Question about Karcher G3025OH Pressure Washer

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Pressure washer does not spray consistent flow of pressure

My gas powered pressure washer runs fine. When I compress the trigger, the flow of water will keep pressure for 5-8 seconds and then immediately lose pressure. This cylce repeats itself as long as the trigger is compressed.

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Pressure washers have a pressure regulator/unloader that bypasses the water back into the intake when you let go of the trigger with motor running. If you let the machine run for long preiods in bypass the system could be damaged due to heating of the water being bypassed. The water is in a closed loop. The as the unloader wears it will tend to want to bypass which is what is happening in your case. Dirt trapped at the tip will cause this also. Install clean tip to solve problem. If clean tip did not help then try lowering the pressure by turning pressure regulator counterclock wise. If problem is gone then parts are failing but keep using pump. Good luck.

Posted on Jul 11, 2010

  • jonlanghans Jul 13, 2010

    Easy enough, I took the screen off at the water intake, cleaned it and it resolved the problem. Thanks for the fix.

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What and where is the uploader in a pressure washer. I think mine is clogged. it starts fine and water comes out, but looses pressure

Posted on Mar 19, 2011

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Posted on Jan 02, 2017

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1 Answer

Xtreme pressure washer keeps cutting out.


If it is a gas powered machine and it cuts out when you release the spray gun trigger, it means that your unloader valve is stuck closed.
It would help to have more information about your machine and your problem. Gas or electric? Does it start up and run fine or cut out a few seconds after starting? Does it cut out when you release the trigger?
Does it cut out while spraying?

May 07, 2014 | Garden

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Preasure fluxuates while washing


Sounds like nozzle is too small or faulty unloader valve

Nov 15, 2012 | Simpson PS2600 PowerShot Commercial-Duty...

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I have a honda 2600 pressure washer. After running fine for a couple of seconds the water will stop flowing out the tip. It is receiving water,but will not flow it to the pressure hose. I even disconnected...


This happens when air gets inside the hose. An air bubble of sorts is in the hose and will not build pressure until you blow the air out of the line. Start the pressure washer, turn on the water. pull the trigger on the gun. It will spitter and spatter and come to a trickle. release the trigger on the wand. Pull the trigger again and it will eventually work it self out.

Jun 13, 2011 | Honda Black Max 2600 PSI 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

Oct 25, 2010 | Karcher G2650HHR Gas Pressure Washer

1 Answer

What would cause a pressure washer to cut off after you pull the handle to get the water started


We used power washers for years

When you pull the trigger, the engine is supposed to accelerate because the back-pressure on the pump is released.

The back-pressure is why you're supposed to keep the gun trigger open when starting the engine. It sounds like you're starting the engine with no water passing through the gun.

Inspect the exhaust port >> if exhaust is clogged with carbon or dirt, then the engine will not run at high speed.

The problem may also be cause by a rusted choke lever. If you notice when a small engine accelerates, the choke lever moves up as the carburetor demands more gas.

Start the engine with water passing through the gun >>> move the choke lever a little bit at a time and see what happens. Keep water going out of the gun. When the surfaces are cool, spray WD-40 on the lever and see if you can free it up. WD-40 is extremely flammable.

If your engine will not fire at all by starting with water passing through the gun, then your gas supply might be limited or your carburetor gummed up. Pull off the rubber gas line that connects to the carburetor and see if gas flows.

Next, pull off the air filter and see if the machine runs good without air filter. You may have clogged air filter.

While the carburetor is exposed, spray WD-40 into carburetor. See if you can get engine up to full throttle while spraying WD-40 into carburetor. Keep spraying the WD-40. Keep the water flowing out of the gun.

If the engine throttles up all the way on WD-40 but won't run without it, then your carburetor is probably gummed up.

Our old power washer won't run with the choke set at full throttle. We just got into the habit of leaving the choke alone. We'd pull off the air filter and spray WD-40 into the carburetor so the engine would spark healthy without messing with the choke at all. And we kept the choke about 2/3 open all the time.

