Senix LSPG-M4 Review

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

4.2 / 5 from 247 users

Senix LSPG-M4 | Tools Official
Senix LSPG-M4 | Tools Official
Senix LSPG-M4 | Tools Official

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We spent 8 hours reading reviews from customers and experts. In summary, here's what users think:

5 reasons to buy

  • Numerous customers have highlighted that the Senix LSPG-M4 mower starts on the first or second pull consistently, indicating a reliable ignition system. (26 reviews)

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

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

    • “Starts after just one pull!!”

    • “Starts easy.”

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

    • “starts on one or two pulls”

    • “started on the first pull”

    • “It starts easily”

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

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

  • Several reviews say that the mower's larger back wheels and lightweight build make it easier to handle and move around. (20 reviews)

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

    • “much easy to maneuver than my previous one.”

    • “the larger wheels make it maneuver well!”

    • “Very light and maneuverable”

    • “It’s light weight makes it easy to push, lift”

    • “Great maneuverability and really easy to push.”

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

    • “Powerful enough to mulch through thick grass and moderate yard debris but without the added weight.”

    • “the big back wheels make a huge difference”

  • Most users reported the mower being very easy to assemble, typically taking about 5 minutes with minimal effort. (14 reviews)

  • Though the engine is described as small, its power is praised for handling tall grass and providing a quality cut, comparable to more expensive models. (12 reviews)

    • “The actual engine is the EXACT same one found on many of them but this is half the price.”

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

    • “though small with 125CC’s, it is very STRONG and capable”

    • “Cuts the heavy stuff well.”

    • “Powerful enough to mulch through thick grass and moderate yard debris.”

    • “Very powerful, deliver a excellent performance - fast and preciseness.”

    • “mows thru heavy brush”

    • “the performance is amazing”

  • The Senix LSPG-M4 mower offers various options for grass clippings, including bagging, side discharge, and mulching, catering to different lawn maintenance preferences. (5 reviews)

2 reasons not to buy

  • One customer was disappointed to find out the Senix LSPG-M4 mower was not returnable after experiencing engine failure. (9 reviews)

    • “this item is not returnable”

    • “we cant return the item for a refund so we are stuck with this”

    • “I reached out to the company for a refund as there's no way I'm going to waste time trying to fix something brand new.”

    • “refund was refused”

    • “Thats Briggs and stratton apparently, and their dealers wont deal with you, nor will Senix.”

    • “This is unacceptable on both Senix and Amazon to stick me with the bill because of a mistake on their end.”

    • “not to mention that to return it I had to pay over $100 to get my refund”

    • “I have not received any compensation”

    • “Welcome to my newest thing I have to figure out how to throw out because I submitted return and now out of return window”

  • Criticism was directed towards the cheap plastic parts that are prone to breaking easily, according to a customer's experience. (8 reviews)

    • “The plastic pieces are cheap and break easily.”

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

    • “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.”

    • “the wheels are so cheap the front wheel broke with less than 5 hours use and regular use mowing.”

    • “noticed the sheen is about to brake. It’s bent and seems it’s not going to last long.”

    • “shattering the cheap plastic wheel”

    • “lawnmower is cheap and no one should buy it”

Bottom Line

Get your lawn in shape with the Senix LSPG-M4! This mower fires up quick, usually on the first pull. Its big back wheels and light design make it easy to push around. Set up's a breeze, taking just 5 minutes. Don't let the compact engine fool you - it cuts through tall grass like a pro. Choose how you handle your clippings: bag 'em, chuck 'em, or mulch. But be aware, some parts might feel a bit flimsy, and if it quits, you're stuck with it - no returns.


Cutting Width (in)21 inch
FeaturesMulching, Side Discharge
Max Cutting Height3.75"
Min Cutting Height1.25"
Power SourceGas
CategoryPush Mowers
Warranty3 Year Limited Warranty
Weight49 lbs.

Special Features

  • 21-Inch Steel Deck: Gives you a big space to cut more grass in one go, making your job quicker and easier.
  • Fold-Down Handle: The handle collapses so it fits into tight spots in your shed or garage, saving you space.
  • Briggs & Stratton 125 cc 4-cycle E450 Engine: This engine is strong but runs clean and quiet. It's good for the planet because it uses less gas and doesn't need you to mix in oil like some other engines.
  • Prime 'N Pull Start System: Starting the mower is a breeze – just prime it, pull it, and you're set to go, even when it's cold.
  • 2-in-1 Mulching and Side Discharge: You can chop the grass into fine bits to feed your lawn or shoot it out the side to clear it away – your choice.
  • 6-Position Height Adjustment: You can change the cut height with a simple lever to make sure your lawn looks exactly how you want it, from really short to a bit longer.
  • Big Wheels (11-inch rear, 8-inch front): The larger wheels make it easier to push the mower around, especially if your yard is a bit bumpy or uneven.
  • Comes with Engine Oil: They throw in the oil you need for the engine, so you can get started right away without an extra trip to the store.
  • 2-Year Limited Warranty: If something goes wrong with the mower in the first two years, you're covered with a warranty.
  • Ergonomic Handle: The handle is made to be comfortable to hold, which is nice when you've got a lot of grass to cut and don't want your hands to get tired.


  • Q:

    Is the handle of the product adjustable in height?

  • A:

    The handle is not height-adjustable.

  • Q:

    Is it possible to add a bag for clippings to the 2-in-1 lawnmower at a later time?

  • A:

    The model is not equipped with a rear discharge feature to accommodate a bag; it is designed exclusively for mulching and side discharge.

  • Q:

    What assembly is required for this product?

  • A:

    Assembly involves attaching the handle, which is a straightforward process.

  • Q:

    Does the lawnmower have a foldable handle?

  • A:

    Yes, the handle is designed to fold up for convenience.

  • Q:

    Does this lawnmower operate on pure gasoline without the need for oil mixing?

  • A:

    Correct, it operates on straight gasoline without the need for an oil mix.

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