The Husqvarna K4000 electric power cutter is a powerful saw that can stand on its own but is more likely to be used as a supplemental tool when gas is inconvenient or a safety issue. Let’s see how it performs against things that are supposed to be set in stone.

This power cutter excels because it’s quieter, lighter, and creates minimal slurry compared to a gas saw. It emits no fuel fumes making it an excellent option for indoor cutting. You need to tether it to a heavy-gauge extension cord and a 20A circuit, so it’s likely to be a supplementary tool to your Pro gas cutter.

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When you need to install a full bathroom on an existing slab, there’s nowhere for the plumbing to go but down. I have about five inches of foundation to cut into so my clients can go with the flow.

That’s where the Husqvarna K4000 comes in. Its attributes are well-suited for this indoor job. Although I wear hearing protection, a gas engine’s noise level would be really obnoxious as it bounces off the walls. But the K4000 registers 105 decibels – noticeably quieter than the K770s 115 decibels.

Running a gas engine indoors – or even in ventilated but enclosed spaces – is simply too dangerous. Carbon monoxide can accumulate much faster than many people realize. So having an emission-free saw like the one is essential to this job.

The light Husqvarna electric power cutter’s handle design makes it exceptionally maneuverable. As it sinks its teeth into unreinforced concrete, the combination of a quality blade and powerful motor make for speedy work. I didn’t cut any rebar during the review, but there’s little doubt the saw can handle it.



Although you can dry cut with a vacuum attachment, I opted for wet cuts to capture all the dust and keep the blade cooler. More on that in a moment.

Cutting capacity is excellent. The arbor’s design and motor housing’s width allow you to plunge the 14-inch a full 5 inches deep, just like the K4000’s gas-powered counterparts.

There’s a constant flow water valve with an integrated regulator that won’t allow the saw to operate unless it’s fully open. Even if the hose is on full-blast, the valve modulates the water output to keep the wet mess to a minimum.

A 3-inch wide splash guard on the bottom of blade cover does a fine job of catching most of the splash. Since the handles give you worm drive-type orientation to the saw, it does a nice job of blocking the water heading back towards you. If you don’t like the guard for some reason, a lever on its clamp allows it to slide off.

I ran the Husqvarna electric power cutter on a 15-amp circuit. The Elgard system handles the startup surge well and varies the rotation speed to protect the motor against overload. But when the saw is under load, I can trip the breaker pretty easily. Plan on running the saw on a 20-amp circuit and be sure to use a heavy-gauge (12GA or even 10GA) extension cord. Keep in mind that you might have to bring along a 20-amp generator to use the saw if you’re sharing a temporary power box.

At 16.8 pounds, the Husqvarna K4000 is a featherweight compared to the (still pretty light) 22.4-pound K770. The handle setup is reminiscent of a worm drive circular saw.

Wet cutting can be a messy business, but Husqvarna aims to keep the muddy slurry to a minimum. By allowing just enough water through the constant-flow valve, the K4000 is designed to capture dust before it becomes airborne and not leave you standing in a puddle.

In addition to the weight savings, the electric motor offers an emission-free advantage over a gas engine. That’s important for remodeling or working indoors where noxious fumes can be unsafe.

The $909 Husqvarna K4000 doesn’t have direct competition from its main rival, Stihl. Here’s what you can find in that space.

Clearly, Husqvarna is sitting at a premium price. Just keep in mind that it’s a well-designed, more refined machine than what the other guys are offering. That’s not a surprise considering the youngest of the other three is 10 years old.

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This Husqvarna electric power cutter is powerful, light, and safe to use indoors with regard to emissions and dust capture. It’s definitely a supplemental tool to your gas saw, but it’s one that remodelers and other indoor cutting Pros will want to get their hands on.

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Tom is one of the original founders of Pro Tool Reviews. Tom has nearly twenty years of experience in residential and commercial construction, having been a project manager at a engineering firm, then starting his own architectural design company, and finally owning and operating a residential construction company as a licensed contractor in South Carolina. Tom's specialties are problem-solving and attention to detail—two traits which are apparent each time he tests and reviews power tools.

This appears to be a great tool. Not surprised at the price but I am a fan of near bulletproof equipment. You know that saying: “You get what you pay for!” Certainly is the case with Husky” tools. As for the 20A circuit and “heavy duty” chord. In my humble opinion that should be the basic standard for all job sites. You can’t run two Skilsaw’s simultaneously on a 15A circuit for very long! Lol. I never use less than 12g chords. Simply not good in the long term for tool life. I see a “need” for another tool in… Read more »

I am very curious about your comment – “Recommendation This power cutter excels because it’s quieter, lighter, and creates minimal slurry compared to a gas saw. It emits no fuel fumes making it an excellent option for indoor cutting. You need to tether it to a heavy-gauge extension cord and a 20A circuit, so it’s likely to be a supplementary tool to your Pro gas cutter.” If I cut 10′ of concrete 3″ deep with a gas or electric saw i create the same amount of slurry! The concrete being cut does not know what power is being used to… Read more »

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