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SENIX

SENIX LSPG-M4 21-Inch Gas Push Lawn Mower with 125 cc 4-Cycle Briggs & Stratton Engine, Mulching and Side Discharge, 6-Position Dual Lever Height Adjustment

  • Based on 589 reviews
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Availability: In Stock.
Fulfilled by MID ATLANTIC MERCHANTS
Arrives Thursday, May 14
Order within 6 hours and 11 minutes
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Size: 21-Inch 125cc Gas Mower


Features

  • EFFICIENT LAWN MOWING: The SENIX 21-inch gas push mower features a steel deck with a 21-inch cutting width, providing a large cutting area with high durability for small to medium size yards; The fold-down handle allows for easy storage and space-saving
  • EASY-TO-START QUIET ENGINE: Briggs & Stratton 125 cc 4-cycle E450 engine with Prime n Pull start delivers the power to tackle your job; The 4-stroke engine is eco-friendly with low emissions, low fuel consumption, no mixing of oil and gas, and low noise
  • VERSATILE CUTTING CAPABILITY: The 2-in-1 durable steel deck allows you to mulch or side discharge; The ergonomic handle maximizes user comfort during use
  • HEIGHT ADJUSTMENT AND MANEUVERABILITY: 6-position dual-lever height adjustment lets you adjust from 1.25-inches to 3.75-inches to meet the needs of your lawn; Durable 11-inch rear wheels & 8-inch front wheels are designed for easy maneuvering
  • WHAT'S INCLUDED: The SENIX push lawn mower comes with engine oil for your convenience; Is it backed by our 2-year limited warranty, so you can purchase with confidence

Brand: SENIX


Power Source: Gas Powered


Material: Alloy Steel


Color: Blue


Style: 125cc


Item Weight: 57 Pounds


Cutting Width: 21 Inches


Operation Mode: Manual


Product Dimensions: 32.8"D x 22.72"W x 14.88"H


Assembly Required: No


Brand Name: SENIX


Model Number: LSPG-M4


UPC: 843212113195


Manufacturer: SENIX


Item Type Name: Gas Push Lawn Mower with 125 cc 4-Cycle Briggs & Stratton Engine, Mulching and Side Discharge, 6-Position Dual Lever Height Adjustment


Unit Count: 1.0 Count


Manufacturer Warranty Description: 3-year limited warranty


Material Type: Alloy Steel


Power Source: Gas Powered


Number of Positions: 6


Operation Mode: Manual


Maximum Adjustable Cutting Height: 3.75 Inches


Minimum Adjustable Cutting Height: 1.25 Inches


Item Weight: 57 Pounds


Cutting width: 21 Inches


Item Dimensions D x W x H: 32.8"D x 22.72"W x 14.88"H


Color: Blue


Style Name: 125cc


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, May 14

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Great mower
Size: 21-Inch 125cc Gas Mower
Great mower! Perfect mower to do the job.
Reviewed in the United States on March 22, 2026 by MiMi06
    • Well made and light weight while nicely powered and sized for the price.
Size: 21 Inch-144cc Gas Mower
Super Easy Set Up with no tools required. Seems to be well made while being lighter than older mowers. It is easily manuverable with the nice wheels sizes especially the larger set on the back that make turns and uneven lawns less work to navigate. Includes the required engine old for use. It's winter here where I live currently so I could not mow with it yet but did run it and it started easily. Just add the oil that's included and your gasoline and 3 pulls later mine roar d to lift. Priced retail at $299 its already a great size deck and higher engine output option compared to others in the same dollar bracket. At the time of my purchase it was on sale for $197 which made it a very impressive multching or side discharge mower compared to any other options similarly priced. If you are looking for the best gas powered mulching mower for around $200 dollars save yourself the search time and shopping and take one of these home. I feel it's a fantastic machine for the money. ... show more
Reviewed in the United States on January 4, 2026 by jwright
    • Awesome quality
Size: 21-Inch 125cc Gas Mower
Amazing price. Outstanding performance
Reviewed in the United States on February 12, 2026 by JLeffler
    • Cuts well, easy to assemble, but possible* motor issue
Size: 21-Inch 125cc Gas Mower
Review Image by Chris Alicea
Review Image by Chris Alicea
Review Image by Chris Alicea
I received the lawnmower today, and I was immediately impressed with how easy it was to get started. The packaging was simple to open, and setup was a breeze—just tighten a few screws, add oil and gas, and you’re good to go. Assembly-wise, I’d give it five stars. The engine runs well for a 125cc motor. It’s not a high-end mower, but for the price, it cuts efficiently and gets the job done. However, I did experience one issue on first use: about 30 minutes into mowing, the engine started producing a bluish-white smoke, which is usually a sign of too much oil. I followed the manual closely upon startup and double-checked the oil level twice before restarting. It smoked again briefly, so I let it cool for an hour. After that, it ran clean, and I was able to finish my yard without any further issues. I’m hoping this was just a break-in quirk and not a recurring problem. Other than that, I’m satisfied with the mower’s performance. If the motor holds up like my last Briggs & Stratton, which lasted five years, I’ll consider it a great purchase. ... show more
Reviewed in the United States on July 17, 2025 by Chris Alicea
    • Arrived incorrectly built
Size: 21 Inch-144cc Gas Mower
It arrived incorrectly put together from the factory. The height adjustment lever was placed wrong and it won't allow the mower to move because it hits the back wheel. I saw multiple other reviews saying the same thing so please don't buy this!! Can't use it and no returns or refunds, going to have to try and fix it ourselves. 0 Stars ... show more
Reviewed in the United States on April 2, 2026 by dave badger
    • Great Product
Size: 21 Inch-144cc Gas Mower
Awesome!
Reviewed in the United States on March 15, 2026 by Robert M
    • Decent and Okay!
Size: 21-Inch 125cc Gas Mower
Review Image by SSA
It gets the job done, but the engine struggles a bit if the grass is slightly thick. Setup was easy, but the mower itself feels lighter and flimsier than I expected.
Reviewed in the United States on December 11, 2025 by SSA
    • A good purchase
Size: 21 Inch-144cc Gas Mower
I'm very happy with this purchase. Easy to assemble and lawnmower started right up. One just has to know how lawnmowers work re oil and gas use.
Reviewed in the United States on March 20, 2026 by Susan Wetzel

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