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My power washer developed a leak which I could not fix with plumber's tape or a new washer this time. I opened it up and removed the spring switch to identify where water leaks from. I don't know how to fix this one.

I tried to apply a silicon sealant which prevented it from leaking when not in use. However after a few seconds of usage it started leaking again.

I don't know which brand this is as it is now 13 years old. Does anyone know how to plug the leak as shown in the photo?

enter image description here

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    Imagine that is the high pressure side, so silicon or tape will not do much good. 13 years probably the parts are worn and need to be replaced for proper sealing. Might even be able to just get a replacement pump that will fit on the motor.
    – crip659
    Jul 29, 2022 at 18:00
  • There's no builder plate or brand labeling anywhere at all on the machine? Maybe post a full picture of it and someone might recognize it. I'd agree with @crip659 - after 13 years, the high pressure side springs, washers, seals, etc. are simply wearing out and replacement of individual seals or the mechanism in your second pic, or a larger part may be called for. Slathering silicone sealant everywhere sounds like a recipe for ensuring that parts need to be replaced, though.
    – FreeMan
    Jul 29, 2022 at 18:55
  • if you pull out that "staple" you should be able to remove the leaking part, whether that can be easily corrected (eg replace the O rings) or needs replacement I can't say.
    – Jasen
    Jul 29, 2022 at 21:53
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    After 13 years, there's likely to be some corrosion (even on aluminum) holding bits together. Try some penetrating fluid (my favorite is PB Blaster, WD40 will work in a pinch).
    – FreeMan
    Jul 29, 2022 at 22:31
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    or turn the pump on and extract it by hydraulic pressure.
    – Jasen
    Jul 29, 2022 at 23:21

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