Best Sun Joe Electric Dethatcher & Scarifier
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If you are looking for best sun joe electric dethatcher and scarifier, the listing describes a corded electric machine with a 12-amp motor, a 12.6-inch cutting width, five depth settings and an 8-gallon collection bag. That profile suits a homeowner with a thatch layer on a small or medium lawn who wants to avoid a gas unit. The listing does not state a warranty term, a cord length or a voltage, and the university sources we opened do not say how much thatch one pass removes. Measure the thatch first, because that decides whether this machine is the right tool.
Quick answer
- The listing says the corded 12-amp motor drives a 12.6-inch cutting width, with five depth settings.
- The listing describes the 8-gallon bag as detachable. It does not state how fast the bag fills.
- Penn State Extension says thatch layers of an inch or more need physical removal, so measure before you buy.
- Penn State Extension advises removing cool-season thatch in late summer or early fall, and not when the turf is stressed.
The product at a glance
The table lists what the listing states for the corded 12.6-inch set, which is the set the product page opens to by default. Where the listing is silent, the cell says not stated. The same page offers three other sets, one cordless and two 15-inch corded sets, so check the set name before you order.
| Item | What the listing states |
|---|---|
| Brand | Sun Joe |
| Model | AJ801E |
| Power source | Corded electric, 12-amp motor |
| Cutting width | 12.6 inches |
| Depth settings | 5 positions (the listing also calls them height settings) |
| Operation mode | Manual |
| Tines | Durable spring steel tines; material listed as alloy steel |
| Collection | 8-gallon detachable collection bag |
| Item weight | 27 pounds |
| Product dimensions | 24 x 20 x 12.5 inches (D x W x H) |
| Voltage | not stated |
| Cord length | not stated |
| Battery | not stated for this set |
| Warranty | Warranty information linked as a PDF; term not stated |
| Other sets on the page | Corded 15.0-inch with 13-amp or 15-amp motor; cordless 15.0-inch |
| Height range | not stated |
Two calculations use only the listing’s figures. The 12.6-inch cutting width is 1.05 feet, so a lawn 25 feet wide needs about 24 passes (25 divided by 1.05 is 23.8, rounded up). If each pass runs 40 feet, that is about 960 feet of travel before any overlap. The listing does not state a removal rate, so the pass count is a planning figure, not a time estimate.
The machine body is 24 inches deep and 20 inches wide, which is 480 square inches, or 3.3 square feet (480 divided by 144). That is the floor space the listing’s dimensions describe, and it is the figure to check against the space in your shed or garage.
What causes thatch, and what a dethatcher does about it
Thatch is a layer of living and dead stems, roots and shoots that sits between the green grass and the soil. Penn State Extension says it builds up when a lawn produces organic debris faster than the soil can break it down. The parts that resist decay most, such as stem nodes, crowns and roots, make up most of it.
Penn State names Kentucky bluegrass, creeping red fescue and creeping bentgrass as thatch producers. It says perennial ryegrass and tall fescue are bunch-type grasses that do not produce significant thatch. Check which grass your lawn has before you decide that the layer is the problem.
The sources name cultural causes as well. Illinois Extension says excessive nitrogen fertilizer or overwatering frequently contributes to thatch by making lawns grow too fast. Both Illinois Extension and Penn State Extension say grass clippings are not the usual cause, so leaving clippings on the lawn is not the fix to chase.
Penn State lists core aeration as an important preventive practice, because it relieves compaction and improves air movement into the soil, which supports the microbes that break thatch down. The listing’s aeration claim is a different kind of statement. The sources we opened do not show that a scarifying pass gives the same benefit.
Penn State describes two physical removal tools, vertical mowers and power rakes. Power rakes have vertically rotating wire tines and are better suited to smaller jobs, because they lack the power and durability of vertical mowers. The listing describes spring steel tines rather than wire tines, so that comparison is only partial. It is still the closest guidance in the sources we opened.
Illinois Extension puts the point plainly: thatch may be torn out with a dethatcher or vertical mower, but it will most likely return unless the cause is corrected. A dethatcher clears the layer. It does not change the fertilizer, watering or soil conditions that built it.
Who it suits
This machine suits a homeowner whose thatch layer measures under an inch and whose lawn sits within reach of an outlet. Penn State Extension says that when thatch layers reach an inch or more, preventative practices will not provide adequate control, so a shallow layer is the realistic target for a machine in this class.
It also suits a buyer who wants an electric tool and no fuel system to maintain. The listing gives the power source as corded electric and mentions no fuel. The listing also claims that the scarifying action improves airflow and nutrient absorption. The sources we opened do not confirm that claim, so treat it as the listing’s statement only.
A buyer who will also mow and bag afterwards should compare a bagged electric mower. Our guide to small electric lawn mowers with bags covers the other half of that job.
Skip it if
- Your thatch layer is an inch or more deep. Penn State Extension says preventative practices will not adequately control layers that thick, and the listing does not state how much a single pass removes.
- You need a cordless machine. The cordless set on the same page is a 15.0-inch model, not the corded 12.6-inch set this post covers.
