Quick verdict
For a walk-behind mower conversion the Oregon 690-521-0 universal 20-inch dethatcher blade is the pick to start with. It ships as a scarifier kit with the blade, fittings, washers and push-on tines, fits most petrol mowers, and is built to stay sharp so it lifts moss and thatch cleanly.
Oregon 690
The Oregon 690-521-0 is a 20-inch universal blade that turns a petrol walk-behind mower into a scarifier, and it comes as a full kit with the blade, fittings, washers and push-on tines. It is designed to fit most petrol mower makes and to stay sharp for cleaner moss and thatch removal. That complete kit makes it the most turnkey conversion here.
Check price on Amazon →The best dethatcher blades compared by mower fit and tine type. Oregon scarifier kits, Arnold multipacks and power-rake tines, so you lift moss and thatch
Why you should trust this guide
Dethatcher blades cover a surprisingly wide range, from a single universal blade that bolts to your mower deck to bags of spring tines and rake teeth for dedicated power rakes. Buying the wrong category is easy, and a mower-deck blade will not help someone whose Bluebird power rake just needs new tines. My aim here is to sort these by the machine they fit so you land on the right wear part.
I do not sell any of these and I gain nothing from your choice. Each pick is judged on the stated dimensions, compatibility and included hardware the makers publish, then grouped by whether it serves a mower conversion, a tow-behind unit or a power rake. Where a listing warns about a specific incompatible model, such as the Honda HRX217, I pass that along directly.
How we evaluated
My first filter is the type of machine each part serves, because that decides whether you even want a blade or a set of tines. I separated mower-deck scarifier blades from power-rake tines and springs, then read the cross-referenced part numbers and compatible model lists to see which mowers and rakes each one fits. I also noted single blades versus bulk packs.
After fit I weighed material and included hardware, favoring durable galvanized or high-performance steel and kits that come with the fittings needed to install. I did not mount these on a mower or run them across a lawn. Instead I compared the published specifications, dimensions and compatibility data, and I flag clearly when a part is a spring or tine rather than the blade some shoppers expect.
What to look for
- The type of machine you own, since mower blades, tow-behind blades and power-rake tines differ
- Blade length and deck size, so the part matches your mower or dethatcher
- Cross-referenced part numbers and any specifically excluded models, like the Honda HRX217
- Whether the kit includes fittings, washers and tines for a complete install
- Single blade versus a bulk multipack, based on how often you dethatch
- Material, with galvanized or high-performance steel resisting wear better
- Whether you actually need a blade, a spring, or replacement rake teeth for your unit
How we test
We base every pick on real-world use, published manufacturer specifications and verified owner feedback. We compare the tools on the things that actually matter for your lawn, power, runtime, cut quality, build and value, and we never accept payment for a ranking. When we have not used a specific model first-hand, we say so.
The picks at a glance
| Tool | Best for | Score | |
|---|---|---|---|
| Oregon 690 | Best Overall | Check price | |
| Arnold Dethatching Blade 21" | Best Value | Check price | |
| TURFZHS 490 | Best Premium | Check price | |
| Feekoon 4 Pack Universal Power Rake Replacement Springs Comp | Best Budget | Check price | |
| Zonon 104 Pcs 373 | Also Great | Check price |
The picks, reviewed
Oregon 690
The Oregon 690-521-0 is a 20-inch universal blade that turns a petrol walk-behind mower into a scarifier, and it comes as a full kit with the blade, fittings, washers and push-on tines. It is designed to fit most petrol mower makes and to stay sharp for cleaner moss and thatch removal. That complete kit makes it the most turnkey conversion here.
Reasons to buy
- Universal mower blade: 20 inch (51cm) replacement blade for clamshell de-thatcher bagger l
- Designed to remove moss and thatch from your lawn: Suitable for semi-professional landscap
- 20" one for all blade: Universal replacement retro fit part, designed to fit most petrol l
- Stays sharp: High performance, durable blade stays sharper for longer. Easy to detach and
- Includes: 1 x Oregon 20 inch Universal Mower Blade. Turns your petrol mower into a scarifi
Reasons to avoid
- Sized for walk-behind petrol mowers, not tow-behind dethatchers
- One blade per kit, so heavy users will restock over time
Arnold Dethatching Blade 21"
The Arnold dethatching blade is the value pick because it ships as a 10-piece pack, which suits large lawns or frequent replacement. It is described as universally compatible with most dethatcher attachments and blades for riding mowers, and it measures around 20 inches long. Buying in bulk lowers the cost per blade for anyone dethatching regularly.
