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I have a Honda GC160 5 horsepower power washer with 2400 psi. When its cold it is easy to start but after it has been running for a while the only way to start it is to have the water shooting out of the wand. Once it is hot and running if i stop the stream of water (release the trigger on the wand) then the machine shuts off. It seems like the only way to keep it running is to constantly have water running through the wand. Please help

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  • Garden Master
  • 5,312 Answers

You are not choking it for warm restart are you?? maybe you have a carb clog issue?? try running seafoam in your gas for a tank or two...just 2 ounces at a time is good. dont overdo it!!

Posted on Jun 29, 2017

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Posted on Jan 02, 2017

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  • 3 Answers

SOURCE: Karcher 2400 psi blaster When you

To determine if your problem is due to an easily replaceable part, follow these steps:

1. Connect the water supply hose, the pressure hose, and the wand WITHOUT any nozzle tip.

2. Turn on the water supply, and press the trigger until water is smoothly running out of the nozzle
after any air is all purged out. Release the nozzle trigger.

3. Start the engine, and let it warm up for about 30 seconds.

4. With the engine running smoothly, press the nozzle trigger. The water should flow out of the nozzle (without the tip installed) at a faster rate, while the engine noticeably loads down as it used to do before your "no pressure" problem. If it does not load down, turn it OFF, and disconnect everything, and contact a Karcher repair facility.

5. If the engine does load down, release the trigger, and install one of the nozzle tips (not the black one).

6. Press the trigger, and the engine should load down, and you should have normal pressure from the wand. After you release the trigger and press it again, you will probably again have no pressure, and the engine will not load down. Removing the nozzle tip, pressing & releasing the trigger, and re-installing the tip should give you normal pressure again, but releasing the trigger will cause no pressure until you again remove the tip, press the trigger, and re-install the tip.

This is caused by a bad UNLOADER VALVE, which is located under a black cap with a metal button on it located on the top front of the pump. I don't know if you can purchase the replaceable parts from a Karcher repair shop, but when a neighbor & I took his washer to a repair place, it looked pretty simple to do this repair, and he was charged about $60 to replace a $5 (maybe) part, and it took about 5 minutes.

Posted on Sep 17, 2008

  • 10 Answers

SOURCE: pressure washer stalls out when wand nozzle is released

common for not starting unless trigger engaged as you are turning the pump as well as engine creating pressure,as for stalling pump has unloader valve which is probably in need of grease(use good silicone grease)this allows water to ciculate when trigger released.

Posted on Apr 20, 2009

  • 8 Answers

SOURCE: 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

Posted on Jul 25, 2010

  • 92 Answers

SOURCE: Motor does not shut off when trigger on wand is released

When the trigger is released, pressure builds up and this acts on a valve (spill valve or pressure control valve). When this pressure is big enough it will push the spill valve out and closes a micro switch. Now this Spill Valve gets stuck sometimes, mainly due to soap and chemicals...so the micro switch is not closed...so the machine contiues running. If this is left likee this it will cause damage to the valves. So all one has to do is service the spill valve or as I usually do I replace it. There are cases were the micro switch is damaged also..and needs to be replaced. To see the spill valve and micro switch you must open the cover. The spill valve is located where you see a cover with an electric wire coming out of it. If the micro switch is good...you must tackle the Spill valve.
Regards,
fulltech.

Posted on Jul 28, 2010

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A small machine can advertise 2400 psi ... but that is for 3 square inches at a time. The heavier machine shoots a 10" or wider swath of 2400psi.

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