Oct 15, 2010 | Garden

2 Answers

Starts but won't stay running, i clean carburator and still have same problem, unit has been used very little, still look new, Thanks,


Have you checked your oil? You need pump oil half way up in reservoir. Open plug on top of pump and check oil. Pump takes SAE 20 or 30

Next, open oil plug below engine and check your oil level. It should come up 1/2 way on dip stick. Engine takes 10W30. Don't turn washer on its side or upside down to drain oil or oil will run into carburetor.

Is the water turned on? Are you holding gun trigger open while starting? Pump needs water flow. DO NOT tie gun trigger open with wire and then start engine. That gun will flip around and shoot a hole in your leg.

If the engine starts, then you have gas, spark and compression

If engine won't stay running, the exhaust port might be clogged, or the carburetor is not letting in enough gas, or gas is not flowing to carburetor.

Check the screen over exhaust port > is it dirty or clogged? Clean with WD-40 or break it out with a screwdriver.
Remove gas filter below gas tank >>> it has a hex bolt >> loosen bolt >> the gas should come flowing out >> put it back if gas comes out
Next remove rubber gas line feeding gas to carburetor >> gas should flow out this line too >> if flows then put it back.

What about your air filter? Take it off. See if engine fires and runs without air filter. Air filter may be clogged.

While air filter is out, you can see open port to carburetor. Spray some WD-40 into carburetor. Fire up the engine. It should spark real healthy on the WD-40. Keep spraying WD-40 into carburetor to see if you can keep engine going. Don't forget to keep gun trigger open so water is flowing and pressure is not building in pump.

If engine keeps going with WD-40 but dies without it, then your carburetor is very suspect. You might need a new one.

If engine will not keep going with WD-40, then the spark is very suspect.

Change spark plug. Try again. If it doesn't fire up after that, you need to take it to the shop for repair.

Oct 09, 2010 | Honda 2500 PSI Gas Pressure Washer

3 Answers

Does not give a continous high pressure flow cuts in and out


that is sure signal of insufficient water supply!

try easy solution first:
make sure that your mains is fully open, that tap on whihc hose is hook up is fully open and hose is of "decent" diameter to allow sufficient flow.

if above solution do not work then you need to make another, more difficult arrangement:
prepare 20litres pressure tank with inlet connected to mains and outlet by short hose to power washer, fill it with water from mains, keep it under mains pressure and use karcher power washer normaly. this will solve water supply problem. twenty litres will last about 2min, because it is re-filled, under standard pressure therefore it will last about 3min...

third possibility is to stop washing...

if you find my advice helpfull, please do not hesitate to left the comment and vote for me, thanx!

Jul 31, 2010 | Karcher K2.26 Electric Power Washer

1 Answer

My pressure washer won't build up any pressure. it will run water when you pull the trigger, but it is the same pressure as if the unit if not running


I'll assume you have an electric rather than a gas powered unit. First check the button on the plug to be sure the GFCI hasn't popped and be sure the outlet has power. With the water faucet turned fully on and the power switch on squeeze and hold the trigger for at least 10 seconds to let the water flow push the air out and then it should start up.

Apr 15, 2010 | Garden

1 Answer

Vacuum lock when releasing trigger. water will


It sounds like the valve in your trigger gun is sticking. Depending
on the model it can be rebuilt or repaired

Sep 08, 2009 | Karcher Garden

1 Answer

Pressure washer with no pressure


Are you priming the water lines before you switch on the power?
i.e. with power OFF, hook up hose and turn hose on (doesn't need to have much hose pressure), then take your spray gun or attachment and pull the trigger and allow water to flow through the system (at hose pressure obviously). You might need to gravity feed it if its not flowing through...

But you will generally only get pressure once all the air is removed from the lines and the pump is pushing water only... Once you have water flow and lines are primed, switch on pump and see if that solves it.

Mar 17, 2009 | Briggs & Stratton Pressure Washer...

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