- Your lawn is large. At the stated width, a lawn 25 feet wide already takes about 24 passes.
- No outlet can reach the lawn. The listing does not state a cord length, so you would have to find one yourself.
Buying checklist
- Dig a small plug of turf and measure the brown layer between the soil and the green grass. That number decides the rest of the purchase.
- Confirm the set name on the product page. The 12.6-inch corded set is the one this post covers.
- Ask the seller which power cord to use, since the listing states no cord length or gauge.
- Get the warranty term in writing. The listing links a PDF and gives no term.
- Plan for reseeding. Illinois Extension says overseeding is usually required after mechanical dethatching.
Safe use before you start
The listing’s safety panel gives one line: Keep away from Children. It gives no cord, outlet or grounding guidance, so read the user manual (PDF) before you connect the machine. Keep children out of the work area for the whole job, including the walk back to the outlet.
Start conservatively. Penn State Extension advises that it may be necessary to set the blades high at first and remove only a small amount of thatch in the first pass, because that lets you see how much thatch remains and how much the turf is thinning. That advice is written for vertical mowers, but the same logic applies to any depth-adjustable dethatcher. Begin in an area that is not highly visible.
Keep the turf healthy while you work. Penn State Extension says not to remove thatch when turf is weak or under heat or drought stress, because that raises the chance of injury and lowers recovery. Illinois Extension also warns that mechanical dethatching is hard on the lawn, because roots sit in the thatch rather than in the soil.
What the listing does not say
The listing is a product page, so its gaps matter as much as its claims. It gives no voltage, no cord length and no cord gauge. If the machine will run from an outdoor outlet, the extension cord guide for electric lawn mowers explains general cord choice. That guide is written for mowers, not dethatchers, so check this machine’s manual before buying a cord.
It also gives no removal depth in inches. The five settings are described only as positions, so the listing does not say how much thatch each one removes. The bag’s fill rate is not stated, and the listing gives only its size. The warranty is linked as a PDF with no term given. The other sets on the page have different widths and motors, and the listing does not say how their accessories differ.
How we chose
This post covers one product: the Sun Joe Electric Dethatcher and Scarifier, Corded, with 8-Gal Bag, model AJ801E, ASIN B01FEATL2I. It was assigned to this site under the category Trimmers, Edgers and Blowers. The site’s stored product data did not include this ASIN, so the listing was read directly on 2026-10-22, and its title, bullets and specifications were saved for this draft. The product table covers only the corded 12.6-inch set.
We did not rank this model against other dethatchers, and the post does not call it the best option. The thatch limits and timing come from two university extension pages written for home lawns. The criteria were the stated cutting width, the stated power setup, and the thatch depth at which the university sources say physical removal becomes necessary.
What we could not verify
The sources we opened do not say how much thatch this machine removes in one pass, how deep its tines reach at each setting, or how it performs on a lawn that is wet, dry or dormant. The listing does not state those figures either, and this post does not supply them.
The manufacturer’s user manual (PDF) was not opened in this review, and neither were the manufacturer’s product pages. The cord, safety and warranty details therefore rest on the listing alone. The warranty term is unknown, and the listing’s aeration claim is not confirmed by the sources we opened.
FAQ
Does this dethatcher remove thatch or only rake the surface?
The listing says the depth settings let you adjust dethatching and scarifying depth to remove the thatch layer. The sources we opened do not measure how much this machine removes. Start at a shallow setting on a small area, then check the result before you work the whole lawn.
How thick does thatch have to be before it needs removal?
Illinois Extension describes excessive thatch as more than half an inch thick. Penn State Extension says that when thatch layers reach an inch or more, preventative practices will not provide adequate control, and the thatch must be physically removed.
When is the best time to run it?
Penn State Extension says to remove thatch from cool-season turfgrass during late summer or early fall, when temperatures are cooler. It also says not to remove thatch when the turf is weak or under heat or drought stress.
Will I need to reseed after dethatching?
Probably. Illinois Extension says mechanical dethatching is destructive because roots are in the thatch rather than the soil, and that overseeding is usually required afterwards.
Does the listing give cord or outlet guidance?
No. The listing gives no voltage or cord length, and its only safety note is a line about keeping the machine away from children. Read the user manual (PDF) before you connect the machine.
Is there a warranty, and how long does it run?
The listing links warranty information as a PDF but does not state a term. Ask the seller for the term in writing before you buy.
Bottom line
Buy the corded 12.6-inch Sun Joe only if your thatch measures under an inch and an outlet can reach the lawn. Decision rule: if the thatch layer is an inch or more, skip this machine and plan for physical removal with a larger tool.
Sources
- Amazon listing, Sun Joe Electric Dethatcher & Scarifier, Corded, with 8-Gal Bag, AJ801E (opened 2026-10-22) https://www.amazon.com/dp/B01FEATL2I
- Managing Thatch in Lawns, Penn State Extension (opened 2026-10-22) https://extension.psu.edu/managing-thatch-in-lawns
- Managing Thatch in Lawns, Illinois Extension (opened 2026-10-22) https://extension.illinois.edu/lawns/managing-thatch-lawns
