PowerSmart B8721S1 Self-Propelled
#14 in Self-propelledFull review
A low cost rear wheel drive mower with a name brand engine, for sloped lawns up to a third of an acre that you bag or mulch.
Amazon $389.99 PowerSmart $379.99$379.99
The PowerSmart B8721S1 Self-Propelled rates 3.4 among self-propelled lawn mowers; the PowerSmart B8721P Push rates 3.2 among push ones. The PowerSmart B8721P Push costs $30 less ($349.99 vs $379.99).
PowerSmart B8721P Push
#11 in PushFull review
A budget push mower with a name brand engine for small lawns you bag or mulch. The Briggs & Stratton engine makes repairs easier than on unbranded rivals.
Amazon $349.99$349.99
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
These two sit in different drive classes (self-propelled and push), and each is scored against the reference points for its own class, so a rating says how well each does among its own drive peers. How we rank explains each factor.
| Factor weight | PowerSmart B8721S1 Self-Propelled | PowerSmart B8721P Push |
|---|---|---|
| Overall rating | 3.4/5 | 3.2/5 |
| Value 30% | 99 $18.09 per inch of deck ($379.99, 21 in deck) | 39 $17.50 per inch of deck ($349.99, 20 in deck) |
| Deck 20% | 12 21 in deck | 80 20 in deck |
| Power 15% | 25 140 cc engine | 25 140 cc engine |
| Cutting modes 15% | 50 2 ways to cut: bag, mulch | 50 2 ways to cut: bag, mulch |
| Warranty 20% | 50 warranty not published (neutral score used) | 50 warranty not published (neutral score used) |
Specifications
| PowerSmart B8721S1 Self-Propelled | PowerSmart B8721P Push | |
|---|---|---|
| Cutting | ||
| Deck width | 21 in | 20 in |
| Deck | Steel | Steel |
| Cutting height | 1.5 to 3.9 in, 6 positions | 1.5 to 3.9 in, 6 positions |
| Bag | Yes | Yes |
| Bag capacity | 1.7 bushels | 1.4 bushels |
| Mulch | Yes | Yes |
| Side discharge | No | No |
| Power | ||
| Power | Gas | Gas |
| Engine or battery | 140 cc (Briggs & Stratton E550) | 140 cc (Briggs & Stratton E550) |
| Electric start | No | No |
| Build | ||
| Drive | Rear-wheel drive | Push |
| Folds upright | - | Yes |
| Weight | 70 lb | 60 lb |