SENIX 20" Gas Lawn Mower, 144 cc Gas Powered Lawnmower, 4-Cycle Engine Walk-Behind Push Lawn Mowers, 3 Cutting Height, Lightweight,for Garden Yard
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Availability:
19 left in stock
Arrives
Aug 1 – Aug 3
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Size: 20 Inch-144cc-3 Position
Features
- Powerful 144CC 4QL EnginePowered by a dependable 144CC 4QL gas engine, this mower delivers steady power to cut through thick grass and gentle slopes. It starts easily and runs smoothlyso you can focus on mowing, not struggling with the machine
- 20-inch Cutting WidthWith a generous 20-inch cutting width, this mower covers more ground in a single pass, significantly improving operational efficiency compared to standard 16-inch models
- 7"/7" Wheel DesignEquipped with front and rear 7-inch wheels, this mower glides effortlessly over uneven ground, bumpy patches, and sloped areas. The wheels reduce resistance and make pushing feel light and naturalhelping reduce strain on your arms and back
- 3 Adjustable Cutting HeightsOffering three versatile cutting height settingsfrom 1.35 inches to 2.3 inches to 3.15 inchthis mower adapts to different grass conditions
- Quick Installation & WarrantyDesigned for quick and hassle-free setup, this gas lawn mower comes with clear instructions for simple installation. Plus, enjoy peace of mind with a 2-year warranty that ensures long-term reliability and customer satisfaction
Description
Backed by 20+ years of manufacturing and innovation in the tool industry, at SENIX, we aim to break barriers and shatter expectations by redefining and manufacturing outdoor power equipment and power tools with edgy innovation and relentless passion. Whether you're an arborist, a landscaper, or a fearless DIY enthusiast, SENIX tools have been crafted with you in mind. We empower you to conquer any task at hand. Visit the Store Visit the Store Visit the Store Visit the Store
Brand: SENIX
Power Source: Gas Powered
Material: Stainless Steel
Color: Blue
Style: 20"-144 cc-4 Cycle Engine
Item Weight: 39.3 Pounds
Cutting Width: 20 Inches
Operation Mode: Manual
Product Dimensions: 25.6"D x 21.8"W x 13"H
Number of Items: 1
Brand Name: SENIX
Model Number: LSPG-L4-001A-002
Required Assembly: Yes
Manufacturer Warranty Description: 2 Year Manufacture
Manufacturer: SENIX
Manufacturer Part Number: gas lawn mower
Unit Count: 1.0 Count
Item Type Name: 20" Gas Lawn Mower
Material Type: Stainless Steel
Item Weight: 39.3 Pounds
Cutting width: 20 Inches
Item Dimensions D x W x H: 25.6"D x 21.8"W x 13"H
Power Source: Gas Powered
Operation Mode: Manual
Smart Home Compatibility: Not Smart Home Compatible
Maximum Adjustable Cutting Height: 3.15 Inches
Minimum Adjustable Cutting Height: 1.35 Inches
Number of Positions: 3
Color: Blue
Style Name: 20"-144 cc-4 Cycle Engine
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Aug 1 – Aug 3
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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Top Amazon Reviews
Size: 21 Inch-170cc-6 Position
Great mower. I'm getting a little older so I needed to replace my existing push power mower with a self-propelled model. Assembly was very simple as it just needed the handle to be unfolded and secured. Added oil and gas, primed it three times per instructions and pulled the starter cord three times. After that, one pull is all it took. It started right up and I put it to work in a yard that needed mowing a week ago. It was so easy and quick that I was a little disappointed that it was done. I'm actually looking forward to mowing again next week.
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Reviewed in the United States on July 2, 2026 by Amazon Customer
Size: 22 Inch-201cc-6 Position
Works great. No problem cutting my lot and a half of grass. The RPM may need to be set down a bit. The gas tank seems to be larger than my previous self-propelled mower and I go through fuel faster. But hardly any clippings stick under the deck after finishing mowing. The mower starts well first thing but cutting the engine while mowing to move a downspout makes the engine hard to start again. The handle that raises and lowers the deck is for all wheels at once on the right instead of on every wheel. That makes it easier to mow along a chain-link fence on the left because there are no handles to get caught in the fence on the left. I use the mulching mode so far. I am on the 4th time cutting my lawn with this mower as I write this.
