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This comparison covers the powersmart 21 inch 170cc self propelled gas vs 22 inch 140cc self propelled gas models. Both mowers share a 3-in-1 mowing system, rear-wheel drive, and a six-position height adjustment range from 1.5 to 3.9 inches. They also both feature steel decks and foldable handles for storage. The main differences lie in the engine displacement and the cutting width. You need to decide which combination of power and coverage fits your lawn size best.
Cutting Width
21 inches
22 inches
Engine Displacement
170cc
140cc
Engine Brand
PowerSmart
Briggs and Stratton
Weight
59 pounds
72 pounds
Color
Black
Red
Choose the first if
- You prefer a lighter mower that is easier to maneuver and store.
- You want more engine displacement for potentially better performance in thick grass.
- You have a smaller lawn where the 21-inch cut is sufficient.
Choose the second if
- You want the widest possible cut to reduce mowing time on larger areas.
- You prefer a Briggs and Stratton engine known for specific reliability traits.
- You do not mind the extra weight for a more stable build.
Verdict
The 170cc model offers more raw engine power and is significantly lighter, making it easier to handle. The 22-inch model provides a wider cutting path, which can speed up mowing on larger, flatter lawns. Choose the one that best balances your need for power versus coverage width.
Engine Power and Cutting Width
Engine Displacement
Edge: PowerSmart 21-Inch 170cc Self-Propelled Gas Mower
PowerSmart offers two distinct engine options here. The 21-inch model features a 170cc 4-stroke OHV engine with auto choke and recoil start. This higher displacement generally provides more torque for thick or wet grass. The 22-inch model uses a 140cc Briggs and Stratton E550 engine with a Prime 'N Pull start system. While the displacement is lower, the Briggs and Stratton brand is known for reliability. You get 30cc more power with the smaller deck model, which may help in challenging conditions.
Cutting Width
Edge: PowerSmart 22-Inch 140cc Self-Propelled Gas Mower
Deck size affects how many passes you need to mow your lawn. The PowerSmart 22-inch model has a wider 22-inch cutting width, allowing you to cover more ground per pass. This can reduce mowing time on larger, open lawns. The 21-inch model has a 21-inch cutting width. While the difference is only one inch, that extra width adds up over time on bigger properties. If you have a wide, flat yard, the larger deck is more efficient. For tighter spaces, the narrower deck might be easier to maneuver.
Build Weight
Edge: Tie
Weight impacts stability and storage. The 22-inch model weighs 72 pounds, while the 21-inch model weighs 59 pounds. The heavier unit may feel more stable on slopes due to the increased mass, complementing its rear-wheel drive system. However, the lighter 21-inch model is easier to lift and move. This matters if you need to carry it up stairs or into a small shed. The 13-pound difference is significant for handling. You will notice the weight difference when maneuvering or storing the mower.
Height Adjustment
Edge: Tie
Both mowers offer identical height adjustment capabilities. Each model features a 6-position dual-lever control system. The cutting height ranges from 1.5 inches to 3.9 inches on both units. This allows you to customize the cut for different seasons or grass types. The mechanism is the same, so ease of use is equal. You get the same range of options regardless of which deck size you choose. This spec is a tie, as neither model offers an advantage in cutting height versatility.
Mowing Functions
Edge: Tie
Versatility in grass management is similar for both. Both the 21-inch and 22-inch models support a 3-in-1 system. You can choose between mulching, side discharge, and rear bagging. The 22-inch model specifically mentions a 1.4-bushel capacity grass bag, which is useful for collecting clippings. The 21-inch model also supports rear bagging. Both allow you to adapt to seasonal lawn conditions. The core functions are the same, giving you equal flexibility in how you dispose of or reuse your grass clippings.
Which mower fits your lawn needs
Users with thick or wet grass
Our pick: PowerSmart 21-Inch 170cc Self-Propelled Gas Mower
The 170cc OHV engine delivers higher displacement than the 140cc unit. This extra power helps cut through dense turf efficiently. The auto choke and recoil start ensure reliable ignition. You will spend less time wrestling with the mower in tough conditions.
Those wanting a wider cutting path
Our pick: PowerSmart 22-Inch 140cc Self-Propelled Gas Mower
The 22-inch steel deck covers more ground per pass than the 21-inch model. This wider cut reduces the number of passes needed for large lawns. The Briggs and Stratton engine offers consistent performance. You get efficient mowing with a broader sweep each time.
People prioritizing easier maneuverability
Our pick: PowerSmart 21-Inch 170cc Self-Propelled Gas Mower
This model weighs 59 pounds, which is lighter than the 72-pound alternative. The reduced weight makes it easier to push and lift. The foldable handle adds convenience for storage. You will find it simpler to handle on slopes and during transport.
PowerSmart 21-Inch 170cc Self-Propelled Gas Mower
Best for: small lawns with slopes
- Cutting Width
- 21 in
- Drive Type
- Self-propelled (rear-wheel drive)
- Mowing Functions
- 3-in-1 (mulch, side discharge, bag)
- Motor Type
- 4-stroke OHV, 170 cc
- Height Adjustments
- 6 positions (1.5" – 3.9")
- Power Type
- Gas
This PowerSmart mower features a 170cc 4-stroke engine and a 21-inch steel deck. It uses rear-wheel drive for traction on slopes. You get three mowing modes: mulch, side discharge, or bagging. The cutting height adjusts in six positions from 1.5 to 3.9 inches. It weighs 59 pounds and folds for storage. This model suits small to medium lawns needing reliable power.
