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SOURCE: the motor is pulsing on and off without the trigger being pressed
It is probably sucking air on one of the connections or around one of the fittings at the regulator. You can also turn the pressure up allittle on the regulator, that might stop it also. Make sure the clamps on the hoses going to the regulator is tite. Also it could be that the regulator is just bypassing water and if it has air in it it will pulsate.
SOURCE: poor pressure
i had this same problem on my pressure washer.the pump had some broken parts in it .i found my replacement pump on EBay.
SOURCE: pressure washer is pulsating when powered on
it just the presure building back up ,it will last years doing this,i would not worrie as replacing the presure pump will only be a temp fix and it will do it again ,most washes do this after a year or lots of use.
SOURCE: Karcher 360M pressure washer pulsating problem when idleing
Hello,
unfortunately these little units have this problem commonly, 9 times out of 10 it will be the plastic head or the plastic valve block on the unit will be cracked and leaking slightly... it builds up pressure then leaks out and tries to build up the pressure again and this just reoccurs over and over...
you can get this repaired but is normally about half the cost of a new unit, if the pressure is still okay i would probably recommend just keep using it until it proper dies...
If you do get this fixed, we have studied into this and believe the main cause of heads cracking is warm water say if your inlet hose is in the sun for a period of time this can cause the water to become quite hot or if the unit sits and water trapped inside the head assy freezes can also cause this.
Hope this helps
Kind Regards
Brad
Testimonial: "Thanks very much brado83. The cycling interval has now increased, so I am going to try to fix this myself.You have confirmed my part suspicions.Cheers"
SOURCE: Why does my karcher pressure washer pulsate when
Hi Richard,
If by pulsate you mean the engine R.P.M.'s rising and falling, this is natural. It's the result of the engine reacting to the sudden back pressure in the pump by idling down.
The engine continues to maintain a constant pressure on the water cycling inside the pump while idle. It cycles within the pump because water can't be compressed. If there was no place for it to go, the weakest seal would blow or the engine would die.
When you pull the trigger again the pressure is no longer bogging the engine and the R.P.M.s smooth out.
Also, it's not good for it to be running for any extended length of time without water or the trigger being pulled.
Hope this answers it
Best regards,
Mike
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