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Customer reviews for SENIX 21" 140cc 4-Cycle Briggs & Stratton Engine Gas Push Lawn Mower with 3-in-1 Mulching, Bagging, Side Discharge for
SENIX 21" 140cc 4-Cycle Briggs & Stratton Engine Gas Push Lawn Mower with 3-in-1 Mulching, Bagging, Side Discharge
3.8 out of 5 stars
stars33 ratings33 reviews
  1. 5 stars58% (19)
  2. 4 stars9% (3)
  3. 3 stars9% (3)
  4. 2 stars0% (0)
  5. 1 star24% (8)
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Showing 1-10 of 33 reviews
Nov 6, 2025
Victoria
5 out of 5 stars review

Verified Purchase

i am over 60 with many health issues,one being copd, and this mower allows me to mow my uneven, slightly inclined area with ease. the bonus is i dont get short of breath. the downside is that the bag only allows me to make one pass b4 i have to dump it, and it isn't very easy to remove and reattach quickly. overall, i love it.

Review from walmart.com
Helpful?6M6X07THNVRB18850422510
Jul 24, 2025
Merrell
5 out of 5 stars review

Verified Purchase

EXCELLENT MOTOR, EXCELLENT WELL, comes with oil

The engine is a Briggs and Stratton 500 series 140cc power, 4 stroke motor. The oil comes with it but, to the bottom fill line, not the top. The instructions are, do not use economy gas. I always use premium and my lawnmowers last 6-8 years with NO repairs. Change the oil yearly, without fail, and in this case, use 4-stroke oil, which is a little thicker. Came out of the box intuitively and took me 5 minutes to get it up and running, including gas and oil. Intelligently boxed to save me stupid extra steps, which I hate. The blade is unlocked and ready to cut. It is a sharp blade but, these need sharpening or replacing every two years. It´s cheap, quick and will save your back from a dull blade having to go over and over a section.

Review from walmart.com
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Aug 13, 2025
00Kimber
5 out of 5 stars review

Verified Purchase

Love the M7 model

I already have one of these Senix mowers and purchased this one just in case the one I'm using ever quits. Love the M7 model. I have never had an issue with it and it always starts with the first pull. It replaced my Craftsman. I primed it when I first got it and now I don't even have to do that. Love it...

Review from walmart.com
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Aug 15, 2025
BARBARA
5 out of 5 stars review

Verified Purchase

mower was easy to remove from box ,tighten handle ,add oil took less than 20- 30 mins mowed with and with out bag and did great...

Review from walmart.com
Helpful?6M6X07THNVRB18850422510
Jul 26, 2023
Beckygirl318
5 out of 5 stars review

Verified Purchase

Does what it is suppose to!

very good mower so far. i usually ise self propelled but finances didnt allow this time. I'm very impressed with how easy this mower is to use. i can actually mow more yard with less effort then using the last couple of mowers i owned. The mower is light weight so its important to not push down while you push otherwise the mower lifts up but if just pushed regulary, i really couldnt ask for a better mower. The price on sale was much better than mowers of the same 140cc, 21 " cut and metal pan! just hope this kower last longer then the last two.

Review from walmart.com
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Apr 26, 2024
Sherry
5 out of 5 stars review

Verified Purchase

Can't wait to cut my grass

[This review was collected as part of a promotion.] So far, I love the mower. I haven't used it yet. First time buying this brand. Looking forward to cutting my grass. Assembled it will no problems. Nice grass catcher. Not too heavy. Feels good in my hands. My other mower is old so thought I better buy a spare. So, I'm ready. Grow grass grow !

Review from walmart.com
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Apr 16, 2026
walter
4 out of 5 stars review

Verified Purchase

First time using it

The first time I used it start right up on it, but I was cutting high grass. It died and then it wouldn't restart and used ether two or three times and it started up. Ran it till I got finished. Try to restart it wouldn't do it so I left it alone next day I finish cutting the grass and it worked fine. It worked beautiful. It started up on the second pool and I don't know it was just a glitch with a brand new unit or something. I don't know, but it works fine now but when you're doing a mulching, you gotta have the blades up very high otherwise it cuts beautiful.

Review from walmart.com
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Dec 3, 2025
Mark
4 out of 5 stars review

Verified Purchase

I definitelly liked the mowers overall physical structure but once I was completed with assembly and was going to fill the oil and fuel to test it I oticed a rack on one of the plastic covers on the top of the deck... returned it for a refund.

Review from walmart.com
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Jun 4, 2025
Tonia
1 out of 5 stars review

Verified Purchase

Very cheaply made. Back tires are loose but nuts are tight so I am thinking they are stripped and the wheels will soon need to be replaced. Bag is on the small side compared to one the same size as another lawnmower totally disappointed with this lawnmower and it wasn’t the cheapest either.

Review from walmart.com
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Aug 26, 2023
Kevin
1 out of 5 stars review

Verified Purchase

REPLACEMENT BLADES NOT AVAILABLE

Mower runs fine. Not sure why this motor needs a push bulb when older version of same Briggs Stratton didn't. You can see where old B%26S logo has been ground down and painted over on the motor. Par for the course these days. ***BUT THE WORST AND MOST IMPORTANT PART*** Hit a rock, blade bent (won't even get into how cheap the stock blade is) to the point can't turn motor. Go online to look for blade. No replacement blades available. It is a completely different blade mount pattern and as of this writing impossible to buy anywhere. Senix is out of stock and no other location NOT EVEN WALMART sells them. I have to go buy an MTD adapter and MTD blade just to be able to use this mower. 1000% unacceptable. Stupid even.

Review from walmart.com
Helpful?6M6X07THNVRB18850422510
reply from Senix Tools

Hi Kevin, we aim to provide high quality tools for all of our customers. We are disheartened to hear you are not completely satisfied with us. You can find the blade on our webiste: https://senixtools.com/collections/mower-blades/products/21-inch-replacement-mower-blade-for-senix-lspg-m7-gas-powered-lawn-mower. If you need any other part for the blade, please feel free to reach us at 1 800-261-3981 M-F 8-5 Eastern. Thanks.