PowerSmart 21 in 170cc RWD DB8621S
The cheapest way into a rear wheel drive 3-in-1 gas mower, for sloped lawns on a tight budget. Expect less dealer support than a Toro.
Amazon $339.99$339.99
The PowerSmart 21 in 170cc RWD DB8621S is the better lawn mower overall, rated 3.8 to 3.4. The PowerSmart 21 in 170cc RWD DB8621S leads on value. The EGO LM2135SP Select Cut wins on power. The PowerSmart 21 in 170cc RWD DB8621S costs $409.01 less ($339.99 vs $749).
EGO LM2135SP Select Cut
#15 in Self-propelledFull review
EGO’s best known 21 in self propelled mower, for half acre lawns where you want Touch Drive and blade choice. The cheaper LM2114SP cuts much the same grass.
Amazon $749$749
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.
Which should you buy?
- Choose the PowerSmart 21 in 170cc RWD DB8621S for value ($16.19 per inch of deck ($339.99, 21 in deck) vs $35.67 per inch of deck ($749 with batteries and charger, 21 in deck)).
- Choose the EGO LM2135SP Select Cut for power (420 Wh of battery included vs 170 cc engine).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every self-propelled lawn mower; a clear win is highlighted. How we rank explains each one.
| Factor weight | PowerSmart 21 in 170cc RWD DB8621S | EGO LM2135SP Select Cut |
|---|---|---|
| Overall rating | 3.8/5 | 3.4/5 |
| Value 30% | 100 $16.19 per inch of deck ($339.99, 21 in deck) | 14 $35.67 per inch of deck ($749 with batteries and charger, 21 in deck) |
| Deck 20% | 12 21 in deck | 12 21 in deck |
| Power 15% | 62 170 cc engine | 77 420 Wh of battery included |
| Cutting modes 15% | 100 3 ways to cut: bag, mulch, side discharge | 100 3 ways to cut: bag, mulch, side discharge |
| Warranty 20% | 50 warranty not published (neutral score used) | 100 5-year warranty |
Specifications
| PowerSmart 21 in 170cc RWD DB8621S | EGO LM2135SP Select Cut | |
|---|---|---|
| Cutting | ||
| Deck width | 21 in | 21 in |
| Deck | Steel | - |
| Cutting height | 1.5 to 3.9 in, 6 positions | 1 to 4 in, 8 positions |
| Bag | Yes | Yes |
| Bag capacity | - | 2 bushels |
| Mulch | Yes | Yes |
| Side discharge | Yes | Yes |
| Power | ||
| Power | Gas | Battery |
| Engine or battery | 170 cc | 56 V, 7.5 Ah of battery |
| Battery energy | - | 420 Wh |
| Battery included | - | Yes |
| Runtime | - | 60 min |
| Brushless motor | - | Yes |
| Electric start | No | - |
| Build | ||
| Drive | Rear-wheel drive | Rear-wheel drive |
| Folds upright | Yes | Yes |
| Weight | 59 lb | 55.3 lb (without battery) |
| Warranty | - | 5 years |
| Battery warranty | - | 3 years |