GreenWorks LMC420 - User Manual

Questions and Answers

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Brenda EverettAug 8, 2025
Why does my GreenWorks Lawn Mower stop while mowing?
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  Raymond MartinAug 8, 2025
  If your GreenWorks Lawn Mower stops during mowing, there are several potential causes. The blade height might be too low, so try increasing the blade/cutting height. Also, the battery pack could be out of power, requiring a charge. Grass clippings might be attaching to the deck or the blade, in which case you should remove the battery pack and check the deck. Finally, the operating temperature of the machine might be too high, so allow the machine to cool.
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Ashley HinesAug 13, 2025
What to do if my GreenWorks Lawn Mower does not start?
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  Grace MillsAug 13, 2025
  If your GreenWorks Lawn Mower doesn't start, the battery capacity might be low, so charge the battery pack. Another reason could be a defective handle switch, which would need replacement. Also, make sure the safety key is properly inserted.
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Frank HudsonAug 17, 2025
How to fix GreenWorks LMC420 cutting unevenly?
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  Elizabeth McmahonAug 17, 2025
  If your GreenWorks Lawn Mower cuts grass unevenly, it could be due to a rough lawn. Examine the mowing area. Also, the blade height might not be set correctly; adjust the blade/cutting height to a higher position.
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Rebecca DavisAug 21, 2025
What to do if GreenWorks Lawn Mower doesn't mulch correctly?
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  mary86Aug 21, 2025
  If your GreenWorks Lawn Mower does not mulch correctly, wet grass clippings might be attaching to the deck. Wait until the grass dries before mowing. Alternatively, the mulch plug might be missing; install the mulch plug.
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John MooreAug 26, 2025
Why is my GreenWorks LMC420 Lawn Mower so hard to push?
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  Rodney MitchellAug 27, 2025
  If your GreenWorks Lawn Mower is hard to push, it could be because the grass is too tall, or the blade height is too low. In this case, increase the blade/cutting height. It's also possible that the grass catcher and the blade are dragging in thick grass. Try emptying the grass clippings from the grass catcher.
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Melody ScottAug 30, 2025
Why is there high vibration in my GreenWorks LMC420?
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  Sarah WalkerAug 30, 2025
  If there is a high vibration in your GreenWorks Lawn Mower, the blade is likely unbalanced or worn. Replace the blade.
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Matthew DennisSep 3, 2025
What to do if the motor shaft is bent on GreenWorks Lawn Mower?
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  Morgan CoffeySep 3, 2025
  If the motor shaft of your GreenWorks Lawn Mower is bent: Stop the motor, remove the safety key and battery pack, inspect for damage, and repair the machine before you start it again.

GreenWorks LMC420 Specifications

General

Type	Cordless Lawn Mower
Motor	Brushless
Voltage	40V
Power Source	Battery
Battery Included	Yes
Battery Runtime	Up to 45 minutes
Mulching Capability	Yes
Self-propelled	No
Foldable Handle	Yes
Battery	40V 4Ah