Best Side Discharge Push Mowers for Easy Cleanup
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A side discharge push mower throws grass clippings out through a chute on the side of the deck instead of collecting them or mulching them under the deck. The best side discharge push mower for your lawn depends on the cutting width, the engine size, the height range, and whether the model also mulches or bags. This roundup compares seven walk-behind push mowers from the product pack. The listings in this set are gas powered, and each comparison below uses only the facts its listing states.
Quick answer
- Pick a 21-inch deck for a medium yard, since most listings in this set use that width. The 18-inch and 20-inch decks suit smaller areas.
- Engine sizes in the listings run from 125 cc to 144 cc. The 140 cc and 144 cc models are the larger engines in this group.
- Height ranges differ: some listings give 5 positions from 1.25 to 3.75 inches, others give 6 positions up to 3.9 inches.
- Several models combine side discharge with mulching and rear bagging, so check the included bag if you need to collect clippings.
What a side discharge deck does
A side discharge deck has an opening on one side with a chute that directs clippings away from the mower’s path. Many listings in this set describe the chute as the way to handle tall or thick grass, because the clippings do not build up under the deck the way they can in a mulching-only deck. A side chute is also what lets the mower spread clippings across a lawn rather than leaving a pile at the rear.
Several listings in this group are 2-in-1 or 3-in-1 decks. The 2-in-1 mowers offer side discharge and mulching, while the 3-in-1 mowers add rear bagging. The bagging option matters if you want to collect leaves or clippings for a garden bed. The listings give the bag size for the SENIX LSPG-M7 as 16 gallons.
Quick comparison table
| Model | Engine | Cutting width | Height range | Functions |
|---|---|---|---|---|
| PowerSmart EasyCut 18-inch (B0D69LY9F9) | 144 cc 4-cycle OHV | 18 inches | 1.5 to 3.9 inches, 5 positions | Side discharge |
| BILT HARD 21-inch 3-in-1 (B0BTPJFBPH) | 144 cc 4-stroke, 3.4 HP | 21 inches | 1.0 to 3.0 inches, 6 positions | Bagging, mulching, side discharge |
| BILT HARD 21-inch 3-in-1 (B0DCFMS5F2) | 201 cc 4-cycle OHV | 21 inches | 1.2 to 3.75 inches, 10 positions | Bagging, mulching, side discharge |
| SENIX LSPG-M4 (B0BRT8RZPR) | 125 cc Briggs and Stratton, 4-cycle | 21 inches | 1.25 to 3.75 inches, 6 positions | Mulching and side discharge |
| SENIX LSPG-M7 (B0BRTC23SM) | 140 cc Briggs and Stratton, 4-cycle | 21 inches | 1.25 to 3.75 inches, 6 positions | Bagging, mulching, side discharge; 16-gallon bag included |
| PowerSmart 21-inch (B0CYZYMTRG) | 144 cc 4-cycle OHV | 21 inches | 1.5 to 3.9 inches, 6 positions | Mulching and side discharge |
| SENIX 21-inch 2-in-1 (B0F32M5JJW) | 144 cc 4-cycle | 21 inches | 1.25 to 3.75 inches, 6 positions | Mulching and side discharge |
Cutting width: 18, 20, or 21 inches
Cutting width sets how much lawn each pass covers. The PowerSmart EasyCut 18-inch model is the narrowest in this group, with an 18-inch steel deck and 8-inch rear and 7-inch front wheels, per its listing. Its listing says the narrower deck suits maneuvering around trees, flower beds, and tight corners. Most of the other models in the set are 21 inches.
A wider deck covers more ground with each pass but is harder to steer through tight spots. For a small yard with many beds, the 18-inch deck is the better match. For an open lawn, the 21-inch decks cover more area in less time.
Engine size and starting
The listings give different engine sizes. The SENIX LSPG-M4 uses a 125 cc Briggs and Stratton 4-cycle engine, and the listing says it has a Prime n Pull start. The SENIX LSPG-M7 uses a 140 cc Briggs and Stratton 4-cycle engine, and the listing describes it as designed for longer engine life and low vibration. Several PowerSmart and SENIX models use a 144 cc 4-cycle OHV engine. The BILT HARD 201 cc listing gives 9.0 ft-lb of torque, and the BILT HARD 21-inch 3-in-1 listing gives 3.4 HP and 5.75 ft-lb of torque for its 144 cc engine.
The listings describe auto-choke and easy-start features for several models, including the PowerSmart 18-inch and 21-inch decks. The SENIX LSPG-M4 listing names a Prime n Pull start. Engine size alone does not decide how a mower starts, so read the start system in the listing before you buy.
