Garden & forestry
Dobest DB8721S Self-propelled Lawn Mower
The Dobest DB8721S is a petrol, self-propelled walk-behind mower with a 21-inch cut and a 170 cc engine. It has six central height settings from 1.18 to 3.8 inches, a metal deck with one blade, a 65 L rear bag, and side-discharge and mulching modes. The 170 cc figure is engine displacement; rated power is not listed. Ask Dobest for the engine model, drive speed and weight, decide how you will handle clippings, and compare it with other mowers on a trial cut.
Zhejiang Dobest Power Tools Co., Ltd. ↗
Build my procurement briefChoose how to handle the clippings
Each of the three modes suits a different job. The product page lists no included chutes or mulch plugs and gives no results per mode, so ask Dobest exactly what comes in the carton.
| Mode | What to settle for your job |
|---|---|
| Side discharge | Chute or deflector supplied, operating instructions and where the clippings will land. |
| Mulching | Mulch kit included, the grass and cutting conditions it suits, and the finish you expect. |
| Rear bag | Bag and fitting supplied, how well it collects, and how emptying adds to job time. |
Sources [1]
Published specifications
Read each value with its stated conditions, and ask the manufacturer for any limit not listed here.
| Specification | Published value | Meaning / limit |
|---|---|---|
| Engine displacement | 170 cc [1] | Ask for the engine make and model, rated output, fuel tank size and starting system. |
| Cutting width | 21 inches [1] | Width of cut. Overall machine width is a separate figure to request. |
| Cutting heights | 1.18–3.8 inches; six central settings [1] | Six fixed positions set from one central lever. Ask for the height at each step. |
| Propulsion | Self-propelled [1] | Listed in the Steering row. Ask which axle is driven, the speed range and the controls. |
| Deck and blade | Metal deck; one blade [1] | Request the deck steel grade and thickness and a blade and spindle parts drawing. |
| Wheels | 7 / 10 inches [1] | Two sizes printed; the table does not say which is front or rear. Confirm the layout. |
| Collection | 65 L bag [1] | Bag volume. How often it fills depends on your grass and cutting height. |
| Grass handling | Side discharge, mulching and rear bag [1] | Check which chutes and plugs ship in the box and how to switch modes. |
Drive, handle and storage
Dobest lists self-propulsion and a telescopic, quick-folding handle. The table gives no drive-speed range, transmission layout, weight, folded size or slope limit, and the wheel sizes alone tell you little about traction.
Tell Dobest about your gates, turning space, slopes and storage. Our guide to choosing a self-propelled lawn mower for import shows how to turn those site details into a specification for the quote. Ask for the drive controls and adjustment instructions, the working and folded dimensions, and the operating limits. Put the same list to the maker of any other self-propelled model you shortlist, such as the Sinharbour HG48SMH self-propelled mower. For transport with the handle folded, follow the instructions in the machine manual.
Sources [1]
Run a trial cut on one fixed setup
Cutting width and engine size will not give you area per hour, fuel use, noise or lawn finish. A short trial on your own grass will. Running the same trial on rival models from our garden and forestry section gives you a fair comparison. Including a push-type machine like the DAYEE DY162-131PB-06 hand-push petrol lawn mower shows whether self-propulsion is worth paying for on your ground.
Fix the machine
DB8721S build, engine model, blade, chosen mode and height setting.
Describe the lawn
Grass type and condition, starting and target height, access and ground conditions.
Time the job
Elapsed time, turns, bag emptying and stops, with notes on the finish.
Keep the record
Settings, accessories supplied and results, tied to the build you were quoted.
Sources [1]
Engine and spare parts for this build
The table gives 170 cc but names no engine maker, model or power rating, so emissions approval for your market depends on the engine Dobest fits. The deck and blade entries carry no part numbers.
Ask for the engine model, start system, market documents and the operator and service manual. Get part codes for the blade and spindle, drive belt or transmission, and bag and mulch parts on the quoted build. Packing, support and warranty terms belong on the quotation.
Sources [1]
Buyer questions
How much power does the 170 cc engine make?
Dobest lists displacement only. Ask for the engine model and its rated power. [1]
Which wheels are 7 inch and which are 10 inch?
The table prints both sizes without saying front or rear. Ask Dobest to confirm the layout. [1]
How much lawn can it cut per hour?
No area rate is published. Time a trial cut with your grass, height setting and clipping mode. [1]
Prepare a model-specific brief
Write your actual conditions below. This local worksheet is not sent, uploaded or saved after reload. Copy or print it before leaving.
Sources
Specifications come from the manufacturer's publications listed below, with the date each was checked.
- Dobest official DB8721S product page
manufacturer · Checked 2026-10-11
Full DB8721S spec table: engine size, cut width, heights, drive, deck, wheels, bag and grass-handling modes.
Report a correction through our contact form, quoting DB8721S and the relevant specification.