Question about Karcher 2500 PSI Pressure Washer

1 Answer

Karcher pressure washer

Wondering why my pressure washer holds pressure when unit is first started but when you let go of trigger and then pull trigger again it no longer has any pressure? Any ideas? B Hoffman

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 3 Answers

I had same problem won't build pressure. go to http://www.wmpcs.com/index.php?main_page=page&id=14 and see diagram. I pulled white plastic cover off top of pump (2 torx screws), remove main pump from gas motor otherwise you wont be able to get at the valve below. The important part is the valve below the the white plastic piece, it has a raised slot and mine was stuck in there. I used needle nose pinched together with pliers to lift it straight up. After wd40 and cleaning the hole and valve it should pop in and out easy. Put everything back mine worked like a charm after that. So at least I know what the problem is. Great powerwasher-I use for house painting part time and love it.

Posted on Jun 20, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My Karcher 530M runs ok until I release the trigger, then it will not start again unless I switch and allow the water to run through for about 15 secs before switching on again


Hi Cliff:
My experience is that the pump pressures prevent the engine from starting, so we hold the trigger while starting.
My brother has cut a wedge of wood that he uses to jam the trigger open to bypass the problem. It can get a bit wild if the wand is not secured when the unit is started..

Aug 10, 2016 | Karcher Pressure Washers

2 Answers

Let go of wand trigger pressure will not come back


spill valve is stuck and needs to be cleaned and greased common problem....also check all connections for blockage in line

Jul 21, 2010 | Karcher 2500 PSI Pressure Washer

1 Answer

Karcher pressure washer hunts ~ off/on ~ when running. How do I fix?


HI Your machine wil start and stop if you have any external leaks when the machine is running at not pressing the trigger. Please start the machine and not pull the trigger and look form leaks. A common one is around the high pressure hose outlet and also the trigger.

Jun 11, 2010 | Karcher 1750 psi Electric Pressure Washer

1 Answer

Karcher K2.36 motor cut out and won't restart


Yes, the water should be turned on first but if it only ran for a minute or two it should be OK. Most late model pressure washers have an automatic shutoff when the trigger on the wand is released. Turn on the water and then the machine and then squeeze the trigger on the handle of the wand and the motor should start as soon as the air is cleared from the line by the flowing water (about 10 seconds). If the unit was put away wet last season you may need to clean the nozzle with a piece of wire too.

Apr 16, 2010 | Karcher Pressure Washers

1 Answer

Have a Karacher k-3.86 ELECTRIC pressure washer


Check the reset button on the GFCI plug to be sure it's in. Once you pull the trigger keep holding it for at least 10 seconds to let the water push the air out and then it should start running.

Apr 16, 2010 | Karcher K 2.25 R Electric Pressure Washer

1 Answer

Karcher K4.97M electric waterblaster cycling


It sounds to me like the unloader valve is bypassing internally.

Nov 16, 2009 | Karcher K2.26 Electric Power Washer

1 Answer

I just bought a 2nd hand honda excell psi max vr 2522 2.2 gpm max 5.5 hp gvc160. i put gas and oil and it wouldn't start?


Have a helper hold the trigger of the wand open while you try it again. If it starts that way you have a sticky unloader valve in the pump. DO NOT RELEASE the trigger for more than 10 seconds if the engine continues to strain when released! If the engine doesnt run freely when you let go of the trigger, pull it again and shut down the unit!
Add some power steering fluid to your supply hose (about 3 or 4 ounces at a time) and restart the unit with the trigger pulled. Allow the oil to flow through the pump for 1 - 2 minutes for each treatment. Several treatments should make the pump and valve happy again.

Hope this helps.

Sep 25, 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 Pressure Washers

1 Answer

Karcher K3.91 compressor run for a few seconds every 10-15 second


They have a problem. I removed both valves and lubed with lithium grease as I was told. Unit is now working for how long who knowes.

May 18, 2009 | Karcher PSI Electric Pressure Washer

1 Answer

Karcher k4.98 switching on and off


The machine has a pressure leak. Check for a cracked controll head or either a leaking outlet elbow. The machine will short cycle if the holding pressure can not be maintained

Feb 19, 2009 | Karcher K2.26 Electric Power Washer

Not finding what you are looking for?
Karcher 2500 PSI Pressure Washer Logo

140 people viewed this question

Ask a Question

Usually answered in minutes!

Top Karcher Pressure Washers Experts

John Trevino

Level 3 Expert

1378 Answers

andy just round the...

Level 1 Expert

47 Answers

EugenesDIYDen
EugenesDIYDen

Level 3 Expert

479 Answers

Are you a Karcher Pressure Washer Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...