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SENIX

SENIX LSSG-M9 21-inch Gas Self-Propelled Lawn Mower - 140 cc 4-Cycle Briggs & Stratton Engine, Bagging, Mulching, and Side Discharge, 6-Position Lever Height Adjustment

  • Based on 67 reviews
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Availability: In Stock.
Fulfilled by Hearthshire
Arrives Friday, Jul 17
Order within 18 hours and 29 minutes
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Cutting width: 21.0


Set name: 140CC Gas Lawn Mower w/B&S Engine


Features

  • Easy Yard Maintenance21-inch Cutting width gas lawn mower, effortlessly tackling small to medium yards.
  • Powerful EngineGas lawn mower is powered by a reliable Briggs & Stratton 140 cc gas powered engine that is designed to provide longer engine life, low vibration, and easy maintenance; Prime N' Pull start makes it easy to start the mower every time
  • 3-In-1 Lawn Mower 3-in-1 steel deck with mulching, side discharge, and rear bagging provides versatile mowing options; 16-gallon bagger is included; Ergonomic handle maximizes user comfort during use
  • Cutting Height AdjustmentThe 6-position dual-lever height adjustment from 1.25-inch to 3.75-inch ensures you get the perfect cut every time; 8" front and 11" rear wheels provide great maneuverability through rough terrain and uneven surfaces
  • What's in the Box Self-propelled single speed lawn mower (front wheel drive) includes engine oil, mulch plug, side discharge chute, and 16-gallon bagger. All SENIX gas lawn mowers are backed by our 2-year limited warranty for your peace of mind

Description

Self-propelled single speed，Front wheel drive makes getting the job done easier 3-IN-1 versatility for lawn cutting flexibility. Equipped with steel deck for durability. 6-position manual height adjustment tailors grass cutting height from 1.25 inches to 3.75 inches. Less mowing time

Brand: SENIX


Power Source: Gasoline-Powered


Material: Alloy Steel


Color: Blue


Style: 3-in-1 Self-propelled


Item Weight: 55 Pounds


Cutting Width: 21.0


Operation Mode: Automatic


Product Dimensions: 33"D x 23"W x 16"H


Number of Items: 1


Brand Name: SENIX


Model Number: LSSG-M9


Required Assembly: Yes


UPC: 843212102762


Manufacturer: SENIX TOOLS


Manufacturer Part Number: LSSG-M9


Unit Count: 1.0 Count


Item Type Name: walk-behind-lawn-mowers


Material Type: Alloy Steel


Item Weight: 55 Pounds


Cutting width: 21.0


Item Dimensions D x W x H: 33"D x 23"W x 16"H


Wheel Size: 8 Inches


Power Source: Gasoline-Powered


Operation Mode: Automatic


Smart Home Compatibility: Not Smart Home Compatible


Maximum Adjustable Cutting Height: 3.75 Inches


Minimum Adjustable Cutting Height: 1.25 Inches


Number of Positions: 6


Color: Blue


Style Name: 3-in-1 Self-propelled


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Jul 17

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
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  • Affirm Financing
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  • 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!
Cutting width: 21.0 Set name: 140CC Gas Lawn Mower w/B&S Engine
Works great! Self propelled can hold one handed and walk along very easy! Only downside is maybe the assembly but not very complicated or difficult.
Reviewed in the United States on May 4, 2026 by Aaron
    • Easy starting
Cutting width: 21.0 Set name: 140CC Gas Lawn Mower w/B&S Engine
Easy starting. I travel for work so my wife mows the lawn. This is the 2nd mower in less than a month. I forget what brand the other mower was. My wife could not start the other one. This on starts right up for her and moves itself right along.
Reviewed in the United States on September 19, 2025 by noel mcconchie
    • Outstanding Customer Service
Cutting width: 21.0 Set name: 140CC Gas Lawn Mower w/B&S Engine
The first mower didn't work. However, the customer service was outstanding. They sent us a replacement and it works wonderfully. It is easy to operate and so far we are very pleased.
Reviewed in the United States on November 15, 2025 by Sheila R.
    • Worthless!
Cutting width: 21.0 Set name: 140CC Gas Lawn Mower w/B&S Engine
Worked three times on a small yard. Would not start afterwards no matter what I did based on the instructions. Bought it based on the reputation of the company making the motor. What a mistake! Don’t be fooled by the cheap price.
Reviewed in the United States on March 14, 2026 by PER2012
    • Senix Lawn mower
Cutting width: 21.0 Set name: 140CC Gas Lawn Mower w/B&S Engine
It’s easy to use and start the lawn mower. The height is adjustable. It’s durable like other brands. However, it is not as powerful like other brands I use. It has a grass bag and collect most of my grass and saves a lot of my time blowing. The self propelled part is a little slow and I have to do a lot of pushing to speed up. My house is 1/4 of acre and maybe too much for this lawn mower. Overall pretty good for small land and price I bought before was good deal on thanksgiving sale. ... show more
Reviewed in the United States on June 12, 2026 by Ms. Sunshine
    • Great mower if purchesed on sale.
Cutting width: 21.0 Set name: 140CC Gas Lawn Mower w/B&S Engine
Great mower for the price I paid for this (200 less than current). 4 stars for Briggs & Stratton engine. I would stay away from china engines. 4 stars for power. 3 stars for bagging, grass. 2.5 stars for leaves- too much is not bagged and just blown around. 3.5 stars for mulching but doesn't do well in tall grass.. 4 stars for ease of starting. 3.5 for self propel. I definitely would by again for the price I paid but I would not buy at current price, I would go to Walmart or HomeDepot. ... show more
Reviewed in the United States on March 29, 2026 by Greg Tex
    • Tough luck
Cutting width: 21.0 Set name: 140CC Gas Lawn Mower w/B&S Engine
The box the mower came in was mangled and wrapped in plastic tape. I had been tracking it's delivery. I saw it come to Lubbock It was a day early. I was alerted by UPS it was here early. I was excited. But then it went to Illinois. I watched it on the tracking window. They took 2 more days to get back to Lubbock. And I could see the torn up, boxed mower. Oh the mower was tough. It was wrapped plastic tape..The mower was ok, but the small parts were GONE! UPS' fault. A tribute to the SENIX Mower Though!🙂 And powerful. DLB of Lubbock Texas ... show more
Reviewed in the United States on September 2, 2025 by David Billingsley
    • No power on FWD
Cutting width: 21.0 Set name: 140CC Gas Lawn Mower w/B&S Engine
Should be FWD. hardly moves, pushing it even on level surfaces. Horrible. Should’ve just gotten the deWalt
Reviewed in the United States on April 14, 2026 by Michelle

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