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Reviewed in the United States on June 5, 2026 by P. K.
Size: 20 Inch-144cc-5 Position
The only good things I can say about this mower is that it comes almost completely assembled with the motor oil included. And it’s a pretty blue. Other than that it’s a piece of junk. I had difficulty starting mine right off the bat. It took multiple pulls on the power chord which required a lot of strength because the chord seemed to keep getting stuck. Every time I had to stop the mower then start it again I went through the same misery…15-20 pulls before it would start. In addition, I set the cutting height to my customary next-to -the-lowest setting and it immediately began to vacuum up the soil on my lawn and blow it out the side discharge with alarming velocity. I’m talking about huge clouds of soil that blew out and covered everything in the vicinity—including me. My lawn was not dry either—it had rained the day before. I NEVER had a lawn mower do that before. It almost seems like the engine has too much power for what it’s made to do. I managed to get my back yard and side yard mowed but then while I was mowing my front yard, I began to hear what sounded like something made of metal knocking around inside the mower. The next thing I knew I heard a loud “Pop!”, The mower shut off and I’ve been unable to start it since. I think it’s dead. I’m so bitter and angry about this because it’s too late to send it back and I still have more payments I have to make on it.
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Reviewed in the United States on May 28, 2026 by Vickie
Size: 20 Inch-144cc-5 Position
Showed up quickly and I was cutting the lawn with it 15 minutes after opening the box. Someone who didn't read the instructions could have done it in 5 minutes. It cut smooth and even, managed about 1/2 an acre on one tank of gas, and was able to cut an over grown backyard with grass as high as 18 inches. I cut a solid acre in an afternoon, only limited by my own stamina. My riding mower is on the fritz and I needed something cheap to fill the gap. I ordered on Monday, had by Wednesday, unboxed and mowed on Saturday. If you wanted a bottom of the line side discharge, this is a good one. No complaints. I think it will serve me for years as small space and back up, or even the acre.
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Reviewed in the United States on May 4, 2026 by EL Montague
Size: 20 Inch-144cc-3 Position
Easy to assemble very reliable starts every time can take a lot of abuse Too bad I cannot find any lawnmower engines available. You have to buy the whole lawnmower, even though there’s nothing wrong with the chassis I have large property and sometimes I will hit a rock or something, and if the blade hit it real hard, it screws up something with the driveshaft in the engine. I usually have to buy a new lawnmower every two years because of that.
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Reviewed in the United States on June 17, 2026 by DCM.
Size: 21 Inch-170cc-6 Position
packaging is excellent mower was almost completely put together which was great & very easy to finish. pushes & runs great very easy to operate really glad I purchased this machine, and like the idea of providing the oil
Reviewed in the United States on July 3, 2026 by Wylie
Size: 21 Inch-170cc-6 Position
So far, the mower has been very good and performs as expected. In my opinion, the product itself is good. The only negative point is the user manual. The letters are extremely small and there is too much information packed together, making it difficult to find the important maintenance instructions. Most of the useful maintenance information I actually found on the internet instead of in the manual. For the initial start-up, I added oil to the crankcase and fuel to the tank. The manual recommends pressing the primer bulb 3 times, but after trying many times without success, I found a YouTube video where someone recommended pressing it 15 times. After about 12 additional presses, the mower finally started. I also performed the first oil change after the initial 5 hours of use, as recommended. The oil came out very dark, which confirmed to me that the early oil change was important. So far, my opinion is positive about the mower itself. The weak point is definitely the user manual, not the product.
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Reviewed in the United States on May 9, 2026 by Rodrigo Lacerda Delgado
Size: 20 Inch-144cc-5 Position
The mower was delivered missing one of the handle bolts. I called Amazon support, and they were very helpful. They gave me a partial refund and a contact number to call and an email address to Senix support. Senix support was terrible. They did not answer any of my calls or emails until 10 days later. Then they said they required all kinds of documentation, pictures and a lot of red tape, when all I wanted was for them to send a handle bolt. In the mean time I bought a handle bolt and it works fine. The lawnmower itself seems to be fine, although it start a lot harder than what had been described, maybe after 8-10 pulls. The last time a mowed it was only 3 pulls, so maybe it is getting better.
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Reviewed in the United States on May 15, 2026 by John Boy