Karcher K4 Stress Washer Overview overview

Fox Morgan examined the Karcher K4 stress washer to scrub up a grimy boat backside and a load of different filthy issues. Does this reside as much as the hype? Spoiler alert, is blooming good.

Karcher K4 Energy Management Stress Washer

This Karcher K4 Stress washer is a grimy/clear little pleasure.
Do you know that scrubbing the underside of boats is a type of remedy to me? I don’t learn about you, however I like stress washing stuff. It may be some soiled fencing, grubby flag stones, or a weedy or barnacle potted boat backside.

Let’s have at it with a stress washer. Seeing the grime blast away is extremely satisfying. This Karcher K4 stress washer comes with a number of stress ranges of satisfaction.

As a result of as you may need gathered I wish to stress wash every thing I conceive as being stress washable. Horse rugs? Sure. Outdated heavy obligation tarps? Sure. My boat decks? Sure. Manky cockpit teak? Sure I do know I’m an absolute barbarian.  And on it goes.

Stress washers are notoriously susceptible to getting used on issues they actually shouldn’t. That prime stress would possibly satisfactorily blast away inexperienced grime, but it surely may additionally blast away any structural integrity of the canvas or fibres of the material/wooden you’re cleansing.  That is the place you want a stress washer the place you need to use a decrease stress setting…

Step up then, the Karcher K4 stress washer.

Stress (bar/MPa) 20 – max. 130 / 2 – max. 13
Movement Charge max. 420 l/h
Energy score 1.8Kw
Energy Cable 5m
Excessive-pressure gun: G 160 Q Energy Management Gun
Vario Energy spray lance
Filth Blaster spray lance
Excessive-pressure hose: 8 m
Detergent utility by way of: Plug and Clear system
Telescopic deal with
Water-cooled motor
Built-in water filter
Adapter backyard hose A3/4″
Weight with out equipment – 11.5kg
Dimensions (L × W × H) 402mm x 306mm x 588mm

This Karcher K4 stress washer has three, sure three ranges of stress adjustment for a variety of things. So quite than simply holding the wand a bit additional away and hoping for the most effective, with this one, you’ll be able to actually get in there precisely and never blast the factor you’re cleansing to smithereens.

There’s a number of actually properly designed components to this one. I like the extending deal with which permits it to be simply wheeled about, but it surely tucks away again in my van or automobile boot simply with the deal with stowed.

The lance and wand storage is strong and permits the instruments and attachments to be neatly saved onboard the unit. I particularly just like the little bit of netting over the again (see photos in gallery) which is a extremely useful place to stash bits.

The excessive stress hose attachment is a sturdy steel fast launch click on in beneath the hose stowage hanger and the low stress water inlet is the usual screw match attachment for a clicklock hose becoming or different becoming of your alternative. it comes with the hoselock becoming as customary however the thread is appropriate with extra heavy obligation steel fasteners.

After I first unpacked this stress washer, I struggled to get the excessive stress oscillating nozzle to  perform. I needed to disassemble it and examine. I discovered a tiny burr of plastic that was stopping the cone from spinning internally. As soon as eliminated and the nozzle reassembled, it was blasting the barnacles off in seconds.

An elective further that didn’t include mine is the cleaning soap bottle. I’ve a cleaning soap bottle on one in every of my different stress washers and they’re surprisingly very helpful, particularly on a decrease energy setting for cleansing canvas canopies and different exterior materials, similar to a dodgers and winter covers.

Together with the scrubbing brush, used on the bottom stress setting this Karcher K4 is just about the multitool of cleansing.

That is by far the most effective stress washer I personal, or have ever owned because it occurs and I’ve had fairly a number of over time.

I like mine. I find it irresistible much more as a result of my dad purchased it for me. It’s the reward that retains on giving.

If you wish to examine extra stress washers that we now have examined, then take a look at our different article: Finest stress washers for boats




  • adjustable energy, good construct high quality, comes with good vary of instruments as customary


  • bigger and heavier than a decrease priced/decrease specified stress washer, premium price ticket

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