RE: Karcher Ser.#122783 Pressure Washer K3 97M My Karcher is several years old. During recent efforts to use it, the unit "chugs" when I squeeze the handle rather than making the familiar steady pumping sound. The pressure is also down significantly. I will appreciate your input on how I might address this problem. T A Rounds

SOURCE: when I squeez the handle the pressure surges.

Hi:
The first thing i would do is be sure there is not a partial blockage in the nozzle.

Kelly

• 3740 Answers
• Posted on Apr 18, 2010

SOURCE: I can use my Karcher K3 jet wash as long as i hold trigger down

Most pressure washers have ball lock type fittings on the hose connections. What happens is the little steel balls get a bit of corrosion and do not lock the male fitting properly with the female coupling. Load up the fitting with some Oil or WD 40. Then connect and disconnect the fitting several times to losen up the balls and springs. Should the spring in the coupling break you will get the exact symptom your describing.

If the OIL / WD 40 does not do the trick then you may have to change out the quick disconnect coupling.

Kelly