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


Final Score

4.3 / 5 from 221 users

SENIX LSPG-M3 | Tools Official
SENIX LSPG-M3 | Tools Official
SENIX LSPG-M3 | Tools Official

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We spent 8.2 hours reading reviews from customers and experts. In summary, here's what users think:

5 reasons to buy

  • Many reviewers highlighted the SENIX LSPG-M3 lawnmower's ability to start on the first or second pull consistently. (23 reviews)

    • “Simply add gas and on the 1st pull, it started right up.”

    • “Starts after just one pull!!”

    • “One pull start… I laughed… until I pulled the cord and it started on the first try… and has done so ever since!”

    • “This senix mower started up on the 4th pull brand new. Now it starts first or second pull every time.”

    • “started on the first pull”

    • “It starts easily”

    • “it started up easy”

    • “Primed and with one pull the engine immediately started.”

    • “THIS mower started 1st pull right out of the box”

    • “Quick, almost effortless start.”

  • Users reported that the mower cuts well, handling tall and thick grass effectively. (23 reviews)

    • “it cut it easily”

    • “and with the strong little motor even cuts high grass”

    • “Cuts through even tall 12” inch field with no problem!”

    • “Cuts REALLY well”

    • “Cut the whole yard no problem.”

    • “The cut was smooth.”

    • “I put it through hell today, yes it bogged down a bit at times but I was cutting the grass in half!! It did amazing!”

    • “It did a good job cutting my grass”

    • “it cut the grass with no issues and spread the clippings evenly enough”

    • “Cuts grass well. Cuts the heavy stuff well.”

  • The bigger back wheels and the mower's light build make it easy to push around, as many reviews have pointed out. (18 reviews)

    • “Very easy to adjust the wheel heights and the larger rear wheels really make this mower easy to handle and maneuver.”

    • “It’s light weight makes it easy to push, lift, and with the strong little motor even cuts high grass.”

    • “the larger wheels make it maneuver well”

    • “Very light and maneuverable”

    • “Handles well.”

    • “Great maneuverability and really easy to push.”

    • “it is easy to push even up a slope because of the big rear wheels”

    • “Light weight means it’s easy to push.”

    • “Very well made, and light enough, that a 120 pound woman can push it with ease!”

  • Customers frequently mentioned that the lawnmower is easy to assemble, often taking only a few minutes. (15 reviews)

  • The SENIX LSPG-M3 features a Briggs & Stratton engine, which is recognized and cited for quality by consumers. (5 reviews)

    • “This lawnmower has a quality engine from Briggs & Stratton”

    • “It has a Briggs and Stratton engine which I assume will be its saving grace.”

    • “Briggs & Stratton engine, which is the gold standard for mowers”

    • “Briggs and Stratton engines are unbeatable.”

    • “I should be getting good quality with Brigs/Stratton (sp). And so far have not been disappointed.”

2 reasons not to buy

  • Users have commented that the SENIX LSPG-M3 mower has some components that seem to be of inferior quality, with plastic elements like the wheel assemblies being highlighted as especially susceptible to damage or breakage. (11 reviews)

    • “The wheels are not straight, unusable, dangerous.”

    • “First time out the plastic holding the front part broke which dropped the wheels so it couldn't be pushed. I had to flip it only to find that the plastic holder that held the screw had broke. The screw would no longer connect so I had to go to the hardware store to find another longer screw to fix it.”

    • “The only thing I don't like is the wheels are plastic.”

    • “Cheaply made but you get what you pay for... With the cheap plastic parts and the stress on them from the metal attached, i can tell its definitely designed to break with normal use after so long.”

    • “Adjusted the height to 3 of 6 (medium) and the front wheel was no match for a buckeye nut husk, shattering the cheap plastic wheel.”

  • Some users found difficulty in opening the oil cap and suggested that a nut and bolt might be more durable for assembly than the provided screw in fastener. (3 reviews)

    • “I needed a neighbor to open the oil lid. It was on too tight.”

    • “His only complaint was opening the cap where the oil goes”

    • “The handle is put together with a single screw in fastener. This could cause a problem in the future. Would have been better with a nut and bolt.”

Bottom Line

The SENIX LSPG-M3 is a solid lawnmower that fires up quick, usually on the first try. It's a champ at cutting through the rough stuff with its tough Briggs & Stratton engine. Easy to push with its big back wheels, and you won't waste time setting it up—it's a breeze. However, watch out for some cheaper parts, and the oil cap could give you a bit of a wrestle. Overall, it's a reliable tool that gets the job done without a fuss.


Cutting Width (in)21 inch
FeaturesMulching, Side Discharge, Rear Discharge
Max Cutting Height3.75"
Min Cutting Height1.25"
Power SourceGas
CategoryPush Mowers
Warranty3 Year Limited Warranty
Weight47 lbs.

Special Features

  • 21-Inch Steel Deck: Gives you a wide path for cutting grass, so you can cover more lawn in less time.
  • Fold-Down Handle: The handle bends down to make the mower smaller for when you need to put it away, saving space in your garage or shed.
  • Briggs & Stratton 125 cc E450 Engine: A strong and reliable motor that's made to last, keeps things quiet, and is easy to take care of.
  • Low Emissions and Fuel Consumption: The engine doesn't pollute much and won't burn through gas quickly, which is better for the environment and your wallet.
  • No Oil-Gas Mix: This engine runs on just gas, so you don't have to mix in oil, making it less messy and easier to handle.
  • Prime N' Pull: A fancy way of saying it's easy to get started with just a pull or two - no fussing around.
  • Mulch or Side Discharge: You can choose to naturally fertilize your lawn by mulching the grass back into it, or just shoot the clippings out the side.
  • 6-Position Dual-Lever Height Adjustment: Lets you easily change how short you cut the grass to keep your lawn looking neat, with a simple adjustment on the wheels.
  • Durable 8-Inch Wheels: Big wheels that make pushing the mower around smoother, even on bumpy or uneven grass.
  • Includes Engine Oil: They throw in the oil you need to get started right away, so there's no extra trip to the store before the first mow.
  • 3-Year Limited Warranty: You're covered if something goes wrong for three years after you buy it, so you can feel good about this mower.


  • Q:

    Is the handle height on this product adjustable for shorter individuals?

  • A:

    The handle height is not adjustable.

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