SENIX 21'' Gas Lawn Mower - Push, 144 cc 4-Cycle Engine, 3.4 HP, 3-in-1 (Bagging/Mulching/Side Discharge), 6-Position Cutting Height Adjustment, 1.7 Bushels Grass Bag, for 1/3 Acre Yard
Condition: New
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Availability:
In Stock.
Arrives
Monday, May 18
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Color: Blue
Features
- Effortless 1/3-Acre Maintenance The 21-inch cutting width, combined with a durable DC04-06 low-carbon & high-strength steel deck, makes this gas lawn mower a breeze to use. Effortlessly tackle 1/3-acre yards and enjoy a flawless cut every time.
- Powerful & Reliable 144cc 4-Cycle Engine Powered by a reliable 144 cc 4-stroke OHV gas engine designed for longer life, low vibration, and easy maintenance. Delivers 3.4 HP and 5.8 ft-lb of torque. Pre-filled oil allows for seconds-fast startup, with a fuel consumption of approximately 27 oz per hour (based on 1/3-acre mowing).
- Easy 3-in-1 Function Switch The versatile 3-in-1 steel deck offers mulching, side discharge, and rear bagging options to suit your mowing needs. Includes a 1.7-bushel bagger and an ergonomic handle for maximum comfort during use.
- 6-Position Height Adjustment Dual-lever height adjustment offers 6 positions ranging from 1.25 to 3.75 inches, ensuring the perfect cut every time. The unique vortex tunnel design reduces grass buildup on the deck, while 8-inch front and 11-inch rear wheels provide excellent maneuverability on rough terrain and uneven surfaces.
- What's Included 21'' push lawn mower comes complete with engine oil, mulch plug, side discharge chute, and a 1.7-bushel bagger. All SENIX gas lawn mowers are backed by a 2-year limited warranty for your peace of mind.
Brand: SENIX
Power Source: Gas Powered
Material: Alloy Steel
Color: Blue
Style: 21 Inch 3-in-1 Gas Mower
Item Weight: 54.2 Pounds
Cutting Width: 21 Inches
Operation Mode: Manual
Product Dimensions: 33"D x 23"W x 41"H
Smart Home Compatibility: Not Smart Home Compatible
Power Source: Gas Powered
Operation Mode: Manual
Smart Home Compatibility: Not Smart Home Compatible
Number of Positions: 6
Color: Blue
Style Name: 21 Inch 3-in-1 Gas Mower
Material Type: Alloy Steel
Item Weight: 54.2 Pounds
Cutting width: 21 Inches
Item Dimensions D x W x H: 33"D x 23"W x 41"H
Brand Name: SENIX
Model Number: A025054-A
Required Assembly: Yes
Manufacturer: SENIX
Manufacturer Part Number: A025054-A
Unit Count: 1.0 Count
Item Type Name: Gas lawn mower
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, May 18
This item is non-returnable:
Non-returnable. Transportation of this item is subject to hazardous materials regulation
View our full returns policy here.
Non-returnable. Transportation of this item is subject to hazardous materials regulation
View our full returns policy here.
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- Financing through Apple Pay
Learn more about financing & leasing here.
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Top Amazon Reviews
Color: Black
This mower seems well made and has a Briggs and Stratton engine on it .Assembly was quite easy and it started right up.
Reviewed in the United States on January 20, 2026 by John C
Color: Black
Purchased at the end of summer 2023 because our mower broke. This arrived in a nice colored box in a couple of days. EZ assembly. Took about 5 minutes. Comes with the engine oil needed. Simply add gas and on the 1st pull, it started right up. Very easy to adjust the wheel heights and the larger rear wheels really make this mower easy to handle and maneuver. This has multiple catch features. Either in the bag, out the side and the cross-cutting mulching works GREAT! Actually looking forward now to the spring so I can start mowing again. Such a great value too compared to some of the other bigger name brands out there. The actual engine is the EXACT same one found on many of them but this is half the price. HIGHLY RECOMMEND.
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Reviewed in the United States on January 24, 2024 by Stephanie
Color: Black
Good light duty lawn mower for the price. Came with the required oil and was simple to assemble the handle into position. They have knobs so no tools are required. Having the option of side discharge, mulch, or bag is a nice feature. Poured in the oil and some gas and fired right up and cut my yard without any problems. It has a decent quality Briggs and Stratton motor that had plenty of power to cut my St. Augustine sod lawn without struggling. The only issue I had was one of the adjustment handles for the wheels was bent in shipping or packaging and I had to remove the wheel to get the adjustment bar bent back into shape. For me this wasnβt difficult, but could be a problem for someone without the tools, etc to complete the repair. Update: After sitting for the winter a couple of months, the mower started first pull and ran fine. I use Sta-Bil fuel treatment in the gas. Without fuel treatment the ethanol will destroy the carburetor.
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Reviewed in the United States on December 6, 2025 by CFM
Color: Black
Had it for a couple of months, very happy, not hard to start, light weight, would definitely recommend
Reviewed in the United States on December 7, 2025 by Nicholas Roberts
Color: Black
Customer support is really, really bad. The frame for the grass catcher had a faulty weld and it broke on my first use. I immediately filled out the support request form on the Senix website providing all warranty information. I also emailed them pictures of the faulty weld and described the situation and provided a picture of my Amazon purchase. I purchased this mower over two months ago and after 10 attempts at getting this resolved, they are asking for all the proof/documentation again. Weeks can pass before I get a response, if I get a response at all. I'm beyond frustrated.
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Reviewed in the United States on August 6, 2025 by William Sullenger
Color: Black
Itβs a good one and cut quality is really good. Perfect gor small backyards. Speed is fine but a bit of noisy. We switched from an electric one and this one is definitely easier to use.
Reviewed in the United States on November 30, 2025 by CB13
Color: Black
Excellent machine. Perfect power for the weekend warrior keeping the yard up to par.
Reviewed in the United States on December 6, 2025 by Patrick Lapolla
Color: Black
La verdad que me sorprendio, llego super rapido, en excelente condiciones, la maquina tiene un fuerza increible, wa rapida, corta muy bien, esta NITIDA estoy muy contento con mi compra, y lo mejor de todo es su motor Briggs & Stratton es lo MAXIMO... y por ese precio, una locura......ππ½ππ½ππ½ππ½
Reviewed in the United States on November 9, 2025 by RUBINSKY ABREU