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Karcher Pressure Washer O Ring Kit Stock Number: ES537803

Karcher Pressure Washer O Ring Kit - ES537803

4.7 out of 5 Rated 4.7 out of 5(82 customers)

Keep your pressure washer hose and hand gun leak-free with these replacement seals

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Manufactured by Karcher

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Pressure Washer O Ring Kit

If you are struggling to control the leak from your Karcher hose, trigger gun or other Karcher accessories, eSpares has just what you need. This Karcher replacement o-ring kit offers you the leak free experience.

This Karcher O ring kit contains 16 o rings and 4 yellow rubber stoppers. The O rings consist of 5 different sizes to make sure you will always be covered no matter the accessory, no matter the size. With the rubber stoppers you will be able to use your Karcher accessories without the fear of a leak again!

With the help of eSpares and this fantastic accessory, you can soon be on your way to cleaning the garden in no time!


  • 16 O-rings (across 5 sizes)
  • 4 yellow rubber stoppers

Genuine spare part for select models of Karcher pressure washers.

Please check the suitable model fit list to ensure that this is the correct part for your appliance.

Karcher spares reference: 2.640-729.0

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Here’s what other people are saying about Karcher Pressure Washer O Ring Kit.

(82 reviews)

4.7 out of 5

Ease of fitting 4 out of 5
Quality 5 out of 5
Value 5 out of 5
  • Harwich, Essex
    4.0 out of 5

    oops. wrong kit!

    I thought this was a complete seal kit but actually is only the parts for the exterior fittings. I need new seals for the internals so I'll have to put a new order in. Hey ho. My fault I guess

    Ease of fitting 5.0 out of 5
    Quality 5.0 out of 5
    Value 5.0 out of 5
  • Isle of Man
    5.0 out of 5

    Karcher parts

    Excellent way to keep it working like new. Wands and hose easy to attach again.

    Ease of fitting 5.0 out of 5
    Quality 5.0 out of 5
    Value 5.0 out of 5
  • blackpool
    5.0 out of 5

    Genuine parts

    I found the pressure washer o ring kit very useful I only used a few of the washers as some of the original ones were ok.

    Ease of fitting 3.0 out of 5
    Quality 5.0 out of 5
    Value 5.0 out of 5
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Ask a Question

28 Questions and 28 Answers

By S Brown - Lancashire - 06 June 2016
  • I replaced the capacitor - my machine just stopped working - water flowed through fine at low pressure but the pump stopped. New capacitor solved the problem By DLP - woking - 01 August 2016
  • Chris from eSpares
    Chris at eSpares says...

    For information on your repair see our video: How to Diagnose Pressure Washer Electrical Problems:

Answer this question
By crippin - Pontypool Torfaen - 08 January 2012
  • you may have a leaking O ring By Clive - Swansea - 06 June 2013
  • Hi Crippen sounds like you have a fracture in the control head as I did, this opens when the machine builds up presure and then releases it through the fracture, it is likely the fracture is under the metal head plate used to secure the unit head hence you cant see it, I know your post is long ago but this may help others as when I read the posts on the espares site it was no end of help to me. If the seals are ok on everything else I suggest replacing the control head housing. By Rob - N Ireland - 08 January 2013
Answer this question

Model. K2 900m / 1.671-344

By John French - Charlton - 29 August 2017
  • Chris from eSpares
    Chris at eSpares says...

    The O rings only stop a leak and will not cure your problem. Suspect a blockage or restriction in the spray lance if the spray is fine and the machine cycles on and off repeatedly.

Answer this question

I have a Karcher k2.396 pressure washer and it is leaking badly I will order new ones if I know how to fit them, can you help?

By Sue Fellows - Birmingham - 18 August 2017
  • Dean from eSpares
    Dean at eSpares says...

    Please see our video for information just copy and paste into your browser.

Answer this question

The Chemical Discharge bottle will continue to fill up without any power on and then stops as the pump uses the water with power. I reckon it is probably a valve maybe that feeds the clear plastic pipe. Can you advise please which part /valve requires replacing. Mine is a K6.50Mb unit.

By Mike - Manchester - 09 March 2016
  • Chris from eSpares
    Chris at eSpares says...

    The problem is likely to be caused by Stock Number: ES1751853 leaking.

Answer this question
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