Question about Karcher 2500 PSI Pressure Washer

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Karcher 620m runs but will not pump water - Karcher 2500 PSI Pressure Washer

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The pump that connects to the motor could be bad/and or loose

Posted on May 10, 2009

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Most likely the inner head gasket has blown allowing the high pressure side to recirculate to the low pressure side... making the cleaner pump nothing much out the nozzle. This is a very common problem with this model.

Posted on Sep 22, 2012

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: what oil grade is correct for Karcher 620m pump?

I don't know either. Anyone got an answer?

Posted on Mar 06, 2011

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1 Answer

Water coming out of detergent pipe from top for karcher 3030 b jet wash


DISCONNECT HYDRO OR WITH ENGINE NOT RUNNING DISCONNECT SPARK PLUG THEN RE-LEAVE WATER PRESSURE BEFORE SERVICING the detergent pipe plugs into a pipe on the pump, under which is a spring and ball bearing (stuck open, debris) WEAR YOUR SAFETY GLASSES

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Karcher pressure washer 620m motor only runs with switch held down but will not water pressur is the same as tap pressure out the nozzle


it is not uncommon that the switch is bad? if the switch controls the pressure telling it their is water and to start working? then i would just replace the switch.

Dec 17, 2013 | Karcher Garden

1 Answer

Karcher 620m wont work at high pressure


what you describe indicates a problem hose or block nozzle jet
if it doesn't play up with a normal nozzle then it is not the hose or jet but that particular wand and nozzle you are using
do you have a sufficient inlet water supply for the pump

May 01, 2017 | Karcher Garden

1 Answer

What oil grade is correct for Karcher 620m pump?


I don't know either. Anyone got an answer?

Jan 07, 2011 | Karcher Garden

1 Answer

Need manual for karcher 620m


Hi. Please click here to download the manual.

Let me know if you need further assistance. Thank you for using FixYa.

Jun 05, 2010 | Garden

2 Answers

Karcher prssure washer motor will not start


try going to www.karcher.com
then click on europe
the international,
then service and will then see spare parts, enter k620
tick the button for you are a engineer and you are on your machine
download.
micro switch might be at fault.

Mar 25, 2009 | Karcher Garden

1 Answer

Hi,karcher hds hot pressure washer now pressure when you pull trigger and pulses.


what you need to do is, take the screw fitting which goes to the water tank off, then the one that goes from the water tank to the pump head .
then put the one that was in the first place going to the water tank on to the pump and force feed with water.
see if you can see water leaking from any where seals hose.
try running the machine to check the pressure.
if water leaking from pump head you need seals.

Mar 21, 2009 | Karcher Garden

1 Answer

Karcher Pressure washer


Hi
don't know if this will help, but when I use mine, to start the pressure up I have to turn the nozzle to fine spray then turn it to the power spray and it works every time, shouldn't have to do this but I got it for nothing.

May 29, 2008 | Washing Machines

2 Answers

Karcher 620M not drawing water


my 620m has a problem when i press the switch on it has no pressure and the pump sounds like it is not kicking in .... plese help !!!
steve ..

Jan 08, 2008 | Washing Machines

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