Question about Karcher 2500 PSI Pressure Washer

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No high pressure

Does not reach high pressure it is the gas powered ithink itis the 2500psi model

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These pumps are notorious for seasonal problems.
Tip the unit to the point you can pour engine oil into the water inlet connection. What your attempting to do is free up the ball seats in the pump. They get corroded when they sit and lock in place. Adding the oil or a vast amount of WD 40 to the water inlet often does the trick for loosening up the seat balls and springs.
After you add the oil (3 - 4 ounces) or WD 40 to the water inlet line just slowly pull the engine through with the ignition switch off. As the water inlet cavitates add more oil.
Let it sit over night and then take a block of wood and a hammer and tap on the power head. Don't over do it and do it in such a manner your not going to shear off any bolts or break anything. But... be serious with the hammer and block of wood.
Then connect inlet water hose, the pressure hose and test the unit. You may want to purge the oil lubricant into a bucket before you start the engine.
Give it a try and see what happens.

Thanks for using FixYa,
Kelly

Posted on May 04, 2010

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Posted on Jan 02, 2017

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