Question about Karcher 2500 PSI Pressure Washer

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My Karcher 2400 PSI pressure washer is not starting after about 5 years. What type of spark plug and gap should I change the old out with and what kind of oil do you recommend. I don't think I have ever changed the oil but way less that 50 hours on the machine. Thanks

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 92 Answers

SOURCE: trouble with Karcher Pressure washer

Dear Pgarciax,
It is important that you must have mentioned the model number of your Karcher. Just the same I can surely say that your machine's fault lies in the "SPILL VALVE"
When the gun is open and pressure is being produced, the spill valve is in a relaxed position. Also it has at the bottom a valve, which when pressure is produced it is closed. If this does not close due to dirt or corrosion, the pessure goes down. Now when you close the gun,pressure forces the spill valve down to close the electrical system. Now if the "o" rings of the spill valve are damaged, the machine will start going on and off while in stand-by. So if you know how to locate the Spill Valve, all one has to do is change it with a new one.
In some Karcher machines there are 2 spill valves. One regulates pressure and the other one is for switching off the machine when the gun is closed.
Low pressure could also be due to faulty suction or delivery valves. Most probably the suction valves.
But when saying that there are short interruptions while in stand by, I stick to the fact that the spill valve needs renewing.
Regards,
MG.

Posted on Nov 19, 2008

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SOURCE: karcher 2600 psi pressure washer wont stay running

Remove and clean the carburator. Sound line a stuck needle on the float. 

Posted on Apr 22, 2009

  • 3600 Answers

SOURCE: pressure washer that leaks oil through the air breather

Most likely your air filter is plugged or dirty, or the crank case vent valve needs to be cleaned.if it still does it check that the oil level is at the full mark, if overfilled it would cause the same problem.

Posted on Jun 22, 2009

deme-tri
  • 90 Answers

SOURCE: karcher 2400 psi washer- no pressure

if the water is flowing
the valves need to change
if no water pistons in pump need to change.

Posted on Aug 01, 2009

  • 3 Answers

SOURCE: Karcher pressure washer with Honda GC160 engine only runs on chok

You need to remove the carb bowl, then with a small flat screwdriver remove the jet. ( on the side, at the bottom of stem.) take a small wire or toothpick and clean the gunk out of the jet, reassemble and open fuel valve, start, and pat yourself on your back.

Posted on Aug 04, 2009

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1 Answer

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if the water is flowing
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best regards savumihai71

Jan 28, 2009 | Karcher 2500 PSI Pressure Washer

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Speed regulation on small engines is notriously fussy.
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If not, then either replacing it or changing the length by shortening or lengthening it will probably be needed.

Aug 09, 2008 | Karcher 2500 PSI Pressure Washer

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