SENIX 21-in Gas Push lawn mower with 140-cc Briggs and Stratton Engine

Name: SENIX 21-in Gas Push lawn mower with 140-cc Briggs and Stratton Engine
Brand: SENIX
SKU: 5014901697
Rating: 4.4 (64 reviews)

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4.4

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Simple. Tough. Gets the job done. Take control of your yard with the SENIX 21-inch Push Lawn Mower, powered by a 140cc Briggs & Stratton 4-stroke engine that delivers clean, consistent performance without the gas-oil headache. This walk-behind gas mower is built for efficiency. Featuring a rugged 21-inch steel deck and 3-in-1 cutting system that lets you mulch, rear bag, or side discharge on your terms. Prime N’ Pull start gets you going with minimal effort, and the 6-position dual-lever height adjustment (1.25" to 3.75") means you can dial in the perfect cut for any season. Oversized 11-inch rear wheels tackle bumps and uneven ground without a fight, and the fold-down handle makes storage quick and compact when you're done. This mower doesn’t overpromise, it overdelivers. The SENIX LSPG-M7 gas mower is a dependable backyard companion that keeps your lawn in shape and your weekend headache-free.

Cutting Capacity: 21-Inch cutting width provides a large cutting area with high durability
Powerful Engine: Briggs and Stratton 140 cc 4-cycle E550 engine with Prime n Pull start delivers reliable power to quickly tackle your job
Mowing Capability: 3-in-1 steel deck with mulching, side discharge and rear bagging
Height Adjustment: 6-position dual-lever height adjustment from 1.25-inch to 3.75-inch
Maneuverability: Durable 8-inch front and 11-inch rear wheels provide great maneuverability through tough terrain and uneven surfaces
Added Comfort: Ergonomic handle maximizes user comfort during use
Storage: Fold down handle for easy storage
Includes: Engine oil, mulch plug, side discharge chute and 16 gallon bagger
Warranty: 2-year limited warranty for peace of mindranty for peace of mind

General
Type	Push lawn mower	Deck Material	Steel
Power Source	Gas	Adjustment Type	Dual-lever
Start Type	Pull start	Blade Speed (RPM)	3200

Dimensions
Cut Height Adjustment	6-position	Mower Deck Width (Inches)	21
Cut Width (Inches)	21	Package Weight (lbs.)	62
Front Wheel Size	8-in	Rear Wheel Size	11-in
Maximum Cutting Height (Inches)	3.75	Weight (lbs.)	54
Minimum Cutting Height (Inches)	1.25

Features
Bagger Capable	Yes (included)	Engine Torque (Ft/Lbs)	5.75
Blade Stop System	Yes	Foldable Handle	Yes
Collapsible	Yes	Lowe's Exclusive	No
Discharge Location	Side	Mulching Capable	Yes (included)
Engine Brand	Briggs & Stratton	Self-Propelled	No
Engine Displacement (Cu. Centimeters)	140	Speed Control	Manual
Engine Oil Included	Yes	Bagger Included	Yes
Engine Series	550e

Warranty
Warranty	2-year

Certifications
CA Residents: Prop 65 Warning(s)	No	Safety Listing	SGS safety listing

Compatibility
Recommended Yard Size	1/2 to 1 acre	Replacement Blade OEM Part Number	A025034-029-00
Recommended Terrain Type	Uneven

Miscellaneous
UNSPSC	27112000

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Review

4.4 out of 5

64 Reviews

86% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

The Senix 21-inch gas-powered push lawn mower is generally well-received by customers. It is praised for its lightweight and easy-to-use design, smooth and powerful engine, effective mulching and bagging capabilities, and adjustable deck height. Many customers report the mower handles thick grass well and provides good value. However, some have experienced issues such as wobbly wheels, starting difficulties, and parts falling off over time. The fuel tank is also smaller than expected for some users.

Customer review summary generated by AI, including incentivized reviews.

64 Customer Reviews

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Works good, bag fills fast

Would Recommend

It does what it's supposed to. Easy start

KindaguyMarch 24, 2026
Verified Purchaser

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Perfect

Would Recommend

Working great. Easy to put together.

March 13, 2026
Verified Purchaser

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received used mower

Would Not Recommend

Received used mower with oil already in it and grass all over wheels. Lowes wouldn't assist in delivering new mower and picking used one up from my residence. Filter was soaked with oil.

SLJMarch 2, 2026

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Great lawnmower 21'' 140cc Briggs and Stratton

Great lawnmower for the price. Cuts even and easy to claen.

Manuel AndaverdeJanuary 23, 2026

From YAT USA, Inc

California lawnmower

Would Recommend

I received my Senix lawnmower quickly, the manual instructions were in easy-to-understand sentences, and the Briggs & Stratton engine works like a dream, as I expected. The lawnmower was also much more reasonably priced than the ones available out here in California. Thank you folks & merry Christmas!

Chris PriceDecember 21, 2025

From YAT USA, Inc

https://photos-us.bazaarvoice.com/photo/2/cGhvdG86c2VuaXh0b29scw/cbbe751a-9f1a-58b5-85c3-9e7064539aad

https://photos-us.bazaarvoice.com/photo/2/cGhvdG86c2VuaXh0b29scw/a4f99c5b-1eac-5506-bd86-76dbf9f51bcc

Works Great

Would Recommend

Mowed 1/3 Acre of unmowed Florida lawn/jungle LOL mulched like a dream .

GeezerDecember 17, 2025

From YAT USA, Inc

Good for the Price

Would Recommend

The mower was fairly easy to get into service. It cuts well. Leaves tend to gather between the front right wheel and the frame. Mower can be difficult to start. I often have to pull the starting rope 4 or more times.

FredNovember 21, 2025
Verified Purchaser

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		Name	Current Item SENIX21-in Gas Push lawn mower with 140-cc Briggs and Stratton Engine
		Ratings	64
		Type	Push lawn mower
		Cut Width (Inches)	21
		Engine Brand	Briggs & Stratton
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