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LM400 Cordless Lawn Mower



Cut more grass with fewer passes. The LM400 cordless lawn mower’s brushless motor delivers enhanced torque that allows you to cut high grass and tough vegetation on rough terrain. The LM400 cordless lawn mower’s 20" cutting diameter offers a wider cut for larger yards.


  • Brushless motor
  • Steel deck
  • 20" (51 cm) cutting width
  • 15.9 gal (1.7 bushel) debris bag
  • 58.8 lbs with one battery
  • Vertical storage position
  • Dual battery for extended run times
  • 6 cutting positions 
  • Bagging / mulching / side discharge





 Why Use Cordless Tools?

 Less Down Time

  • Fewer repairs than gas


Low Noise

  • Significantly quieter than gas
  • Silent between cuts/trimming
  • Start early and work late

Instant Start

  • No pull cords
  • No warm-up required
  • No gas-oil mixing


Zero Emissions

  • Environmentally friendly
  • No gas fumes


Comfort And Control

  • Instant start
  • Light-weight and balanced
  • Low vibrations



LM400 Cordless Lawn Mower





 Additional Features



Storage Solution

Vertical storage position to take minimal space in your garage or shed.



Dual battery

The LM400 cordless lawn mower can run on only one battery but it has the capacity for two for extended run time.


Disharge and Mulch

Side discharge option in addition to bagging and mulching. The LM400 cordless lawn mower has three methods of dealing with grass clippings: 



Simply allow yard debris to collect in the provided bag.



Use the right-side discharge to eject yard debris as you mow.



Choose the mulching option to dispose of grass and yard debris at the rear of the mower.

Grass clippings will fall back onto the ground and help reduce your yard's moisture loss.




How much work can I do?

The chart below shows the amount of square feet* you can mow using each battery on a full charge.LM400 - How much work can I do?

*Square feet shown is when using the two batteries that the LM400 holds. 



Available Options


BL300 6.0ah Battery C750 Pack


LM400-X7 + 2 x 4.0ah battery pack + C600 charger


LM400-R7 + 6.0ah Battery Pack + C750 charger


LM400-A6 + 4.0 ah battery pack + c600 charger





Complete kit
LM400-X7 Cordless Lawn Mower,
2 x 4.0 Ah Battery Pack and C750 Rapid Charger
Complete kit
LM400-R7 Cordless Lawn Mower,
6.0 Ah Battery Pack and C750 Rapid Charger
Complete kit
LM400-A6 Cordless Lawn Mower,
4.0 Ah Battery Pack and C650 Standard Charger
Tool Only
LM400 Cordless Lawn Mower 
(no battery pack or charger included)
Tool Weight 61.5 lb (27.9kg) with battery 58.8 lb (26.7kg) with battery 58.7 lb (26.6kg) with battery 56 lb (25.4kg) with battery
Cutting Diameter 20" 20" 20" 20"
Cutting Positions 6 6 6 6
Sound Power Level 95 dB(A) 95 dB(A) 95 dB(A) 95 dB(A)
Sound Pressure Level 80 dB(A) 80 dB(A) 80 dB(A) 80 dB(A)
Battery Pack Model B600E B600E B600E n/a
Battery Type Lithium Ion Lithium Ion Lithium Ion n/a
Battery Nominal Capacity 2X 4.0 Ah / 144 Wh 6.0 Ah / 216 Wh 4.0 Ah / 144 Wh n/a
Nominal Voltage 40V 40V 40V n/a
Battery Pack Weight 2.8 lb (1.25 kg) 2.7 lb (1.2 kg) 2.7 lb (1.2 kg) n/a
Charger Model C750 C750 C650 n/a
Charge Time (approx.) 60 Minutes 90 Minutes 60 Minutes n/a
Warranty** 3 years on the tools, 
2 years on batteries
3 years on the tools, 
2 years on batteries
3 years on the tools, 
2 years on batteries
3 years on the tools






A sharp mower blade cuts more grass in less time

A neat yard starts with a sharp blade, so make sure you sharpen the high-efficiency blade at the first sign of wear. Torn, gray-brown grass is one sign that your blade is getting dull with use. The LM400's 20" cutting diameter means its blade is designed to cut more grass with fewer passes. The blade can be resharpened or replaced as needed.




Warranty and Service



Consumer: 3 years on tools / 2 years on battery   |   Professional: 2 years on tools / 2 years on battery


Blount, Inc. warrants all registered Oregon Cordless Tools and Chargers for a period of three (3) years from the original date of purchase [two (2) years if used for commercial or professional purposes] and two (2) years for all battery packs. During the warranty period, Blount will replace or, at its option, repair free of charge, for the original purchaser only, any product or part manufactured which is found upon examination by Blount to be defective in material and/or workmanship. The purchaser shall be responsible for all transportation charges and any cost of removing any part submitted for replacement under this warranty.



 Additional information for Cordless Tool System Products