Question about Coleman Pressure Washer PW0881800

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When the spry trigger is pressed the engine boggs down and stops. Is there a relief valve stuck maybe.

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This issue is caused by defective unloader or debris trapped in spray nozzle or faulty gun. Easy to check. Check system with-out spray nozzle. The engine should not labor at all when you depress trigger without nozzle. If it labors/ dies faulty gun, if no labor, install new or clean nozzle (check for correct gpm for machine) and retest. If ok, you are done, if engine labors or dies, reduce pressure by turning pressure knob as required. If reducing pressure has no effect, most likely faulty unloader. Good luck

Posted on Oct 06, 2010

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Posted on Jan 02, 2017

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I think you mean an UN Loader this is a valve that redirects (bypasses) the pressureized water back into the intake when you release the trigger When it is not working the machine continues to build pressure and will bog down

hope this helps

the ed

Oct 08, 2015 | Northstar Garden

2 Answers

Loss of pressure


You will probably find the loss of pressure is bad pump seals maybe even worn pump pistons. The problem is that it cost as much to repair these pump as it does to replace them with a new warrantied unit most times. Larger commerical pumps are still fairly reasonable to repair but the replacement costs are coming down too.

Jan 15, 2015 | Garden

1 Answer

Why is water continuously coming out of the thermal relief even when the water is cold?


if your pressure is satisfactory then you will need to replace the thermal relief you can plug the port as long as the pump is unloading fine when trigger is released an get a replacement asap thermal relief valve will open when the gun is released for a long duration of time over three minutes.detergent valve inside the barb you may have to assist the ball bearing inside it might be stuck to the o-ring and the siphon it produces is not sufficient enough to cause separation.you can insert a nail small enough and slowly insert it inside the port til you feel it separate.

Aug 18, 2014 | Garden

1 Answer

I get hose pressure from my Brute 2600 psi, 6.75hp power washer when the engine is not running, but when I start the engine, I get no additional motor pressure.


The pressure you have when the motor is not running is supply pressure through the unit. When you start the motor it will build up pressure then shut the pump action down until you pull the trigger of the gun. When you release the trigger the pressure drops to zero . This happens through a relief valve that the pressure hose is connected to. If what I stated is not happening then there is a problem with insufficient water supply to the machine or a problem in the relief valve.

Sep 28, 2013 | Yamaha Kawasaki Genuine Kvf750 Brute Force...

1 Answer

Portercable Pressure Washer Model PCH2401


when the trigger for the wand is not pulled , there is a pressure relief valve that bypasses the water in the pump and so there is no pressure until the trigger is pulled again.
with the pump getting hot and not being able to pull the motor to restart, it indicates that that pressure relief valve has jammed ( faulty ) and the pump is running at full pressure all the time
That will heat the pump and stop the engine from restarting
That valve is where I would start looking for a problem

Apr 25, 2017 | Porter Cable Garden

2 Answers

ENGINE RUNS FINE WHILE HOLDING THE WAND TRIGGER BUT , WHEN I RELEASE THE TRIGGER THE ENGINE STALLS OUT


you have a faulty presure relief valve. it is building up presure and killing the engine.

Jun 16, 2011 | Devilbliss DeVILBISS Devap DVH2600...

2 Answers

The pump has pressure applied, but no spry comes out.


These sprayers get rust in spray handle, they taking apart and lubing sprayer. If you leave chemicals in tank you will ruin the spray handle.

Jun 20, 2009 | H.D. Hudson 1 Gal Poly Deck Sprayer

1 Answer

Trigger not working correctly


You might need to de-scale the unit to free the stuck valve.
Keep the unit unplugged.
Fill the unit with a vingar and water (filtered or distilled is best).
Screw the cap back on and place the unit in a sink upside down to allow the vingar and water to reach the valve.
After a few minutes press down the trigger several time to work the solution into the valve.
Hope this helps.

Sep 15, 2008 | Euro-Pro Shark SC-505 Handheld Steam...

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