Question about Karcher 2500 PSI Pressure Washer

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Pressure starts and stops

When I start to pressure wash it holds pressure for a few seconds and then cuts out. I have plenty of water going to the unit--there are no kinks in the line etc....It just pressures up, the engine revs, and then it cuts out. After a second or two it pressures up again. Thoughts?

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  • 13 Answers

Sounds like your unloader valve is sticking. It needs to be removed and lubed with lithium grease.

Posted on Jul 16, 2010

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