144cc SENIX 4-Cycle Engine
Smooth, reliable performance with no fuel mixing required, ensuring consistent results season after season.





The SENIX LSPG-L4 is a 20-inch push gas lawn mower powered by a 144cc 4-cycle engine. It is designed for reliable, straightforward mowing on small to medium-sized lawns, with no need to mix fuel and oil.
144cc 4-cycle gas engine: Delivers dependable power and smooth operation without fuel mixing.
20-inch cutting deck: Covers more grass in each pass to help reduce mowing time.
3-position height adjustment: Lets you adapt the cutting height for different grass conditions.
Side-discharge system: Ejects clippings efficiently to help reduce deck buildup.
Durable 14-gauge steel deck: Built for long-term outdoor use and consistent cutting performance.
Foldable handle: Makes the mower easier to store in a garage or shed.
Get the job done right with the SENIX 20-Inch Gas Push Lawn Mower—your go-to choice for power, performance, and durability. Powered by a robust 144cc 4-cycle SENIX engine, this mower delivers consistent start-up and long-lasting power without the hassle of mixing fuel and oil. Its 20-inch true cutting width helps you cover more ground quickly, while the 3-position height adjustment lets you adapt to different lawn conditions with ease. Designed for convenience, this side-discharge mower also comes equipped with a durable steel blade with true 20-inch cutting width. The durable 14-gauge steel deck stands up to tough use, and the foldable handle makes storage a breeze. Outfitted with PVC composite-blend wheels, the mower provides added traction for smooth maneuverability across varied terrain.
Smooth, reliable performance with no fuel mixing required, ensuring consistent results season after season.
Covers more ground in fewer passes, ideal for small to medium-sized lawns, and delivers a clean, professional-grade cut.
The side-discharge design makes cleaning convenient and quick.
Absolutely! It is designed for a 10-minute hassle-free setup. You don't need any complicated professional tools. The package comes with almost everything pre-assembled. Just follow these 4 quick steps:
1. Unpack & Fold Up: Unpack the mower on a flat surface. Raise and secure the lower and upper handles using the quick-tightening handle knobs (no tools required!).
2. Pop the Wheels On: Align the wheels with your desired cutting height holes (choose from 1.35" to 3.15"). Screw each wheel with the provided axle pins and nuts. (Make sure all 4 wheels are at the same height).
3. Attach Safety Covers: Mount the rear trailing shield into the slots and bolt on the side discharge cover using a simple 10 mm wrench.
4. Position the Pull Cord: Hold the safety bail handle down and slip the starter recoil rope into the rope guide on the handle.
That’s it! You are ready to add oil and gas!
Per U.S. shipping and safety regulations, the unit is shipped without gasoline or oil in the engine. However, we include a bottle of high-quality engine oil right in the box for you! Before your first start, simply pour the provided oil bottle into the oil tank , fill the gas tank with fresh, unleaded regular gasoline, and you are good to go!
This gas push mower features a powerful 144cc 4-cycle engine and a 20-inch heavy-duty steel deck, making it perfect for small to medium-sized American lawns.
* Slope Capability: It can safely handle slopes up to 15 degrees. For your safety, always mow across the face of slopes, never up and down.
Not at all. The engine is equipped with a manual primer bulb. Simply push the primer bulb 3 times to pump fuel into the carburetor before a cold start , hold the safety bail handle against the upper bar , and pull the recoil rope. It typically fires up on the first 1-2 pulls!
To keep your SENIX running like a beast year after year, just follow these quick tips:
*Check Oil Level: Check the engine oil level before each use.
* Keep it Clean: After mowing, clean off grass clippings from the underside of the deck (do not use a pressure washer).
* Off-Season Storage (Winter): If you are storing the mower for more than 30 days during the winter, make sure to drain the fuel tank or run the engine until it stops to prevent gas from clogging the carburetor. Adding a fuel stabilizer is also highly recommended.
Its 20-inch cutting deck is well suited to small and medium-sized residential lawns.
No. The LSPG-L4 is a push lawn mower, giving the operator direct control while mowing.
| Power | Gas |
| Engine Brand | SENIX |
| Engine Type | 144cc 4-Cycle (RV145-S) |
| Drive Type | Push |
| Mowing Functions | Side Discharge |
| Cutting Width | True 20" Blade Length |
| No-Load Speed | 3,100 RPM |
| Cutting Height | 1.35" - 3.15" |
| Height Positions | 3 |
| Wheel Size | 7" Front & Rear Wheels |
| Deck Material | Steel |
| Product Dimensions | 26" X 22.2" X 13.6" |
| Weight | 39.3 lbs |
| Certification | SGS |
3 Year Limited
If you have a question about your product, reach out to our SENIX support team. We will follow up with you via your preferred contact method within 24-48 hours.
Hours: Mon - Fri, 9am - 5pm EST
Email: senix.support@yatusa.com
*Expect a response within 24-48 hours
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