Question about Karcher 2500 PSI Pressure Washer
Devilbiss Excell EXH 2425 - unit is 6 yrs old with about 12 to 16 hours of run time. Pump oil level is normal, never had to add. The few times used just prior to failure, the unit seemed to take much longer to initiate the pressure spray ( kind of like a self priming pump with loose seals on the suction side). I have always made certain that water was flowing through the unit and out the spray nozzle prior to starting the engine.
I have since carefully removed the brass end plate and have confirmed that all three pistons move in and out when I pull the recoil rope, so it seems apparent that all is well on the front end. All ''O'' rings appear to be in good condition. What's up with this thing. I know these things don't have the best reputation for long life but 16 hours ? really.
Can anyone offer some advice on what else I might look for?
Hi and welcome to FixYa. I am Kelly
I am not sure which pump you have but there was one that was a real piece of **** and has since been discontinued due to a VERY SHORT service life.
This is going to sound odd... but tap with some conviction on the power head using a hammer and a "hard block" of wood with the unit static and then again with the engine at low speed. Your attemting to losen the check valve balls in the pressure head that sometimes get corrosion in the ball seat. Then test the output pressure. If your pump has a pressure output adjustment (black knob 3.5 inches long / high with a brass knurled lock nut under it) then losen the lock nut and back the adjustment off substantially and re-test pressure. Once you have output pressure return it to the previous position.
You have a 50 - 50 chance of getting your pressure back by doing the above steps.
Posted on May 03, 2010
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Posted on Jan 02, 2017
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