Senix 21 in 170cc FWD A025054-A
A 3-in-1 self-propelled mower for flat lawns with lots of trees and beds to steer around.
Amazon $399.99$399.99
The Senix 21 in 170cc FWD A025054-A is the better lawn mower overall, rated 3.6 to 3.4. The Senix 21 in 170cc FWD A025054-A leads on cutting modes, power and value. The SKIL PWR CORE 40 20 in Self-Propelled wins on warranty. The Senix 21 in 170cc FWD A025054-A costs $40 less ($399.99 vs $439.99).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
SKIL PWR CORE 40 20 in Self-Propelled
#12 in Self-propelledFull review
A low cost self propelled 20 in mower with a long warranty, for lawns up to about a third of an acre.
Amazon $439.99$439.99
Which should you buy?
- Choose the Senix 21 in 170cc FWD A025054-A for cutting modes (3 ways to cut: bag, mulch, side discharge vs 2 ways to cut: bag, mulch), power (170 cc engine vs 240 Wh of battery included) and value ($19.05 per inch of deck ($399.99, 21 in deck) vs $22 per inch of deck ($439.99 with batteries and charger, 20 in deck)).
- Choose the SKIL PWR CORE 40 20 in Self-Propelled for warranty (5-year warranty vs 2-year warranty).
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 | Senix 21 in 170cc FWD A025054-A | SKIL PWR CORE 40 20 in Self-Propelled |
|---|---|---|
| Overall rating | 3.6/5 | 3.4/5 |
| Value 30% | 93 $19.05 per inch of deck ($399.99, 21 in deck) | 75 $22 per inch of deck ($439.99 with batteries and charger, 20 in deck) |
| Deck 20% | 12 21 in deck | 0 20 in deck |
| Power 15% | 62 170 cc engine | 26 240 Wh of battery included |
| 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 | 100 5-year warranty |
Specifications
| Senix 21 in 170cc FWD A025054-A | SKIL PWR CORE 40 20 in Self-Propelled | |
|---|---|---|
| Cutting | ||
| Deck width | 21 in | 20 in |
| Deck | Steel | - |
| Cutting height | 1.2 to 3.8 in, 6 positions | 1.5 to 4 in, 7 positions |
| Bag | Yes | Yes |
| Bag capacity | 1.7 bushels | 1.7 bushels |
| Mulch | Yes | Yes |
| Side discharge | Yes | No |
| Power | ||
| Power | Gas | Battery |
| Engine or battery | 170 cc | 40 V, 6 Ah of battery |
| Battery energy | - | 240 Wh |
| Battery included | - | Yes |
| Runtime | - | 50 min |
| Brushless motor | - | Yes |
| Build | ||
| Drive | Front-wheel drive | Rear-wheel drive |
| Folds upright | - | Yes |
| Weight | 61.7 lb | - |
| Warranty | 2 years | 5 years |
| Battery warranty | - | 2 years |