- 170cc OHV 4-stroke engine handles thick grass
- Rear-wheel drive offers strong traction on uneven terrain
- Steel deck provides durable construction
- Six height positions allow precise cutting control
- Folds for compact storage
- 21-inch cutting width is narrower than the 22-inch competitor
- 170cc engine displacement is higher than the 140cc alternative but the deck is smaller
- Weighs 59 pounds, which is heavier than some lighter models
- You need rear-wheel drive for slopes
- You want a steel deck for durability
- You prefer a 21-inch cutting width
- You need a wider 22-inch cutting deck
- You prefer a lighter mower under 50 pounds
- You want an electric power source
Verdict: PowerSmart 21-Inch 170cc Self-Propelled Gas Mower fits users who prioritize traction and durability on uneven ground. It is ideal for small yards where a 21-inch deck is sufficient.
PowerSmart 22-Inch 140cc Self-Propelled Gas Mower
Best for: Medium lawns needing wider cuts and slope traction
- Cutting Width
- 22-Inch
- Drive Type
- Self-Propelled
- Mowing Functions
- 3-in-1
- Motor Type
- 140cc Briggs and Stratton E550 Engine
- Height Adjustments
- 6-position, 1.5in. to 3.9 in.
- Power Type
- Gas
This PowerSmart mower features a 22-inch cutting width and a 140cc Briggs and Stratton E550 engine. It uses rear-wheel drive self-propelled technology to handle slopes. You get a 1.4-bushel bag and three mowing functions. The steel deck offers six height settings from 1.5 to 3.9 inches. It weighs 72 pounds. This model suits users who prefer a wider cut but do not need maximum engine power.
- 22-inch seamless stamped steel deck for wider cuts
- 140cc Briggs and Stratton E550 engine with Prime 'N Pull start
- Rear-wheel drive self-propelled system for inclines
- 6-position height adjustment from 1.5 to 3.9 inches
- 1.4-bushel grass bag with 3-in-1 mulching and bagging
- 140cc engine displacement is lower than the 170cc competitor
- 72-pound weight adds bulk compared to lighter models
- 22-inch width requires more turning space in tight areas
- You have a medium-sized lawn and want a wider cut
- You need reliable rear-wheel traction on slopes
- You prefer a simple 3-in-1 mowing system
- You require the highest engine power for thick grass
- You need a lighter mower for easy storage
- You have very tight spaces requiring a narrower deck
Verdict: PowerSmart 22-Inch 140cc Self-Propelled Gas offers a wider 22-inch cut and reliable rear-wheel drive. It fits homeowners who prioritize deck width over engine displacement. The 140cc engine provides adequate power for standard maintenance tasks.
Specifications side by side
| Spec | PowerSmart 21-Inch 170cc Self-Propelled Gas Mower | PowerSmart 22-Inch 140cc Self-Propelled Gas Mower |
|---|---|---|
| Cutting Width | 21 in | 22-Inch |
| Drive Type | Self-propelled (rear-wheel drive) | Self-Propelled |
| Mowing Functions | 3-in-1 (mulch, side discharge, bag) | 3-in-1 |
| Motor Type | 4-stroke OHV, 170 cc | 140cc Briggs and Stratton E550 Engine |
| Height Adjustments | 6 positions (1.5" – 3.9") | 6-position, 1.5in. to 3.9 in. |
| Power Type | Gas | Gas |
| Engine Displacement | 170cc | 140cc |
| Engine Stroke | 4-Stroke | – |
| Dimensions | 56.5 × 22 × 42.5 inches | 56.5 × 22 × 40.5 inches |
| Weight | 59 pounds | 72 pounds |
| Size | 21 Inch-170cc | 22 Inch-140cc |
| Color | Black | Red |
| Model | DB8621S | HB8622S |
Frequently asked questions
Which mower is lighter to push?
The 21-inch model is significantly lighter. It weighs 59 pounds, while the 22-inch version weighs 72 pounds. The lower weight makes the 170cc model easier to maneuver, especially if you need to lift it over obstacles or store it in a tight space. The difference is 13 pounds.
Does the 22-inch model have a wider cut?
Yes, the 22-inch model has a wider cutting deck. It measures 22 inches across, compared to the 21-inch deck on the other model. This extra width allows you to cover more ground with each pass. It is better for larger, flatter areas where you want to reduce mowing time.
Are both mowers self-propelled?
Both models feature self-propelled rear-wheel drive. You do not need to push them manually. The drive system helps maintain a consistent speed, which is useful on slopes. This feature is standard on both the 170cc and 140cc versions, ensuring you get assistance on uneven terrain.
Which one is better for small lawns?
The 21-inch model is better for small lawns. Its 21-inch deck is sufficient for smaller yards. It is also lighter and more compact. The 22-inch model is designed for medium lawns needing wider cuts. If your yard is small, the narrower deck offers better maneuverability.
Do they both mulch, bag, and side discharge?
Yes, both mowers offer 3-in-1 mowing functions. You can mulch clippings, bag them, or side discharge them. This versatility allows you to choose the method that best fits your lawn care routine. Neither model restricts you to a single disposal option.
Is the 170cc engine more powerful than the 140cc?
The 170cc engine has higher displacement than the 140cc unit. Higher displacement generally provides more torque. This helps the mower cut through thick or wet grass more efficiently. The 170cc model is a 4-stroke engine with auto choke, offering reliable performance in demanding conditions.
What are the dimensions of the 21-inch mower?
The 21-inch mower measures 56.5 inches in length and 22 inches in width. It stands 42.5 inches tall. These dimensions help you determine if it fits in your garage or storage shed. The 22-inch model has the same length and width but is slightly shorter at 40.5 inches.
