Senix 21 in 144cc 3-in-1 Push AA-M14
#3 in PushFull review
A complete 3-in-1 push mower for small lawns. It is priced close to name brand mowers, so check those first.
Amazon $259.96$259.96
The Senix 21 in 144cc 3-in-1 Push AA-M14 rates 3.9 among push lawn mowers; the PowerSmart B8721S1 Self-Propelled rates 3.4 among self-propelled ones. The Senix 21 in 144cc 3-in-1 Push AA-M14 costs $120.03 less ($259.96 vs $379.99).
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
Prices were last checked November 2, 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 (push and self-propelled), 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 | Senix 21 in 144cc 3-in-1 Push AA-M14 | PowerSmart B8721S1 Self-Propelled |
|---|---|---|
| Overall rating | 3.9/5 | 3.4/5 |
| Value 30% | 77 $12.38 per inch of deck ($259.96, 21 in deck) | 99 $18.09 per inch of deck ($379.99, 21 in deck) |
| Deck 20% | 100 21 in deck | 12 21 in deck |
| Power 15% | 30 144 cc engine | 25 140 cc engine |
| Cutting modes 15% | 100 3 ways to cut: bag, mulch, side discharge | 50 2 ways to cut: bag, mulch |
| Warranty 20% | 25 2-year warranty | 50 warranty not published (neutral score used) |
Specifications
| Senix 21 in 144cc 3-in-1 Push AA-M14 | PowerSmart B8721S1 Self-Propelled | |
|---|---|---|
| Cutting | ||
| Deck width | 21 in | 21 in |
| Deck | Steel | Steel |
| Cutting height | 1.2 to 3.8 in, 6 positions | 1.5 to 3.9 in, 6 positions |
| Bag | Yes | Yes |
| Bag capacity | 1.7 bushels | 1.7 bushels |
| Mulch | Yes | Yes |
| Side discharge | Yes | No |
| Power | ||
| Power | Gas | Gas |
| Engine or battery | 144 cc | 140 cc (Briggs & Stratton E550) |
| Electric start | - | No |
| Build | ||
| Drive | Push | Rear-wheel drive |
| Weight | 54.2 lb | 70 lb |
| Warranty | 2 years | - |