting measurements and the component detail of the Oregon listing.

The MURNELAP 690-521-0-compatible blade is specified for 20-inch decks, giving shoppers a direct size reference when replacing a dethatcher blade. Its listing describes the blade as compatible with most models and says it is intended for thatch removal, while also advising buyers to compare the product appearance before selecting it.

A stated 20-inch deck application helps owners screen for size before considering the model reference, 690-521-0. MURNELAP says the blade is compatible with most models and describes its purpose as efficient thatch removal to promote healthier grass growth. The listing also claims precise cutting and easy installation, which may simplify a replacement workflow for buyers whose mower matches. Because the fit language remains broad, comparing the product appearance and mower requirements is still important before installation.

Skip it if you need named brand compatibility for a 20-inch mower; FYNORA-REVIXO lists Hyper Tough, Daye, and Murray compatibility for its 20-inch blade.

This fits shoppers seeking a 20-inch dethatcher blade who can match their mower against the 690-521-0 reference and product appearance. Its fit claim is broad rather than brand-specific, so verify the mower details.

Listed on Amazon as: for Oregon Dethatching Blade, 20" Compatible with Most Models | 690-521-0