Kobalt KBB 4240-06 Spec Review

The Kobalt KBB 4240-06 is a cordless backpack leaf blower delivering 690 CFM at 135 MPH. It features a 4 Ah 40 V Li-ion battery. (Read full specs)

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Kobalt KBB 4240-06 690 CFM Cordless BlowerKobalt KBB 4240-06 690 CFM Cordless BlowerKobalt KBB 4240-06 690 CFM Cordless BlowerKobalt KBB 4240-06 690 CFM Cordless Blower
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Features and Specifications

Type Cordless
Handling Backpack
CFM Up to 690
MPH Up to 135
Blowing Force N/A
Voltage40 V
Speed settings Variable
Battery Li-ion
Autonomy 200 mins
Throttle positionTube
Cruise controlYes
Vacuum No
Battery included 2
Weight (w/ battery)22 lbs
Weight (tool only)16.4 lbs
Noise rating 76 dB
Warranty 5 years

Unlike many websites, we did our best to research each of the specs above. That being said, we are not immune to making the occasional mistake or omission. Should you notice any missing or incorrect values, don't hesitate to suggest improvements so we can address the issue. Should you wish more detailed specs on the Kobalt KBB 4240-06, the user manual is available here (opens in a new tab).

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Overview of the Kobalt KBB 4240-06

  • Power: The KBB 4240-06 is a cordless blower made by Kobalt. It has a maximum air speed of 135 MPH and its nozzle can expel a max air volume of 690 cubic feet per minute (CFM).
  • Power delivery: The KBB 4240-06 is a brushless-motor, battery-operated blower. Therefore, it doesn’t require to be plugged in when it’s being used. The user will enjoy the added mobility of its cordless design.
  • Battery: With its 4 Ah 40 V Li-ion battery (2 batteries included), the Kobalt KBB 4240-06 has a standard, full-charge run time of up to 200 minutes.
  • Handling: By design, this model isn’t the smallest leaf blower on the market. It’s meant to be carried as a backpack so that the bulk of the unit is out of the way and the user’s hands are free to manipulate the nozzle. Its throttle is located on the tube, which allows you to keep your left hand free. All told (including the battery), it weighs 22 lbs — the Kobalt KBB 4240-06 is neither the lightest nor the heaviest electric backpack blower on the market.
  • Speed Settings: To provide more control over their job to the user, the unit has a variable speed control setting. No matter the size of the job, the user can adjust the airflow of the Kobalt KBB 4240-06 to match it. On top of that, maintaining the selected speed is effortless, as it also features cruise control.
  • Noise: Its noise rating of 76 dB can be considered the standard for similar electric backpack blowers.

Product Videos

The Kobalt KBB 4240-06's performance versus other blowers

The following charts are provided to give you an idea how the key specs of the Kobalt KBB 4240-06 compare with similar leaf blowers.

  • Maxing out at 135 MPH at full power, this blower is on the lower end in terms of air speed for battery-operated backpack blowers. For the fastest air speed in this category, you may want to consider the EGO LBPX8000, which can expell air at a velocity that can reach 190 MPH.
  • The KBB 4240-06 is powerful, with an airflow rating of 690 CFM (cubic feet per minute). This is certainly on the high end compared to other cordless backpack blowers. If air volume is important to you, the EGO LBPX8000, with 800 CFM, could be in your good books.
  • Thanks to its autonomy of up to 200 mins, the KBB 4240-06 benefits from a higher run time than many cordless backpack units. If autonomy is an important factor for you, the Makita CBU02Z can run for up to 240 minutes and could be worth considering.

Price comparison

As you can see from this interactive chart, when compared to other cordless backpack blowers, the Kobalt KBB 4240-06 is on the cheap side of the price range.

It can therefore be a really good buy if you're looking to acquire a budget blower.

The bottom line

  • Inexpensive
  • Brushless motor
  • Cruise control
  • 5 year (limited) warranty
  • High CFM (690 CFM)
  • Excellent autonomy (200 mins)
  • Decent weight (22 lbs)
  • Acceptable noise (76 dB)
  • Low MPH (135 MPH)

Do you own the Kobalt KBB 4240-06 and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

About Kobalt

Kobalt is an American brand launched in 1998. Kobalt is the product of a partnership between Lowe’s, a leading seller of home improvement and outdoor products, and J.H. Williams, which is one of Lowe’s primary manufacturers. As one of Lowe’s primary outdoor equipment brands, Kobalt has positioned itself to be a major competitor of Craftsman, Husky, and other similar popular brands.

Warranty Information

The Kobalt KBB 4240-06 is covered under a warranty for up to 5 years. This warranty may not cover all parts of the blower.
For more information about the warranty of Kobalt blowers, please consult Kobalt's warranty policies (opens in a new tab). Alternatively, you can also contact their Customer Support: 1-888-3-KOBALT (888-356-2258).

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