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I own a Karcher 3000 pressure washer. There is no water pressure. I've checked the obvious...hose to house, kinks, attachment is tight....Enging runs, no water pressure.

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I had the same problem. On the top of the pump there is a little nickle colored button cap. It is attached on both sides with a screw. What this actually does I don't know but when I took it off with the motor running and put my finger over it the pressure come up. I also discovered that having the motor running and taking the nozzle tip off and pulling the trigger would clear the pump to work until you let of the trigger again. Weird but it works for me.

Posted on Aug 07, 2010

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Posted on Jan 02, 2017

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1 Answer

I don't get a constant stream of water from my Karcher 2500 psi pressure washer. instead is shoots in spurtss.


Make sure that while you are running your pressure washer, other machines that pull

large volumes of water like a dishwasher or washing machine are not running. check and make sure

the hose you have tied to the pressure washer is not collapsing or has any kinks in it.

check the filter where your water hose ties in to your pressure washer, make sure it

is clean and does not have any debris or hardwater buildup, clean the tip at the tip of

the wand. if it is reduced in size by hardwater buildup, will not work properly, good luck!

Jul 12, 2011 | Karcher 2500 PSI Pressure Washer

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Clear rubber hose is off machine-what does it do? I've lost the owner's manual and cannot remember how to use the electric washer. Does that short clear rubber hose with a fine filter on one end...


The clear hose with a filter on the end is a cleaning solution pick-up tube. It attaches to the washer near where the pressure hose attaches to the machine. There is ususally a barbed hose fitting for it to slip over. If you are using the black, low pressure, soap tip the hose will allow the machine to pick up cleaning solution either from a bucket or straight from the bottle, mix it in the water and spray it out on whatever you are cleaning. It will not work if you have one of the high pressure tips on the wand. They are usually red, yellow, white or green.

Jul 06, 2011 | Karcher 1550PSI Pressure Washer

1 Answer

Engine runs , not getting any water flow when trigger pressed.


Disconnect hoses.
Look for kink in water hose.
Check incoming water connection for filter washer
Replace filter washer
If you don't have a filter washer, put one in.
Hook up water, and turn on
Water should come out other side of pump.
Turn on machine.
Do you get pressured water out of pump.
If no pressure, then pump is suspect
Hook up washer hose without gun
Does pressure come out of washer hose
Finally, the gun trigger may be bad.

We had to buy guns now and then.
Search for pressure washer guns
Following link shows guns we used:
http://www.ultimatewasher.com/pressure-washer-trigger-guns.htm

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If the spill valve activates is "spills" water under the washer. There is a restriction or the pump has become inefficient and will not pump the volume and pressure it should at full RPM.

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Aug 17, 2009 | Karcher 2500 PSI Pressure Washer

1 Answer

No pressure HOSE IS BIG ENOUGH,NO KINKS, FILTER IS CLEAN. TOOK THE PUMP APART AND CHECKED ALL THE CHECKS, THEY WERE ALL OK.WHAT ELSE CAN I LOOK FOR? THE PUMP IS A KARCHER-MODEL G 1800 LB Thanks, Art


Brother Art,

Try this trick; it always works for me. Assemble the garden hose to the washer, install the HP hose, turn on the water. Now, make sure that there is no air trapped in the garden hose. Manipulate so as to direct any air trapped in the line to the washer. Connect the gun and continue to allow water to "free flow" for several minutes. Now, work the trigger, allowing the unit to rise to "house pressure, and then pull the trigger, dropping the pressure suddenly. This displaces any air hidden in the system. Do this several times, and start the washer up. If this doesn't get you up to pressure, repeat the above on an abbreviated scale, and hold the trigger on the gun down while you start the washer. This should do it.
Regards, --W/D--

Aug 08, 2009 | Karcher Garden

2 Answers

I started working with the Karcher KB4040 pressure washer and all was well for 1-2mins, then it sputered a bit and all power died. All hoses were still attached properly, it hadn't blown a fuse in my house...


if the water is in anyway impeded, like kink in hose the unit turns off and goes into protection mode. That it it shuts down for a pewriod of time depending on how hot it may have got.
When its rested try it again ensuring you definitely have water flow.If the solenoid has failed it costs about !60-200 to fix as they replace all seals regardless

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