Quick Verdict: The Brinly DT-402BH-A 40-inch Tow-Behind Dethatcher earns its 4.4/5 stars from 147 reviews with a wide 40-inch working width, dual dethatch/scarify modes, and a true transport mode for crossing driveways. At $207, it’s an investment rather than an impulse buy — but for homeowners with a riding mower, tractor, ZTR, or ATV and more than a half-acre of thatch-prone turf, it’s one of the most versatile tow-behind dethatchers in its class.
Brinly DT-402BH-A Tow Behind Dethatcher 40"
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Key Specs at a Glance
| Spec | Detail |
|---|---|
| Model | Brinly DT-402BH-A |
| Working Width | 40 inches |
| Tines | 2 rows of 10 independently flexing triple-coil spring steel tines (20 total) |
| Tine Material | 3/16-inch spring steel, pre-assembled on tray |
| Modes | Dethatch, aggressive scarify, and transport (raised) |
| Weight Tray Capacity | Up to 70 lbs. additional ballast |
| Wheels | Transport wheels with diamond rubber tread, never-flat design |
| Hitch | Universal hitch pin with adjustable drawbar mounting |
| Compatibility | Most riders, lawn/garden tractors, ZTRs, and ATVs |
| Price / Rating | $207 / 4.4 out of 5 stars (147 reviews) |
| Brand Heritage | Lawn and garden products made in the USA since 1839 |
Overview: Who Is This Dethatcher For?
The Brinly DT-402BH-A is built for homeowners who want to reduce lawn thatch with a tow-behind attachment instead of a walk-behind tool. If your lawn has a layer of dead grass, roots, and debris that blocks water and nutrients from reaching the soil, this dethatcher lifts that material up so it can be mowed, mulched, or raked away afterward. What this means for you is… you’re buying a lawn-recovery tool, not just a surface groomer.
The 40-inch working width and two rows of ten independently flexing spring steel tines comb through grass and pull thatch to the surface. The tines are made from 3/16-inch spring steel and arrive pre-assembled on the tray, which cuts setup time significantly. What this means for you is… less time in the garage with an instruction manual, more time working the lawn.
Flexibility is where this model separates itself. In standard mode, the tines act as a straight dethatcher, lifting thatch out of the canopy. In the more aggressive mode, they scrape and scarify the soil surface — ideal prep for overseeding. Add in transport mode, which raises the tines for crossing sidewalks, driveways, and paths, and one attachment covers routine dethatching, seedbed preparation, and travel across hard surfaces.
Construction is equally serious: an all-steel frame, a weight tray that accepts up to 70 lbs. of ballast for deeper tine penetration, and never-flat transport wheels with diamond rubber tread. A universal hitch pin and adjustable drawbar mounting system fit most riders, tractors, ZTRs, and ATVs, and Brinly has been building lawn and garden products in the USA since 1839 — a long track record that matters for parts support and consistency.
We compared this side by side in our gaomon 42-inch tow behind lawn sweeper review, and our team also has a full breakdown of the smartlink 40-inch tow behind plug aerator review if you’re building out a full tow-behind lineup.
Pros & Cons
Pros
- Wide 40-inch working path speeds up coverage. More ground per pass than narrower attachments means large yards get finished in fewer passes, saving time and fuel.
- Two working modes add real flexibility. Switch between standard dethatching and aggressive scarifying, making the same implement useful for both routine maintenance and seedbed prep before overseeding.
- Transport mode improves practicality. Raise the tines when crossing driveways, walkways, and paths — no stopping to remove the attachment or dragging tines where they shouldn’t be.
- Steel construction supports tougher work. The all-steel frame and 70-lb weight tray provide the structural strength needed for heavy thatch removal and aggressive settings.
- Spring steel tines are built for repeated seasons. The 20 triple-coil tines flex rather than snap under normal operation — a tool designed to last, not a disposable attachment.
- Universal hook-up broadens compatibility. The included hitch pin and adjustable mounting positions fit a wide range of tractors and tow machines, reducing fitment headaches.
- Pre-assembled tines reduce setup friction. Tines arrive attached to the tray, so you skip the most tedious part of assembly and get to work sooner.
Cons
- The price is not low. At $207, this is an investment compared with smaller or lighter-duty tow-behind options — overkill for tiny lots.
- Requires towing equipment. You’ll need a riding mower, tractor, ZTR with hitch capability, or ATV; there’s no push option.
- Ballast is not included. You’ll need to supply your own weight (bricks, weights, etc.) to maximize tine penetration on heavier thatch.
Frequently Asked Questions
Will the Brinly DT-402BH-A fit my riding mower or ZTR?
Very likely, yes. It ships with a universal hitch pin and an adjustable drawbar mounting system designed to fit most riders, lawn and garden tractors, zero-turn mowers, and ATVs. Check that your machine has a standard rear hitch receiver before ordering.
What is transport mode, and why does it matter?
Transport mode raises the tines off the ground so you can cross driveways, sidewalks, and paths without scraping the tines or damaging hard surfaces. It’s a real time-saver on properties with multiple surfaces — you don’t have to stop and disconnect anything mid-job.
Do I need to add weight to the tray?
For light thatch, the tines’ spring tension alone may be enough. For thicker, matted thatch, adding up to 70 lbs. of ballast (bricks, cinder blocks, or weight plates) to the tray pushes the tines deeper for more aggressive thatch removal. Weight is not included.
Can I use this dethatcher for overseeding prep?
Yes. In its more aggressive scarify mode, the tines scrape and open the soil surface, creating ideal seed-to-soil contact for overseeding. Run it in scarify mode, spread seed, and water according to your seed variety’s needs.
How is it assembled out of the box?
Setup is easier than most competitors because the 20 spring steel tines come pre-assembled on the tray. You’ll mainly be attaching the frame, wheels, hitch, and weight tray — most owners report straightforward assembly with basic hand tools.
When is the best time to dethatch my lawn?
Dethatch during your grass type’s active growing season — late spring or early fall for cool-season grasses, late spring through early summer for warm-season grasses. University extension services generally recommend dethatching only when thatch exceeds about 1/2 inch, since some thatch actually benefits the lawn.
Final Thoughts
The Brinly DT-402BH-A isn’t the cheapest tow-behind dethatcher on the market, but it’s one of the few that combines a 40-inch width, dual dethatch/scarify modes, true transport mode, and a 70-lb ballast-ready steel frame at this price point. If you already own a tractor or riding mower and your lawn battles recurring thatch, it’s a smart long-term investment backed by a brand that’s been in the business since 1839.