Reasons to buy
- UNIVERSAL COMPATIBILITY: Designed for use with most lawn dethatcher attachments and dethat
- DURABLE CONSTRUCTION: Built with high-quality materials to withstand regular use. Ideal fo
- OPTIMAL DIMENSIONS: Measures 23 in height, 20 in length, and 2.4 in width. Perfect size fo
- EASY TO INSTALL: Simple to attach to compatible lawn aerator machines or dethatcher tow be
- MULTI-PACK VALUE: Includes 10 pieces per package, providing ample supply for multiple deth
Reasons to avoid
- Generic universal fit means you should confirm it matches your unit
- Multipack is more than a one-time light user needs
TURFZHS 490
The TURFZHS is a 16-inch replacement blade with mounting hardware that cross-references part numbers like 490-100-0111 and fits a broad list of Craftsman, Troy-Bilt, Murray, Poulan and Ryobi walk-behind mowers up to 22-inch decks. Included hardware and an adapter make installation straightforward. The wide compatibility earns it the premium slot for walk-behind owners.
Reasons to buy
- Part number: 490-100-0111 645-80116A 490-100-0008 490-100-0012
- Compatible with Craftsman Troy-Bilt Bo-lens Hu-skee Lawn-Boy Mu-rray Po-ulan Ryobi Yard-Ma
- Exceptional performance. The blades sharp, enabling efficient lawn mowing and reducing ove
- Versatile functionality with easy switching. This blade offers multiple functions includin
- High adaptability with easy installation. The blade is equipped with an adapter that perfe
Reasons to avoid
- Explicitly does not fit the Honda HRX217, so verify your model
- Broad fitment list means checking dimensions before ordering matters
Feekoon 4 Pack Universal Power Rake Replacement Springs Comp
This Feekoon 4-pack is not a blade but the replacement springs for a power-rake dethatcher, compatible with Maxpower 330105 and the Arnold 16-inch dethatching blade. If your dethatcher uses spring tines that have fatigued, these are the correct wear part. The SWPB material is described as harder and tougher than ordinary spring stock.
Reasons to buy
- [Compatibility]: Power rake replacement springs fully compatible with Maxpower 330105, com
- [Universal]: Universal power rake replacement spring with 16 inch weed eater blade fits mo
- [Material]: Made of SWPB material, it has higher strength, hardness and toughness than ord
- [Package Includes]: Includes 4 springs
- [Product Size]: 3.93'' L x 1.18'' W x 0.98'' H
Reasons to avoid
- Springs only, so useless if your machine needs the blade itself
- Fits specific Maxpower and Arnold setups, so confirm compatibility
Zonon 104 Pcs 373
The Zonon set is a 104-piece pack of galvanized-steel rake teeth for power rakes and dethatchers, cross-referencing Bluebird 5001 and Billy Goat 350100 machinery. It is aimed at owners of professional-style power rakes who replace worn tines in quantity. The generous count and galvanized construction mean fewer restocks for a busy operator.
Reasons to buy
- Abundant Supply: with a generous 104 pieces of rake teeth, you're well equipped to tackle
- Compatible for Versatility: the rake tines fit varied machinery models, compatible with bi
- Precision and Performance: the power rake tines are about 4 inches in length, 1 inch in wi
- Built to Withstand: crafted from galvanized steel, the dethatcher blades deliver durabilit
- Effortless Installation: with pre drilled holes, the lawn dethatcher tines ensure a seamle
Reasons to avoid
- Designed for commercial power rakes, not consumer mower decks
- Large quantity is overkill for a homeowner with one machine
What to look for
Machine type
Confirm whether you need a mower-deck blade, a tow-behind blade or power-rake tines before buying.
Size and fit
Match blade length and deck size, and check the cross-reference list for your exact model.
Included hardware
Kits with fittings, washers and tines make the conversion or swap far simpler.
Pack quantity
A single blade suits occasional use, while multipacks lower the cost for frequent dethatching.
Material
Galvanized or high-performance steel holds up better against the wear of pulling thatch.
Our verdict
For a walk-behind mower conversion the Oregon 690-521-0 universal 20-inch dethatcher blade is the pick to start with. It ships as a scarifier kit with the blade, fittings, washers and push-on tines, fits most petrol mowers, and is built to stay sharp so it lifts moss and thatch cleanly.
FAQs
Not always. Universal blades fit most petrol walk-behind mowers, but you should still check the length, deck size and any excluded models before ordering.
A dethatcher blade bolts to a mower deck or tow-behind unit, while power-rake tines and springs are the wear parts on dedicated dethatching machines like Bluebird or Billy Goat rakes.
A single blade is fine for occasional home use. A multipack like the Arnold 10-piece makes sense for large lawns or if you dethatch frequently.
Replace it when the edges are worn, bent or no longer lift thatch cleanly. Dull or damaged blades leave thatch behind and stress the machine.
Aggressive dethatching at the wrong time can stress turf. Use a sharp correctly-fitted blade, dethatch during active growth, and avoid going deeper than needed.