Height adjustment
Height adjustment sets the cut. The listings in this group give several ranges. The PowerSmart 18-inch model gives 5 positions from 1.5 to 3.9 inches, which its listing describes as a dual-lever adjustment. The BILT HARD 21-inch model with 6 positions gives a range of 1.0 to 3.0 inches, which is the lowest range in the set. The BILT HARD 201 cc listing gives 10 positions from 1.2 to 3.75 inches. The SENIX models list 6 positions from 1.25 to 3.75 inches,. The PowerSmart 21-inch model lists 6 positions from 1.5 to 3.9 inches.
A lower minimum height gives a closer cut, but a low cut on uneven ground can scalp the lawn. The listings describe their ranges, and the buyer chooses the height that suits the grass.
Bagging, mulching, and side discharge
The 3-in-1 listings say they offer rear bagging, mulching, and side discharge. The BILT HARD 21-inch model and the SENIX LSPG-M7 both list those functions. The SENIX LSPG-M7 includes a 16-gallon bagger, a mulch plug, and a side discharge chute. The BILT HARD 201 cc listing describes an easy-to-empty rear bag in its 3-in-1 design. The listings for the PowerSmart 21-inch and SENIX 2-in-1 models give mulching and side discharge only, with no bagger named in the listing.
If you do not want to collect clippings, a 2-in-1 model with side discharge and mulching is enough. If you want to collect clippings for a garden bed or compost, choose a 3-in-1 model.
Wheels and maneuverability
Wheel size affects how the mower handles over uneven ground. The PowerSmart 18-inch model lists 8-inch rear and 7-inch front wheels. The BILT HARD 21-inch 3-in-1 lists 10-inch front and rear wheels. The BILT HARD 201 cc listing gives 9.5-inch rear and 8-inch front wheels with ball bearings. The SENIX LSPG-M7 lists 8-inch front and 11-inch rear wheels. The SENIX 2-in-1 listing gives 8-inch front and 11-inch rear high wheels, which its listing describes as improving passability on rugged terrain.
Larger rear wheels help on rough or sloped ground. Smaller front wheels help the mower turn in tight spots, though the listings do not state a turn radius.
Strengths and limits across the group
- Most models in this set are 21 inches, which covers a medium yard in fewer passes.
- Engines range from 125 cc to 201 cc, and the 144 cc engines are the most common size in the group.
- Several listings name a steel deck. The listings describe the deck as built for long-lasting use.
- Warranties are listed for some models: the SENIX listings name a 2-year limited warranty, and the BILT HARD 201 cc listing names a warranty.
- No listing in this set gives a price, a review count, or a star rating, and this article does not add one.
Review of the top pick: SENIX LSPG-M7 with 16-gallon bagger
The SENIX LSPG-M7 is the most complete 3-in-1 listing in this set. It is a 21-inch gas push mower with a 140 cc Briggs and Stratton 4-cycle engine. The listing describes the engine as reliable, with a design for longer engine life and low vibration. The 21-inch steel deck covers a wide path in one pass, and the listing describes it as a 3-in-1 deck that handles bagging, mulching, and side discharge.
The height range is 6 positions from 1.25 to 3.75 inches, adjusted by a dual lever. The listing gives 8-inch front and 11-inch rear wheels. The package includes engine oil, a mulch plug, a side discharge chute, and a 16-gallon bagger. The listing says the mower is backed by a 2-year limited warranty, and it describes the 3-in-1 design as suited to small to medium yards.
The strongest case for this model is a buyer who wants bagging as well as side discharge in one unit. A buyer who does not need to bag clippings may find the 2-in-1 SENIX or PowerSmart models sufficient, and they list the same height range.
The other six models at a glance
PowerSmart EasyCut 18-inch gas lawn mower (B0D69LY9F9)
This is an 18-inch steel deck with a 144 cc 4-cycle OHV engine, an auto choke for easy starts, and a primer. The listing gives a side discharge chute and a 5-position dual-lever height range from 1.5 to 3.9 inches. It lists 8-inch rear and 7-inch front wheels, and it describes the mower as easy to maneuver around trees and tight corners. The listing gives the weight as 58.4 lbs and the folded size as 26 by 19 by 14 inches. This model suits a small yard with many beds.
BILT HARD 21-inch 3-in-1 gas push mower with 144 cc engine (B0BTPJFBPH)
This 21-inch model has a steel deck and a 144 cc 4-stroke engine rated at 3.4 HP with 5.75 ft-lb of torque. Its listing describes a single-lever, synchronized height adjustment with 6 positions from 1.0 to 3.0 inches, the lowest minimum height in this group. It offers rear bagging, mulching, and side discharge. The listing gives 10-inch front and rear wheels and says the mower is easy to assemble. This model suits a buyer who wants a low cut and a 3-in-1 deck.
BILT HARD 21-inch 3-in-1 gas push mower with 201 cc engine (B0DCFMS5F2)
This model uses a 201 cc 4-cycle OHV engine that the listing says delivers 9.0 ft-lb of torque. The 21-inch steel deck offers mulching, side discharge, and rear bagging. It has a 10-position single-lever height adjustment from 1.2 to 3.75 inches, and 9.5-inch rear and 8-inch front ball-bearing wheels. The listing gives the weight as 73.8 lbs and includes a warranty statement from the maker. This model suits a buyer who wants the largest engine in the set and the widest range of cut heights.
SENIX LSPG-M4 21-inch gas push mower (B0BRT8RZPR)
The SENIX LSPG-M4 is a 21-inch gas push mower with a 125 cc Briggs and Stratton E450 4-cycle engine and a Prime n Pull start. The 2-in-1 steel deck allows mulching or side discharge. The listing gives 6 positions of height adjustment from 1.25 to 3.75 inches, adjusted with a dual lever. It includes engine oil and carries a 2-year limited warranty. This model suits a buyer who wants a 21-inch deck with a smaller engine and a standard start.
PowerSmart 21-inch gas lawn mower with 144 cc engine (B0CYZYMTRG)
This PowerSmart model has a 21-inch cutting path, a 144 cc 4-cycle OHV engine with an auto choke, and a heavy-duty all-steel deck that combines mulching and side discharge. The listing gives a 6-position single-lever height adjustment from 1.5 to 3.9 inches, and 10-inch rear and 7-inch front wheels. It describes a foldable design that saves up to 70 percent of storage space. This model suits a buyer who wants a 21-inch 2-in-1 deck and a foldable frame.
SENIX 21-inch 2-in-1 gas lawn mower with 144 cc engine (B0F32M5JJW)
This SENIX 2-in-1 has a 144 cc 4QL four-cycle engine and a 21-inch deck for mulching and side discharge. The listing gives 8-inch front and 11-inch rear high wheels, which it describes as improving passage over rugged ground and slopes. The listing gives 6 height positions from 1.25 to 3.75 inches. It says the mower is covered by a 2-year warranty and that assembly follows the manual. This model suits a buyer with a sloped or rough lawn who does not need to bag clippings.
Who should buy which side discharge mower
A buyer with a small yard and many beds should look at the PowerSmart 18-inch model for its narrow deck. A buyer who wants a wide deck and bagging should choose one of the BILT HARD 21-inch 3-in-1 models or the SENIX LSPG-M7. A buyer who wants a low cut should look at the BILT HARD 144 cc model, whose listing gives a minimum of 1.0 inch. A buyer on a sloped lawn should look at the SENIX 21-inch 2-in-1, whose listing describes high wheels. A buyer who wants the largest engine should look at the BILT HARD 201 cc model.
Mistakes to avoid
- Do not set the height too low on uneven ground, since the listings give minimum heights that can scalp the lawn on bumps.
- Do not run the mower without checking the oil. The SENIX listings include engine oil, which should be checked before the first start.
- Do not assume the bagging function is included. Only the 3-in-1 listings name a bag, and the SENIX LSPG-M7 lists a 16-gallon bagger in the box.
FAQ
What does side discharge mean on a push mower?
Side discharge sends grass clippings out through a chute on the side of the deck instead of collecting them or leaving them under the deck. The listings in this set describe it as a feature for tall or thick grass.
Which side discharge mower has the widest cut?
Most models in this set are 21 inches. The PowerSmart 18-inch model is the narrowest deck in the set.
Do these mowers come with a bag?
Only the 3-in-1 listings name a bag. The SENIX LSPG-M7 lists a 16-gallon bagger in the box. The BILT HARD 21-inch models list a rear bag as part of the 3-in-1 design.
What is the lowest cutting height in the group?
The BILT HARD 21-inch 3-in-1 model with 144 cc lists the lowest minimum at 1.0 inch. The others list 1.2 to 1.5 inches as their minimum.
Do the listings state a warranty?
The SENIX listings name a 2-year limited warranty. The BILT HARD 201 cc listing states that the maker stands behind the mower but gives the warranty length in the listing text. Check each product page before you buy.
Are these mowers electric?
No. Every listing in this set is a gas-powered push mower, and the power source is stated on each listing.
Bottom line
Choose the deck width first: 18 inches for a small yard, 21 inches for a medium yard. Then pick the engine and height range that suit your grass, and decide whether you need bagging. For a 3-in-1 mower with a bag in the box, the SENIX LSPG-M7 is the clearest match in this set.
Related reading
For guidance on clearing a stuck discharge chute, read how to clear a clogged mower discharge chute. For a comparison of Senix mowers, see Senix 20 inch 144 cc push mower review.
